Punching and bending tool for thin-wall metal part

Abstract

The invention relates to the technical field of punching and bending tools, and particularly discloses a thin-wall metal part punching and bending tool which comprises an upper die mechanism, a lower die mechanism, a conveying mechanism and a bottom plate, and an upper protection mechanism is arranged on the conveying mechanism; the upper protection mechanism comprises a film releasing assembly, a supporting assembly and a winding assembly, the film releasing assembly is arranged on the conveying mechanism, a protection film is wound on the film releasing assembly, and the supporting assembly is arranged on one side of the film releasing assembly; according to the thin-wall metal part punching and bending tool, a plate is conveyed to the lower die mechanism through the conveying mechanism, meanwhile, a protective film on the film unwinding assembly falls to the top of the plate around a movable roller, then the protective film is wound to the winding assembly along the top of the plate, and the protective film protects the top of the plate; when the plate is bent by the upper die mechanism, the protective film on the plate replaces the plate to be in contact with the upper die mechanism, so that scratches caused by friction between the upper die mechanism and the top of the plate can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of punching and bending tooling, and particularly relates to a punching and bending tooling for thin-walled metal parts. Background Art

[0002] A thin-walled metal part refers to a part or structural member made of metal material with a relatively thin wall thickness (usually less than a few millimeters, even reaching the micron level). Due to characteristics such as thin wall thickness, light weight, and low rigidity, such parts often face challenges such as deformation and precision control during the processing and manufacturing process. They are widely used in fields with high requirements for lightweight, strength, and space utilization. When processing thin-walled metal parts, punching and bending need to be performed on the thin-walled metal parts, so punching and bending tooling is required.

[0003] A stamping and forming device for profile processing disclosed in a Chinese patent document with the authorization announcement number CN115121711B. The stamping and forming device for profile processing includes a stamping die, a positioning assembly, a blanking assembly, and a demolding assembly. The positioning assembly includes a pressing and positioning mechanism and a clamping and positioning mechanism; symmetrically arranged on the opposite outer walls near the lower end of the stamping die are two horizontal installation slots, and each installation slot is respectively provided with a C-shaped support plate. The openings of the two C-shaped support plates face in opposite directions, and the upper ends of the two C-shaped support plates are fixedly connected with a horizontal top plate; the blanking assembly includes a square stamping block vertically installed on the lower surface of the horizontal top plate. The square stamping block can be rotated to change the surface, and a blanking knife is provided on the side wall of the square stamping block.

[0004] However, the structural design of the above-mentioned related technology: Although it can perform stamping and punching on the workpiece simultaneously, during the process of bending the thin-walled metal plate, a large friction will occur on the surface where the thin-walled metal plate slides with the die, which is likely to cause large scratches on the thin-walled metal plate after stamping, and even cause damage to the thin-walled metal plate in severe cases, thus affecting the product quality.

[0005] Therefore, a punching and bending tooling for thin-walled metal parts is proposed to solve the problems mentioned above. Summary of the Invention

[0006] The present invention provides a punching and bending tooling for thin-walled metal parts, aiming to solve the problem that scratches are easily generated on the surface of the thin-walled metal plate during the stamping process in the related technology.

[0007] The punching and bending tooling for thin-walled metal parts of the present invention includes an upper die mechanism, a lower die mechanism, a conveying mechanism, and a bottom plate. An upper protection mechanism is provided on the conveying mechanism to prevent the top of the plate from being scratched; The upper protection mechanism includes a film releasing component, a support component, and a winding component. The film releasing component is arranged on the conveying mechanism, and a protective film is wound on the film releasing component. The support component is arranged on one side of the film releasing component, and the winding component is arranged on the bottom plate. The end of the protective film on the film releasing component bypasses the support component and then falls onto the top of the plate, and then is wound onto the winding component along the moving direction of the plate, so that the protective film is laid on the top of the plate. The support component includes a movable roller, two elastic members, and two sliding members. The two elastic members are respectively installed on both sides of the conveying mechanism. The sliding members are elastically and slidably connected to the elastic members in the vertical direction. The movable roller is rotatably connected between the two sliding members. The sliding members are provided with pressing rods, and the upper die mechanism is provided with a pressing strip located above the pressing rods.

[0008] When punching and bending the plate, first, the plate is conveyed to the lower die mechanism through the conveying mechanism. At the same time, the protective film on the film releasing component is wound around the movable roller and falls onto the top of the plate. Then, the protective film is wound onto the winding component along the top of the plate, so that the protective film protects the top of the plate. When the upper die mechanism bends the plate, the protective film on the plate contacts the upper die mechanism instead of the plate, thereby avoiding scratches caused by friction between the upper die mechanism and the top of the plate, and improving the processing quality of the plate. During the downward movement of the upper die mechanism, the upper die mechanism presses down the pressing rods through the pressing strip, reducing the height of the movable roller to prevent the upper die mechanism from pulling the film releasing component to unwind the protective film through the protective film, and avoiding the protective film from extending too long and affecting the subsequent conveying of the plate.

[0009] Preferably, the film releasing component includes a film releasing roller and two support seats. The two support seats are both arranged on the conveying mechanism. The film releasing roller is rotatably connected between the two support seats, and the protective film is wound on the film releasing roller.

[0010] Preferably, the winding component includes a winding roller, a support roller, and two support plates. The two support plates are both installed on the bottom plate. The winding roller and the support roller are both rotatably connected between the two support plates. The winding roller is located below the support roller, and the end of the protective film is arranged on the winding roller.

[0011] By rotating the winding roller, the used protective film can be wound up, avoiding the used protective film from continuing to act on the top of the plate, thereby further ensuring the processing quality of the plate.

[0012] Preferably, the conveying mechanism includes a support table, a conveyor, a limit plate, and a limit groove. The support table is installed on the bottom plate. The conveyor is installed on the support table. The limit plate is installed on the top of one side of the conveyor, and the limit groove is opened at the bottom of the limit plate.

[0013] Preferably, a lower protection mechanism is provided on one side of the conveying mechanism. A protective film is provided on the lower protection mechanism. The lower protection mechanism can press the end of the protective film into the limiting groove, so that the protective film is laid on the bottom of the plate to protect the bottom of the plate.

[0014] Preferably, the lower protection mechanism includes a winding and unwinding component, a film pressing component and two film winding components. The winding and unwinding component is arranged on the support platform. The protective film is wound on the winding and unwinding component. The film pressing component is arranged on the elastic member. The two film winding components are respectively located on both sides of the conveyor and are installed on the support platform.

[0015] Through the film winding component, the protective film can be driven to move into the limiting groove and the protective film is pressed in the limiting groove, so that the protective film wraps around the end of the plate. When the plate is conveyed onto the lower die mechanism, the plate can drive the winding and unwinding component to unwind, so that the protective film covers the bottom of the plate, so as to avoid scratches when the plate is conveyed onto the lower die mechanism and further improve the processing quality of the plate.

[0016] Preferably, the winding and unwinding component includes a winding and unwinding roller and two connecting seats. The two connecting seats are both installed on the support platform. The winding and unwinding roller is rotatably connected between the two connecting seats. A hairspring is provided between one of the connecting seats and the winding and unwinding roller.

[0017] After the plate moves onto the lower die mechanism, the film winding component loosens the protective film. At this time, the hairspring can drive the winding and unwinding roller to rotate to wind up the protective film, so that the protective film can be reused.

[0018] Preferably, the film pressing component includes a pressing roller, a rotating rod and two vertical plates. The two vertical plates are respectively installed on the two elastic members. The pressing roller and the rotating rod are both rotatably connected between the two vertical plates. A gap for the protective film to pass through is provided between the pressing roller and the rotating rod.

[0019] Through the cooperative setting of the pressing roller and the rotating rod, the recycled protective film can be guided, so that the end of the protective film naturally hangs down onto the film winding component.

[0020] Preferably, the film winding component includes an inclined plate, a turntable and a film winding rod. The inclined plate is installed on the support platform. The turntable is rotatably connected to one side of the inclined plate. The film winding rod is installed at the edge position of one end of the turntable.

[0021] Preferably, a cutting mechanism is provided between the lower die mechanism and the support platform. The cutting mechanism is located below the limiting plate to cut the plate.

[0022] By providing the cutting mechanism, the plate can be cut, so that the plate can be continuously loaded without pre-cutting the plate in advance.

[0023] With the above technical solution, the beneficial effects of the present invention are as follows: When punching and bending a sheet, the sheet is first conveyed to the lower die mechanism by a conveying mechanism, and at the same time, the protective film on the film placing assembly falls onto the top of the sheet around the movable roller, and then the protective film is wound onto the winding assembly along the top of the sheet to protect the top of the sheet. When the upper die mechanism bends the sheet, the protective film on the sheet contacts the upper die mechanism instead of the sheet, so as to avoid scratches caused by friction between the upper die mechanism and the top of the sheet, thereby improving the processing quality of the sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment in the present invention.

[0025] Figure 2 It is a schematic diagram of the structure of the upper die mechanism of a specific embodiment in the present invention.

[0026] Figure 3 It is a schematic diagram of the internal structure of the mounting seat of a specific embodiment in the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of the buffer assembly of a specific embodiment in the present invention.

[0028] Figure 5 It is a schematic diagram of the internal structure of the lower module of a specific embodiment in the present invention.

[0029] Figure 6 It is a schematic diagram of the structure of the upper protection mechanism of a specific embodiment in the present invention.

[0030] Figure 7 It is a schematic diagram of the structure of the mounting bracket of a specific embodiment in the present invention.

[0031] Figure 8 For a specific embodiment in the present invention Figure 7 The enlarged schematic diagram of part A.

[0032] Figure 9 It is a schematic diagram of the internal structure of the mounting plate of a specific embodiment in the present invention.

[0033] Figure 10 It is a schematic diagram of the structure of the winding assembly of a specific embodiment in the present invention.

[0034] Figure 11 It is a schematic diagram of the structure of the winding and unwinding assembly of a specific embodiment in the present invention.

[0035] Figure 12 It is a schematic diagram of the structure of the pressure roller of a specific embodiment in the present invention.

[0036] Figure 13Structural schematic diagram of the film winding assembly in the specific embodiment of the present invention.

[0037] Reference numerals: 10. Upper die mechanism; 11. Support frame; 12. Cross beam; 13. Hydraulic cylinder 1; 14. Upper die assembly; 141. Mounting seat; 142. Fixed column; 143. Pressure strip; 144. Bending block; 145. Stamping part; 146. Movable rod; 147. Pressure block; 148. Chute; 15. Buffer assembly; 151. Slide rod; 152. Connecting plate 1; 153. Spring 1; 154. Connecting plate 2; 20. Lower die mechanism; 21. Lower die block; 22. Stamping hole; 23. Scrap hole; 30. Conveying mechanism; 31. Support table; 32. Conveyor; 33. Limit plate; 34. Limit groove; 40. Upper protection mechanism; 41. Film releasing assembly; 411. Support seat; 412. Film releasing roller; 42. Support assembly; 421. Mounting plate; 422. Slide plate; 423. Movable roller; 424. Pressure rod; 425. Support block; 426. Spring 2; 43. Rewinding assembly; 431. Support plate; 432. Rewinding roller; 433. Motor 1; 434. Support roller; 50. Lower protection mechanism; 51. Rewinding and releasing assembly; 511. Rewinding and releasing roller; 512. Connecting seat; 52. Film pressing assembly; 521. Vertical plate; 522. Pressing roller; 523. Rotating rod; 53. Film winding assembly; 531. Inclined plate; 532. Turntable; 533. Film winding rod; 534. Rotating rod; 535. Pulley 1; 54. Driving assembly; 541. Rotating shaft; 542. Vertical plate; 543. Pulley 2; 544. Motor 2; 60. Cutting mechanism; 61. Mounting frame; 62. Hydraulic cylinder 2; 63. Slide column; 64. Fixed plate; 65. Cutting knife; 66. Limit rod; 67. Pressure plate; 68. Spring 3; 70. Bottom plate. Detailed implementation manners

[0038] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, but should not be construed as a limitation to the present invention.

[0039] As Figures 1 to 13As shown in the figure, the punching and bending tooling for thin-walled metal parts of the present invention includes an upper die mechanism 10, a lower die mechanism 20, a conveying mechanism 30, an upper protection mechanism 40, a lower protection mechanism 50, a cutting mechanism 60 and a bottom plate 70. The lower die mechanism 20 is installed on one side of the top of the bottom plate 70, and the upper die mechanism 10 is arranged above the lower die mechanism 20 to punch and bend the sheet. The conveying mechanism 30 is installed on the other side of the top of the bottom plate 70 to convey the sheet. The upper protection mechanism 40 is arranged on the conveying mechanism 30, and the lower protection mechanism 50 is arranged on one side of the conveying mechanism 30. A protective film is provided on the upper protection mechanism 40, and a protective film is provided on the lower protection mechanism 50 to protect the top and bottom of the sheet. The cutting mechanism 60 is installed between the lower die mechanism 20 and the conveying mechanism 30 to cut the sheet.

[0040] When punching the sheet, the conveying mechanism 30 drives the end of the sheet to move downward to the top of the lower die mechanism 20. During the movement of the sheet, the lower protection mechanism 50 releases the protective film to cover the bottom of the sheet to protect the bottom of the sheet and reduce the friction between the bottom of the sheet and the lower die mechanism 20, preventing the lower die mechanism 20 from scratching the sheet. At the same time, the upper protection mechanism 40 releases the protective film to cover the top of the sheet to protect the top of the sheet and avoid scratching when the upper die mechanism 10 bends the sheet. When the sheet stops being conveyed, the lower protection mechanism 50 retracts the protective film. At this time, the cutting mechanism 60 cuts the sheet to enable the sheet to perform a bending operation.

[0041] As Figures 1 to 2 shown, there are a support frame 11, a cross beam 12, a first hydraulic cylinder 13, an upper die assembly 14 and a buffer assembly 15. There are two groups of support frames 11, and the number of each group of support frames 11 is two. The bottom of the support frame 11 is installed on the top of the bottom plate 70, and the two groups of support frames 11 are respectively installed on both sides of the cross beam 12. The first hydraulic cylinder 13 is installed on the top of the cross beam 12, and the upper die assembly 14 is installed at the movable end of the first hydraulic cylinder 13. The number of buffer assemblies 15 is two, and the two buffer assemblies 15 are respectively arranged on both sides of the upper die assembly 14.

[0042] When stamping the sheet, the first hydraulic cylinder 13 drives the upper die assembly 14 to move downward and cooperate with the lower die mechanism 20 to press the sheet, and then the first hydraulic cylinder 13 drives the upper die assembly 14 to continue to move downward to punch and bend the sheet.

[0043] As Figures 2 to 3As shown in the figure, the upper die assembly 14 includes a mounting base 141, a fixed column 142, a pressing strip 143, a bending block 144, a stamping part 145, a movable rod 146, a pressing block 147, and a sliding groove 148. The bottom end of the fixed column 142 is mounted on the top of the mounting base 141, and the top end of the fixed column 142 is fixed to the movable end of the first hydraulic cylinder 13. There are two pressing strips 143, and both of the two pressing strips 143 are mounted on the side of the mounting base 141 facing the conveying mechanism 30. There are two bending blocks 144, and the two bending blocks 144 are respectively mounted on both sides of the bottom of the mounting base 141, and the bottom sides of the opposite sides of the two bending blocks 144 both have inclined surfaces.

[0044] The stamping part 145 is mounted in the middle of the lower surface of the mounting base 141. The pressing block 147 is located outside the stamping part 145, and a hole for the stamping part 145 to pass through is provided on the pressing block 147. There are two movable rods 146, and the two movable rods 146 are respectively mounted on both sides of the top of the pressing block 147. The shape of the movable rod 146 is T-shaped. There are two sliding grooves 148, and the two sliding grooves 148 are respectively provided on both sides inside the mounting base 141. The top end of the movable rod 146 is slidably connected inside the sliding groove 148.

[0045] When punching the sheet metal, the first hydraulic cylinder 13 drives the mounting base 141 to move downward through the fixed column 142. At the same time, the mounting base 141 drives the pressing block 147 to move downward through the movable rod 146 and contact the sheet metal. As the mounting base 141 continues to move downward, the pressing block 147 gradually compresses the sheet metal, the movable rod 146 gradually enters the sliding groove 148, and at the same time, the stamping part 145 punches the sheet metal through the pressing block 147. Then the mounting base 141 continues to move downward and drives the bending block 144 to bend the sheet metal.

[0046] As Figures 1 to 4 shown, the buffer assembly 15 includes a sliding rod 151, a first connecting plate 152, a first spring 153, and a second connecting plate 154. The sliding rod 151 is mounted on the top of the bottom plate 70. The first connecting plate 152 and the second connecting plate 154 are both slidably connected to the outside of the sliding rod 151. The first connecting plate 152 is mounted on one side of the mounting base 141, and the second connecting plate 154 is mounted on one side of the pressing block 147. The first spring 153 is sleeved on the outside of the sliding rod 151, and the first spring 153 is mounted between the first connecting plate 152 and the second connecting plate 154.

[0047] During the downward movement of the mounting base 141, the mounting base 141 drives the first connecting plate 152 to move downward synchronously. At the same time, the pressing block 147 drives the second connecting plate 154 to move downward synchronously. When the pressing block 147 contacts the sheet metal, as the mounting base 141 continues to move downward, the first spring 153 is gradually compressed to make the pressing block 147 compress the sheet metal.

[0048] As Figure 1 、 Figure 3 and Figure 5As shown, the lower die mechanism 20 includes a lower die block 21, a punching hole 22, and a waste hole 23. The lower die block 21 is installed on the top of the bottom plate 70 and directly below the pressing block 147. Bevels adapted to the bending blocks 144 are provided on both sides of the lower die block 21 to bend the sheet material. The punching hole 22 is opened at the top of the lower die block 21, and the waste hole 23 is opened inside the lower die block 21 and communicates with the punching hole 22. A discharge channel communicating with the waste hole 23 is opened on one side of the lower die block 21 to discharge the waste after punching from the lower die block 21.

[0049] After the stamping part 145 passes through the sheet material, the stamping part 145 drives the waste generated by stamping into the punching hole 22. At this time, the waste falls into the waste hole 23 along the punching hole 22 and is discharged from the lower die block 21.

[0050] As Figure 1 and Figures 6 to 8 shown, the conveying mechanism 30 includes a support table 31, a conveyor 32, a limit plate 33, and a limit groove 34. The support table 31 is installed on the top of the bottom plate 70, and the conveyor 32 is installed on the top of the support table 31. The conveyor 32 is a roller-type conveying device, and the roller-type conveying device belongs to the prior art, and its specific structure will not be described in detail here. The conveyor 32 has a feed inlet and a discharge outlet. The limit plate 33 is installed on the top of one side of the discharge outlet of the conveyor 32, and the limit groove 34 is opened on the bottom side of the limit plate 33.

[0051] When conveying the sheet material onto the lower die block 21, the conveyor 32 drives the sheet material to move towards the top of the lower die block 21. During the process of the end of the sheet material moving towards the lower die block 21, the lower protection mechanism 50 presses the end of the protective film into the limit groove 34 of the limit plate 33 to wrap the end of the sheet material. As the sheet material continues to move, the sheet material drives the protective film to gradually move, so that the protective film in the lower protection mechanism 50 is located on the top and bottom of the sheet material, preventing the sheet material from being scratched when sliding on the lower die block 21. When the sheet material moves to the lower die block 21, the lower protection mechanism 50 releases the limit on the end of the protective film and winds up the protective film. At this time, the end of the protective film gradually moves to the bottom of the sheet material and returns to the lower protection mechanism 50 from the bottom of the sheet material.

[0052] As Figure 1 and Figure 6 shown, the upper protection mechanism 40 includes a film releasing component 41, a support component 42, and a winding component 43. The film releasing component 41 is arranged on the support table 31, and the protective film is wound around the film releasing component 41. The protective film on the film releasing component 41 is made of PE material. The support component 42 is arranged on the conveyor 32 and on one side of the film releasing component 41, and the winding component 43 is arranged on the top side of the bottom plate 70.

[0053] The end of the protective film on the film releasing component 41 bypasses the support component 42 and then falls onto the top of the sheet material, and then winds around the winding component 43 along the moving direction of the sheet material.

[0054] As Figures 6 to 7 shown, the film releasing assembly 41 includes a support base 411 and a film releasing roller 412. There are two support bases 411, and the two support bases 411 are respectively installed on both sides of the top of the support table 31. The film releasing roller 412 is rotatably connected between the two support bases 411 and is located above the conveyor 32. The protective film is wound around the film releasing roller 412.

[0055] As Figures 6 to 7 and Figure 9 shown, the support assembly 42 includes an elastic member, a sliding member, and a movable roller 423. There are two elastic members and two sliding members. The two elastic members are respectively installed on both sides of the conveyor 32 and are arranged near the discharge port of the conveyor 32. The sliding member is slidably connected to the top of the elastic member.

[0056] The sliding member includes a sliding plate 422 and a pressing rod 424. The sliding plate 422 is in a T shape. The bottom of the sliding plate 422 is slidably connected to the inside of the elastic member. The movable roller 423 is rotatably connected between the two sliding plates 422. The pressing rod 424 is installed on one side of the sliding plate 422, and the pressing rod 424 is located below the pressing strip 143.

[0057] The elastic member includes a mounting plate 421, a support block 425, and a second spring 426. The support block 425 is installed on one side of the conveyor 32. The mounting plate 421 is installed on the top of the support block 425. The second spring 426 is installed between the inner wall of the mounting plate 421 and the bottom of the sliding plate 422 to drive the movable roller 423 to reset.

[0058] The end of the protective film on the film releasing roller 412 bypasses the movable roller 423 and then falls onto the top of the plate, and then is wound onto the winding assembly 43 along the moving direction of the plate. When the pressing block 147 contacts the plate, the pressing strip 143 on the mounting seat 141 contacts the pressing rod 424. As the mounting seat 141 continues to move downward, the mounting seat 141 drives the pressing rod 424 to move downward through the pressing strip 143. At this time, the pressing rod 424 drives the movable roller 423 to move downward through the sliding plate 422, so that the height of the movable roller 423 is reduced. To avoid that when the plate is bent, the bending block 144 pulls the film releasing roller 412 to unwind through the protective film, and to avoid that the protective film extends too long and affects the subsequent conveying of the plate. At the same time, through the protective film located on the top of the plate, it can be avoided that the bending block 144 directly contacts the plate and causes the plate to be scratched, thereby improving the processing quality of the plate.

[0059] As Figure 6 and Figure 10As shown in the figure, the winding assembly 43 includes a support plate 431, a winding roller 432, a first motor 433, and a support roller 434. There are two support plates 431, and both of the two support plates 431 are installed on the top of the bottom plate 70. The winding roller 432 and the support roller 434 are both rotatably connected between the two support plates 431, and the winding roller 432 is located below the support roller 434. The first motor 433 is installed on one side of one of the support plates 431, and the drive shaft of the first motor 433 is connected to one end of the winding roller 432.

[0060] The end of the protective film on the film unwinding roller 412 bypasses the movable roller 423 and then falls onto the top of the plate, and then winds around the support roller 434 along the moving direction of the plate and winds onto the winding roller 432. When the plate is bent, the first motor 433 drives the winding roller 432 to rotate, and winds the protective film located on the top of the plate onto the winding roller 432, so as to prevent the protective film damaged by the bending block 144 from continuing to be used in the original position.

[0061] As Figure 6 and Figure 11 As shown in the figure, the lower protective mechanism 50 includes a winding and unwinding assembly 51, a film pressing assembly 52, a film winding assembly 53, and a driving assembly 54. The winding and unwinding assembly 51 is arranged at the bottom of one side of the support table 31, and the protective film is wound on the winding and unwinding assembly 51. The protective film on the winding and unwinding assembly 51 is made of PVE material, and the width of the protective film is greater than the width of the plate. The film pressing assembly 52 is arranged at the bottom of the support block 425. There are two film winding assemblies 53, and the two film winding assemblies 53 are respectively located on both sides of the conveyor 32 and are installed on the support table 31. The driving assembly 54 is installed on the top of the bottom plate 70 and close to one side of the support table 31, and the driving assembly 54 is in transmission connection with the two film winding assemblies 53 to drive the film winding assemblies 53 to rotate.

[0062] When the driving assembly 54 drives the film winding assemblies 53 to rotate, the film winding assemblies 53 can drive the ends of the protective film to press into the limiting grooves 34 of the limiting plate 33, so that the protective film on the winding and unwinding assembly 51 wraps the ends of the plate.

[0063] Continue to refer to Figure 6 and Figure 11 As shown in the figure, the winding and unwinding assembly 51 includes a winding and unwinding roller 511 and a connecting seat 512. There are two connecting seats 512, and both of the two connecting seats 512 are installed at the bottom of one side of the support table 31. The winding and unwinding roller 511 is rotatably connected between the two connecting seats 512, and a hairspring (not shown in the figure) is provided between one of the connecting seats 512 and the winding and unwinding roller 511, so that the winding and unwinding roller 511 drives the protective film to wind up.

[0064] As Figure 6 and Figures 11 to 12As shown, the film pressing assembly 52 includes a vertical plate 521, a pressing roller 522, and a rotating rod 523. There are two vertical plates 521, and the two vertical plates 521 are respectively installed at the bottoms of the two support blocks 425. The pressing roller 522 and the rotating rod 523 are both rotatably connected between the two vertical plates 521, and there is a gap for the protective film to pass through between the pressing roller 522 and the rotating rod 523.

[0065] As Figure 6 and Figures 11 to 13 shown, the film winding assembly 53 includes an inclined plate 531, a turntable 532, a film winding rod 533, a rotating rod 534, and a first pulley 535. The inclined plate 531 is installed at the top of one side of the support table 31, and the turntable 532 is rotatably connected to one side of the inclined plate 531. The film winding rod 533 is installed at the edge position of one end of the turntable 532, and the film winding rod 533 is located on one side of the plate. A silicone sleeve is provided on the outer side of the film winding rod 533 to increase the friction between the film winding rod 533 and the protective film. The protective film on the winding and unwinding roller 511 passes through the gap between the pressing roller 522 and the rotating rod 523 and falls to one side of the film winding rod 533. One end of the rotating rod 534 is installed at the other end of the turntable 532, the other end of the rotating rod 534 penetrates through the inclined plate 531 and extends to the outside of the inclined plate 531, and the first pulley 535 is installed on the outer side of the other end of the rotating rod 534.

[0066] When the turntable 532 rotates, the turntable 532 drives the end of the protective film to press in the limiting groove 34 of the limiting plate 33 through the film winding rod 533, so that the protective film on the winding and unwinding roller 511 wraps the end of the plate. When the plate moves, the plate drives the winding and unwinding roller 511 to rotate through the protective film, so that the winding and unwinding roller 511 continuously releases the protective film, and at the same time, the spring between the connecting seat 512 and the winding and unwinding roller 511 contracts. When the film winding rod 533 resets, the spring between the connecting seat 512 and the winding and unwinding roller 511 resets, thereby driving the winding and unwinding roller 511 to rotate in the reverse direction to wind up the protective film.

[0067] As Figure 6 and Figure 11 shown, the driving assembly 54 includes a rotating shaft 541, a vertical plate 542, a second pulley 543, and a second motor 544. There are two vertical plates 542, the rotating shaft 541 is rotatably connected between the two vertical plates 542, and the vertical plates 542 are installed at the top of the bottom plate 70 and close to one side of the support table 31. There are two second pulleys 543, and the two second pulleys 543 are respectively installed on the outer sides of the two ends of the rotating shaft 541. The first pulley 535 and the second pulley 543 are connected by a belt drive. The second motor 544 is installed on one side of one of the vertical plates 542, and the drive shaft of the second motor 544 is connected to one end of the rotating shaft 541.

[0068] The second motor 544 drives the second pulley 543 to rotate through the rotating shaft 541. The second pulley 543 drives the winding rod 533 on the turntable 532 to rotate through the rotating rod 534 on the first pulley 535, so that the winding rod 533 drives the end of the protective film to press in the limiting groove 34 of the limiting plate 33.

[0069] As Figures 6 to 8 and Figure 11 shown, the cutting mechanism 60 includes a mounting frame 61, a second hydraulic cylinder 62, a sliding column 63, a fixing plate 64, a cutting knife 65, a pressing plate 67 and a limiting member. The mounting frame 61 is U-shaped and is mounted on the top of the bottom plate 70 and close to one side of the vertical plate 542. The second hydraulic cylinder 62 is mounted on the inner bottom wall of the mounting frame 61. The bottom end of the sliding column 63 is mounted on the movable end of the second hydraulic cylinder 62, and the top end of the sliding column 63 penetrates through the mounting frame 61 and extends to the outside of the mounting frame 61. The fixing plate 64 is mounted on the top end of the sliding column 63, and the cutting knife 65 is mounted on the top of the fixing plate 64. The pressing plate 67 is located outside the cutting knife 65 and is arranged directly below the limiting plate 33. A groove for the cutting knife 65 to pass through is formed in the pressing plate 67.

[0070] There are multiple limiting members, and the multiple limiting members are respectively mounted on both sides of the bottom of the pressing plate 67. The limiting member includes a limiting rod 66 and a third spring 68. The top end of the limiting rod 66 is mounted on the bottom of the pressing plate 67, and the bottom end of the limiting rod 66 penetrates through the fixing plate 64 and extends to the outside of the fixing plate 64. The third spring 68 is sleeved on the outside of the limiting rod 66 and is mounted between the fixing plate 64 and the pressing plate 67 to drive the pressing plate 67 to reset.

[0071] When the protective film on the winding and unwinding roller 511 is completely wound, the second hydraulic cylinder 62 drives the cutting knife 65 to move upward through the fixing plate 64 on the sliding column 63, and at the same time, the pressing plate 67 moves upward synchronously with the fixing plate 64. When the pressing plate 67 contacts the plate, the plate is located between the limiting plate 33 and the pressing plate 67. As the fixing plate 64 continues to move upward, the third spring 68 is compressed. At this time, the plate is pressed tightly by the limiting plate 33 and the pressing plate 67, and then the fixing plate 64 drives the cutting knife 65 to pass through the pressing plate 67 and cut the plate, so as to facilitate the subsequent bending operation of the plate.

[0072] Working principle: When punching and bending the plate, the conveyor 32 drives the plate to move upward on the lower module 21. During the process of the end of the plate moving downward on the lower module 21, the second motor 544 drives the belt pulley two 543 to rotate through the rotating shaft 541. The belt pulley two 543 drives the winding rod 533 on the turntable 532 to rotate through the rotating rod 534 on the belt pulley one 535. At this time, the winding rod 533 drives the end of the protective film to press into the limiting groove 34 of the limiting plate 33, so that the protective film on the winding and unwinding roller 511 wraps the end of the plate. As the plate continues to move, the plate drives the protective film to gradually move, so that the protective film on the winding and unwinding roller 511 is located at the top and bottom of the plate, avoiding scratches caused by the plate sliding on the lower module 21. When the plate moves onto the lower module 21, the second motor 544 drives the rotating shaft 541 to reverse, so that the winding rod 533 resets, thereby releasing the limit on the end of the protective film, and enabling the winding and unwinding roller 511 to wind up the protective film. At this time, the end of the protective film gradually moves to the bottom of the plate and gradually separates from the plate. After the protective film completely separates from the plate, it naturally droops and leans against one side of the winding rod 533, facilitating subsequent use.

[0073] Meanwhile, the end of the protective film on the film releasing roller 412 bypasses the movable roller 423 and then falls onto the top of the plate, and then winds around the supporting roller 434 along the moving direction of the plate and winds onto the winding roller 432 to protect the top of the plate.

[0074] When bending the plate, the mounting seat 141 drives the pressure bar 424 to move downward through the pressure strip 143. The pressure bar 424 drives the movable roller 423 to move downward through the slide plate 422, reducing the height of the movable roller 423, avoiding that when bending the plate, the bending block 144 pulls the film releasing roller 412 to unwind through the protective film. At the same time, through the protective film located on the top of the plate, instead of the plate contacting the bending block 144, it can avoid the bending block 144 directly contacting the plate and causing scratches to the plate, thereby improving the processing quality of the plate.

[0075] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A thin-walled metal part punching and bending tool, comprising an upper die mechanism (10), a lower die mechanism (20), a conveying mechanism (30) and a bottom plate (70), characterized in that: An upper protection mechanism (40) is provided on the conveying mechanism (30) to prevent the top of the plate from being scratched; The upper protective mechanism (40) comprises a film laying component (41), a support component (42) and a winding component (43); the film laying component (41) is arranged on the conveying mechanism (30); a protective film is wound on the film laying component (41); the support component (42) is arranged on one side of the film laying component (41); the winding component (43) is arranged on the bottom plate (70); the end of the protective film on the film laying component (41) passes around the support component (42) and falls to the top of the plate, and then is wound along the moving direction of the plate onto the winding component (43), so that the protective film is laid on the top of the plate; The support assembly (42) comprises a movable roller (423), two elastic members and two sliding members, the two elastic members are respectively mounted on both sides of the conveying mechanism (30), the sliding members are elastically slidably connected to the elastic members in the vertical direction, the movable roller (423) is rotatably connected between the two sliding members, the sliding members are provided with a pressure rod (424), and the upper mold mechanism (10) is provided with a pressure strip (143) located above the pressure rod (424).

2. The thin-walled metal part punching and bending tool according to claim 1, characterized in that: The film placing assembly (41) comprises a film placing roller (412) and two support seats (411), the two support seats (411) are both arranged on the conveying mechanism (30), the film placing roller (412) is rotatably connected between the two support seats (411), and the protective film is wound on the film placing roller (412).

3. The thin-walled metal part punching and bending tool according to claim 1, characterized in that: The winding assembly (43) comprises a winding roller (432), a support roller (434) and two support plates (431), wherein the two support plates (431) are both mounted on a bottom plate (70), the winding roller (432) and the support roller (434) are both rotatably connected between the two support plates (431), the winding roller (432) is located below the support roller (434), and the end of the protective film is arranged on the winding roller (432).

4. The thin-walled metal part punching and bending tool according to any one of claims 1 to 3, characterized in that: The conveying mechanism (30) comprises a support platform (31), a conveyor (32), a limit plate (33) and a limit groove (34); the support platform (31) is mounted on a bottom plate (70); the conveyor (32) is mounted on the support platform (31); the limit plate (33) is mounted on the top of one side of the conveyor (32); and the limit groove (34) is provided at the bottom of the limit plate (33).

5. The thin-walled metal part punching and bending tool according to claim 4, characterized in that: A lower protective mechanism (50) is provided on one side of the conveying mechanism (30), and a protective film is provided on the lower protective mechanism (50). The lower protective mechanism (50) can press the end of the protective film into the limiting groove (34) so ​​that the protective film is laid on the bottom of the plate to protect the bottom of the plate.

6. The thin-walled metal part punching and bending tool according to claim 5, characterized in that: The lower protection mechanism (50) comprises a retractable assembly (51), a film pressing assembly (52) and two film winding assemblies (53); the retractable assembly (51) is arranged on a support platform (31); the protective film is wound on the retractable assembly (51); the film pressing assembly (52) is arranged on an elastic member; and the two film winding assemblies (53) are respectively located on two sides of the conveyor (32) and mounted on the support platform (31).

7. The thin-walled metal part punching and bending tool according to claim 6, characterized in that: The retractable assembly (51) comprises a retractable roller (511) and two connecting seats (512), the two connecting seats (512) being mounted on a support platform (31), the retractable roller (511) being rotatably connected between the two connecting seats (512), and a spring being provided between one of the connecting seats (512) and the retractable roller (511).

8. The thin-walled metal part punching and bending tool according to claim 6, characterized in that: The film pressing assembly (52) comprises a pressing roller (522), a rotating rod (523) and two vertical plates (521); the two vertical plates (521) are respectively mounted on two elastic members; the pressing roller (522) and the rotating rod (523) are both rotatably connected between the two vertical plates (521); and a gap is provided between the pressing roller (522) and the rotating rod (523) for the protective film to pass through.

9. The thin-walled metal part punching and bending tool according to claim 6, characterized in that: The film winding assembly (53) comprises an inclined plate (531), a rotating disk (532) and a film winding rod (533); the inclined plate (531) is mounted on a support platform (31); the rotating disk (532) is rotatably connected to one side of the inclined plate (531); and the film winding rod (533) is mounted at an edge position of one end of the rotating disk (532).

10. The thin-walled metal part punching and bending tool according to claim 6, characterized in that: A cutting mechanism (60) is provided between the lower die mechanism (20) and the support platform (31), and the cutting mechanism (60) is located below the limiting plate (33) to cut the plate.

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