Automobile metal plate hemming device capable of avoiding workpiece displacement

Abstract

The automobile metal plate hemming device capable of avoiding the workpiece displacement comprises a workbench, the top face of the workbench is fixedly connected with a lower mounting plate, a plurality of lower die structures are evenly arranged on the top face of the lower mounting plate, and a plurality of workpiece abutting mechanisms are arranged at the positions, corresponding to the lower die structures, of one side of the top face of the workbench. The anti-moving mechanism is arranged to replace a manual hand holding mode to limit a sheet metal part, when the upper die structure presses downwards to conduct edge curling forming on the sheet metal part, a vertical plate can apply extrusion force to the sheet metal part under the action of a spring, and when the sheet metal part deforms, a side plate can move along with the sheet metal part, so that the sheet metal part is prevented from moving. The angle of the first vacuum adsorption table can be changed along with the deformation angle of the sheet metal part, so that the first vacuum adsorption table fixes the end part of the sheet metal part all the time, the effect of assisting the end part of the sheet metal part by a human hand is simulated, the sheet metal part does not displace during hemming forming, the phenomenon of hemming position deviation is avoided, manual operation is not needed, the dependence on personnel technology is avoided, and the production efficiency is improved. And the safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sheet metal equipment, in particular to an automobile sheet metal curling device for preventing workpiece displacement. Background Art

[0002] Sheet metal is a processing technology. There is no complete definition of sheet metal yet. According to a definition in a foreign professional journal, it can be defined as: Sheet metal is a comprehensive cold processing technology for metal sheets (usually below 6mm), including shearing, punching / cutting / compounding, folding, riveting, splicing, forming (such as car body), etc. In the production of automotive sheet metal parts, many sheet metal parts need to be bent and curled on the edges, which is a kind of bending process. By placing the sheet metal part on a curling die and pressing the upper die down, a curled shape is formed in the arc groove in the die; for example, the Chinese utility model patent with authorization announcement number CN214601174U discloses a sheet metal bending mechanism, which involves the field of bending machines. The invention comprises a bending machine body, a tool holder is arranged at the bottom end of the bending machine body, a bending knife is fixedly installed at the bottom end of the tool holder, a tool holder is fixedly installed at the top end of the bending machine body, pins are fixedly connected to both sides of the bending machine body, a sleeve block is sleeved on the outer side of the pin block, and a sleeve is fixedly connected to the outer side of the sleeve block; however, the current sheet metal curling process has the following defects:

[0003] When the sheet metal is curled again, the edge of the sheet metal bends after the upper mold is pressed down, so the sheet metal is deformed, causing the end position to change, which is very likely to cause displacement, resulting in inaccurate curling position. The current method is to hold the end of the sheet metal manually, and when the upper mold is pressed down, manually apply force to the sheet metal, and move the hand in the deformation direction of the sheet metal to prevent the sheet metal from shifting. This method has high requirements on the operating skills of the personnel and has great safety hazards, which is not conducive to continued use.

[0004] To this end, we propose an automobile sheet metal curling device that avoids workpiece displacement to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an automobile sheet metal curling device that avoids workpiece displacement, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automobile sheet metal hemming device for preventing workpiece displacement, comprising a workbench, the top surface of the workbench is fixedly connected to a lower mounting plate, a plurality of lower mold structures are evenly arranged on the top surface of the lower mounting plate, a plurality of abutment mechanisms are arranged on one side of the top surface of the workbench corresponding to the positions of the plurality of lower mold structures, an anti-shift mechanism is arranged on the other side of the top surface of the workbench, a through groove is provided on the top surface of the workbench at a position between the anti-shift mechanism and the lower mounting plate, and a workpiece fixing mechanism is arranged in the through groove;

[0007] The anti-shift mechanism comprises a horizontal plate and a vertical plate, wherein the vertical plate is horizontally slidably arranged on the top surface of the horizontal plate, and a power slide groove is provided in the middle of one side of the vertical plate close to the lower mold structure, and a power slider is vertically slidably connected in the power slide groove, and a side wall of the power slider is fixedly connected to the side plate, and a side wall of the side plate is fixedly connected to a hinge seat, and the hinge seat is rotatably connected to the end of the first vacuum adsorption table;

[0008] The top surface of the horizontal plate is provided with a top slot, the top slot is horizontally slidably connected to the first slide and the second slide is horizontally slidably connected in the top slot, the second slide is located between the first slide and the lower mold structure, two sliding columns are horizontally fixed between the two ends of the first slide and the two ends of the second slide, two sliding sleeves are horizontally slidably arranged on the two sliding columns, the top surfaces of the two sliding sleeves are fixedly connected to the mounting plate, the bottom end of the vertical plate is fixedly connected to the top surface of the mounting plate, the two sliding sleeves are horizontally fixedly connected to the abutment plate, a plurality of telescopic main rods are horizontally fixedly connected to one side of the first slide close to the abutment plate, a telescopic slave rod is horizontally slidably arranged at the end of the telescopic main rod, the end of the telescopic slave rod is fixedly connected to the side wall of the abutment plate, a spring is sleeved on the telescopic main rod and the telescopic slave rod, and the spring is fixedly connected between the first slide and the abutment plate.

[0009] Preferably, a sliding opening is horizontally provided on the sliding sleeve, and the two side walls of the sliding opening are in sliding contact with the two sides of the sliding column, the top surface of the sliding column is fixedly connected to the rack, and a top opening is provided on the top surface of the sliding opening, and the first locking gear plate is vertically slidably connected in the top opening, and two first pneumatic push rods are fixedly connected to the two sides of the top surface of the mounting plate, and the output end of the first pneumatic push rod passes through the mounting plate and the sliding sleeve and is fixedly connected to the top surface of the first locking gear plate, and the first locking gear plate is meshed with the rack.

[0010] Preferably, the middle part of the top groove is horizontally rotatably connected to the second screw rod, the middle part of the first slide plate is fixedly connected to the second threaded sleeve, the middle part of the second slide plate is fixedly connected to the third threaded sleeve, the second screw rod is threadedly sleeved with the second threaded sleeve and the third threaded sleeve, an opening is opened at the bottom of the middle part of the support plate, the second screw rod passes through the opening, the end of the cross plate is fixedly connected to the second servo reduction motor, and the shaft end of the second servo reduction motor is fixedly connected to the end of the second screw rod.

[0011] Preferably, the vertical plate is located above and below the power slide and is rotatably connected to two synchronous pulleys, and the two synchronous pulleys are sleeved with double-sided toothed synchronous belts. The top side wall of the vertical plate is fixedly connected to the third servo reduction motor, and the shaft end of the third servo reduction motor is fixedly connected to the shaft of the synchronous pulley located above. A through hole is vertically opened on the power slider, and the double-sided toothed synchronous belt passes through the through hole. The through hole is rotatably connected to a plurality of first small pulleys on one side close to the side plate, and the other side of the through hole is rotatably connected to a plurality of second small pulleys. The first small pulley and the second small pulley are meshed and connected to the double-sided toothed synchronous belt. A side hole is opened in the power slider near the positions of the plurality of first small pulleys, and the side hole is horizontally slidably connected to the second locking tooth plate, and the second locking tooth plate is meshed and connected to the plurality of first small pulleys. A second pneumatic push rod is fixedly connected to the power slider and the side plate, and the output end of the second pneumatic push rod is fixedly connected to the center of the side wall of the second locking tooth plate. The side wall of the hinge seat is fixedly connected to the fourth servo reduction motor, and the shaft end of the fourth servo reduction motor is fixedly connected to the shaft of the first vacuum adsorption platform.

[0012] Preferably, the vertical plate is provided with two guide slots at both sides of the power slot, the guide slots are vertically slidably connected to guide sliders, the guide sliders are fixedly connected to the side walls of the side plates, a column slot is horizontally provided in the telescopic main rod, a sliding hole is provided in the telescopic main rod near one end of the abutment plate, the telescopic slave rod is slidably sleeved in the sliding hole, the end of the telescopic slave rod is located in the column slot and fixedly connected to a limiting circular plate, and the limiting circular plate is horizontally slidably connected to the column slot.

[0013] Preferably, the resisting mechanism includes two guide grooves horizontally opened on the top surface of the workbench, two guide bars are horizontally slidably connected in the two guide grooves, the top surfaces of the two guide bars are fixedly connected to the slide, the top surface of the slide close to the top surface of one side of the lower mold structure is vertically fixed to the side pressure plate, the top surface of the workbench is fixedly connected to the first hydraulic push rod near the position of the workbench, and the output end of the first hydraulic push rod is fixedly connected to the side wall of the slide.

[0014] Preferably, the workpiece fixing mechanism includes a sliding block, which is horizontally slidingly connected to the sliding block in the through groove, and the sliding block is vertically fixedly sleeved with a second hydraulic push rod, and the top end of the output end of the second hydraulic push rod is fixedly connected to a top platform, and the top surface of the top platform is rotatably connected to a rotating column, and the top surface of the rotating column is fixedly connected to a second vacuum adsorption table, and the top surface of the top platform is fixedly connected to a fifth servo reduction motor, and the rotating shaft end of the fifth servo reduction motor is fixedly connected to a driving gear, and the rotating column is fixedly sleeved with a driven gear ring, and the driving gear is meshingly connected to the driven gear ring.

[0015] Preferably, a T-shaped groove is provided on the top surface of the workbench, and a T-shaped slider is horizontally slidably connected in the T-shaped groove, and the top surface of the T-shaped slider is fixedly connected to the sliding plate, and the top surface of the sliding plate is fixedly connected to the bottom surface of the cross plate of the anti-movement mechanism. A connecting groove is provided inside the workbench between the sliding plate and the through groove, and the connecting groove is communicated with the through groove. A connecting block is horizontally slidably connected in the connecting groove, and the sliding block is fixedly connected to one side of the connecting block. The top surface of the connecting block is fixedly connected to the bottom surface of the sliding plate, and the first screw rod is horizontally rotatably connected in the T-shaped groove, and a first threaded sleeve is fixedly connected to the T-shaped slider, and the first screw rod is threadedly connected to the first threaded sleeve, and the end of the workbench is fixedly connected to the first servo reduction motor, and the shaft end of the first servo reduction motor is fixedly connected to the end of the first screw rod.

[0016] Preferably, two side frames are vertically fixed to both sides of the workbench, two side grooves are provided on one side of the two side frames close to each other, two side blocks are vertically slidably connected in the two side grooves, a force-receiving rod is horizontally fixed between the two side blocks, the bottom surface of the force-receiving rod is fixed to an upper mounting plate, the upper mounting plate is located directly above the lower mounting plate, and multiple upper mold structures are arranged on the upper mounting plate directly above multiple lower mold structures, the bottom surface of the workbench is fixed to a frame, the top surfaces of the two side frames are fixed to a push rod, the middle part of the push rod is fixed to a hydraulic cylinder, and the output end of the hydraulic cylinder is fixed to the top surface of the force rod.

[0017] Preferably, the top surface of the lower mounting plate is horizontally provided with a T-slot, the lower mold structure comprises a lower mold plate, the bottom surface of the lower mold plate is fixedly connected to the T-strip, the top surface of the lower mold plate is provided with a mold opening, the T-strip is horizontally slidably connected in the T-slot, a plurality of threaded tubes are evenly fixed to one side of the lower mounting plate, the threaded tubes are threadedly connected to locking bolts, the ends of the locking bolts contact the side walls of the T-strip, and a plurality of T-openings are provided at the bottom of the side walls of the upper mounting plate, the upper mold structure comprises an upper mold plate, the top surface of the upper mold plate is fixedly connected to the mounting strip plate, the bottom surface of the upper mold plate is fixedly connected to the pressing die, the mounting strip plate is inserted in the T-opening, two mounting blocks are fixedly connected to the two sides of the top surface of the mounting strip plate, the mounting blocks are inserted in the side positions of the T-opening, two mounting columns are horizontally fixedly connected to the two sides of the T-opening, the ends of the mounting columns are fixedly connected to threaded columns, a mounting opening is horizontally provided on the mounting block, the mounting column passes through the mounting opening and is fixedly connected to the threaded column, and the threaded column is threadedly connected to a hexagonal nut.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides an anti-movement mechanism to limit the sheet metal part instead of the manual hand-supporting method. When the upper mold structure presses down to curl the sheet metal part, the vertical plate will apply an extrusion force to the sheet metal part under the action of the spring. When the sheet metal part is deformed, the side plate will move accordingly, and the first vacuum adsorption table will also change its angle according to the deformation angle of the sheet metal part, so that the first vacuum adsorption table always fixes the end of the sheet metal part, simulating the effect of human hands assisting the end of the sheet metal part, so that the sheet metal part will not be displaced during curling, and the phenomenon of curling position deviation is avoided. It does not require manual operation, does not rely on personnel technology, and is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure in the first and second embodiments of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the workbench in the first and second embodiments of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the anti-movement mechanism in the first and second embodiments of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the horizontal plate in the first and second embodiments of the present invention;

[0024] Figure 5 It is a schematic diagram of the cross-section structure of the vertical plate in the first and second embodiments of the present invention;

[0025] Figure 6 It is a schematic diagram of the cross-section structure of the sliding sleeve in the second embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the cross-section structure at the abutment plate in the second embodiment of the present invention;

[0027] Figure 8 It is a schematic diagram of the cross-section structure of the power slider in the second embodiment of the present invention;

[0028] Fig. 9 It is a schematic diagram of the cross-section structure of the workbench in the second embodiment of the present invention;

[0029] Fig.10 For the present invention Fig. 9 A schematic diagram of the enlarged structure of the structure at center A;

[0030] Fig.11 It is a schematic diagram of the cross-section structure of the lower mold structure in the second embodiment of the present invention;

[0031] Fig.12 It is a schematic diagram of the cross-section structure of the upper mold structure in the second embodiment of the present invention.

[0032] In the figure: 1, workbench; 2, anti-shift mechanism; 3, abutment mechanism; 4, workpiece fixing mechanism; 5, lower die structure; 6, upper die structure; 11, lower mounting plate; 12, side frame; 13, side groove; 14, side block; 15, force rod; 16, upper mounting plate; 17, ejector rod; 18, hydraulic cylinder; 110, T-type slide groove; 111, T-type slide block; 112, through groove; 113, connecting groove; 114, connecting block; 115, sliding plate; 116, first screw rod; 117, first threaded sleeve; 118, first servo reduction motor; 119, frame; 120, T-slot; 121, threaded tube; 122, locking bolt; 123, T-slot; 124, mounting column; 125, threaded column; 126, hexagonal nut; 21, horizontal plate; 22, vertical plate; 23, power slide; 24, power slider; 25, side plate; 26, hinge seat; 27, first vacuum adsorption table; 28, top slot; 29, first slide plate; 210, second slide plate; 211, slide column; 212, rack; 213, sleeve; 214, slide; 215, carrying plate; 216, stop plate; 217, telescopic main rod; 218, telescopic slave rod; 21 9. Spring; 220. First pneumatic push rod; 221. Top opening; 222. First locking tooth plate; 223. Second screw rod; 224. Second threaded sleeve; 225. Third threaded sleeve; 226. Opening; 227. Second servo reduction motor; 228. Synchronous belt pulley; 229. Double-sided toothed synchronous belt; 230. Third servo reduction motor; 231. Through opening; 232. First small pulley; 234. Second small pulley; 235. Side opening; 236. Second locking tooth plate; 237. Second pneumatic push rod; 238. Fourth servo reduction motor; 239. Guide Slide groove; 240, guide slider; 241, column groove; 242, slide hole; 243, limit circular plate; 31, guide groove; 32, guide strip; 33, slide table; 34, side pressure plate; 35, first hydraulic push rod; 41, sliding block; 42, second hydraulic push rod; 43, top table; 44, rotating column; 45, second vacuum adsorption table; 46, fifth servo reduction motor; 47, driving gear; 48, driven gear ring; 51, lower template; 52, T-bar; 53, die mouth; 61, upper template; 62, die; 63, mounting strip plate; 64, mounting block; 65, mounting mouth. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] See also Figure 1-5 The present invention provides a technical solution: an automobile sheet metal hemming device for preventing workpiece displacement, comprising a workbench 1, the top surface of the workbench 1 is fixedly connected to a lower mounting plate 11, a plurality of lower mold structures 5 are evenly arranged on the top surface of the lower mounting plate 11, a plurality of abutment mechanisms 3 are arranged on one side of the top surface of the workbench 1 corresponding to the positions of the plurality of lower mold structures 5, an anti-movement mechanism 2 is arranged on the other side of the top surface of the workbench 1, a through groove 112 is provided on the top surface of the workbench 1 between the anti-movement mechanism 2 and the lower mounting plate 11, and a workpiece fixing mechanism 4 is arranged in the through groove 112;

[0036] The anti-shift mechanism 2 includes a horizontal plate 21 and a vertical plate 22. The vertical plate 22 is horizontally slidably arranged on the top surface of the horizontal plate 21. A power slide groove 23 is provided in the middle of one side of the vertical plate 22 close to the lower mold structure 5. A power slider 24 is vertically slidably connected in the power slide groove 23. The side wall of the power slider 24 is fixedly connected to the side plate 25. The side wall of the side plate 25 is fixedly connected to the hinge seat 26. The hinge seat 26 is rotatably connected to the end of the first vacuum adsorption platform 27.

[0037] A top notch 28 is provided on the top surface of the horizontal plate 21, and a first slide plate 29 and a second slide plate 210 are horizontally slidably connected in the top notch 28, and the second slide plate 210 is horizontally slidably connected in the top notch 28, and the second slide plate 210 is located between the first slide plate 29 and the lower mold structure 5, and two sliding columns 211 are horizontally fixedly connected between the two ends of the first slide plate 29 and the two ends of the second slide plate 210, and two sliding sleeves 213 are horizontally slidably arranged on the two sliding columns 211, and the top surfaces of the two sliding sleeves 213 are fixedly connected to the mounting plate 215, and the bottom end of the vertical plate 22 is fixedly connected to the top surface of the mounting plate 215, and the two sliding sleeves 213 are horizontally fixedly connected to the abutment plate 216, and a plurality of telescopic main rods 217 are horizontally fixedly connected to the side of the first slide plate 29 close to the abutment plate 216, and a telescopic slave rod 218 is horizontally slidably arranged at the end of the telescopic main rod 217, The end of the telescopic slave rod 218 is fixedly connected to the side wall of the abutment plate 216, and the spring 219 is sleeved on the telescopic main rod 217 and the telescopic slave rod 218. The spring 219 is fixedly connected between the first slide plate 29 and the abutment plate 216. When the upper mold structure 6 is pressed down for curling, the vertical plate 22 will apply an extrusion force to the sheet metal under the action of the spring 219. When the sheet metal is deformed, the side plate 25 will move with it, and the first vacuum adsorption platform 27 will also change its angle with the deformation angle of the sheet metal, so that the first vacuum adsorption platform 27 always fixes the end of the sheet metal, simulating the effect of human hands assisting the end of the sheet metal, so that the sheet metal will not be displaced during curling, avoiding the phenomenon of curling position offset. It does not require manual operation, does not rely on personnel technology, and is safer.

[0038] Embodiment 2:

[0039] See also Figure 1-12, which is the second embodiment of the present invention. This embodiment is based on the previous embodiment. A sliding opening 214 is horizontally provided on the sliding sleeve 213. The two side walls of the sliding opening 214 slide in contact with the two sides of the sliding column 211. The top surface of the sliding column 211 is fixedly connected to the rack 212. A top opening 221 is provided on the top surface of the sliding opening 214. The first locking tooth plate 222 is vertically slidably connected in the top opening 221. Two first pneumatic push rods 220 are fixedly connected to the two sides of the top surface of the mounting plate 215. The output end of the first pneumatic push rod 220 passes through the mounting plate 215 and the sliding sleeve 213 and is fixedly connected to the top surface of the first locking tooth plate 222. The first locking tooth plate 222 is meshed with the rack 212. When the first locking tooth plate 222 is meshed with the rack 212, the position of the vertical plate 22 can be changed by the second screw rod 223, so that the sheet metal part can be moved. When the first locking tooth plate 222 leaves the rack 212, the sliding sleeve 213 can slide horizontally freely, and a thrust can be applied to the sheet metal part, which is convenient for curling.

[0040] The middle part of the top slot 28 is horizontally rotatably connected to the second screw rod 223, the middle part of the first slide plate 29 is fixedly connected to the second threaded sleeve 224, the middle part of the second slide plate 210 is fixedly connected to the third threaded sleeve 225, the second screw rod 223 is threadedly sleeved on the second threaded sleeve 224 and the third threaded sleeve 225, an opening 226 is provided at the bottom middle part of the butt plate 216, the second screw rod 223 passes through the opening 226, the end of the cross plate 21 is fixedly connected to the second servo reduction motor 227, and the end of the rotating shaft of the second servo reduction motor 227 is fixedly connected to the end of the second screw rod 223.

[0041] The vertical plate 22 is located above and below the power slide 23 and is rotatably connected to two synchronous pulleys 228. The two synchronous pulleys 228 are sleeved with a double-sided toothed synchronous belt 229. The top side wall of the vertical plate 22 is fixedly connected to the third servo reduction motor 230. The shaft end of the third servo reduction motor 230 is fixedly connected to the shaft of the synchronous pulley 228 located above. A through hole 231 is vertically opened on the power slider 24. The double-sided toothed synchronous belt 229 passes through the through hole 231. The through hole 231 is rotatably connected to a plurality of first small pulleys 232 on one side close to the side plate 25, and a plurality of second small pulleys 234 are rotatably connected to the first small pulleys 232 and the second small pulleys 234 are meshed and connected to the double-sided toothed synchronous belt 229. A side opening 235 is opened in the power slider 24 near the plurality of first small pulleys 232. The side opening 235 is horizontally slidably connected to a second locking tooth plate 236. The second locking tooth plate 236 is meshed and connected A plurality of first small pulleys 232 are connected, a second pneumatic push rod 237 is fixedly connected inside the power slider 24 and the side plate 25, an output end of the second pneumatic push rod 237 is fixedly connected to the center of the side wall of the second locking gear plate 236, a fourth servo reduction motor 238 is fixedly connected to the side wall of the hinge seat 26, a rotating shaft end of the fourth servo reduction motor 238 is fixedly connected to the rotating shaft of the first vacuum adsorption platform 27, when the second locking gear plate 236 is meshed with the first small pulley 232, the double-sided toothed synchronous belt 229 can drive the sheet metal to move up and down, when the second locking gear plate 236 leaves the first small pulley 232, the sheet metal can move up and down at will, so as to facilitate the displacement of the end of the sheet metal during curling, similarly the fourth servo reduction motor 238 is used to change the angle of the first vacuum adsorption platform 27, and when the fourth servo reduction motor 238 is powered off, the first vacuum adsorption platform 27 can change the angle with the end of the sheet metal, so as to facilitate the curling work.

[0042] Two guide slots 239 are provided on both sides of the power slot 23 of the vertical plate 22. The guide slots 239 are vertically slidably connected to the guide slider 240. The guide slider 240 is fixedly connected to the side wall of the side plate 25. A column slot 241 is horizontally provided in the telescopic main rod 217. A sliding hole 242 is provided at one end of the telescopic main rod 217 close to the abutment plate 216. The telescopic slave rod 218 is slidably sleeved in the sliding hole 242. The end of the telescopic slave rod 218 is located in the column slot 241 and is fixedly connected to the limiting circular plate 243. The limiting circular plate 243 is horizontally slidably connected to the column slot 241.

[0043] The resisting mechanism 3 includes two guide grooves 31 horizontally opened on the top surface of the workbench 1, two guide bars 32 are horizontally slidably connected in the two guide grooves 31, the top surfaces of the two guide bars 32 are fixedly connected to a slide 33, the top surface of the slide 33 is close to the top surface of the lower mold structure 5 and is vertically fixed to a side pressure plate 34, the top surface of the workbench 1 is fixedly connected to a first hydraulic push rod 35 near the position of the workbench 1, and the output end of the first hydraulic push rod 35 is fixedly connected to the side wall of the slide 33.

[0044] The workpiece fixing mechanism 4 includes a sliding block 41, which is horizontally slidably connected to the sliding block 41 in the through groove 112, and a second hydraulic push rod 42 is vertically fixedly sleeved on the sliding block 41. The top end of the output end of the second hydraulic push rod 42 is fixedly connected to a top platform 43, and the top surface of the top platform 43 is rotatably connected to a rotating column 44. The top surface of the rotating column 44 is fixedly connected to a second vacuum adsorption platform 45, and the top surface of the top platform 43 is fixedly connected to a fifth servo reduction motor 46. The shaft end of the fifth servo reduction motor 46 is fixedly connected to a driving gear 47, and a driven gear ring 48 is fixedly sleeved on the rotating column 44. The driving gear 47 is meshedly connected to the driven gear ring 48. The workpiece fixing mechanism 4 is convenient for fixing the sheet metal, moving the sheet metal to different positions of the upper mold structure 6, and rotating the sheet metal so that the edge of the sheet metal to be processed is located at the upper mold structure 6.

[0045] The top surface of the workbench 1 is provided with a T-shaped slide groove 110, and the T-shaped slide block 111 is connected to the T-shaped slide groove 110 in a horizontal sliding manner. The top surface of the T-shaped slide block 111 is fixedly connected to the sliding plate 115, and the top surface of the sliding plate 115 is fixedly connected to the bottom surface of the horizontal plate 21 of the anti-shifting mechanism 2. A connecting groove 113 is provided between the sliding plate 115 and the through groove 112 inside the workbench 1, and the connecting groove 113 is connected to the through groove 112. The connecting block 114 is connected to the connecting groove 113 in a horizontal sliding manner, and the sliding block 41 is fixedly connected to one side of the connecting block 114. The top surface of the connecting block 114 is fixedly connected to the bottom surface of the sliding plate 115, the first screw rod 116 is horizontally rotated in the T-shaped slide groove 110, the first threaded sleeve 117 is fixedly connected to the T-shaped slider 111, the first screw rod 116 is threadedly connected to the first threaded sleeve 117, the end of the workbench 1 is fixedly connected to the first servo reduction motor 118, the shaft end of the first servo reduction motor 118 is fixedly connected to the end of the first screw rod 116, and the first servo reduction motor 118 is used to drive the anti-movement mechanism 2 and the workpiece fixing mechanism 4 to move.

[0046] Two side frames 12 are vertically fixed to both sides of the workbench 1, and two side grooves 13 are provided on one side of the two side frames 12 close to each other. Two side blocks 14 are vertically slidably connected in the two side grooves 13, and a force-receiving rod 15 is horizontally fixed between the two side blocks 14. The bottom surface of the force-receiving rod 15 is fixed to an upper mounting plate 16, and the upper mounting plate 16 is located directly above the lower mounting plate 11. A plurality of upper mold structures 6 are arranged on the upper mounting plate 16 directly above the plurality of lower mold structures 5. The bottom surface of the workbench 1 is fixed to a frame 119, and the top surfaces of the two side frames 12 are fixed to a push rod 17. The middle part of the push rod 17 is fixed to a hydraulic cylinder 18, and the output end of the hydraulic cylinder 18 is fixed to the top surface of the force-receiving rod 15.

[0047] A T-shaped slot 120 is horizontally provided on the top surface of the lower mounting plate 11, the lower mold structure 5 includes a lower mold plate 51, a T-shaped strip 52 is fixedly connected to the bottom surface of the lower mold plate 51, a mold opening 53 is provided on the top surface of the lower mold plate 51, the T-shaped strip 52 is horizontally slidably connected in the T-shaped slot 120, a plurality of threaded tubes 121 are evenly fixedly provided on one side of the lower mounting plate 11, the threaded tubes 121 are threadedly connected to the locking bolts 122, the end of the locking bolts 122 contacts the side wall of the T-shaped strip 52, so as to facilitate the replacement of different types of lower mold mechanisms 5, a plurality of T-shaped slots 123 are provided on the bottom of the side wall of the upper mounting plate 16, the upper mold structure 6 includes an upper mold plate 61, and the upper mold plate The top surface of 61 is fixedly connected to the mounting strip 63, the bottom surface of the upper template 61 is fixedly connected to the pressing die 62, the mounting strip 63 is inserted in the T-shaped opening 123, two mounting blocks 64 are fixedly connected on both sides of the top surface of the mounting strip 63, the mounting blocks 64 are inserted in the side positions of the T-shaped opening 123, two mounting columns 124 are horizontally fixedly connected on both sides of the T-shaped opening 123, the ends of the mounting columns 124 are fixedly connected to the threaded columns 125, the mounting blocks 64 are horizontally provided with mounting openings 65, the mounting columns 124 pass through the mounting openings 65 and are fixedly connected to the threaded columns 125, the threaded columns 125 are threadedly connected to the hexagonal nuts 126, so as to facilitate the replacement of different types of upper mold structures 6.

[0048] Embodiment 3:

[0049] See also Figure 1-12, which is the third embodiment of the present invention. This embodiment is based on the above two embodiments. The present invention is used as follows. When in use, the first locking tooth plate 222 in the anti-shift mechanism 2 is meshed with the rack 212, the second locking tooth plate 236 is meshed with the first small pulley 232, and the first vacuum adsorption platform 27 is located at a lower position, and the second vacuum adsorption platform 45 in the workpiece fixing mechanism 4 is located at a higher position. The sheet metal part is placed on the second vacuum adsorption platform 45 in the workpiece fixing mechanism 4 and adsorbed and fixed. The anti-shift mechanism 2 and the workpiece fixing mechanism 4 are driven to move to the lower mold structure by the first screw rod 116, and then the workpiece fixing mechanism 4 rotates the sheet metal part so that the side that needs to be curled faces the lower mold structure. At the structure 5, the abutment mechanism 3 at this position adjusts the position of the side pressure plate 34 according to the curling position required, and then the sheet metal moves downward under the action of the workpiece fixing mechanism 4 and is located at the same height as the top of the lower mold structure 5. The first vacuum adsorption platform 27 moves up to adsorb the end of the sheet metal, and at the same time, the second vacuum adsorption platform 45 stops adsorption, and the vertical plate 22 moves horizontally until the end of the sheet metal contacts the side pressure plate 34, and then the first locking tooth plate 222 leaves the rack 212, and the vertical plate 22 continues to move horizontally until the spring 219 is fully compressed, and then the upper mold structure 6 is pressed down. After contacting the sheet metal, the second locking tooth plate 236 leaves the first small pulley 232, and at the same time, the fourth servo reduction motor 238 is powered off. After that, the upper mold structure 6 is pressed down to perform curling. During curling, the vertical plate 22 pushes the sheet metal under the action of the spring 219, and at the same time, the first vacuum adsorption platform 27 cooperates with the sheet metal to change the horizontal position, height position and angle to complete the curling work. After completion, the upper mold structure 6 moves up and away from the sheet metal, the first locking tooth plate 222 is engaged with the rack 212, the second locking tooth plate 236 is engaged with the first small pulley 232, and at the same time, the fourth servo reduction motor 238 rotates to make the first vacuum adsorption platform 27 horizontal, and then the anti-movement mechanism 2 adjusts the height and horizontal position of the sheet metal, places it on the second vacuum adsorption platform 45 and adsorbs it, and it can be fixed by the workpiece fixing mechanism 4, and the sheet metal is adjusted again. The curling operation is performed at other positions of the sheet metal part; the present invention sets an anti-movement mechanism 2 to limit the sheet metal part instead of the manual hand-supporting method. When the upper mold structure 6 is pressed down to curl the sheet metal part, the vertical plate 22 will apply an extrusion force to the sheet metal part under the action of the spring 219. When the sheet metal part is deformed, the side plate 25 will move with it, and the first vacuum adsorption platform 27 will also change its angle with the deformation angle of the sheet metal part, so that the first vacuum adsorption platform 27 always fixes the end of the sheet metal part, simulating the effect of human hands assisting the end of the sheet metal part, so that the sheet metal part will not be displaced during curling, avoiding the phenomenon of curling position offset, without manual operation, independent of personnel technology, and safer.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sheet metal hemming device for automobiles to avoid displacement of workpieces, comprising a workbench (1), characterized in that: The top surface of the workbench (1) is fixedly connected to the lower mounting plate (11), and a plurality of lower mold structures (5) are evenly arranged on the top surface of the lower mounting plate (11); a plurality of abutment mechanisms (3) are arranged on one side of the top surface of the workbench (1) corresponding to the positions of the plurality of lower mold structures (5); an anti-movement mechanism (2) is arranged on the other side of the top surface of the workbench (1); a through groove (112) is provided on the top surface of the workbench (1) at a position between the anti-movement mechanism (2) and the lower mounting plate (11), and a workpiece fixing mechanism (4) is arranged in the through groove (112); The anti-movement mechanism (2) comprises a horizontal plate (21) and a vertical plate (22), wherein the vertical plate (22) is horizontally slidably arranged on the top surface of the horizontal plate (21), and a power slide groove (23) is provided in the middle of one side of the vertical plate (22) close to the lower mold structure (5), and a power slider (24) is vertically slidably connected in the power slide groove (23), and the side wall of the power slider (24) is fixedly connected to the side plate (25), and the side wall of the side plate (25) is fixedly connected to the hinge seat (26), and the hinge seat (26) is rotatably connected to the end of the first vacuum adsorption platform (27); The top surface of the transverse plate (21) is provided with a top notch (28), and a first slide plate (29) and a second slide plate (210) are horizontally slidably connected in the top notch (28), and the second slide plate (210) is horizontally slidably connected in the top notch (28), and the second slide plate (210) is located between the first slide plate (29) and the lower mold structure (5), and two sliding columns (211) are horizontally fixed between the two ends of the first slide plate (29) and the two ends of the second slide plate (210), and two sliding sleeves (213) are horizontally slidably arranged on the two sliding columns (211), and the top surfaces of the two sliding sleeves (213) are fixedly connected to the mounting plate (215), and the vertical The bottom end of the plate (22) is fixedly connected to the top surface of the mounting plate (215), and the two sliding sleeves (213) are horizontally fixedly connected to the abutment plate (216). The first slide plate (29) is horizontally fixedly connected to a plurality of telescopic main rods (217) on one side close to the abutment plate (216). A telescopic slave rod (218) is horizontally slidably arranged at the end of the telescopic main rod (217), and the end of the telescopic slave rod (218) is fixedly connected to the side wall of the abutment plate (216). A spring (219) is sleeved on the telescopic main rod (217) and the telescopic slave rod (218), and the spring (219) is fixedly connected between the first slide plate (29) and the abutment plate (216).

2. The automobile sheet metal curling device for avoiding workpiece displacement according to claim 1, characterized in that: A sliding opening (214) is horizontally provided on the sliding sleeve (213), and the two side walls of the sliding opening (214) are in sliding contact with the two sides of the sliding column (211), and the top surface of the sliding column (211) is fixedly connected to the rack (212), and a top opening (221) is provided on the top surface of the sliding opening (214), and the top opening (221) is vertically slidably connected to the first locking tooth plate (222), and two first pneumatic push rods (220) are fixedly connected to the two sides of the top surface of the mounting plate (215), and the output end of the first pneumatic push rod (220) passes through the mounting plate (215) and the sliding sleeve (213) and is fixedly connected to the top surface of the first locking tooth plate (222), and the first locking tooth plate (222) is meshed with the rack (212).

3. The automobile sheet metal curling device for avoiding workpiece displacement according to claim 1, characterized in that: The middle part of the top notch (28) is horizontally rotatably connected to the second screw rod (223); the middle part of the first slide plate (29) is fixedly connected to the second threaded sleeve (224); the middle part of the second slide plate (210) is fixedly connected to the third threaded sleeve (225); the second screw rod (223) is threadedly sleeved on the second threaded sleeve (224) and the third threaded sleeve (225); an opening (226) is provided at the bottom of the middle part of the abutment plate (216); the second screw rod (223) passes through the opening (226); the end of the cross plate (21) is fixedly connected to the second servo reduction motor (227); the shaft end of the second servo reduction motor (227) is fixedly connected to the end of the second screw rod (223).

4. The automobile sheet metal curling device for avoiding workpiece displacement according to claim 1, characterized in that: The vertical plate (22) is located above and below the power slide groove (23) and is rotatably connected to two synchronous pulleys (228). The two synchronous pulleys (228) are sleeved with double-sided toothed synchronous belts (229). The top side wall of the vertical plate (22) is fixedly connected to a third servo reduction motor (230). The shaft end of the third servo reduction motor (230) is fixedly connected to the shaft of the synchronous pulley (228) located above. The power slider (24) is vertically provided with a through hole (231). The double-sided toothed synchronous belt (229) passes through the through hole (231). The through hole (231) is rotatably connected to a plurality of first small pulleys (232) on one side close to the side plate (25). The other side of the through hole (231) is rotatably connected to a plurality of second small pulleys (234). The first small pulleys The double-sided toothed synchronous belt (229) is meshedly connected to the second small pulley (232) and the second small pulley (234); a side opening (235) is provided in the power slider (24) near the position of the plurality of first small pulleys (232); the second locking tooth plate (236) is horizontally slidably connected in the side opening (235); the second locking tooth plate (236) is meshedly connected to the plurality of first small pulleys (232); a second pneumatic push rod (237) is fixedly connected in the power slider (24) and the side plate (25); the output end of the second pneumatic push rod (237) is fixedly connected to the center of the side wall of the second locking tooth plate (236); the side wall of the hinge seat (26) is fixedly connected to the fourth servo reduction motor (238); the rotating shaft end of the fourth servo reduction motor (238) is fixedly connected to the rotating shaft of the first vacuum adsorption platform (27).

5. The automobile sheet metal curling device for avoiding workpiece displacement according to claim 1, characterized in that: The vertical plate (22) is provided with two guide slots (239) at both sides of the power slot (23), and the guide slots (239) are vertically slidably connected to guide slide blocks (240), and the guide slide blocks (240) are fixedly connected to the side walls of the side plates (25). A column slot (241) is horizontally provided in the telescopic main rod (217), and a sliding hole (242) is provided at one end of the telescopic main rod (217) close to the stop plate (216), and the telescopic slave rod (218) is slidably sleeved in the sliding hole (242), and the end of the telescopic slave rod (218) is located in the column slot (241) and fixedly connected to a limiting circular plate (243), and the limiting circular plate (243) is horizontally slidably connected to the column slot (241).

6. The automobile sheet metal curling device for avoiding workpiece displacement according to claim 1, characterized in that: The resisting mechanism (3) comprises two guide grooves (31) horizontally opened on the top surface of the workbench (1), two guide bars (32) are horizontally slidably connected in the two guide grooves (31), the top surfaces of the two guide bars (32) are fixedly connected to a slide table (33), the top surface of the slide table (33) close to the top surface of the lower mold structure (5) is vertically fixedly connected to a side pressure plate (34), the top surface of the workbench (1) is fixedly connected to a first hydraulic push rod (35) near the position of the workbench (1), and the output end of the first hydraulic push rod (35) is fixedly connected to the side wall of the slide table (33).

7. The automobile sheet metal curling device for avoiding workpiece displacement according to claim 1, characterized in that: The workpiece fixing mechanism (4) comprises a sliding block (41), wherein the sliding block (41) is horizontally slidably connected to the sliding block (41) in the through groove (112), a second hydraulic push rod (42) is vertically fixedly sleeved on the sliding block (41), the top end of the output end of the second hydraulic push rod (42) is fixedly connected to a top platform (43), the top surface of the top platform (43) is rotatably connected to a rotating column (44), the top surface of the rotating column (44) is fixedly connected to a second vacuum adsorption table (45), the top surface of the top platform (43) is fixedly connected to a fifth servo reduction motor (46), the rotating shaft end of the fifth servo reduction motor (46) is fixedly connected to a driving gear (47), a driven gear ring (48) is fixedly sleeved on the rotating column (44), and the driving gear (47) is meshingly connected to the driven gear ring (48).

8. The automobile sheet metal curling device for preventing workpiece displacement according to claim 7, characterized in that: The top surface of the workbench (1) is provided with a T-shaped slide groove (110), the T-shaped slide groove (110) is horizontally slidably connected to a T-shaped slider (111), the top surface of the T-shaped slider (111) is fixedly connected to a sliding plate (115), the top surface of the sliding plate (115) is fixedly connected to the bottom surface of a horizontal plate (21) of an anti-movement mechanism (2), a connecting groove (113) is provided inside the workbench (1) at a position between the sliding plate (115) and the through groove (112), the connecting groove (113) is connected to the through groove (112), the connecting groove (113) is horizontally slidably connected to a connecting block (1 14), one side of the connecting block (114) is fixedly connected to the sliding block (41), the top surface of the connecting block (114) is fixedly connected to the bottom surface of the sliding plate (115), the T-shaped sliding groove (110) is horizontally rotatably connected to the first screw rod (116), the T-shaped sliding block (111) is fixedly connected to the first threaded sleeve (117), the first screw rod (116) is threadedly connected to the first threaded sleeve (117), the end of the workbench (1) is fixedly connected to the first servo reduction motor (118), and the end of the rotating shaft of the first servo reduction motor (118) is fixedly connected to the end of the first screw rod (116).

9. The automobile sheet metal curling device for avoiding workpiece displacement according to claim 1, characterized in that: Two side frames (12) are vertically fixed to the two sides of the workbench (1), two side grooves (13) are provided on one side of the two side frames (12) close to each other, two side blocks (14) are vertically slidably connected in the two side grooves (13), a force-receiving rod (15) is horizontally fixed between the two side blocks (14), the bottom surface of the force-receiving rod (15) is fixed to an upper mounting plate (16), the upper mounting plate (16) is located directly above the lower mounting plate (11), a plurality of upper mold structures (6) are arranged on the upper mounting plate (16) directly above the plurality of lower mold structures (5), the bottom surface of the workbench (1) is fixed to a frame (119), the top surfaces of the two side frames (12) are fixed to a push rod (17), the middle part of the push rod (17) is fixed to a hydraulic cylinder (18), and the output end of the hydraulic cylinder (18) is fixed to the top surface of the force-receiving rod (15).

10. The automobile sheet metal curling device for avoiding workpiece displacement according to claim 9, characterized in that: The top surface of the lower mounting plate (11) is horizontally provided with a T-shaped slot (120); the lower mold structure (5) comprises a lower mold plate (51); the bottom surface of the lower mold plate (51) is fixedly connected to a T-shaped strip (52); the top surface of the lower mold plate (51) is provided with a mold opening (53); the T-shaped strip (52) is horizontally slidably connected in the T-shaped slot (120); one side of the lower mounting plate (11) is evenly fixed with a plurality of threaded tubes (121); the threaded tubes (121) are threadedly connected to locking bolts (122); the ends of the locking bolts (122) contact the side walls of the T-shaped strips (52); the bottom of the side walls of the upper mounting plate (16) is provided with a plurality of T-shaped openings (123); the upper mold structure (6) comprises an upper mold plate (61); the upper mold The top surface of the plate (61) is fixedly connected to a mounting strip (63), the bottom surface of the upper template (61) is fixedly connected to a pressing die (62), the mounting strip (63) is inserted into a T-shaped opening (123), two mounting blocks (64) are fixedly connected to the two sides of the top surface of the mounting strip (63), the mounting blocks (64) are inserted into the side positions of the T-shaped opening (123), two mounting columns (124) are horizontally fixedly connected to the two sides of the T-shaped opening (123), the ends of the mounting columns (124) are fixedly connected to threaded columns (125), a mounting opening (65) is horizontally provided on the mounting block (64), the mounting column (124) passes through the mounting opening (65) and is fixedly connected to the threaded column (125), and the threaded column (125) is threadedly connected to a hexagonal nut (126).

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