An automated production line for punching, shearing and folding sheet metal

Abstract

The present invention discloses an automated production line for punching, shearing and folding sheet metal in the field of sheet metal processing, which includes a punch loading unit, a CNC turret punch press, a CNC shearing center and a folding unit arranged in sequence from front to back. The punch loading unit is correspondingly arranged opposite to the CNC turret punch press. The CNC turret punch press is correspondingly arranged opposite to the CNC shearing center. A loading and unloading unit is correspondingly arranged opposite to the CNC shearing center, and the loading and unloading unit is also correspondingly arranged opposite to the CNC turret punch press. A conveying and positioning line is correspondingly arranged at the discharge end of the CNC shearing center, and the discharge end of the conveying and positioning line is correspondingly arranged opposite to the folding unit. The present invention can, according to the processing technology of different sheet metals, perform operations such as loading the sheet from the raw material area, stamping, shearing, folding and processing into finished products, and finally stacking them neatly, greatly improving the processing efficiency on the premise of ensuring the processing accuracy.

Description

Technical Field

[0001] The present invention belongs to the field of sheet metal processing, and particularly relates to a punching, shearing and folding sheet metal automatic production line. Background Art

[0002] In the prior art, during the processing and manufacturing of sheet metal parts in industries such as new energy, elevator industry, bridge industry, door panel industry, high and low voltage switch cabinets, etc., punching presses, CNC shearing centers, and bending machines are often required. The existing sheet metal production processes are mostly single-machine production or single-automatic unit production. Single-machine production has low efficiency, high manual labor intensity, and time-consuming and laborious transfer procedures. While a single automatic unit can only solve the problem of high manual labor intensity in a single process and cannot form a fully automated production. A large amount of manpower is still required for transfer and secondary positioning processing. These mechanical devices and production processes can no longer meet the current high-efficiency and high-automation requirements of sheet metal production. Summary of the Invention

[0003] The purpose of the present invention is to provide a punching, shearing and folding sheet metal automatic production line, which can, according to the processing technology of different sheet metals, perform operations such as feeding the sheet from the raw material area to stamping, shearing, and bending into finished products, and finally stack them neatly, greatly improving the processing efficiency on the premise of ensuring processing accuracy.

[0004] The purpose of the present invention is achieved as follows: A punching, shearing and folding sheet metal automatic production line includes a punch loading unit, a CNC turret punch press, a CNC shearing center, and a bending unit arranged in sequence from front to back. The punch loading unit is correspondingly arranged opposite to the CNC turret punch press. The CNC turret punch press is correspondingly arranged opposite to the CNC shearing center. A loading and unloading unit is correspondingly arranged opposite to the CNC shearing center, and the loading and unloading unit is also correspondingly arranged opposite to the CNC turret punch press. A conveying and positioning line is provided corresponding to the discharge end of the CNC shearing center, and the discharge end of the conveying and positioning line is correspondingly arranged opposite to the bending unit.

[0005] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Function of the positioning device: Initial positioning of the sheet and magnetic sheet separation mechanism; The structure is composed of an adjustable positioning rod and a rotating magnetic separator. The positioning rod can be adjusted back and forth, and for the rotating separator, the magnet can rotate and move up and down through a cantilever mechanism; Advantage: When stacking a whole stack of sheets, it can rotate away from the magnetic sheets without affecting the feeding accuracy. After feeding is completed, it can rotate back to its original position for magnetic sheet separation operation.

[0006] 2. Function of the inclined pushing device: When feeding into the main machine, it pushes the single sheets of plates that are not neatly stacked into the jaws of the clamp; the structure consists of an upper and lower floating cylinder, a rotating shaft, a pushing cylinder, a limiting mechanism, and a suction cup; Action principle: It participates in sucking or not sucking the plates through up and down movement. After sucking the plates, when pushing the plates into the clamp, the rotating mechanism and the limiting mechanism come into play. The rotating mechanism adapts to different angles for pushing, and the limiting mechanism restricts the direction and angle within this range. Since the cylinder has a certain flexibility and elasticity, it can reliably push the edge of the sheet into the jaws of the clamp through movement.

[0007] 3. Function of the manipulator: Grabs the plates and drives the movement of the plates, and is equipped with a mechanical sheet separation device and an inclined pushing device; the structure consists of a suction cup device, a mechanical suction cup sheet separation device, and an inclined pushing device; Action principle: After sucking the plates by vacuum suction of the suction cup, the mechanical sheet separation device moves up and down through the cylinder to shake off the possible phenomenon of multiple sheets. After the manipulator moves to the jaws of the punching machine, the inclined pushing device and the lower pressing suction cup push the plates into the jaws of the clamp through the pushing movement.

[0008] 4. Production line and process: Completely link the punching machine, shearing machine, and bending machine for sheet metal processing through an automated unit, enabling one-time automated processing of sheet metal products, with high processing composite accuracy and reduced scrap rate, capable of unmanned 24-hour processing, high processing efficiency, and a compact structure. Since the product transfer and the floor area occupied by semi-finished materials are reduced, the factory floor area is saved.

[0009] The present invention connects a CNC turret punching machine, a CNC shearing center, and a bending unit through automated equipment to perform fully automated processing such as punching, shearing, and bending forming on metal plates; it has a wide range of functions in the field of metal plate processing. The production line of the present invention is mainly applied to the processing of sheet metal parts in industries such as new energy, elevator industry, bridge industry, door panel industry, high and low voltage switchgear, etc., as well as high-end application groups that comprehensively realize an intelligent workshop for sheet metal processing.

[0010] As a further improvement of the present invention, the feeding unit of the punching machine includes a feeding positioning device. The feeding positioning device includes a plurality of rectangular support seats arranged horizontally on the ground, and a plurality of positioning rods arranged in an L shape are correspondingly provided on the outer periphery of each support seat. The mounting plate at the lower end of the positioning rod is fixedly connected to the L-shaped lower seat plate through at least two fasteners, and a plurality of waist-shaped grooves are correspondingly provided on the lower seat plate for each fastener; a rotary magnetic sheet separation device is provided on the lower seat plate corresponding to each support seat. The upper sides of the support seats form a support surface, and the plates are stacked and palletized on the support seats. The positioning rods physically position the plates, and the rotary magnetic sheet separation device controls the magnetic force magnitude to facilitate the suction cup to suck away the upper layer of plates.

[0011] As a further improvement of the present invention, a loading manipulator is provided corresponding to the loading and positioning device. The loading manipulator includes a vertical frame. A fixed beam is horizontally arranged at the upper part of the frame. Two transverse guide rails are arranged in parallel on the fixed beam. A moving seat is movably connected to the two guide rails through sliders. A transverse rack is also arranged between the two guide rails on the fixed beam. A lifting column is movably connected to the moving seat. An adsorption bracket is horizontally arranged at the lower end of the lifting column. A plurality of main suction cups are arranged on the lower surface of the adsorption bracket. A plurality of groups of vibration sheet separation mechanisms and oblique pushing mechanisms are also arranged on the lower surface of the adsorption bracket. Two reduction motors are arranged on the moving seat. A gear meshing with the transverse rack is arranged at the output end of one reduction motor. A vertical rack is arranged on the side surface of the lifting column. A gear meshing with the vertical rack is arranged at the output end of the other reduction motor. The loading manipulator mainly makes vertical and horizontal movements driven by a servo motor to adsorb the sheet material for loading the punch press.

[0012] To facilitate the installation of each suction cup, the adsorption bracket includes a rectangular main bracket. A plurality of longitudinal sub-beams are arranged at intervals in the transverse direction on the lower side of the main bracket. L-shaped reinforcing angle irons connecting the corresponding longitudinal sub-beams are arranged on both the left and right sides of the main bracket. A plurality of main suction cups are arranged longitudinally on the lower side of each longitudinal sub-beam.

[0013] In order to separate sheets during the feeding of the punching machine and ensure the accuracy of the feeding action, at least two groups of vibration separation mechanisms are provided on the longitudinal beam near the numerical control turret punching machine. Each vibration separation mechanism is arranged corresponding to each positioning rod forming an L shape. The vibration separation mechanism includes a mounting plate fixed on the outer side of the longitudinal beam. A vertical lifting rod passing through the mounting plate is movably connected to the mounting plate. A separation suction cup is provided at the lower end of the lifting rod. A first spring is sleeved on the outer periphery of the lifting rod, and the upper and lower ends of the first spring are elastically abutted against the mounting plate and the suction cup seat of the separation suction cup respectively. A separation cylinder is vertically arranged on the lower side of the mounting plate. The piston rod of the separation cylinder passes through the mounting plate upward and is connected to a transmission plate. The other end of the transmission plate is connected to the upper end of the lifting rod; A connecting rod passing through the longitudinal beam upward is vertically arranged on the upper part of the suction cup seat of each main suction cup. The connecting rod is movably connected to the longitudinal beam. A limiting seat contacting the longitudinal beam is provided at the upper end of the connecting rod. A second spring is sleeved on the outer periphery of the connecting rod, and the upper and lower ends of the second spring are elastically abutted against the longitudinal beam and the suction cup seat of the main suction cup respectively; At least three groups of oblique pushing mechanisms are provided. Each oblique pushing mechanism is arranged at one end of the main support close to the numerical control turret punching machine on the left side. Each oblique pushing mechanism is arranged corresponding to the numerical control turret punching machine. Each group of the oblique pushing mechanisms is respectively located between two adjacent longitudinal beams corresponding to it. The oblique pushing mechanism includes a side base frame fixed on the main support. A vertical separation cylinder is installed on the side base frame. The piston rod of the separation cylinder extends downward and is provided with a mounting frame. An oblique pushing cylinder is installed below the mounting frame. The cylinder body of the oblique pushing cylinder is rotationally connected to the mounting frame through a rotating shaft. An L-shaped limiting frame is arranged on the side surface of the mounting frame corresponding to the oblique pushing cylinder. An oblique pushing suction cup and a rotatable guide wheel are provided at the end of the piston rod of the oblique pushing cylinder. The guide wheel is located above the oblique pushing suction cup. The guide wheel is kept in contact with the limiting part of the limiting frame. The oblique pushing cylinder is obliquely arranged. When sucking the sheet material, the oblique pushing suction cup, the main suction cup and the separation suction cup are arranged in the same plane. The oblique pushing suction cup, the main suction cup and the separation suction cup are all vacuum suction cups; Multiple suction cups are arranged on the loading manipulator. The main suction cup adsorbs the sheet material. The separation cylinder drives the transmission plate to vibrate up and down. The lifting rod drives the separation suction cup to move up and down to shake off the possible phenomenon of multiple sheets; The limiting frame of the oblique pushing mechanism includes a main frame and a sub-frame. A waist-shaped groove is opened on the sub-frame. The fastener passes through the waist-shaped groove and is connected to the main frame. The position of the sub-frame relative to the main frame is adjustable. The oblique pushing suction cup and the guide wheel are respectively installed at the lower part and the upper part of the support at the end of the piston rod of the oblique pushing cylinder. After the manipulator moves to the clamping jaw of the punching machine, the separation cylinder of the oblique pushing mechanism drives the mounting frame to descend, pressing down the oblique pushing suction cup. The rotating shaft pushes the material at different angles adaptively, and the limiting mechanism limits the direction and angle within this range. Since the cylinder has a certain flexibility and elasticity, the edge of the sheet material can be reliably pushed into the clamping jaw of the clamp through the pushing movement; The double-sheet measuring mechanism measures the thickness of the sheet material through a mechanical structure equipped with an encoder and compares relevant values to confirm whether multiple sheets are grabbed.

[0014] In order to punch the sheet metal, the CNC turret punch press includes a punch press body, and a material grabbing manipulator capable of grabbing the sheet metal and moving horizontally is arranged on the punch press body. The material grabbing manipulator is located on the left side of the punch press body and is arranged corresponding to the loading unit of the punch press.

[0015] In order to cut the sheet metal into a required specified area, the CNC shearing center includes a shearing machine body. A plurality of feeding clamps capable of grabbing the sheet metal and moving longitudinally are arranged on the shearing machine body at intervals in the horizontal direction. A gantry frame 1 is arranged corresponding to the shearing machine body. A shearing tool is arranged on the gantry frame 1. A plurality of turnover frames evenly distributed at equal intervals in the horizontal direction are arranged on the shearing machine body corresponding to the gantry frame 1. A guiding slope is arranged at the tail end of the shearing machine body; the loading and unloading unit includes a gantry frame 2 corresponding to the shearing machine body. A manipulator capable of moving horizontally is arranged on the gantry frame 2. The manipulator is arranged longitudinally. At least two loading and unloading clamps distributed at intervals in the longitudinal direction are arranged on the manipulator. The loading and unloading clamp includes a clamping cylinder. A lower clamping seat is arranged at the extending end of the piston rod of the clamping cylinder. An upper clamping seat corresponding to the lower clamping seat is arranged on the cylinder body of the clamping cylinder. The loading and unloading unit sends the punched sheet metal to the shearing machine body. The feeding clamps drive the sheet metal to move backward. The shearing tool shears the sheet metal. The turnover frames turn over so that the sheared sheet metal falls onto the conveying and positioning line through the guiding slope.

[0016] In order to send the sheet metal to the bending unit, the conveying and positioning line is arranged horizontally and corresponds to the guiding slope. The conveying and positioning line includes two side fixing frames corresponding to each other on the left and right. A conveyor belt is arranged between the two side fixing frames. A plurality of vertical positioning rods are arranged at intervals in the horizontal direction on the outer side fixing frame facing outward.

[0017] In order to automatically bend the sheet metal and stack the finished products, the bending unit includes a bending manipulator. The bending manipulator is arranged corresponding to the discharging end of the conveying and positioning line. A suction cup frame is arranged at the end of the bending manipulator. A plurality of vacuum suction cups are arranged densely on the suction cup frame. A positioning table, a bending machine and a flanging table are respectively arranged corresponding to the bending manipulator. The positioning table is arranged obliquely and a positioning strip surrounding an L shape is arranged on the outer periphery of the positioning table. The finished products after bending are placed on the stacking tray. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the present invention.

[0019] Figure 2 Schematic structural diagram of the loading unit of the punch press.

[0020] Figure 3 It is a schematic structural diagram of the loading positioning device.

[0021] Figure 4 It is a schematic structural diagram of the adsorption bracket.

[0022] Figure 5 For Figure 4Enlarged view of area A

[0023] Figure 6 is Figure 4 Enlarged view of area B

[0024] Figure 7 Schematic structural diagram of the oblique pushing mechanism

[0025] Figure 8 Schematic structural diagram of the oblique pushing mechanism

[0026] Figure 9 Schematic structural diagram of the CNC turret punch press

[0027] Figure 10 Schematic structural diagram of the loading and unloading unit

[0028] Figure 11 Schematic structural diagram of the loading and unloading clamp

[0029] Figure 12 Schematic structural diagram of the CNC shearing center

[0030] Figure 13 Schematic structural diagram of the conveying and positioning line

[0031] Figure 14 Schematic structural diagram of the bending unit

[0032] Among them, 1 is the support base, 2 is the positioning rod, 3 is the lower seat plate, 4 is the kidney-shaped groove, 5 is the rotary magnetic sheet separating device, 6 is the loading manipulator, 6a is the vertical frame, 6b is the fixed beam, 7 is the guide rail, 8 is the transverse rack, 9 is the moving seat, 10 is the lifting column, 11 is the adsorption bracket, 11a is the main bracket, 11b is the longitudinal dividing beam, 12 is the main suction cup, 13 is the reinforcing angle iron, 14 is the mounting plate, 15 is the lifting rod, 16 is the separating suction cup, 16a is the suction cup seat, 17 is the first spring, 18 is the separating cylinder, 19 is the transmission plate, 20 is the connecting rod, 20a is the limit seat, 21 is the second spring, 22 is the side base frame, 23 is the separating cylinder, 24 is the mounting frame, 25 is the oblique pushing cylinder, 26 is the rotating shaft, 27 is the limit frame, 27a is the limiting part, 28 is the guide wheel, 29 is the oblique pushing suction cup, 30 is the punch body, 31 is the material-grabbing manipulator, 32 is the shearing body, 33 is the feeding clamp, 34 is the first gantry frame, 35 is the flipping frame, 36 is the guiding slope, 37 is the second gantry frame, 38 is the robotic arm, 39 is the loading and unloading clamp, 39a is the clamping cylinder, 39b is the lower clamping seat, 39c is the upper clamping seat, 40 is the conveying and positioning line, 40a is the side fixing frame, 40b is the conveyor belt, 41 is the bending manipulator, 42 is the suction cup frame, 43 is the positioning table, 43a is the positioning strip, 44 is the bending machine, 45 is the flanging table, 46 is the stacking pallet, 47 is the sheet material. Embodiment

[0033] such as Figure 1-14As shown in the figure, it is a punching, shearing and folding sheet metal automatic production line, which includes a punch loading unit, a CNC turret punch press, a CNC shearing center and a folding unit arranged in sequence from front to back. The punch loading unit is correspondingly arranged opposite to the CNC turret punch press. The CNC turret punch press is correspondingly arranged opposite to the CNC shearing center. A loading and unloading unit is correspondingly arranged opposite to the CNC shearing center. The loading and unloading unit is also correspondingly arranged opposite to the CNC turret punch press. A conveying and positioning line 40 is correspondingly arranged at the discharge end of the CNC shearing center. The discharge end of the conveying and positioning line 40 is correspondingly arranged opposite to the folding unit.

[0034] The punch loading unit includes a loading positioning device. The loading positioning device includes a number of rectangular support seats 1 arranged horizontally on the ground. A number of positioning rods 2 forming an L shape are correspondingly arranged on the outer periphery of each support seat 1. The mounting plate 14 at the lower end of the positioning rod 2 is fixedly connected to the L-shaped lower seat plate 3 through at least two fasteners. A number of waist-shaped slots 4 are opened on the lower seat plate 3 corresponding to each fastener. A rotary magnetic sheet separation device 5 is arranged on the lower seat plate 3 corresponding to each support seat 1. The upper sides of the support seats 1 form a support surface. The sheet materials 47 are stacked on the support seats 1. The positioning rods 2 physically position the sheet materials 47. The rotary magnetic sheet separation device controls the magnetic force to facilitate the suction cup to suck away the upper-layer sheet materials 47. A loading manipulator 6 is correspondingly arranged opposite to the loading positioning device. The loading manipulator 6 includes a vertical frame 6a. A fixed beam 6b is horizontally arranged on the upper part of the frame. Two horizontal guide rails 7 are arranged in parallel on the fixed beam 6b. A moving seat 9 is movably connected to the two guide rails 7 through sliders. A horizontal rack 8 is also arranged on the fixed beam 6b between the two guide rails 7. A lifting column 10 is movably connected to the moving seat 9. An adsorption bracket 11 is horizontally arranged at the lower end of the lifting column 10. A number of main suction cups 12 are arranged on the lower surface of the adsorption bracket 11. A number of groups of vibration sheet separation mechanisms and oblique pushing mechanisms are also arranged on the lower surface of the adsorption bracket 11. Two reduction motors are arranged on the moving seat 9. A gear meshing with the horizontal rack 8 is arranged at the output end of one reduction motor. A vertical rack is arranged on the side surface of the lifting column 10. A gear meshing with the vertical rack is arranged at the output end of the other reduction motor. The loading manipulator 6 mainly drives vertical and horizontal movements through a servo motor to adsorb the sheet materials 47 for loading the punch. To facilitate the installation of each suction cup, the adsorption bracket 11 includes a rectangular main bracket 11a. A number of longitudinal sub-beams 11b are arranged at intervals horizontally on the lower side of the main bracket 11a. A number of L-shaped reinforcing angle irons 13 connecting the corresponding longitudinal sub-beams 11b are arranged on both the left and right sides of the main bracket 11a. A number of main suction cups 12 are arranged longitudinally on the lower side of each longitudinal sub-beam 11b.

[0035] In order to separate the sheet materials 47 during the loading of the punching machine and ensure the accuracy of the loading operation, at least two sets of vibration separation mechanisms are arranged on the longitudinal separating beam 11b close to the CNC turret punching machine. Each vibration separation mechanism corresponds to each positioning rod 2 that forms an L shape. The vibration separation mechanism includes a mounting plate 14 fixed on the outer side of the longitudinal separating beam 11b. A vertical lifting rod 15 penetrating the mounting plate 14 is movably connected to the mounting plate 14. A separation suction cup 16 is provided at the lower end of the lifting rod 15. A first spring 17 is sleeved on the outer periphery of the lifting rod 15. The upper and lower ends of the first spring 17 are elastically abutted against the mounting plate 14 and the suction cup seat 16a of the separation suction cup 16 respectively. A separation cylinder 18 is vertically arranged on the lower side of the mounting plate 14. The piston rod of the separation cylinder 18 passes upward through the mounting plate 14 and is connected with a transmission plate 19. The other end of the transmission plate 19 is connected to the upper end of the lifting rod 15. A connecting rod 20 vertically arranged upward and passing through the longitudinal separating beam 11b is provided on the upper part of the suction cup seat 16a of each main suction cup 12. The connecting rod 20 is movably connected to the longitudinal separating beam 11b. A limit seat 20a in contact with the longitudinal separating beam 11b is provided at the upper end of the connecting rod 20. A second spring 21 is sleeved on the outer periphery of the connecting rod 20. The upper and lower ends of the second spring 21 are elastically abutted against the longitudinal separating beam 11b and the suction cup seat 16a of the main suction cup 12 respectively. At least three sets of oblique pushing mechanisms are provided. Each oblique pushing mechanism is arranged at one end of the left side of the main support 11a close to the CNC turret punching machine. Each oblique pushing mechanism corresponds to the CNC turret punching machine. Each set of the oblique pushing mechanisms is respectively located between the corresponding adjacent two longitudinal separating beams 11b. The oblique pushing mechanism includes a side base frame 22 fixed on the main support 11a. A vertical separating cylinder 23 is installed on the side base frame 22. The piston rod of the separating cylinder 23 extends downward and is provided with a mounting frame 24. An oblique pushing cylinder 25 is installed below the mounting frame 24. The cylinder body of the oblique pushing cylinder 25 is rotationally connected to the mounting frame 24 through a rotating shaft 26. An L-shaped limit frame 27 is arranged on the side surface of the mounting frame 24 corresponding to the oblique pushing cylinder 25. An oblique pushing suction cup 29 and a rotatable guide wheel 28 are provided at the end of the piston rod of the oblique pushing cylinder 25. The guide wheel 28 is located above the oblique pushing suction cup 29. The guide wheel 28 keeps in contact with the limiting part 27a of the limit frame 27. The oblique pushing cylinder 25 is obliquely arranged. When sucking the sheet material 47, the oblique pushing suction cup 29, the main suction cup 12 and the separation suction cup 16 are arranged in the same plane.The oblique push suction cup 29, the main suction cup 12, and the sheet separation suction cup 16 are all vacuum suction cups; multiple suction cups are arranged on the loading manipulator 6. The main suction cup 12 adsorbs the sheet material 47. The sheet separation cylinder 18 drives the transmission plate 19 to vibrate up and down, and the lifting rod 15 drives the sheet separation suction cup 16 to move up and down to shake off the possible phenomenon of multiple sheets. The limit frame 27 of the oblique push mechanism includes a main frame and a sub-frame. A waist-shaped slot 4 is opened on the sub-frame, and a fastener passes through the waist-shaped slot 4 to connect with the main frame. The position of the sub-frame relative to the main frame is adjustable. The oblique push suction cup 29 and the guide wheel 28 are respectively installed at the lower and upper parts of the support at the end of the piston rod of the oblique push cylinder 25. After the manipulator moves to the punch clamp mouth, the separation cylinder 23 of the oblique push mechanism drives the mounting frame 24 to descend, pressing down the oblique push suction cup 29, and the rotating shaft 26 pushes the material at different angles adaptively, while the limit mechanism limits the direction and angle within this range. Due to the certain flexibility and elasticity of the cylinder, after movement, the edge of the sheet material 47 can be reliably pushed into the clamp mouth of the clamp, and the sheet material is pushed into the clamp mouth of the punch through the material pushing movement; for the double-sheet detection mechanism, the thickness of the sheet material is measured through a mechanical structure equipped with an encoder, and relevant values are compared to confirm whether multiple sheets are grabbed.

[0036] In order to punch the sheet material 47, the CNC turret punch press includes a punch press body 30, and a material grabbing manipulator 31 capable of grabbing the sheet material 47 and moving horizontally is arranged on the punch press body 30. The material grabbing manipulator 31 is located on the left side of the punch press body 30 and is arranged corresponding to the punch press loading unit.

[0037] In order to cut the sheet material 47 into a required specified area, the CNC shearing center includes a shearing machine body 32. A plurality of feeding clamps 33 capable of grabbing the sheet material 47 and moving longitudinally are arranged at intervals along the transverse direction on the shearing machine body 32. A gantry frame one 34 is arranged corresponding to the shearing machine body 32, and a shearing tool is arranged on the gantry frame one 34. A plurality of turning frames 35 are arranged at equal intervals transversely corresponding to the gantry frame one 34 on the shearing machine body 32. A guiding slope 36 is arranged at the tail end of the shearing machine body 32; the loading and unloading unit includes a gantry frame two 37 corresponding to the shearing machine body 32. A mechanical arm 38 capable of moving horizontally is arranged on the gantry frame two 37. The mechanical arm 38 is arranged longitudinally, and at least two loading and unloading clamps 39 are arranged at intervals longitudinally on the mechanical arm 38. The loading and unloading clamp 39 includes a clamping cylinder 39a, and a lower clamping seat 39b is arranged at the protruding end of the piston rod of the clamping cylinder 39a. An upper clamping seat 39c is arranged on the cylinder body of the clamping cylinder 39a corresponding to the lower clamping seat 39b. The loading and unloading unit sends the punched sheet material 47 to the shearing machine body 32. The feeding clamp 33 drives the sheet material 47 to move backward. The shearing tool shears the sheet material 47, and the turning frame 35 turns so that the sheared sheet material 47 falls onto the conveying and positioning line 40 through the guiding slope 36.

[0038] In order to send the sheet metal 47 to the bending unit, the conveying and positioning line 40 is arranged horizontally, corresponding to the guiding ramp 36. The conveying and positioning line 40 includes two side fixing frames 40a corresponding to each other on the left and right. A conveyor belt 40b is arranged between the two side fixing frames 40a. A number of vertical positioning rods 2 are arranged at intervals horizontally on the outer side fixing frame 40a.

[0039] In order to automatically bend the sheet metal 47 and perform finished product stacking, the bending unit includes a bending machine 44 and a manipulator 41. The bending machine 44 and the manipulator 41 are arranged corresponding to the discharge end of the conveying and positioning line 40. A suction cup holder 42 is arranged at the end of the bending machine 44 and the manipulator 41. A plurality of vacuum suction cups are densely arranged on the suction cup holder 42. A positioning table 43, a bending machine 44 and a flanging table 45 are respectively arranged corresponding to the bending machine 44 and the manipulator 41. The positioning table 43 is arranged obliquely and a positioning strip 43a in an L shape is arranged on the outer periphery of the positioning table 43. The finished product after bending is placed on the stacking tray 46.

[0040] The punching, shearing and bending sheet metal automatic production line of the present invention mainly includes: a punching loading unit, a numerical control turret punch press, a punching and shearing loading and unloading unit, a numerical control shearing center, a conveying and positioning line 40, and a bending unit, a total of six major parts. The entire working process is as follows: The workshop crane or forklift loads the sheet material raw material onto the loading positioning device of the punching loading unit - the suction cup of the loading manipulator 6 acts, picks up the material from the raw material table, and after magnetic sheet separation and thickness measurement, is sent into the numerical control turret punch press through the inclined material pushing device - the clamping pliers of the numerical control turret punch press clamp the sheet material and perform punching or forming processing on the sheet material - after the numerical control turret punch press finishes processing, the sheet material is sent to the unloading side of the workbench - the punching and shearing loading and unloading unit clamps the sheet material and drags it to the crossbeam of the numerical control shearing center - the numerical control shearing center cuts the sheet material into specified sizes according to actual requirements - the sheet material is transported through the numerical control shearing center and then falls to the conveying and positioning line 40 - after initial positioning, a stack of sheet materials is transported to the loading position of the bending unit - the robot of the bending unit grabs the sheet material through the suction cup, and after positioning, sends it into the bending machine 44 for bending - after bending, the robot uses the suction cup gripper to stack the formed sheet materials neatly. Thus, the processing process ends.

[0041] The punching loading unit is mainly used to load the sheet metal 47 onto the numerical control turret punch press, and includes a loading positioning device, a gantry movement mechanism, a loading manipulator 6 (including an inclined material pushing mechanism and a sheet separation mechanism), and a double-sheet detection mechanism. The loading positioning device provides positioning of the raw material and includes a rotary magnetic sheet separation device. The gantry mechanism mainly makes vertical and horizontal movements driven by a servo motor. The loading manipulator 6 is provided with a material grabbing suction cup and a power suction cup, mainly for sucking the sheet metal 47 and sheet separation movement. The double-sheet detection mechanism measures the thickness of the sheet material through a mechanical structure equipped with an encoder, and compares relevant values to confirm whether multiple sheets are grabbed.

[0042] The CNC turret punch press is mainly used for processing such as punching and forming of plates. To meet the requirements of this production line, the clamp is equipped with a clamp picking judgment device and a clamp pressing device, so that the plates of the loading unit of the punch press can be smoothly picked up, and a loading success signal is given.

[0043] The punching and shearing loading and unloading unit is mainly used for unloading of the CNC turret punch press and loading of the CNC shearing center, and includes a carriage moving device and a clamp. The carriage moving device and the clamp pick up the plate. The clamp jaw is equipped with an anti-dropping switch to ensure that the plate processed on the CNC turret punch press is dragged into the CNC shearing center and sent into its jaw.

[0044] The CNC shearing center consists of a front feeding mechanism, a CNC shearing machine, and a rear stop and conveying mechanism. The front feeding mechanism mainly drives the clamp through the cross beam to perform the feeding operation and send it into the shearing machine for processing. The rear stop and conveying mechanism can convey the sheared plate to the next process through the belt movement, and is equipped with a waste separation mechanism to separate the finished plate and the waste plate for storage.

[0045] The conveying and positioning line 40 is equipped with a positioning device and a powered conveying line. When the plate slides down, the positioning device performs preliminary positioning on the plate, and can initially stack a stack of plates neatly. After a stack of plates is blanked, the conveying line conveys the plate to the bending process.

[0046] The bending center is equipped with a robot, a bending gripper, a positioning table 43, a bending machine 44, and a flanging rack. After the robot grabs the plate on the conveying line and places it on the positioning table 43 for positioning, it then grabs the workpiece for bending. According to different bending directions, the flanging rack is used. After bending and forming, it is stacked neatly onto the finished product tray.

[0047] The main processing technology of the punching, shearing and folding sheet metal automatic production line of the present invention takes the bridge product as an example. The bridge product is fed into the CNC turret punch press through the loading unit for punching the wire arrangement holes and connection holes. After punching, it is transferred to the shearing center through the punching and shearing loading and unloading unit for shearing operation to form a semi-finished bridge. After being initially positioned by the positioning and conveying line, it is conveyed to the bending center. The robot grabs the plate for secondary positioning and bending operations, and stacks it neatly, and finally forms a finished bridge. There is no manual operation in the middle, and all transfer positioning and processing are completed automatically. The product quality is stable, the production efficiency is greatly improved, and no manual assistance is required.

[0048] The present invention is not limited to the above embodiments. Based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and deformations to some technical features without creative labor according to the disclosed technical content, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. An automated production line for punching, shearing and folding sheet metal, characterized in that, It includes a punching feeding unit, a CNC turret punch press, a CNC shearing center and a bending unit arranged in sequence from front to back. The punching feeding unit is arranged corresponding to the CNC turret punch press. The CNC turret punch press is arranged corresponding to the CNC shearing center. A loading and unloading unit is arranged corresponding to the CNC shearing center, and the loading and unloading unit is also arranged corresponding to the CNC turret punch press. A conveying and positioning line is arranged corresponding to the discharging end of the CNC shearing center, and the discharging end of the conveying and positioning line is arranged corresponding to the bending unit. The punching feeding unit includes a feeding positioning device. The feeding positioning device includes a number of rectangular support seats arranged horizontally on the ground. A number of L-shaped positioning rods are arranged corresponding to the outer periphery of each support seat. The mounting plate at the lower end of the positioning rod is fixedly connected to the L-shaped lower seat plate through at least two fasteners. A number of waist-shaped grooves are opened on the lower seat plate corresponding to each fastener. A rotary magnetic sheet separation device is arranged on the lower seat plate corresponding to each support seat. A feeding manipulator is arranged corresponding to the feeding positioning device. The feeding manipulator includes a vertical frame. A fixed beam is horizontally arranged at the upper part of the frame. Two horizontal guide rails are arranged in parallel on the fixed beam. A moving seat is movably connected to the two guide rails through sliders. A horizontal rack is also arranged on the fixed beam between the two guide rails. A lifting column is movably connected to the moving seat. An adsorption bracket is horizontally arranged at the lower end of the lifting column. A number of main suction cups are arranged on the lower surface of the adsorption bracket. A number of groups of vibration sheet separation mechanisms and inclined push mechanisms are also arranged on the lower surface of the adsorption bracket. The adsorption bracket includes a rectangular main bracket. A number of longitudinal sub-beams are arranged at intervals horizontally on the lower side of the main bracket. L-shaped reinforcing angle irons connecting the corresponding longitudinal sub-beams are arranged on both the left and right sides of the main bracket. A number of main suction cups are arranged longitudinally on the lower side of each longitudinal sub-beam. At least two groups of vibration sheet separation mechanisms are arranged on the longitudinal sub-beam close to the CNC turret punch press. Each vibration sheet separation mechanism is arranged corresponding to each L-shaped positioning rod. The vibration sheet separation mechanism includes a mounting plate fixed on the outer side of the longitudinal sub-beam. A vertical lifting rod passing through the mounting plate is movably connected to the mounting plate. A sheet separation suction cup is arranged at the lower end of the lifting rod. A first spring is sleeved on the outer periphery of the lifting rod. The upper and lower ends of the first spring are elastically abutted against the mounting plate and the suction cup seat of the sheet separation suction cup respectively. A sheet separation cylinder is vertically arranged on the lower side of the mounting plate. The piston rod of the sheet separation cylinder passes through the mounting plate upward and is connected to a transmission plate. The other end of the transmission plate is connected to the upper end of the lifting rod. A connecting rod passing through the longitudinal sub-beam upward is vertically arranged on the upper part of the suction cup seat of each main suction cup. The connecting rod is movably connected to the longitudinal sub-beam. A limit seat contacting the longitudinal sub-beam is arranged at the upper end of the connecting rod. A second spring is sleeved on the outer periphery of the connecting rod. The upper and lower ends of the second spring are elastically abutted against the longitudinal sub-beam and the suction cup seat of the main suction cup respectively.There are at least three sets of the inclined pushing mechanisms, and each inclined pushing mechanism is arranged at one end of the left side of the main bracket close to the CNC turret punch press. Each inclined pushing mechanism is arranged corresponding to the CNC turret punch press. Each set of the inclined pushing mechanisms is respectively located between two adjacent sub-longitudinal beams. The inclined pushing mechanism includes a side base frame fixed on the main bracket. A vertical separating cylinder is installed on the side base frame. The piston rod of the separating cylinder extends downward and is provided with a mounting frame. An inclined pushing cylinder is installed below the mounting frame. The cylinder body of the inclined pushing cylinder is rotationally connected to the mounting frame through a rotating shaft. An L-shaped limiting frame is arranged on the side surface of the mounting frame corresponding to the inclined pushing cylinder. The end of the piston rod of the inclined pushing cylinder is provided with an inclined pushing suction cup and a rotatable guiding wheel. The guiding wheel is located above the inclined pushing suction cup. The guiding wheel keeps in contact with the limiting part of the limiting frame. The inclined pushing cylinder is inclined. When sucking the sheet material, the inclined pushing suction cup, the main suction cup and the separating suction cup are arranged in the same plane.

2. The automatic production line for punching, shearing and folding sheet metal according to claim 1, characterized in that, The numerically controlled turret punch press includes a punch press body, and a material grabbing manipulator capable of grabbing a sheet material and moving horizontally is arranged on the punch press body. The material grabbing manipulator is located on the left side of the punch press body and is arranged corresponding to the loading unit of the punch press.

3. The automatic punching, shearing and folding sheet metal production line according to claim 1 or 2, characterized in that, The numerically controlled shearing center includes a shearing machine body. A plurality of feeding clamps capable of grabbing a sheet material and moving longitudinally are arranged on the shearing machine body at intervals in the transverse direction. A first gantry frame is arranged corresponding to the shearing machine body. A shearing tool is arranged on the first gantry frame. A plurality of turnover frames are arranged on the shearing machine body at equal intervals in the transverse direction corresponding to the first gantry frame. A guiding slope is arranged at the tail end of the shearing machine body. The loading and unloading unit includes a second gantry frame corresponding to the shearing machine body. A mechanical arm capable of moving horizontally is arranged on the second gantry frame. The mechanical arm is arranged longitudinally. At least two loading and unloading clamps are arranged on the mechanical arm at intervals in the longitudinal direction. The loading and unloading clamp includes a clamping cylinder. A lower clamping seat is arranged at the extending end of the piston rod of the clamping cylinder. An upper clamping seat is arranged on the cylinder body of the clamping cylinder corresponding to the lower clamping seat.

4. An automatic production line for punching, shearing and folding sheet metal according to claim 3, characterized in that The conveying and positioning line is arranged horizontally and corresponds to the guiding slope. The conveying and positioning line includes two side fixing frames corresponding to each other on the left and right. A conveyor belt is arranged between the two side fixing frames. A plurality of vertical positioning rods are arranged on the outer side fixing frame at intervals in the transverse direction.

5. The automatic production line for punching, shearing and folding sheet metal according to claim 4, characterized in that The bending unit includes a bending manipulator. The bending manipulator is arranged corresponding to the discharging end of the conveying and positioning line. A suction cup frame is arranged at the end of the bending manipulator. A plurality of vacuum suction cups are arranged densely on the suction cup frame. A positioning table, a bending machine and a flanging table are respectively arranged corresponding to the bending manipulator. The positioning table is arranged obliquely, and a positioning strip surrounding an L shape is arranged on the outer periphery of the positioning table. The finished product after bending is placed on a pallet for stacking.

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