High-precision welding device
By designing a high-precision welding device, using a combined structure of spiral holes and hollow parts, combined with vertical laser welding and a mold clamping mechanism driven by synchronous lifting cylinder, the problems of complex mold structure and low welding accuracy in the prior art are solved, and the stability of the metal sheet after high-precision welding and welding is achieved.
Patent Information
- Application Number
- CN202422471642.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-10-12
AI Technical Summary
In the existing laser welding technology, the mold structure is complex, making it difficult to achieve high-precision welding of metal sheets, and the metal sheet is prone to warping after welding.
A high-precision welding device is designed, including laser welding components, upper mold components and lower mold components. By setting up spiral holes and hollow parts, welding is performed using vertical lasers, and the upper and lower molds are driven close to each other by synchronous lifting cylinders to clamp the metal sheets to ensure welding accuracy and stability.
High precision welding of metal sheets is achieved. The metal sheet is not easy to warp after welding, has high welding accuracy, and the device structure is relatively simple.
Smart Images
Figure CN222932011U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of laser welding of metal sheets, in particular to a high-precision welding device. Background Art
[0002] With the rapid development of 3C electronics, precision machining, etc., it is necessary to firmly weld between two metal sheets. At present, during laser welding, the lower die remains stationary, and the fixed metal sheet strip is achieved and welded by the lifting of the upper die. When the strip needs to step, the strip is floated by a floating lifting mechanism and then stepped, and the die structure is relatively complex.
[0003] In view of this, it is necessary to develop a high-precision welding device. Summary of the Invention
[0004] To solve the above technical problems, the purpose of the utility model is to disclose a high-precision welding device.
[0005] To achieve the above invention purpose, the utility model provides a high-precision welding device, which includes a laser welding component, an upper die component and a lower die component;
[0006] The upper die component includes a first lifting cylinder, a second lifting cylinder, an upper die base, a stop plate and a stripping component;
[0007] The lower die component includes a third lifting cylinder, a lower die base, a lower backing plate and a lower template;
[0008] The laser welding component is arranged between the first lifting cylinder and the second lifting cylinder;
[0009] The metal sheet to be welded is arranged between the stripping component and the lower template, and a plurality of spiral holes are arranged on the surface of the metal sheet;
[0010] The upper die base is provided with a hollow part, and welding holes corresponding to the spiral holes are arranged on the stripping component, and the vertical laser emitted by the laser welding component passes through the hollow part and the welding holes and is aligned with the spiral holes.
[0011] Preferably, the metal sheet includes an upper sheet and a lower sheet, and the spiral holes are arranged on the surface of the upper sheet.
[0012] Preferably, the depth of the spiral holes is half of the thickness of the upper sheet.
[0013] Preferably, the stripping component includes a stripping plate and an upper template, and a plurality of welding holes are arranged on the upper template.
[0014] Preferably, a first upper convex arc surface and a second upper convex arc surface are arranged on the lower surface of the upper template.
[0015] Preferably, a third upward convex arc surface and a fourth upward convex arc surface are arranged on the upper surface of the lower template, and the first upward convex arc surface cooperates with the third upward convex arc surface, and the second upward convex arc surface cooperates with the fourth upward convex arc surface.
[0016] Preferably, first guide posts are respectively arranged at the four top corners of the upper die base, and the first guide posts penetrate through the stop plate and the stripping assembly.
[0017] Preferably, second guide posts are respectively arranged at the four top corners of the lower die base, and the second guide posts penetrate through the lower backing plate.
[0018] Preferably, the first lifting cylinder, the second lifting cylinder and the third lifting cylinder are lifted and lowered simultaneously.
[0019] Preferably, the vertical laser emitted by the laser welding assembly welds the spiral holes one by one according to a preset path.
[0020] Compared with the prior art, the technical effects of the present utility model are as follows:
[0021] The first lifting cylinder and the second lifting cylinder drive the stop plate and the stripping assembly to lift and lower. At the same time, the third lifting cylinder drives the lower backing plate and the lower template to lift and lower. The first lifting cylinder, the second lifting cylinder and the third lifting cylinder are lifted and lowered simultaneously. The metal sheet to be welded is in a suspended state in a tensioned state and is clamped. On the one hand, it is convenient for the step-by-step movement of the metal sheet to be welded. On the other hand, when the upper and lower surfaces of the metal sheet to be welded are clamped simultaneously, the welding is more stable and the welding precision is high. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0023] Figure 1 It is a schematic diagram of the metal sheet to be welded of the present utility model.
[0024] Figure 2 It is a three-dimensional structural schematic diagram of the high-precision welding device of the present utility model.
[0025] Figure 3 It is a sectional view schematic diagram of the high-precision welding device of the present utility model in the mold opening state.
[0026] Figure 4 It is a sectional view schematic diagram of the high-precision welding device of the present utility model in the mold closing state.
[0027] Figure 5 is the enlarged structural schematic diagram of part A of the present utility model Figure 4 .
[0028] Figure 6 is the schematic diagram of the cooperation principle of the upper template and the lower template of the present utility model
[0029] Figure 7 is the three-dimensional structural schematic diagram of the upper template of the present utility model
[0030] Among them, 1. Laser welding assembly; 11. Laser beam; 2. Upper die assembly; 21. First lifting cylinder; 22. Second lifting cylinder; 23. Upper die base; 231. Hollow part; 232. First guide post; 24. Stop plate; 25. Stripping assembly; 251. Welding hole; 252. Stripping plate; 253. Upper template; 2531. First upper convex arc surface; 2532. Second upper convex arc surface; 2533. Thin end; 2534. Thick end; 3. Lower die assembly; 31. Third lifting cylinder; 32. Lower die base; 321. Second guide post; 33. Lower backing plate; 34. Lower template; 341. Third upper convex arc surface; 342. Fourth upper convex arc surface; 4. Metal sheet; 41. Spiral hole Specific embodiments
[0031] The present utility model will be described in detail below in conjunction with the embodiments shown in the drawings. However, it should be noted that these embodiments are not limitations on the present utility model, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present utility model
[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model
[0033] Embodiment 1
[0034] Refer Figures 1 to 7 as shown, this embodiment discloses a specific implementation of a high-precision welding device
[0035] This embodiment provides a high-precision welding device. Refer Figures 1 to 7As shown in the figure, it includes a laser welding assembly 1, an upper die assembly 2, and a lower die assembly 3. The laser welding assembly 1 is an efficient and precise welding assembly that uses a laser beam with a high energy density as a heat source. It emits a vertical laser beam 11 downward, and the laser beam 11 irradiates the pre-welding positions one by one along a predetermined path. The upper die assembly 2 includes a first lifting cylinder 21, a second lifting cylinder 22, an upper die base 23, a stop plate 24, and a stripping assembly 25. The laser welding assembly 1 is arranged between the first lifting cylinder 21 and the second lifting cylinder 22. The lower die assembly 3 includes a third lifting cylinder 31, a lower die base 32, a lower backing plate 33, and a lower template 34. The metal sheets 4 to be welded are arranged between the stripping assembly 25 and the lower template 34. A number of spiral holes 41 are provided on the surface of the metal sheets 4. The upper die base 23 and the stop plate 24 are respectively provided with hollow parts 231, and welding holes 251 corresponding to the spiral holes 41 are provided in the stripping assembly 25. The vertical laser beam 11 emitted by the laser welding assembly 1 passes through the hollow parts 231 and the welding holes 251 and is aligned with the spiral holes 41.
[0036] Specifically, in this embodiment, refer to Figure 1 , the number of the metal sheets 4 to be welded is three pairs. Each metal sheet 4 is provided with 32 spiral holes. A total of 32×6 = 192 spiral holes 41 need to be welded one by one by laser. The metal sheets 4 to be welded include upper sheets and lower sheets. The spiral holes 41 are provided on the surface of the upper sheets. The depth of each spiral hole 41 is half of the thickness of the upper sheet. The thickness of the upper sheet is 0.1 mm, and the thickness of the lower sheet is 0.2 mm. The vertical laser beam 11 emitted by the laser welding assembly 1 welds the spiral holes 41 one by one along a preset path. Each spiral hole 41 is penetrated, and the penetration depth of the lower sheet is 0.05 mm - 0.1 mm. Welding is achieved by means of local melting.
[0037] Since each metal sheet 4 has 32 spiral holes 41 on its surface, during the laser welding process, each spiral hole 41 of the metal sheet 4 will be penetrated by the laser, resulting in a local high-temperature situation. Also, due to the different thicknesses of the upper and lower sheets of the metal sheet, the degrees of thermal expansion and contraction are different. If the metal sheet 4 is laser welded in a horizontal state, after welding, the metal sheet 4 will have a certain degree of warping. To solve this defect, the stripping assembly 25 includes a stripping plate 252 and an upper template 253. A number of welding holes 251 are provided in the upper template 253. The welding holes 251 are much larger than the spiral holes 41. The welding holes 251 are avoidance holes for the laser beam and also heat dissipation holes. At the same time, the waist-shaped welding holes 251 can expand the heat dissipation area and contribute to rapid heat dissipation. Refer to Figure 5 and Figure 6, to prevent the metal sheet 4 from warping after welding, a first upper convex arc surface 2531 and a second upper convex arc surface 2532 are provided on the lower surface of the upper template 253. The first upper convex arc surface 2531 and the second upper convex arc surface 2532 are respectively provided with a thin end 2533 and a thick end 2534. The thickness of the thin end 2533 is 1 mm - 1.3 mm, and the thickness of the thick end 2534 is 1.9 mm - 2.5 mm. The two ends of the first upper convex arc surface 2531 and the second upper convex arc surface 2532 are respectively the thin end 2533 and the thick end 2534, and the overall radian is small. A third upper convex arc surface 341 and a fourth upper convex arc surface 342 are provided on the upper surface of the lower template 34. The first upper convex arc surface 2531 cooperates with the third upper convex arc surface 341, and the second upper convex arc surface 2532 cooperates with the fourth upper convex arc surface 342. When the metal sheet 4 is clamped between the upper template 253 and the lower template 34, three metal sheets 4 on one side are clamped between the first upper convex arc surface 2531 and the third upper convex arc surface 341, and three metal sheets 4 on the other side are clamped between the second upper convex arc surface 2532 and the fourth upper convex arc surface 342, so that the three pairs of metal sheets 4 are laser welded under a very small radian. After welding, each metal sheet 4 still returns to a flat state. In addition, since the metal sheet 4 is clamped between the upper template 253 and the lower template 34 for laser welding and presents a certain radian, the upper template 253 and the lower template 34 move synchronously and approach each other to clamp. In the case where both ends of the strip are constrained, the strip where the metal sheet 4 is located can be clamped more accurately and stably. When clamping the metal sheet 4, the metal sheet 4 is slightly bent. In the traditional die that needs to suspend and lift the strip, the uneven surface of the lower template 34 will also affect the stepping of the strip, and it is difficult to bend the metal sheet with a small radian. This embodiment overcomes the defects of the traditional die and realizes precise welding by the way that the upper template 253 and the lower template 34 approach each other synchronously to clamp the metal sheet, and the metal sheet will not warp after welding.
[0038] The working principle of the upper template 253 and the lower template 34 approaching each other synchronously is as follows: Refer to Figures 2 to 4 , first guide posts 232 are respectively provided at the four top corners of the upper die base 23. The first guide posts 232 penetrate through the stop plate 24 and the stripping assembly 25. The first lifting cylinder 21 and the second lifting cylinder 22 synchronously drive the stop plate 24 and the stripping assembly 25 to lift through the first guide posts 232. Second guide posts 321 are respectively provided at the four top corners of the lower die base 32. The second guide posts 321 penetrate through the lower backing plate 33. The third lifting cylinder 31 drives the lower backing plate 33 to lift through the second guide posts 321. When the first lifting cylinder 21 and the second lifting cylinder 22 drive the stripping assembly 25 downward, and the third lifting cylinder 31 drives the lower backing plate 33 upward, the metal sheet 4 is clamped between the upper template 253 and the lower template 34. At this time, the first guide posts 232 abut against the lower backing plate 33, and the second guide posts 321 abut against the stripping plate 252.
Claims
1. High precision welding device, characterized in that, It includes a laser welding assembly, an upper mold assembly and a lower mold assembly; The upper die assembly includes a first lifting cylinder, a second lifting cylinder, an upper die seat, a stop plate and a stripping assembly; The lower die assembly comprises a third lifting cylinder, a lower die seat, a lower pad and a lower die plate; The laser welding assembly is disposed between the first lifting cylinder and the second lifting cylinder; The metal sheet to be welded is arranged between the stripping assembly and the lower template, and a plurality of spiral holes are arranged on the surface of the metal sheet; The upper die seat is provided with a hollow portion, and a welding hole corresponding to the spiral hole is provided in the stripping assembly. The vertical laser emitted by the laser welding assembly passes through the hollow portion and the welding hole and is aligned with the spiral hole.
2. The high-precision welding device according to claim 1, characterized in that: The metal sheet comprises an upper sheet and a lower sheet, and the spiral holes are arranged on the surface of the upper sheet.
3. The high-precision welding device according to claim 2, characterized in that: The depth of the spiral hole is half of the thickness of the upper sheet.
4. The high-precision welding device according to claim 1, characterized in that: The stripping assembly comprises a stripping plate and an upper template, and a plurality of welding holes are arranged on the upper template.
5. The high-precision welding device according to claim 4, characterized in that: A first upper convex arc surface and a second upper convex arc surface are arranged on the lower surface of the upper template.
6. The high-precision welding device according to claim 5, characterized in that: A third upper convex arc surface and a fourth upper convex arc surface are arranged on the upper surface of the lower template, the first upper convex arc surface cooperates with the third upper convex arc surface, and the second upper convex arc surface cooperates with the fourth upper convex arc surface.
7. The high-precision welding device according to any one of claims 1 to 6, characterized in that: First guide pillars are respectively arranged at the four top corners of the upper die seat, and the first guide pillars penetrate the stop plate and the stripping assembly.
8. The high-precision welding device according to any one of claims 1 to 6, characterized in that: Second guide pillars are respectively arranged at the four top corners of the lower die base, and the second guide pillars penetrate the lower pad.
9. The high-precision welding device according to any one of claims 1 to 6, characterized in that: The first lifting cylinder, the second lifting cylinder and the third lifting cylinder are lifted and lowered simultaneously.
10. The high-precision welding device according to any one of claims 1 to 6, characterized in that: The vertical laser emitted by the laser welding assembly welds the spiral holes one by one along a preset path.