White vehicle body top cover laser welding pressing mechanism

By designing a laser welding pressing mechanism for the white body cover without cylinder control, the mechanical structure of the key unit is used to achieve the workpiece tightening, which solves the problems of high manufacturing costs and poor workpiece tightening effect in the prior art, and achieves an efficient and low-cost pressing effect.

CN222588451UActive Publication Date: 2025-03-11WUHAN DONGFENG PAINTING EQUIP CO LTD
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Patent Information

Application Number
CN202421222749.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-31
Publication Date
2025-03-11
Estimated Expiration
2034-05-31

AI Technical Summary

Technical Problem

The existing laser welding and compression mechanism of the white body cover is mostly made of a key type, and each key unit is controlled by one cylinder, resulting in robot matching with high manufacturing costs, high equipment quality requirements and greater loads. If the cylinder is reduced or the key chunk is widened, the workpiece compression effect will be poor.

Method used

A laser welding pressing mechanism for body white cover is designed, using a frame and multiple key units, each key unit including a support, a connecting block, a pressing arm and a pressing block, and pressing is achieved through a push rod, an indicator screw and an adjustment screw without cylinder control.

Benefits of technology

The workpiece is compressed without cylinder control, which reduces manufacturing costs, reduces equipment weight, and improves the workpiece compression quality.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222588451U_ABST
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Abstract

The utility model relates to a body-in-white top cover laser welding pressing mechanism which comprises a frame and key units, each key unit comprises a support, a connecting block, a pressing arm and a pressing block, the lower end of each support is hinged to one end of the lower portion of the corresponding connecting block, and the other end of the lower portion of each connecting block is fixedly connected with one end of the corresponding pressing arm; a thrust rod, an indicating screw rod and an adjusting screw rod are sequentially arranged between the support and the connecting block from top to bottom, and one end of the thrust rod penetrates through the connecting block and is connected with one end of a spring; the other end of the spring abuts against the support, and the other end of the thrust rod is provided with a locking nut. One end of the indicating screw penetrates through the connecting block and is in threaded connection with the support, and the other end is provided with an indicating block; one end of the adjusting screw rod penetrates through the connecting block and is in threaded connection with the support; the lower portion of the other end of the pressing arm is hinged to the pressing block, and the pressing arm and the pressing block are limited and fixed through a bolt. A simple and reliable mechanical structure is adopted, the workpiece can be pressed, an air cylinder is not needed, the manufacturing cost is low, and the weight is light.
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Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, in particular to a laser welding clamping mechanism for a body-in-white roof. Background Art

[0002] With the development of the automobile industry, people's requirements for the manufacturing quality of the body in white are also constantly improving. The mature development of laser welding technology has led to more and more laser welding processes for the body in white, especially in the welding of the body in white roof. Compared with traditional resistance spot welding, laser welding has the advantages of high welding quality, beautiful forming, and good sealing. However, laser welding has relatively high requirements for the overlap gap of parts. It must have a large enough clamping force to ensure the gap requirements and prevent the parts from being deformed due to overpressure.

[0003] Most of the existing mature white body top cover laser welding clamping mechanisms adopt piano key type, each key unit is controlled separately, and the flexibility of pressure matching is quite high. At present, the power of the piano key block mostly comes from the cylinder, and each key block is controlled by a cylinder. A set of clamping tooling equipment requires at least 30 cylinders, which undoubtedly increases the manufacturing cost and also increases the equipment quality, thus requiring a robot with a larger load to match it. If the cylinders are reduced and the key block is widened, the workpiece clamping effect will be poor. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a body-in-white top cover laser welding clamping mechanism, which can achieve the clamping of the workpiece without cylinder control.

[0005] The technical solution adopted by the utility model is: a laser welding clamping mechanism for a body-in-white top cover, comprising a frame and a plurality of key units arranged on both sides of the frame for clamping plates, characterized in that: each of the key units comprises a support, a connecting block, a pressing arm and a pressing block, the support is fixedly arranged on the frame, the lower end of the support is hinged with one end of the lower part of the connecting block through a first rotating shaft, and the other end of the lower part of the connecting block is fixedly connected with one end of the pressing arm; a thrust rod, an indicating screw and an adjusting screw are arranged in sequence from top to bottom between the support and the connecting block, one end of the thrust rod passes through the connecting block and is connected with one end of a spring; the other end of the spring abuts against the support, and a locking nut is arranged at the other end of the thrust rod; one end of the indicating screw passes through the connecting block and is threadedly connected to the support, and the other end is provided with an indicating block; one end of the adjusting screw passes through the connecting block and is threadedly connected to the support; the lower part of the other end of the pressing arm is hinged with the pressing block through a second rotating shaft, and the pressing arm and the pressing block are fixed by a latch limit.

[0006] Preferably, the support is a vertical plate structure, one side of which is fixedly connected to the frame by bolts, and the other side is provided with a spring guide hole, an indicator screw connecting hole and an adjustment screw connecting hole in sequence from top to bottom.

[0007] Preferably, the connecting block comprises an upper transverse portion, a lower transverse portion and a vertical portion, and the support, the upper transverse portion, the vertical portion and the lower transverse portion form a "mouth"-shaped structure.

[0008] Preferably, the upper cross part is horizontally arranged, one end of which is opposite to the support and is provided with a spring mounting hole; the other end of the upper cross part is connected to the upper end of the vertical part; one end of the thrust rod passes through the upper cross part along the spring mounting hole and is connected to one end of the spring; the spring is installed in the spring mounting hole, and the other end of the spring extends into the spring guide hole and rests on the support; the vertical part is vertically arranged and parallel to the support; an indicator screw through hole and an adjustment screw through hole are provided on the vertical part, the indicator screw passes through the indicator screw through hole and is threadedly connected to the indicator screw connecting hole, and the adjustment screw passes through the adjustment screw through hole and is threadedly connected to the adjustment screw connecting hole; the lower end of the vertical part is connected to one end of the lower cross part, and the other end of the lower cross part is hinged to the lower end of the support through a first rotating axis.

[0009] Preferably, a first adjustment pad is provided between the support and the frame.

[0010] Preferably, a second adjustment pad is provided between the connecting block and the pressure arm.

[0011] Preferably, a gasket is provided between the nut of the adjusting screw and the connecting block.

[0012] Preferably, a rotation limit block is provided between the bottom of the pressing arm and the pressing block.

[0013] Preferably, a mechanical dynamometer is provided at the top of the other end of the pressing arm.

[0014] Preferably, the connecting block is provided with scale lines matching with the indicating block.

[0015] The beneficial effects achieved by the utility model are: a simple and reliable mechanical structure is adopted to realize the pressing of the workpiece, no cylinder is required, the manufacturing cost is low and the weight is light. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 is a structural schematic diagram of a keyboard unit;

[0018] Figure 3 is a cross-sectional view of a key unit;

[0019] Figure 4 is the front view of the keyboard unit;

[0020] Figure 5 is a side view of the keyboard unit;

[0021] Figure 6-7 It is a working schematic diagram of the keyboard unit;

[0022] In the figure: 01-frame; 02-tool side gun change plate; 03-key unit; 04-safety module; 1-first adjustment pad; 2-support; 3-indicator screw; 4-adjusting screw; 5-first rotating axis; 6-spring; 7-connecting block; 71-upper horizontal part; 72-vertical part; 73-lower horizontal part; 8-locking nut; 9-thrust rod; 10-indicator block; 11-gasket; 12-second adjustment pad; 13-mechanical dynamometer; 14-lifting ring; 15-pressure block; 16-second rotating axis; 17-pressure arm; 18-rotation limit block; 19-pin hole; 20-setting screw; 21-scale line. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-7 As shown, a laser welding clamping mechanism for a body-in-white roof of the utility model comprises a frame 01, a tool-side gun-changing plate 02, a key unit 03 and a safety module 04, wherein the tool-side gun-changing plate 02 is arranged in the middle of the frame 01, and the safety module 04 is arranged at one end of the frame 01; key units 03 for clamping plates are arranged on both sides of the frame 01.

[0025] In this embodiment, each key unit 03 includes a support 2, a connecting block 7, a pressure arm 17 and a pressure block 15. The support 2 is fixedly arranged on the frame 01, and the lower end of the support 2 is hinged to one end of the lower part of the connecting block 7 through a first rotating shaft 5, and the other end of the lower part of the connecting block 7 is fixedly connected to one end of the pressure arm 17; a thrust rod 9, an indicating screw 3 and an adjusting screw 4 are arranged from top to bottom between the support 2 and the connecting block 7, one end of the thrust rod 9 passes through the connecting block 7 and is connected to one end of a spring 6; the other end of the spring 6 rests on the support 2, and a locking nut 8 is arranged at the other end of the thrust rod 9; one end of the indicating screw 3 passes through the connecting block 7 and is threadedly connected to the support 2, and the other end is provided with an indicating block 10; one end of the adjusting screw 4 passes through the connecting block 7 and is threadedly connected to the support 2; the lower part of the other end of the pressure arm 17 is hinged to the pressure block 15 through a second rotating shaft 16, and the pressure arm 17 and the pressure block 15 are fixed by a latch. There are gaps between the thrust rod 9, the indicator screw 3 and the adjusting screw 4 and the connecting block 7 to ensure that the three can rotate freely and appropriately.

[0026] In this embodiment, the support 2 is a vertical plate structure, one side of which is fixedly connected to the frame 01 by bolts, and the other side is provided with a spring guide hole, an indicating screw connection hole and an adjusting screw connection hole in sequence from top to bottom.

[0027] In this embodiment, the connecting block 7 includes an upper transverse portion 71, a lower transverse portion 73 and a vertical portion 72, and the support 2, the upper transverse portion 71, the vertical portion 72 and the lower transverse portion 73 form a "mouth"-shaped structure.

[0028] In this embodiment, the upper cross portion 71 is horizontally arranged, one end of which is opposite to the support 2 and is provided with a spring mounting hole; the other end of the upper cross portion 71 is connected to the upper end of the vertical portion 72; one end of the thrust rod 9 passes through the upper cross portion 71 along the spring mounting hole and is connected to one end of the spring 6; the spring 6 is installed in the spring mounting hole, and the other end of the spring 6 extends into the spring guide hole and rests on the support 2; the vertical portion 72 is vertically arranged and parallel to the support 2; an indicator screw through hole and an adjustment screw through hole are provided on the vertical portion 72, the indicator screw 3 passes through the indicator screw through hole and is threadedly connected to the indicator screw connecting hole, and the adjustment screw 4 passes through the adjustment screw through hole and is threadedly connected to the adjustment screw connecting hole; the lower end of the vertical portion 72 is connected to one end of the lower cross portion 73, and the other end of the lower cross portion 73 is hinged to the lower end of the support 2 through the first rotating shaft 5.

[0029] In this embodiment, a first adjustment pad 1 is provided between the support 2 and the frame 01 .

[0030] In this embodiment, a second adjustment pad 12 is provided between the connecting block 7 and the pressing arm 17 .

[0031] In this embodiment, a gasket 11 is provided between the nut of the adjusting screw rod 4 and the connecting block 7 .

[0032] In this embodiment, a rotation limiting block 18 is provided between the bottom of the pressing arm 17 and the pressing block 15 .

[0033] In this embodiment, a mechanical dynamometer 13 is provided at the top of the other end of the pressing arm 17 .

[0034] In this embodiment, the connecting block 7 is provided with a scale line 21 that matches the indicating block 10 .

[0035] When each key unit 03 is combined with the plate, a hanging ring 14 needs to be installed on the pressure arm 17, and the pin is inserted into the plug-in pin hole 19. The fit between the pressure block 15 and the plate is adjusted by increasing or decreasing the thickness of the adjustment pad 1 and the adjustment pad 12.

[0036] After the fit between the plate and the pressure block 15 is adjusted, observe whether the arrow on the indicator block 10 is horizontally pointing to the scale line 21. If not, it is necessary to rotate and adjust its position so that the arrow on the indicator block 10 is horizontally pointing to the scale line 21, and then tighten the set screw 20 to fix the position of the indicator block 10. Use a mechanical dynamometer 13 to hook the ring 14 and pull up the pressure arm 17 to obtain the required pressure value. At the same time, adjust the locking nut 8 so that the arrow of the indicator block 10 points to the appropriate scale, and finally tighten the adjustment screw 4 to stabilize the key unit 03 as a whole. When all key units 03 are adjusted and the mechanism is put into use, it is necessary to loosen all the adjustment screws 4, remove the ring 14, and pull out the pin from the plug-in pin hole 19. Each key unit can provide a clamping force within a uniform range.

[0037] In this embodiment, the indicating block 10 is assembled in the nut at the tail of the indicating screw 3. An arrow is engraved on the indicating block 10. The indicating block 10 can rotate in the nut of the indicating screw 10. A fixing screw 20 is installed in the indicating screw 3. Tightening the screw 20 fixes the position of the indicating block 10.

[0038] During adjustment, the main function of the adjusting screw 4 is to lock the connecting block 7, maintain the stability of the key unit 03, and prevent the indicating screw 3 from being stressed for a long time.

[0039] In the present invention, a rotation limit block 18 is installed at the tail end of the pressing arm 17 to increase the degree of freedom of the pressing block 15 when working, so that the pressing block 15 can better fit with the surface of the plate; at the same time, it can also prevent the pressing block 15 from rotating excessively.

[0040] It should be noted that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the utility model thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solution of the utility model is limited only by the scope of the claims.

[0041] Finally, it should be pointed out that the above embodiments are only representative examples of the present utility model. Obviously, the present utility model is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model shall be considered to belong to the protection scope of the present utility model.

Claims

1. A laser welding clamping mechanism for a body-in-white roof, comprising a frame and a plurality of key units arranged on both sides of the frame for clamping panels, characterized in that: Each of the key units includes a support, a connecting block, a pressure arm and a pressure block, the support is fixedly arranged on the frame, the lower end of the support is hinged to one end of the lower part of the connecting block through a first rotating shaft, and the other end of the lower part of the connecting block is fixedly connected to one end of the pressure arm; a thrust rod, an indicating screw and an adjusting screw are arranged in sequence from top to bottom between the support and the connecting block, one end of the thrust rod passes through the connecting block and is connected to one end of a spring; the other end of the spring rests on the support, and the other end of the thrust rod is provided with a locking nut; one end of the indicating screw passes through the connecting block and is threadedly connected to the support, and the other end is provided with an indicating block; one end of the adjusting screw passes through the connecting block and is threadedly connected to the support; the lower part of the other end of the pressure arm is hinged to the pressure block through a second rotating shaft, and the pressure arm and the pressure block are fixed by a latch.

2. The laser welding clamping mechanism for the body-in-white roof according to claim 1 is characterized in that: The support is in the form of a vertical plate structure, one side of which is fixedly connected to the frame by bolts, and the other side of which is provided with a spring guide hole, an indicating screw connecting hole and an adjusting screw connecting hole in sequence from top to bottom.

3. The laser welding clamping mechanism for the body-in-white roof according to claim 2 is characterized in that: The connecting block comprises an upper transverse portion, a lower transverse portion and a vertical portion, and the support, the upper transverse portion, the vertical portion and the lower transverse portion form a "mouth"-shaped structure.

4. The laser welding clamping mechanism for the body-in-white roof according to claim 3 is characterized in that: The upper horizontal part is arranged horizontally, one end of which is opposite to the support and is provided with a spring mounting hole; the other end of the upper horizontal part is connected to the upper end of the vertical part; one end of the thrust rod passes through the upper horizontal part along the spring mounting hole and is connected to one end of the spring; the spring is installed in the spring mounting hole, and the other end of the spring extends into the spring guide hole and rests on the support; the vertical part is arranged vertically and parallel to the support; an indicator screw through hole and an adjustment screw through hole are provided on the vertical part, the indicator screw passes through the indicator screw through hole and is threadedly connected to the indicator screw connecting hole, and the adjustment screw passes through the adjustment screw through hole and is threadedly connected to the adjustment screw connecting hole; the lower end of the vertical part is connected to one end of the lower horizontal part, and the other end of the lower horizontal part is hinged to the lower end of the support through a first rotating axis.

5. The laser welding clamping mechanism for the body-in-white roof according to claim 2 is characterized in that: A first adjustment pad is arranged between the support and the frame.

6. The laser welding clamping mechanism for the body-in-white roof according to claim 1 is characterized in that: A second adjustment pad is provided between the connecting block and the pressing arm.

7. The laser welding clamping mechanism for the body-in-white roof according to claim 1 is characterized in that: A gasket is arranged between the nut of the adjusting screw and the connecting block.

8. The laser welding clamping mechanism for the body-in-white roof according to claim 1 is characterized in that: A rotation limiting block is arranged between the bottom of the pressing arm and the pressing block.

9. The laser welding clamping mechanism for the body-in-white roof according to claim 1 is characterized in that: A mechanical dynamometer is arranged on the top of the other end of the pressing arm.

10. The laser welding clamping mechanism for the body-in-white roof according to claim 1, characterized in that: The connecting block is provided with scale lines matched with the indicating block.