A traceless bending die for metal sheets

Abstract

The present invention discloses a traceless bending die for metal sheets, which includes a base, two support seats oppositely arranged on the base, two rotating seats rotatably arranged on the two support seats respectively, a fixed support plate arranged on the top of the rotating seats, a conveying mechanism arranged on the fixed support plate, and a punch for moving down and pushing the sheet; the conveying mechanism is used to support the sheet, a driving wheel is arranged at one end of the conveying mechanism, and a friction wheel is arranged on the side wall of the rotating seat, and the friction wheel is matched with the driving wheel to drive the driving wheel to rotate synchronously. Through the linkage relationship between the friction wheel and the driving wheel, the present invention enables the driving wheel to drive the conveying mechanism to rotate synchronously during the bending process, so that the part of the conveying mechanism in contact with the sheet and the sheet always move synchronously, thereby realizing traceless bending, reducing the risk of scratches and wear on the surface of the sheet, and improving the bending effect of the metal sheet.

Description

Technical Field

[0001] The present invention belongs to the technical field of bending dies, and particularly relates to a scratch-free bending die for metal sheets. Background Art

[0002] During the bending process of metal sheets, the sheets will slide relative to the die, making it easy for the surfaces of the sheets to have defects such as scratches and abrasions. These surface defects not only affect the aesthetics of the sheets, but also reduce the quality of the sheets, which will affect subsequent processing, may lead to a decrease in the corrosion resistance and fatigue life of the sheets, etc., and thus affect the qualified rate of the products. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies in the prior art, the present invention provides a scratch-free bending die for metal sheets, which reduces the risk of scratches generated when bending the metal sheets and improves the bending effect of the metal sheets.

[0004] Technical Solution: To achieve the above object, the present invention provides a scratch-free bending die for metal sheets, including a base, two support seats oppositely arranged on the base, two rotating seats rotatably arranged on the two support seats respectively, a fixed support plate arranged on the top of the rotating seats, a conveying mechanism arranged on the fixed support plate, and a punch for moving downwards and pushing the sheet.

[0005] The conveying mechanism is used to support the sheet. A driving wheel is arranged at one end of the conveying mechanism, and a friction wheel is arranged on the side wall of the rotating seat. The friction wheel is matched with the driving wheel to drive the driving wheel to rotate synchronously.

[0006] Further, teeth meshing with the driving wheel are arranged on the inner side of the conveying mechanism facing the fixed support plate.

[0007] Further, a friction plate is arranged on the side wall of the support seat. The friction plate has an arc surface adapted to the rotation arc of the rotating seat, and the friction wheel abuts against the arc surface.

[0008] Further, a transmission gear is arranged between the friction wheel and the driving wheel. Teeth are arranged on the friction wheel. The friction wheel meshes with the transmission gear through the teeth, and the transmission gear meshes with the driving wheel.

[0009] Further, a plurality of oil grooves arranged side by side are formed on the surface of the fixed support plate. Lubricating oil is filled in the oil grooves. A movable plate that can move in the vertical direction is arranged at the notch of the oil groove, and the top surface of the movable plate abuts against the teeth. A plurality of through holes are arranged on the movable plate.

[0010] Further, an oil inlet assembly is provided at the bottom of the fixed support plate for controlling the amount of lubricating oil in the oil sump; the oil inlet assembly includes a housing, a top block, and a compression spring. The housing is disposed at the bottom end of the fixed support plate and has a flow passage formed therein that communicates with the oil sump. The end of the flow passage close to the oil sump is conical and gradually expands from the end close to the oil sump to the other end. The top block is movably disposed in the flow passage, and the shape of the top block is adapted to the flow passage; the top end of the top block extends out of the housing and abuts against the bottom surface of the moving plate; the compression spring is disposed in the flow passage, with one end abutting against the bottom end of the top block and the other end abutting against the housing.

[0011] Further, a tension spring is provided on the side of the support base. One end of the tension spring is connected to the base, and the other end is connected to the side of the rotating seat.

[0012] Further, a screw is provided on the base, and a first external thread and a second external thread are formed on the screw;

[0013] The first external thread and the second external thread have opposite helix directions, and the first external thread and the second external thread respectively pass through a support base; internal threads adapted to the first external thread and the second external thread are respectively formed on the two support bases;

[0014] A rotating handle is connected to the end of the screw for controlling the rotation of the screw to move the two support bases closer to or away from each other.

[0015] Further, the punch includes a first member and a second member disposed opposite to each other, and the distance between the first member and the second member is adjustable.

[0016] Further, the traceless bending die further includes a support plate detachably mounted on the base. The support plate is disposed between the two support bases and below the punch. A support spring is provided between the support plate and the base for supporting the support plate.

[0017] Beneficial effects: Compared with the prior art, the present invention realizes traceless bending by providing a rotatable conveying mechanism and a rotatable rotating seat, and using the rotation of the rotating seat to bend the sheet material. Moreover, due to the linkage relationship between the friction wheel and the transmission wheel, the transmission wheel drives the conveying mechanism to rotate synchronously during the bending process, so that the part of the conveying mechanism in contact with the sheet material and the sheet material always move synchronously, thereby achieving traceless bending, reducing the risk of scratches and wear on the surface of the sheet material, and improving the bending effect of the metal sheet material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an overall structural schematic diagram of the traceless bending die;

[0019] Figure 2 is a partial structural schematic diagram of the traceless bending die;

[0020] Figure 3 is Figure 2 an enlarged structural view of region A in

[0021] Figure 4 the front view of a traceless bending die;

[0022] Figure 5 the top view of a traceless bending die;

[0023] Figure 6 is a sectional view taken along the Figure 5 section line B - B in

[0024] Figure 7 is Figure 6 an enlarged structural view of region C in

[0025] Figure 8 the structural schematic diagram of the traceless bending die when in the bending working state.

[0026] Among them:

[0027] 01 - sheet metal; 100 - base; 110 - screw; 111 - first external thread; 112 - second external thread; 120 - rotating handle; 200 - support seat; 210 - friction plate; 220 - tension spring; 300 - rotating seat; 310 - fixed support plate; 311 - oil groove; 312 - moving plate; 313 - through hole; 320 - conveying mechanism; 321 - driving wheel; 322 - idler wheel; 323 - tooth; 330 - friction wheel; 331 - tooth; 340 - housing; 341 - circulation pipeline; 342 - top block; 343 - compression spring; 344 - adapter; 350 - transmission gear; 400 - punch; 410 - first component; 420 - second component; 500 - support plate; 510 - support spring. Specific embodiments

[0028] The present invention will be further clarified below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, various equivalent modifications made by those skilled in the art to the present invention fall within the scope defined by the appended claims of this application.

[0029] Embodiment 1:

[0030] As Figure 1 shown, this embodiment provides a traceless bending die for metal sheet metal, including a base 100, two support seats 200 oppositely arranged on the base 100, two rotating seats 300 respectively rotatably arranged on the two support seats 200, a fixed support plate 310 arranged on the top of the rotating seat 300, a conveying mechanism 320 sleeved on the fixed support plate 310, and a punch 400.

[0031] As Figures 1 to 4 shown, a transmission wheel 321 is provided at one end of the transmission mechanism 320; the punch 400 is arranged above the transmission mechanism 320 and is located at the middle position between two transmission mechanisms 320. The punch 400 bends the sheet 01 by moving downward along the vertical direction and pushing the sheet 01; the contact surface between the rotating seat 300 and the supporting seat 200 is an arc surface to guide the rotation of the rotating seat 300; a tension spring 220 is arranged on the side of the supporting seat 200. One end of the tension spring 220 is connected to the base 100, and the other end is connected to the side of the rotating seat 300; the end of the fixed support plate 310 is bent downward and fixedly connected to the side wall of the rotating seat 300; the transmission mechanism 320 is sleeved on the fixed support plate 310, and a tension wheel 322 is provided at the other end of the transmission mechanism 320.

[0032] In this embodiment, a friction wheel 330 is arranged on the side wall of the rotating seat 300, and a friction plate 210 is arranged on the side wall of the supporting seat 200. The friction plate 210 has an arc surface adapted to the rotation arc of the rotating seat 300, and the friction wheel 330 abuts against this arc surface;

[0033] As Figure 3 shown, a transmission gear 350 is arranged between the friction wheel 330 and the transmission wheel 321. The friction wheel 330 is provided with teeth 331. The friction wheel 330 meshes with the transmission gear 350 through the teeth 331, and the transmission gear 350 meshes with the transmission wheel 321; teeth 323 are arranged on the inner side of the transmission mechanism 320 facing the fixed support plate 310 and mesh with the transmission wheel 321, improving the running stability of the transmission mechanism 320.

[0034] In this embodiment, the transmission wheel 321 is arranged at one end of the transmission mechanism 320 close to the punch 400; correspondingly, the friction wheel 330 is arranged at one end of the rotating seat 300 close to the punch 400. While facilitating driving, it ensures that when the rotating seat 300 rotates, the friction wheel 330 has sufficient rotating space, improving the structural rationality. Among them, the friction between the friction wheel 330 and the friction plate 210 is less than the friction between the transmission mechanism 320 and the sheet 01, so as to ensure that during the process of the friction wheel 330 driving the transmission wheel 321 to rotate, when the rotation speed of the friction wheel 330 and the rotation speed of the rotating seat 300 do not match, slipping occurs between the friction wheel 330 and the friction plate 210, while the transmission mechanism 320 and the sheet 01 always move synchronously.

[0035] In this embodiment, the transmission mechanism 320 can be configured as a conveyor chain, which has a high load-bearing capacity and good stability. The transmission mechanism 320 can be configured as a conveyor belt, preferably made of rubber material, which has a large friction coefficient and can better maintain synchronous movement with the sheet 01.

[0036] Referring to Figure 5, a plurality of oil grooves 311 arranged side by side are formed on the surface of the fixed support plate 310, and lubricating oil is filled in the oil grooves 311. A movable plate 312 that can move in the vertical direction is arranged at the notch of the oil groove 311, and the top surface of the movable plate 312 abuts against the tooth 323. A plurality of through holes 313 are arranged on the movable plate 312. When the movable plate 312 moves downward under the pressing of the tooth 323, the lubricating oil in the oil groove 311 flows to the top surface of the movable plate 312 through the plurality of through holes 313.

[0037] By providing the oil groove 311 and the movable plate 312, using the extrusion force of the sheet 01 on the conveying mechanism 320 during the bending process, the movable plate 312 moves downward, thereby forcing the lubricating oil in the oil groove 311 to flow to the top surface of the movable plate 312 through the through holes 313, and then lubricating the top surface of the movable plate 312 and the tooth 323 inside the conveying mechanism 320, reducing the friction between the tooth 323 and the movable plate 312, reducing the wear risk of the tooth 323 and the movable plate 312, making the conveying plate chain move more smoothly, and improving the service life.

[0038] In this embodiment, by providing a plurality of juxtaposed oil grooves 311 and corresponding movable plates 312 on the surface of the fixed support plate 310, when the mold bends sheets 01 of different widths, only the movable plate 312 and the conveying mechanism 320 pressed by the sheet 01 are lubricated, thereby avoiding over-lubrication, reducing production costs, and increasing the applicable range of the mold.

[0039] As Figure 6 shown, an oil inlet assembly C is provided at the bottom of the fixed support plate 310 to control the amount of lubricating oil in the oil groove 311, thereby ensuring the lubrication effect between the movable plate 312 and the tooth 323 while preventing excessive lubricating oil from escaping everywhere and affecting the production quality, and reducing the production cost at the same time.

[0040] As Figure 7 shown, the oil inlet assembly C includes a housing 340, a top block 342, and a compression spring 343. The housing 340 is arranged at the bottom end of the fixed support plate 310, and a flow pipeline 341 communicating with the oil groove 311 is formed therein. One end of the flow pipeline 341 close to the oil groove 311 is conical and gradually expands from the end close to the oil groove 311 to the other end. The top block 342 is movably arranged in the flow pipeline 341, and the shape of the top block 342 is adapted to the flow pipeline 341; the top end of the top block 342 extends out of the housing 340 and abuts against the bottom surface of the movable plate 312. The compression spring 343 is arranged in the flow pipeline 341, one end abuts against the bottom end of the top block 342, and the other end abuts against the housing 340.

[0041] In this embodiment, the top end of the top block 342 abuts against the bottom surface of the moving plate 312. During the bending process of the sheet 01, the moving plate 312 is pressed and moves downward, thereby pushing the top block 342 downward, creating a gap between the top block 342 and the housing 340, and then connecting the oil groove 311 and the flow pipeline 341, enabling the lubricating oil to flow smoothly into the oil groove 311. After the sheet 01 is bent, the pressing force on the moving plate 312 is released. Under the elastic force of the compression spring 343, the top block 342 moves upward and drives the moving plate 312 to reset. The top block 342 re-abuts against the housing 340, thus blocking the oil groove 311 and the flow pipeline 341. A union 344 can also be provided at the bottom of the housing 340 for connecting the pipeline of an external oil pump.

[0042] In this embodiment, by providing the top block 342 and the compression spring 343, and using the movement of the moving plate 312 to push the top block 342, the automatic opening and closing of the flow pipeline 341 is realized. The structure is simple and reliable, and the production cost is low. When the top block 342 abuts against the housing 340 to block the flow pipeline 341, its top end is flush with the bottom of the oil groove 311. A trigger rod corresponding to the top block 342 can be provided on the bottom surface of the moving plate 312, and the trigger rod abuts against the top block 342.

[0043] As Figure 5 and Figure 6 shown, a screw rod 110 is provided on the base 100, and a first external thread 111 and a second external thread 112 are formed on the screw rod 110. The first external thread 111 and the second external thread 112 have opposite helix directions, and the first external thread 111 and the second external thread 112 respectively pass through a support seat 200. Internal threads adapted to the first external thread 111 and the second external thread 112 are respectively formed on the two support seats 200. The end of the screw rod 110 is connected with a rotating handle 120 for controlling the rotation of the screw rod 110 to make the two support seats 200 approach or move away from each other. By adjusting the horizontal distance between the two support seats 200, the mold can bend sheets of different thicknesses 01, improving the practicability of the mold. Driving the rotation of the screw rod 110 by using the rotating handle 120 is not only simple and labor-saving in operation, but also has a simple and stable structure.

[0044] As Figure 8As shown in the figure, the punch 400 consists of two parts, namely the first component 410 and the second component 420, and the distance between the first component 410 and the second component 420 is adjustable, so that the distance between the first component 410 and the second component 420 can be adjusted accordingly with the distance between the two support seats 200. When the first component 410 and the second component 420 are in close contact with each other, pressing down the first component 410 and the second component 420 can bend an angle on the sheet 01. When the two support seats 200 are far away from each other and the first component 410 and the second component 420 are far away from each other, pressing down the first component 410 and the second component 420 can bend two angles on the sheet 01 simultaneously. The flexible use of the first component 410, the second component 420 and the two support seats 200 increases the application range of the mold and improves the practicability of the mold.

[0045] The traceless bending die for metal further includes a pallet 500, and the pallet 500 is detachably mounted on the base 100. The pallet 500 is arranged between the two support seats 200 and is located below the punch 400. A support spring 510 is arranged between the pallet 500 and the base 100 for supporting the pallet 500.

[0046] In the solution of this embodiment, by providing the detachable pallet 500 and the support spring 510, when the first component 410 and the second component 420 are far away from each other, the pallet 500 is used to support the sheet 01 between the first component 410 and the second component 420, making it easier to bend the double angles of the sheet 01. At the same time, the surface between the two bent angles of the sheet 01 is made flatter, improving the flatness of the sheet 01 and the quality of the double-angle bending of the sheet 01.

[0047] Embodiment 2:

[0048] In this embodiment, the traceless bending die of Embodiment 1 is used for bending the sheet 01. Referring to Figures 1 to 8 , the specific process includes:

[0049] Before the sheet 01 starts to be bent, the distance between the two support seats 200 is first adjusted to be adapted to the thickness of the sheet 01. And the distance between the first component 410 and the second component 420 of the punch 400 is adjusted to be adapted to the number and position of the bending angles of the sheet 01.

[0050] The sheet 01 made of metal is placed on the two rotating seats 300 and abuts against the conveying mechanism 320 on the rotating seats 300. After the punch 400 moves down to contact the sheet 01, it clamps the sheet 01 together with the conveying mechanism 320. Then, the punch 400 continues to move down. While pressing against the sheet 01, it pushes the two rotating seats 300 to rotate.

[0051] The part of the rotating seat 300 close to the punch 400 is pressed by the transmission mechanism 320, causing the rotating seat 300 to rotate on the support seat 200. The part of the support seat 200 away from the punch 400 presses the sheet 01 through the transmission mechanism 320, causing the sheet 01 to be bent inward.

[0052] During the rotation of the rotating seat 300, the tension spring 220 is stretched. Under the pulling force of the tension spring 220 and the supporting action of the support seat 200, the transmission mechanism 320 on the rotating seat 300 is in close contact with the sheet 01. The sheet 01 is gradually bent under the pushing of the punch 400 and the clamping of the two rotating seats 300.

[0053] During the bending of the sheet 01, that is, when the rotating seat 300 rotates, it drives the friction wheel 330 to rotate on the arc surface of the friction plate 210. The rotation of the friction wheel 330 drives the transmission wheel 321 to rotate synchronously through the transmission gear 350. The transmission mechanism 320 rotates under the drive of the transmission wheel 321, so that the part of the transmission mechanism 320 in contact with the sheet 01 and the sheet 01 can always move synchronously, thus cleverly solving the problem that the sheet 01 will slip relative to the mold, and realizing seamless bending.

Claims

1. A seamless bending die for metal sheets, characterized in that: It includes a base, two support seats oppositely arranged on the base, two rotating seats rotatably arranged on the two support seats respectively, a fixed support plate arranged at the top of the rotating seat, a conveying mechanism arranged on the fixed support plate, and a punch for moving down and pushing the plate material. The conveying mechanism is used to support the plate material. A driving wheel is arranged at one end of the conveying mechanism, and a friction wheel is arranged on the side wall of the rotating seat. The friction wheel is matched with the driving wheel to drive the driving wheel to rotate synchronously. Teeth meshing with the driving wheel are arranged on the inner side of the conveying mechanism facing the fixed support plate. A plurality of oil grooves arranged side by side are formed on the surface of the fixed support plate, and lubricating oil is filled in the oil grooves. A moving plate that can move in the vertical direction is arranged at the notch of the oil groove, and the top surface of the moving plate abuts against the teeth. A plurality of through holes are arranged on the moving plate. An oil inlet assembly is arranged at the bottom of the fixed support plate for controlling the amount of lubricating oil in the oil groove. The oil inlet assembly includes a housing, a top block and a compression spring. The housing is arranged at the bottom end of the fixed support plate, and a flow pipeline communicating with the oil groove is formed inside it. One end of the flow pipeline close to the oil groove is conical and gradually expands from the end close to the oil groove to the other end. The top block is movably arranged in the flow pipeline, and the shape of the top block is adapted to the flow pipeline. The top end of the top block extends out of the housing and abuts against the bottom surface of the moving plate. The compression spring is arranged in the flow pipeline, with one end abutting against the bottom end of the top block and the other end abutting against the housing.

2. The traceless bending die for metal sheets according to claim 1, wherein Friction plates are arranged on the side walls of the support seats. The friction plates have arc-shaped surfaces adapted to the rotation arcs of the rotating seats, and the friction wheels abut against the arc-shaped surfaces.

3. The traceless bending die for metal sheets according to claim 2, wherein, A transmission gear is arranged between the friction wheel and the driving wheel. Teeth are arranged on the friction wheel, and the friction wheel meshes with the transmission gear through the teeth. The transmission gear meshes with the driving wheel.

4. The seamless bending die for metal sheets according to claim 1, characterized in that, A tension spring is arranged on the side of the support seat. One end of the tension spring is connected to the base, and the other end is connected to the side of the rotating seat.

5. The seamless bending die for metal sheets according to claim 1, wherein A screw rod is arranged on the base, and a first external thread and a second external thread are formed on the screw rod. The first external thread and the second external thread have opposite helix directions, and the first external thread and the second external thread respectively pass through a support seat. Internal threads adapted to the first external thread and the second external thread are respectively formed on the two support seats. A rotating handle is connected to the end of the screw rod for controlling the rotation of the screw rod to make the two support seats approach or move away from each other.

6. The traceless bending die for metal sheets according to claim 1, characterized in that, The punch includes a first component and a second component arranged oppositely, and the distance between the first component and the second component is adjustable.

7. An edgeless bending die for metal sheets according to claim 1, characterized in that, It also includes a support plate, which is detachably installed on the base. The support plate is arranged between the two support seats and below the punch. A support spring is arranged between the support plate and the base for supporting the support plate.

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