A bending mechanism of a bending tool

Abstract

The utility model is suitable for technical field of jigs and fixtures, provides a kind of bending mechanism of curved foot jigs, including support seat and positioning jigs;Vertical fixing frame is located on support seat, and a group of installation shaft is symmetrically distributed to its outside;Transmission screw rod is rotated between two installation shafts, and transmission block is threadedly cooperated on transmission screw rod, and L-shaped linkage support is located at the outside of transmission block;The top side of horizontal section of linkage support is provided with hydraulic cylinder along vertical direction;The end of hydraulic cylinder piston rod is sequentially connected with return spring, receiving plate, mounting seat and bending head;The device realizes the quick and accurate adjustment of the position of linkage support and receiving plate, ensures that bending head accurately aligns workpiece, simultaneously utilizes the compacting and adsorption function of electric push rod and pressing strip, effectively prevents workpiece displacement, enhances processing stability and durability, this design not only significantly improves processing efficiency, and provides solid foundation for accurate bending processing of workpiece, ensures the double promotion of processing precision and quality.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical tooling technology, and in particular relates to a bending mechanism for a bent-leg metallurgical tool. Background Technology

[0002] In modern manufacturing, especially in metal processing, automotive parts production, and building hardware, the precise processing of bent workpieces is an indispensable part; however, traditional bending processing methods, such as manual bending or using simple mechanical devices, have many limitations and shortcomings.

[0003] First, while manual bending is flexible, it is limited by the precision and fatigue of human operation, resulting in low processing efficiency and difficulty in ensuring the consistency and accuracy of the workpieces. For the production of large batches of high-precision bent workpieces, manual bending obviously cannot meet the requirements.

[0004] Secondly, although some simple mechanical bending devices can improve processing efficiency, the lack of a precise control system and a stable clamping mechanism makes the workpiece prone to displacement during processing, resulting in insufficient processing accuracy. In addition, these devices are often unable to adapt to bent workpieces of different sizes and shapes, and have poor flexibility. Utility Model Content

[0005] This utility model provides a bending mechanism for a bent foot fixture, aiming to solve the problems of low processing efficiency, difficulty in guaranteeing accuracy, and inability to meet the needs of large-scale, high-precision production of existing bending mechanisms; while simple mechanical bending devices can improve efficiency, they lack precise control and stable clamping, which can easily lead to workpiece displacement, insufficient processing accuracy, poor flexibility, and difficulty in adapting to various workpieces.

[0006] This utility model is implemented as follows: a bending mechanism for a bent foot fixture includes a support base, the top of which is provided with a positioning fixture.

[0007] A set of mounting shafts is symmetrically distributed on the outer side of a vertical fixing frame mounted on a support base;

[0008] A transmission screw rotates between two mounting shafts, and a transmission block is threaded onto the transmission screw. The transmission block slides against the side wall of the vertical fixed frame.

[0009] An L-shaped linkage bracket is located on the outside of the transmission block;

[0010] A hydraulic cylinder is installed on the top side of the horizontal section of the linkage bracket along the vertical direction;

[0011] A return spring is connected to the flange at the end of the hydraulic cylinder piston rod, and a damper is integrated inside the return spring.

[0012] A receiving plate is connected to the side of the return spring away from the hydraulic cylinder, and the receiving plate slides in conjunction with the vertical section of the linkage bracket;

[0013] A mounting base is provided on the outer side of the receiving plate, and a bent head is threaded on the bottom side of the mounting base;

[0014] A horizontal plate is provided on the outside of the mounting base;

[0015] An electric push rod is installed on the top side of the horizontal plate;

[0016] A pressure bar is connected to the end of the electric push rod piston rod.

[0017] Preferably, the inner cavity of the pressure strip is provided with an annular flow guiding cavity, and the bottom surface of the pressure strip is provided with vacuum adsorption micropores that communicate with the flow guiding cavity. The flow guiding cavity is connected to the vacuum generator pipeline.

[0018] Preferably, a set of guide rods arranged vertically are symmetrically distributed on the bottom side of the linkage bracket, and the receiving plate and the two guide rods are slidably connected by linear bearings.

[0019] Preferably, a laser sensor is provided on the side of the mounting base away from the horizontal plate.

[0020] Preferably, a reinforcing rib is provided between the support base and the vertical fixing frame.

[0021] Preferably, the bottom surface of the support base is provided with anti-slip texture, which can be either cross-shaped or crisscrossed.

[0022] Preferably, the positioning fixture has a positioning cavity with a V-shaped cross section, and the surface of the positioning cavity is provided with a hard alloy wear-resistant layer.

[0023] Preferably, a servo motor is provided on the outer side of one of the mounting shafts, and the output end of the servo motor is fixedly connected to the end of the transmission lead screw through a flexible coupling.

[0024] Compared with the prior art, the embodiments of this application have the following main advantages:

[0025] Firstly, this device uses an electric push rod and pressure bar to clamp and position the workpiece, effectively preventing displacement during processing and ensuring processing accuracy. At the same time, the connection between the annular guide cavity inside the pressure bar and the vacuum generator pipeline creates a negative pressure area, which firmly adheres the workpiece to the bottom surface of the pressure bar, further enhancing the stability and durability during processing. Through the clamping and adsorption functions, the operation process is not only simplified, but the processing quality and efficiency are also greatly improved.

[0026] Secondly, this device enables rapid and precise adjustment of the positions of the linkage bracket and the receiving plate. By driving the transmission screw to rotate through a servo motor, the positions of the linkage bracket and the receiving plate can be precisely controlled, thereby ensuring that the bending head can be accurately aligned with the workpiece. This design not only significantly improves processing efficiency, but more importantly, it ensures high stability during the processing, effectively preventing the bending head from shaking during processing, and providing a solid foundation for the precise bending of the workpiece. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0028] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0029] Figure 3 This is a three-dimensional structural schematic diagram of the present invention;

[0030] Figure 4 This is a front sectional view of the structure of this utility model;

[0031] Figure 5 This is a side sectional view of the present invention.

[0032] In the diagram: 1. Support base; 2. Positioning fixture; 3. Vertical fixing frame; 4. Mounting shaft; 5. Transmission screw; 6. Transmission block; 7. Linkage bracket; 8. Hydraulic cylinder; 9. Return spring; 10. Receiving plate; 11. Mounting base; 12. Bending head; 13. Horizontal plate; 14. Electric push rod; 15. Pressure strip; 16. Guide cavity; 17. Vacuum adsorption micropore; 18. Vacuum generator pipeline; 19. Guide rod; 20. Linear bearing; 21. Laser sensor; 22. Reinforcing rib; 23. Anti-slip texture; 24. Positioning cavity; 25. Servo motor. Detailed Implementation

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] This utility model embodiment provides a bending mechanism for a bent-leg fixture, such as... Figure 1-5 As shown, it includes a support base 1, and a positioning fixture 2 is provided on its top;

[0036] A set of mounting shafts 4 are symmetrically distributed on the outer side of a vertical fixing frame 3 located on the support base 1;

[0037] A transmission screw 5 rotates between two mounting shafts 4, and a transmission block 6 is threadedly fitted on the transmission screw 5. The transmission block 6 is slidably fitted with the side wall of the vertical fixed frame 3.

[0038] An L-shaped linkage bracket 7 is located on the outside of the transmission block 6;

[0039] A hydraulic cylinder 8 is installed on the top side of the horizontal section of the linkage bracket 7 along the vertical direction;

[0040] The piston rod end flange of hydraulic cylinder 8 is connected to return spring 9, and damper is integrated inside return spring 9;

[0041] The side of the return spring 9 away from the hydraulic cylinder 8 is connected to a support plate 10, and the support plate 10 slides in conjunction with the vertical section of the linkage bracket 7.

[0042] A mounting base 11 is provided on the outer side of the receiving plate 10, and a bent head 12 is threaded on the bottom side of the mounting base 11.

[0043] A horizontal plate 13 is provided on the outer side of the mounting base 11;

[0044] An electric push rod 14 is provided on the top side of the horizontal plate 13;

[0045] The piston rod end of the electric push rod 14 is connected to a pressure bar 15.

[0046] It should be noted that existing bending mechanisms suffer from low processing efficiency, difficulty in guaranteeing accuracy, and inability to meet the demands of mass production and high precision. While simple mechanical bending devices can improve efficiency, they lack precise control and stable clamping, easily leading to workpiece displacement, insufficient processing accuracy, and poor flexibility, making them unsuitable for diverse workpieces. This solution significantly improves processing efficiency and stability by integrating the clamping and adsorption functions of the electric push rod 14 and the pressure bar 15, as well as the rapid and precise adjustment of the positions of the linkage bracket 7 and the receiving plate 10. This design not only effectively prevents workpiece displacement during processing and ensures processing accuracy, but also further enhances the stability and durability of the workpiece through negative pressure adsorption, thereby simplifying the operation process and greatly improving processing quality and efficiency, providing a solid foundation for precise bending processing of workpieces.

[0047] Specifically, in this embodiment, the solution mainly includes a support base 1, on which a positioning fixture 2 is provided for precisely placing the bent workpiece to be processed; a vertical fixing frame 3 is installed on the support base 1, and a set of mounting shafts 4 are symmetrically distributed on its outer side, and a transmission screw 5 is rotatably connected between the two mounting shafts 4; a transmission block 6 is threaded on the transmission screw 5, and when the transmission screw 5 rotates, the transmission block 6 will slide along the side wall of the vertical fixing frame 3, thereby realizing horizontal displacement;

[0048] An L-shaped linkage bracket 7 is provided on the outside of the transmission block 6; a hydraulic cylinder 8 is installed on the top side of the horizontal section of the linkage bracket 7 in the vertical direction; when the hydraulic cylinder 8 works, its piston rod will extend downward and push the return spring 9 through the flange connection; the return spring 9 integrates a damper, which can provide buffer and stable return force when the piston rod of the hydraulic cylinder 8 retracts.

[0049] The return spring 9 is connected to the receiving plate 10 on the side away from the hydraulic cylinder 8. The receiving plate 10 is slidably engaged with the vertical section of the linkage bracket 7. Therefore, when the piston rod of the hydraulic cylinder 8 extends or retracts, the receiving plate 10 will slide up and down along the vertical section of the linkage bracket 7.

[0050] On the outer side of the receiving plate 10, there is a mounting base 11, and the bottom side of the mounting base 11 is connected to the bending head 12 by a threaded connection; the bending head 12 is used to perform bending processing on the workpiece.

[0051] In addition, a transverse plate 13 is provided on the outside of the mounting base 11, and an electric push rod 14 is installed on the top side of the transverse plate 13. The piston rod end of the electric push rod 14 is connected to the pressure bar 15. When the electric push rod 14 is working, its piston rod will extend forward and push the pressure bar 15 to press and position the side of the workpiece, so as to prevent the bent workpiece from shifting during the processing and improve the processing accuracy.

[0052] During the entire process, the workpiece is first placed in the designated position using the positioning fixture 2. Then, the positions of the linkage bracket 7 and the receiving plate 10 are adjusted by the cooperation of the transmission screw 5 and the transmission block 6, so that the bending head 12 is aligned with the workpiece. Subsequently, the electric push rod 14 extends its piston rod and presses the workpiece with the pressure bar 15. The hydraulic cylinder 8 extends its piston rod and presses the bending head 12 down onto the workpiece through the return spring 9 and the receiving plate 10. The bending head 12 continues to apply bending force until the workpiece reaches the required bending angle. After the processing is completed, the hydraulic cylinder 8 and the electric push rod 14 retract their piston rods respectively. The return spring 9 provides a buffering force, allowing the mechanism to return to its initial state, ready for the next processing.

[0053] In a further preferred embodiment of this utility model, such as Figure 2-3 As shown, the inner cavity of the pressure strip 15 is provided with an annular flow guiding cavity 16, and the bottom surface of the pressure strip 15 is provided with vacuum adsorption micropores 17 that are connected to the flow guiding cavity 16. The flow guiding cavity 16 is connected to the vacuum generator pipeline 18.

[0054] In this embodiment, the external vacuum generator is activated, and air is drawn from the guide cavity 16 through the vacuum generator pipeline 18, thereby forming a negative pressure area in the guide cavity 16 and the vacuum adsorption micropores 17 connected thereto. When the bottom surface of the pressure strip 15 is in close contact with the surface of the workpiece to be processed, the workpiece is firmly adsorbed on the bottom surface of the pressure strip 15 due to the negative pressure, so as to adapt to the changes in the workpiece surface and thus maintain the stability and durability of the adsorption force.

[0055] In a further preferred embodiment of this utility model, such as Figure 4 As shown, a set of guide rods 19 arranged vertically are symmetrically distributed on the bottom side of the linkage bracket 7, and the receiving plate 10 and the two guide rods 19 are slidably connected through a linear bearing 20.

[0056] In this embodiment, the guide rod 19 not only provides a clear movement trajectory for the receiving plate 10, but also ensures the stability and accuracy of the receiving plate 10 during the movement process, providing a stable, accurate and efficient movement method for the processing of bent workpieces, and meeting the needs of various processing or assembly processes.

[0057] In a further preferred embodiment of this utility model, such as Figure 3 As shown, a laser sensor 21 is provided on the side of the mounting base 11 away from the horizontal plate 13.

[0058] In this embodiment, the laser sensor 21 (LK-G500) emits and receives laser light to achieve precise measurement and monitoring of the bent workpiece. It can accurately measure key information such as the distance, position or shape between the target object and the laser sensor 21.

[0059] In a further preferred embodiment of this utility model, such as Figure 1-2As shown, a reinforcing rib 22 is provided between the support base 1 and the vertical fixing frame 3.

[0060] In this embodiment, when an external force is applied to the support 1 or the entire structure, the reinforcing rib 22 can effectively distribute these forces to the vertical fixing frame 3, thereby avoiding local overload or stress concentration. This dispersion effect not only improves the overall stability of the structure, but also extends its service life and reduces fatigue damage caused by long-term stress.

[0061] In a further preferred embodiment of this utility model, such as Figure 3 As shown, the bottom surface of the support base 1 is provided with anti-slip texture 23, which can be either cross-shaped or intersecting.

[0062] In this embodiment, when the support base 1 is placed on the ground or other supporting surface, the anti-slip texture 23 can be tightly embedded or fit into the tiny bumps and depressions of the surface to form an effective grip. This grip not only helps to prevent the support base 1 from sliding in the horizontal direction, but also provides additional stability when subjected to vertical forces.

[0063] In a further preferred embodiment of this utility model, such as Figure 5 As shown, the positioning fixture 2 has a V-shaped positioning cavity 24 inside, and the surface of the positioning cavity 24 is provided with a hard alloy wear-resistant layer.

[0064] In this embodiment, the positioning cavity 24 cooperates with the bending head 12 to bend the workpiece. The hard alloy wear-resistant layer ensures that the surface of the positioning cavity 24 remains smooth even after long-term use, reducing positioning errors caused by wear.

[0065] In a further preferred embodiment of this utility model, such as Figure 4 As shown, a servo motor 25 is installed on the outer side of one of the mounting shafts 4, and the output end of the servo motor 25 is fixedly connected to the end of the transmission screw 5 through a flexible coupling.

[0066] In this embodiment, the servo motor 25 starts and its output end drives the transmission screw 5 to rotate together through the flexible coupling.

[0067] Working principle: The bottom of the support base 1 of this device is provided with anti-slip texture 23, which can closely fit the small bumps and depressions of the ground or other support surfaces to form an effective grip, prevent horizontal sliding and provide stability in the vertical direction; the setting of the reinforcing rib 22 further enhances the connection strength between the support base 1 and the vertical fixed frame 3, disperses external forces, avoids local overload, and extends service life.

[0068] A vertical fixing frame 3 is provided on the support base 1, and two mounting shafts 4 are symmetrically distributed on its outer side. The two mounting shafts 4 are rotatably connected to the transmission screw 5. The servo motor 25 is mounted on the outer side of one of the mounting shafts 4, and its output end is fixedly connected to the end of the transmission screw 5 through a flexible coupling to ensure smooth and accurate power transmission.

[0069] The transmission screw 5 is threaded with a transmission block 6. When the servo motor 25 starts and drives the transmission screw 5 to rotate, the transmission block 6 will slide horizontally along the side wall of the vertical fixed frame 3, thereby achieving precise position adjustment.

[0070] An L-shaped linkage bracket 7 is provided on the outside of the transmission block 6, and a hydraulic cylinder 8 is installed on the top side of its horizontal section. When the hydraulic cylinder 8 is working, the piston rod extends downward and pushes the return spring 9 and the integrated damper through the flange connection. The other side of the return spring 9 is connected to the support plate 10, which slides with the vertical section of the linkage bracket 7, allowing the support plate 10 to slide up and down along the vertical section of the linkage bracket 7 when the piston rod of the hydraulic cylinder 8 extends or retracts. The guide rod 19 ensures that the movement trajectory of the support plate 10 is clear and stable.

[0071] The outer side of the receiving plate 10 is provided with a mounting base 11, and a bending head 12 is connected to the mounting base 11 by a thread for bending the workpiece; the positioning fixture 2 of the support base 1 has a positioning cavity 24 that mates with the bending head 12, and the surface of the positioning cavity 24 is covered with a hard alloy wear-resistant layer to ensure accuracy under long-term use.

[0072] In addition, a transverse plate 13 is installed on the outside of the mounting base 11, and an electric push rod 14 is installed on its upper side; the piston rod end of the electric push rod 14 is connected to a pressure strip 15. When the electric push rod 14 extends the piston rod, the pressure strip 15 presses and positions the side of the workpiece to ensure stability during the processing.

[0073] The inner cavity of the pressure bar 15 is provided with an annular guide cavity 16, which is connected to the vacuum generator pipeline 18. When the external vacuum generator is started, the air in the guide cavity 16 is extracted through the pipeline to form a negative pressure area, so that the workpiece is firmly adsorbed on the bottom surface of the pressure bar 15, maintaining the stability and durability during processing.

[0074] In the entire workflow, the workpiece is first placed in the designated position on the support base 1 using the positioning fixture 2. Then, the servo motor 25 is started, and the positions of the linkage bracket 7 and the receiving plate 10 are adjusted through the transmission screw 5 and the transmission block 6 so that the bending head 12 is aligned with the workpiece. Next, the electric push rod 14 extends its piston rod and presses the workpiece with the pressure bar 15. At the same time, the hydraulic cylinder 8 extends its piston rod and presses the bending head 12 down onto the workpiece through the return spring 9 and the receiving plate 10, applying bending force until the required angle is reached. After processing is completed, the hydraulic cylinder 8 and the electric push rod 14 retract their piston rods respectively, and the return spring 9 provides a buffer, allowing the system to return to its initial state and prepare for the next processing.

[0075] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0076] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units described above may be implemented in other ways in practice. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0077] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0078] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A bending mechanism for a bent-leg fixture, characterized in that, include: A support base, with a positioning fixture on its top; A set of mounting shafts is symmetrically distributed on the outer side of a vertical fixing frame mounted on a support base; A transmission screw rotates between two mounting shafts, and a transmission block is threaded onto the transmission screw. The transmission block slides against the side wall of the vertical fixed frame. An L-shaped linkage bracket is located on the outside of the transmission block; A hydraulic cylinder is installed on the top side of the horizontal section of the linkage bracket along the vertical direction; A return spring is connected to the flange at the end of the hydraulic cylinder piston rod, and a damper is integrated inside the return spring. A receiving plate is connected to the side of the return spring away from the hydraulic cylinder, and the receiving plate slides in conjunction with the vertical section of the linkage bracket; A mounting base is provided on the outer side of the receiving plate, and a bent head is threaded on the bottom side of the mounting base; A horizontal plate is provided on the outside of the mounting base; An electric push rod is installed on the top side of the horizontal plate; A pressure bar is connected to the end of the electric push rod piston rod.

2. The bending mechanism of a bent-leg fixture as described in claim 1, characterized in that, The inner cavity of the pressure strip is provided with an annular flow guiding cavity, and the bottom surface of the pressure strip is provided with vacuum adsorption micropores that are connected to the flow guiding cavity. The flow guiding cavity is connected to the vacuum generator pipeline.

3. The bending mechanism of a bent-leg fixture as described in claim 1, characterized in that, A set of guide rods arranged vertically are symmetrically distributed on the bottom side of the linkage bracket, and the receiving plate and the two guide rods are slidably connected by linear bearings.

4. The bending mechanism of a bent-leg fixture as described in claim 1, characterized in that, A laser sensor is located on the side of the mounting base away from the horizontal plate.

5. The bending mechanism of a bent-leg fixture as described in claim 1, characterized in that, Reinforcing ribs are provided between the support base and the vertical fixing frame.

6. The bending mechanism of a bent-leg fixture as described in claim 5, characterized in that, The bottom surface of the support base is provided with anti-slip texture, which can be either cross-shaped or crisscrossed.

7. The bending mechanism of a bent-leg fixture as described in claim 1, characterized in that, The positioning fixture has a V-shaped positioning cavity, and the surface of the positioning cavity is covered with a hard alloy wear-resistant layer.

8. The bending mechanism of a bent-leg fixture as described in claim 1, characterized in that, One of the mounting shafts has a servo motor mounted on its outer side, and the output end of the servo motor is fixedly connected to the end of the transmission lead screw via a flexible coupling.

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