Workpiece pressing assembly

Abstract

The utility model provides a workpiece pressing assembly which comprises an upper support, a limiting hole is formed in the inner bottom of the upper support, and a clamping mechanism is connected into the limiting hole in a sliding mode. According to the workpiece pressing assembly, through the arrangement of the clamping mechanism, when the workpiece pressing assembly is used, a workpiece is placed between the lower clamping plate and the upper clamping plate, then the hydraulic rod at the bottom is started, the hydraulic rod stretches out and draws back and drives the lower protruding block at the tail end to move, and the lower protruding block pushes the upper protruding block at the top to move; the upper protruding block and the lower protruding block are matched, the lower clamping plate on the sliding rod at the top of the upper protruding block moves, a workpiece in the middle is clamped and fixed, the lower clamping plate slides on the limiting rod on one side in the moving process, scale marks are further engraved on the surface of the limiting rod, workers can clearly observe the thickness of the workpiece, and the working efficiency is improved. And welding parameters can be correspondingly adjusted, so that the phenomenon of unstable welding quality is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of workpiece clamping technology and relates to a workpiece clamping assembly. Background Technology

[0002] In today's booming automotive manufacturing industry, the production processes of automotive parts are becoming increasingly precise and complex. As a highly integrated product, the quality of automotive parts directly affects the performance, safety, and reliability of the entire vehicle. Among these processes, welding plays a crucial role in automotive parts manufacturing. Many key components, such as the body frame and engine mounts, require welding for assembly. For welding, precise part positioning is the primary prerequisite for ensuring weld quality. Different automotive parts vary in shape, size, and material. During welding, they must be accurately positioned in their predetermined locations to guarantee the accuracy, strength, and appearance quality of the weld. Any slight positional deviation can lead to welding defects, such as incomplete welds, missed welds, or uneven welds, thereby affecting the performance and lifespan of the parts and potentially causing safety hazards during vehicle operation. Therefore, the use of high-precision positioning fixtures has become an indispensable part of automotive parts welding production.

[0003] Currently, traditional workpiece clamping assemblies (positioning fixtures) primarily focus on firmly fixing the workpiece in the welding position. However, in actual production, the critical parameter of workpiece thickness is often overlooked. Different batches of workpieces may exhibit variations in thickness due to differences in raw materials and machining precision. During welding, changes in workpiece thickness affect welding parameters (such as welding current, voltage, and welding speed). If operators cannot promptly ascertain the workpiece thickness, it becomes difficult to adjust welding parameters accordingly, easily leading to unstable welding quality, such as welds that are too deep or too shallow, or poor fusion. Therefore, a workpiece clamping assembly is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a workpiece clamping assembly, which aims to solve the problem that the main function of traditional workpiece clamping assemblies (positioning fixtures) is to firmly fix the workpiece in the welding position, but in actual production, the key parameter of workpiece thickness is often overlooked.

[0005] To solve the above-mentioned technical problems, this utility model provides a workpiece clamping assembly, including an upper bracket. A limiting hole is formed in the inner bottom of the upper bracket, and a clamping mechanism is slidably connected inside the limiting hole. A connecting plate is fixedly connected to the bottom of the upper bracket, and a lifting mechanism is fixedly connected to the bottom of the connecting plate. The clamping mechanism includes a sliding rod slidably connected inside the limiting hole, a lower clamping plate fixedly connected to the top of the sliding rod, and a limiting rod slidably connected to one side of the lower clamping plate. The surface of the limiting rod is engraved with scale lines. The lifting mechanism includes two fixed joints fixedly connected to the bottom of the connecting plate. A rotating rod is rotatably connected to the surface of each fixed joint, and a threaded block is rotatably connected to the bottom of the rotating rod. A positive and negative lead screw is threaded inside the threaded block, and a drive motor is fixedly connected to one side of the positive and negative lead screw.

[0006] As a further embodiment of this utility model, a support spring is sleeved on the lower surface of the sliding rod, and an upper protrusion is fixedly connected to the bottom of the support spring. The upper protrusion serves to drive the sliding rod to rise and fall.

[0007] As a further embodiment of this utility model, a lower protrusion is slidably connected to the bottom of the upper protrusion, and a hydraulic rod is fixedly connected to one side of the lower protrusion. The hydraulic rod serves to drive the lower protrusion to move.

[0008] As a further embodiment of this utility model, four telescopic rods are fixedly connected to the bottom of the connecting plate, and a base is fixedly connected to the bottom of each telescopic rod. The base serves to support the equipment.

[0009] As a further embodiment of this utility model, a motor housing is fixedly connected to the surface of the drive motor. The motor housing is installed on the edge of one side of the top surface of the base. The motor housing serves to protect the drive motor.

[0010] As a further embodiment of this utility model, four connecting rods are fixedly connected to the top of the upper bracket, and an upper clamping plate is fixedly connected to the bottom of the connecting rods. The upper clamping plate serves to clamp and position the workpiece.

[0011] As a further embodiment of this utility model, the bottom of the upper clamping plate is equipped with several anti-slip grooves, which are adapted to the anti-slip grooves on the surface of the lower clamping plate. The anti-slip grooves serve to prevent slipping.

[0012] This utility model provides a workpiece clamping assembly, which has the following beneficial effects:

[0013] 1. This workpiece clamping assembly, through its clamping mechanism, allows the workpiece to be placed between the lower and upper clamping plates during use. The bottom hydraulic rod is then activated, extending and retracting to move the lower protrusion at its end. This protrusion pushes the upper protrusion at the top, causing the lower clamping plate on the sliding rod at the top of the upper protrusion to move, thus clamping and fixing the workpiece in the middle. During this movement, the lower clamping plate slides along a limiting rod on one side. The limiting rod has graduated lines on its surface, allowing workers to clearly observe the workpiece thickness and adjust welding parameters accordingly, preventing unstable welding quality.

[0014] 2. This workpiece clamping assembly, through its lifting mechanism, allows for the operation of the following: activating the drive motor on one side rotates the lead screw at the end. The two threaded blocks connected to the lead screw surface move relative to each other, causing the rotating rod on the surface to rotate. This allows for height adjustment of the connecting plate at the top of the rotating rod, facilitating the raising and lowering of the upper and lower clamping plates to adapt to different installation environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the lifting mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the clamping mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the hydraulic rod structure of this utility model.

[0019] In the diagram: 1. Upper bracket; 2. Clamping mechanism; 201. Sliding rod; 202. Lower clamping plate; 203. Limiting rod; 3. Connecting plate; 4. Lifting mechanism; 401. Fixed joint; 402. Rotating rod; 403. Threaded block; 404. Positive and negative lead screws; 405. Drive motor; 5. Support spring; 6. Upper protrusion; 7. Lower protrusion; 8. Hydraulic rod; 9. Telescopic rod; 10. Base; 11. Connecting rod; 12. Upper clamping plate; 13. Motor box. Detailed Implementation

[0020] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the workpiece clamping assembly proposed in this utility model. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model. The same or similar reference numerals in the drawings represent the same or similar parts.

[0021] Please see Figures 1 to 4 This utility model provides a technical solution: a workpiece clamping assembly, including an upper bracket 1. A limiting hole is formed in the inner bottom of the upper bracket 1, and a clamping mechanism 2 is slidably connected inside the limiting hole. The clamping mechanism 2 prevents unstable welding quality. A connecting plate 3 is fixedly connected to the bottom of the upper bracket 1, and a lifting mechanism 4 is fixedly connected to the bottom of the connecting plate 3. The lifting mechanism 4 allows for height adjustment of the connecting plate 3 at the top of the rotating rod 402, facilitating the raising and lowering of the upper clamping plate 12 and the lower clamping plate 202 to adapt to different installation environments.

[0022] The clamping mechanism 2 includes a sliding rod 201 slidably connected inside the limiting hole. A lower clamping plate 202 is fixedly connected to the top of the sliding rod 201. A limiting rod 203 is slidably connected to one side of the lower clamping plate 202. The surface of the limiting rod 203 is engraved with scale lines.

[0023] The lifting mechanism 4 includes two fixed joints 401 fixedly connected to the bottom of the connecting plate 3. A rotating rod 402 is rotatably connected to the surface of the fixed joint 401. A threaded block 403 is rotatably connected to the bottom of the rotating rod 402. A positive and negative screw 404 is threadedly connected inside the threaded block 403. A drive motor 405 is fixedly connected to one side of the positive and negative screw 404.

[0024] A support spring 5 is sleeved on the lower surface of the sliding rod 201. An upper protrusion 6 is fixedly connected to the bottom of the support spring 5. The upper protrusion 6 is used to drive the sliding rod 201 to rise and fall.

[0025] The bottom of the upper protrusion 6 is slidably connected to the lower protrusion 7, and a hydraulic rod 8 is fixedly connected to one side of the lower protrusion 7. The hydraulic rod 8 is used to drive the lower protrusion 7 to move.

[0026] Four telescopic rods 9 are fixedly connected to the bottom of the connecting plate 3, and a base 10 is fixedly connected to the bottom of the telescopic rods 9. The base 10 serves to support the equipment.

[0027] A motor housing 13 is fixedly connected to the surface of the drive motor 405. The motor housing 13 is installed on the edge of one side of the top surface of the base 10. The motor housing 13 serves to protect the drive motor 405.

[0028] Four connecting rods 11 are fixedly connected to the top of the upper bracket 1, and an upper clamping plate 12 is fixedly connected to the bottom of the connecting rods 11. The upper clamping plate 12 is used to clamp and position the workpiece.

[0029] The bottom of the upper clamping plate 12 is equipped with several anti-slip grooves, which are compatible with the anti-slip grooves on the surface of the lower clamping plate 202. The anti-slip grooves play an anti-slip role.

[0030] In this invention, the working steps of the device are as follows:

[0031] First step: When using the device, place the workpiece in the middle of the lower clamping plate 202 and the upper clamping plate 12. Then, activate the hydraulic rod 8 at the bottom. The hydraulic rod 8 extends and retracts, causing the lower protrusion 7 at the end to move. The lower protrusion 7 pushes the upper protrusion 6 at the top to move, causing the lower clamping plate 202 on the sliding rod 201 at the top of the upper protrusion 6 to move, thereby clamping and fixing the workpiece in the middle. During the movement, the lower clamping plate 202 will slide on the limiting rod 203 on one side. Moreover, the surface of the limiting rod 203 is engraved with scale lines, so the operator can clearly observe the thickness of the workpiece and adjust the welding parameters accordingly.

[0032] Second step: When in use, start the drive motor 405 on one side. The drive motor 405 drives the positive and negative lead screw 404 at the end to rotate. The two threaded blocks 403 connected by threads on the surface of the positive and negative lead screw 404 move relative to each other on the surface of the positive and negative lead screw 404, and drive the rotating rod 402 on the surface to rotate.

[0033] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0034] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A workpiece hold-down assembly comprising: The upper bracket (1) is characterized in that: a limiting hole is provided at the bottom of the upper bracket (1), a clamping mechanism (2) is slidably connected inside the limiting hole, a connecting plate (3) is fixedly connected to the bottom of the upper bracket (1), and a lifting mechanism (4) is fixedly connected to the bottom of the connecting plate (3). The clamping mechanism (2) includes a sliding rod (201) slidably connected inside the limiting hole. A lower clamping plate (202) is fixedly connected to the top of the sliding rod (201). A limiting rod (203) is slidably connected to one side of the lower clamping plate (202). The surface of the limiting rod (203) is engraved with scale lines. The lifting mechanism (4) includes two fixed joints (401) fixedly connected to the bottom of the connecting plate (3). A rotating rod (402) is rotatably connected to the surface of the fixed joint (401). A threaded block (403) is rotatably connected to the bottom of the rotating rod (402). A positive and negative screw (404) is threaded inside the threaded block (403). A drive motor (405) is fixedly connected to one side of the positive and negative screw (404).

2. A workpiece hold-down assembly as defined in claim 1, wherein, A support spring (5) is sleeved on the lower surface of the sliding rod (201), and an upper protrusion (6) is fixedly connected to the bottom of the support spring (5).

3. A workpiece hold-down assembly as defined in claim 2, wherein, The bottom of the upper protrusion (6) is slidably connected to the lower protrusion (7), and a hydraulic rod (8) is fixedly connected to one side of the lower protrusion (7).

4. The workpiece hold-down assembly of claim 1, wherein, The bottom of the connecting plate (3) is fixedly connected to four telescopic rods (9), and the bottom of the telescopic rods (9) is fixedly connected to a base (10).

5. The workpiece clamping assembly according to claim 1, characterized in that, The surface of the drive motor (405) is fixedly connected to a motor housing (13), which is installed on the edge of the top surface of the base (10).

6. The workpiece hold-down assembly of claim 1, wherein, The top of the upper bracket (1) is fixedly connected to four connecting rods (11), and the bottom of the connecting rods (11) is fixedly connected to an upper clamping plate (12).

7. A workpiece hold-down assembly as claimed in claim 6, wherein, The bottom of the upper clamping plate (12) is equipped with several anti-slip grooves, which are adapted to the anti-slip grooves on the surface of the lower clamping plate (202).

Images