A metal piece stamping machining device based on double-station machining and a method of using the same

Abstract

The application discloses a metal piece stamping machining equipment based on double-station machining and a use method thereof, and belongs to the technical field of mechanical part machining and forming, and comprises a support, a burr pressing and protrusion extracting assembly, a bending assembly, a material conveying assembly, a feeding table, a discharging slide upper die support plate, a damping rod and a sleeve; the burr pressing and protrusion extracting assembly comprises a first lower die assembly and a first upper die assembly; the bottom rear end of the upper die support plate is connected with the top of the first upper die assembly, and the top rear end of the support is connected with the bottom of the first lower die assembly; the limiting end of the first lower die assembly corresponds to the middle axis position of the limiting end of the first upper die assembly. Through the above manner, the workpiece is pressed into the pressing groove end of the first lower die assembly to press the burr while the punch end of the first upper die assembly extracts the protrusion, so that two-step machining can be simultaneously completed on the workpiece which needs to be pressed and extracted; through the double-station arrangement, two groups of workpieces can be simultaneously machined, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical part processing forming, in particular to a metal piece stamping processing equipment based on double-station processing and a using method thereof. BACKGROUND

[0002] After the metal piece is cut and formed, a stamping device needs to be used to press the burr to remove the burr generated by cutting. For part punching, the hole needs to be punched to make the material around the hole position flange, adjust the hole diameter, and facilitate the tapping.

[0003] The invention with publication number CN104826935B discloses a support burr pressing die, which presses the support into the cavity of the corresponding burr pressing structure by the lower pressing of the upper die plate, thereby performing burr pressing treatment on the workpiece.

[0004] However, the above-mentioned invention only realizes the function of pressing the burr, and when some special-shaped metal pieces need to be pressed and punched, it needs to be processed step by step, and only one workpiece is processed at a time, which is low in efficiency.

[0005] Therefore, the present application designs a metal piece stamping processing equipment based on double-station processing and a using method thereof to solve the above-mentioned problems. SUMMARY

[0006] In view of the above-mentioned shortcomings of the prior art, the present application provides a metal piece stamping processing equipment based on double-station processing and a using method thereof.

[0007] To achieve the above-mentioned purposes, the present application is realized by the following technical solutions:

[0008] A metal piece stamping processing equipment based on double-station processing, comprising a support;

[0009] The top of the support is connected with the bottom of the lower die end of a burr pressing and punching assembly for pressing the burr of the edge of the workpiece and punching the workpiece through the hole, and a bending assembly for bending the workpiece;

[0010] A upper die support plate for supporting the upper die is installed directly above the support, the bottom of the upper die support plate is connected with the top of the upper die end of the burr pressing and punching assembly and the bending assembly, and the top of the upper die support plate is connected with the external hydraulic assembly;

[0011] The bottom of the upper die support plate is fixedly connected with the top of a plurality of shock-absorbing rods for buffering the upper die support plate, and the shock-absorbing rods are symmetrically installed on the left and right sides of the upper die end of the burr pressing and punching assembly and the bending assembly;

[0012] The top of the support is fixedly connected with the bottom of a plurality of sleeves for inserting the shock-absorbing rods, and the sleeves correspond one by one to the axial positions of the shock-absorbing rods;

[0013] The right side of the support is provided with a conveying assembly for conveying workpieces;

[0014] The front and rear ends of the support are respectively provided with a discharging chute for discharging and a feeding table for placing workpieces to be processed;

[0015] The burr trimming and protrusion drawing assembly comprises a first lower die assembly and a first upper die assembly; the bottom rear end of the upper die support plate is connected to the top of the first upper die assembly, and the top rear end of the support is connected to the bottom of the first lower die assembly; the limiting end of the first lower die assembly corresponds to the position of the central axis of the limiting end of the first upper die assembly.

[0016] Further, the first lower die assembly comprises a first punching positioning block, a pressing groove, a first punching positioning pin, a punch avoiding hole, a punching limiting hole, a punching lower die plate, a punching lower die support plate, a punching ejection spring, a punching ejection plate, a second punching positioning block and a second punching positioning pin; the top rear end of the support is fixedly connected to the bottom of the punching lower die support plate, and the top of the punching lower die support plate is fixedly connected to the bottom of the punching lower die plate; four groups of first punching positioning blocks are installed on the top left side of the punching lower die plate, and four groups of second punching positioning blocks are installed on the top right side of the punching lower die plate; the bottoms of the first punching positioning blocks and the second punching positioning blocks are fixedly connected to the top of the punching lower die plate, and the inner end side walls of the first punching positioning blocks and the second punching positioning blocks are respectively in contact connection with the side walls of the external workpieces; the top left and right sides of the first punching positioning blocks are respectively provided with a pressing groove, and the inner walls of the pressing grooves are in sliding connection with the side walls of the punching ejection plate; three groups of first punching positioning pins and three groups of second punching positioning pins are respectively installed on the top left and right sides of the punching lower die support plate, and the bottoms of the first punching positioning pins and the second punching positioning pins are fixedly connected to the top of the punching lower die support plate; the positions of the first punching positioning pins and the second punching positioning pins respectively correspond to the positioning holes of the external workpieces; the punching ejection plates on the left and right sides are respectively provided with through holes in sliding connection with the side walls of the first punching positioning pins and the second punching positioning pins; the bottoms of the punching ejection plates are connected to the upper ends of one or more groups of punching ejection springs, and the lower ends of the punching ejection springs are connected to the top of the punching lower die support plate; the top of the punching ejection plate on the left side is provided with four punch avoiding holes corresponding to the positions of the holes to be drawn on the external workpieces; the top of the punching lower die plate is symmetrically provided with punching limiting holes.

[0017] Further, the upper and lower ends of the punching ejection spring are respectively in contact connection with the bottom of the punching ejection plate and the top of the punching lower die support plate.

[0018] Further, the first upper die assembly comprises a first punching positioning slot, a punch, a first punching positioning hole, a punching limiting rod, a punching upper die plate, a second punching positioning slot and a second punching positioning hole; the bottom rear end of the upper die support plate is fixedly connected with the top of the punching upper die plate; the bottom of the punching upper die plate is provided with four groups of first punching positioning slots and four groups of second punching positioning slots which are matched with the first punching positioning block and the second punching positioning block in position and shape; the bottom of the punching upper die plate is provided with three groups of first punching positioning holes and three groups of second punching positioning holes which are matched with the first punching positioning pin and the second punching positioning pin in position and shape; the bottom of the punching upper die plate is provided with four groups of punches which are matched with the punch avoiding hole in position and shape, and the top of the punch is fixedly connected with the bottom of the punching upper die plate; the bottom of the punching upper die plate is symmetrically provided with the punching limiting rod, and the top of the punching limiting rod is fixedly connected with the bottom of the punching upper die plate, and the punching limiting rod corresponds to the central axis of the punching limiting hole in position.

[0019] Further, the bending assembly comprises a second lower die assembly and a second upper die assembly; the bottom front end of the upper die support plate is connected with the top of the second upper die assembly, and the top front end of the support is connected with the bottom of the second lower die assembly; the limiting end of the second lower die assembly corresponds to the central axis position of the limiting end of the second upper die assembly.

[0020] Further, the second lower die assembly comprises bending positioning blocks, bending stripper plates, bending positioning pins, punching limiting pins, step positioning pins, bending limiting holes, a bending lower die plate, a bending lower die support plate, bending stripper springs, stripper grooves, step positioning blocks, and pressing block grooves; the top front end of the support is fixedly connected to the bottom of the bending lower die support plate, and the top of the bending lower die support plate is fixedly connected to the bottom of the bending lower die plate; four groups of bending positioning blocks are mounted on the top left side of the bending lower die plate, and four groups of step positioning blocks are mounted on the top right side of the stamping lower die plate; the bottoms of the bending positioning blocks and the step positioning blocks are fixedly connected to the top of the bending lower die plate, and the inner end sidewalls of the bending positioning blocks and the step positioning blocks are respectively in contact connection with the sidewalls of the external workpieces; two groups of stripper grooves are formed in the left top of the bending lower die plate, and the inner walls of the stripper grooves are in sliding connection with the sidewalls of the bending stripper plates; the top left side of the bending lower die support plate is fixedly connected to the bottoms of the two groups of bending positioning pins, and the positions of the bending positioning pins correspond to the positioning holes of the external workpieces; the tops of the bending stripper plates are each provided with through holes in sliding connection with the sidewalls of the bending positioning pins; the bottoms of the bending stripper plates are each connected to the upper ends of one or more groups of bending stripper springs, and the lower ends of the bending stripper springs are connected to the top of the bending lower die support plate; four groups of punching limiting pins are mounted on the top left side of the bending lower die plate and match the shapes and positions of the protruding through holes of the external workpieces, and the bottoms of the punching limiting pins are fixedly connected to the top of the bending lower die plate; the pressing block grooves are formed in the top left side of the bending lower die plate; the step positioning pins corresponding to the positions of the workpiece positioning holes are mounted on the top right side of the bending lower die plate, and the bottoms of the step positioning pins are fixedly connected to the top of the bending lower die plate; the bending limiting holes are symmetrically formed in the top of the bending lower die plate.

[0021] Further, the upper and lower ends of the bending stripper springs are respectively in contact connection with the bottom of the bending stripper plate and the top of the bending lower die support plate.

[0022] Further, the second upper die assembly comprises bending positioning grooves, pressing blocks, bending positioning holes, limiting pin avoiding holes, bending limiting rods, and a bending upper die plate; the bottom front end of the upper die support plate is fixedly connected to the top of the bending upper die plate, and the bottom of the bending upper die plate is provided with four groups of bending positioning grooves matching the positions and shapes of the bending positioning blocks; the bottom of the bending upper die plate is mounted with pressing blocks matching the positions and shapes of the pressing block grooves, and the top of the pressing blocks is fixedly connected to the bottom of the bending upper die plate; the bottom of the pressing blocks is provided with two groups of bending positioning holes matching the positions and shapes of the bending positioning pins; the bottom of the pressing blocks is provided with four groups of limiting pin avoiding holes matching the positions and shapes of the punching limiting pins; the bottom left side of the bending upper die plate is fixedly connected to the top of the bending limiting rod, and the bending limiting rod corresponds to the position of the central axis of the bending limiting hole on the left side.

[0023] Further, the material conveying assembly comprises a mechanical arm, a support rod and a suction cup; the right side of the support is provided with the mechanical arm; the left side wall of the mechanical arm is provided with three groups of support rods, and the right end side wall of the support rod is fixedly connected with the left side wall of the mechanical arm; the bottom of the support rod is fixedly connected with a plurality of suction cups.

[0024] A use method of a metal piece stamping machining equipment based on a double-station machining, comprising the following steps:

[0025] Step one, start the material conveying assembly, the suction cup end of the material conveying assembly moves the two groups of workpieces on the feeding table above the stamping lower die plate of the first lower die assembly, then lowers them, so that the side walls of the two groups of workpieces are in contact with the inner end side walls of the first stamping positioning block and the second stamping positioning block respectively, and the inner walls of the positioning holes of the two groups of workpieces are in contact with the side walls of the first stamping positioning pin and the second stamping positioning pin respectively, so that the workpieces are positioned, then the external hydraulic assembly drives the upper die support plate to press down, so that the shock absorbing rod is inserted into the sleeve and is compressed, then the upper die support plate drives the stamping upper die plate of the first upper die assembly to continue to slowly press down, so that the stamping limiting hole and the stamping limiting rod are inserted and limited, then the first stamping positioning block and the first stamping positioning groove, the first stamping positioning pin and the first stamping positioning hole, the second stamping positioning block and the second stamping positioning groove, and the second stamping positioning pin and the second stamping positioning hole are inserted and matched with each other, the stamping upper die plate presses down the workpieces, so that the workpieces are pressed into the pressing groove to press the burr, at the same time, the stamping stripping plate is lowered, so that the stamping stripping spring is compressed; the workpiece located on the left side is punched at the same time of pressing the burr, the through hole corresponding to the position of the punch is punched, and the punch avoiding hole avoids the punch; after the burr pressing and the punching are completed, the stamping upper die plate is lifted up, the components are separated from each other, the stamping stripping spring rebounds, drives the stamping stripping plate to slide up along the pressing groove, and the workpiece is ejected; then the material conveying assembly transports the workpiece processed in the first process to the machining surface of the bending assembly for further processing;

[0026] Step two, when the workpiece is placed above the bending lower die plate, the side walls of the two groups of workpieces are in contact with the inner end side walls of the bending positioning block and the empty step positioning block respectively, the inner walls of the positioning holes of the two groups of workpieces are in contact with the side walls of the bending positioning pin and the empty step positioning pin respectively, and the inner wall of the punching through hole of the workpiece located on the left side is in contact with the side wall of the punching limiting pin, so that the workpiece is positioned; at this time, the bottom of the workpiece located on the left side is in contact with the top of the bending stripping plate; then the bending upper die plate of the second upper die assembly is pressed down, the bending positioning block and the bending positioning groove, the bending positioning pin and the bending positioning hole, the punching limiting pin and the limiting pin avoiding hole, the bending limiting hole and the bending limiting rod are inserted and matched, the bending upper die plate presses down the workpiece, the pressing block is pressed into the pressing block groove to bend the workpiece, the bending stripping plate slides down along the stripping groove and makes the bending stripping spring compressed; after the bending is completed, the bending upper die plate is lifted up, the bending stripping spring rebounds to make the bending stripping plate lift up and eject the workpiece, then the material conveying assembly transports the processed workpiece to the unloading slide for unloading.

[0027] Advantages

[0028] The present application moves two groups of workpieces on the feeding table to the machining surface of the first lower mold assembly through the suction cup end of the feeding assembly, and then places them down, so that the side walls of the two groups of workpieces are positioned with the positioning end of the first lower mold assembly, and the workpieces are positioned, then the upper mold support plate is pressed down by the external hydraulic assembly, so that the shock absorbing rod is inserted into the sleeve and compressed, then the first upper mold assembly is continuously pressed down by the upper mold support plate, the limiting ends of the first lower mold assembly and the first upper mold assembly are inserted and limited with each other, the workpieces are pressed down by the first upper mold assembly, so that the workpieces are sunk into the pressing groove end of the first lower mold assembly to press the burr, and at the same time the punch end of the first upper mold assembly performs the punching, so that the workpieces needing to press the burr and punch can complete two-step processing at the same time; through the double-station arrangement, two groups of workpieces can be processed at the same time, and the production efficiency is improved.

[0029] The present application can simultaneously transfer workpieces at different positions to the next process at the same time through the operation of multiple support rods, thereby improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0031] Figure 1 It is a perspective view of a metal piece stamping processing equipment main structure based on double-station processing of the present application;

[0032] Figure 2 It is a front view of a metal piece stamping processing equipment structure based on double-station processing of the present application;

[0033] Figure 3 It is a left view of a metal piece stamping processing equipment structure based on double-station processing of the present application;

[0034] Figure 4 It is a sectional view along the A-A direction of Figure 3

[0035] Figure 5 It is a first process lower mold structure perspective view of a metal piece stamping processing equipment based on double-station processing of the present application;

[0036] Figure 6 It is a first process lower mold structure half-sectional view of a metal piece stamping processing equipment based on double-station processing of the present application;

[0037] ​Figure 7 It is a first process upper die structure perspective view of a metal piece stamping processing equipment based on double-station processing of the application;

[0038] Figure 8 It is a second process lower die structure perspective view of a metal piece stamping processing equipment based on double-station processing of the application;

[0039] Figure 9 It is a second process lower die structure half-section view of a metal piece stamping processing equipment based on double-station processing of the application;

[0040] Figure 10 It is a second process upper die structure perspective view of a metal piece stamping processing equipment based on double-station processing of the application;

[0041] Figure 11 It is a first workpiece structure perspective view of a metal piece stamping processing equipment based on double-station processing of the application;

[0042] Figure 12 It is a second workpiece structure perspective view of a metal piece stamping processing equipment based on double-station processing of the application.

[0043] The numbers in the figures respectively represent:

[0044] 1, support; 2, burr pressing and protruding assembly; 21, first lower die assembly; 211, first stamping positioning block; 212, pressing groove; 213, first stamping positioning pin; 214, punch avoiding hole; 215, stamping limiting hole; 216, stamping lower die plate; 217, stamping lower die support plate; 218, stamping stripping spring; 219, stamping stripping plate; 2110, second stamping positioning block; 2111, second stamping positioning pin; 22, first upper die assembly; 221, first stamping positioning groove; 222, punch; 223, first stamping positioning hole; 224, stamping limiting rod; 225, stamping upper die plate; 226, second stamping positioning groove; 227, second stamping positioning hole; 3, bending assembly; 31, second lower die assembly; 311, bending positioning block; 312, bending stripping plate; 313, bending positioning pin; 314, punching limiting pin; 315, empty-step positioning pin; 316, bending limiting hole; 317, bending lower die plate; 318, bending lower die support plate; 319, bending stripping spring; 3110, stripping groove; 3111, empty-step positioning block; 3112, pressing block groove; 32, second upper die assembly; 321, bending positioning groove; 322, pressing block; 323, bending positioning hole; 324, limiting pin avoiding hole; 325, bending limiting rod; 326, bending upper die plate; 4, material conveying assembly; 41, mechanical arm; 42, support rod; 43, suction cup; 5, feeding table; 6, discharging slide; 7, upper die support plate; 8, damping rod; 9, sleeve; 10, first workpiece; 11, second workpiece. DETAILED DESCRIPTION

[0045] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] The present application will be further described below with reference to the embodiments.

[0047] Embodiment 1

[0048] Please refer to the drawings in the description Figures 1-12 A metal piece stamping machining equipment based on double-station machining, comprising a support 1.

[0049] The top of the support 1 is connected with the bottom of the lower die end of a burr removing and hole punching assembly 2 for burr removing and hole punching of a workpiece edge and a bending assembly 3 for bending of the workpiece.

[0050] A top die support plate 7 for supporting a top die is installed directly above the support 1, the bottom of the top die support plate 7 is connected with the top of the top die end of the burr removing and hole punching assembly 2 and the bending assembly 3, and the top of the top die support plate 7 is connected with an external hydraulic assembly.

[0051] The bottom of the top die support plate 7 is fixedly connected with the top of a plurality of shock-absorbing rods 8 for buffering the top die support plate 7, and the shock-absorbing rods 8 are symmetrically installed on the left and right sides of the top die end of the burr removing and hole punching assembly 2 and the bending assembly 3.

[0052] The top of the support 1 is fixedly connected with the bottom of a plurality of sleeves 9 for inserting the shock-absorbing rods 8, and the sleeves 9 correspond one-to-one with the axial positions of the shock-absorbing rods 8.

[0053] A material conveying assembly 4 for conveying the workpiece is installed on the right side of the support 1.

[0054] A discharging chute 6 for discharging and a feeding table 5 for placing the workpiece to be machined are respectively installed on the front and rear ends of the support 1.

[0055] The burr removing and hole punching assembly 2 comprises a first lower die assembly 21 and a first upper die assembly 22; the bottom rear end of the top die support plate 7 is connected with the top of the first upper die assembly 22, and the top rear end of the support 1 is connected with the bottom of the first lower die assembly 21; the limiting end of the first lower die assembly 21 corresponds to the central axis position of the limiting end of the first upper die assembly 22.

[0056] The first lower die assembly 21 comprises a first stamping positioning block 211, a pressing groove 212, a first stamping positioning pin 213, a punch avoiding hole 214, a stamping limiting hole 215, a stamping lower die plate 216, a stamping lower die support plate 217, a stamping ejection spring 218, a stamping ejection plate 219, a second stamping positioning block 2110 and a second stamping positioning pin 2111; the top rear end of the support 1 is fixedly connected with the bottom of the stamping lower die support plate 217, and the top of the stamping lower die support plate 217 is fixedly connected with the bottom of the stamping lower die plate 216; four groups of first stamping positioning blocks 211 are installed on the top left side of the stamping lower die plate 216, and four groups of second stamping positioning blocks 2110 are installed on the top right side of the stamping lower die plate 216, the bottoms of the first stamping positioning blocks 211 and the second stamping positioning blocks 2110 are fixedly connected with the top of the stamping lower die plate 216, and the inner end side walls of the first stamping positioning blocks 211 and the second stamping positioning blocks 2110 are respectively in contact connection with the side walls of the external workpieces; the pressing grooves 212 are formed in the top left and right sides of the first stamping positioning blocks 211, and the inner walls of the pressing grooves 212 are in sliding connection with the side walls of the stamping ejection plate 219; three groups of first stamping positioning pins 213 and three groups of second stamping positioning pins 2111 are installed on the top left and right sides of the stamping lower die support plate 217, and the bottoms of the first stamping positioning pins 213 and the second stamping positioning pins 2111 are fixedly connected with the top of the stamping lower die support plate 217; the positions of the first stamping positioning pins 213 and the second stamping positioning pins 2111 correspond to the positioning holes of the external workpieces; the left and right groups of stamping ejection plates 219 are respectively provided with through holes in sliding connection with the side walls of the first stamping positioning pins 213 and the second stamping positioning pins 2111; the bottoms of the stamping ejection plates 219 are connected with the upper ends of one or more groups of stamping ejection springs 218, and the lower ends of the stamping ejection springs 218 are connected with the top of the stamping lower die support plate 217; the top of the left stamping ejection plate 219 is provided with four groups of punch avoiding holes 214 corresponding to the positions of the holes to be punched of the external workpieces; the stamping limiting holes 215 are symmetrically formed in the top of the stamping lower die plate 216.

[0057] Preferably, the upper and lower ends of the stamping ejection spring 218 are respectively in contact connection with the bottom of the stamping ejection plate 219 and the top of the stamping lower die support plate 217.

[0058] The first upper die assembly 22 comprises a first punching positioning groove 221, a punch 222, a first punching positioning hole 223, a punching limiting rod 224, a punching upper die plate 225, a second punching positioning groove 226 and a second punching positioning hole 227; the bottom rear end of the upper die support plate 7 is fixedly connected with the top of the punching upper die plate 225; the bottom of the punching upper die plate 225 is provided with four groups of first punching positioning grooves 221 and four groups of second punching positioning grooves 226 which are matched with the first punching positioning block 211 and the second punching positioning block 2110 respectively in position and shape; the bottom of the punching upper die plate 225 is provided with three groups of first punching positioning holes 223 and three groups of second punching positioning holes 227 which are matched with the first punching positioning pin 213 and the second punching positioning pin 2111 respectively in position and shape; the bottom of the punching upper die plate 225 is provided with four groups of punches 222 which are matched with the punch avoiding hole 214 in position and shape, and the top of each punch 222 is fixedly connected with the bottom of the punching upper die plate 225; the bottom of the punching upper die plate 225 is symmetrically provided with the punching limiting rods 224 on the left and right, and the top of each punching limiting rod 224 is fixedly connected with the bottom of the punching upper die plate 225, and the punching limiting rod 224 corresponds to the central axis of the punching limiting hole 215 in position.

[0059] When the device is working, the feeding assembly 4 is started, the suction cup end of the feeding assembly 4 moves the two groups of workpieces on the feeding table 5 above the stamping lower die plate 216 of the first lower die assembly 21, and then the two groups of workpieces are placed, so that the side walls of the two groups of workpieces are in contact with the inner end side walls of the first stamping positioning block 211 and the second stamping positioning block 2110 respectively, and the inner walls of the positioning holes of the two groups of workpieces are in contact with the side walls of the first stamping positioning pin 213 and the second stamping positioning pin 2111 respectively, so that the workpieces are positioned, then the upper die support plate 7 is driven by the external hydraulic assembly to be pressed downward, so that the shock absorbing rod 8 is inserted into the sleeve 9, the shock absorbing rod 8 is compressed, then the upper die support plate 7 drives the stamping upper die plate 225 of the first upper die assembly 22 to continue to be slowly pressed downward, so that the stamping limiting hole 215 and the stamping limiting rod 224 are inserted and limited, then the first stamping positioning block 211, the first stamping positioning pin 213, the second stamping positioning block 2110, the second stamping positioning pin 2111, the second stamping positioning hole 227 and the second stamping positioning groove 226 are inserted and matched with each other, the stamping upper die plate 225 presses the workpiece downward, so that the workpiece is sunk into the pressing groove 212 to perform burr pressing, and the stamping stripping plate 219 is lowered, so that the stamping stripping spring 218 is compressed; while the workpiece on the left side is being pressed, the through hole corresponding to the position of the punch 222 is punched, and the punch avoiding hole 214 avoids the punch 222; after the burr pressing and the punching are completed, the stamping upper die plate 225 is lifted, the assemblies are separated, the stamping stripping spring 218 rebounds, and drives the stamping stripping plate 219 to slide along the pressing groove 212 to eject the workpiece; then the feeding assembly 4 transports the workpiece processed in the first process to the machining surface of the bending assembly 3 for further processing; through the simultaneous action of the pressing groove 212 and the punch 222 on the die, the workpiece needing to be pressed and punched can be processed in two steps; through the double-station arrangement, two groups of workpieces can be processed at the same time, and the production efficiency is improved.

[0060] Example 2

[0061] Based on example 1, please refer to the description attached Figures 1-12 The bending assembly 3 comprises a second lower die assembly 31 and a second upper die assembly 32; the bottom front end of the upper die support plate 7 is connected to the top of the second upper die assembly 32, and the top front end of the support 1 is connected to the bottom of the second lower die assembly 31; the limiting end of the second lower die assembly 31 corresponds to the middle axis position of the limiting end of the second upper die assembly 32.

[0062] The second lower die assembly 31 comprises bending positioning blocks 311, bending stripper plates 312, bending positioning pins 313, punching limiting pins 314, step positioning pins 315, bending limiting holes 316, bending lower die plates 317, bending lower die support plates 318, bending stripper springs 319, stripper grooves 3110, step positioning blocks 3111 and pressing block grooves 3112; the top front end of the support 1 is fixedly connected with the bottom of the bending lower die support plate 318, and the top of the bending lower die support plate 318 is fixedly connected with the bottom of the bending lower die plate 317; four groups of bending positioning blocks 311 are installed on the top left side of the bending lower die plate 317, and four groups of step positioning blocks 3111 are installed on the top right side of the punching lower die plate 216; the bottoms of the bending positioning blocks 311 and the step positioning blocks 3111 are fixedly connected with the top of the bending lower die plate 317, and the inner end sidewalls of the bending positioning blocks 311 and the step positioning blocks 3111 are respectively in contact connection with the outer workpiece sidewalls; two groups of stripper grooves 3110 are formed in the left top of the bending lower die plate 317, and the inner walls of the stripper grooves 3110 are in sliding connection with the sidewalls of the bending stripper plates 312; the top left side of the bending lower die support plate 318 is fixedly connected with the bottoms of the two groups of bending positioning pins 313, and the positions of the bending positioning pins 313 correspond to the positioning holes of the external workpiece; the tops of the bending stripper plates 312 are provided with through holes in sliding connection with the sidewalls of the bending positioning pins 313; the bottoms of the bending stripper plates 312 are connected with the upper ends of one or more groups of bending stripper springs 319, and the lower ends of the bending stripper springs 319 are connected with the top of the bending lower die support plate 318; four groups of punching limiting pins 314 corresponding in shape and position to the protruding through holes of the external workpiece are installed on the top left side of the bending lower die plate 317, and the bottoms of the punching limiting pins 314 are fixedly connected with the top of the bending lower die plate 317; the pressing block grooves 3112 are formed in the top left side of the bending lower die plate 317; the step positioning pins 315 corresponding in position to the workpiece positioning holes are installed on the top right side of the bending lower die plate 317, and the bottoms of the step positioning pins 315 are fixedly connected with the top of the bending lower die plate 317; the bending limiting holes 316 are symmetrically formed in the top of the bending lower die plate 317.

[0063] Preferably, the upper and lower ends of the bending stripper springs 319 are respectively in contact connection with the bottom of the bending stripper plate 312 and the top of the bending lower die support plate 318.

[0064] The second upper die assembly 32 comprises a bending positioning groove 321, a pressing block 322, a bending positioning hole 323, a limiting pin avoiding hole 324, a bending limiting rod 325 and a bending upper die plate 326; the bottom front end of the upper die support plate 7 is fixedly connected with the top of the bending upper die plate 326, the bottom of the bending upper die plate 326 is provided with four groups of bending positioning grooves 321 which are matched with the bending positioning block 311 in position and shape; the bending upper die plate 326 is provided with the pressing block 322 which is matched with the pressing block groove 3112 in position and shape, and the top of the pressing block 322 is fixedly connected with the bottom of the bending upper die plate 326; the bottom of the pressing block 322 is provided with two groups of bending positioning holes 323 which are matched with the bending positioning pin 313 in position and shape; the bottom of the pressing block 322 is provided with four groups of limiting pin avoiding holes 324 which are matched with the punching limiting pin 314 in position and shape; the bottom left side of the bending upper die plate 326 is fixedly connected with the top of the bending limiting rod 325, and the bending limiting rod 325 corresponds to the middle axis position of the bending limiting hole 316 on the left side.

[0065] When the device works, the workpieces are placed above the bending lower die plate 317, the side walls of the two groups of workpieces are in contact with the inner end side walls of the bending positioning block 311 and the step positioning block 3111 respectively, the inner walls of the positioning holes of the two groups of workpieces are in contact with the side walls of the bending positioning pin 313 and the step positioning pin 315 respectively, and the inner wall of the through hole of the workpiece on the left side is in contact with the side wall of the punching limiting pin 314, so that the workpieces are positioned; at this time, the bottom of the workpiece on the left side is in contact with the top of the bending stripping plate 312; then the bending upper die plate 326 of the second upper die assembly 32 is pressed down, the bending positioning block 311, the bending positioning pin 313, the punching limiting pin 314, the bending limiting hole 316 and the bending limiting rod 325 are matched and inserted through the cooperation of the bending positioning groove 321, the bending positioning hole 323 and the limiting pin avoiding hole 324, the bending upper die plate 326 presses down the workpieces, the pressing block 322 is pressed into the pressing block groove 3112 to bend the workpieces, and the bending stripping plate 312 slides down along the stripping groove 3110 and makes the bending stripping spring 319 compressed; after the bending is completed, the bending upper die plate 326 rises, the bending stripping spring 319 rebounds to make the bending stripping plate 312 rise to eject the workpieces, and then the conveying assembly 4 transports the finished workpieces to the unloading slide 6 for unloading; through the cooperation of the conveying assembly 4, the workpieces can be continuously machined, the bending is carried out at the same time, the double stations are independent of each other, and different machining steps can be carried out.

[0066] Embodiment 3

[0067] On the basis of embodiment 2, see the description attached Figures 1-12The feeding assembly 4 comprises a mechanical arm 41, a support rod 42 and a suction disc 43; the right side of the support frame 1 is provided with the mechanical arm 41; the left side wall of the mechanical arm 41 is provided with three groups of support rods 42, and the right end side wall of each support rod 42 is fixedly connected with the left side wall of the mechanical arm 41; the bottom of each support rod 42 is fixedly connected with a plurality of suction discs 43.

[0068] When the device works, the mechanical arm 41 of the feeding assembly 4 slides backward, and the three groups of support rods 42 move backward to above the feeding table 5, the stamping lower die plate 216 and the bending lower die plate 317, then the mechanical arm 41 drives the support rods 42 to move downward, and the three groups of suction discs 43 respectively suck the workpieces on the feeding table 5, the stamping lower die plate 216 and the bending lower die plate 317; then the mechanical arm 41 drives the support rods 42 to lift and move forward until moving to above the stamping lower die plate 216, the bending lower die plate 317 and the discharging slide 6, the mechanical arm 41 drives the support rods 42 to descend, and then the suction discs 43 are closed to put down the workpieces; then the mechanical arm 41 drives the support rods 42 to move upward and move backward, so that the middle group of support rods 42 is located between the burr pressing and protruding assembly 2 and the bending assembly 3, thereby avoiding position, the upper die support plate 7 is pressed downward to process; through the operation of the plurality of support rods 42 at the same time, the workpieces at different positions can be transferred to the next process at the same time, and the production efficiency is improved.

[0069] Embodiment 4

[0070] Based on the embodiment 3, please refer to the description attached Figures 1-12 A use method of a metal piece stamping machining equipment based on double-station machining, comprising the following steps:

[0071] Step one, start the feeding assembly 4, the suction cup end of the feeding assembly 4 moves the two groups of workpieces on the feeding table 5 above the stamping lower die plate 216 of the first lower die assembly 21, then lowers, makes the side walls of the two groups of workpieces respectively contact with the inner end side walls of the first stamping positioning block 211 and the second stamping positioning block 2110, the inner walls of the positioning holes of the two groups of workpieces respectively contact with the side walls of the first stamping positioning pin 213 and the second stamping positioning pin 2111, so that the workpieces are positioned, then the external hydraulic assembly drives the upper die support plate 7 to press down, the shock absorbing rod 8 is inserted with the sleeve 9, the shock absorbing rod 8 is compressed, then the upper die support plate 7 drives the stamping upper die plate 225 of the first upper die assembly 22 to continue to slowly press down, the stamping limiting hole 215 and the stamping limiting rod 224 are inserted and limited, then the first stamping positioning block 211 and the first stamping positioning groove 221, the first stamping positioning pin 213 and the first stamping positioning hole 223, the second stamping positioning block 2110 and the second stamping positioning groove 226, the second stamping positioning pin 2111 and the second stamping positioning hole 227 are inserted and matched with each other, the stamping upper die plate 225 presses down the workpieces, the workpieces are pressed into the pressing groove 212 to press the burr, at the same time, the stamping stripping plate 219 is lowered, the stamping stripping spring 218 is compressed; the workpiece on the left side is punched at the same time of pressing the burr, the through hole corresponding to the position of the punch 222 is punched, the punch avoiding hole 214 avoids the punch 222; after the burr pressing and the punching are completed, the stamping upper die plate 225 is lifted up, the assemblies are separated, the stamping stripping spring 218 rebounds, drives the stamping stripping plate 219 to slide along the pressing groove 212, and the workpiece is ejected; then the feeding assembly 4 transports the workpiece processed in the first process to the machining surface of the bending assembly 3 for further processing;

[0072] Step two, when the workpiece is placed above the bending lower die plate 317, the side walls of the two groups of workpieces respectively contact with the inner end side walls of the bending positioning block 311 and the empty step positioning block 3111, the inner walls of the positioning holes of the two groups of workpieces respectively contact with the side walls of the bending positioning pin 313 and the empty step positioning pin 315, and the inner wall of the punching hole of the workpiece on the left side contacts with the side wall of the punching limiting pin 314, so that the workpiece is positioned; at this time, the bottom of the workpiece on the left side contacts with the top of the bending stripping plate 312; then the bending upper die plate 326 of the second upper die assembly 32 is pressed down, the bending positioning block 311 and the bending positioning groove 321, the bending positioning pin 313 and the bending positioning hole 323, the punching limiting pin 314 and the limiting pin avoiding hole 324, the bending limiting hole 316 and the bending limiting rod 325 are matched and inserted, the bending upper die plate 326 presses down the workpiece, the pressing block 322 is pressed into the pressing block groove 3112 to bend the workpiece, the bending stripping plate 312 slides down along the stripping groove 3110 and makes the bending stripping spring 319 compressed; after the bending is completed, the bending upper die plate 326 is lifted up, the bending stripping spring 319 rebounds to make the bending stripping plate 312 lift up and eject the workpiece, then the feeding assembly 4 transports the processed workpiece to the unloading slide 6 for unloading.

[0073] The above examples are only used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those ordinarily skilled in the art should understand: the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A metal piece stamping processing equipment based on double-station processing, comprising a support (1), characterized in that: the top of the support (1) is connected with the bottom of the lower die end of a burr removing and hole drawing assembly (2) for edge burr removing and hole drawing of a workpiece and a bending assembly (3) for bending of the workpiece; an upper die support plate (7) for supporting an upper die is installed above the support (1), the bottom of the upper die support plate (7) is connected with the top of the upper die end of the burr removing and hole drawing assembly (2) and the bending assembly (3), and the top of the upper die support plate (7) is connected with an external hydraulic assembly; the bottom of the upper die support plate (7) is fixedly connected with the top of a plurality of shock-absorbing rods (8) for buffering the upper die support plate (7), and the shock-absorbing rods (8) are symmetrically installed on the left and right sides of the upper die end of the burr removing and hole drawing assembly (2) and the bending assembly (3); the top of the support (1) is fixedly connected with the bottom of a plurality of sleeves (9) for inserting the shock-absorbing rods (8), and the sleeves (9) correspond to the positions of the axes of the shock-absorbing rods (8) one by one; a material conveying assembly (4) for conveying the workpiece is installed on the right side of the support (1); a discharging chute (6) for discharging and a feeding table (5) for placing workpieces to be processed are installed at the front and rear ends of the support (1), respectively; the burr removing and hole drawing assembly (2) comprises a first lower die assembly (21) and a first upper die assembly (22); the bottom rear end of the upper die support plate (7) is connected with the top of the first upper die assembly (22), and the top rear end of the support (1) is connected with the bottom of the first lower die assembly (21); the limiting end of the first lower die assembly (21) corresponds to the central axis of the limiting end of the first upper die assembly (22); the first lower die assembly (21) comprises a pressing groove (212), a punch avoiding hole (214), a stamping lower die plate (216), a stamping ejection spring (218), and a stamping ejection plate (219); the stamping lower die plate (216) is provided with the pressing groove (212); the inner walls of the pressing groove (212) are slidably connected with the side walls of the stamping ejection plate (219); the top of the stamping ejection plate (219) on the left side is provided with four punch avoiding holes (214) corresponding to the positions of the holes of the workpiece to be drawn, and the bottom of the stamping ejection plate (219) is connected with the upper ends of one or more stamping ejection springs (218); the first upper die assembly (22) comprises a punch (222) and a stamping upper die plate (225); the stamping upper die plate (225) is provided with four punches (222) corresponding in position and shape to the punch avoiding holes (214), and the stamping upper die plate (225) is used for pressing down the workpiece to make the workpiece fall into the pressing groove (212) for burr removing. ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The metal piece stamping apparatus based on double position machining according to claim 1, characterized by, The first lower die assembly (21) further comprises first stamping positioning blocks (211), first stamping positioning pins (213), stamping limiting holes (215), a stamping lower die support plate (217), second stamping positioning blocks (2110) and second stamping positioning pins (2111); the top rear end of the support (1) is fixedly connected with the bottom of the stamping lower die support plate (217), and the top of the stamping lower die support plate (217) is fixedly connected with the bottom of the stamping lower die plate (216); four groups of first stamping positioning blocks (211) are installed on the top left side of the stamping lower die plate (216), and four groups of second stamping positioning blocks (2110) are installed on the top right side of the stamping lower die plate (216), the bottoms of the first stamping positioning blocks (211) and the second stamping positioning blocks (2110) are fixedly connected with the top of the stamping lower die plate (216), and the inner end sidewalls of the first stamping positioning blocks (211) and the second stamping positioning blocks (2110) are respectively in contact connection with the sidewalls of the workpieces; the top left and right sides of the first stamping positioning blocks (211) are provided with pressing grooves (212); three groups of first stamping positioning pins (213) and three groups of second stamping positioning pins (2111) are installed on the top left and right sides of the stamping lower die support plate (217), and the bottoms of the first stamping positioning pins (213) and the second stamping positioning pins (2111) are fixedly connected with the top of the stamping lower die support plate (217); the positions of the first stamping positioning pins (213) and the second stamping positioning pins (2111) correspond to the positioning holes of the workpieces; the left and right groups of stamping stripping plates (219) are respectively provided with through holes in sliding connection with the sidewalls of the first stamping positioning pins (213) and the second stamping positioning pins (2111); the lower ends of the stamping stripping springs (218) are connected with the top of the stamping lower die support plate (217); and the top of the stamping lower die plate (216) is provided with stamping limiting holes (215) in left and right symmetry.

3. The metal piece stamping apparatus based on double position machining according to claim 2, characterized by, The upper and lower ends of the stamping stripping springs (218) are respectively in contact connection with the bottom of the stamping stripping plates (219) and the top of the stamping lower die support plate (217).

4. The metal piece stamping apparatus based on double position machining according to claim 3, characterized by, The first upper die assembly (22) further comprises a first punching positioning slot (221), a first punching positioning hole (223), a punching limiting rod (224), a second punching positioning slot (226) and a second punching positioning hole (227); the bottom rear end of the upper die support plate (7) is fixedly connected with the top of the punching upper die plate (225); the bottom of the punching upper die plate (225) is provided with four groups of first punching positioning slots (221) and four groups of second punching positioning slots (226) which are matched with the first punching positioning block (211) and the second punching positioning block (2110) respectively in position and shape; the bottom of the punching upper die plate (225) is provided with three groups of first punching positioning holes (223) and three groups of second punching positioning holes (227) which are matched with the first punching positioning pin (213) and the second punching positioning pin (2111) respectively in position and shape; the top of the punch (222) is fixedly connected with the bottom of the punching upper die plate (225); the punching limiting rod (224) is symmetrically installed on the bottom of the punching upper die plate (225), the top of the punching limiting rod (224) is fixedly connected with the bottom of the punching upper die plate (225), and the punching limiting rod (224) corresponds to the central axis position of the punching limiting hole (215).

5. The metal piece stamping apparatus based on double position processing according to claim 4, characterized in that, The bending assembly (3) comprises a second lower die assembly (31) and a second upper die assembly (32); the bottom front end of the upper die support plate (7) is connected with the top of the second upper die assembly (32), and the top front end of the support (1) is connected with the bottom of the second lower die assembly (31); the limiting end of the second lower die assembly (31) corresponds to the central axis position of the limiting end of the second upper die assembly (32).

6. The metal piece stamping apparatus based on double position processing according to claim 5, characterized by, The second lower die assembly (31) comprises a bending positioning block (311), a bending stripping plate (312), a bending positioning pin (313), a punching limiting pin (314), a step positioning pin (315), a bending limiting hole (316), a bending lower die plate (317), a bending lower die support plate (318), a bending stripping spring (319), a stripping groove (3110), a step positioning block (3111), and a pressing block groove (3112); the top front end of the support (1) is fixedly connected with the bottom of the bending lower die support plate (318), and the top of the bending lower die support plate (318) is fixedly connected with the bottom of the bending lower die plate (317); four groups of bending positioning blocks (311) are installed on the top left side of the bending lower die plate (317), and four groups of step positioning blocks (3111) are installed on the top right side of the punching lower die plate (216); the bottoms of the bending positioning blocks (311) and the step positioning blocks (3111) are fixedly connected with the top of the bending lower die plate (317), and the inner end sidewalls of the bending positioning blocks (311) and the step positioning blocks (3111) are respectively in contact connection with the sidewalls of the external workpiece; two groups of stripping grooves (3110) are formed on the left top of the bending lower die plate (317), and the inner walls of the stripping grooves (3110) are in sliding connection with the sidewalls of the bending stripping plate (312); the left top of the bending lower die support plate (318) is fixedly connected with the bottoms of the two groups of bending positioning pins (313), and the positions of the bending positioning pins (313) correspond to the positioning holes of the external workpiece; the tops of the bending stripping plates (312) are all provided with through holes in sliding connection with the sidewalls of the bending positioning pins (313); the bottoms of the bending stripping plates (312) are all connected with the upper ends of one or more groups of bending stripping springs (319), and the lower ends of the bending stripping springs (319) are all connected with the top of the bending lower die support plate (318); four groups of punching limiting pins (314) are installed on the left top of the bending lower die plate (317) and matched with the shapes and positions of the protruding through holes of the external workpiece, and the bottoms of the punching limiting pins (314) are all fixedly connected with the top of the bending lower die plate (317); the pressing block groove (3112) is formed on the left top of the bending lower die plate (317); the step positioning pin (315) corresponding to the position of the workpiece positioning hole is installed on the right top of the bending lower die plate (317), and the bottom of the step positioning pin (315) is fixedly connected with the top of the bending lower die plate (317); the bending limiting holes (316) are symmetrically formed on the top of the bending lower die plate (317).

7. The metal piece stamping apparatus based on double position processing according to claim 6, characterized by, The upper and lower ends of the bending stripping spring (319) are respectively in contact connection with the bottom of the bending stripping plate (312) and the top of the bending lower die support plate (318).

8. The metal piece stamping apparatus based on double position machining according to claim 7, characterized by, The second upper die assembly (32) comprises a bending positioning groove (321), a pressing block (322), a bending positioning hole (323), a limiting pin avoiding hole (324), a bending limiting rod (325) and a bending upper die plate (326); the bottom front end of the upper die support plate (7) is fixedly connected with the top of the bending upper die plate (326), the bottom of the bending upper die plate (326) is provided with four groups of bending positioning grooves (321) matched with the bending positioning block (311) in position and shape; the bottom of the bending upper die plate (326) is provided with the pressing block (322) matched with the pressing block groove (3112) in position and shape, the top of the pressing block (322) is fixedly connected with the bottom of the bending upper die plate (326); the bottom of the pressing block (322) is provided with two groups of bending positioning holes (323) matched with the bending positioning pin (313) in position and shape; the bottom of the pressing block (322) is provided with four groups of limiting pin avoiding holes (324) matched with the punching limiting pin (314) in position and shape; the bottom left side of the bending upper die plate (326) is fixedly connected with the top of the bending limiting rod (325), and the bending limiting rod (325) corresponds to the central axis position of the bending limiting hole (316) on the left side.

9. The metal piece stamping apparatus based on double position machining according to claim 8, characterized in that, The material conveying assembly (4) comprises a mechanical arm (41), a support rod (42) and a suction cup (43); the right side of the support (1) is provided with the mechanical arm (41); the left side wall of the mechanical arm (41) is provided with three groups of support rods (42), and the right end side walls of the support rods (42) are fixedly connected with the left side wall of the mechanical arm (41); the bottom of the support rod (42) is fixedly connected with a plurality of groups of suction cups (43).

10. A method of using a metal piece stamping apparatus based on double station processing as claimed in claim 9, characterized in that, The method comprises the following steps: Step one, start the feeding assembly (4), the suction cup end of the feeding assembly (4) moves two groups of workpieces on the feeding table (5) above the stamping lower die plate (216) of the first lower die assembly (21), and then puts down, so that the side walls of the two groups of workpieces are in contact with the inner end side walls of the first stamping positioning block (211) and the second stamping positioning block (2110) respectively, and the inner walls of the positioning holes of the two groups of workpieces are in contact with the side walls of the first stamping positioning pin (213) and the second stamping positioning pin (2111) respectively, so that the workpieces are positioned, then the external hydraulic assembly drives the upper die support plate (7) to press down, so that the shock absorbing rod (8) is inserted with the sleeve (9), the shock absorbing rod (8) is compressed, then the upper die support plate (7) drives the stamping upper die plate (225) of the first upper die assembly (22) to continue to slowly press down, so that the stamping limiting hole (215) and the stamping limiting rod (224) are inserted and limited, then the first stamping positioning block (211) and the first stamping positioning groove (221), the first stamping positioning pin (213) and the first stamping positioning hole (223), the second stamping positioning block (2110) and the second stamping positioning groove (226), the second stamping positioning pin (2111) and the second stamping positioning hole (227) are inserted and matched with each other, the stamping upper die plate (225) presses down the workpieces, so that the workpieces are trapped in the pressing groove (212) to press the burr, at the same time, the stamping stripping plate (219) is lowered, so that the stamping stripping spring (218) is compressed; the workpiece on the left side is punched at the same time of pressing the burr, the through hole corresponding to the position of the punch (222) is punched, the punch avoidance hole (214) avoids the punch (222); after the burr pressing and the punching are completed, the stamping upper die plate (225) is lifted, the assemblies are separated, the stamping stripping spring (218) rebounds, drives the stamping stripping plate (219) to slide up along the pressing groove (212), and the workpiece is ejected; then the feeding assembly (4) transports the workpieces processed in the first process to the machining surface of the bending assembly (3) for further processing; Step two, when the workpiece is placed above the bending lower die plate (317), the side walls of the two groups of workpieces respectively contact the inner end side walls of the bending positioning block (311) and the empty step positioning block (3111), the inner walls of the positioning holes of the two groups of workpieces respectively contact the side walls of the bending positioning pin (313) and the empty step positioning pin (315), and the inner wall of the protruding through hole of the workpiece on the left side contacts the side wall of the punching limiting pin (314), so that the workpiece is positioned; at this time, the bottom of the workpiece on the left side contacts the top of the bending stripping plate (312); then the bending upper die plate (326) of the second upper die assembly (32) is pressed down, the bending positioning block (311) is inserted into the bending positioning groove (321), the bending positioning pin (313) is inserted into the bending positioning hole (323), the punching limiting pin (314) is inserted into the limiting pin avoiding hole (324), the bending limiting hole (316) and the bending limiting rod (325) are matched and inserted, the bending upper die plate (326) presses the workpiece down, the pressing block (322) is pressed into the pressing block groove (3112) to bend the workpiece, the bending stripping plate (312) slides down along the stripping groove (3110) and makes the bending stripping spring (319) compressed; after the bending is completed, the bending upper die plate (326) rises, the bending stripping spring (319) rebounds to make the bending stripping plate (312) rise, the workpiece is ejected, and then the material conveying assembly (4) transports the finished workpiece to the unloading slide (6) for unloading.

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