A bending tool

Abstract

The present application relates to the technical field of bending tooling, and particularly relates to a bending tooling, which comprises a workbench and a bending workpiece, the end of the workbench is provided with a plurality of supporting legs, the lateral wall of the workbench is provided with a rotating seat, the end of the rotating seat is provided with a bending die for fixing the bending workpiece, the workbench is provided with an auxiliary clamp for bending the bending workpiece, the rotating seat is provided with a main clamp for fixing the bending workpiece, the workbench is provided with a dovetail block for fixing the auxiliary clamp, and the rotating seat is provided with a trapezoidal block for fixing the main clamp. The auxiliary clamp and the main clamp are arranged, so that the bending workpiece is supported by the auxiliary clamp on the side plate part and the main clamp on the front end of the main plate before bending, thereby forming a stable and reliable fixed state, the dovetail block and the dovetail groove are matched to realize the positioning and self-locking connection between the auxiliary clamp and the first moving seat, and the trapezoidal block and the trapezoidal groove are wedge-shaped matched to realize the guiding correction and connection between the main clamp and the second moving seat.

Description

Technical Field

[0001] This invention relates to the field of bending fixture technology, and more particularly to a bending fixture. Background Technology

[0002] Sheet metal bending is an important part of metal forming processes and is widely used in the manufacture of electrical cabinets, chassis shells, ventilation ducts and various frame structures. As industrial products develop towards modularization and integration, complex sheet metal workpieces with multi-faceted bending characteristics are increasing.

[0003] Currently, for multi-side plate bending workpieces, the industry mainly uses traditional bending machines with manual assistance or simple molds for processing. Existing bending equipment mostly adopts upper die pressing or linear reciprocating bending methods. Traditional bending molds are usually of general-purpose structure, which makes it difficult to effectively limit and guide the circumferential direction of complex workpieces with multiple side plates. During the bending process, there is a lack of reliable fixing effect between the side plates of the workpiece, which can easily cause movement or twisting deformation, resulting in bending angle deviation. Meanwhile, traditional bending equipment mostly adopts rigid connection or fixed installation, lacking quick adaptation and precise positioning structure. Under the action of bending force, relative slippage between the workpiece and the mold is easy to occur, affecting bending accuracy and posing safety hazards. This leads to cumbersome mold replacement, long operation time, and often requires multiple clamping and multiple processes to complete the bending of complex workpieces. The processing efficiency is low, the labor intensity is high, and multiple clamping can easily introduce cumulative errors, making it difficult to ensure the consistency of bending angle of each side plate. There is also a lack of effective positioning and guiding cooperation between the bending mold and the fixture. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of workpiece movement and deformation, poor bending accuracy, and cumbersome mold and fixture replacement in the prior art during bending, and to propose a bending fixture.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A bending fixture includes a worktable and a workpiece to be bent. The worktable has multiple legs at its end and a rotating seat on its side wall. The rotating seat has a bending die at its end for fixing the workpiece. The worktable has an auxiliary clamp for bending the workpiece. The rotating seat has a main clamp for fixing the workpiece. The worktable has a dovetail block for fixing the auxiliary clamp. The rotating seat has a trapezoidal block for fixing the main clamp.

[0006] Preferably, the bottom of the workbench is provided with a first servo motor, the output end of the first servo motor is connected to the end of the rotating seat, and the bending die is installed at the end of the rotating seat.

[0007] Preferably, the bending die has linearly formed limiting grooves and guide grooves, both of which are adapted to the bending workpiece.

[0008] Preferably, the rotating seat has a sliding groove, the inner wall of the sliding groove has a second movable seat, the inner wall of the sliding groove has symmetrically provided inclined surfaces, and the inner wall of the sliding groove has a stop rod.

[0009] Preferably, the rotating seat has a fixed plate on its side wall, and a threaded rod is inserted into the side wall of the fixed plate. The second moving seat has a second servo motor on its side wall, and the output end of the second servo motor is connected to the threaded rod.

[0010] Preferably, the side wall of the fixed plate is provided with a threaded bushing, the threaded rod passes through the side wall of the fixed plate, the threaded bushing and the threaded rod are threadedly connected, the trapezoidal block is installed on the side wall of the second movable seat, and the side wall of the main clamp is provided with a trapezoidal groove, the trapezoidal groove and the trapezoidal block are mutually adapted.

[0011] Preferably, the workbench is provided with symmetrical slide rails at its ends, the slide rails are provided with sliders on their outer sidewalls, the sliders are provided with first movable seats at their ends, and the auxiliary clamps are installed on the sidewalls of the first movable seats.

[0012] Preferably, the first movable seat sidewall is provided with a dovetail block, and the auxiliary clamp sidewall is provided with a dovetail groove, the dovetail groove and the dovetail block are adapted to each other.

[0013] Preferably, the auxiliary clamp sidewall is provided with an auxiliary clamp fixing groove, and the auxiliary clamp fixing groove is compatible with the bent workpiece.

[0014] Preferably, the bending workpiece is composed of a main board and multiple side plates one and multiple side plates two. The multiple side plates one are symmetrically arranged on both sides of the main board, and multiple side plates two are arranged on the same side at both ends of the main board.

[0015] Compared with the prior art, the present invention has the following advantages: 1. This invention, by setting up auxiliary clamps and main clamps, allows the side plate portion of the bent workpiece to be supported by the auxiliary clamp and the front end of the main plate to be pressed by the main clamp before bending, forming a stable and reliable fixed state. The cooperation between the dovetail block and the dovetail groove realizes the positioning and self-locking connection between the auxiliary clamp and the first moving seat. The wedge-shaped cooperation between the trapezoidal block and the trapezoidal groove realizes the guiding correction and connection between the main clamp and the second moving seat, which facilitates the operator to disassemble and replace the auxiliary clamp and the main clamp, reducing the operator's labor intensity and changeover preparation time.

[0016] 2. This invention achieves rotary bending by setting a rotating seat, which allows the bending die to rotate at a controllable angle around the side wall of the worktable under the drive of the first servo motor. The side plate undergoes directional plastic deformation under the limiting support of the auxiliary clamp, thus realizing rotary bending processing. This ensures that each side plate maintains a uniform stress distribution during the bending process, reduces torsional deformation caused by uneven force on one side, ensures that the bending angle of each side plate is accurate and consistent, reduces the cumulative error and efficiency loss caused by multiple clamping, and improves processing efficiency and finished product qualification rate. Attached Figure Description

[0017] Figure 1 This is an isometric view of a bending fixture proposed in this invention; Figure 2 A partial schematic diagram (A) shows a bending fixture proposed in this invention. Figure 3 This is a left and right isometric view of a bending fixture proposed in this invention; Figure 4 This is a front and rear isometric view of a bending fixture proposed in this invention; Figure 5 This is a sectional side view of the workbench of a bending fixture proposed in this invention; Figure 6 This is a partial schematic diagram (B) of a bending fixture proposed in this invention; Figure 7 This is a schematic diagram of a bending workpiece according to a bending fixture proposed in this invention; Figure 8 This is a schematic diagram of the bending workpiece state of a bending fixture proposed in this invention.

[0018] In the diagram: 1. Workbench; 2. Support leg; 3. First servo motor; 4. Bending die; 5. First moving seat; 6. Second moving seat; 7. Rotating seat; 8. Inclined surface; 9. Support rod; 10. Main clamp; 11. Trapezoidal groove; 12. Trapezoidal block; 13. Threaded rod; 14. Second servo motor; 15. Threaded bushing; 16. Slide rail; 17. Slider; 18. Dovetail groove; 19. Dovetail block; 20. Auxiliary clamp; 21. Auxiliary clamp fixing groove; 22. Bending workpiece. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figures 1-8A bending fixture includes a worktable 1 and a bending workpiece 22. The worktable 1 has multiple support legs 2 at its end. A rotating seat 7 is rotatably mounted on the side wall of the worktable 1. A first servo motor 3 is fixedly mounted on the bottom of the worktable 1. The output end of the first servo motor 3 is fixedly connected to the end of the rotating seat 7. A bending die 4 is mounted on the end of the rotating seat 7. With this configuration, the first servo motor 3 can control the rotation angle of the rotating seat 7, thereby driving the bending die 4 and the front end of the main plate of the bending workpiece 22 fixed thereon to achieve rotational bending. Rotational bending ensures that each side plate maintains a uniform stress distribution during the bending process, reduces torsional deformation caused by uneven force on one side, ensures controllable rotation angle, and improves the consistency of bending angle.

[0021] The rotating seat 7 has a bending die 4 at its end for fixing the bending workpiece 22. The bending die 4 has a limit groove and a guide groove linearly formed on it. The limit groove and the guide groove are adapted to each other with the bending workpiece 22. With this setting, the limit groove limits the side plate of the bending workpiece 22 in the circumferential direction to prevent the side plate from moving axially or shifting during the bending process. It should be noted that the guide groove is adapted to the outer contour of the second side plate, providing deformation guidance for the second side plate during the bending process, so that each side plate undergoes plastic deformation along a predetermined trajectory, ensuring that the bending line is straight and the bending angle is accurate, thereby improving the versatility of the equipment and processing efficiency.

[0022] The rotating seat 7 is provided with a sliding groove, and the second moving seat 6 is slidably disposed on the inner side wall of the sliding groove. The inner side wall of the sliding groove is symmetrically provided with inclined surfaces 8, and the push rod 9 is rotatably disposed on the inner side wall of the sliding groove. With this arrangement, the inclined surfaces 8 provide precise guidance for the linear movement of the second moving seat 6, ensuring that the second moving seat 6 maintains a stable movement trajectory during the sliding process, and preventing the main clamp 10 from shifting when it approaches or moves away from the bending die 4. The stop bar 9 serves as a mechanical limiter, restricting the extreme stroke position of the second moving seat 6, preventing the second servo motor 14 from driving the threaded rod 13 to rotate excessively and causing the second moving seat 6 to exceed the safe stroke range, protecting the threaded transmission mechanism from overload damage, ensuring that the clamping force between the main clamp 10 and the bending die 4 is within a reasonable range, and avoiding damage to the workpiece surface due to excessive clamping force or slippage of the workpiece due to insufficient clamping force. It should be noted that this configuration allows the second moving seat 9 to be lifted under the action of the abutment rod 9, ensuring that the main clamp 10 fits against the side of bending workpieces of different specifications, achieving adaptive clamping and fixing, and preventing the workpiece from shifting or deviating during processing.

[0023] The rotating seat 7 has a fixed plate on its side wall, and the threaded rod 13 is rotatably inserted into the side wall of the fixed plate. The second servo motor 14 is fixedly installed on the side wall of the second moving seat 6. The output end of the second servo motor 14 is fixedly connected to the threaded rod 13. With this configuration, the second servo motor 14 drives the threaded rod 13 to rotate, converting the rotational motion into the linear reciprocating motion of the second moving seat 6, thereby achieving precise control of the main clamp 10 moving closer to or further away from the bending mold 4. Since the second servo motor 14 moves synchronously with the second moving seat 6, the cumulative error and transmission lag caused by the long-distance transmission chain are avoided, making the clamping action of the main clamp 10 respond quickly and position accurately. The clamping force is adjusted in real time according to the material and thickness of the workpiece to meet the processing needs of bending workpieces 22 of different specifications.

[0024] The workbench 1 is equipped with an auxiliary clamp 20 for bending the workpiece 22. The threaded bushing 15 is fixedly installed on the side wall of the fixed plate, and the threaded rod 13 passes through the side wall of the fixed plate. The threaded bushing 15 and the threaded rod 13 are threadedly connected. With this arrangement, the rotational motion of the threaded rod 13 is converted into the linear thrust of the second moving seat 6. The threaded transmission has a self-locking characteristic. After the second servo motor 14 stops running, the clamping position of the main clamp 10 remains unchanged, preventing the clamping force from weakening due to vibration or reaction force during the bending process.

[0025] The rotating seat 7 is provided with a main clamp 10 for fixing the bent workpiece 22. The trapezoidal block 12 is fixedly installed on the side wall of the second moving seat 6. The side wall of the main clamp 10 is provided with a trapezoidal groove 11. The trapezoidal groove 11 and the trapezoidal block 12 are adapted to each other. With this arrangement, the wedge-shaped fit structure of the trapezoidal block 12 and the trapezoidal groove 11 can automatically correct the relative position between the main clamp 10 and the bending die 4 by using the guiding effect of the trapezoidal inclined surface during the process of the second moving seat 6 pushing the main clamp 10 closer to the bending die 4, so as to ensure that the pressing surface of the main clamp 10 is parallel and in contact with the supporting surface of the bending die 4. It should be noted that the self-locking characteristic of the trapezoidal structure makes the connection between the main clamp 10 and the second moving seat 6 more stable when the main clamp 10 is subjected to bending reaction force, reducing the occurrence of relative slippage or loosening, and ensuring the reliability of the front end clamping of the main board during bending. The insertion and matching of the trapezoidal block 12 and the trapezoidal groove 11 facilitates the replacement of the main clamp 10. The main clamp 10 of the appropriate shape can be replaced according to different workpiece specifications, which improves the flexible processing capability of the equipment.

[0026] The slide rail 16 is symmetrically fixed at the end of the worktable 1, the slider 17 is slidably mounted on the outer wall of the slide rail 16, the first moving seat 5 is fixedly mounted at the end of the slider 17, and the auxiliary clamp 20 is mounted on the side wall of the first moving seat 5. With this arrangement, the slide rail 16 provides a linear guide for the first moving seat 5. The cooperation between the slider 17 and the slide rail 16 ensures that the auxiliary clamp 20 remains highly stable when approaching or moving away from the bending die 4, and avoids the bending workpiece 22 from twisting during clamping due to tilting or offset of the auxiliary clamp 20. This ensures that the bending angle of each side plate is consistent and improves the stability of forming complex multi-side plate workpieces.

[0027] The workbench 1 is provided with a dovetail block 19 for fixing the auxiliary clamp 20, the rotating seat 7 is provided with a trapezoidal block 12 for fixing the main clamp 10, the side wall of the first moving seat 5 is provided with a dovetail block 19, and the side wall of the auxiliary clamp 20 is provided with a dovetail groove 18. The dovetail groove 18 and the dovetail block 19 are mutually compatible. Through this arrangement, the wedge-shaped fit structure of the dovetail block 19 and the dovetail groove 18 provides positioning and connection between the auxiliary clamp 20 and the first moving seat 5. The guide slope of the dovetail structure can automatically guide the auxiliary clamp 20 into the correct position during the installation process, so as to realize the rapid positioning of the auxiliary clamp 20. It should be noted that the mechanical self-locking characteristic of the dovetail structure ensures that the auxiliary clamp 20 will not fall off the first moving seat 5 when subjected to bending reaction force, thus ensuring processing safety. The dovetail connection method facilitates the quick disassembly and replacement of the auxiliary clamp 20. Operators can replace the auxiliary clamp 20 with the corresponding auxiliary clamp fixing groove 21 shape according to the different shapes of the bent workpiece 22. The replacement can be completed without the aid of tools, which shortens the auxiliary preparation time and improves the equipment's changeover efficiency and flexible production capacity.

[0028] The bending workpiece 22 consists of a main board and multiple side plates 1 and multiple side plates 2. The multiple side plates 1 are symmetrically arranged on both sides of the main board, and multiple side plates 2 are arranged on the same side at both ends of the main board. With this arrangement, the main board acts as the load-bearing body, and its front end is clamped and fixed by the main clamp 10 and the bending die 4 and rotates with the rotating seat 7. The side plates 1 arranged symmetrically on both sides are bent towards the main board under the constraint of the upper limit groove of the bending die 4. The side plates 2 on the same side at both ends are deformed synchronously under the guidance of the guide groove. This allows multiple side plates to be formed simultaneously in one rotation bending operation, avoiding the cumulative error and low efficiency caused by traditional multiple clamping and step bending. It ensures the consistency of the bending angle of each side plate and the overall dimensional accuracy of the workpiece.

[0029] The functional principle of this invention can be explained through the following operational methods: The operator places the workpiece 22 to be bent into the auxiliary clamp fixing groove 21 of the auxiliary clamp 20. The auxiliary clamp fixing groove 21 is adapted to the shape of the workpiece 22, so that the workpiece 22 is initially positioned and stably supported on the auxiliary clamp 20. The first moving seat 5 moves along the slide rail 16 towards the rotating seat 7 under the push of the external drive device. The slider 17 slides smoothly along the outer wall of the slide rail 16, driving the first moving seat 5 and the auxiliary clamp 20 to move closer to the bending mold 4. During this process, the dovetail groove 18 on the side wall of the auxiliary clamp 20 and the dovetail block 19 on the side wall of the first moving seat 5 cooperate with each other to form a reliable guiding and positioning connection, ensuring that the auxiliary clamp 20 maintains the correct posture and horizontal height during the movement. When the auxiliary clamp 20 moves to fit against the bending die 4, the first and second side plates of the bent workpiece 22 are respectively embedded in the limiting groove and the guide groove on the bending die 4. The limiting groove circumferentially limits the side plates of the bent workpiece 22 to prevent axial movement during bending; the guide groove cooperates with the auxiliary clamp 20 to keep the relative horizontal height between the auxiliary clamp 20 and the bending die 4 constant, ensuring that the bent workpiece 22 is in the correct spatial position before bending, providing a precise positioning reference for subsequent bending operations; The second servo motor 14 starts and drives the threaded rod 13 to rotate. Since the threaded bushing 15 is threadedly connected to the threaded rod 13, the rotational motion of the threaded rod 13 is converted into linear movement of the threaded bushing 15 and the second moving seat 6. The second moving seat 6 moves towards the bending die 4 along the sliding groove on the rotating seat 7. The inclined surface 8 of the inner wall of the sliding groove provides guidance for the second moving seat 6, and the stop rod 9 limits the extreme position of the second moving seat 6 to prevent overtravel. The trapezoidal block 12 on the side wall of the second moving seat 6 moves accordingly. The trapezoidal block 12 and the trapezoidal groove 11 on the side wall of the main clamp 10 are adapted to each other and interlocked, so that the main clamp 10 and the second moving seat 6 form a rigid connection. Driven by the second moving seat 6, the main clamp 10 moves closer to the bending die 4, pressing and fixing the front end of the main board of the bending workpiece 22 onto the bending die 4. The bending workpiece 22 is clamped and fixed by the auxiliary clamp 20 and the main clamp 10. The front end of the main board is clamped by the main clamp 10 and the bending die 4, and the side plate is supported and limited by the auxiliary clamp 20, forming a stable fixed state before bending. When the bending operation begins, the auxiliary clamp 20 remains fixed, and the first servo motor 3 starts and drives the rotating seat 7 to rotate around its axis. Since the bending die 4 is installed at the end of the rotating seat 7, and the main clamp 10 is connected to the second movable seat 6 through the trapezoidal block 12, and the second movable seat 6 is set in the sliding groove of the rotating seat 7, the rotation of the rotating seat 7 drives the bending die 4 and the main clamp 10 to rotate synchronously. The front end of the main plate of the bent workpiece 22 is clamped and fixed by the main clamp 10 and the bending die 4, and rotates together with the rotating seat 7, while the side plate gradually undergoes plastic deformation under the limiting action of the auxiliary clamp 20, bending towards the main plate. During rotation, the limiting groove on the bending die 4 continuously constrains the first side plate of the bending workpiece 22, while the guide groove guides the deformation direction of the second side plate, ensuring that the bending angle is precise and controllable. The rotating seat 7 stops after rotating to the preset angle, and the first and second side plates of the bending workpiece 22 are completed and formed. After bending is completed, the first servo motor 3 drives the rotating seat 7 to rotate in the opposite direction to reset, the second servo motor 14 reverses to make the threaded rod 13 rotate in the opposite direction, the second moving seat 6 drives the main clamp 10 away from the bending mold 4, releases the bent workpiece 22, the first moving seat 5 moves in the opposite direction along the slide rail 16, drives the auxiliary clamp 20 away from the bending mold 4, the operator takes out the bent workpiece, and the equipment enters the next work cycle.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A bending fixture, comprising a worktable (1) and a bending workpiece (22), characterized in that, The workbench (1) has multiple legs (2) at its end. The workbench (1) has a rotating seat (7) on its side wall. The rotating seat (7) has a bending mold (4) at its end for fixing the bent workpiece (22). The workbench (1) has an auxiliary clamp (20) for bending the bent workpiece (22). The rotating seat (7) has a main clamp (10) for fixing the bent workpiece (22). The workbench (1) has a dovetail block (19) for fixing the auxiliary clamp (20). The rotating seat (7) has a trapezoidal block (12) for fixing the main clamp (10).

2. The bending fixture according to claim 1, characterized in that, The workbench (1) is equipped with a first servo motor (3) at the bottom. The output end of the first servo motor (3) is connected to the end of the rotating seat (7). The bending mold (4) is installed at the end of the rotating seat (7).

3. A bending fixture according to claim 2, characterized in that, The bending die (4) has a linearly formed limiting groove and a guide groove, both of which are adapted to the bending workpiece (22).

4. A bending fixture according to claim 1, characterized in that, The rotating seat (7) is provided with a sliding groove, the inner wall of the sliding groove is provided with a second moving seat (6), the inner wall of the sliding groove is provided with an inclined surface (8) symmetrically, and the inner wall of the sliding groove is provided with a stop rod (9).

5. A bending fixture according to claim 4, characterized in that, The rotating seat (7) has a fixed plate on its side wall, and a threaded rod (13) is inserted into the side wall of the fixed plate. The second moving seat (6) has a second servo motor (14) on its side wall, and the output end of the second servo motor (14) is connected to the threaded rod (13).

6. A bending fixture according to claim 1, characterized in that, The fixed plate sidewall is provided with a threaded bushing (15), the threaded rod (13) passes through the fixed plate sidewall, the threaded bushing (15) and the threaded rod (13) are threadedly connected, the trapezoidal block (12) is installed on the sidewall of the second moving seat (6), the main clamp (10) sidewall is provided with a trapezoidal groove (11), the trapezoidal groove (11) and the trapezoidal block (12) are mutually adapted.

7. A bending fixture according to claim 1, characterized in that, The workbench (1) is symmetrically provided with slide rails (16) at its end. The outer wall of the slide rails (16) is provided with sliders (17). The end of the sliders (17) is provided with a first movable seat (5). The auxiliary clamp (20) is installed on the side wall of the first movable seat (5).

8. A bending fixture according to claim 7, characterized in that, The first movable seat (5) has a dovetail block (19) on its side wall, and the auxiliary clamp (20) has a dovetail groove (18) on its side wall. The dovetail groove (18) and the dovetail block (19) are adapted to each other.

9. A bending fixture according to claim 8, characterized in that, The auxiliary clamp (20) has an auxiliary clamp fixing groove (21) on its side wall, and the auxiliary clamp fixing groove (21) and the bent workpiece (22) are compatible with each other.

10. A bending fixture according to claim 1, characterized in that, The bending workpiece 22 is composed of a main board and multiple side plates one and multiple side plates two. The multiple side plates one are symmetrically arranged on both sides of the main board, and multiple side plates two are arranged on the same side at both ends of the main board.

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