Welding assembly and welding equipment
By combining flexible conductive blocks and pressure bars, the problem of traditional resistance welding equipment being unable to weld inside the Dewar shell is solved, achieving efficient welding and eliminating weld spots, thus improving the appearance and quality of Dewar products.
Patent Information
- Application Number
- CN202423021857.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Traditional resistance welding equipment cannot meet the welding requirements of Dewar products, especially in terms of effective welding inside the Dewar shell. Furthermore, weld spots are easily formed during the welding process, affecting the product's appearance and quality.
The system employs a combination structure of a flexible conductive block, a first electrode, a pressure rod, and a second electrode. The flexible conductive block contacts the outer shell, and the pressure rod extends into the inner shell to press against the internal components. Welding is achieved by generating contact resistance heat through a large current, and the flexible conductive block increases the contact area and reduces weld spots.
It improves the feasibility of internal welding of Dewar products, reduces weld spots, enhances product appearance quality, avoids scratches on the outer shell, and meets welding quality requirements.
Smart Images
Figure CN223642953U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of welding equipment, in particular to a welding assembly and welding equipment. BACKGROUND
[0002] The Dewar structure is an important component of a refrigeration infrared detector, and the Dewar structure maintains a low-temperature working environment required by the detector through vacuum heat insulation design.
[0003] In the related art, resistance welding needs to be used for welding of key components of the Dewar structure to ensure welding efficiency and product quality. The resistance welding equipment used on the market usually vertically arranges upper and lower electrodes to pressurize welding of the components, however, the traditional upper and lower electrodes cannot reach the inside of the Dewar shell for spot welding, which has limitations in application, and in the resistance welding process, a large amount of Joule heat is generated due to heating and melting of the welding area, which causes obvious welding spots on the surface of the Dewar shell. These welding spots may present as protrusions, depressions, discoloration or burning, which not only destroys the original aesthetics of the workpiece, but also becomes a quality defect of the Dewar product.
[0004] Therefore, how to avoid that the traditional resistance welding equipment cannot meet the welding requirements of the Dewar product is a technical problem to be solved by those skilled in the art at present. CONTENT OF THE INVENTION
[0005] The purpose of the present application is to provide a welding assembly and welding equipment, which solve the problem that the traditional resistance welding equipment cannot meet the welding requirements of the Dewar product.
[0006] To achieve the above-mentioned purpose, the present application provides a welding assembly for welding an internal component in a shell, comprising:
[0007] A flexible conductive block is used to contact the shell in which the internal component is built-in to eliminate welding spots during welding.
[0008] A first electrode is arranged along a first direction and connected to the flexible conductive block, and is used to connect a power supply of a welding equipment.
[0009] A pressing rod is arranged along a second direction perpendicular to the first direction, and is used to extend into the shell and press the internal component.
[0010] A second electrode is arranged along the first direction and is located away from the first electrode, and is connected to the pressing rod, and is used to connect the power supply of the welding equipment.
[0011] In some embodiments, the welding assembly further comprises a support for supporting the shell in which the internal component is built-in.
[0012] The support is provided with a recess for placing the shell and a avoiding groove for avoiding the pin on the shell.
[0013] In some embodiments, the support is provided with a first mounting hole, the first mounting hole is arranged in the groove, and the flexible conductive block and the first electrode are embedded in the first mounting hole.
[0014] In some embodiments, an end of the flexible conductive block away from the first electrode is provided with a contact surface, the contact surface is flush with the inner wall surface of the groove, and the area of the contact surface is greater than the contact area of the first electrode and the flexible conductive block.
[0015] In some embodiments, the support is further provided with positioning holes located on both sides of the groove, the positioning holes are used for inserting a positioning rod on the welding equipment to position the support on the welding equipment.
[0016] In some embodiments, the support is integrally injection molded in a flexible plastic material.
[0017] In some embodiments, the welding assembly further comprises a fixing member, the fixing member is provided with a second mounting hole and a third mounting hole, and the pressure rod and the second electrode are respectively arranged in the second mounting hole and the third mounting hole.
[0018] In some embodiments, the welding assembly further comprises a fastener, the fastener is threadedly connected to the fixing member to fix the pressure rod to the fixing member.
[0019] In some embodiments, the pressure rod comprises a rod body and a pressure head arranged at one end of the rod body, the pressure head is in the shape of T, and the pressure head abuts against the built-in member at one end.
[0020] The application also provides a welding equipment comprising the welding assembly of any one of the above.
[0021] With respect to the above background technology, the welding assembly provided by the embodiments of the application is used for welding the built-in member in the outer shell, and comprises a flexible conductive block, a first electrode, a pressure rod and a second electrode. The flexible conductive block is used for contacting the outer shell in which the built-in member is arranged, so as to eliminate welding spots during welding. The first electrode is arranged along a first direction and connected to the flexible conductive block, and is used for connecting a power supply of a welding equipment. The pressure rod is arranged along a second direction perpendicular to the first direction, and is used for extending into the outer shell and abutting against the built-in member. The second electrode is arranged along the first direction and offset from the first electrode, and is connected to the pressure rod, and is used for connecting the power supply of the welding equipment.
[0022] In this way, during welding, the first electrode and the second electrode are first connected to the negative pole and the positive pole of the power supply of the welding equipment respectively, then the built-in member is placed in the outer shell, the outer shell is contacted through the flexible conductive block, and the built-in member is abutted against through the pressure rod, and finally the welding equipment is started to perform spot welding operation, so as to realize welding of the built-in member on the inner wall of the outer shell.
[0023] The welding assembly arranged in this way has the following beneficial effects:
[0024] Firstly, compared to traditional upper and lower electrodes that cannot reach the inside of the outer shell for welding, the pressure bar used in this application can extend into the inside of the outer shell and press against the built-in component. At the same time, the flexible conductive block contacts the outer shell. Since the pressure bar is connected to the second electrode and the flexible conductive block is connected to the first electrode, after the welding equipment is started, a large current passes through the two electrodes briefly, which will generate contact resistance heat in the welding area, so that the built-in component is welded to the inner wall of the outer shell, improving the feasibility of welding the built-in component inside the outer shell.
[0025] Secondly, compared to the obvious weld spots formed on the welding surface of the traditional outer shell, the flexible conductive block used in this application is flexible and conductive. It can not only increase the contact area between the first electrode and the outer shell, thereby increasing the conductive area, reducing contact resistance, and reducing heat generation to achieve the purpose of eliminating weld spots, but also avoid scratching the outer shell when it comes into contact with the outer shell surface due to the soft texture of the flexible conductive block, thereby improving the appearance quality of the product. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of the welding assembly in an embodiment of this application;
[0028] Figure 2 for Figure 1 A disassembly diagram of the welding assembly shown;
[0029] Figure 3 for Figure 1 Assembly diagram of internal components and outer shell.
[0030] in:
[0031] 10 - Flexible conductive block; 11 - Contact surface;
[0032] 20 - First electrode;
[0033] 30-Pressure bar, 31-Bar body, 32-Pressure head;
[0034] 40 - Second electrode;
[0035] 50-Support component, 51-Groove, 52-Allowing groove, 53-First mounting hole, 54-Positioning hole;
[0036] 60 - Fastener, 61 - Second mounting hole, 62 - Third mounting hole;
[0037] 70-Fasteners;
[0038] 80 - Outer casing, 81 - Pin;
[0039] 90 - Built-in components. Detailed Implementation
[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0041] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0042] It should be noted that the directional terms such as "upper end," "lower end," "left side," and "right side" mentioned below are defined based on the accompanying drawings in the instruction manual.
[0043] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the welding assembly in an embodiment of this application; Figure 2 for Figure 1 A disassembly diagram of the welding assembly shown; Figure 3 for Figure 1 Assembly diagram of internal components and outer shell.
[0044] The welding assembly provided in this application embodiment is used to weld the built-in component 90 into the outer casing 80. The outer casing 80 may be a Dewar shaped casing, and the built-in component 90 may be an Ω-shaped structural component.
[0045] The welding assembly includes a flexible conductive block 10, a first electrode 20, a pressure bar 30, and a second electrode 40.
[0046] The flexible conductive block 10 is used to contact the outer shell 80 containing the built-in component 90 to eliminate weld spots during welding. The first electrode 20 is arranged along the first direction and connected to the flexible conductive block 10. The first electrode 20 is used to connect to the negative terminal of the power supply of the welding equipment. The pressure bar 30 is arranged along the second direction perpendicular to the first direction. The pressure bar 30 is used to extend into the outer shell 80 and press against the built-in component 90. The second electrode 40 is arranged in the first direction at a offset from the first electrode 20 and connected to the pressure bar 30. The second electrode 40 is used to connect to the positive terminal of the power supply of the welding equipment.
[0047] It should be noted that the first direction mentioned above can be as follows: Figure 1 The Y-axis direction is shown, and the second direction can be as follows: Figure 1 The X-axis direction is shown.
[0048] In this way, during welding, the first electrode 20 and the second electrode 40 are first connected to the negative and positive terminals of the power supply of the welding equipment, respectively. Then, the built-in component 90 is placed inside the outer shell 80, and the flexible conductive block 10 contacts the outer shell 80. The built-in component 90 is pressed by the pressure bar 30. Finally, the welding equipment is started to perform spot welding to weld the built-in component 90 to the inner wall of the outer shell 80.
[0049] On the one hand, compared with the traditional upper and lower electrodes that cannot reach the inside of the outer shell 80 for welding, the pressure rod 30 used in this application can extend into the inside of the outer shell 80 and press against the built-in component 90. At the same time, the flexible conductive block 10 contacts the outer shell 80. Since the pressure rod 30 is connected to the second electrode 40 and the flexible conductive block 10 is connected to the first electrode 20, after the welding equipment is started, a large current passes through the two electrodes briefly, which will generate contact resistance heat in the welding area, so that the built-in component 90 is welded to the inner wall of the outer shell 80, improving the feasibility of welding the built-in component 90 inside the outer shell 80.
[0050] On the other hand, compared to the obvious weld spots that form on the welding surface of the traditional outer shell 80, the flexible conductive block 10 used in this application is flexible and conductive. It can not only increase the contact area between the first electrode 20 and the outer shell 80, thereby increasing the conductive area, reducing contact resistance, and reducing heat generation to eliminate weld spots, but also avoid scratching the outer shell 80 when it comes into contact with the surface of the outer shell 80 due to the soft texture of the flexible conductive block 10, thereby improving the appearance quality of the product.
[0051] It should be noted that the built-in component 90 and the outer shell 80 of this application need to be welded using resistance welding. Resistance welding utilizes the resistance heat generated at the contact point between the built-in component 90 and the outer shell 80 as a heat source to locally heat the built-in component 90 and the outer shell 80 to a molten or plastic state, while simultaneously applying pressure for welding. During operation, the flexible conductive block 10 and the pressure rod 30 apply pressure to the welding area (the metal area between the flexible conductive block 10 and the pressure rod 30) of the outer shell 80 and the built-in component 90, respectively. When a large current is briefly passed through the two electrodes, contact resistance heat is generated in the welding area, causing the metal atoms on the separating surfaces of the outer shell 80 and the built-in component 90 to approach the lattice distance (0.3~0.5nm), forming metallic bonds. Sufficient common grains are generated on the bonding surface of the outer shell 80 and the built-in component 90 to obtain the weld point. The heat generation of resistance welding is mainly determined by three factors: welding current, resistance between electrodes, and welding time. Among these, welding current is the most critical factor affecting heat generation.
[0052] To facilitate support of the outer housing 80 containing the built-in component 90, the welding assembly also includes a support 50. The support 50 supports the outer housing 80 containing the built-in component 90, and the outer housing 80 can rotate on the support 50 while maintaining stability.
[0053] For this purpose, the support member 50 is provided with a groove 51 and a clearance groove 52. The groove 51 is specifically an arc groove, which is used to place the outer shell 80. The inner wall of the groove 51 is in contact with and fits against the outer wall of the outer shell 80. The clearance groove 52 is used to avoid the pins 81 (also known as pins, copper pins, etc.) on the outer shell 80.
[0054] To facilitate the movement and adjustment of the outer casing 80 along the second direction (or the axial direction of the outer casing 80) on the support member 50, at least two clearance slots 52 can be provided on the support member 50, and at least two clearance slots 52 are spaced apart along the second direction.
[0055] In this way, the outer casing 80 can rotate within the groove 51, and the pin 81 on the outer casing 80 can be accommodated in the clearance groove 52 to prevent interference with the support member 50.
[0056] Furthermore, the support member 50 is provided with a first mounting hole 53, which is located within the groove 51. The flexible conductive block 10 and the first electrode 20 are embedded in the first mounting hole 53. The axial direction of the first mounting hole 53 is along a first direction. During installation, the flexible conductive block 10 is embedded in the top of the first mounting hole 53, and the top surface of the flexible conductive block 10 is flush with the inner wall of the groove 51. The first electrode 20 is inserted into the first mounting hole 53 from bottom to top and abuts against the bottom of the flexible conductive block 10 to achieve conductive contact. At least a portion of the structure of the first electrode 20 is exposed in the first mounting hole 53 to facilitate connection with the negative terminal of the welding equipment power supply.
[0057] In other words, the support member 50 can not only support the outer shell 80 containing the built-in member 90, but also fix the flexible conductive block 10 and the first electrode 20.
[0058] Furthermore, for Dewar shells with different structures, the shape of the support member 50 can be easily changed to accommodate Dewar shells with different structures.
[0059] In some embodiments, the flexible conductive block 10 has a contact surface 11 at one end away from the first electrode 20. The contact surface 11 is an arc-shaped contact surface, which is flush with the inner wall of the groove 51 and in contact with the outer wall of the outer shell 80. Furthermore, the area of the arc-shaped contact surface is larger than the contact area between the first electrode 20 and the flexible conductive block 10.
[0060] Of course, depending on actual needs, the flexible conductive block 10 can be made of indium. Indium is a metal with a silvery-white luster. It is soft, ductile and malleable. The arc-shaped contact surface of the indium block contacts the outer shell 80 to increase the contact area between the first electrode 20 and the Dewar shell, increase the conductive area, reduce contact resistance, reduce heat, thereby eliminating solder spots. In addition, because the indium block is soft, it avoids scratching the Dewar shell when in contact with the surface of the Dewar shell, thus improving the appearance quality of the product.
[0061] To facilitate the positioning of the support member 50, the support member 50 is also provided with positioning holes 54 located on both sides of the groove 51. The positioning holes 54 are used for the insertion of positioning rods on the welding equipment to position the support member 50 on the welding equipment.
[0062] In some embodiments, the support member 50 is a block structure integrally injection molded from flexible plastic material.
[0063] For example, the support component 50 is made of Teflon material, which can prevent scratches on the Dewar shell and protect the Dewar shell.
[0064] To facilitate fixing the pressure bar 30 and the second electrode 40, the welding assembly also includes a fixing member 60. The fixing member 60 is provided with a second mounting hole 61 and a third mounting hole 62, and the pressure bar 30 and the second electrode 40 are respectively installed in the second mounting hole 61 and the third mounting hole 62.
[0065] In some embodiments, the second mounting hole 61 and the third mounting hole 62 are connected, and the second mounting hole 61 and the third mounting hole 62 are combined to form an L-shaped hole. The second electrode 40 is inserted into the third mounting hole 62 along the first direction, and the pressure rod 30 is inserted into the second mounting hole 61 along the second direction. The pressure rod 30 abuts against the second electrode 40 to achieve conductive contact.
[0066] Furthermore, to facilitate the fixing of the pressure bar 30, the welding assembly also includes a fastener 70, which is threadedly connected to the fixing member 60 so that the pressure bar 30 is fixed to the fixing member 60.
[0067] In some embodiments, the pressure bar 30 includes a bar body 31 and a pressure head 32 disposed at one end of the bar body 31. The fixing member 60 fixes the bar body 31, allowing the pressure head 32 of the pressure bar 30 to extend into the interior of the Dewar shell for spot welding. The pressure head 32 is T-shaped, with one end of the pressure head 32 pressing against the arc-shaped strip of the built-in member 90.
[0068] The pressure head 32, which adopts a T-shaped structure, can continue to press against the inner part 90 through the other end after one end of the pressure head 32 is worn.
[0069] During operation, first screw the second electrode 40 into the third mounting hole 62 of the fixing member 60, insert the pressure rod 30 into the second mounting hole 61 of the fixing member 60 and fasten it with the fastener 70. Then, insert the flexible conductive block 10 and the first electrode 20 into the first mounting hole 53 of the support member 50 respectively. The second electrode 40 and the first electrode 20 are respectively connected to the positive and negative output terminals of the resistance welding equipment for transmitting current. Then, place the outer shell 80 in the groove 51 of the support member 50, put the inner part 90 into the outer shell 80, and finally, start the resistance welding equipment to perform spot welding.
[0070] The aforementioned welding components have a simple structure, low manufacturing cost, high applicability, and simple operation method. They can solve the technical problems of traditional resistance welding electrode structures being unable to weld Dewar shells and obvious resistance welding weld spots. By solving these problems, the feasibility of welding Dewar products can be improved, meeting the strict requirements of different customers for the welding quality of Dewar products, thereby enhancing the market competitiveness and user satisfaction of Dewar products.
[0071] The welding equipment provided in this application includes the welding components described in the above specific embodiments; other parts of the welding equipment can be referred to in related technologies, and will not be elaborated here.
[0072] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.
[0073] The welding components and welding equipment provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.
Claims
1. A welding assembly for welding an inner member (90) to an outer casing (80), characterized in that, include: A flexible conductive block (10) is used to contact the outer housing (80) containing the built-in component (90) to eliminate solder spots during welding; The first electrode (20) is arranged along the first direction and connected to the flexible conductive block (10) for connecting the power supply of the welding equipment; A pressure bar (30) is provided along a second direction perpendicular to the first direction for extending into the outer shell (80) and pressing against the inner component (90). The second electrode (40) is offset from the first electrode (20) along the first direction and is connected to the pressure bar (30) for connecting to the power supply of the welding equipment.
2. The welding assembly as described in claim 1, characterized in that, The welding assembly also includes a support (50) for supporting the outer shell (80) in which the inner shell (90) is built. The support member (50) is provided with a groove (51) and a clearance groove (52). The groove (51) is used to place the outer shell (80), and the clearance groove (52) is used to avoid the pins (81) on the outer shell (80).
3. The welding assembly as described in claim 2, characterized in that, The support member (50) is provided with a first mounting hole (53), which is located in the groove (51). The flexible conductive block (10) and the first electrode (20) are embedded in the first mounting hole (53).
4. The welding assembly as described in claim 3, characterized in that, The flexible conductive block (10) has a contact surface (11) at one end away from the first electrode (20). The contact surface (11) is flush with the inner wall of the groove (51), and the area of the contact surface (11) is greater than the contact area between the first electrode (20) and the flexible conductive block (10).
5. The welding assembly as described in claim 2, characterized in that, The support member (50) is also provided with positioning holes (54) on both sides of the groove (51). The positioning holes (54) are used for the insertion of positioning rods on the welding equipment to position the support member (50) on the welding equipment.
6. The welding assembly as claimed in claim 2, characterized in that, The support component (50) is a flexible plastic material integrally injection molded structure.
7. The welding assembly as claimed in claim 1, characterized in that, The welding assembly also includes a fixing member (60), which has a second mounting hole (61) and a third mounting hole (62). The pressure bar (30) and the second electrode (40) are respectively installed in the second mounting hole (61) and the third mounting hole (62).
8. The welding assembly as claimed in claim 7, characterized in that, The welding assembly also includes a fastener (70) which is threaded to the fastener (60) to fix the pressure bar (30) to the fastener (60).
9. The welding assembly as claimed in claim 1, characterized in that, The pressure bar (30) includes a bar body (31) and a pressure head (32) disposed at one end of the bar body (31). The pressure head (32) is T-shaped, and one end of the pressure head (32) presses against the built-in component (90).
10. A welding device, characterized in that, Includes the welding assembly as described in any one of claims 1-9.