Automatic feeding equipment for metal sheets used in bending machines

Abstract

The present invention discloses an automatic feeding device for metal sheets for a bending machine, including a bending machine body, a feeding platform and a feeding device. The feeding device includes a track plate, a moving mechanism and a gripping mechanism, wherein the track plate is fixedly connected to the bending machine body; the track plate includes a first section and a tail section, wherein the first section is located on one side of a limit plate, and the tail section is suspended above the feeding platform. The present invention relates to the technical field of mechanical processing equipment, wherein the moving mechanism carries the gripping mechanism to perform lateral reciprocating movement, thereby realizing a more compact and efficient layout, and the double gripping is combined with the action of the first suction cup on the first clamping jaw of the electric mechanical clamping jaw to form a triple gripping effect, which greatly enhances the gripping force on the metal sheet, and the gas ejected from the nozzle acts in the gap, and the separation is assisted by the airflow, thereby effectively and quickly separating the gripped metal sheet from the metal sheet bonded below to form a gap, thereby providing a more efficient, stable and economical solution.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing equipment, in particular to automatic metal sheet feeding equipment for a bending machine. Background Art

[0002] In the sheet metal processing industry, the use of automatic feeding equipment has become very common. These devices are mainly used to accurately feed sheet metal into bending machines and other processing equipment to achieve automated production and improve production efficiency and accuracy. However, the existing sheet metal automatic feeding equipment has some shortcomings.

[0003] First, because the surface of metal sheets is relatively smooth, the surface tension between them is very large, making it easy for the sheets to be adsorbed together. When grabbing the top sheet, the sheet below is prone to displacement, affecting the accuracy of the next grab. This will cause errors in the loading process, which in turn affects the subsequent processing quality.

[0004] Secondly, the existing mechanical gripping equipment is expensive, occupies a large space, and runs slowly. This requires a large investment to deploy these devices on the production line, and due to the limitation of their running speed, they may become the bottleneck of the entire production line, reducing the overall production efficiency.

[0005] In addition, when the metal sheet moves to the predetermined position of the bending machine, inertial vibration will be generated because the metal sheet stops suddenly from a moving state to a stopped state. The vibration force is transmitted to the mechanical claw, resulting in the risk of the grasped metal sheet falling off or shifting.

[0006] Therefore, in view of the above problems, it is necessary to design a new type of automatic feeding equipment for metal sheets to solve the shortcomings of the prior art. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides an automatic feeding device for metal plates for a bending machine, which solves the problem that the grabbing mechanism of the existing plate bending machine occupies a large area and the grabbing is unstable.

[0008] To achieve the above object, the present invention is implemented through the following technical scheme: an automatic feeding device for metal sheets for a bending machine, comprising:

[0009] A bending machine body, wherein a bending processing section is arranged at the front side of the bending machine body, a material inlet is opened at one side of the bending processing section, and a limiting plate is fixed at the other side of the bending processing section;

[0010] A loading platform is arranged on one side of the bending machine body, and the loading platform abuts against the feeding port;

[0011] The feeding device is arranged inside the bending processing section and comprises:

[0012] A track plate is fixedly connected to the bending machine body; the track plate comprises a first section and a tail section, the first section is located on one side of the limit plate, and the tail section is suspended above the loading platform;

[0013] A moving mechanism, arranged on the inner side of the track plate;

[0014] The grabbing mechanism is fixed on the moving mechanism so that the moving mechanism can drive the grabbing mechanism to move repeatedly between the first section and the last section when moving.

[0015] Preferably, the moving mechanism comprises:

[0016] A rack fixed to the inner wall of the track plate along the length direction of the track plate;

[0017] A first guide rail is fixed to the inner wall of the track plate along the length direction of the track plate and is located at the upper and lower sides of the rack;

[0018] An assembly frame, whose outer side wall is provided with a slider, and the assembly frame is slidably connected to the first guide rail through the slider; the grabbing mechanism is fixed to the bottom of the assembly frame;

[0019] The motor is fixed on the assembly frame, and the output end of the motor is fixedly connected with a gear, and the gear is meshed with a rack.

[0020] Preferably, the gripping mechanism comprises:

[0021] A transverse assembly plate fixed to the bottom surface of the assembly frame;

[0022] a second guide rail fixed to the bottom surface of the transverse assembly plate;

[0023] A vertical assembly plate is slidably connected to the second guide rail via a sliding block;

[0024] A first electric telescopic rod is fixed to the bottom surface of the horizontal assembly plate, and an output end of the first electric telescopic rod is fixedly connected to the vertical assembly plate, so as to drive the vertical assembly plate to reciprocate on the bottom surface of the horizontal assembly plate;

[0025] A vacuum generator is fixed on the assembly frame; the vacuum generator comprises a compressed air inlet end, a negative pressure suction end and an air outlet end;

[0026] A first grabbing assembly, fixed to the front end of the transverse assembly plate;

[0027] A second grabbing assembly, fixed to the front end of the vertical assembly plate;

[0028] A shovel plate, fixing the bottom of the vertical assembly plate;

[0029] After the first grabbing assembly grabs the metal sheet, the first electric telescopic rod retracts to drive the shovel plate to insert into the bottom of the metal sheet, and enables the second grabbing assembly to contact the metal sheet for grabbing.

[0030] Preferably, the first grabbing assembly comprises:

[0031] A second electric telescopic rod, fixed to the front end of the transverse assembly plate;

[0032] The first suction cup is fixed on the output end of the second electric telescopic rod; the first suction cup is connected to the negative pressure suction end of the vacuum generator.

[0033] Preferably, the second grabbing assembly comprises:

[0034] An electric mechanical gripper having a first gripper and a second gripper;

[0035] The second suction cup is arranged on the clamping surface of the first clamping jaw; the second suction cup is connected to the negative pressure suction end of the vacuum generator.

[0036] Preferably, a plurality of shovel teeth are fixed to the front end of the shovel plate, a gap is formed between two adjacent shovel teeth, a nozzle is arranged inside the gap, and the nozzle is connected to the air outlet end of the vacuum generator.

[0037] Preferably, the outer side wall of the vertical assembly plate is elastically connected to a magnetic part via a spring, and an airbag is also provided on the outer side wall of the vertical assembly plate. The airbag half-wraps the magnetic part so that the magnetic part can be magnetically fixed on the limit plate; the airbag is connected to the air outlet end of the vacuum generator.

[0038] Preferably, the loading platform is provided with a aligning mechanism for arranging the metal sheets, and the aligning mechanism comprises:

[0039] A fixed limit baffle is fixed on one side of the top surface of the loading platform;

[0040] A stacking device is arranged on the other side of the top surface of the loading platform;

[0041] A driving assembly drives the alignment device to move along the length direction of the loading platform;

[0042] The alignment device comprises:

[0043] A third guide rail is fixed on the side wall surface of the loading platform along the length direction of the loading platform;

[0044] A box body, slidably connected to the third guide rail;

[0045] Two fourth guide rails are fixed on both sides of the top of the box;

[0046] A middle movable frame, slidably connected to the fourth guide rail;

[0047] A third electric telescopic rod is fixed on the box body, and an output end of the third electric telescopic rod passes through the box body and is fixedly connected to the middle movable frame to drive the middle movable frame to be slidably connected to the fourth guide rail;

[0048] A movable limit baffle is fixed on the middle movable frame, and when the third electric telescopic rod pushes the middle movable frame to slide and connect to the fourth guide rail, the movable limit baffle abuts against the outer edge of the metal plate placed on the loading platform;

[0049] The fifth guide rails, two in number, are fixed on both sides of the top of the middle movable frame;

[0050] An upper movable frame, slidably connected to the fifth guide rail;

[0051] A driving mechanism, disposed on the middle movable frame, driving the upper movable frame to be slidably connected to the fifth guide rail;

[0052] A support frame, fixed on the upper movable frame;

[0053] The fourth electric telescopic rod is fixed on the support frame, and a detection probe is installed on the output end of the fourth electric telescopic rod after passing through the support frame.

[0054] Preferably, the front side of the movable limit baffle is rotatably connected to a plurality of rollers.

[0055] Preferably, the driving assembly comprises:

[0056] A driving motor is fixed at the bottom of the loading platform;

[0057] There are two transmission rollers, which are respectively arranged at the front and rear ends of the loading platform;

[0058] The belt is sleeved on the two transmission rollers and fixed on the bottom surface of the box body.

[0059] Beneficial effects of the present invention: Compared with the prior art, the present invention provides an automatic feeding device for metal sheets for a bending machine, which has the following beneficial effects:

[0060] By arranging the lateral loading inside the bending processing section of the bending machine, the mobile mechanism carries the grabbing mechanism to perform lateral reciprocating movement, thereby achieving a more compact and efficient layout and reducing the floor space.

[0061] The first suction cup and the electric mechanical clamp are used to double-grasp the metal sheet, which improves the stability during clamping. The double grasping combined with the action of the first suction cup on the first clamp of the electric mechanical clamp forms a triple grasping effect, which greatly enhances the grasping force of the metal sheet and ensures that the adsorbed metal sheet will not fall off during the high-speed movement of the mobile mechanism.

[0062] During the grabbing process, the first electric telescopic rod retracts and drives the shovel plate to be inserted into the bottom of the metal plate. The insertion of the shovel plate causes a gap to separate the grabbed metal plate from the metal plate below. The gas sprayed from the nozzle acts in the gap, and the separation is assisted by the airflow, which effectively and quickly separates the grabbed metal plate from the metal plate below, thereby preventing the displacement of the lower plate.

[0063] When the moving mechanism drives the grabbing mechanism and the metal sheet to return to the first section, the dual forces of the airbag and the spring inside the magnetic attraction slow down the moving inertia of the moving mechanism. This deceleration buffer mechanism enables the moving mechanism to decelerate smoothly before stopping, reduces the vibration caused by inertia, and avoids the risk of vibration force being transmitted to the grabbing mechanism, causing the grabbed metal sheet to fall off or move.

[0064] Due to its more compact and efficient design, the automatic loading equipment reduces manufacturing and operating costs while maintaining high stability and accuracy, making it more suitable for the needs of large-scale production environments.

[0065] In summary, the automatic metal sheet feeding equipment of the present invention not only solves the problems existing in the prior art, but also provides a more efficient, stable and economical solution, bringing significant technological progress to the metal sheet processing industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0067] Figure 2 It is a structural schematic diagram of the feeding device of the present invention;

[0068] Figure 3 This is a schematic diagram of the shovel plate structure of the present invention;

[0069] Figure 4 A circuit diagram for connecting the vacuum generator of the present invention with the air bag, the nozzle, the first suction cup and the second suction cup;

[0070] Figure 5 It is a schematic diagram of the three-dimensional structure of the alignment device of the present invention;

[0071] Figure 6 A top view of the alignment device of the present invention;

[0072] Figure 7This is a schematic diagram of the connection structure between the roller and the movable limit baffle of the present invention;

[0073] Figure 8 It is a schematic diagram of the detection circuit of the detection probe of the present invention.

[0074] Description of reference numerals in the figures

[0075] 1. Bending machine body, 2. Limiting plate, 3. Feeding device, 31. Track plate, 31a. First section, 31b. Tail section, 32. First guide rail, 33. Rack, 34. Assembly frame, 35. Gear, 36. Motor, 37. Vacuum generator, 38. Second guide rail, 39. Airbag, 310. Magnetic suction piece, 311. Electric mechanical clamp, 312. Vertical assembly plate, 313. First electric telescopic rod, 314. First suction cup, 315. Second electric telescopic rod, 316. Second suction cup, 317. Shovel plate, 318. Shovel teeth, 319. Missing Mouth, 320, nozzle, 321, transverse assembly plate, 4, bending processing section, 5, loading platform, 6, fixed limit baffle, 7, alignment device, 71, third electric telescopic rod, 72, box body, 73, third guide rail, 74, middle movable frame, 75, fourth guide rail, 76, driving mechanism, 77, upper movable frame, 78, fourth electric telescopic rod, 79, movable limit baffle, 710, supporting frame, 711, fifth guide rail, 712, detection probe, 713, roller, 8, driving assembly, 81, belt, 82, transmission roller, 83, driving motor. DETAILED DESCRIPTION

[0076] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. As long as the effects of the present invention can be exerted, various changes can be made to the implementation scheme.

[0077] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0078] Reference Figure 1-8 An automatic metal sheet feeding device for a bending machine according to this embodiment is described.

[0079] like Figure 1As shown, the automatic feeding equipment for metal sheets for bending machines includes a bending machine body 1, a feeding platform 5 and a feeding device 3. A bending processing section 4 is arranged on the front side of the bending machine body 1. The bending processing section 4 includes an upper die and a lower die. The lower die is fixed on the workbench, and the upper die is installed at the lower end of the oil cylinder. The hydraulic system provides power, and the electrical system gives instructions. Under the action of the oil cylinder, the slider at the bottom of the oil cylinder drives the upper die downward to close with the lower die to realize the bending of the sheet. A feed port is opened on one side of the bending processing section 4, so that the metal sheet is fed from the side. A limiting plate 2 is fixed on the other side of the bending processing section 4; the feeding platform 5 is arranged on one side of the bending machine body 1, and the feeding platform 5 abuts at the feed port. Metal sheets are pre-stacked on the feeding platform 5, waiting to be fed into the bending processing section 4; the feeding device 3 is arranged on the inner side of the bending processing section 4, so that the metal sheet on the feeding platform 5 enters the bending processing section 4 from the feed port for bending.

[0080] In one embodiment, if Figure 1 and Figure 2 As shown, the feeding device 3 includes a track plate 31, a moving mechanism and a grabbing mechanism. The track plate 31 is fixedly connected to the bending machine body 1. When connected, the track plate 31 needs to be set along the left and right sides of the bending processing section 4; the track plate 31 includes a head section 31a and a tail section 31b. The head section 31a is located on one side of the limit plate 2, and the tail section 31b is suspended above the feeding platform 5 after extending out of the bending processing section 4; the moving mechanism is set on the inner side of the track plate 31; the grabbing mechanism is fixed on the moving mechanism, so that the moving mechanism can drive the grabbing mechanism to move repeatedly between the head section 31a and the tail section 31b when moving. When moving to the tail section 31b, the grabbing mechanism is located above the metal sheet on the feeding platform 5, and the metal sheet is grabbed at this time. After grabbing, the moving mechanism returns to the position of the head section 31a, and moves the metal sheet to the bending processing section 4 for processing.

[0081] Furthermore, in a preferred embodiment, travel limit switches (not shown in the figure) are provided at both the first section 31a and the tail section 31b, and the moving mechanism stops working when it touches the limit switch during repeated movement on the track plate 31.

[0082] In one embodiment, if Figure 2As shown, the moving mechanism includes a rack 33, a first guide rail 32, an assembly frame 34 and a motor 36. The rack 33 is fixed to the inner wall of the track plate 31 along the length direction of the track plate 31; the first guide rail 32 is fixed to the inner wall of the track plate 31 along the length direction of the track plate 31, and there are two of them and they are located on the upper and lower sides of the rack 33; a slider is installed on the outer side wall of the assembly frame 34, and the assembly frame 34 is slidably connected to the first guide rail 32 through the slider; the grabbing mechanism is fixed to the bottom of the assembly frame 34; the motor 36 is fixed to the assembly frame 34, and the output end of the motor 36 is fixedly connected to the gear 35, and the gear 35 is meshed with the rack 33. With the above-mentioned design, when the motor 36 works to drive the gear 35 to rotate, since the rack 33 is fixedly set, the assembly frame 34 moves on the first guide rail 32 through the slider, driving the grabbing mechanism to move horizontally. Furthermore, by the forward and reverse rotation of the motor 36 , the assembly frame 34 can drive the grabbing mechanism to move repeatedly between the first section 31 a and the last section 31 b when moving.

[0083] In one embodiment, if Figure 2 As shown, the grabbing mechanism includes a transverse assembly plate 321 , a second guide rail 38 , a vertical assembly plate 312 , a first electric telescopic rod 313 , a vacuum generator 37 , a first grabbing assembly, a second grabbing assembly and a shovel plate 317 .

[0084] Specifically, the horizontal assembly plate 321 is fixed to the bottom surface of the assembly frame 34; the second guide rail 38 is fixed to the bottom surface of the horizontal assembly plate 321; the vertical assembly plate 312 is slidably connected to the second guide rail 38 through a sliding block; the first electric telescopic rod 313 is fixed to the bottom surface of the horizontal assembly plate 321, and the output end of the first electric telescopic rod 313 is fixedly connected to the vertical assembly plate 312, and is used to drive the vertical assembly plate 312 to reciprocate on the bottom surface of the horizontal assembly plate 321; the vacuum generator 37 is fixed to the assembly frame 34; the vacuum generator 37 includes a compressed air inlet end, a negative pressure suction end and an air outlet end. end; the first grabbing component is fixed at the front end of the horizontal assembly plate 321; the second grabbing component is fixed at the front end of the vertical assembly plate 312; the shovel plate 317 is fixed to the bottom of the vertical assembly plate 312; wherein, after the first grabbing component grabs the metal sheet, the first electric telescopic rod 313 retracts to drive the shovel plate 317 to insert into the bottom of the metal sheet, and makes the second grabbing component contact the metal sheet for grabbing, thereby realizing the double grabbing of the metal sheet by the first grabbing component and the second grabbing component, and at the same time, the shovel plate 317 assists in separating the grabbed metal sheet from the metal sheet attached below, which can improve the grabbing stability.

[0085] The first grasping assembly includes a second electric telescopic rod 315 and a first suction cup 314. The second electric telescopic rod 315 is fixed to the front end of the horizontal assembly plate 321; the first suction cup 314 is fixed to the output end of the second electric telescopic rod 315; the first suction cup 314 is connected to the negative pressure suction end of the vacuum generator 37. When grasping, the second electric telescopic rod 315 advances to make the first suction cup 314 fit on the surface of the metal sheet at the uppermost end. At this time, the vacuum generator 37 works to generate negative pressure in the first suction cup 314, and the metal sheet is adsorbed on the first suction cup 314; after the adsorption is completed, the second electric telescopic rod 315 retracts to drive the metal sheet to move upward, so that it is separated from the metal sheet below.

[0086] The second gripping assembly includes an electric mechanical clamp 311 and a second suction cup 316. The electric mechanical clamp 311 has a first clamp and a second clamp, wherein the first clamp is located at the top and the second clamp is located at the bottom, and the clamping surfaces of the first clamp and the second clamp are arranged oppositely; the second suction cup 316 is arranged on the clamping surface of the first clamp; the second suction cup 316 is connected to the negative pressure suction end of the vacuum generator 37, and a solenoid valve is arranged on the connecting pipe, and the solenoid valve is closed before the second clamp is not working, so as to ensure that the first suction cup 314 has sufficient negative pressure to adsorb the metal sheet; after the first clamp clamps the metal sheet adsorbed by the first suction cup 314, the solenoid valve is opened, so that the second suction cup 316 also has negative pressure, so that the electric mechanical clamp 311 forms a double gripping effect of gripping and adsorption, and at the same time, cooperates with the first suction cup 314 to form a triple gripping effect, which greatly enhances the gripping force on the metal sheet, and ensures that the adsorbed metal sheet will not fall during the high-speed movement of the moving mechanism.

[0087] A plurality of shovel teeth 318 are fixed to the front end of the shovel plate 317, and a notch 319 is formed between two adjacent shovel teeth 318. A nozzle 320 is provided inside the notch 319, and the nozzle 320 is connected to the gas outlet end of the vacuum generator 37. When the shovel plate 317 is inserted into the gap separating the grabbed metal sheet and the metal sheet attached below, the nozzle 320 sprays gas to act in the gap, and the airflow assists the separation of the grabbed metal sheet from the metal sheet below, so as to prevent the adsorption effect between the two from causing the displacement of the metal sheet at the bottom of the drag.

[0088] The outer wall of the vertical assembly plate 312 is elastically connected with a magnetic member 310 through a spring, and the magnetic member 310 is an electromagnet. The outer wall of the vertical assembly plate 312 is also provided with an air bag 39, and the magnetic member 310 is located at the inner side of the air bag 39. Specifically, the air bag 39 half-wraps the magnetic member 310, and ensures that the magnetic member 310 can be magnetically fixed on the limit plate 2; the air bag 39 is connected to the air outlet end of the vacuum generator 37. In the specific implementation, when the moving mechanism drives the grabbing mechanism to move to the first section 31a position, the air bag 39 first contacts the limit plate 2, forming a buffer before the moving mechanism changes from the moving state to the static state. It should be explained in detail that, first, the airbag 39 contacts the limit plate 2, and the moving mechanism is buffered in the first step. Secondly, the magnetic component 310 is adsorbed on the limit plate 2, and at this time, the inertia force of the moving state compresses the spring. Under the dual force of the airbag 39 and the spring, the moving inertia of the moving mechanism is greatly slowed down. Finally, the buffered moving mechanism touches the limit switch, causing the moving mechanism to stop after deceleration and buffering, thereby slowing down the vibration generated by the moving inertia of the moving mechanism when it is stopped, and preventing the vibration force from being transmitted to the grasping mechanism, causing the grasped metal sheet to fall off or be displaced.

[0089] like Figure 1 and Figure 5 As shown, the loading platform 5 is provided with a stacking mechanism for arranging the metal sheets, and the stacking mechanism comprises a fixed limit baffle 6, a stacking device 7 and a driving assembly 8. The fixed limit baffle 6 is fixed to one side of the top surface of the loading platform 5; the stacking device 7 is arranged on the other side of the top surface of the loading platform 5; the driving assembly 8 drives the stacking device 7 to move in the length direction of the loading platform 5, and during the movement, the edge of the metal sheet is pushed to push the metal sheet against the wall surface of the fixed limit baffle 6, so that the metal sheets are stacked.

[0090] like Figure 5As shown, the alignment device 7 includes a third electric telescopic rod 71, a box 72, a third guide rail 73, a middle movable frame 74, a fourth guide rail 75, a driving mechanism 76, an upper movable frame 77, a fourth electric telescopic rod 78, a movable limit baffle 79, a support frame 710 and a fifth guide rail 711. The specific positional relationship is: the third guide rail 73 is fixed on the side wall surface of the loading platform 5 along the length direction of the loading platform 5; the box 72 is slidably connected to the third guide rail 73; the driving component 8 drives the alignment device 7 to move along the length direction of the loading platform 5; the driving component 8 includes a belt 81, a transmission roller 82 and a driving motor 83. The driving motor 83 is fixed to the bottom of the loading platform 5; there are two transmission rollers 82, which are respectively arranged at the front and rear ends of the loading platform 5; the belt 81 is sleeved on the two transmission rollers 82, and the belt 81 is fixed to the bottom surface of the box 72. When working, the driving motor 83 drives the belt 81 to rotate through the transmission roller 82. Since the belt 81 and the box 72 are fixed, the belt 81 carries the box 72 together when running. When the box 72 moves, it is slidably connected to the third guide rail 73 on the side wall of the loading platform 5; the box 72 is moved from one end of the loading platform 5 to the other end through the forward and reverse rotation of the driving motor 83.

[0091] There are two fourth guide rails 75 fixed on both sides of the top of the box body 72; the middle movable frame 74 is slidably connected to the fourth guide rails 75; the third electric telescopic rod 71 is fixed to the box body 72, and the output end of the third electric telescopic rod 71 passes through the box body 72 and is fixedly connected to the middle movable frame 74 to drive the middle movable frame 74 to slide and connect to the fourth guide rails 75; the movable limit baffle 79 is fixed to the middle movable frame 74, and when the third electric telescopic rod 71 pushes the middle movable frame 74 to slide and connect to the fourth guide rails 75, the movable limit baffle 79 contacts the metal plate placed on the loading platform 5 The outer edge of the metal sheet is driven to abut against the fixed limit baffle 6, so that the movable limit baffle 79 and the fixed limit baffle 6 clamp the metal sheet to make it neat; further, the front side of the movable limit baffle 79 is rotatably connected to a plurality of rollers 713. Since the box body 72 is movable, the rollers 713 on the front side of the movable limit baffle 79 abut against the outer edge of the metal sheet during the movement. Therefore, when the box body 72 moves, the rollers 713 on the inner side of the movable limit baffle 79 roll on the edge position of the metal sheet, thereby realizing the neatening of the metal sheet in the moving state. There are two fifth guide rails 711, which are fixed on both sides of the top of the middle movable frame 74; the upper movable frame 77 is slidably connected to the fifth guide rail 711; the driving mechanism 76 is arranged on the middle movable frame 74, driving the upper movable frame 77 to be slidably connected to the fifth guide rail 711; the support frame 710 is fixed to the upper movable frame 77; the fourth electric telescopic rod 78 is fixed to the support frame 710, and the output end of the fourth electric telescopic rod 78 passes through the support frame 710 and is installed with a detection probe 712. It should be noted that the driving mechanism 76 includes a small motor, two pulleys and a belt, and the top surface of the belt is connected and fixed to the upper movable frame 77. The driving mechanism 76 can also be an electric telescopic rod, driving the upper movable frame 77 to be slidably connected to the fifth guide rail 711.

[0092] Before the box body 72 moves from one end of the loading platform 5 to the other end, the fourth electric telescopic rod 78 adjusts up and down to make the detection probe 712 higher than the top position of the metal plate to be detected, and the third electric telescopic rod 71 pushes the middle movable frame 74 to move on the box body 72, so that the middle movable frame 74 can be suspended above the loading platform 5. At this time, the detection probe 712 is suspended above the metal plate. During the movement of the box body 72 from one end of the loading platform 5 to the other end, the driving mechanism 76 drives the upper movable frame 77 and the support frame 710 to move repeatedly, so that the detection probe 712 moves in the left and right directions and also in the front and back directions, so that the detection line is wavy in shape to detect the flatness of the metal plate.

[0093] Working principle:

[0094] Firstly: the third electric telescopic rod 71 pushes the middle movable frame 74 to move on the box body 72, so that the middle movable frame 74 can be suspended above the loading platform 5, and the fourth electric telescopic rod 78 adjusts up and down to make the detection probe 712 higher than the top position of the metal sheet to be detected, and the driving motor 83 works to move the box body 72 from one end of the loading platform 5 to the other end, and the driving mechanism 76 works to drive the upper movable frame 77 and the support frame 710 to move repeatedly, so that the detection probe 712 moves in the left and right direction while also moving in the front and back direction, so that the detection line is in a wave shape to detect the flatness of the metal sheet.

[0095] Secondly: when the motor 36 drives the gear 35 to rotate, since the rack 33 is fixed, the motor 36 and the assembly frame 34 move on the first guide rail 32 through the slider, driving the grabbing mechanism to move horizontally. After moving to the tail section 31b, the second electric telescopic rod 315 advances to make the first suction cup 314 fit the surface of the metal sheet at the uppermost end. At this time, the vacuum generator 37 works to generate negative pressure in the first suction cup 314, and the metal sheet is adsorbed on the first suction cup 314; after the adsorption is completed, the second electric telescopic rod 315 retracts to drive the metal sheet to move upward, so that it is separated from the metal sheet below. At the same time, the first electric telescopic rod 313 retracts to drive the shovel plate 317 to insert into the bottom of the metal plate, and makes the second grasping assembly close to the metal plate; when the shovel plate 317 is inserted into the gap separating the grasped metal plate and the metal plate adhered below, the nozzle 320 sprays gas into the gap, and assists the grasped metal plate to separate from the metal plate below through the airflow; the electric mechanical clamp 311 works to make the first clamp and the second clamp clamp the metal plate, and the second suction cup 316 located on the clamping surface of the first clamp also synchronously adsorbs the metal plate.

[0096] Finally: the motor 36 works in the reverse direction, driving the grabbing mechanism to move horizontally and reset to the first section 31a. First, the airbag 39 contacts the limit plate 2 to buffer the moving mechanism in the first step. Then, the magnetic suction member 310 is adsorbed on the limit plate 2, and the inertia force of the moving state compresses the spring. Under the dual force of the airbag 39 and the spring, the moving inertia of the moving mechanism is greatly slowed down. When the magnetic suction member 310 adsorbs the limit plate 2, the electric mechanical clamp 311 releases the metal sheet, and the first electric telescopic rod 313 pushes the vertical assembly plate 312 to move backward to make the electric mechanical clamp 311 detach from the metal sheet. Finally, the buffered moving mechanism touches the limit switch, causing the moving mechanism to stop after deceleration and buffering. The second electric telescopic rod 315 pushes the metal sheet to descend, and the vacuum generator 37 stops working to make the first suction cup 314 release the metal sheet. The metal sheet falls onto the bending processing section 4, and the upper and lower dies at the bending processing section 4 bend the metal sheet.

[0097] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic feeding device for metal sheets for a bending machine, characterized in that: include: A bending machine body (1), wherein a bending processing section (4) is arranged on the front side of the bending machine body (1), a material inlet is provided on one side of the bending processing section (4), and a limiting plate (2) is fixed on the other side of the bending processing section (4); A loading platform (5) is arranged on one side of the bending machine body (1), and the loading platform (5) abuts against the material inlet; The feeding device (3) is arranged on the inner side of the bending processing section (4), and comprises: A track plate (31) fixedly connected to the bending machine body (1); the track plate (31) comprises a first section (31a) and a tail section (31b), the first section (31a) being located on one side of the limit plate (2), and the tail section (31b) being suspended above the loading platform (5); A moving mechanism is arranged on the inner side of the track plate (31); the moving mechanism comprises a first guide rail (32) and an assembly frame (34); the first guide rail (32) is fixed to the inner wall of the track plate (31) along the length direction of the track plate (31); a sliding block is installed on the outer side wall of the assembly frame (34); the assembly frame (34) is slidably connected to the first guide rail (32) via the sliding block; A gripping mechanism is fixed on the moving mechanism, so that the moving mechanism can drive the gripping mechanism to move repeatedly between the first section (31a) and the last section (31b) when moving; the gripping mechanism is fixed on the bottom of the assembly frame (34); The grabbing mechanism comprises: A transverse assembly plate (321) fixed to the bottom surface of the assembly frame (34); A second guide rail (38) fixed to the bottom surface of the transverse assembly plate (321); A vertical assembly plate (312) is slidably connected to the second guide rail (38) via a sliding block; A first electric telescopic rod (313) is fixed to the bottom surface of the transverse assembly plate (321), and an output end of the first electric telescopic rod (313) is fixedly connected to the vertical assembly plate (312) for driving the vertical assembly plate (312) to reciprocate on the bottom surface of the transverse assembly plate (321); A vacuum generator (37) is fixed on the assembly frame (34); the vacuum generator (37) comprises a compressed air inlet end, a negative pressure suction end and an air outlet end; A first grabbing assembly, fixed to the front end of the transverse assembly plate (321); A second grabbing assembly, fixed to the front end of the vertical assembly plate (312); A shovel plate (317) fixed to the bottom of the vertical assembly plate (312); After the first grabbing assembly grabs the metal sheet, the first electric telescopic rod (313) retracts to drive the shovel plate (317) to insert into the bottom of the metal sheet, and enables the second grabbing assembly to contact the metal sheet for grabbing; The first grabbing component comprises: A second electric telescopic rod (315) fixed to the front end of the transverse assembly plate (321); A first suction cup (314) is fixed to the output end of the second electric telescopic rod (315); the first suction cup (314) is connected to the negative pressure suction end of the vacuum generator (37); The second grabbing component comprises: An electric mechanical clamp (311) having a first clamp and a second clamp; A second suction cup (316) is arranged on the clamping surface of the first clamping jaw; the second suction cup (316) is connected to the negative pressure suction end of the vacuum generator (37); A plurality of shovel teeth (318) are fixed to the front end of the shovel plate (317), a notch (319) is formed between two adjacent shovel teeth (318), a nozzle (320) is provided inside the notch (319), and the nozzle (320) is connected to the air outlet end of the vacuum generator (37); The outer wall of the vertical assembly plate (312) is elastically connected to a magnetic member (310) via a spring, and the outer wall of the vertical assembly plate (312) is also provided with an air bag (39), wherein the air bag (39) half-wraps the magnetic member (310) so that the magnetic member (310) can be magnetically fixed on the limit plate (2); the air bag (39) is connected to an air outlet end of a vacuum generator (37).

2. The automatic metal sheet feeding device for a bending machine according to claim 1 is characterized in that: The moving mechanism also includes: A rack (33) fixed to the inner wall of the track plate (31) along the length direction of the track plate (31); A motor (36) is fixed on the assembly frame (34); an output end of the motor (36) is fixedly connected to a gear (35); the gear (35) is meshed with the rack (33); The first guide rails (32) are two in number and are located on the upper and lower sides of the rack (33).

3. The automatic metal sheet feeding device for a bending machine according to claim 1 is characterized in that: The loading platform (5) is provided with a aligning mechanism for arranging the metal sheets, and the aligning mechanism comprises: A fixed limit baffle (6) fixed on one side of the top surface of the loading platform (5); An alignment device (7) is arranged on the other side of the top surface of the loading platform (5); A driving assembly (8) drives the alignment device (7) to move along the length direction of the loading platform (5); The alignment device (7) comprises: A third guide rail (73) is fixed on the side wall surface of the loading platform (5) along the length direction of the loading platform (5); A box body (72) slidably connected to the third guide rail (73); Two fourth guide rails (75) are fixed on both sides of the top of the box body (72); A middle movable frame (74) slidably connected to the fourth guide rail (75); A third electric telescopic rod (71) is fixed on the box (72); an output end of the third electric telescopic rod (71) passes through the box (72) and is fixedly connected to the middle movable frame (74) to drive the middle movable frame (74) to be slidably connected to the fourth guide rail (75); A movable limit baffle (79) is fixed on the middle movable frame (74), and when the third electric telescopic rod (71) pushes the middle movable frame (74) to slide and connect to the fourth guide rail (75), the movable limit baffle (79) contacts the outer edge of the metal plate placed on the loading platform (5); Two fifth guide rails (711) are fixed on both sides of the top of the middle movable frame (74); An upper movable frame (77) slidably connected to the fifth guide rail (711); A driving mechanism (76) is arranged on the middle movable frame (74) and drives the upper movable frame (77) to be slidably connected to the fifth guide rail (711); A support frame (710) fixed on the upper movable frame (77); The fourth electric telescopic rod (78) is fixed on the support frame (710), and the output end of the fourth electric telescopic rod (78) passes through the support frame (710) and is equipped with a detection probe (712).

4. The automatic metal sheet feeding device for a bending machine according to claim 3 is characterized in that: The front side of the movable limit baffle (79) is rotatably connected to a plurality of rollers (713).

5. The automatic metal sheet feeding device for a bending machine according to claim 3 is characterized in that: The driving assembly (8) comprises: A driving motor (83) fixed to the bottom of the loading platform (5); There are two transmission rollers (82), which are respectively arranged at the front and rear ends of the loading platform (5); A belt (81) is sleeved on the two transmission rollers (82), and the belt (81) is fixed to the bottom surface of the box body (72).

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