Product centering marking device capable of reducing tolerance influence
By using spring components in the clamping device for automotive parts, the problem of inaccurate center position is solved, the clamping accuracy and consistency are improved, and it is suitable for various processes.
Patent Information
- Application Number
- CN202420709093.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-08
AI Technical Summary
When clamping, the center position of long strip automotive parts is inaccurate due to fluctuations in length tolerance, and accuracy and consistency cannot be guaranteed.
Design an automatic centering device including a left positioning mechanism, a right positioning mechanism, a punching mechanism and a clamping mechanism, and use the preloading force of the spring components on both sides to ensure that the workpiece is centered after clamping, thereby improving the accuracy of punching or marking. .
Regardless of the length of the parts fluctuates, the device can maintain the consistency of the central position of the workpiece, improve symmetry accuracy and punching accuracy, and is suitable for machine addition, inspection, welding, stamping and other processes.
Smart Images
Figure CN222307034U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of auxiliary equipment for automobile parts processing, in particular to a product centering marking device which can reduce the influence of tolerance. Background Art
[0002] With the development of the automobile industry and the improvement of people's requirements for automobile quality, high-precision parts processing has become the main technical requirement of the automobile parts market. At present, most long strip parts such as automobile front anti-collision beams and door sills are bilaterally symmetrical. In order to ensure the symmetry of parts, the parts will use the center line of the product as the main positioning reference to process the rest of the position, or directly process the main positioning hole on the center of the part. No matter which method is used, the clamping position of the product must be centered. Therefore, a stable centering device is an important guarantee for the processing accuracy of the product.
[0003] At present, the commonly used centering method for long strip parts generally adopts a section to set a reference block, push one end of the part into the reference block, and use cylinders and other actuators to drive the center positioning block for movable positioning at the other end. This can meet the needs of product loading on the one hand, and offset the influence of inaccurate limit caused by product length fluctuation on the other hand. However, the current positioning method has the following problems: there are fluctuations in the length tolerance of long strip parts when they are incoming. If the length of the product is longer or shorter than the theoretical length, this method can still ensure that the product is limited in the length direction, but it cannot ensure the center positioning of the product after clamping. The center position of the product will change with the fluctuation of the actual incoming length of the product, and the accuracy and consistency of its center positioning position cannot be guaranteed.
[0004] In view of the above problems, this patent develops an automatic centering device to solve the problem of inaccurate clamping centering position caused by fluctuations in the length of incoming product parts. Summary of the invention
[0005] The utility model provides a product centering marking device which can reduce the influence of tolerance and can avoid the problem of inaccurate centering caused by tolerance.
[0006] The utility model solves the above technical problems through the following technical solutions:
[0007] A product centering marking device capable of reducing the influence of tolerance comprises a workbench, a left positioning mechanism, a right positioning mechanism, a punching mechanism and a clamping mechanism, wherein the left positioning mechanism and the right positioning mechanism are symmetrically arranged on the workbench, respectively, the clamping mechanism is fixed on the workbench, the punching mechanism is arranged on the side between the left positioning mechanism and the right positioning mechanism, the left positioning mechanism and the right positioning mechanism are both provided with a base, a top plate and a spring assembly, the base is fixed on the workbench, one side of the spring assembly is connected to the base, and the other end pushes the top plate toward the middle.
[0008] The above-mentioned product centering marking device that can reduce the influence of tolerance, the spring assembly of the left positioning mechanism includes a mounting plate, a push plate, a spring, a stopper and a mounting column, the bottom of the mounting plate is fixed to the base on the left side, four mounting columns are provided on the mounting plate, and a through hole is provided on the mounting plate, one end of the mounting column is connected to the push plate, and the other end is connected to the stopper after passing through the through hole, the spring is sleeved outside the mounting column, and the top plate is fixed to the push plate.
[0009] The above-mentioned product centering marking device that can reduce the influence of tolerance, the right positioning mechanism also includes a feed cylinder, a pull rod and a limit plate, the feed cylinder is fixed on the workbench, the cylinder rod of the feed cylinder is connected to the mounting plate, and the limit plate is fixed on the workbench and is arranged on the left side of the right mounting plate.
[0010] In the above-mentioned product centering marking device capable of reducing the influence of tolerance, the punching operation position of the punching mechanism is arranged at the midpoint of the distance between the left mounting plate and the right mounting plate close to the base.
[0011] Compared with the prior art, the utility model aims to solve the problem of inaccurate centering of long strip products by adding elastic components and using the preload of springs on both sides to ensure that the workpiece can be centered after clamping regardless of whether the length of the product fluctuates, thereby improving the accuracy of centering punching or marking, and further improving the symmetry accuracy of the product. It can be applied to clamping and positioning in machining, testing, welding, stamping and other processes. The patent has a simple structure, low cost and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the utility model;
[0013] Figure 2 It is a schematic diagram of the left positioning mechanism and the right positioning mechanism of the utility model;
[0014] Figure 3 It is a structural schematic diagram of the right positioning mechanism of the utility model;
[0015] The marks in the accompanying drawings indicate: 1. workbench, 2. left positioning mechanism, 3. right positioning mechanism, 4. punching mechanism, 5. clamping mechanism, 6. base, 7. top plate, 8. spring assembly, 9. mounting plate, 10. push plate, 11. spring, 12. stopper, 13. mounting column, 14. feed cylinder, 16. limit plate. DETAILED DESCRIPTION
[0016] The following is a further detailed description of the specific implementation of the utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the utility model.
[0017] like Figures 1 to 3 The utility model includes a workbench 1, a left positioning mechanism 2, a right positioning mechanism 3, a punching mechanism 4 and a clamping mechanism 5. The left positioning mechanism 2 and the right positioning mechanism 3 are symmetrically arranged on the workbench 1, the clamping mechanism 5 is fixed on the workbench 1, the punching mechanism 4 is arranged on the side between the left positioning mechanism 2 and the right positioning mechanism 3, the left positioning mechanism 2 and the right positioning mechanism 3 are provided with a base 6, a top plate 7 and a spring 11 assembly 8, the base 6 is fixed on the workbench 1, one side of the spring 11 assembly 8 is connected to the base 6, and the other end pushes the top plate 7 toward the middle. When working, the workpiece is clamped between the left positioning mechanism 2 and the right positioning mechanism 3, and then the spring 11 assembly 8 on both sides presses the top plate 7, the top plate 7 clamps the workpiece in the middle, and then the clamping mechanism 5 clamps the workpiece to fix it, and finally the punching mechanism 4 can punch the middle of the workpiece. Since the position of the base 6 remains unchanged, the elasticity of the spring 11 assemblies 8 on the left and right sides is the same, so that after the workpieces of different lengths are clamped between the top plates 7, their center positions will not change, thereby meeting the consistency of the center positions of workpieces of different lengths within the tolerance range, and ensuring the consistency and accuracy of the punching mechanism 4 in punching the center reference hole.
[0018] The spring 11 assembly 8 of the left positioning mechanism 2 includes a mounting plate 9, a push plate 10, a spring 11, a stopper 12 and a mounting column 13. The bottom of the mounting plate 9 is fixed on the base 6 on the left side. Four mounting columns 13 are provided at the four corners of the mounting plate 9. A through hole is provided on the mounting plate 9. One end of the mounting column 13 is connected to the push plate 10, and the other end is connected to the stopper 12 after passing through the through hole. The stopper 12 ensures that the mounting column 13 always slides in the through hole. The spring 11 is sleeved outside the mounting column 13, and the top plate 7 is fixed on the push plate 10. In this way, the spring 11 can be ensured to stably press the push plate 10, and the stability of the push plate 10 pushing the top plate 7 can be ensured, so that the top plate 7 can move stably left and right to avoid deviation, thereby improving the stability of clamping the workpiece.
[0019] The right positioning mechanism 3 also includes a feed cylinder 14 and a limit plate 16. The feed cylinder 14 is fixed on the workbench 1. The cylinder rod of the feed cylinder 14 is connected to the mounting plate 9. The limit plate 16 is fixed on the base 6 and is arranged on the left side of the right mounting plate 9. The position of the limit plate 16 is a fixed reference position. The feed cylinder 14 contracts before loading the workpiece, and then the workpiece is placed between the left and right top plates 7. The feed cylinder 14 pushes the mounting plate 9 to the position of the limit plate 16, indicating that the clamping is in place, and then the clamping mechanism 5 and the punching mechanism 4 can work. The punching operation position of the punching mechanism 4 is set at the midpoint of the distance between the left mounting plate 9 and the right mounting plate 9 when it is close to the base 6. The stability of the centering is guaranteed.
[0020] The spring 11 assembly 8 is connected to the top plate 7 to achieve elastic positioning, and the preload force of the springs 11 on both sides is adjusted to be the same, so as to complete the compensation for the length fluctuation of the workpiece, that is, regardless of the positive or negative fluctuation of the workpiece length, the workpiece can be clamped in the center, thereby eliminating the influence of the length tolerance fluctuation on the symmetry accuracy of the finished part.
[0021] The method of fixed elastic positioning on one side and movable elastic positioning on the other side is adopted to ensure that there is enough space when loading, ensuring smooth loading and unloading. At the same time, a limit plate 16 is set to ensure that after the loading is completed, the movable elastic positioning position is unique, so that the stability of the centering position of the spring 11 component 8 is guaranteed while completing the loading and unloading space. The structure is simple and reliable.
[0022] During operation, the air cylinder 14 contracts before loading the workpiece, and then the workpiece is placed between the left and right top plates 7. The air cylinder 14 pushes the mounting plate 9 to the position of the limit plate 16. Since the spring 11 components 8 are arranged on the left and right sides, the forces acting on the left and right sides of the workpiece are consistent, and the compression amount of the spring 11 is consistent. Workpieces of different lengths within the tolerance range can be located in the middle of the two mounting plates 9, and then the clamping mechanism 5 and the punching mechanism 4 can work.
[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A product centering marking device capable of reducing the influence of tolerance, characterized in that: The invention comprises a workbench (1), a left positioning mechanism (2), a right positioning mechanism (3), a punching mechanism (4) and a clamping mechanism (5), wherein the left positioning mechanism (2) and the right positioning mechanism (3) are symmetrically arranged on the workbench (1), respectively, the clamping mechanism (5) is fixed on the workbench (1), the punching mechanism (4) is arranged on the side between the left positioning mechanism (2) and the right positioning mechanism (3), the left positioning mechanism (2) and the right positioning mechanism (3) are both provided with a base (6), a top plate (7) and a spring (11) assembly (8), the base (6) is fixed on the workbench (1), one side of the spring (11) assembly (8) is connected to the base (6), and the other end pushes the top plate (7) toward the middle.
2. The product centering marking device capable of reducing the influence of tolerance according to claim 1, characterized in that: The spring (11) assembly (8) of the left positioning mechanism (2) comprises a mounting plate (9), a push plate (10), a spring (11), a stopper (12) and a mounting column (13); the bottom of the mounting plate (9) is fixed to the base (6) on the left side; a through hole is provided on the mounting plate (9); one end of the mounting column (13) is connected to the push plate (10) and the other end is connected to the stopper (12) after passing through the through hole; the spring (11) is sleeved outside the mounting column (13); and the top plate (7) is fixed to the push plate (10).
3. The product centering marking device capable of reducing the influence of tolerance as claimed in claim 2, characterized in that: The right positioning mechanism (3) further comprises a feed cylinder (14) and a limit plate (16); the feed cylinder (14) is fixed on the workbench (1); a cylinder rod of the feed cylinder (14) is connected to the mounting plate (9); and the limit plate (16) is fixed on the workbench (1) and is arranged on the left side of the right mounting plate (9).
4. The product centering marking device capable of reducing the influence of tolerance as claimed in claim 3, characterized in that: The punching operation position of the punching mechanism (4) is arranged at the midpoint of the distance between the left mounting plate (9) and the right mounting plate (9) close to the base (6).