A CNC automatic loading and unloading equipment

Abstract

This invention discloses an automatic CNC loading and unloading device, including a CNC machining center, a main body of the device located on one side of the CNC machining center, and a safety fence surrounding the CNC machining center and the main body of the device. The top of the main body of the device is divided into a feeding area and a discharging area. The top of the feeding area is provided with a full-load feeding rack and an empty-load feeding rack along the axial direction. The top of the discharging area is provided with a full-load discharging rack and an empty-load discharging rack along the axial direction. Multiple feeding trays are stacked in both the full-load feeding rack and the empty-load discharging rack. Multiple discharging trays are stacked in both the full-load discharging rack and the empty-load discharging rack. By using tray storage, robotic arm loading and unloading, tray discharge and loading, and tray arrangement for unloading, manual loading and unloading is eliminated, avoiding inaccurate positioning due to improper operation by the operator, which could lead to failure to achieve processing accuracy and reducing product scrap rate.

Description

Technical Field

[0001] This invention relates to the field of lens manufacturing equipment technology, specifically a CNC automatic loading and unloading equipment. Background Technology

[0002] Generally, lenses are made of PC resin or PMMA resin. Their shapes are designed according to optical and aesthetic requirements, and then injection molded. Chemical hardening and optical coating processes on the outer surface are used to achieve their optical functions. However, in the plastic part manufacturing process, regardless of injection molding, surface hardening, or optical coating, certain defects will occur at the edges of the product within 1-2mm. These defects include injection molding shrinkage, accumulation of chemical liquids during hardening, and under-coating at the edges during coating. These problems not only damage the appearance of the lens but also cause optical issues such as image distortion, blurring, or even image failure, directly affecting the user experience. Currently, the industry generally chooses to enlarge the edges of the designed optical lens structure by 2-3mm during injection molding. All edge defects caused by injection molding, surface hardening, and surface coating are transferred to the enlarged outer edge. Finally, CNC precision carving is used to remove the enlarged 2-3mm area, resulting in a pre-designed lens without edge defects.

[0003] However, current CNC machining centers require manual handling during loading and unloading, which can easily lead to inaccurate positioning due to operator errors, resulting in failure to achieve machining accuracy and product scrap. This also increases the workload of subsequent quality inspection, resulting in low production efficiency. Furthermore, since lenses are processed in pairs (left and right lenses), two different lenses need to be picked up and placed in the tray at one time. To improve the utilization of tray space, the tray is designed to place two pieces of material horizontally. Therefore, when picking up materials, the two suction cups need to be arranged horizontally to pick up the materials. However, since the processing is based on the angle of the glasses, the two suction cups need to be bent at the corresponding angles when unloading the materials to ensure that the two lenses are attached to the machining fixture without slipping. However, the traditional method of fixing the suction cups with a robotic arm for picking up and unloading materials cannot quickly adjust the angle of the suction cups. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a CNC automatic loading and unloading device, solving the aforementioned technical problems.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a CNC automatic loading and unloading device, comprising a CNC machining center, a device body disposed on one side of the CNC machining center, and a safety fence surrounding the CNC machining center and the device body. The CNC machining center is provided with a support platform for placing materials. A machining tool is disposed directly above the support platform. A tool sensing sensor for detecting the presence or length of the tool is disposed on one side of the machining tool. The top of the device body is divided into a feeding area and a discharging area. A full-tray feeding rack and an empty-tray feeding rack are disposed axially on the top of the feeding area. A full-tray discharging rack and an empty-tray discharging rack are disposed axially on the top of the discharging area. Multiple feeding trays are stacked within both the full-tray feeding rack and the empty-tray discharging rack. Multiple discharging trays are stacked within both the full-tray discharging rack and the empty-tray discharging rack. A tray positioning and moving module is disposed directly below both the feeding area and the discharging area of ​​the device body. A secondary positioning module is provided on the side of the main body of the device near the empty feed tray storage rack. A robot arm is provided between the secondary positioning module and the CNC machining center. A material handling fixture is detachably installed on the robot arm. The material handling fixture includes a mounting base for connecting a robotic arm. A mounting frame is detachably connected to the bottom of the mounting base. Two symmetrical connectors and two symmetrical rotating fixed seats are mounted on the bottom of the mounting frame. A rotating shaft is rotatably mounted inside the rotating fixed seat. A mounting block is connected to the bottom of the rotating shaft. Sliding shafts are slidably arranged on the two mounting blocks and the two connectors. A suction cup is mounted on one end of the sliding shaft, and a vacuum fixing shaft is connected to the other end of the sliding shaft. An adjusting cylinder is detachably connected to the mounting frame. A connecting plate is mounted on the output end of the adjusting cylinder. Two symmetrical L-shaped rotating blocks are rotatably mounted on the connecting plate. The bottom of the L-shaped rotating blocks is fixedly connected to one end of the rotating shaft. The sliding shaft is connected to a guide shaft via a metal sheet at one end near the vacuum fixing shaft. The guide shaft is slidably arranged on the mounting block or connector. A stop block is provided at the end of the guide shaft away from the metal sheet. The diameter of the stop block is larger than the diameter of the guide shaft. A buffer spring is sleeved on the sliding shaft. One end of the buffer spring abuts against the connection between the sliding shaft and the suction cup, and the other end of the buffer spring abuts against the mounting block or connector. The top of the L-shaped rotating block has a movable groove. A cam follower bearing is provided in the movable groove. A rotating shaft is provided on the protruding end of the cam follower bearing. The rotating shaft is rotatably mounted on the connecting plate. A rotating hole is provided through the rotating fixing seat. Two bearings are arranged axially at intervals in the rotating hole. The rotating shaft passes through the two bearings. The feeding full tray storage rack, the feeding empty tray storage rack, the discharging full tray storage rack, and the discharging empty tray storage rack are all equipped with two sets of mutually symmetrical tray fixing mechanisms.

[0006] Preferably, the tray positioning and moving module includes two guide slide rods disposed within the main body of the device. Four limiting sliders arranged in a matrix are slidably arranged on the two guide slide rods. A common moving platform is connected directly above the four limiting sliders by connecting bolts. A groove penetrating the moving platform is opened at the center of the moving platform. A vertically movable lifting plate is arranged in the groove. A lifting and separating cylinder is installed at the bottom of the moving platform by a cylinder bracket. The output end of the lifting and separating cylinder is located directly below the lifting plate and abuts against the bottom surface of the lifting plate.

[0007] Preferably, the material tray positioning and moving module further includes a moving motor and a moving synchronous belt driven by the moving motor, with a transmission component extending downward from the bottom of the moving platform. The transmission component is clamped and fixed on the moving synchronous belt by a bolted abutment block. Anti-slip grooves are provided on the end faces of the transmission component and the abutment block that contact the moving synchronous belt, and the anti-slip grooves on the transmission component and the anti-slip grooves on the abutment block can mesh with each other.

[0008] Preferably, the top of the moving platform is provided with four limiting bars arranged in a matrix. The four limiting bars are respectively set at the top edge of the moving platform, and the four limiting bars enclose a placement area for placing a feed tray or a discharge tray.

[0009] Preferably, the secondary positioning module includes a mounting frame installed on the main body of the device. A positioning platform is provided on the top of the mounting frame. Two mutually symmetrical first positioning references and multiple second positioning references arranged at intervals along the axial direction are detachably connected to the positioning platform. A left and right pushing module is provided at the center of the positioning platform. The left and right pushing module consists of a dual-axis pushing cylinder and a pushing plate installed on the two output ends of the dual-axis pushing cylinder. Two mutually symmetrical front and rear pushing modules are provided on the side of the positioning platform away from the second positioning references. The front and rear pushing modules consist of front and rear pushing cylinders, an L-shaped metal part installed on the output end of the front and rear pushing cylinders, and a pushing rod installed on the L-shaped metal part. The pushing rod and the L-shaped metal part are connected by an adjustable component.

[0010] Preferably, a positioning area for placing materials is formed between the two first positioning references and the plurality of second positioning references.

[0011] Preferably, the material tray fixing mechanism includes mounting brackets installed on the full feed tray storage rack, the empty feed tray storage rack, the full discharge tray storage rack, and the empty discharge tray storage rack. One or two rectangular sliding grooves are provided on the mounting brackets, and sliding blocks are slidably arranged in the rectangular sliding grooves. A support cylinder is installed on the top of the mounting brackets, and the output end of the support cylinder is connected to the sliding blocks through a connecting block. One or two first support grooves and second support grooves adapted to the sliding blocks are provided on both the feed tray and the discharge tray.

[0012] Preferably, the connecting block and the sliding block are connected and fixed by connecting bolts.

[0013] Preferably, the feed tray and the discharge tray are provided with multiple grooves for placing materials, and the multiple grooves are distributed in a matrix.

[0014] Preferably, both the first positioning reference and the second positioning reference are made of rubber, and the first positioning reference and the second positioning reference are fixed to the positioning table by bolts.

[0015] Compared with the prior art, the present invention provides a CNC automatic loading and unloading equipment, which has the following beneficial effects: The present invention uses pallet storage, robotic arm loading and unloading, pallet discharge and loading, and pallet arrangement and unloading to eliminate the need for manual loading and unloading, avoid inaccurate positioning due to improper operation by operators, and thus reduce the product scrap rate. This invention enables large-scale material storage by setting up a full-pan feeding rack, an empty-pan feeding rack, a full-pan discharging rack, and an empty-pan discharging rack, thereby reducing the frequency of material handling by workers and allowing one worker to operate multiple devices, which greatly reduces labor costs.

[0016] This invention, through the setting of a secondary positioning module, allows the robot arm to place the material to be processed from the feed tray into the secondary positioning module after it is removed. The secondary positioning module performs secondary clamping and positioning of the material to be processed. After the secondary clamping and positioning is completed, the robot arm picks up and places the material to be processed into the CNC machining center for fixing and processing. This further reduces the probability of product processing quality abnormalities caused by inaccurate positioning during the clamping and fixing process, and ensures the yield of finished products after material processing.

[0017] When the device of this invention sucks up the material in the tray, the suction cups at the bottom of the two rotating fixed seats suck up the material in the tray in a horizontal position. After sucking up the material, the connecting plate is moved horizontally by the adjusting cylinder, which in turn moves the rotating shaft horizontally and makes the L-shaped rotating block rotate along the rotating fixed seat at a certain angle. This causes the mounting block to rotate the suction cup as a whole at a certain angle, realizing the angle adjustment of the suction cup. At this time, the material can be placed into the CNC machining center for processing through the suction cup after the angle is adjusted. After the material is placed, the above steps are repeated to suck up the material to be processed. After processing, the suction cups at the bottom of the two connecting parts suck up the processed material, and the suction cup at the bottom of the mounting block puts the material to be processed into the processing position. This allows for the simultaneous picking up and placing of 4 lenses, further shortening the operation process and improving work efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2This is a schematic diagram showing the positional structure of the robotic arm and secondary positioning module of the present invention; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the material tray positioning and moving module structure of the present invention; Figure 5 This is a schematic diagram of the secondary positioning module of the present invention; Figure 6 This is a schematic diagram of the discharge tray of the present invention; Figure 7 This is a schematic diagram of the feed tray structure of the present invention; Figure 8 This is a schematic diagram of the CNC machining center of the present invention; Figure 9 This is a schematic diagram of the material handling fixture of the present invention; Figure 10 This is an exploded structural diagram of the material handling fixture of the present invention; Figure 11 This is a schematic diagram of the mounting block, rotating shaft, and guide shaft of the present invention. Figure 12 This is a schematic diagram of the connection structure of the connecting block, mounting frame, and rotating fixing seat of the present invention.

[0019] The components include: 1. CNC machining center; 11. Support platform; 12. Machining tool; 13. Tool sensing sensor; 2. Safety fence; 3. Main body of the device; 31. Full feed tray storage rack; 32. Empty feed tray storage rack; 33. Full discharge tray storage rack; 34. Empty discharge tray storage rack; 35. Feed tray; 351. First support groove; 36. Discharge tray; 361. Second support groove; 37. Device frame; 38. Tray fixing mechanism; 381. Rectangular slide; 382. Sliding block; 383. Support cylinder; 384. Connecting block; 385. Mounting bracket; 4. Robotic arm; 41. Picking and placing clamp; 411. Mounting base; 41 2. Mounting frame; 413. Adjusting cylinder; 414. Connecting plate; 415. L-shaped rotating block; 416. Rotating fixed seat; 417. Mounting block; 418. Connecting piece; 419. Suction cup; 420. Rotating shaft; 5. Secondary positioning module; 51. Mounting frame; 52. Positioning platform; 53. First positioning reference; 54. Second positioning reference; 55. Left and right pushing module; 56. Front and rear pushing module; 6. Material tray positioning and moving module; 61. Moving motor; 62. Moving platform; 63. Lifting plate; 64. Limiting stop bar; 65. Limiting slider; 66. Moving synchronous belt; 67. Guide slide bar; 68. Lifting and separating cylinder; 7. Material. Detailed Implementation

[0020] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0021] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Please see Figure 1-8 A CNC automatic loading and unloading device includes a CNC machining center 1, a device body 3 located on one side of the CNC machining center 1, and a safety fence 2 surrounding the CNC machining center 1 and the device body 3. The CNC machining center 1 has a support platform 11 for placing materials 7. The top of the support platform 11 is inclined in a certain arc shape to facilitate the placement of materials with a tilted suction cup 419. A machining tool 12 is located directly above the support platform 11. A tool sensing sensor 13 is located on one side of the machining tool 12 to detect the presence or length of the tool. When a tool breakage or other abnormalities occur during machining, the tool sensing sensor can detect the problem. The sensor 13 transmits a signal to the alarm unit built into the CNC machining center 1 to trigger a shutdown alarm. The top of the main body 3 is divided into a feeding area and a discharging area. The top of the feeding area is provided with a full feeding tray storage rack 31 and an empty feeding tray storage rack 32 along the axial direction. The top of the discharging area is provided with a full discharging tray storage rack 33 and an empty discharging tray storage rack 34 along the axial direction. Multiple feeding trays 35 are stacked in both the full feeding tray storage rack 31 and the empty feeding tray storage rack 32. Multiple discharging trays 36 are stacked in both the full discharging tray storage rack 33 and the empty discharging tray storage rack 34. A tray positioning and moving module 6 is provided directly below the feeding area and the discharging area of ​​the main body 3. The tray positioning and moving module 6 includes two guide slide rods 67 disposed within the main body 3. Four limiting sliders 65 arranged in a matrix are slidably mounted on the two guide slide rods 67. A common moving platform 62 is connected directly above the four limiting sliders 65 via connecting bolts. A groove penetrating the center of the moving platform 62 is provided, and a vertically movable lifting plate 63 is arranged within the groove. A lifting and separating cylinder 68 is mounted at the bottom of the moving platform 62 via a cylinder bracket. The output end of the lifting and separating cylinder 68... Located directly below and abutting the bottom surface of the lifting plate 63, the material tray positioning and moving module 6 also includes a moving motor 61 and a moving synchronous belt 66 driven by the moving motor 61, which are installed in the main body 3 of the device. A transmission component extends downward from the bottom of the moving platform 62. The transmission component is clamped and fixed on the moving synchronous belt 66 by abutting blocks connected by bolts. Anti-slip grooves are provided on the end faces of the transmission component and the abutting block that contact the moving synchronous belt 66. The anti-slip grooves on the transmission component and the anti-slip grooves on the abutting block can mesh with each other. With the setting of the material tray positioning and moving module 6, when it is necessary to replace the feeding tray 35 and the discharging tray 36, the moving motor 61 drives the moving synchronous belt 66 to move forward and reverse to realize the reciprocating movement of the moving table 62 on the two guide slide rods 67. When the moving table 62 moves to the bottom of the storage rack, the lifting separation cylinder 68 drives the lifting plate 63 to move vertically up and down, thereby realizing the purpose of lifting and placing the material tray and picking up the material tray. A secondary positioning module 5 is provided on the side of the main body 3 near the empty feed tray storage rack 32. The secondary positioning module 5 includes a mounting frame 51 installed on the main body 3. A positioning platform 52 is provided on the top of the mounting frame 51. Two mutually symmetrical first positioning references 53 and multiple second positioning references 54 arranged at intervals along the axial direction are detachably connected to the positioning platform 52. A left and right pushing module 55 is provided at the center of the positioning platform 52. The left and right pushing module consists of a dual-axis pushing cylinder and pushing plates installed on the two output ends of the dual-axis pushing cylinder. The positioning platform 52 is far from the center. Two symmetrical front and rear pushing modules 56 are provided on one side away from the second positioning reference 54. The front and rear pushing modules 56 consist of front and rear pushing cylinders, an L-shaped metal part installed on the output end of the front and rear pushing cylinders, and a pushing rod installed on the L-shaped metal part. The pushing rod and the L-shaped metal part are connected by an adjustable component. The two first positioning references 53 and multiple second positioning references 54 enclose a positioning area where materials can be placed. A robot arm 4 is provided between the secondary positioning module 5 and the CNC machining center 1. A material handling fixture 41 is detachably installed on the robot arm 4. By setting up the secondary positioning module 5, when the robot arm 4 drives the material handling fixture 41 to grab the material in the feed tray 35 and place it in the positioning area on the secondary positioning module 5, the two push plates on the left and right push modules 55 move away from each other and contact the two first positioning references 53, so that the distance between the two materials can be kept constant. At the same time, the push rods of the two front and rear push modules 56 can push the two materials to contact the second positioning reference 54, so that the two materials are on the same axis, thereby ensuring the accuracy of material processing, reducing labor costs and avoiding inaccurate positioning due to improper operation by the operator, which would lead to failure to achieve processing accuracy and reduce the product scrap rate. The material handling fixture 41 includes a mounting base 411 for connecting the robot arm 4. The bottom of the mounting base 411 is detachably connected to a mounting frame 412. The bottom of the mounting frame 412 is equipped with two mutually symmetrical connecting parts 418 and two mutually symmetrical rotating fixed seats 416. A rotating shaft 420 is rotatably mounted inside the rotating fixed seat 416. The bottom of the rotating shaft 420 is connected to a mounting block 417. Sliding shafts are slidably arranged on the two mounting blocks 417 and the two connecting parts 418. A suction cup 419 is mounted on one end of the sliding shaft, and a vacuum fixing shaft is connected to the other end of the sliding shaft. An adjusting cylinder 413 is detachably connected to the mounting frame 412. A connecting plate 414 is mounted on the output end of the adjusting cylinder 413. Two mutually symmetrical L-shaped rotating blocks 417 are rotatably mounted on the connecting plate 414. The bottom of the L-shaped rotating blocks 417 is connected and fixed to one end of the rotating shaft 420. When the device sucks up the material 7 in the tray, the suction cups 419 at the bottom of the two rotating fixed seats 416 suck up the material 7 in the tray in a horizontal state. After the material is sucked up, the connecting plate 414 is moved horizontally by the adjusting cylinder 413, which in turn moves the rotating shaft horizontally and makes the L-shaped rotating block 416 rotate along the rotating fixed seat 416 at a certain angle. This causes the mounting block 417 to rotate the suction cup 419 at a certain angle, thereby adjusting the angle of the suction cup 419. At this time, the material 7 can be placed into the CNC machining center 1 for processing through the suction cup 419 after the angle is adjusted. After the material is placed, the above steps are repeated to continue sucking up the material 7 to be processed. After the processing is completed, the suction cups 419 at the bottom of the two connecting parts 418 suck up the processed material 7, and the suction cups 419 at the bottom of the mounting block 417 place the material to be processed into the processing position. This allows for the simultaneous picking up and placing of 4 lenses, further shortening the operation process and improving work efficiency. One end of the sliding shaft near the vacuum-fixed shaft is connected to a guide shaft via a metal sheet. The guide shaft is slidably arranged on the mounting block 417 or the connector 418. A stop block is provided at the end of the guide shaft away from the metal sheet, with a diameter larger than that of the guide shaft. A buffer spring is fitted onto the sliding shaft. One end of the buffer spring abuts against the connection between the sliding shaft and the suction cup 419, and the other end abuts against the mounting block 417 or the connector 418. When the suction cup 419 contacts the material 7, it allows the suction cup 419 to drive the sliding shaft and the guide shaft to move axially along the mounting block 417 or the connector 418, simultaneously compressing the buffer spring. This prevents damage to the material 7 caused by excessive force during the movement of the material handling clamp 4. When the material handling is complete, the elastic potential energy of the buffer spring allows the sliding shaft to... The moving shaft and guide shaft are reset. The top of the L-shaped rotating block 415 is provided with a movable groove. A cam follower bearing is provided in the movable groove. A rotating shaft is provided on the protruding end of the cam follower bearing. The rotating shaft is rotatably mounted on the connecting plate 414. A rotating hole is provided on the rotating fixed seat 416. Two bearings are arranged axially in the rotating hole. The rotating shaft 420 passes through the two bearings. When the adjusting cylinder 413 drives the connecting plate 414 to move axially, the cam follower bearing at the bottom of the rotating shaft moves in the movable groove at the top of the L-shaped rotating block through the connecting plate 414. This pushes the L-shaped rotating block to rotate along the rotating fixed seat 416 at a certain angle. The resistance of the rotating shaft 420 when rotating can be reduced through the two bearings in the rotating fixed seat 416. Two sets of symmetrical tray fixing mechanisms 38 are provided on the full feed tray storage rack 31, the empty feed tray storage rack 32, the full discharge tray storage rack 33, and the empty discharge tray storage rack 34. The tray fixing mechanism 38 includes a mounting bracket 385 installed on the full feed tray storage rack 31, the empty feed tray storage rack 32, the full discharge tray storage rack 33, and the empty discharge tray storage rack 34. One or two rectangular sliding grooves 381 are provided on the mounting bracket 385. A sliding block 382 is slidably arranged in the rectangular sliding groove 381. A support cylinder 383 is installed on the top of the mounting bracket 385. The output end of the support cylinder 383 is connected to the sliding block 382 through a connecting block 384. One or two first support grooves 351 and second support grooves 361 adapted to the sliding block 382 are provided on the feed tray 35 and the discharge tray 36.

[0024] With the provided tray fixing mechanism 38, when the tray positioning and moving module 6 retrieves the tray, the lifting and separating cylinder 68 drives the lifting plate 63 to rise vertically and contact the bottom tray in the storage rack. At this time, the support cylinder 383 drives the sliding block 382 away from the support groove on the tray through the connecting block 384, releasing the restriction on the tray. Then, the lifting and separating cylinder 68 can drive the lifting plate 63 to fall vertically to a certain height. When the support groove on the second to last tray is at the same level as the sliding block 382, ​​the support cylinder 383 drives the sliding block 382 to move towards the tray and insert it into the support groove through the connecting block 384, thereby limiting and fixing the remaining trays and completing the separation of the bottom tray. At this time, the tray positioning and moving module 6 moves the tray to the picking area of ​​the robot arm 4 and completes the tray retrieval process. Conversely, the tray can be lifted and placed.

[0025] Specifically, in this embodiment, the top of the moving table 62 is provided with four limiting bars 64 arranged in a matrix. The four limiting bars 64 are respectively set at the top edge of the moving table 62. The four limiting bars 64 enclose a placement area for placing the feed tray 35 or the discharge tray 36, which can effectively limit the position of the tray on the moving table 62 and ensure the stability of the tray on the moving table 62.

[0026] Specifically, in this embodiment, the connecting block 384 and the sliding block 382 are connected and fixed by connecting bolts.

[0027] Specifically, in this embodiment, the feed tray 35 and the discharge tray 36 are provided with multiple grooves for placing materials, and the multiple grooves are distributed in a matrix.

[0028] Specifically, in this embodiment, the first positioning reference 53 and the second positioning reference 54 are both made of rubber, and the first positioning reference 53 and the second positioning reference 54 are fixed to the positioning platform 52 by bolts.

[0029] In use, multiple feed trays 35 filled with materials to be processed are manually stacked into the full feed tray storage rack 31, and multiple empty discharge trays 36 are stacked into the empty discharge tray storage rack 34. The tray positioning and moving module 6 below the feeding area separates the bottom feed tray 35 in the full feed tray storage rack 31 and moves it to the picking area near the robot arm 4 for the robot arm to pick up and process. The tray positioning and moving module 6 below the discharge area moves the empty discharge tray storage rack 34... The bottommost discharge tray 36 is separated and moved to the unloading area near the robot arm 4. At this time, the robot arm 4 can drive the pick-and-place fixture 41 to move above the feed tray 35 in the pick-and-place area, and take out the material and place it on the secondary positioning module 5 for secondary positioning. After the secondary positioning is completed, the robot arm 4 drives the pick-and-place fixture 41 to pick up the material and place it into the CNC machining center 1 for processing. After processing is completed, the robot arm 4 drives the pick-and-place fixture 41 to move to the CNC machining center 1. The processed products are taken out from the processing center 1 and placed in the discharge tray 36 in the feeding area. The above process is repeated until the discharge tray 36 is full. Then, the full discharge tray 36 is moved to the bottom of the full discharge tray storage rack and lifted and placed by the tray positioning and moving module 6. The above steps for taking out the empty discharge tray 36 are repeated. When the feeding tray 35 in the feeding area is empty, the empty feeding tray 35 is moved to the bottom of the empty feeding tray storage rack and lifted and placed by the tray positioning and moving module 6. The above steps for taking out the full feeding tray 35 are repeated, thereby achieving the purpose of automatic loading and unloading. After all materials are processed, the operator can replace all feeding trays 35 and discharge trays 36 and repeat the above steps, which greatly reduces the frequency of material handling by the operator. This allows one worker to operate multiple machines, greatly reduces labor costs, and avoids inaccurate positioning due to improper operation by the operator, which would lead to failure to achieve processing accuracy and reduce the product scrap rate.

[0030] As a second embodiment of this application, in some places with strict requirements on floor space, the size of the feed tray 35 and the discharge tray 36 can be reduced to meet the site requirements; and due to the reduction in the size of the feed tray 35 and the discharge tray 36, the interval time for picking up and putting down materials will be reduced. Meanwhile, the main body 3 of the device does not require the installation of a storage rack. Only one set of feeding tray 35 and discharging tray 36 are placed in the material picking area and the material discharging area of ​​the main body 3, which can significantly reduce the floor space occupied by the main body 3 of the device.

[0031] It should be noted that the robotic arm, cylinder, and motor mentioned in this application are all electrically connected to an external controller and mains power. Furthermore, the selection, working principle, and usage of the CNC machining center, robotic arm, cylinder, motor, and standard parts mentioned in this application are all conventional technologies in this field, and will not be elaborated upon further in this application.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A CNC automatic loading and unloading equipment, comprising a CNC machining center, a device body arranged on one side of the CNC machining center, and a safety fence arranged between the CNC machining center and the device body, characterized in that: The top of the main body of the device is divided into a feeding area and a discharging area. Both the feeding area and the discharging area are equipped with a storage mechanism, and the storage mechanism is equipped with two sets of mutually symmetrical tray fixing mechanisms. A secondary positioning module is provided on the side of the main body of the device near the feeding area. A robot arm is provided between the secondary positioning module and the CNC machining center. A material handling fixture is detachably installed on the robot arm. The material handling fixture includes a mounting base for connecting a robotic arm. A mounting frame is detachably connected to the bottom of the mounting base. Two symmetrical connectors and two symmetrical rotating fixed seats are mounted on the bottom of the mounting frame. A rotating shaft is rotatably mounted inside the rotating fixed seat. A mounting block is connected to the bottom of the rotating shaft. Sliding shafts are slidably arranged on the two mounting blocks and the two connectors. A suction cup is mounted on one end of the sliding shaft, and a vacuum fixing shaft is connected to the other end of the sliding shaft. An adjusting cylinder is detachably connected to the mounting frame. A connecting plate is mounted on the output end of the adjusting cylinder. Two symmetrical L-shaped rotating blocks are rotatably mounted on the connecting plate. The bottom of the L-shaped rotating blocks is fixedly connected to one end of the rotating shaft. The sliding shaft is connected to a guide shaft via a metal sheet at one end near the vacuum fixing shaft. The guide shaft is slidably arranged on the mounting block or connector. A stop block is provided at the end of the guide shaft away from the metal sheet. The diameter of the stop block is larger than the diameter of the guide shaft. A buffer spring is sleeved on the sliding shaft. One end of the buffer spring abuts against the connection between the sliding shaft and the suction cup, and the other end of the buffer spring abuts against the mounting block or connector. The top of the L-shaped rotating block has a movable groove. A cam follower bearing is provided in the movable groove. A rotating shaft is provided on the protruding end of the cam follower bearing. The rotating shaft is rotatably mounted on the connecting plate. A rotating hole is provided through the rotating fixing seat. Two bearings are arranged axially at intervals in the rotating hole. The rotating shaft passes through the two bearings.

2. The CNC automatic feeding and discharging equipment according to claim 1, characterized in that: The storage mechanism includes a full-pan storage rack and an empty-pan storage rack at the top of the feeding area, and a full-pan storage rack and an empty-pan storage rack at the top of the discharging area. Multiple feeding pans are stacked within each of the full-pan and empty-pan storage racks, and multiple discharging pans are stacked within each of the full-pan and empty-pan storage racks. A pan positioning and moving module is located directly below both the feeding and discharging areas on the main body of the device. Each pan positioning and moving module includes two guide rods within the main body of the device. Four limit sliders arranged in a matrix are slidably mounted on the two guide rods. A moving platform is installed directly above the four limit sliders, and a lifting plate is slidably mounted on the moving platform. A lifting and separating cylinder is mounted on the bottom of the moving platform via a cylinder bracket, and the output end of the lifting and separating cylinder abuts against the bottom surface of the lifting plate.

3. The CNC automatic feeding and discharging equipment according to claim 2, characterized in that: The material tray positioning and moving module also includes a moving motor and a moving synchronous belt driven by the moving motor, and the moving table is connected to the moving synchronous belt through a transmission component.

4. The CNC automatic loading and unloading equipment according to claim 2, characterized in that: The top of the moving platform is provided with four limiting bars arranged in a matrix, which together form a placement area for placing a feed tray or a discharge tray.

5. The CNC automatic loading and unloading equipment according to claim 1, characterized in that: The secondary positioning module includes a mounting frame installed on the main body of the device. A positioning platform is provided on the top of the mounting frame. Two mutually symmetrical first positioning references and multiple second positioning references arranged at intervals along the axial direction are detachably connected to the positioning platform. A left and right pushing module is provided at the center of the positioning platform. Two mutually symmetrical front and rear pushing modules are provided on the side of the positioning platform away from the second positioning references.

6. A CNC automatic loading and unloading device according to claim 5, characterized in that: The two first positioning references and the plurality of second positioning references enclose a positioning area for placing materials.

7. A CNC automatic loading and unloading device according to claim 1, characterized in that: The material tray fixing mechanism includes mounting brackets installed on the full feed tray storage rack, the empty feed tray storage rack, the full discharge tray storage rack, and the empty discharge tray storage rack. The mounting brackets have rectangular sliding grooves that pass through them, and sliding blocks are slidably arranged in the rectangular sliding grooves. A support cylinder is installed on the top of the mounting brackets, and the output end of the support cylinder is connected to the sliding blocks through a connecting block. The feed tray and the discharge tray are each provided with a first support groove and a second support groove that are adapted to the sliding blocks.

8. A CNC automatic loading and unloading device according to claim 7, characterized in that: The connecting block and the sliding block are connected and fixed by connecting bolts.

9. A CNC automatic loading and unloading device according to claim 4, characterized in that: The feed tray and discharge tray are provided with multiple grooves for placing materials, and the multiple grooves are distributed in a matrix.

10. A CNC automatic loading and unloading device according to claim 5, characterized in that: Both the first and second positioning references are made of rubber, and the first and second positioning references are fixed to the positioning platform by bolts.

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