Bending device and working method

Abstract

The invention discloses a bending device and a working method, and provides a simple bending device, so that the bending task at any angle can be completed without replacing a stamping part, the rebound problem of a workpiece after being bent is solved, the workpiece is bent to the required bending angle at one time, perfect bending at any angle can be realized, and the working efficiency is improved. The universality of the positioning device is improved; according to the technical scheme, the bending device comprises a bending punch, a bending lower die and a material belt. The bending punch is hinged to the punch connecting base, the punch connecting base is fixedly arranged on the upper die plate, and the punch part is provided with a bending inclined face and a guiding inclined face. A material belt is arranged below the bending punch, and workpieces are arranged on the material belt at intervals. A bending lower die and a bending adjusting block are arranged below the material belt, and the bending lower die is arranged on one side of the bending inclined face. The bending adjusting block is arranged on one side of the guide inclined face, and a guide face is arranged on the side, close to the lower bending die, of the upper end of the bending adjusting block.

Description

Technical Field

[0001] The invention belongs to the field of stamping technology, and in particular relates to a bending device and a working method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Bending is a common processing requirement during workpiece processing. Metal sheets or metal parts are plastically deformed by stamping to form the required bending angle. The bending method of the bending device in the prior art is divided into two processes for processing. The product is first bent by longitudinal stamping, and then the bent part is further bent by transverse extrusion to make the product form the required bending angle. The bending device has a complex structure and cumbersome bending operation steps.

[0004] In addition, the prior art CN112238167A also uses a fixed-angle mold for stamping and bending, and the right-angle block is located in the middle position above the base. The right-angle block is fixedly connected to the base through two vertical rods, and two hydraulic cylinders are respectively located on the left and right sides of the upper surface of the base. The workpiece is bent through the right-angle block. Although the prior art can perform right-angle bending, its bending angle is a fixed angle, and it is impossible to process workpieces with different bending angle requirements. If workpieces with different bending angles are processed, the stamping components of the bending device need to be disassembled and replaced, resulting in low work efficiency and poor versatility of the bending device. Summary of the invention

[0005] In view of the above problems, the present invention provides a bending device and a working method, and provides a simple bending device. By adjusting the height of the bending adjustment block, bending at any angle is achieved in combination with the cooperation of the guide surface and the guide inclined surface, and the bending task at any angle can be completed without replacing the stamping parts. The bending angle of the workpiece is increased by setting the bending inclined surface to solve the springback problem of the workpiece after bending, and the workpiece can be bent to the required bending angle at one time, and perfect bending at any angle can be achieved, thereby improving the versatility of the positioning device.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, the present invention provides a bending device, including a bending punch, a punch connecting seat, a bending lower die, a bending adjustment block and a material strip;

[0008] The bending punch comprises a punch head, a main body and a mounting part, wherein the mounting part is hinged to the punch connecting seat, the punch connecting seat is fixedly arranged on the upper template, the punch head is provided with a bending inclined surface and a guiding inclined surface, and the bending inclined surface and the guiding inclined surface are parallel to each other; a material belt is provided below the bending punch, and workpieces are arranged on the material belt at intervals; the bending lower die and the bending adjustment block are provided below the material belt, and the bending lower die is arranged on one side of the bending inclined surface;

[0009] The bending adjustment block is arranged on one side of the guiding inclined surface, and the lower part of the bending adjustment block is detachably connected to the base of the hydraulic press, and a guiding surface is provided on one side of the upper end of the bending adjustment block close to the bending lower die.

[0010] Furthermore, the mounting seat of the bending punch is connected to the punch connecting seat via a pin shaft; the punch connecting seat is provided with an arc-shaped groove, and the size of the arc-shaped groove of the punch connecting seat is larger than the size of the mounting portion of the bending punch.

[0011] Furthermore, the end of the mounting portion of the bending punch is an arc-shaped structure and is adapted to the arc-shaped groove of the punch connecting seat.

[0012] Furthermore, one end of the main body of the bending punch is a mounting portion, and the other end is a punch portion, and the bending slope of the punch portion forms an obtuse angle with the side surface of the main body.

[0013] Furthermore, a rounded corner is provided between the bending slope of the punch portion and the end surface of the punch portion.

[0014] Furthermore, a cushion block can be arranged between the bending adjustment block and the hydraulic press base.

[0015] Furthermore, the bending lower die and the hydraulic press base are detachably connected.

[0016] Furthermore, a groove having the same shape as the workpiece to be processed is provided on one side of the bending lower die close to the bending adjustment block.

[0017] Furthermore, the material strip and the workpiece are detachably connected.

[0018] In a second aspect, the present invention further provides a working method of a bending device, comprising the following steps:

[0019] S1. Bending angle adjustment: when the bending angle needs to be increased, the bending adjustment block is removed from the hydraulic press base, the number of the pads is increased, the height of the bending adjustment block is increased, at this time the descending distance of the bending punch remains unchanged, the rotation angle of the bending punch is increased, so that the bending angle of the workpiece becomes larger; when the bending angle needs to be reduced, the bending adjustment block is removed from the pad, the number of the pads is reduced and the height of the bending adjustment block is adjusted, the height of the bending adjustment block is reduced, the rotation angle of the bending punch is reduced, so that the bending angle of the workpiece becomes smaller;

[0020] S2. Bending process: After the bending angle is adjusted, the material belt drives the workpiece to be bent into between the bending punch and the bending lower die. When the workpiece to be bent moves to just below the bending punch, the hydraulic press drives the bending punch down, and the workpiece to be bent completes the bending.

[0021] Compared with the prior art, the present invention has the following advantages and positive effects:

[0022] The beneficial effects of the precise positioning device of the present invention are as follows:

[0023] The hinged design of the bending punch and the punch connecting seat of the present invention can realize a certain angle of rotation and can adapt to different bending angle requirements. The guide surface of the bending adjustment block cooperates with the guide inclined surface of the bending punch. The bending angle can be adjusted by adjusting the height of the bending adjustment block. The operation is convenient and no secondary adjustment is required for bending at the same angle. The problem of bending rebound caused by the influence of rigidity during the workpiece processing is solved. When adjusting the bending angle, it is slightly larger than the required angle to ensure that the angle of the workpiece after bending is exactly the required angle, achieving perfect bending and improving processing accuracy. The arc groove is adapted to the end of the mounting portion and abuts against it to transfer the load, and the connection is stable and reliable.

[0024] A rounded corner is arranged between the bending inclined surface and the end surface of the punch head of the present invention to prevent damage to the punched parts and improve the processing quality; in addition, the height of the bending adjustment block can be adjusted by increasing or decreasing the number of pads to adjust the height of the bending adjustment block, thereby adjusting the bending angle; the bending lower die is detachably connected to the hydraulic press base, and different dies can be replaced according to different workpiece shapes, thereby improving the versatility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 This is the overall structural diagram of the bending device of the present invention;

[0027] Figure 2 It is a cross-sectional view of the bending punch and the punch connecting seat of the present invention.

[0028] In the figure: 1. bending punch; 2. punch connecting seat; 21. mounting part; 22. main body; 23. punch head; 231. bending slope; 232. guide slope; 3. material strip; 4. bending adjustment block; 5. cushion block; 6. bending lower die; 7. workpiece; 8. pin. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0031] This embodiment discloses a bending device, such as Figure 1-Figure 2 As shown, it includes a bending punch 1, a punch connecting seat 2, a bending lower die 6, a bending adjustment block 4 and a material strip 3; the bending punch 1 includes a punch head 23, a main body 22 and a mounting portion 21, the mounting portion 21 is hinged to the punch connecting seat 2, the punch connecting seat 2 is fixedly arranged on the upper template, the punch head 23 is provided with a bending slope 231 and a guide slope 232, and the bending slope 231 and the guide slope 232 are parallel to each other; a material strip 3 is arranged below the bending punch 1, and a stamped part is fixed on the material strip 3; the bending lower die 6 and the bending adjustment block 4 are arranged below the material strip 3, the bending lower die 6 is arranged on one side of the bending slope 231, and the bending adjustment block 4 is arranged on one side of the guide slope 232.

[0032] The mounting portion 21 of the bending punch 1 is hinged to the punch connecting seat 2, and the punch connecting seat 2 is provided with an arc-shaped groove. The size of the arc-shaped groove is larger than the size of the mounting portion 21 of the bending punch 1, so that the bending punch 1 can rotate a certain angle in the punch connecting seat 2, and the end of the mounting portion 21 of the bending punch 1 is an arc-shaped structure, which is adapted to the arc-shaped groove; the mounting seat of the bending punch 1 is connected to the punch connecting seat 2 through a pin shaft 8, and the pin shaft 8 serves as the rotating axis of the bending punch 1 during punching, and the arc-shaped groove abuts against the end of the mounting portion 21 of the bending punch 1 to transfer the punching load.

[0033] One end of the main body 22 of the bending punch 1 is the mounting portion 21, and the other end is the punch portion 23. The bending slope 231 of the punch portion 23 forms an obtuse angle with the side surface of the main body 22; a rounded corner is provided between the bending slope 231 of the punch portion 23 and the end surface of the punch portion 23 to prevent the bending punch 1 from damaging the punched workpiece during operation.

[0034] A guide surface is provided on one side of the upper end of the bending adjustment block 4 close to the bending lower die 6, and the guide surface cooperates with the guide inclined surface 232. When the bending punch 1 moves downward, its punch first touches the guide surface and then continues to descend. The punch rotates around the pin shaft 8 under the action of the guide surface; the lower part of the bending adjustment block 4 is detachably connected to the base of the hydraulic press, and a pad 5 can be set between the bending adjustment block 4 and the base of the hydraulic press. The height of the bending adjustment block 4 can be adjusted by increasing or decreasing the number of the pads 5, which further affects the bending angle. When the number of the pads 5 is more, the height of the bending adjustment block 4 is higher. At this time, the descending distance of the bending punch 1 remains unchanged, which leads to an increase in the rotation angle of the bending punch 1, so that the bending angle of the workpiece 7 becomes larger; when the pads 5 are reduced, the bending angle of the workpiece 7 decreases; the bending adjustment block 4 only needs to be adjusted during the first bending, and the bending at the same angle does not require secondary adjustment.

[0035] The bending lower die 6 is connected to the base of the hydraulic press, and the bending lower die 6 and the base of the hydraulic press are detachably connected to facilitate replacement of different bending lower dies 6. A groove with the same shape as the workpiece 7 to be processed is provided on the side of the bending lower die 6 close to the bending adjustment block 4. The bending lower die 6 can replace different molds according to the shapes of different workpieces 7.

[0036] Working process:

[0037] Bending angle adjustment process: when the bending angle needs to be increased, the bending adjustment block is removed from the base of the hydraulic press, and the height of the bending adjustment block 4 is adjusted by increasing the number of the pad blocks 5. When the number of the pad blocks 5 is greater, the height of the bending adjustment block 4 is higher, and at the same time, the descending distance of the bending punch 1 remains unchanged, and the longer the moving distance of the bending punch 1 on the guide surface, the closer it is to the bending lower die 6, which causes the rotation angle of the bending punch 1 to increase, so that the bending angle of the workpiece 7 becomes larger; when the bending angle needs to be reduced, the bending adjustment block is removed from the pad block 5, and the height of the bending adjustment block 4 is adjusted by reducing the number of the pad blocks 5. When the number of the pad blocks 5 is less, the height of the bending adjustment block 4 is lower, and at the same time, the descending distance of the bending punch 1 remains unchanged, and the moving distance of the bending punch 1 on the guide surface is shorter and farther away from the bending lower die 6, which causes the rotation angle of the bending punch 1 to decrease, so that the bending angle of the workpiece 7 becomes smaller.

[0038] Bending process: After the bending angle is adjusted, the material strip 3 drives the bent workpiece 7 to enter between the bending punch 1 and the bending lower die 6. When the bent workpiece 7 moves to just below the bending punch 1, the hydraulic press drives the bending punch 1 to descend, and the bent workpiece 7 completes the bending. Since the workpiece 7 has a certain rigidity, the workpiece 7 will have a certain rebound after the bending is completed. Therefore, when the bending angle is adjusted, the bending angle is slightly larger than the required bending angle, so that the bending angle of the bent workpiece 7 is exactly the required angle.

[0039] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A bending device, characterized in that: It includes a bending punch, a punch connecting seat, a bending lower die, a bending adjustment block and a material strip; The bending punch comprises a punch head, a main body and a mounting part, wherein the mounting part is hinged to the punch connecting seat, the punch connecting seat is fixedly arranged on the upper template, the punch head is provided with a bending inclined surface and a guiding inclined surface, and the bending inclined surface and the guiding inclined surface are parallel to each other; a material belt is provided below the bending punch, and workpieces are arranged on the material belt at intervals; the bending lower die and the bending adjustment block are provided below the material belt, and the bending lower die is arranged on one side of the bending inclined surface; The bending adjustment block is arranged on one side of the guiding inclined surface, and the lower part of the bending adjustment block is detachably connected to the base of the hydraulic press, and a guiding surface is provided on one side of the upper end of the bending adjustment block close to the bending lower die.

2. A bending device according to claim 1, characterized in that: The mounting seat of the bending punch is connected to the punch connecting seat through a pin shaft; the punch connecting seat is provided with an arc-shaped groove, and the size of the arc-shaped groove of the punch connecting seat is larger than the size of the mounting portion of the bending punch.

3. A bending device according to claim 2, characterized in that: The end of the mounting portion of the bending punch is an arc-shaped structure and is adapted to the arc-shaped groove of the punch connecting seat.

4. A bending device according to claim 1, characterized in that: One end of the main body of the bending punch is a mounting portion, and the other end is a punch portion, and the bending slope of the punch portion forms an obtuse angle with the side surface of the main body.

5. A bending device according to claim 4, characterized in that: A rounded corner is arranged between the bending inclined surface of the punch portion and the end surface of the punch portion.

6. A bending device according to claim 1, characterized in that: A cushion block can be arranged between the bending adjustment block and the hydraulic press base.

7. A bending device according to claim 1, characterized in that: The bending lower die and the hydraulic press base are detachably connected.

8. A bending device according to claim 7, characterized in that: A groove having the same shape as the workpiece to be processed is arranged on one side of the bending lower die close to the bending adjustment block.

9. A bending device according to claim 1, characterized in that: The material strip and the workpiece are detachably connected.

10. A working method of a bending device according to any one of claims 2 to 9, characterized in that: The following steps are involved: S1. Bending angle adjustment: when the bending angle needs to be increased, the bending adjustment block is removed from the hydraulic press base, the number of the pads is increased, the height of the bending adjustment block is increased, at this time the descending distance of the bending punch remains unchanged, the rotation angle of the bending punch is increased, so that the bending angle of the workpiece becomes larger; when the bending angle needs to be reduced, the bending adjustment block is removed from the pad, the number of the pads is reduced and the height of the bending adjustment block is adjusted, the height of the bending adjustment block is reduced, the rotation angle of the bending punch is reduced, so that the bending angle of the workpiece becomes smaller; S2. Bending process: After the bending angle is adjusted, the material belt drives the workpiece to be bent into between the bending punch and the bending lower die. When the workpiece to be bent moves to just below the bending punch, the hydraulic press drives the bending punch down, and the workpiece to be bent completes the bending.

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