Sheet metal part bending positioning tool

Abstract

This utility model relates to the field of sheet metal bending technology, specifically to a sheet metal bending positioning fixture, comprising: a machine base, a bending assembly, a feeding assembly, a clamping mechanism, and a collector; the bending assembly includes a drive cylinder, a bending block, a fixed plate, a driven plate, and a pressing plate; the output end of the drive cylinder is fixedly connected to the bending block, and the bending block is fixedly connected to the fixed plate; the driven plate consists of a sliding plate, a first spring, and a pressing shell; the sliding plate is fixedly connected to the first spring. When the pressing shell presses against the clamping device, the clamping device slides on the surface of the clamping table and moves towards the center simultaneously through two sets of clamping devices, thus centering and clamping the sheet metal part. This fixture can clamp sheet metal parts of different lengths, facilitating the bending block's pressing and bending of the sheet metal part towards its center.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal bending technology, specifically to a sheet metal bending positioning fixture. Background Technology

[0002] Early sheet metal bending relied primarily on manual labor. Craftsmen used experience and simple tools, such as hammers and anvils, to bend sheet metal. This method was inefficient, and the processing accuracy depended entirely on the craftsman's skill, resulting in inconsistent product quality. With the acceleration of industrialization, the demand for sheet metal surged. Traditional manual bending could not meet the requirements of large-scale, high-precision production, prompting the exploration of mechanized bending technology. From the initial simple lever-type bending equipment to later hydraulic bending machines, bending efficiency and accuracy gradually improved. However, shortcomings remained in areas such as bending complex shapes and multi-batch production, further driving the development of bending technology towards automation and intelligence.

[0003] Sheet metal bending technology is widely used in the manufacturing of casings for electronic devices such as mobile phones, tablets, and laptops. Through bending, thin metal sheets can be processed into casings with specific shapes and structures. For example, mobile phone frames require precise bending to achieve a tight fit between the screen and internal components, while ensuring a smooth and aesthetically pleasing appearance. Internal components of electronic devices, such as heat sinks and shielding covers, also require bending to form specific heat dissipation channels and shielding structures, meeting the heat dissipation and electromagnetic shielding requirements of electronic devices and improving product performance and reliability.

[0004] Utility model application CN202421102765.1 relates to a welding fixture for sheet metal bending products, including a work platform. The work platform has a fixture unit for clamping sheet metal parts. The sheet metal parts include a sheet metal frame and a sheet metal bending edge located on the outer bottom of the sheet metal frame. The fixture unit includes four diagonal clamping units, two side positioning units, and two side clamping units. This utility model, through the clamping treatment of the diagonal clamping units and the use of a push-press clamping structure, can ensure the stability of the weld position, thereby improving the welding quality.

[0005] The aforementioned patent improves the stability of sheet metal parts by clamping them diagonally with clamping units. However, when positioning sheet metal parts, it cannot clean the floating dust and debris around the sheet metal parts, nor can it clamp and center sheet metal parts of different lengths.

[0006] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Utility Model Content

[0007] The purpose of this utility model is to provide a sheet metal bending and positioning fixture that can effectively solve the above-mentioned technical problems.

[0008] To achieve the purpose of this utility model, the following technical solution is adopted:

[0009] A sheet metal bending and positioning fixture includes: a bending assembly, an ejector assembly, a clamping mechanism, and a collector;

[0010] The bending assembly includes a driving cylinder, a bending block, a fixed plate, a driven plate, and a pressing plate; the output end of the driving cylinder is fixedly connected to the bending block, and the bending block is fixedly connected to the fixed plate;

[0011] The driven plate consists of a sliding plate, a first spring, and a pressing shell; the sliding plate is fixedly connected to the first spring, the first spring is fixedly connected to the pressing shell, the sliding plate slides inside the pressing shell, and one end of the sliding plate is connected to the fixed plate through a torsion spring;

[0012] The pressing plate includes a first plate, a first torsion spring, a second plate, and a cleaning brush; the first plate is fixedly connected to the first torsion spring, the second plate is fixedly connected to the first torsion spring, and the end of the second plate is fixedly connected to the cleaning brush.

[0013] Furthermore, the clamping mechanism consists of a clamping platform, a clamping device, and a second spring pushing assembly; the surface of the clamping platform is provided with a groove, the bottom of the clamping device is provided with a connecting rod, the clamping device slides in the groove on the surface of the clamping platform through the connecting rod, and the connecting rod is fixedly connected to the clamping platform through the second spring.

[0014] Furthermore, the pushing assembly includes a retainer, a sleeve, a third spring, a connecting rod, and a pushing plate; the retainer is fixedly connected to the clamping table, the retainer is fixedly connected to the sleeve, the sleeve is fixedly connected to one end of the third spring, the other end of the third spring is fixedly connected to the connecting rod, and the pushing plate is fixedly connected to the connecting rod.

[0015] Furthermore, the top material assembly comprises a bending block, a fourth spring, and a limiting rod; the bending block is fixedly connected to the limiting rod, the fourth spring is fixedly connected to the bending block, and the limiting rod is slidably connected to the machine base.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a sheet metal bending positioning fixture, in which the clamping device slides on the surface of the clamping table when the pressing shell squeezes the clamping device, and the sheet metal part is centered and clamped by two sets of clamping devices moving towards the center at the same time. It can clamp sheet metal parts of different lengths, so that the bending block can press and bend the sheet metal part to the center. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] Figure 1 This is a structural schematic diagram of a sheet metal bending and positioning fixture according to the present invention;

[0019] Figure 2 This is a schematic diagram of the bending component of a sheet metal bending positioning fixture according to the present invention.

[0020] Figure 3 This is a schematic diagram of the pressing plate of a sheet metal bending and positioning fixture according to the present invention;

[0021] Figure 4 This is a schematic diagram of the clamping mechanism of a sheet metal bending and positioning fixture according to the present invention.

[0022] Figure 5 This utility model relates to a sheet metal bending and positioning fixture. Figure 4 Enlarged view of point A in the middle;

[0023] Figure 6 This is a schematic diagram of the pusher assembly of a sheet metal bending and positioning fixture according to the present invention.

[0024] Figure 7 This is a schematic diagram of the top material assembly of a sheet metal bending and positioning fixture according to the present invention.

[0025] In the diagram: 1. Machine base; 11. Fixed platform; 12. Telescopic rod; 2. Bending assembly; 21. Drive cylinder; 22. Bending block; 23. Fixed plate; 24. Driven plate; 241. Slide plate; 242. First spring; 243. Pressing shell; 25. Pressing plate; 251. First plate body; 252. First torsion spring; 253. Second plate body; 254. Cleaning brush; 3. Clamping mechanism; 31. Clamping platform; 32. Clamper; 33. Second spring; 34. Pushing assembly; 341. Fixer; 342. Sleeve; 343. Third spring; 344. Connecting rod; 345. Pushing plate; 4. Ejector assembly; 41. Ejector block; 42. Fourth spring; 43. Limiting rod; 5. Collector; 51. Discharge plate; 52. Collection box. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0027] In the description of this utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. When a mechanism is referred to as being "fixed to" another mechanism, it can be directly on the other mechanism or there may be an intervening mechanism. When a mechanism is considered to be "connected" to another mechanism, it can be directly connected to the other mechanism or there may be an intervening mechanism at the same time. When a mechanism is considered to be "set on" another mechanism, it can be directly set on the other mechanism or there may be an intervening mechanism at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0028] like Figures 1 to 7 As shown, a sheet metal bending and positioning fixture includes: a machine base 1, a bending assembly 2, a material ejector assembly 4, a clamping mechanism 3, and a collector 5;

[0029] The machine base 1 consists of a fixed platform 11 and a telescopic rod 12; the fixed platform 11 is fixedly connected to the drive cylinder 21 to fix the drive cylinder 21.

[0030] The bending assembly 2 includes a drive cylinder 21, a bending block 22, a fixed plate 23, a driven plate 24, and a pressing plate 25. The output end of the drive cylinder 21 is fixedly connected to the bending block 22, and the bending block 22 is fixedly connected to the fixed plate 23. By activating the drive cylinder 21, the bending block 22 is driven to move downward to press and bend the sheet metal part. The driven plate 24 and the pressing plate 25 are both placed at an angle. While the bending block 22 is pressed down, the driven plate 24 and the pressing plate 25 will move downward.

[0031] The driven plate 24 is composed of a sliding plate 241, a first spring 242, and a pressing shell 243. The sliding plate 241 is fixedly connected to the first spring 242, and the first spring 242 is fixedly connected to the pressing shell 243. The sliding plate 241 slides inside the pressing shell 243. One end of the sliding plate 241 is connected to the fixed plate 23 through a torsion spring. Since the driven plate 24 is placed at an angle, when the bending block 22 is pressed down, the driven plate 24 will also be pressed down. When the pressing shell 243 touches the clamp 32, the pressing shell 243 moves towards the sliding plate 241 due to the squeezing force it receives from touching the clamp 32. The pressing shell 243 applies horizontal pressure to the clamp 32 to squeeze the clamp 32 to displace it.

[0032] Meanwhile, the contact position between the pressing shell 243 and the clamp 32 is circular, so that pressure can be applied from all directions when the pressing shell 243 squeezes the clamp 32.

[0033] The pressing plate 25, the driven plate 24, the clamp 32, and the second spring 33 are all provided in two sets mirror images along the long side of the bending block 22.

[0034] The clamping mechanism 3 consists of a clamping platform 31, a clamping device 32, a second spring 33, and a pushing assembly 34. The clamping platform 31 has a groove on its surface, and the clamping device 32 has a connecting rod at its bottom. The clamping device 32 slides in the groove on the surface of the clamping platform 31 through the connecting rod. The connecting rod is fixedly connected to the clamping platform 31 through the second spring 33. When the pressing shell 243 squeezes the clamping device 32, the clamping device 32 slides on the surface of the clamping platform 31 and moves towards the center simultaneously through the two sets of clamping devices 32 to perform centered positioning and clamping of the sheet metal part. It can clamp sheet metal parts of different lengths so that the bending block 22 can press and bend the sheet metal part at the center.

[0035] The pressing plate 25 includes a first plate 251, a first torsion spring 252, a second plate 253, and a cleaning brush 254. The first plate 251 is fixedly connected to the first torsion spring 252, the second plate 253 is fixedly connected to the first torsion spring 252, and the end of the second plate 253 is fixedly connected to the cleaning brush 254. When the bending block 22 moves the pressing plate 25 downward, the pressing plate 25 is tilted and can be reset by the first torsion spring 252. During the pressing process, the second plate 253 gradually comes into contact with the clamping table 31. At the same time, the cleaning brush 254 at the end of the second plate 253 will also sweep and brush the clamping table 31 to remove the floating dust generated during the bending process.

[0036] The pushing assembly 34 includes a retainer 341, a sleeve 342, a third spring 343, a connecting rod 344, and a pushing plate 345. The retainer 341 is fixedly connected to the clamping table 31, and the retainer 341 is fixedly connected to the sleeve 342. One end of the sleeve 342 is fixedly connected to the third spring 343, and the other end of the third spring 343 is fixedly connected to the connecting rod 344. The pushing plate 345 is fixedly connected to the connecting rod 344. During the bending process, the bending block 22 drives the second plate 253 to press down. During the pressing down of the second plate 253, an oblique pressure is applied to the pushing plate 345, forcing the pushing plate 345 to move towards the retainer 341, preventing the pushing plate 345 from affecting the bending process. After bending, the bending block 22 is lifted, and the second plate 253 gradually loses pressure on the pusher plate 345. The pusher plate 345 applies pressure to the middle of the clamping table 31 through the elastic force of the third spring 343. At the same time, since the two ends of the bent sheet metal are in a lifted state, the pusher plate 345 will push the sheet metal out to complete the automatic unloading action, without the need for manual unloading by the staff.

[0037] The ejector assembly 4 consists of an ejector block 41, a fourth spring 42, and a limiting rod 43. The ejector block 41 is fixedly connected to the limiting rod 43, the fourth spring 42 is fixedly connected to the ejector block 41, and the limiting rod 43 is slidably connected to the machine tool. The fourth spring 42, connected to the ejector block 41, provides elastic buffering and restoring force for the entire ejector assembly 4. When the ejector block 41 applies pressure to the sheet metal part for bending, the fourth spring 42 will undergo corresponding compression deformation according to the magnitude of the applied pressure, storing elastic potential energy. After the bending operation is completed, the fourth spring 42 will release the stored elastic potential energy, allowing the ejector block 41 to return to its initial position and eject the bent sheet metal part for easy removal. The limiting rod 43, slidably connected to the machine tool, provides stable support and guidance for the ejector block 41, ensuring that the ejector block 41 can move along a predetermined direction during the bending operation, thus improving the bending accuracy. On the other hand, the sliding connection of the limit rod 43 allows the top material assembly 4 to be adjusted within a certain range according to the different sizes and shapes of the sheet metal parts.

[0038] The collector 5 includes a discharge plate 51 and a collection box 52. After the pusher plate 345 pushes the sheet metal part, the sheet metal part slides through the discharge plate 51 to the collection box 52 for collection.

[0039] Working principle:

[0040] The piston inside the first cylinder 11 extends outward under air pressure, driving the pressing block 13 to move towards the sheet metal part. The pressing block 13 contacts the surface of the sheet metal part and, under the continuous thrust of the first cylinder 11, applies pressure to the sheet metal part, assisting in completing bending and other processing operations of the sheet metal part. During the pressing process, the telescopic rod 14 continuously supports the fixed platform 12, ensuring the stability of the fixed platform 12, while buffering and absorbing vibration, ensuring the smooth operation of the entire pressing assembly 1. The torsion spring 22 acts as an elastic connection between the first pressing plate 21 and the second pressing plate 23. When an external force is applied to the pressing plate 2, the first pressing plate 21 and the second pressing plate 23 can rotate or move relative to each other, and the torsion spring 22 will deform and store elastic potential energy. When the external force is removed, the torsion spring 22 will return to its original shape, pushing the first pressing plate 21 and the second pressing plate 23 back to their original positions, so that the pressing plate 2 maintains a certain elasticity and adjustability. At the same time, the spring 42 is connected to the bending block 41, providing elastic buffering and restoring force for the entire top material assembly 4. When the bending block 41 applies pressure to the sheet metal part to perform a bending operation, the spring 42 will undergo corresponding compression deformation according to the magnitude of the pressure, storing elastic potential energy. After the bending operation is completed, the spring 42 will release the stored elastic potential energy, allowing the bending block 41 to return to its initial position and expanding the bending range of the sheet metal part.

[0041] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0042] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A sheet metal bending and positioning fixture, characterized in that, include: Machine base, bending assembly, ejector assembly, clamping mechanism, collector; The bending assembly includes a driving cylinder, a bending block, a fixed plate, a driven plate, and a pressing plate; the output end of the driving cylinder is fixedly connected to the bending block, and the bending block is fixedly connected to the fixed plate; The driven plate consists of a sliding plate, a first spring, and a pressing shell; the sliding plate is fixedly connected to the first spring, the first spring is fixedly connected to the pressing shell, the sliding plate slides inside the pressing shell, and one end of the sliding plate is connected to the fixed plate through a torsion spring; The pressing plate includes a first plate, a first torsion spring, a second plate, and a cleaning brush; the first plate is fixedly connected to the first torsion spring, the second plate is fixedly connected to the first torsion spring, and the end of the second plate is fixedly connected to the cleaning brush.

2. The sheet metal bending and positioning fixture as described in claim 1, characterized in that, The clamping mechanism consists of a clamping platform, a clamping device, and a second spring pushing assembly. The surface of the clamping platform is provided with a groove, and the bottom of the clamping device is provided with a connecting rod. The clamping device slides in the groove on the surface of the clamping platform through the connecting rod, and the connecting rod is fixedly connected to the clamping platform through the second spring.

3. The sheet metal bending and positioning fixture as described in claim 2, characterized in that, The pushing assembly includes a retainer, a sleeve, a third spring, a connecting rod, and a pushing plate; the retainer is fixedly connected to the clamping table, the retainer is fixedly connected to the sleeve, the sleeve is fixedly connected to one end of the third spring, the other end of the third spring is fixedly connected to the connecting rod, and the pushing plate is fixedly connected to the connecting rod.

4. The sheet metal bending and positioning fixture as described in claim 1, characterized in that, The top material assembly consists of a bending block, a fourth spring, and a limiting rod; the bending block is fixedly connected to the limiting rod, the fourth spring is fixedly connected to the bending block, and the limiting rod is slidably connected to the machine platform.

Images