Assembly welding jig and assembly welding device
The component welding fixture design with elastic support and guide limit solves the deformation problem caused by the inability of fixed fixtures to release stress, realizes component stability and consistency during the welding process, and improves product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI SIEMENS CIRCUIT PROTECTION SYST
- Filing Date
- 2026-04-20
- Publication Date
- 2026-07-21
AI Technical Summary
Existing fixed welding fixtures cannot effectively release the stress of the moving contact assembly during the welding process, resulting in deformation and misalignment of non-welded parts, affecting welding consistency and product quality.
The component welding fixture with elastic support uses the second fixture 32 to elastically support the first fixture 31, converting the force of the non-welding part into elastic force, avoiding deformation and misalignment of the component due to force during the welding process. The guide shaft 35 is used to limit the movement direction of the fixture, and the fixing member 33 is used to limit the compression range of the elastic member 34 to ensure the stability of the fixture.
It improves the quality of components during the welding process, avoids deformation and misalignment caused by stress concentration, and enhances welding consistency and product yield.
Smart Images
Figure CN224526207U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding fixture technology, and in particular to a component welding fixture and a component welding device. Background Technology
[0002] In the resistance welding process of circuit breaker components, the welding of the moving contact assembly (composed of the moving contact and the contact connecting piece) to the flexible conductor is one of the key steps. Currently, fixed welding fixtures are commonly used. These fixtures use a rigid structure to support or limit the moving contact assembly, ensuring its accurate positioning before welding and preventing shaking during welding. During welding, pressure is applied from top to bottom by pressing down the upper electrode, and current is applied, causing the moving contact and flexible conductor to form a weld point at the contact area. However, because the fixture is a rigid fixed structure, the welding pressure is directly transmitted through the moving contact assembly to its internal moving contact shaft and contact connecting piece, causing the non-welded parts to bear additional mechanical and thermal stress. This stress concentration can easily cause relative displacement between the moving contact shaft and the contact connecting piece, localized plastic deformation, and even loosening or cracking of the original weld point, leading to dimensional deviations and component failure. Such defects not only increase product rework and component scrap rates but may also allow substandard products to enter the market, causing serious quality accidents such as power outages, phase loss, or equipment damage on the customer side. Utility Model Content
[0003] In the aforementioned technologies, because fixed fixtures cannot achieve dynamic compensation under welding pressure, the moving contact assembly is forced into rigid coupling with the fixture when under pressure, and its internal stress cannot be effectively released, making it difficult to control the thermo-mechanical coupling deformation during the welding process. Especially in mass production, poor weld consistency and large fluctuations in defect rate seriously affect product quality stability and manufacturing yield.
[0004] This utility model provides a component welding fixture and a component welding device to at least solve the technical problem that the component quality deteriorates due to stress on non-welded parts during the welding process.
[0005] According to one aspect of the present invention, a component welding fixture is provided, comprising: a first fixture 31 for supporting and positioning a component 1 to be welded, the component 1 including a weldable portion and a non-welded portion, the first fixture 31 contacting the non-welded portion during welding, the weldable portion and the non-welded portion being connected via one or more parts in the component 1; and a second fixture 32 located in a first direction of the first fixture 31 and elastically supporting the first fixture 31 toward a second direction, the first direction and the second direction being opposite directions, the first fixture 31 being able to move toward the first direction under pressure applied toward the first direction by a welding actuator transmitted via the component 1 during welding, and moving toward the second direction after welding is completed via the elastic support of the second fixture 32 toward the second direction, the welding actuator being used to weld the weldable portion of the component 1.
[0006] In this way, the component welding fixture provided in this application embodiment can elastically support the first fixture 31 through the second fixture 32. During the welding process, the force acting on the non-welded part can be converted into elasticity, so that the first fixture 31 moves downward to release the force on the non-welded part, thereby preventing the parts in the component 1 from deforming and misaligning due to the force during the welding process, thereby improving the quality of the component 1.
[0007] Furthermore, the component welding fixture also has an elastic element 34, the two ends of which abut against the first fixture 31 and the second fixture 32 respectively, and the second fixture 32 elastically supports the first fixture 31 via the elastic element 34.
[0008] In this way, the component welding fixture provided in this application embodiment can elastically support the first fixture 31 through the elastic element 34, thereby avoiding stress on the non-welded parts of the component during the welding process.
[0009] Furthermore, the second clamp 32 is provided with a guide shaft 35 extending in the second direction, and the first clamp 31 is sleeved on the guide shaft 35. The guide shaft 35 is used to move the first clamp 31 along the axial direction of the guide shaft 35.
[0010] Furthermore, the elastic element 34 is fitted around the outer periphery of the guide shaft 35.
[0011] In this way, the component welding fixture provided in this application embodiment, by setting the guide shaft 35 so that the first fixture 31 can only move along the axial direction of the guide shaft 35, can avoid the first fixture 31 from being displaced in other directions during the welding process, which would cause the component 1 to be subjected to forces in other directions, thereby improving the quality of the component 1.
[0012] Furthermore, the component welding fixture also includes a first fixing member 33, which passes through the first fixture 31 along a first direction and is fixed to the second fixture 32. The axial position of the first fixing member 33 is used to limit the compression range of the elastic member 34.
[0013] Furthermore, the elastic element 34 is fitted around the outer periphery of the first fixing element 33.
[0014] In this way, the component welding fixture provided in this application embodiment can limit the compression range of the elastic member 34 by setting the first fixing member 33, so that the elastic member 34 provides suitable elastic support for the first fixture 31, thereby avoiding deformation and misalignment of the moving contact 12 and the moving contact shaft 14 due to force during the welding process.
[0015] Furthermore, the component welding fixture also includes a fixed connecting block 43 and a second fixing member 44, the second fixing member 44 being used to fix the second fixture 32 to the fixed connecting block 43.
[0016] In this way, the component welding fixture provided in this application embodiment fixes the second fixture 32 to the fixed connecting block 43 by using the second fixing member 44, so that the second fixture 32 will not move relative to the welding actuator during the welding process, thus avoiding the displacement of the welding part caused by the movement of the moving contact component relative to the welding actuator.
[0017] According to one aspect of the present invention, a component welding apparatus is provided, comprising: a component welding fixture of any of the above; and a welding execution mechanism for welding a welding portion of a component 1 to be welded, wherein the welding execution mechanism applies pressure to the welding portion of the component 1 in a first direction during the welding process.
[0018] Furthermore, the welding actuator includes a first electrode 41, which is located in a second direction of the component 1 during the welding process and applies pressure to the welded portion of the component 1 in a first direction.
[0019] Furthermore, the welding actuator also includes a second electrode 42, which is located in the first direction of the component 1 during the welding process and is always in contact with the welding part of the component 1. The first electrode 41 and the second electrode 42 are arranged opposite to each other, and the first electrode 41 and the second electrode 42 apply current to the welding part of the component 1 during the welding process.
[0020] In this way, the component welding apparatus provided in this application embodiment, by forming a welding execution mechanism with a first electrode 41 and a second electrode 42, can apply downward pressure to the welding part. The first clamp 31 is elastically supported by the second clamp 32. During the welding process, the force acting on the non-welding part can be converted into elasticity, so that the first clamp 31 moves downward to release the force on the non-welding part, thereby preventing the parts in the component 1 from deforming and misaligning due to force during the welding process, thereby improving the quality of the component 1.
[0021] Furthermore, component 1 is a moving contact assembly, which includes a moving contact 12, a moving contact shaft 14, and a moving contact connecting piece 11. The moving contact connecting piece 11 connects the moving contact 12 and the moving contact connecting piece 11. The first clamp 31 contacts the moving contact shaft 14 during the welding process. The welding actuator applies pressure to the moving contact 12 in a first direction during the welding process. The first clamp 31 can move in the first direction due to the pressure applied in the first direction by the welding actuator via the moving contact connecting piece 11 during the welding process.
[0022] In this way, the component welding fixture provided in this application embodiment can elastically support the first fixture 31 through the second fixture 32. During the welding process, the force acting on the non-welded part can be converted into elasticity, so that the first fixture 31 moves downward to release the force on the non-welded part, avoid the moving contact shaft 14 in the moving contact assembly from being stressed during the welding process, and avoid scrapping, rework and customer complaints caused by welding size deformation and detachment of the moving contact 12 and the moving contact support 13. Attached Figure Description
[0023] Figure 1 This is a side view of a moving contact assembly with welded wires.
[0024] Figure 2 This is a side view of a moving contact assembly being welded using an optional component welding device according to an embodiment of the present invention.
[0025] Explanation of reference numerals in the attached figures
[0026] 1: Component; 2: Wire; 11: Moving contact connecting piece; 12: Moving contact; 13: Moving contact support; 14: Moving contact shaft; 31: First clamp; 32: Second clamp; 33: First fixing member; 34: Elastic member; 35: Guide shaft; 41: First electrode; 42: Second electrode; 43: Fixed connecting block; 44: Second fixing member. Detailed Implementation
[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0029] In this application, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this application.
[0030] To address the aforementioned technical problems, this application provides a component welding fixture for supporting and positioning component 1 during the welding process. The following description uses component 1 as a moving contact component.
[0031] Figure 1 This is a side view of a moving contact assembly with soldered wires. (Example) Figure 1 As shown, the moving contact assembly includes a moving contact connecting piece 11, a moving contact 12, a moving contact support 13, and a moving contact shaft 14. It should be noted that the moving contact assembly may include multiple moving contact shafts; here, all moving contact shafts in the moving contact assembly are collectively referred to as moving contact shaft 14. One end of the moving contact connecting piece 11 is welded and fixed to the moving contact 12, and the other end is fixed to the moving contact support 13 via the moving contact shaft 14. The moving contact shaft 14 vertically penetrates and protrudes from the side of the moving contact support 13.
[0032] During the process of welding the wire 2 to the moving contact assembly, the welding actuator needs to apply pressure to the welding part, that is, the part where the wire 2 contacts the moving contact 12. This pressure is transmitted to the fixture supporting the moving contact assembly via the moving contact connecting piece 11.
[0033] The welding actuator is used to weld the welding portion (moving contact 12) of component 1. To improve the welding effect, the welding actuator applies pressure and heat to the welding portion during the welding process. During welding, the welding actuator applies downward pressure to the welding portion and applies heat to it. It should be noted that the embodiments of this application are not limited to applying downward pressure to the welding portion; upward pressure may also be applied, or both upward and downward pressure may be applied simultaneously.
[0034] Figure 2 This is a side view of a component welding apparatus according to an embodiment of the present invention, during the welding of a component. Component 1 is used as an example of a moving contact component. The component welding apparatus includes a component welding fixture and a welding execution mechanism.
[0035] The component welding fixture has a first fixture 31 and a second fixture 32.
[0036] The first clamp 31 is used to support and position the component 1 to be welded. Component 1 includes a welded portion and a non-welded portion. The first clamp 31 contacts the non-welded portion during the welding process. The welded portion and the non-welded portion are connected via one or more parts in component 1. As described above, during the welding of the moving contact assembly, the wire 2 needs to be welded to the moving contact 12. That is, when component 1 is a moving contact assembly, the welded portion of component 1 is located at the moving contact 12, and the non-welded portion can be the moving contact shaft 14. It should be noted that the shape of the first clamp 31 is not specifically limited, as long as it can support and position the component 1 to be welded. For example, it can be like... Figure 2 As shown, by setting a groove slightly larger than the diameter of the moving contact shaft 14, the first clamp 31 is engaged with the moving contact assembly.
[0037] The second clamp 32 is located below the first clamp 31 and elastically supports the first clamp 31 upwards. For example, the second clamp 32 is located directly below the first clamp 31, and the upper surface of the second clamp 32 is parallel to the lower surface of the first clamp 31. The elastic support of the first clamp 31 by the second clamp 32 itself being partially or entirely elastic, or by additionally providing elastic elements, can be achieved. The following explanation focuses on the method of providing elastic elements.
[0038] The second clamp 32 can elastically support the first clamp 31 through an elastic element 34 disposed between the first clamp 31 and the second clamp 32. The elastic element 34 can be, for example, a spring, with its two ends abutting against the first clamp 31 and the second clamp 32 respectively. It should be noted that the shape of the second clamp 32 is not specifically limited, as long as it can elastically support the first clamp 31.
[0039] With the above structure, during the welding process, the first electrode 41 applies downward pressure to the welding part. This pressure acts on the moving contact 12 and is transmitted to the moving contact shaft 14 via the moving contact connecting piece 11, thereby transmitting it to the first clamp 31 and generating a downward force on the first clamp 31. Since the first clamp 31 is elastically supported, it can move downward under pressure. After welding is completed, the first electrode 41 stops applying downward pressure, and the first clamp 31 moves upward under the upward force exerted on it by the second clamp 32.
[0040] The component welding fixture provided in this application embodiment elastically supports the first fixture 31 through the second fixture 32. During the welding process, the force acting on the non-welded part can be converted into elasticity, so that the first fixture 31 moves downward to release the force on the non-welded part, thereby preventing the parts in the component 1 from deforming and misaligning due to the force during the welding process, thereby improving the quality of the component 1.
[0041] In addition, since the first clamp 31 can move downwards, it can fit closely to component 1 during clamp adjustment, resulting in better positioning.
[0042] In one embodiment of this application, the second clamp 32 may further be provided with an upwardly extending guide shaft 35, which may be cylindrical. The first clamp 31 is provided with a guide hole in the vertical direction that matches the guide shaft 35. The lower end of the guide shaft 35 is fixed to the second clamp 32, and the upper end of the guide shaft 35 is nested in the guide hole of the first clamp 31, so that the first clamp 31 can only move along the axial direction of the guide shaft 35, that is, move up and down.
[0043] It is worth mentioning that when an elastic element 34 is provided between the first clamp 31 and the second clamp 32, the elastic element 34 can be sleeved on the outer periphery of the guide shaft 35.
[0044] The component welding fixture provided in this application embodiment, by setting a guide shaft 35 so that the first fixture 31 can only move along the axial direction of the guide shaft 35, can avoid the first fixture 31 from being displaced in other directions during the welding process, which would cause the component 1 to be subjected to forces in other directions, thereby improving the quality of the component 1.
[0045] In one embodiment of this application, the component welding fixture may further include a first fixing member 33, which is used to define the compression range of the elastic member 34. Figure 2 As shown, the first fixing member 33 is used as a screw. The screw passes downward through the first clamp 31 and screws into the second clamp 32. Its upper end abuts against the upper surface of the first clamp 31, thus limiting the upward movement range of the first clamp 31. The first clamp 31 can move vertically along the first fixing member 33. Since the lower surface of the first clamp 31 abuts against the upper end of the elastic member 34, the first fixing member 33 can limit the compression range of the elastic member 34.
[0046] It is worth mentioning that when an elastic member 34 is provided between the first clamp 31 and the second clamp 32, the elastic member 34 can be sleeved on the outer periphery of the first fixing member 33.
[0047] The component welding fixture provided in this application embodiment can limit the compression range of the elastic member 34 by setting the first fixing member 33, so that the elastic member 34 provides suitable elastic support for the first fixture 31, thereby avoiding deformation and misalignment of the moving contact 12 and the moving contact shaft 14 due to force during the welding process.
[0048] In one embodiment of this application, the component welding fixture further includes a fixed connecting block 43 and a second fixing member 44. The fixed connecting block 43 is connected to the welding device, and the second fixing member 44 is used to fix the second clamp 32 to the fixed connecting block 43. The welding device includes a welding execution mechanism, that is, the fixed connecting block 43 is fixed relative to the welding execution mechanism. In other words, the second clamp 32 is fixed relative to the welding execution mechanism, so that the second clamp 32 will not move relative to the welding execution mechanism during the welding process, avoiding the displacement of the welded part caused by the movement of the moving contact assembly relative to the welding execution mechanism.
[0049] In one embodiment of this application, the welding actuator may include a first electrode 41 and a second electrode 42, which are positioned vertically opposite each other across the welding portion during the welding process. During welding, the first electrode 41 applies downward pressure to the welding portion and transmits current through the first electrode 41 and the second electrode 42 to apply heat to the welding portion. It should be noted that the embodiments of this application are not limited to the first electrode 41 applying downward pressure to the welding portion; the second electrode 42 may also apply upward pressure to the welding portion, or the first electrode 41 and the second electrode 42 may simultaneously apply opposing pressures to the welding portion. Furthermore, while this application uses the first electrode 41 and the second electrode 42 to form the welding actuator to apply heat to the welding portion, it is not limited to this; any method capable of applying heat to the welding portion is acceptable, such as heat conduction.
[0050] The component welding apparatus provided in this application embodiment, by forming a welding execution mechanism consisting of a first electrode 41 and a second electrode 42, can apply downward pressure to the welding part. The first clamp 31 is elastically supported by the second clamp 32. During the welding process, the force acting on the non-welding part can be converted into elasticity, so that the first clamp 31 moves downward to release the force on the non-welding part, thereby preventing the parts in the component 1 from deforming and misaligning due to the force during the welding process, thereby improving the quality of the component 1.
[0051] It should be noted that although this application describes the welding of a moving contact assembly, the assembly welding fixture of this application is applicable to all welding stations that require reliable positioning of parts and prevention of deformation during welding. Although this application describes the welding actuator applying downward pressure to assembly 1, the welding actuator can also apply upward pressure to assembly 1, and the specific situation can be adapted according to the above embodiments.
Claims
1. A component welding fixture, characterized in that, The component welding fixture includes: A first clamp (31) is used to support and position a component (1) to be welded, the component (1) including a welded portion and a non-welded portion, the first clamp (31) contacting the non-welded portion during the welding process, the welded portion and the non-welded portion being connected via one or more parts in the component (1); as well as The second clamp (32) is located in a first direction of the first clamp (31) and elastically supports the first clamp (31) in a second direction, wherein the first direction and the second direction are opposite. The first clamp (31) is able to move in the first direction during the welding process by pressure applied in the first direction by the welding actuator transmitted via the component (1), and move in the second direction after welding by elastic support in the second direction via the second clamp (32), the welding actuator being used to weld the welding portion of the component (1).
2. The component welding fixture according to claim 1, characterized in that, The component welding fixture also includes an elastic element (34), the two ends of which abut against the first fixture (31) and the second fixture (32) respectively, and the second fixture (32) elastically supports the first fixture (31) via the elastic element (34).
3. The component welding fixture according to claim 2, characterized in that, The second clamp (32) is provided with a guide shaft (35) extending along the second direction, and the first clamp (31) is sleeved on the guide shaft (35). The guide shaft (35) is used to move the first clamp (31) along the axial direction of the guide shaft (35).
4. The component welding fixture according to claim 3, characterized in that, The elastic element (34) is sleeved on the outer periphery of the guide shaft (35).
5. The component welding fixture according to claim 2, characterized in that, The component welding fixture also includes a first fixing member (33), which passes through the first fixture (31) along the first direction and is fixed to the second fixture (32). The head of the first direction end of the first fixing member (33) stops on the first direction side of the first fixture (31), thereby limiting the compression range of the elastic member (34) by the axial position of the first fixing member (33).
6. The component welding fixture according to claim 5, characterized in that, The elastic element (34) is sleeved on the outer periphery of the first fixing element (33).
7. The component welding fixture according to claim 1, characterized in that, The component welding fixture also includes a fixed connecting block (43) and a second fixing member (44), the second fixing member (44) being used to fix the second fixture (32) to the fixed connecting block (43).
8. A component welding apparatus, characterized in that, The component welding apparatus includes: The component welding fixture according to any one of claims 1 to 7; and The welding actuator performs welding on the welding parts of the component (1) to be welded. The welding actuator applies pressure to the welded portion of the component (1) in a first direction during the welding process.
9. The component welding apparatus according to claim 8, characterized in that, The welding actuator includes a first electrode (41) which is located in a second direction of the component (1) during the welding process and applies pressure to the welded portion of the component (1) toward the first direction.
10. The component welding apparatus according to claim 9, characterized in that, The welding actuator further includes a second electrode (42), which is located in a first direction of the component (1) during the welding process and is always in contact with the welding part of the component (1). The first electrode (41) and the second electrode (42) are arranged opposite to each other, and the first electrode (41) and the second electrode (42) apply current to the welding part of the component (1) during the welding process.