An apparatus for automatically detecting surface defects of a sheet product with a material box

Abstract

The application discloses a kind of surface defect automatic detection equipment of sheet product with material box, including material box conveying mechanism, feed material box transfer mechanism, feeding mechanism, feeding gripping mechanism, feed box transmission mechanism, empty material box storage mechanism, image shooting detection system, control system, detection moving mechanism, discharging mechanism, discharge gripping mechanism, discharge storage mechanism, full material box discharge mechanism, NG paper storage mechanism and discharge material box transfer mechanism, advantage is when detecting the surface defect of sheet product, it can be detected without removing the whole stack of sheet product from material box, so as to omit the operation of manually placing the sheet product that passes detection to material box again, without causing secondary damage, detection efficiency is high, and the surface defect automatic detection equipment of sheet product with material box is low in labor cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a surface defect automatic detection equipment of sheet products, in particular to a surface defect automatic detection equipment of sheet products with a material box. BACKGROUND

[0002] At present, sheet products are widely used in modern industrial production, such as chip carriers on integrated circuits, etc. With the rapid development of industry and the improvement of product quality requirements, the corresponding detection requirements of sheet products are also higher and higher. Surface defects are the main factors leading to poor quality of sheet products. At present, when detecting the surface defects of sheet products, the sheet products are stacked in the material box and transferred to the detection process. During detection, the sheet products are taken out from the material box by manual, placed in the surface defect detection equipment in the form of a whole stack, and then detected by a mechanical hand. After detection, it is determined whether the sheet products are qualified or not. The qualified products are stacked by the mechanical hand and transferred to the qualified product area in the form of a whole stack. The unqualified products are stacked and transferred to the unqualified product area. Finally, the whole stack of sheet products in the qualified product area is placed in the material box again by the worker and transferred to the next station.

[0003] However, the existing surface defect detection equipment needs to take out the whole stack of sheet products from the material box by manual, and then put the whole stack of sheet products into the material box by manual after detection. The process of taking and placing materials by manual not only easily causes secondary damage to the sheet products, but also increases the labor cost and reduces the detection efficiency. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a surface defect automatic detection equipment of sheet products with a material box, which can detect the surface defects of sheet products without taking out the whole stack of sheet products from the material box, thereby omitting the operation of placing the qualified sheet products into the material box by manual, avoiding secondary damage, improving the detection efficiency, and reducing the labor cost.

[0005] The application solves the above technical problems by adopting the technical scheme of a kind of surface defect automatic detection equipment of sheet product with material box, including material box conveying mechanism, feeding material box transfer mechanism, feeding mechanism, feeding grabbing mechanism, feeding box transmission mechanism, empty material box storage mechanism, image shooting detection system, control system, detection moving mechanism, discharging mechanism, discharging grabbing mechanism, discharging storage mechanism, full material box discharging mechanism, NG paper storage mechanism and discharging material box transfer mechanism, the control system is connected with the material box conveying mechanism, the feeding material box transfer mechanism, the feeding mechanism, the feeding grabbing mechanism, the feeding box transmission mechanism, the empty material box storage mechanism, the image shooting detection system, the detection moving mechanism, the discharging mechanism, the discharging grabbing mechanism, the discharging storage mechanism, the full material box discharging mechanism, the NG paper storage mechanism and the discharging material box transfer mechanism respectively, the control system is used for controlling the material box conveying mechanism, the feeding material box transfer mechanism, the feeding mechanism, the feeding grabbing mechanism, the feeding box transmission mechanism, the empty material box storage mechanism, the image shooting detection system, the detection moving mechanism, the discharging mechanism, the discharging grabbing mechanism, the discharging storage mechanism, the full material box discharging mechanism, the NG paper storage mechanism and the discharging material box transfer mechanism work together, the feeding material box transfer mechanism is arranged at the rear side of the material box conveying mechanism, the feeding mechanism is arranged at the rear side of the feeding material box transfer mechanism, the feeding grabbing mechanism is arranged at the upper side of the feeding mechanism, the feeding box transmission mechanism is arranged at the rear side of the feeding mechanism, the image shooting detection system is arranged at the left side or right side of the feeding grabbing mechanism, the detection moving mechanism is arranged at the rear side of the feeding grabbing mechanism, the empty material box storage mechanism is arranged at the rear side of the detection moving mechanism, the discharging grabbing mechanism is arranged at one side of the image shooting detection system, the discharging mechanism is located at the lower side of the discharging grabbing mechanism, the discharging storage mechanism is arranged at the front side of the discharging mechanism, the full material box discharging mechanism is arranged at the lower side of the discharging storage mechanism, the NG paper storage mechanism is arranged at the rear side of the discharging storage mechanism, and the discharging material box transfer mechanism is arranged at the front side of the discharging mechanism.The empty box is placed in the discharge storage mechanism by manual operation in advance, the discharge storage mechanism is used to transfer the box placed there to the discharging mechanism, the box conveying mechanism is used to convey the full box to the feeding box transfer mechanism, the feeding box transfer mechanism is used to transfer the box to the feeding box driving mechanism, the feeding mechanism is used to hold the box conveyed by the feeding box driving mechanism, the feeding grabbing mechanism is used to hold the sheet product in the box and transfer it to the detection moving mechanism, the detection moving mechanism is used to transfer the sheet product to the image shooting detection system and then to the discharge grabbing mechanism, the image shooting detection system is used to shoot the image of the sheet product and identify the defect through the pre-stored image recognition program, and the conclusion of whether the sheet product is qualified or not is sent to the control system, the discharge grabbing mechanism is used to hold the sheet product under the control of the control system, and the qualified sheet product is put into the box on the discharging mechanism, and the unqualified sheet product is put into the NG separator storage mechanism, at this time, the detection of one sheet product is completed, after the detection of the sheet product in the box held by the feeding mechanism is completed, the box held by the feeding mechanism is empty, the box on the discharging mechanism is full of sheet products, at this time, the discharging mechanism moves the full box on it to the discharge box transfer mechanism, the discharge box transfer mechanism transfers the box moved to it to the full box discharge mechanism for storage, waiting for the staff to take it away, at the same time, the feeding mechanism is lowered, and the box falls on the feeding box driving mechanism, and the feeding box driving mechanism transfers the box to the empty box storage mechanism for storage.

[0006] The material box conveying mechanism comprises two side plates, a first bottom plate, a top plate, n drawer conveying mechanisms, n first sensors for detecting whether the material is empty and a signal alarm lamp, n is an integer greater than or equal to 2, the n first sensors and the signal alarm lamp are connected with the control system respectively, the two side plates are fixed on the left and right sides of the first bottom plate respectively, the top plate is fixed above the two side plates, the two side plates, the first bottom plate and the top plate enclose a front-to-back through material conveying channel, the n drawer conveying mechanisms are arranged in n layers from top to bottom in the material conveying channel, the n first sensors are installed one by one at the rear end of the n drawer conveying mechanisms, and the signal alarm lamp is installed at the left end of any one of the side plates; before the material box conveying mechanism starts to work, workers place material boxes filled with sheet products on the n drawer conveying mechanisms, and the material boxes on each drawer conveying mechanism are arranged in order from front to back until the front end of the first sensor arranged at the rear end; after the material box conveying mechanism starts to work, the control system controls the n drawer conveying mechanisms to work in order from top to bottom, first controls the feeding material box transfer mechanism to ascend and align with a certain layer of drawer conveying mechanism currently working, then transfers the material boxes on the drawer conveying mechanism to the feeding material box transfer mechanism, when the material boxes on a certain layer of drawer conveying mechanism are conveyed, there will be no material boxes passing through the first sensor installed on the drawer conveying mechanism, at this time, the first sensor installed on the drawer conveying mechanism cannot sense the passing of the material boxes, generates a signal representing empty material and sends it to the control system, the control system judges that the drawer conveying mechanism has completed the conveying after receiving the signal representing empty material for a preset time (20 seconds), at this time, the control system controls the drawer conveying mechanism to stop working, then controls the feeding material box transfer mechanism to descend to be connected with the next layer of drawer conveying mechanism, and controls the next layer of drawer conveying mechanism to start the conveying work, and transfers the material boxes to the feeding material box transfer mechanism, until the control system judges that the lowest layer of drawer conveying mechanism has completed the conveying, at this time, the control system controls the signal alarm lamp to alarm and reminds the workers to refill.

[0007] Each of the drawer conveying mechanisms comprises two slide rails, a drawer reference plate, a first belt conveying mechanism, a transmission wheel, a main transmission shaft, a drawer panel, a first bevel gear and a second bevel gear, the two slide rails are installed on the two side plates one by one and can move forward and backward relative to the two side plates, the drawer reference plate is fixed on the two slide rails, the first belt conveying mechanism is located above the drawer reference plate and is fixed on the drawer reference plate, the first belt conveying mechanism itself has no power, the main transmission shaft is located on the left side of the first belt conveying mechanism and is installed on the first belt conveying mechanism, the transmission wheel is fixed on the rear end of the main transmission shaft, a groove is arranged on the rear end surface of the transmission wheel, the first bevel gear is fixed on the front end of the main transmission shaft, the second bevel gear is fixed on the first belt conveying mechanism, the first bevel gear and the second bevel gear are meshed with each other and form an angle of 90 degrees, and the drawer panel is fixed on the front end of the drawer reference plate; when the workers put the materials, they only need to pull the drawer panel forward, at this time, the drawer panel will drive the drawer reference plate and the two slide rails to move forward, the first belt conveying mechanism also moves forward with the drawer reference plate, the workers put the material boxes on the first belt conveying mechanism in sequence until the front end of the first sensor on the drawer conveying mechanism, the material boxes are placed, at this time, the drawer panel is pushed backward, the drawer reference plate and the two slide rails also move backward, the first belt conveying mechanism moves backward with the drawer reference plate, and stops moving when it moves to the initial position of the two slide rails, and the feeding of the drawer conveying mechanism is completed; since the first belt conveying mechanism itself has no power, the material boxes remain stationary on the first belt conveying mechanism without external power driving the first belt conveying mechanism, when the control system controls the material boxes to flow to the feeding material box transfer mechanism of a drawer conveying mechanism, the control system controls the external power to be transmitted to the transmission wheel of the drawer conveying mechanism at this time, the transmission wheel drives the main transmission shaft to rotate, the first bevel gear also rotates with the main transmission shaft, since the first bevel gear and the second bevel gear are meshed with each other, the second bevel gear also rotates, the second bevel gear is connected with the first belt conveying mechanism, at this time, the first belt conveying mechanism starts conveying work under the driving of the external power and sends the material boxes on it from front to back to the feeding material box transfer mechanism.

[0008] The feeding magazine transfer mechanism comprises a lifting mechanism, a lifting bottom plate, a second belt conveying mechanism, a first guide plate, a material blocking mechanism, a material lifting mechanism, a second sensor and a shaft coupling transmission mechanism, the lifting mechanism, the second belt conveying mechanism, the material blocking mechanism, the material lifting mechanism, the second sensor and the shaft coupling transmission mechanism are connected with the control system respectively, the lifting bottom plate is fixed on the lifting mechanism, the second belt conveying mechanism is fixed on the lifting bottom plate, the lifting mechanism is used to drive the lifting bottom plate to lift under the control of the control system, so that the second belt conveying mechanism is aligned with the first belt conveying mechanism of a certain layer of drawer conveying mechanism in the magazine conveying mechanism which needs to perform magazine conveying work, the first guide plate is fixed on the side of the second belt conveying mechanism, when the magazine conveyed onto the second belt conveying mechanism is inclined and contacts with the first guide plate, the first guide plate adjusts the orientation of the magazine on the second belt conveying mechanism to a preset orientation, the second sensor, the material lifting mechanism and the material blocking mechanism are respectively installed on the lifting bottom plate, the material lifting mechanism is located at the back side of the second sensor, the material blocking mechanism is located at the back side of the material lifting mechanism, the shaft coupling transmission mechanism is fixed on the lifting bottom plate and located outside the second belt conveying mechanism, when the feeding magazine transfer mechanism works, the second belt conveying mechanism is aligned with a certain layer of drawer conveying mechanism in the magazine conveying mechanism which needs to perform magazine conveying work under the control of the control system, the shaft coupling transmission mechanism is used to provide power for the first belt conveying mechanism of a certain layer of drawer conveying mechanism in the magazine conveying mechanism which needs to perform magazine conveying work, drive the first belt conveying mechanism of the drawer conveying mechanism to rotate forward or reversely, when the shaft coupling transmission mechanism drives the first belt conveying mechanism of a certain layer of drawer conveying mechanism which needs to perform magazine conveying work to rotate forward, the first belt conveying mechanism conveys the magazine thereon from front to back and sends the magazine into the second belt conveying mechanism, the second belt conveying mechanism also rotates forward to convey the magazine thereon from front to back under the control of the control system, the second sensor is used to sense whether there is a magazine on the second belt conveying mechanism, when the second belt conveying mechanism conveys the magazine to the second sensor, the second sensor senses the magazine and sends a signal representing the magazine to the control system, the control system controls the material blocking mechanism to rise and block the magazine first, then controls the material lifting mechanism to lift the magazine, then the control system controls the second belt conveying mechanism and the shaft coupling transmission mechanism to reverse, at this time, the remaining magazine on the second belt conveying mechanism is conveyed from back to front and sent back to the first belt conveying mechanism of a certain layer of drawer conveying mechanism which is aligned with the second belt conveying mechanism from back to front.When all the remaining cartridges on the second belt conveying mechanism are sent back, the control system first controls the second belt conveying mechanism and the shaft coupling transmission mechanism to stop working, at this time the first belt conveying mechanism of the drawer conveying mechanism in a certain layer which is aligned with the second belt conveying mechanism also stops rotating, then controls the top material mechanism and the material blocking mechanism to reset, the cartridges on the top material mechanism fall back to the second belt conveying mechanism, at this time the control system controls the second belt conveying mechanism to rotate forward to send the cartridges to the cartridge conveying mechanism, when the control system controls the top material mechanism to hold the cartridges conveyed by the cartridge conveying mechanism, the control system controls the shaft coupling transmission mechanism to provide forward power to the first belt conveying mechanism of the drawer conveying mechanism which is working to convey the cartridges, so that the first belt conveying mechanism transmits the cartridges from front to back, and the cartridges are continuously sent to the second belt conveying mechanism, the second belt conveying mechanism again conveys the cartridges into it, and starts the transfer of the next cartridge, and the process is repeated.

[0009] The coupling transmission mechanism comprises two cylinders, a servo motor, two stretching blocks, two springs, a coupling block, a coupling sheet and a rotating disc, the servo motor is fixed outside the lifting base plate, two cylinders are fixed on the upper and lower sides of the servo motor respectively, two stretching blocks are fixed on the guide rods of the two cylinders one by one, the guide rods of the two cylinders are on the same side of the rotating shaft of the servo motor, the coupling sheet, the rotating disc and the coupling block are coaxially fixed on the rotating shaft of the servo motor in the order from back to front, two recessed holes are arranged on the front end face of the coupling sheet and located on the same side of the rotating shaft of the servo motor, the rear parts of two springs are embedded in the two recessed holes one by one, and the rear ends of the two springs abut against the bottom of the two recessed holes, two first column pins are fixed on the rear end face of the rotating disc, the two first column pins are inserted in the two springs one by one, two second column pins are fixed on the front end face of the rotating disc and located on the same side of the rotating shaft of the servo motor, two front and rear through guide holes are arranged on the coupling block, the two second column pins are inserted in the two guide holes one by one, the two stretching blocks hold the rotating disc, in the initial state, the guide rods of the two cylinders are in the retracted state, the two stretching blocks pull the rotating disc back, at this time, the two springs are compressed by the stretching blocks, the two second column pins on the rotating disc move backward, and the front ends are located inside the two guide holes, when the coupling transmission mechanism provides power for a certain layer of drawer conveying mechanism which needs to carry out the work of the magazine conveying mechanism, the control system controls the guide rods of the two cylinders to extend, the two springs pop the rotating disc back to the original position due to the elastic force of the two springs, the two second column pins on the rotating disc extend from the front ends of the two guide holes at this time, at this time, the two second column pins are inserted into the grooves of the transmission wheels of a certain layer of drawer conveying mechanism which needs to carry out the work of the magazine conveying mechanism, the servo motor starts to rotate under the control of the control system, drives the rotating disc to rotate, the two second column pins on the rotating disc also rotate, and drive the transmission wheels of a certain layer of drawer conveying mechanism which needs to carry out the work of the magazine conveying mechanism to rotate synchronously, so as to drive the first belt conveying mechanism of the drawer conveying mechanism to rotate, if the servo motor rotates forward, at this time, the first belt conveying mechanism of the drawer conveying mechanism transmits and conveys the magazines on it from front to back to the second belt conveying mechanism, if the servo motor rotates reversely, the first belt conveying mechanism of the drawer conveying mechanism transmits and conveys the magazines on it from back to front.

[0010] The empty box storage mechanism comprises a support plate, two linear guides, a lead screw, an adjusting hand wheel, two fixed plates, two guide strips, two guide plates, a guide piece, a third sensor for sensing the box and a storage mechanism, the third sensor is connected with the control system, the support plate is installed on the rear side of the detection moving mechanism, two linear guides are located on the left side of the support plate, both linear guides are fixed on the support plate and are distributed in an upper and lower interval, both linear guides are arranged in parallel along the front and rear directions, the lead screw is located in the middle of the two linear guides and is fixed on the support plate, the axial direction of the lead screw is along the front and rear directions, the adjusting hand wheel is fixed on the front end of the lead screw, the two linear guides are respectively referred to as a first linear guide and a second linear guide, the first linear guide is provided with a first sliding block and a second sliding block, the first sliding block is located on the front side of the second sliding block, the first sliding block and the second sliding block can move forward and backward along the first linear guide under the action of force, the second linear guide is provided with a third sliding block and a fourth sliding block, the third sliding block is located on the front side of the fourth sliding block, the third sliding block and the fourth sliding block can move forward and backward along the second linear guide under the action of force, the first sliding block is opposite to the third sliding block, the second sliding block is opposite to the fourth sliding block, the two fixed plates are respectively referred to as a first fixed plate and a second fixed plate, the first fixed plate is arranged between the first sliding block and the third sliding block, the first fixed plate is fixedly connected with the first sliding block and the third sliding block respectively, the second fixed plate is arranged between the second sliding block and the fourth sliding block, the second fixed plate is fixedly connected with the second sliding block and the fourth sliding block respectively, the front end of the lead screw penetrates through the first fixed plate, the lead screw is in threaded connection with the first fixed plate, the second fixed plate is fixed with the support plate, the two guide strips are respectively referred to as a first guide strip and a second guide strip, the first guide strip is located on the left side of the first fixed plate and is fixedly connected with the first fixed plate, the second guide strip is located on the left side of the second fixed plate and is fixedly connected with the second fixed plate, the left ends of the first guide strip and the second guide strip are aligned in front and back directions, the two guide plates are respectively referred to as a second guide plate and a third guide plate, the second guide plate is located on the left side of the first fixed plate and is fixedly connected with the first fixed plate, the third guide plate is located on the left side of the second fixed plate and is fixedly connected with the second fixed plate, an up and down through storage channel is formed between the first guide strip, the second guide plate, the second guide strip and the third guide plate, the distance between the second guide plate and the third guide plate corresponds to the width of the storage channel, the guide piece is arranged on the left side of the two guide plates and the left and right positions thereof can be adjusted,The distance between the guide and the left end of the two guide strips corresponds to the length of the storage channel, the third sensor is arranged on the bottom surface of the support plate and is used for sensing whether there is a cartridge, the storage mechanism includes two groups of needle type air cylinders, each group of needle type air cylinders is composed of n needle type air cylinders, n is an integer greater than or equal to 3, the two groups of needle type air cylinders are referred to as the first group of needle type air cylinders and the second group of needle type air cylinders, the first group of needle type air cylinders is installed below the front side of the second guide plate, the n needle type air cylinders of the first group of needle type air cylinders are arranged along a column in a spaced manner in sequence from right to left, the guide rods of the n needle type air cylinders of the first group of needle type air cylinders are all arranged rearward, the second group of needle type air cylinders is installed below the rear side of the third guide plate, the n needle type air cylinders of the second group of needle type air cylinders are arranged along a column in a spaced manner in sequence from right to left, the guide rods of the n needle type air cylinders of the second group of needle type air cylinders are all arranged forward, in the default state, the guide rods of the n needle type air cylinders of the first group of needle type air cylinders and the n needle type air cylinders of the second group of needle type air cylinders are all in the extended state and extend below the storage channel, the guide rods of the n needle type air cylinders of the first group of needle type air cylinders and the n needle type air cylinders of the second group of needle type air cylinders are in one-to-one correspondence and are connected, at this time, the storage channel is blocked, before use, the first guide strip, the second guide plate, the second guide strip and the third guide plate need to be adjusted first, so that the width of the storage channel is adjusted to match the width size of the cartridge, the staff first drives the lead screw to rotate by adjusting the adjusting hand wheel, at this time, the first fixed plate moves along the screw shaft to drive the first slider and the third slider to move synchronously, the first guide strip and the second guide plate also move, the width of the storage channel is changed to match the width of the cartridge, then the left and right positions of the guide are manually adjusted, the distance between the guide and the left end of the two guide strips is changed, so that the length of the storage channel matches the length of the cartridge; when the empty cartridge storage mechanism is used, the empty cartridge storage mechanism is used, the cartridge on the feeding cartridge transmission mechanism is located directly below the storage channel, the control system controls the feeding cartridge transmission mechanism to lift the cartridge upward, in the process of upward movement of the cartridge, the third sensor first senses the cartridge and sends a signal indicating that the cartridge has passed to the control system, the control system controls the guide rods of the n needle type air cylinders of the first group of needle type air cylinders and the n needle type air cylinders of the second group of needle type air cylinders to retract synchronously, at this time, the storage channel is opened, the cartridge continues to move upward into the storage channel, 2 seconds after the third sensor cannot sense the cartridge, the control system controls the guide rods of the n needle type air cylinders of the first group of needle type air cylinders and the n needle type air cylinders of the second group of needle type air cylinders to extend synchronously, then controls the feeding cartridge transmission mechanism to drive the cartridge to descend,When the hopper is lowered onto the guide rods of the n needle cylinders of the first group of needle cylinders and the guide rods of the n needle cylinders of the second group of needle cylinders, the hopper drive mechanism continues to lower to the reset position, the hopper is supported by the guide rods of the n needle cylinders of the first group of needle cylinders and the guide rods of the n needle cylinders of the second group of needle cylinders, when the next hopper is lifted by the hopper drive mechanism, the third sensor senses the arrival of the next hopper and sends a signal to the control system, the control system controls the guide rods of the n needle cylinders of the first group of needle cylinders and the guide rods of the n needle cylinders of the second group of needle cylinders to retract again, at this time the previous hopper on the guide rods of the n needle cylinders of the first group of needle cylinders and the guide rods of the n needle cylinders of the second group of needle cylinders falls and is stacked on the next hopper, moves upward with the next hopper, until the third sensor does not sense the hopper for 2 seconds, the control system first controls the guide rods of the n needle cylinders of the first group of needle cylinders and the guide rods of the n needle cylinders of the second group of needle cylinders to extend synchronously, and then controls the hopper drive mechanism to lower the hopper stacked on it, when the stacked hopper falls onto the guide rods of the n needle cylinders of the first group of needle cylinders and the guide rods of the n needle cylinders of the second group of needle cylinders, the hopper drive mechanism continues to lower to the reset position, the stacked hopper is supported by the guide rods of the n needle cylinders of the first group of needle cylinders and the guide rods of the n needle cylinders of the second group of needle cylinders again, and the operation is repeated until the hopper is full, and the hopper is taken away by hand.

[0011] The detection moving mechanism comprises a moving slide, a main supporting plate, a supporting assembly, a driving assembly and a pressing assembly. The main supporting plate is installed on the moving slide, and the moving slide is connected with the control system. A hollow slot is formed in the main supporting plate. The supporting assembly comprises two linear guides, two supporting strips and four sliding blocks. The two linear guides are respectively referred to as a third linear guide and a fourth linear guide. The two supporting strips are respectively referred to as a first supporting strip and a second supporting strip. The four sliding blocks are respectively referred to as a fifth sliding block, a sixth sliding block, a seventh sliding block and an eighth sliding block. The third linear guide is arranged along the left-right direction and is fixed at the front end of the main supporting plate. The fourth linear guide is arranged along the left-right direction and is fixed at the rear end of the main supporting plate. The fifth sliding block and the sixth sliding block are installed on the third linear guide and can move left and right along the third linear guide under stress. The fifth sliding block is located on the left side of the sixth sliding block. The seventh sliding block and the eighth sliding block are installed on the fourth linear guide and can move left and right along the fourth linear guide under stress. The seventh sliding block is located on the left side of the eighth sliding block. The first supporting strip and the second supporting strip are arranged in a left-right interval. The first supporting strip is located on the left side of the second supporting strip. The first supporting strip is parallel to the second supporting strip. The two ends of the first supporting strip are fixedly connected with the fifth sliding block and the seventh sliding block respectively. The two ends of the second supporting strip are fixedly connected with the sixth sliding block and the eighth sliding block respectively. The first supporting strip and the second supporting strip are perpendicular to the third linear guide and the fourth linear guide. The hollow slot is located between the first supporting strip and the second supporting strip. The driving assembly is used to drive the first supporting strip and the second supporting strip to move towards each other or move in the opposite direction, so as to adjust the distance between the first supporting strip and the second supporting strip. The pressing assembly comprises m first pressing head assemblies and m second pressing head assemblies. m is an integer greater than or equal to 4. The m first pressing head assemblies are installed on the first supporting strip at intervals. The m second pressing head assemblies are installed on the second supporting strip at intervals. The m first pressing head assemblies are used to press the left side edge of the sheet product. The m second pressing head assemblies are used to press the right side edge of the sheet product.

[0012] Each of the first pressure head assemblies comprises a cylinder fixing part, a first needle cylinder, a first spring, a second spring, a pressure head and a first pin shaft, the cylinder fixing part is mounted on the first support bar, a through hole is formed in the cylinder fixing part, the first needle cylinder is connected with the control system, the first needle cylinder is mounted on the left side of the cylinder fixing part, the needle part of the first needle cylinder is located in the through hole and can be extended from the through hole, the first spring and the second spring are respectively located on the front and back sides of the cylinder fixing part, the axial directions of the first spring and the second spring are the same as the axial direction of the through hole, the left ends of the first spring and the second spring are fixed on the cylinder fixing part, the pressure head comprises a connecting block and a pressing block, the bottom of the connecting block is mounted on the first support bar through a rotating shaft, the axial direction of the rotating shaft is the front-back direction, the pressing block is located on the right side of the connecting block, the pressing block is fixed on the upper part of the connecting block, the bottom of the pressing block is a flat surface, the first pin shaft is fixed on the connecting block, the axial direction of the first pin shaft is perpendicular to the axial direction of the through hole, the right ends of the first spring and the second spring are fixed on the first pin shaft, a guide groove is formed in the lower part of the connecting block, a guide block is fixed on the right side of the cylinder fixing part, the guide block is inserted into the guide groove, in the initial state, the first spring and the second spring are in the compressed state, the connecting block is inclined to the left, when the first spring and the second spring are stretched, the connecting block is perpendicular to the first support bar, and the bottom of the pressing block is on the horizontal plane; the m second pressure head assemblies and the m first pressure head assemblies are one-to-one corresponding, and the corresponding one second pressure head assembly and one first pressure head assembly are arranged symmetrically left and right.

[0013] The first support bar is provided with m first limiting heads at intervals, the m first limiting heads are staggered with the m first pressure head assemblies, the right end surface of each first limiting head is an inclined surface, the inclined surface is inclined upward from right to left, and the included angle between the inclined surface and the horizontal plane is 45 degrees, the second support bar is provided with m second limiting heads at intervals, the m second limiting heads are staggered with the m second pressure head assemblies, the m second limiting heads and the m first limiting heads are one-to-one corresponding, and the corresponding one second limiting head and one first limiting head are arranged symmetrically left and right.

[0014] The driving assembly comprises a motor, two ball screws, four synchronous pulleys, two synchronous belts and four width adjusting blocks, the two ball screws are respectively called first ball screw and second ball screw, the four synchronous pulleys are respectively called first synchronous pulley, second synchronous pulley, third synchronous pulley and fourth synchronous pulley, the two synchronous belts are respectively called first synchronous belt and second synchronous belt, and the four width adjusting blocks are respectively called first width adjusting block, second width adjusting block, third width adjusting block and fourth width adjusting block, the first ball screw is installed on the main supporting plate and located at the front side of the third linear guide rail, the second ball screw is installed on the main supporting plate and located at the rear side of the fourth linear guide rail, the third linear guide rail, the fourth linear guide rail, the first ball screw and the second ball screw are parallel to each other, the first synchronous pulley is fixed at the right end of the first ball screw, the second synchronous pulley is fixed at the right end of the second ball screw, the third synchronous pulley and the fourth synchronous pulley are located between the first synchronous pulley and the second synchronous pulley, the third synchronous pulley is located at the front side of the fourth synchronous pulley, the first synchronous belt is wound around the first synchronous pulley and the third synchronous pulley, the second synchronous belt is wound around the second synchronous pulley and the fourth synchronous pulley, the motor is installed on the moving sliding table and located at the right side of the main supporting plate, the motor is connected with the control system, the third synchronous pulley and the fourth synchronous pulley are fixedly connected with the output shaft of the motor respectively, the first width adjusting block is fixed at the front end of the first supporting strip, the second width adjusting block is fixed at the front end of the second supporting strip, the third width adjusting block is fixed at the rear end of the first supporting strip, the fourth width adjusting block is fixed at the rear end of the second supporting strip, the first ball screw passes through the first width adjusting block and the third width adjusting block respectively, the first width adjusting block and the third width adjusting block are threadedly connected with the first ball screw, the second ball screw passes through the second width adjusting block and the fourth width adjusting block respectively, the second width adjusting block and the fourth width adjusting block are threadedly connected with the second ball screw.When the motor is running under the control of the control system, the output shaft of the motor drives the third synchronous pulley and the fourth synchronous pulley to rotate synchronously, the third synchronous pulley drives the first synchronous pulley to rotate through the first synchronous belt, the first synchronous pulley drives the first ball screw to rotate, the fourth synchronous pulley drives the second synchronous pulley to rotate through the second synchronous belt, the second synchronous pulley drives the second ball screw to rotate, the first ball screw and the second ball screw rotate in opposite directions, at this time, the first width adjusting block and the third width adjusting block move left and right along the first ball screw, the second width adjusting block and the fourth width adjusting block move left and right along the second ball screw, thereby driving the first support strip and the second support strip to move synchronously relative to the third linear guide rail and the fourth linear guide rail in the left and right directions, so that the first support strip and the second support strip are close to or away from each other, and the distance between the first support strip and the second support strip is adjusted.

[0015] Compared with the prior art, the advantages of this invention are that it comprises a material box conveying mechanism, a feeding material box transfer mechanism, a feeding mechanism, a feeding gripping mechanism, a feeding material box transmission mechanism, an empty material box storage mechanism, an image capture and detection system, a control system, a detection moving mechanism, a unloading mechanism, an unloading gripping mechanism, an unloading storage mechanism, a full material box unloading mechanism, an NG paper separator storage mechanism, and an unloading material box transfer mechanism, forming an automatic surface defect detection device for sheet products with material boxes. The control system controls the material box conveying mechanism, the feeding material box transfer mechanism, the feeding mechanism, the feeding gripping mechanism, the feeding material box transmission mechanism, the empty material box storage mechanism, the image capture and detection system, the detection moving mechanism, the unloading mechanism, the unloading gripping mechanism, the unloading storage mechanism, the full material box unloading mechanism, the NG paper separator storage mechanism, and the unloading material box transfer mechanism. The paper-separating storage mechanism and the discharge box transfer mechanism work together. Empty boxes are pre-placed manually at the discharge storage mechanism, which then sequentially transfers these boxes to the unloading mechanism. Boxes filled with sheet products are pre-placed manually at the box conveying mechanism, which transports them one by one to the infeed box transfer mechanism. The infeed box transfer mechanism then transfers the delivered boxes to the infeed box transmission mechanism. The loading mechanism lifts the boxes conveyed by the infeed box transmission mechanism, and the loading gripping mechanism picks up the sheet products one by one from the boxes lifted by the loading mechanism and transfers them to the detection moving mechanism. The detection moving mechanism then conveys the transferred sheet products through… The sheet products are first captured by the image capture and inspection system, then conveyed to the unloading and gripping mechanism. The image capture and inspection system captures images of the sheet products passing through it and uses its pre-stored image recognition program to identify defects, sending a conclusion on whether the sheet products are qualified or not to the control system. The unloading and gripping mechanism, under the control of the control system, picks up the sheet products and places qualified products into the material box on the unloading mechanism. Unqualified products are placed into the NG (Not Qualified) paper storage mechanism. At this point, the inspection of one sheet product is complete. After all the sheet products in the material box held by the loading mechanism have been inspected, the material box held by the loading mechanism is empty, while the material box on the unloading mechanism is full of sheet products. At this point, the unloading machine... The device moves the material box filled with sheet products to the discharge material box transfer mechanism. The discharge material box transfer mechanism then transfers the material box to the full material box discharge mechanism for storage, awaiting retrieval by staff. Simultaneously, the feeding mechanism descends, causing the feeding box to fall onto the feeding box transmission mechanism. The feeding box transmission mechanism then transfers the feeding box to the empty material box storage mechanism for storage. Thus, the automatic surface defect detection equipment of this invention can detect surface defects in sheet products without removing the entire stack of sheet products from the material box. This eliminates the need for manual re-placement of qualified sheet products into the material box, preventing secondary damage. This automatic surface defect detection equipment for sheet products with a material box has high detection efficiency and low labor costs. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A perspective view of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention;

[0017] Figure 2 A partial structure of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention Figure 1 ;

[0018] Figure 3 A partial structure of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention Figure 2 ;

[0019] Figure 4 A perspective view of a material box conveying mechanism of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention Figure 1 ;

[0020] Figure 2 A perspective view of a drawer conveying mechanism of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention Figure 6 ;

[0021] Figure 1 A perspective view of a material box in-transit mechanism of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention Figure 7 ;

[0022] Figure 2 A perspective view of a coupling mechanism of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention Figure 8 ;

[0023] Figure 9 A perspective view of a empty material box storage mechanism of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention;

[0024] Figure 10 A perspective view of a detection moving mechanism of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention;

[0025] Figure 11 A partial perspective view of a detection moving mechanism of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention;

[0026] Figure 12 A perspective view of a first material pressing head assembly of a detection moving mechanism of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention;

[0027] Figures 1 to 3 An exploded view of a first material pressing head assembly of a detection moving mechanism of a surface defect automatic detection apparatus for a sheet product with a material box according to the present invention. DETAILED DESCRIPTION

[0028] The application is further described in detail by the following examples with reference to the accompanying drawings.

[0029] Example 1 : As Figure 4As shown, a kind of surface defect automatic detection equipment of sheet product with material box includes material box conveying mechanism 1, feed material box transfer mechanism 2, feeding mechanism 3, feeding grabbing mechanism 4, feed box transmission mechanism 5, empty material box storage mechanism 6, image shooting detection system 7, control system, detection moving mechanism 8, unloading mechanism 9, discharge grabbing mechanism 10, discharge storage mechanism 11, full material box discharge mechanism 12, NG paper storage mechanism 13 and discharge material box transfer mechanism 14, control system is connected with material box conveying mechanism 1, feed material box transfer mechanism 2, feeding mechanism 3, feeding grabbing mechanism 4, feed box transmission mechanism 5, empty material box storage mechanism 6, image shooting detection system 7, detection moving mechanism 8, unloading mechanism 9, discharge grabbing mechanism 10, discharge storage mechanism 11, full material box discharge mechanism 12, NG paper storage mechanism 13 and discharge material box transfer mechanism 14 respectively, control system is used to control material box conveying mechanism 1, feed material box transfer mechanism 2, feeding mechanism 3, feeding grabbing mechanism 4, feed box transmission mechanism 5, empty material box storage mechanism 6, image shooting detection system 7, detection moving mechanism 8, unloading mechanism 9, discharge grabbing mechanism 10, discharge storage mechanism 11, full material box discharge mechanism 12, NG paper storage mechanism 13 and discharge material box transfer mechanism 14 work cooperatively;Feed material box transfer mechanism 2 is arranged at the back of material box conveying mechanism 1, feeding mechanism 3 is arranged at the back of feed material box transfer mechanism 2, feeding grabbing mechanism 4 is arranged at the upper side of feeding mechanism 3, feed box transmission mechanism 5 is arranged at the back of feeding mechanism 3, image shooting detection system 7 is arranged at the left side or right side of feeding grabbing mechanism 4, detection moving mechanism 8 is arranged at the back of feeding grabbing mechanism 4, empty material box storage mechanism 6 is arranged at the back of detection moving mechanism 8, discharge grabbing mechanism 10 is arranged at one side of image shooting detection system 7, unloading mechanism 9 is located at the lower side of discharge grabbing mechanism 10, discharge storage mechanism 11 is arranged at the front side of unloading mechanism 9, full material box discharge mechanism 12 is arranged at the lower side of discharge storage mechanism 11, NG paper storage mechanism 13 is arranged at the back of discharge storage mechanism 11, and discharge material box transfer mechanism 14 is arranged at the front side of unloading mechanism 9.The empty box is placed in the discharge storage mechanism 11 by manual operation in advance, the discharge storage mechanism 11 is used to transfer the box placed there to the discharging mechanism 9 in sequence, the box filled with sheet products is placed in the box conveying mechanism 1 by manual operation in advance, the box conveying mechanism 1 is used to convey the box placed there to the feeding box transfer mechanism 2 one by one, the feeding box transfer mechanism 2 is used to transfer the box conveyed there to the feeding box driving mechanism 5, the feeding mechanism 3 is used to hold up the box conveyed on the feeding box driving mechanism 5, the feeding and grabbing mechanism 4 is used to grab the sheet products in the box held up by the feeding mechanism 3 one by one and then transfer them to the detection moving mechanism 8, the detection moving mechanism 8 is used to convey the sheet products transferred there first through the image shooting detection system 7 and then to the discharging grabbing mechanism 10, the image shooting detection system 7 is used to shoot the image of the sheet products passing through it and identify the defects by the image recognition program stored in it, and then send the conclusion of whether the sheet products are qualified or not to the control system, the discharging grabbing mechanism 10 is used to grab the sheet products conveyed there under the control of the control system, and put the sheet products determined as qualified products into the box on the discharging mechanism 9, and put the sheet products determined as unqualified products into the NG paper storage mechanism 13, at this time, the detection of one sheet product is completed, after the detection of the sheet products in the box held up by the feeding mechanism 3 is completed, the box held up by the feeding mechanism 3 is empty, the box on the discharging mechanism 9 is filled with sheet products, at this time, the discharging mechanism 9 moves the box filled with sheet products on it to the discharge box transfer mechanism 14, the discharge box transfer mechanism 14 transfers the box moved there to the full box discharging mechanism 12 for storage, waiting for the staff to take it away, at the same time, the feeding mechanism 3 is lowered, so that the box falls on the feeding box driving mechanism 5, and the feeding box driving mechanism 5 transfers the box on it to the empty box storage mechanism 6 for storage.

[0030] In the embodiment, as shown in Figure 6 and 5As shown, the material box conveying mechanism 1 comprises two side plates 15, a first bottom plate 16, a top plate 17, n drawer conveying mechanisms 19, n first sensors 20 for detecting whether the material is empty and a signal alarm lamp 21, n is an integer greater than or equal to 2, the n first sensors 20 and the signal alarm lamp 21 are connected with the control system respectively, the two side plates 15 are fixed on the left and right sides of the first bottom plate 16 respectively, the top plate 17 is fixed above the two side plates 15, the two side plates 15, the first bottom plate 16 and the top plate 17 enclose a front-to-back through material conveying channel, the n drawer conveying mechanisms 19 are arranged in n layers from top to bottom in the material conveying channel, the n first sensors 20 are installed one by one at the rear end of the n drawer conveying mechanisms 19, and the signal alarm lamp 21 is installed at the left end of any one of the side plates 15; before the material box conveying mechanism 1 starts to work, the worker places the material boxes filled with sheet products on the n drawer conveying mechanisms 19, and the material boxes on each drawer conveying mechanism 19 are arranged in order from front to back until the front end of the first sensor 20 arranged at the rear end; after the material box conveying mechanism 1 starts to work, the control system controls the n drawer conveying mechanisms 19 to work in order from top to bottom, first controls the feeding material box transfer mechanism 2 to ascend and align with a certain layer of drawer conveying mechanism 19 which is currently working, then transfers the material boxes on the drawer conveying mechanism 19 to the feeding material box transfer mechanism 2, when the material boxes on a certain layer of drawer conveying mechanism 19 are conveyed, there will be no material boxes passing through the first sensor 20 installed on the drawer conveying mechanism 19, at this time, the first sensor 20 installed on the drawer conveying mechanism 19 cannot sense the passing of the material box, generates a signal representing empty material and sends it to the control system, the control system judges that the drawer conveying mechanism 19 has completed the conveying after receiving the signal representing empty material for a preset time (20 seconds), at this time, the control system controls the drawer conveying mechanism 19 to stop working, then controls the feeding material box transfer mechanism 2 to descend to be connected with the next layer of drawer conveying mechanism 19, and controls the next layer of drawer conveying mechanism 19 to start the conveying work, and transfers the material boxes to the feeding material box transfer mechanism 2, until the control system judges that the lowest layer of drawer conveying mechanism 19 has completed the conveying, at this time, the control system controls the signal alarm lamp 21 to alarm and reminds the worker to refill.Each drawer conveying mechanism 19 comprises two slide rails 22, a drawer reference plate 23, a first belt conveying mechanism 24, a transmission wheel 25, a main transmission shaft 26, a drawer panel 27, a first bevel gear 28 and a second bevel gear 29. The two slide rails 22 are installed on the two side plates 15 one by one and can move forward and backward relative to the two side plates 15. The drawer reference plate 23 is fixed on the two slide rails 22. The first belt conveying mechanism 24 is located above the drawer reference plate 23 and is fixed on the drawer reference plate 23. The first belt conveying mechanism 24 is not powered by itself. The main transmission shaft 26 is located on the left side of the first belt conveying mechanism 24 and is installed on the first belt conveying mechanism 24. The transmission wheel 25 is fixed on the rear end of the main transmission shaft 26. A groove 251 is arranged on the rear end face of the transmission wheel 25. The first bevel gear 28 is fixed on the front end of the main transmission shaft 26. The second bevel gear 29 is fixed on the first belt conveying mechanism 24. The first bevel gear 28 and the second bevel gear 29 are in mesh with each other and form a 90-degree angle. The drawer panel 27 is fixed on the front end of the drawer reference plate 23. When the workers put the materials, they only need to pull the drawer panel 27 forward. At this time, the drawer panel 27 will drive the drawer reference plate 23 and the two slide rails 22 to move forward. The first belt conveying mechanism 24 also moves forward with the drawer reference plate 23. The workers put the material boxes on the first belt conveying mechanism 24 in turn until they are placed in front of the first sensor 20 on the drawer conveying mechanism 19. When the material boxes are placed, the drawer panel 27 is pushed backward. The drawer reference plate 23 and the two slide rails 22 also move backward. The first belt conveying mechanism 24 moves backward with the drawer reference plate 23. When it moves to the initial position of the two slide rails 22, it stops moving. The feeding of the drawer conveying mechanism 19 is completed. Since the first belt conveying mechanism 24 is not powered by itself, the material boxes on the first belt conveying mechanism 24 remain stationary without external power driving the first belt conveying mechanism 24. When the control system controls the material boxes on the drawer conveying mechanism 19 to flow to the feeding material box transfer mechanism 2, the control system controls the external power to be transmitted to the transmission wheel 25 of the drawer conveying mechanism 19 at this time. The transmission wheel 25 drives the main transmission shaft 26 to rotate. The first bevel gear 28 also rotates with the main transmission shaft 26. Since the first bevel gear 28 and the second bevel gear 29 are in mesh with each other, the second bevel gear 29 also rotates. The second bevel gear 29 is connected with the first belt conveying mechanism 24. At this time, the first belt conveying mechanism 24 starts the conveying work under the driving of the external power and sends the material boxes on it from front to back to the feeding material box transfer mechanism 2.

[0031] In the embodiment, as shown in Figure 8 and 7As shown, the feeding box transfer mechanism 2 comprises a lifting mechanism 30, a lifting bottom plate 31, a second belt conveying mechanism 32, a first guide plate 33, a blocking mechanism 34, a top mechanism 35, a second sensor 36 and a shaft coupling transmission mechanism, the lifting mechanism 30, the second belt conveying mechanism 32, the blocking mechanism 34, the top mechanism 35, the second sensor 36 and the shaft coupling transmission mechanism are connected with the control system respectively, the lifting bottom plate 31 is fixed on the lifting mechanism 30, the second belt conveying mechanism 32 is fixed on the lifting bottom plate 31, the lifting mechanism 30 is used for driving the lifting bottom plate 31 to lift under the control of the control system, so that the second belt conveying mechanism 32 is aligned with the first belt conveying mechanism 24 of the drawer conveying mechanism 19 of a certain layer which needs to carry out the feeding box conveying work in the feeding box conveying mechanism 1, the first guide plate 33 is fixed on the side of the second belt conveying mechanism 32, when the feeding box conveyed to the second belt conveying mechanism 32 is inclined and contacted with the first guide plate 33, the first guide plate 33 makes the feeding box of the second belt conveying mechanism 32 adjust to the preset orientation;The second sensor 36, the material lifting mechanism 35 and the material blocking mechanism 34 are respectively installed on the lifting base plate 31, the material lifting mechanism 35 is located at the rear side of the second sensor 36, the material blocking mechanism 34 is located at the rear side of the material lifting mechanism 35, the coupling transmission mechanism is fixed on the lifting base plate 31 and located at the outer side of the second belt conveying mechanism 32, when the feeding material box transfer mechanism 2 is working, the second belt conveying mechanism 32 is aligned with the drawer conveying mechanism 19 of a certain layer of the material box conveying mechanism 1 which needs to perform the material box conveying work under the control of the control system, the coupling transmission mechanism is used to provide power for the first belt conveying mechanism 24 of the drawer conveying mechanism 19 of a certain layer of the material box conveying mechanism 1 which needs to perform the material box conveying work, drives the first belt conveying mechanism 24 of the drawer conveying mechanism 19 to rotate forward or reversely, when the coupling transmission mechanism drives the first belt conveying mechanism 24 of the drawer conveying mechanism 19 of a certain layer which needs to perform the material box conveying work to rotate forward, the first belt conveying mechanism 24 conveys the material box therefrom from front to back and sends the material box into the second belt conveying mechanism 32, the second belt conveying mechanism 32 also rotates forward to convey the material box therefrom from front to back under the control of the control system, the second sensor 36 is used to sense whether there is a material box on the second belt conveying mechanism 32, when the second belt conveying mechanism 32 conveys the material box to the second sensor 36, the second sensor 36 senses the material box and sends a signal representing the material box to the control system, the control system first controls the material blocking mechanism 34 to lift and block the material box, then controls the material lifting mechanism 35 to lift the material box, then the control system controls the second belt conveying mechanism 32 and the coupling transmission mechanism to reversely rotate, at this time, the remaining material boxes on the second belt conveying mechanism 32 are conveyed from back to front and sent back to the first belt conveying mechanism 24 of the drawer conveying mechanism 19 of a certain layer which is aligned with the second belt conveying mechanism 32 from back to front, when the remaining material boxes on the second belt conveying mechanism 32 are all sent back, the control system first controls the second belt conveying mechanism 32 and the coupling transmission mechanism to stop working, at this time, the first belt conveying mechanism 24 of the drawer conveying mechanism 19 of a certain layer which is aligned with the second belt conveying mechanism 32 also stops rotating, then the material lifting mechanism 35 and the material blocking mechanism 34 are reset, the material box on the material lifting mechanism 35 falls onto the second belt conveying mechanism 32 again, at this time, the control system controls the second belt conveying mechanism 32 to rotate forward to send the material box onto the feeding material box transmission mechanism 5, when the control system controls the material lifting mechanism 3 to lift the material box conveyed on the feeding material box transmission mechanism 5, the control system controls the coupling transmission mechanism to provide forward power for the first belt conveying mechanism 24 of the drawer conveying mechanism 19 of the material box conveying mechanism 1 which performs the material box conveying work, so that the first belt conveying mechanism 24 conveys the material box therefrom from front to back and continuously sends the material box into the second belt conveying mechanism 32, the second belt conveying mechanism 32 again conveys the material box therefrom to start the transfer of the next material box, and the process is repeated.

[0032] The coupling transmission mechanism includes two air cylinders 37, a servo motor 38, two stretching blocks 39, two springs 40, a coupling block 41, a coupling piece 42 and a rotating disc 43. The servo motor 38 is fixed outside the lifting base plate 31, the two air cylinders 37 are fixed on the upper and lower sides of the servo motor 38 respectively, the two stretching blocks 39 are fixed on the guide rods of the two air cylinders 37 one by one, the guide rods of the two air cylinders 37 are on the same side of the rotating shaft of the servo motor 38, the coupling piece 42, the rotating disc 43 and the coupling block 41 are fixed coaxially on the rotating shaft of the servo motor 38 in the order from back to front, two recessed holes 44 are arranged on the front end face of the coupling piece 42, the two recessed holes 44 are on the same side of the rotating shaft of the servo motor 38, the rear parts of the two springs 40 are embedded in the two recessed holes 44 one by one, and the rear ends of the two springs 40 abut against the bottoms of the two recessed holes 44, two first round pins are fixedly arranged on the rear end face of the rotating disc 43, the two first round pins are inserted in the two springs 40 one by one, two second round pins 46 are fixedly arranged on the front end face of the rotating disc 43, the two second round pins 46 are on the same side of the rotating shaft of the servo motor 38, the coupling block 41 is provided with two front-rear penetrating guide holes, the two second round pins 46 are inserted in the two guide holes 47 one by one, the two stretching blocks 39 hold the rotating disc 43, in the initial state, the guide rods of the two air cylinders 37 are in the retracted state, the two stretching blocks 39 pull the rotating disc 43 back, at the moment, the two springs 40 are compressed by the stretching blocks, the two second round pins 46 on the rotating disc 43 move backward, and the front ends are located inside the two guide holes 47, when the coupling transmission mechanism provides power for the drawer conveying mechanism 19 of a layer of the magazine conveying mechanism 1 which needs to convey the magazines, the control system controls the guide rods of the two air cylinders 37 to stretch out, due to the elastic force of the two springs 40, the rotating disc 43 is bounced back to the original position, the two second round pins 46 on the rotating disc 43 stretch out from the front ends of the two guide holes 47, at the moment, the two second round pins 46 are inserted into the grooves 251 of the transmission wheels 25 of the drawer conveying mechanism 19 of a layer of the magazine conveying mechanism 1 which needs to convey the magazines, the servo motor 38 starts to rotate under the control of the control system, drives the rotating disc 43 to rotate, the two second round pins 46 on the rotating disc 43 also rotate, and drive the transmission wheels 25 of the drawer conveying mechanism 19 of a layer of the magazine conveying mechanism 1 which needs to convey the magazines to rotate synchronously, thereby driving the first belt conveying mechanism 24 of the drawer conveying mechanism 19 to rotate, if the servo motor 38 rotates forward, at the moment, the first belt conveying mechanism 24 of the drawer conveying mechanism 19 conveys the magazines thereon from front to back to the second belt conveying mechanism 32, if the servo motor 38 rotates reversely, the first belt conveying mechanism 24 of the drawer conveying mechanism 19 conveys the magazines thereon from back to front.

[0033] In this embodiment, as Figures 9 to 12As shown, the empty box storage mechanism 6 comprises a support plate 48, two linear guides, a lead screw 49, an adjusting hand wheel 50, two fixed plates, two guide strips, two guide plates, a guide piece 51, a third sensor 52 for sensing the box, and a storage mechanism. The third sensor 52 is connected with the control system, the support plate 48 is installed on the rear side of the detection moving mechanism 8, the two linear guides are located on the left side of the support plate 48, both of which are fixed on the support plate 48 and are distributed vertically, both of which are arranged in parallel along the front and rear directions, the lead screw 49 is located in the middle of the two linear guides and is fixed on the support plate 48, the axial direction of the lead screw 49 is along the front and rear directions, the adjusting hand wheel 50 is fixed on the front end of the lead screw 49, the two linear guides are respectively called the first linear guide 53 and the second linear guide 54, the first linear guide 53 is provided with the first sliding block 55 and the second sliding block 56, the first sliding block 55 is located on the front side of the second sliding block 56, and the first sliding block 55 and the second sliding block 56 can move forward and backward along the first linear guide 53 under the action of force, the second linear guide 54 is provided with the third sliding block 57 and the fourth sliding block 58, the third sliding block 57 is located on the front side of the fourth sliding block 58, and the third sliding block 57 and the fourth sliding block 58 can move forward and backward along the second linear guide 54 under the action of force, the first sliding block 55 is opposite to the third sliding block 57, and the second sliding block 56 is opposite to the fourth sliding block 58, the two fixed plates are respectively called the first fixed plate 59 and the second fixed plate 60, the first fixed plate 59 is arranged between the first sliding block 55 and the third sliding block 57, and is fixedly connected with the first sliding block 55 and the third sliding block 57 respectively, the second fixed plate 60 is arranged between the second sliding block 56 and the fourth sliding block 58, and is fixedly connected with the second sliding block 56 and the fourth sliding block 58 respectively, the front end of the lead screw 49 penetrates through the first fixed plate 59, and the lead screw 49 is in threaded connection with the first fixed plate 59, the second fixed plate 60 is fixed with the support plate 48, the two guide strips are respectively called the first guide strip 61 and the second guide strip 62, the first guide strip 61 is located on the left side of the first fixed plate 59 and is fixedly connected with the first fixed plate 59, the second guide strip 62 is located on the left side of the second fixed plate 60 and is fixedly connected with the second fixed plate 60, the left ends of the first guide strip 61 and the second guide strip 62 are aligned forward and backward, the two guide plates are respectively called the second guide plate 63 and the third guide plate 64, the second guide plate 63 is located on the left side of the first fixed plate 59 and is fixedly connected with the first fixed plate 59, the third guide plate 64 is located on the left side of the second fixed plate 60 and is fixedly connected with the second fixed plate 60, a vertically penetrating storage channel 65 is formed between the first guide strip 61, the second guide plate 63, the second guide strip 62 and the third guide plate 64, the distance between the second guide plate 63 and the third guide plate 64 corresponds to the width of the storage channel 65, the guide piece 51 is arranged on the left side of the two guide plates and its left and right positions can be adjusted, the distance between the guide piece 51 and the left ends of the two guide strips corresponds to the length of the storage channel 65,The third sensor 52 is mounted on the bottom surface of the support plate 48 to sense whether there is a material box. The material storage mechanism includes two sets of needle cylinders, each set consisting of n needle cylinders, where n is an integer greater than or equal to 3. The two sets of needle cylinders are referred to as the first set of needle cylinders 66 and the second set of needle cylinders 67. The first set of needle cylinders 66 is mounted on the lower front side of the second guide plate 63, and the n needle cylinders of the first set of needle cylinders 66 are arranged in a row with intervals from right to left. The guide rods of the n needle cylinders of the first set of needle cylinders 66 are all set to the rear. The second set of needle cylinders 67 is mounted on the lower rear side of the third guide plate 64, and the n needle cylinders of the second set of needle cylinders 67 are arranged in a row with intervals from right to left. The guide rods of the n needle-type cylinders of the type cylinder 67 are all set forward. In the default state, the guide rods of the n needle-type cylinders of the first group of needle-type cylinders 66 and the n needle-type cylinders of the second group of needle-type cylinders 67 are all extended and extend below the storage channel 65. The guide rods of the n needle-type cylinders of the first group of needle-type cylinders 66 and the n needle-type cylinders of the second group of needle-type cylinders 67 are aligned one-to-one. At this time, the storage channel 65 is blocked. Before using the empty material box storage mechanism 6, the positions of the first guide bar 61, the second guide plate 63, the second guide bar 62 and the third guide plate 64 need to be adjusted so that the width of the storage channel 65 matches the width of the material box. The operator first drives the lead screw 49 to rotate by adjusting the adjusting handwheel 50. At this time, the first The fixed plate 59 moves along the screw axis, driving the first slider 55 and the third slider 57 to move synchronously. The first guide bar 61 and the second guide plate 63 also move accordingly, changing the width of the storage channel 65 to match the width of the material box. Then, the left and right positions of the guide 51 are manually adjusted to change the distance between the guide 51 and the left ends of the two guide bars, so that the length of the storage channel 65 matches the length of the material box. When the feeding box transmission mechanism 5 transfers its loaded box to the empty box storage mechanism 6 for storage, the material box on the feeding box transmission mechanism 5 is located directly below the storage channel 65. The control system controls the feeding box transmission mechanism 5 to lift its loaded box upward. During the upward movement of the material box, the third sensor 52 first senses the material box and sends a signal indicating that a material box has passed by. The signal is sent to the control system, which then controls the guide rods of n needle cylinders in the first group of needle cylinders 66 and n needle cylinders in the second group of needle cylinders 67 to retract synchronously. At this time, the storage channel 65 is opened, and the material box continues to move upward into the storage channel 65. After the third sensor 52 no longer detects the material box for 2 seconds, the control system first controls the guide rods of n needle cylinders in the first group of needle cylinders 66 and n needle cylinders in the second group of needle cylinders 67 to extend synchronously. Then, it controls the feeding box transmission mechanism 5 to drive the feeding box downward. When the material box falls onto the guide rods of the n needle cylinders in the first group of needle cylinders 66 and n needle cylinders in the second group of needle cylinders 67, the feeding box transmission mechanism 5 continues to descend to its reset position.The material box is supported by the guide rods of the n needle cylinders of the first group of needle cylinders 66 and the guide rods of the n needle cylinders of the second group of needle cylinders 67. When the next material box is lifted by the material box feeding mechanism 5, the third sensor 52 senses the arrival of the next material box and sends a signal to the control system. The control system controls the guide rods of the n needle cylinders of the first group of needle cylinders 66 and the n needle cylinders of the second group of needle cylinders 67 to retract again. At this time, the previous material box on the guide rods of the n needle cylinders of the first group of needle cylinders 66 and the n needle cylinders of the second group of needle cylinders 67 falls and is stacked on the next material box. The next material box moves upward together until the third sensor 52 does not sense the material box for 2 seconds. The control system controls the guide rods of the n needle cylinders of the first group of needle cylinders 66 and the n needle cylinders of the second group of needle cylinders 67 to extend synchronously, and then controls the material box feeding mechanism 5 to lower the stacked material box. When the stacked material box falls on the guide rods of the n needle cylinders of the first group of needle cylinders 66 and the n needle cylinders of the second group of needle cylinders 67, the material box feeding mechanism 5 continues to descend to the reset position. The stacked material box is supported by the guide rods of the n needle cylinders of the first group of needle cylinders 66 and the guide rods of the n needle cylinders of the second group of needle cylinders 67 again. The operation is repeated until the material box is full. The material box is taken away by hand.

[0034] In this embodiment, as ​As shown, the detection moving mechanism 8 comprises a moving sliding table 68, a main supporting plate 69, a supporting assembly, a driving assembly and a pressing assembly, the main supporting plate 69 is installed on the moving sliding table 68, the moving sliding table 68 is connected with the control system, the main supporting plate 69 is provided with a hollow slot 70 penetrating from top to bottom, the supporting assembly comprises two linear guides, two supporting strips and four sliding blocks, the two linear guides are respectively referred to as a third linear guide 71 and a fourth linear guide 72, the two supporting strips are respectively referred to as a first supporting strip 73 and a second supporting strip 74, and the four sliding blocks are respectively referred to as a fifth sliding block 75, a sixth sliding block 76, a seventh sliding block 77 and an eighth sliding block 78, the third linear guide 71 is arranged along the left-right direction and is fixed at the front end of the main supporting plate 69, the fourth linear guide 72 is arranged along the left-right direction and is fixed at the rear end of the main supporting plate 69, the fifth sliding block 75 and the sixth sliding block 76 are installed on the third linear guide 71 and can move left and right under stress along the third linear guide 71, the fifth sliding block 75 is located at the left side of the sixth sliding block 76, the seventh sliding block 77 and the eighth sliding block 78 are installed on the fourth linear guide 72 and can move left and right under stress along the fourth linear guide 72, the seventh sliding block 77 is located at the left side of the eighth sliding block 78; the first supporting strip 73 and the second supporting strip 74 are arranged at intervals along the left-right direction, the first supporting strip 73 is located at the left side of the second supporting strip 74, the first supporting strip 73 is parallel to the second supporting strip 74, the two ends of the first supporting strip 73 are fixedly connected with the fifth sliding block 75 and the seventh sliding block 77 respectively, the two ends of the second supporting strip 74 are fixedly connected with the sixth sliding block 76 and the eighth sliding block 78 respectively, and the first supporting strip 73 and the second supporting strip 74 are perpendicular to the third linear guide 71 and the fourth linear guide 72; the hollow slot 70 is located between the first supporting strip 73 and the second supporting strip 74; the driving assembly is used for driving the first supporting strip 73 and the second supporting strip 74 to move towards each other or in the opposite direction, so as to adjust the distance between the first supporting strip 73 and the second supporting strip 74; the pressing assembly comprises m first pressing head assemblies 95 and m second pressing head assemblies 96, m is an integer greater than or equal to 4, the m first pressing head assemblies 95 are installed at intervals on the first supporting strip 73, and the m second pressing head assemblies 96 are installed at intervals on the second supporting strip 74, the m first pressing head assemblies 95 are used for pressing the left side edge of the sheet product, and the m second pressing head assemblies 96 are used for pressing the right side edge of the sheet product.

[0035] In the embodiment, each first pressing head assembly 95 comprises a cylinder fixing piece 79, a first needle cylinder 80, a first spring 81, a second spring 82, a pressing head 83 and a first pin shaft 86, the cylinder fixing piece 79 is installed on the first supporting strip 73, the cylinder fixing piece 79 is provided with a through hole 87 penetrating left and right, the first needle cylinder 80 is connected with the control system, the first needle cylinder 80 is installed on the left side of the cylinder fixing piece 79, the needle part of the first needle cylinder 80 is located in the through hole 87 and can extend out of the through hole 87, the first spring 81 and the second spring 82 are respectively located on the front and back sides of the cylinder fixing piece 79, the axial directions of the first spring 81 and the second spring 82 are the same as the axial direction of the through hole 87, the left ends of the first spring 81 and the second spring 82 are respectively fixed on the cylinder fixing piece 79, the pressing head 83 comprises a connecting block 88 and a pressing block 89, the bottom of the connecting block 88 is installed on the first supporting strip 73 through a rotating shaft 91, the axial direction of the rotating shaft 91 is the front and back direction, the pressing block 89 is located on the right side of the connecting block 88, the pressing block 89 is fixed on the upper part of the connecting block 88, the bottom of the pressing block 89 is a plane, the first pin shaft 86 is fixed on the connecting block 88, the axial direction of the first pin shaft 86 is perpendicular to the axial direction of the through hole 87, the right ends of the first spring 81 and the second spring 82 are respectively fixed on the first pin shaft 86, the lower part of the connecting block 88 is provided with a guide slot 93 penetrating left and right, the right side of the cylinder fixing piece 79 is fixed with a guide block 92, the guide block 92 is inserted into the guide slot 93, in the initial state, the first spring 81 and the second spring 82 are in the compressed state, the connecting block 88 is inclined to the left, when the first spring 81 and the second spring 82 are stretched, the connecting block 88 is perpendicular to the first supporting strip 73, the bottom of the pressing block 89 is on the horizontal plane; m second pressing head assemblies 96 and m first pressing head assemblies 95 correspond one by one, and a corresponding second pressing head assembly 96 and a first pressing head assembly 95 are arranged left and right symmetrically.

[0036] In the embodiment, m first limiting heads 94 are installed on the first supporting strip 73 at intervals, one first pressing head assembly 95 is arranged between every two adjacent first limiting heads 94, the right end surface of each first limiting head 94 is an inclined surface which is inclined upward from right to left, the included angle between the inclined surface and the horizontal plane is 45 degrees, m second limiting heads 98 are installed on the second supporting strip 74 at intervals, one second pressing head assembly 96 is arranged between every two adjacent second limiting heads 98, m second limiting heads 98 and m first limiting heads 94 correspond one by one, and a corresponding second limiting head 98 and a first limiting head 94 are arranged left and right symmetrically.

[0037] In the embodiment, the driving assembly comprises a motor 99, two ball screws, four synchronous pulleys, two synchronous belts and four width adjusting blocks. The two ball screws are referred to as a first ball screw 100 and a second ball screw 101, the four synchronous pulleys are referred to as a first synchronous pulley 102, a second synchronous pulley 103, a third synchronous pulley 104 and a fourth synchronous pulley 105, the two synchronous belts are referred to as a first synchronous belt 106 and a second synchronous belt 107, and the four width adjusting blocks are referred to as a first width adjusting block 108, a second width adjusting block 109, a third width adjusting block 110 and a fourth width adjusting block 111. The first ball screw 100 is installed on the main supporting plate 69 and located at the front side of the third linear guide rail 71, the second ball screw 101 is installed on the main supporting plate 69 and located at the rear side of the fourth linear guide rail 72, the third linear guide rail 71, the fourth linear guide rail 72, the first ball screw 100 and the second ball screw 101 are parallel to each other, the first synchronous pulley 102 is fixed at the right end of the first ball screw 100, the second synchronous pulley 103 is fixed at the right end of the second ball screw 101, the third synchronous pulley 104 and the fourth synchronous pulley 105 are located between the first synchronous pulley 102 and the second synchronous pulley 103, the third synchronous pulley 104 is located at the front side of the fourth synchronous pulley 105, the first synchronous belt 106 is wound around the first synchronous pulley 102 and the third synchronous pulley 104, the second synchronous belt 107 is wound around the second synchronous pulley 103 and the fourth synchronous pulley 105, the motor 99 is installed on the moving slide 68 and located at the right side of the main supporting plate 69, the motor 99 is connected with the control system, the third synchronous pulley 104 and the fourth synchronous pulley 105 are fixedly connected with the output shaft of the motor 99, the first width adjusting block 108 is fixed at the front end of the first supporting strip 73, the second width adjusting block 109 is fixed at the front end of the second supporting strip 74, the third width adjusting block 110 is fixed at the rear end of the first supporting strip 73, the fourth width adjusting block 111 is fixed at the rear end of the second supporting strip 74, the first ball screw 100 passes through the first width adjusting block 108 and the third width adjusting block 110 respectively, the first width adjusting block 108, the third width adjusting block 110 and the first ball screw 100 are in threaded connection, the second ball screw 101 passes through the second width adjusting block 109 and the fourth width adjusting block 111 respectively, and the second width adjusting block 109, the fourth width adjusting block 111 and the second ball screw 101 are in threaded connection.When the motor 99 is running under the control of the control system, the output shaft of the motor 99 drives the third synchronous pulley 104 and the fourth synchronous pulley 105 to rotate synchronously, the third synchronous pulley 104 drives the first synchronous pulley 102 to rotate through the first synchronous belt 106, the first synchronous pulley 102 drives the first ball screw 100 to rotate, the fourth synchronous pulley 105 drives the second synchronous pulley 103 to rotate through the second synchronous belt 107, the second synchronous pulley 103 drives the second ball screw 101 to rotate, the first ball screw 100 and the second ball screw 101 rotate in opposite directions, at this time, the first width adjusting block 108 and the third width adjusting block 110 move left and right along the first ball screw 100, the second width adjusting block 109 and the fourth width adjusting block 111 move left and right along the second ball screw 101, thereby driving the first support bar 73 and the second support bar 74 to move synchronously along the left and right directions relative to the third linear guide rail 71 and the fourth linear guide rail 72, making the first support bar 73 and the second support bar 74 close or away, adjusting the distance between the first support bar 73 and the second support bar 74.

[0038] The working principle of the detection moving mechanism 8 of the embodiment is as follows: before the sheet product is detected, the control system first controls the motor 99 to rotate to drive the third synchronous pulley 104 and the fourth synchronous pulley 105 to synchronously rotate, at this time, the first synchronous belt 106 and the second synchronous belt 107 drive the first synchronous pulley 102 and the second synchronous pulley 103 to rotate, the first synchronous pulley 102 and the second synchronous pulley 103 drive the first ball screw 100 and the second ball screw 101 to synchronously and reversely rotate, the first ball screw 100 and the second ball screw 101 drive the first support strip 73 and the second support strip 74 to move along the left-right direction through the four width adjusting blocks, and the positions of the first support strip 73 and the second support strip 74 are adjusted to the preset positions, so that when the two wide edges of the sheet product are placed on the first support strip 73 and the second support strip 74, the width of about 5 mm is supported by the first support strip 73 and the second support strip 74, and the m first pressing head assemblies 95 and the m second pressing head assemblies 96 are all in the initial state. When the sheet product is conveyed to the detection moving mechanism 8, the sheet product is supported by the first support strip 73 and the second support strip 74, the m first limiting heads 94 and the m second limiting heads 98 limit the sheet product, so that the long edge of the sheet product is in contact with the m first limiting heads 94 and the m second limiting heads 98 respectively, and then the control system controls the first pressing head assembly 95 and the second pressing head assembly 96 to press the sheet product. At this time, the needle part of the first needle type cylinder 80 in the first pressing head assembly 95 extends from the through hole 87 to push the connecting block 88 to rotate to the right, so that the pressing block 89 rotates to the bottom to horizontally press the left long edge of the sheet product. Due to the existence of the first spring 81 and the second spring 82, part of the pushing force of the cylinder in the first pressing head assembly 95 is offset by the first spring 81 and the second spring 82, so that the pressing block 89 can press the left long edge of the sheet product without damaging the left long edge of the sheet product. Similarly, the second pressing head assembly 96 presses the right edge of the sheet product without damaging the right long edge of the sheet product. At this time, the sheet product will sag under the action of gravity, and the control system adjusts the distance between the first support strip 73 and the second support strip 74 through the motor 99 again to tension the sheet product in the width direction, so that the sheet product as a whole remains horizontal without sagging. Then the moving slide table 68 moves at a constant speed under the control of the control system to move the sheet product through the image shooting detection system 7. The image shooting detection system 7 shoots the photos and identifies defects. Since the sheet product is tensioned in the width direction, it will not sag, the long edge direction is pressed by the m first pressing head assemblies 95 and the m second pressing head assemblies 96, and will not shake during rapid movement, thereby greatly reducing the detection error rate and improving the detection efficiency.

Claims

1. A surface defect automatic detection apparatus for sheet products with a tape magazine, characterized by The application relates to a feeding device for a paper feeding machine, which comprises a box conveying mechanism, a feeding box transfer mechanism, a feeding mechanism, a feeding grabbing mechanism, a feeding box transmission mechanism, an empty box storage mechanism, an image shooting detection system, a control system, a detection moving mechanism, a discharging mechanism, a discharging grabbing mechanism, a discharging storage mechanism, a full box discharging mechanism, an NG paper separating storage mechanism and a discharging box transfer mechanism, wherein the control system is connected with the box conveying mechanism, the feeding box transfer mechanism, the feeding mechanism, the feeding grabbing mechanism, the feeding box transmission mechanism, the empty box storage mechanism, the image shooting detection system, the detection moving mechanism, the discharging mechanism, the discharging grabbing mechanism, the discharging storage mechanism, the full box discharging mechanism, the NG paper separating storage mechanism and the discharging box transfer mechanism, and is used for controlling the box conveying mechanism, the feeding box transfer mechanism, the feeding mechanism, the feeding grabbing mechanism, the feeding box transmission mechanism, the empty box storage mechanism, the image shooting detection system, the detection moving mechanism, the discharging mechanism, the discharging grabbing mechanism, the discharging storage mechanism, the full box discharging mechanism, the NG paper separating storage mechanism and the discharging box transfer mechanism to work cooperatively; the feeding box transfer mechanism is arranged at the back side of the box conveying mechanism; the feeding mechanism is arranged at the back side of the feeding box transfer mechanism; the feeding grabbing mechanism is arranged at the upper side of the feeding mechanism; the feeding box transmission mechanism is arranged at the back side of the feeding mechanism; the image shooting detection system is arranged at the left side or the right side of the feeding grabbing mechanism; the detection moving mechanism is arranged at the back side of the feeding grabbing mechanism; the empty box storage mechanism is arranged at the back side of the detection moving mechanism; the discharging grabbing mechanism is arranged at one side of the image shooting detection system; the discharging mechanism is arranged at the lower side of the discharging grabbing mechanism; the discharging storage mechanism is arranged at the front side of the discharging mechanism; the full box discharging mechanism is arranged at the lower side of the discharging storage mechanism; the NG paper separating storage mechanism is arranged at the back side of the discharging storage mechanism; and the discharging box transfer mechanism is arranged at the front side of the discharging mechanism. The empty box is placed in the discharge storage mechanism by manual operation in advance, the discharge storage mechanism is used for transferring the box placed thereon to the discharging mechanism in sequence, the box conveying mechanism is used for conveying the box filled with sheet products to the feeding box transfer mechanism one by one, the feeding box transfer mechanism is used for transferring the box conveyed thereto to the feeding box driving mechanism, the feeding mechanism is used for lifting the box conveyed by the feeding box driving mechanism, the feeding gripping mechanism is used for lifting the sheet product in the box lifted by the feeding mechanism and transferring the sheet product to the detection moving mechanism, the detection moving mechanism is used for conveying the sheet product transferred thereto to the image shooting detection system first, and then conveying the sheet product to the discharging gripping mechanism, the image shooting detection system is used for shooting the image of the sheet product and identifying the defect by the image recognition program stored in the system, obtaining the conclusion of whether the sheet product is qualified or not and sending the conclusion to the control system, the discharging gripping mechanism is used for lifting the sheet product conveyed thereto under the control of the control system, and the sheet product determined as the qualified product is put into the box on the discharging mechanism, and the sheet product determined as the unqualified product is put into the NG separator storage mechanism, at this time, the detection of one sheet product is completed, after the detection of the sheet product in the box lifted by the feeding mechanism is completed, the box lifted by the feeding mechanism is empty, the box on the discharging mechanism is filled with sheet products, at this time, the discharging mechanism moves the box filled with sheet products to the discharge box transfer mechanism, the discharge box transfer mechanism transfers the box moved thereto to the full box discharge mechanism for storage, and waits for the worker to take away, at the same time, the feeding mechanism is lowered, and the box falls on the feeding box driving mechanism, and the feeding box driving mechanism transfers the box to the empty box storage mechanism for storage.

2. The apparatus for automatically detecting surface defects of sheet products with a magazine according to claim 1, characterized in that The material box conveying mechanism comprises two side plates, a first bottom plate, a top plate, n drawer conveying mechanisms, n first sensors for detecting whether the material is empty and a signal alarm lamp, n is an integer greater than or equal to 2, the n first sensors and the signal alarm lamp are connected with the control system respectively, the two side plates are fixed on the left and right sides of the first bottom plate respectively, the top plate is fixed above the two side plates, the two side plates, the first bottom plate and the top plate enclose a front-to-back through material conveying channel, the n drawer conveying mechanisms are arranged in n layers from top to bottom in the material conveying channel, the n first sensors are installed one by one at the rear end of the n drawer conveying mechanisms, and the signal alarm lamp is installed at the left end of any one of the side plates; before the material box conveying mechanism starts to work, workers place material boxes filled with sheet products on the n drawer conveying mechanisms, and the material boxes on each drawer conveying mechanism are arranged in order from front to back until the front end of the first sensor arranged at the rear end; after the material box conveying mechanism starts to work, the control system controls the n drawer conveying mechanisms to work in order from top to bottom, first controls the feeding material box transfer mechanism to ascend and align with a certain layer of drawer conveying mechanism currently working, then transfers the material boxes on the drawer conveying mechanism to the feeding material box transfer mechanism, when the material boxes on a certain layer of drawer conveying mechanism are conveyed, there will be no material boxes passing through the first sensor installed on the drawer conveying mechanism, at this time, the first sensor installed on the drawer conveying mechanism cannot sense the passing of the material boxes, generates a signal representing empty material and sends it to the control system, the control system judges that the drawer conveying mechanism has completed the conveying after receiving the signal representing empty material for a preset time, at this time, the control system controls the drawer conveying mechanism to stop working, then controls the feeding material box transfer mechanism to descend to be connected with the next layer of drawer conveying mechanism, controls the next layer of drawer conveying mechanism to start the conveying work, and transfers the material boxes to the feeding material box transfer mechanism, until the control system judges that the lowest layer of drawer conveying mechanism has completed the conveying, at this time, the control system controls the signal alarm lamp to alarm and reminds the workers to refill.

3. The apparatus for automatically detecting surface defects of sheet products with a sheet material cassette according to claim 2, characterized in that Each drawer conveying mechanism comprises two slide rails, a drawer reference plate, a first belt conveying mechanism, a transmission wheel, a main transmission shaft, a drawer panel, a first bevel gear and a second bevel gear, the two slide rails are installed on the two side plates one by one and can move forward and backward relative to the two side plates, the drawer reference plate is fixed on the two slide rails, the first belt conveying mechanism is located above the drawer reference plate and is fixed on the drawer reference plate, the first belt conveying mechanism has no power by itself, the main transmission shaft is located on the left side of the first belt conveying mechanism and is installed on the first belt conveying mechanism, the transmission wheel is fixed on the rear end of the main transmission shaft, a groove is arranged on the rear end surface of the transmission wheel, the first bevel gear is fixed on the front end of the main transmission shaft, the second bevel gear is fixed on the first belt conveying mechanism, the first bevel gear and the second bevel gear are engaged with each other and form a 90-degree angle, and the drawer panel is fixed on the front end of the drawer reference plate; when the workers put the materials, they only need to pull the drawer panel forward, at this time, the drawer panel will drive the drawer reference plate and the two slide rails to move forward, the first belt conveying mechanism also moves forward with the drawer reference plate, the workers put the material boxes on the first belt conveying mechanism in sequence until the front end of the first sensor on the drawer conveying mechanism, the material boxes are placed, at this time, the drawer panel is pushed back, the drawer reference plate and the two slide rails also move backward, the first belt conveying mechanism moves backward with the drawer reference plate, and stops moving when it moves to the initial position of the two slide rails, and the feeding of the drawer conveying mechanism is completed; since the first belt conveying mechanism has no power by itself, the material boxes remain stationary on the first belt conveying mechanism without external power driving the first belt conveying mechanism, when the control system controls the drawer conveying mechanism of a certain layer to flow the material boxes to the feeding material box transfer mechanism, at this time, the control system controls the external power to be transmitted to the transmission wheel of the drawer conveying mechanism of the layer, the transmission wheel drives the main transmission shaft to rotate, the first bevel gear also rotates with the main transmission shaft, since the first bevel gear and the second bevel gear are engaged with each other, the second bevel gear also rotates, the second bevel gear is connected with the first belt conveying mechanism, at this time, the first belt conveying mechanism starts the conveying work under the driving of the external power and sends the material boxes on it from front to back to the feeding material box transfer mechanism.

4. The apparatus for automatically detecting surface defects of sheet products with a sheet material cassette according to claim 3, characterized in that The feeding magazine transfer mechanism comprises a lifting mechanism, a lifting bottom plate, a second belt conveying mechanism, a first guide plate, a material blocking mechanism, a material lifting mechanism, a second sensor and a shaft coupling transmission mechanism, the lifting mechanism, the second belt conveying mechanism, the material blocking mechanism, the material lifting mechanism, the second sensor and the shaft coupling transmission mechanism are connected with the control system respectively, the lifting bottom plate is fixed on the lifting mechanism, the second belt conveying mechanism is fixed on the lifting bottom plate, the lifting mechanism is used to drive the lifting bottom plate to lift under the control of the control system, so that the second belt conveying mechanism is aligned with the first belt conveying mechanism of a certain layer of drawer conveying mechanism in the magazine conveying mechanism which needs to perform magazine conveying work, the first guide plate is fixed on the side of the second belt conveying mechanism, when the magazine conveyed onto the second belt conveying mechanism is inclined and contacts with the first guide plate, the first guide plate adjusts the orientation of the magazine on the second belt conveying mechanism to a preset orientation, the second sensor, the material lifting mechanism and the material blocking mechanism are respectively installed on the lifting bottom plate, the material lifting mechanism is located at the back side of the second sensor, the material blocking mechanism is located at the back side of the material lifting mechanism, the shaft coupling transmission mechanism is fixed on the lifting bottom plate and located outside the second belt conveying mechanism, when the feeding magazine transfer mechanism works, the second belt conveying mechanism is aligned with a certain layer of drawer conveying mechanism in the magazine conveying mechanism which needs to perform magazine conveying work under the control of the control system, the shaft coupling transmission mechanism is used to provide power for the first belt conveying mechanism of a certain layer of drawer conveying mechanism in the magazine conveying mechanism which needs to perform magazine conveying work, drive the first belt conveying mechanism of the drawer conveying mechanism to rotate forward or reversely, when the shaft coupling transmission mechanism drives the first belt conveying mechanism of a certain layer of drawer conveying mechanism which needs to perform magazine conveying work to rotate forward, the first belt conveying mechanism conveys the magazine thereon from front to back and sends the magazine into the second belt conveying mechanism, the second belt conveying mechanism also rotates forward to convey the magazine thereon from front to back under the control of the control system, the second sensor is used to sense whether there is a magazine on the second belt conveying mechanism, when the second belt conveying mechanism conveys the magazine to the second sensor, the second sensor senses the magazine and sends a signal representing the magazine to the control system, the control system controls the material blocking mechanism to rise and block the magazine first, then controls the material lifting mechanism to lift the magazine, then the control system controls the second belt conveying mechanism and the shaft coupling transmission mechanism to reverse, at this time, the remaining magazine on the second belt conveying mechanism is conveyed from back to front and sent back to the first belt conveying mechanism of a certain layer of drawer conveying mechanism which is aligned with the second belt conveying mechanism from back to front.When all the remaining cartridges on the second belt conveying mechanism are sent back, the control system first controls the second belt conveying mechanism and the shaft coupling transmission mechanism to stop working, at this time the first belt conveying mechanism of the drawer conveying mechanism in the layer aligned with the second belt conveying mechanism also stops rotating, then controls the top material mechanism and the material blocking mechanism to reset, the cartridges on the top material mechanism fall back onto the second belt conveying mechanism, at this time the control system controls the second belt conveying mechanism to rotate forward to send the cartridges onto the cartridge conveying mechanism, when the control system controls the top material mechanism to lift the cartridges conveyed by the cartridge conveying mechanism, the control system controls the shaft coupling transmission mechanism to provide forward power to the first belt conveying mechanism of the drawer conveying mechanism in the cartridge conveying mechanism which is working to convey cartridges, so that the first belt conveying mechanism transmits the cartridges on it from front to back, and continues to send the cartridges into the second belt conveying mechanism, the second belt conveying mechanism again conveys the cartridges into it, and starts the transfer of the next cartridge, and the process repeats.

5. The apparatus for automatically detecting surface defects of sheet products with a sheet material cassette according to claim 4, characterized in that The coupling transmission mechanism includes two cylinders, a servo motor, two stretching blocks, two springs, a coupling block, a coupling piece and a rotating disc, the servo motor is fixed outside the lifting base plate, two cylinders are fixed on the upper and lower sides of the servo motor respectively, two stretching blocks are fixed on the guide rods of the two cylinders one by one, the guide rods of the two cylinders are on the same side of the rotating shaft of the servo motor, the coupling piece, the rotating disc and the coupling block are coaxially fixed on the rotating shaft of the servo motor in the order from back to front, two recesses are arranged on the front end face of the coupling piece and located on the same side of the rotating shaft of the servo motor, the rear parts of two springs are embedded in the two recesses one by one, and the rear ends of the two springs abut against the bottoms of the two recesses, two first column pins are fixed on the rear end face of the rotating disc, the two first column pins are inserted in the two springs one by one, two second column pins are fixed on the front end face of the rotating disc and located on the same side of the rotating shaft of the servo motor, two front and rear through guide holes are arranged on the coupling block, the two second column pins are inserted in the two guide holes one by one, the two stretching blocks clamp the rotating disc, in the initial state, the guide rods of the two cylinders are in the retracted state, the two stretching blocks pull the rotating disc back, at this time, the two springs are compressed by the stretching blocks, the two second column pins on the rotating disc move backward and their front ends are located inside the two guide holes, when the coupling transmission mechanism provides power for a certain layer of drawer conveying mechanism in the cartridge conveying mechanism which needs to carry out cartridge conveying work, the control system controls the guide rods of the two cylinders to extend, the two springs pop the rotating disc back to the original position due to the elastic force of the two springs, the two second column pins on the rotating disc extend from the front ends of the two guide holes at this time, at this time, the two second column pins are inserted in the grooves of the transmission wheels of a certain layer of drawer conveying mechanism in the cartridge conveying mechanism which needs to carry out cartridge conveying work, the servo motor starts to rotate under the control of the control system, drives the rotating disc to rotate, the two second column pins on the rotating disc also rotate and drive the transmission wheels of a certain layer of drawer conveying mechanism in the cartridge conveying mechanism which needs to carry out cartridge conveying work to rotate synchronously, so as to drive the first belt conveying mechanism of the layer of drawer conveying mechanism to rotate, if the servo motor rotates forward, at this time, the first belt conveying mechanism of the layer of drawer conveying mechanism transmits and conveys the cartridges on it from front to back to the second belt conveying mechanism, if the servo motor rotates reversely, the first belt conveying mechanism of the layer of drawer conveying mechanism transmits and conveys the cartridges on it from back to front.

6. The apparatus for automatically detecting surface defects of sheet products with a sheet material cassette according to claim 1, characterized by The empty box storage mechanism comprises a support plate, two linear guides, a lead screw, an adjusting hand wheel, two fixed plates, two guide strips, two guide plates, a guide piece, a third sensor for sensing the box and a storage mechanism, the third sensor is connected with the control system, the support plate is installed on the rear side of the detection moving mechanism, two linear guides are located on the left side of the support plate, both linear guides are fixed on the support plate and are distributed in an upper and lower interval, both linear guides are arranged in parallel along the front and rear directions, the lead screw is located in the middle of the two linear guides and is fixed on the support plate, the axial direction of the lead screw is along the front and rear directions, the adjusting hand wheel is fixed on the front end of the lead screw, the two linear guides are respectively referred to as a first linear guide and a second linear guide, the first linear guide is provided with a first sliding block and a second sliding block, the first sliding block is located on the front side of the second sliding block, the first sliding block and the second sliding block can move forward and backward along the first linear guide under the action of force, the second linear guide is provided with a third sliding block and a fourth sliding block, the third sliding block is located on the front side of the fourth sliding block, the third sliding block and the fourth sliding block can move forward and backward along the second linear guide under the action of force, the first sliding block is opposite to the third sliding block, the second sliding block is opposite to the fourth sliding block, the two fixed plates are respectively referred to as a first fixed plate and a second fixed plate, the first fixed plate is arranged between the first sliding block and the third sliding block, the first fixed plate is fixedly connected with the first sliding block and the third sliding block respectively, the second fixed plate is arranged between the second sliding block and the fourth sliding block, the second fixed plate is fixedly connected with the second sliding block and the fourth sliding block respectively, the front end of the lead screw penetrates through the first fixed plate, the lead screw is in threaded connection with the first fixed plate, the second fixed plate is fixed with the support plate, the two guide strips are respectively referred to as a first guide strip and a second guide strip, the first guide strip is located on the left side of the first fixed plate and is fixedly connected with the first fixed plate, the second guide strip is located on the left side of the second fixed plate and is fixedly connected with the second fixed plate, the left ends of the first guide strip and the second guide strip are aligned in front and back directions, the two guide plates are respectively referred to as a second guide plate and a third guide plate, the second guide plate is located on the left side of the first fixed plate and is fixedly connected with the first fixed plate, the third guide plate is located on the left side of the second fixed plate and is fixedly connected with the second fixed plate, an up and down through storage channel is formed between the first guide strip, the second guide plate, the second guide strip and the third guide plate, the distance between the second guide plate and the third guide plate corresponds to the width of the storage channel, the guide piece is arranged on the left side of the two guide plates and the left and right positions thereof can be adjusted,The distance between the guide and the left end of the two guide strips corresponds to the length of the storage channel, the third sensor is arranged on the bottom surface of the support plate and is used for sensing whether there is a cartridge, the storage mechanism includes two groups of needle type air cylinders, each group of needle type air cylinders is composed of n needle type air cylinders, n is an integer greater than or equal to 3, the two groups of needle type air cylinders are referred to as the first group of needle type air cylinders and the second group of needle type air cylinders, the first group of needle type air cylinders is installed below the front side of the second guide plate, the n needle type air cylinders of the first group of needle type air cylinders are arranged along a column in a spaced manner in sequence from right to left, the guide rods of the n needle type air cylinders of the first group of needle type air cylinders are all arranged rearward, the second group of needle type air cylinders is installed below the rear side of the third guide plate, the n needle type air cylinders of the second group of needle type air cylinders are arranged along a column in a spaced manner in sequence from right to left, the guide rods of the n needle type air cylinders of the second group of needle type air cylinders are all arranged forward, in the default state, the guide rods of the n needle type air cylinders of the first group of needle type air cylinders and the n needle type air cylinders of the second group of needle type air cylinders are all in the extended state and extend below the storage channel, the guide rods of the n needle type air cylinders of the first group of needle type air cylinders and the n needle type air cylinders of the second group of needle type air cylinders are in one-to-one correspondence and are connected, at this time, the storage channel is blocked, before use, the first guide strip, the second guide plate, the second guide strip and the third guide plate need to be adjusted first, so that the width of the storage channel is adjusted to match the width size of the cartridge, the staff first drives the lead screw to rotate by adjusting the adjusting hand wheel, at this time, the first fixed plate moves along the lead screw axis to drive the first slider and the third slider to move synchronously, the first guide strip and the second guide plate also move, the width of the storage channel is changed to match the width of the cartridge, then the left and right positions of the guide are manually adjusted, the distance between the guide and the left end of the two guide strips is changed, so that the length of the storage channel matches the length of the cartridge; when the empty cartridge storage mechanism is used, the empty cartridge storage mechanism is used, the cartridge on the feeding cartridge transmission mechanism is located directly below the storage channel, the control system controls the feeding cartridge transmission mechanism to lift the cartridge upward, in the process of upward movement of the cartridge, the third sensor first senses the cartridge and sends a signal indicating that the cartridge has passed to the control system, the control system controls the guide rods of the n needle type air cylinders of the first group of needle type air cylinders and the n needle type air cylinders of the second group of needle type air cylinders to retract synchronously, at this time, the storage channel is opened, the cartridge continues to move upward into the storage channel, when the third sensor cannot sense the cartridge after a preset time, the control system first controls the guide rods of the n needle type air cylinders of the first group of needle type air cylinders and the n needle type air cylinders of the second group of needle type air cylinders to extend synchronously, then controls the feeding cartridge transmission mechanism to drive the cartridge to descend,When the hopper is lowered to the guide rods of the n needle cylinders of the first group of needle cylinders and the guide rods of the n needle cylinders of the second group of needle cylinders, the said hopper drive mechanism continues to lower to reset, the hopper is supported by the guide rods of the n needle cylinders of the first group of needle cylinders and the guide rods of the n needle cylinders of the second group of needle cylinders, when the next hopper is lifted by the said hopper drive mechanism, the said third sensor senses the arrival of the next hopper and sends a signal to the said control system, the said control system controls the guide rods of the n needle cylinders of the first group of needle cylinders and the n needle cylinders of the second group of needle cylinders to retract again, at this time the previous hopper on the guide rods of the n needle cylinders of the first group of needle cylinders and the n needle cylinders of the second group of needle cylinders falls down and will be stacked on the next hopper, move up with the next hopper, until the said third sensor can't sense the hopper for 2 seconds, the said control system first controls the guide rods of the n needle cylinders of the first group of needle cylinders and the n needle cylinders of the second group of needle cylinders to extend synchronously, and then controls the said hopper drive mechanism to lower the stacked hopper on it, when the stacked hopper falls to the guide rods of the n needle cylinders of the first group of needle cylinders and the guide rods of the n needle cylinders of the second group of needle cylinders, the said hopper drive mechanism continues to lower to reset, the stacked hopper is supported by the guide rods of the n needle cylinders of the first group of needle cylinders and the guide rods of the n needle cylinders of the second group of needle cylinders again, so repeat the operation until the hopper is full, the hopper is taken away by artificial.

7. The apparatus for automatically detecting surface defects of sheet products with a sheet material cassette according to claim 1, characterized by The detection moving mechanism comprises a moving slide, a main supporting plate, a supporting assembly, a driving assembly and a pressing assembly. The main supporting plate is installed on the moving slide, and the moving slide is connected with the control system. A hollow slot is formed in the main supporting plate. The supporting assembly comprises two linear guides, two supporting strips and four sliding blocks. The two linear guides are respectively referred to as a third linear guide and a fourth linear guide. The two supporting strips are respectively referred to as a first supporting strip and a second supporting strip. The four sliding blocks are respectively referred to as a fifth sliding block, a sixth sliding block, a seventh sliding block and an eighth sliding block. The third linear guide is arranged along the left-right direction and is fixed at the front end of the main supporting plate. The fourth linear guide is arranged along the left-right direction and is fixed at the rear end of the main supporting plate. The fifth sliding block and the sixth sliding block are installed on the third linear guide and can move left and right along the third linear guide under stress. The fifth sliding block is located on the left side of the sixth sliding block. The seventh sliding block and the eighth sliding block are installed on the fourth linear guide and can move left and right along the fourth linear guide under stress. The seventh sliding block is located on the left side of the eighth sliding block. The first supporting strip and the second supporting strip are arranged in a left-right interval. The first supporting strip is located on the left side of the second supporting strip. The first supporting strip is parallel to the second supporting strip. The two ends of the first supporting strip are fixedly connected with the fifth sliding block and the seventh sliding block respectively. The two ends of the second supporting strip are fixedly connected with the sixth sliding block and the eighth sliding block respectively. The first supporting strip and the second supporting strip are perpendicular to the third linear guide and the fourth linear guide. The hollow slot is located between the first supporting strip and the second supporting strip. The driving assembly is used for driving the first supporting strip and the second supporting strip to move towards each other or to move in the opposite direction, so as to adjust the distance between the first supporting strip and the second supporting strip. The pressing assembly comprises m first pressing head assemblies and m second pressing head assemblies. m is an integer greater than or equal to 4. The m first pressing head assemblies are installed on the first supporting strip at intervals. The m second pressing head assemblies are installed on the second supporting strip at intervals. The m first pressing head assemblies are used for pressing the left side edge of the sheet product. The m second pressing head assemblies are used for pressing the right side edge of the sheet product.

8. The apparatus for automatically detecting surface defects of sheet products with a sheet material cassette according to claim 7, characterized by Each of the first pressure head assemblies comprises a cylinder fixing part, a first needle cylinder, a first spring, a second spring, a pressure head and a first pin shaft, the cylinder fixing part is mounted on the first support bar, the cylinder fixing part is provided with a through hole penetrating left and right, the first needle cylinder is connected with the control system, the first needle cylinder is mounted on the left side of the cylinder fixing part, the needle part of the first needle cylinder is located in the through hole and can be stretched out from the through hole, the first spring and the second spring are respectively located on the front and back sides of the cylinder fixing part, the axial directions of the first spring and the second spring are the same as the axial direction of the through hole, the left ends of the first spring and the second spring are fixed on the cylinder fixing part, the pressure head comprises a connecting block and a pressing block, the bottom of the connecting block is mounted on the first support bar through a rotating shaft, the axial direction of the rotating shaft is front and back direction, the pressing block is located on the right side of the connecting block, the pressing block is fixed on the upper part of the connecting block, the bottom of the pressing block is a plane, the first pin shaft is fixed on the connecting block, the axial direction of the first pin shaft is perpendicular to the axial direction of the through hole, the right ends of the first spring and the second spring are respectively fixed on the first pin shaft, the lower part of the connecting block is provided with a guide slot penetrating left and right, the right side of the cylinder fixing part is fixed with a guide block, the guide block is inserted into the guide slot, in the initial state, the first spring and the second spring are in the compressed state, the connecting block is inclined to the left, when the first spring and the second spring are stretched, the connecting block is perpendicular to the first support bar, the bottom of the pressing block is on the horizontal plane; the m second pressure head assemblies and the m first pressure head assemblies are one-to-one corresponding, and the corresponding one second pressure head assembly and one first pressure head assembly are arranged left and right symmetrically.

9. The apparatus for automatically detecting surface defects of sheet products with a sheet material cassette according to claim 8, characterized by The first support bar is provided with m first limiting heads at intervals, the m first limiting heads and the m first pressure head assemblies are staggered, the right end surface of each first limiting head is an inclined surface, the inclined surface is inclined upward from right to left, and the included angle between the inclined surface and the horizontal plane is 45 degrees, the second support bar is provided with m second limiting heads at intervals, the m second limiting heads and the m second pressure head assemblies are staggered, and the m second limiting heads and the m first limiting heads are one-to-one corresponding, and the corresponding one second limiting head and one first limiting head are arranged left and right symmetrically.

10. The apparatus for automatically detecting surface defects of sheet products with a sheet material cassette according to claim 7, characterized by The driving assembly comprises a motor, two ball screws, four synchronous pulleys, two synchronous belts and four width adjusting blocks, the two ball screws are respectively called first ball screw and second ball screw, the four synchronous pulleys are respectively called first synchronous pulley, second synchronous pulley, third synchronous pulley and fourth synchronous pulley, the two synchronous belts are respectively called first synchronous belt and second synchronous belt, and the four width adjusting blocks are respectively called first width adjusting block, second width adjusting block, third width adjusting block and fourth width adjusting block, the first ball screw is installed on the main supporting plate and located at the front side of the third linear guide rail, the second ball screw is installed on the main supporting plate and located at the rear side of the fourth linear guide rail, the third linear guide rail, the fourth linear guide rail, the first ball screw and the second ball screw are parallel to each other, the first synchronous pulley is fixed at the right end of the first ball screw, the second synchronous pulley is fixed at the right end of the second ball screw, the third synchronous pulley and the fourth synchronous pulley are located between the first synchronous pulley and the second synchronous pulley, the third synchronous pulley is located at the front side of the fourth synchronous pulley, the first synchronous belt is wound around the first synchronous pulley and the third synchronous pulley, the second synchronous belt is wound around the second synchronous pulley and the fourth synchronous pulley, the motor is installed on the moving sliding table and located at the right side of the main supporting plate, the motor is connected with the control system, the third synchronous pulley and the fourth synchronous pulley are fixedly connected with the output shaft of the motor respectively, the first width adjusting block is fixed at the front end of the first supporting strip, the second width adjusting block is fixed at the front end of the second supporting strip, the third width adjusting block is fixed at the rear end of the first supporting strip, the fourth width adjusting block is fixed at the rear end of the second supporting strip, the first ball screw passes through the first width adjusting block and the third width adjusting block respectively, the first width adjusting block and the third width adjusting block are threadedly connected with the first ball screw, the second ball screw passes through the second width adjusting block and the fourth width adjusting block respectively, the second width adjusting block and the fourth width adjusting block are threadedly connected with the second ball screw.When the motor is running under the control of the control system, the output shaft of the motor drives the third synchronous pulley and the fourth synchronous pulley to rotate synchronously, the third synchronous pulley drives the first synchronous pulley to rotate through the first synchronous belt, the first synchronous pulley drives the first ball screw to rotate, the fourth synchronous pulley drives the second synchronous pulley to rotate through the second synchronous belt, the second synchronous pulley drives the second ball screw to rotate, the first ball screw and the second ball screw rotate in opposite directions, at this time, the first width adjusting block and the third width adjusting block move left and right along the first ball screw, the second width adjusting block and the fourth width adjusting block move left and right along the second ball screw, thereby driving the first support bar and the second support bar to move synchronously relative to the third linear guide rail and the fourth linear guide rail in the left and right directions, so that the first support bar and the second support bar are close or far away, and the distance between the first support bar and the second support bar is adjusted.

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