Electric resistance welding device
Through coaxially integrated internal and external electrode design and elastic parts connection, the problems of space occupation and current loss of resistance welding devices in narrow scenarios are solved, and the welding effect with compact structure, convenient positioning and low cost is achieved.
Patent Information
- Application Number
- CN202422527623.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-18
AI Technical Summary
The two independent electrodes of the existing resistance welding device occupy a large space and are difficult to use in narrow scenarios. They are inconvenient to move synchronously, and have serious current losses, high costs, and poor environmental protection and economicality.
The inner and outer electrodes are designed with coaxially integrated inner electrodes and are arranged outside the inner electrodes and are connected by elastic parts to achieve positioning adjustment and current loss reduction. The inner and outer electrodes come into contact with the welded parts respectively to shorten the connection wires.
Save space, simplify positioning adjustment, reduce current loss, reduce costs, adapt to welded parts of different sizes, has a compact structure and is easy to use in narrow scenarios.
Smart Images
Figure CN223250760U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of resistance welding, in particular to a resistance welding device. Background Art
[0002] Resistance welding uses the resistance heat generated by an electric current passing through the weldment and the contact points as a heat source to locally heat the weldment while simultaneously applying pressure to weld. No filler metal is required, resulting in high productivity, minimal weld deformation, and ease of automation. Current resistance welding generally uses two independent welding electrodes. Each electrode presses against the intersecting metals and releases current to weld.
[0003] However, the two electrodes are independent of each other. On the one hand, they take up a large space, which is not conducive to operation in narrow scenes; on the other hand, they must be moved synchronously when in use, which is not convenient for positioning and adjustment; moreover, this design structure requires longer wires to connect the two electrodes to the two poles of the welding transformer, which has the problems of high cost and serious current loss during transmission, and is less environmentally friendly and economical. Utility Model Content
[0004] The utility model aims to provide a resistance welding device with a compact structure, saving space, facilitating positioning and adjustment between two electrodes, and reducing welding current loss.
[0005] To achieve this purpose, the present invention adopts the following technical solutions:
[0006] A resistance welding device is used to weld a first welding part and a second welding part together, and the resistance welding device includes:
[0007] a first electrode and a second electrode, the second electrode being insulated from the first electrode, the first electrode comprising an inner electrode, the second electrode comprising an outer electrode, the outer electrode being coaxial and slidably sleeved outside the inner electrode, the inner electrode having a first pressure-welding portion at one end, the outer electrode having a second pressure-welding portion at one end, the first pressure-welding portion and the second pressure-welding portion being located at the same end in the axial direction;
[0008] The first electrode is also connected to the second electrode through the elastic member. When the first pressure welding portion is pressed against the first welding member, the first electrode pushes the second electrode in the same direction through the elastic member to press the second pressure welding portion against the second welding member.
[0009] Optionally, the resistance welding device further includes a first insulating sleeve, which is located between the inner electrode and the outer electrode, one of the inner electrode and the outer electrode is relatively fixed to the first insulating sleeve, and the other is slidably fitted with the first insulating sleeve.
[0010] Optionally, the first insulating sleeve is sleeved and fixed on the outside of the inner electrode, the outer electrode is slidably sleeved on the first insulating sleeve, and the second electrode further includes a first limiting portion arranged on the outer electrode. Under the action of the elastic member, the first limiting portion can be pressed against the end face of the first insulating sleeve away from the first pressure welding portion.
[0011] Optionally, the first electrode further includes a boss, which is arranged at an end of the inner electrode away from the first pressure welding portion, and the elastic member is sleeved on the inner electrode, with one end of the elastic member pressed against the boss and the other end pressed against an end of the second electrode away from the second pressure welding portion.
[0012] Optionally, the resistance welding device further includes a second insulating sleeve and an insulating ring, the second insulating sleeve is located between the elastic member and the inner electrode, the insulating ring is sandwiched between the elastic member and the boss and / or the insulating ring is sandwiched between the elastic member and the second electrode.
[0013] Optionally, the resistance welding device further includes a pushing mechanism, the boss is provided on the pushing mechanism and is insulated from the pushing mechanism, and the pushing mechanism pushes the first electrode along the axial direction of the inner electrode.
[0014] Optionally, one end of the outer electrode further has a clearance notch, the clearance notch and the second pressure welding portion are distributed along the circumferential direction, the clearance notch accommodates the first welding part, and is insulated from the first welding part.
[0015] Optionally, the clearance notch includes a first notch and a second notch opposite to each other along a first radial direction, the second pressure-welding portion includes a first positioning groove and a second positioning groove opposite to each other along a second radial direction, and the first radial direction and the second radial direction intersect at an axis.
[0016] Optionally, the resistance welding device further includes a welding transformer, and the first electrode and the second electrode are conductively connected to the welding transformer respectively.
[0017] Optionally, the first electrode further includes a pressure welding head, which is detachably provided at one end of the inner electrode, and has the first pressure welding portion.
[0018] Beneficial effects of the utility model:
[0019] The utility model provides a resistance welding device in which an outer electrode is coaxially sleeved outside an inner electrode, achieving coaxial integration and saving radial space. Moreover, the coaxial arrangement concentrates the focusing areas of the first and second pressure welding parts, which is conducive to alignment with the intersection position of the first and second welding parts, reducing current loss at the contact point. The outer electrode and the inner electrode have a first and second pressure welding parts at the same end, respectively. When the first pressure welding part is pressed against the first welding part, the first electrode pushes the second electrode in the same direction through an elastic member so that the second pressure welding part is pressed against the second welding part. The inner electrode and the outer electrode are on the same side of the welding structure and contact the first and second welding parts respectively, saving axial space. The compact structure of the inner and outer electrodes facilitates shortening the connecting wires to the welding transformer and reducing circuit loss. The inner and outer electrodes are slidably sleeved and guided with each other. Moreover, the inner and outer electrodes interact with each other through the elastic member. After one is positioned relative to the first welding part, the other is constrained by the elastic member to automatically position with the second conditional member, facilitating positioning and adjustment and adapting to first and second welding parts of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is an axonometric diagram of a resistance welding device provided by an embodiment of the present utility model;
[0021] Figure 2 It is a cross-sectional view of a resistance welding device provided by an embodiment of the present utility model.
[0022] In the picture:
[0023] 1. First welding part; 2. Second welding part;
[0024] 100, first electrode; 101, inner electrode; 102, boss; 103, first wire; 104, pressure welding head; 105, first pressure welding part;
[0025] 200, second electrode; 210, outer electrode; 220, first limiting portion; 230, second pressure welding portion; 231, first positioning groove; 232, second positioning groove; 240, clearance gap; 241, first gap; 242, second gap; 250, connecting block; 260, second wire;
[0026] 300, elastic member;
[0027] 401, first insulating sleeve; 402, second insulating sleeve; 403, insulating ring; 404, third insulating sleeve;
[0028] 500, promoting institutions;
[0029] 600. Support parts. DETAILED DESCRIPTION
[0030] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.
[0031] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0033] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.
[0034] like Figure 1 and Figure 2 As shown, this embodiment provides a resistance welding device for welding a first welding member 1 and a second welding member 2. The resistance welding device includes a first electrode 100, a second electrode 200 and an elastic member 300.
[0035] like Figure 1 and Figure 2As shown, the second electrode 200 is insulated from the first electrode 100. The first electrode 100 includes an inner electrode 101, and the second electrode 200 includes an outer electrode 210. The outer electrode 210 is coaxial and slidably mounted outside the inner electrode 101. One end of the inner electrode 101 has a first pressure welding portion 105, and one end of the outer electrode 210 has a second pressure welding portion 230. The first pressure welding portion 105 and the second pressure welding portion 230 are located at the same end in the axial direction. The first electrode 100 is also connected to the second electrode 200 via an elastic member 300. When the first pressure welding portion 105 presses against the first welding member 1, the first electrode 100 pushes the second electrode 200 in the same direction via the elastic member 300, so that the second pressure welding portion 230 presses against the second welding member 2.
[0036] In the resistance welding device provided in this embodiment, the outer electrode 210 is coaxially sleeved outside the inner electrode 101 to achieve coaxial integration and save radial space; moreover, the coaxial setting concentrates the focusing areas of the first pressure welding part 105 and the second pressure welding part 230, which is conducive to alignment with the intersection position of the first welding part 1 and the second welding part 2, thereby reducing current loss at the contact point. The same end of the outer electrode 210 and the inner electrode 101 respectively has a first pressure welding portion 105 and a second pressure welding portion 230. When the first pressure welding portion 105 is pressed against the first welding part 1, the first electrode 100 pushes the second electrode 200 in the same direction through the elastic member 300 so that the second pressure welding portion 230 is pressed against the second welding part 2. The inner electrode 101 and the outer electrode 210 are on the same side of the welding structure and contact the first welding part 1 and the second welding part 2 respectively, saving axial space; the compact structure of the inner electrode 101 and the outer electrode 210 facilitates shortening the connecting wires with the welding transformer and reducing circuit loss; the inner electrode 101 and the outer electrode 210 are slidably sleeved and guided to each other, and the inner electrode 101 and the outer electrode 210 also interact with each other through the elastic member 300. After one is positioned relative to the first welding part 1, the other is constrained by the elastic member 300 to automatically position with the second conditional member, which is convenient for positioning adjustment and can adapt to first welding parts 1 and second welding parts 2 of different sizes.
[0037] To achieve mutual insulation between the inner electrode 101 and the outer electrode 210, as shown in FIG. Figure 2 As shown, the resistance welding device optionally further includes a first insulating sleeve 401. The first insulating sleeve 401 is located between the inner electrode 101 and the outer electrode 210. One of the inner electrode 101 and the outer electrode 210 is fixed relative to the first insulating sleeve 401, and the other is slidably engaged with the first insulating sleeve 401. The first insulating sleeve 401 can be a rubber sleeve or a polymer material sleeve.
[0038] Optionally, a first insulating sleeve 401 is mounted and fixed over the inner electrode 101, and the outer electrode 210 is slidably mounted on the first insulating sleeve 401. The second electrode 200 further includes a first stopper 220 disposed on the outer electrode 210. Under the action of the elastic member 300, the first stopper 220 can abut against the end surface of the first insulating sleeve 401 away from the first pressure welding portion 105. The first stopper 220 abuts against the end surface of the first insulating sleeve 401, limiting the travel of the outer electrode 210 relative to the inner electrode 101, preventing the outer electrode 210 from sliding off the inner electrode 101 under the action of the elastic member 300. Furthermore, the outer electrode 210 can move in the opposite direction for a certain distance under the counterpressure of the welded structure. The first insulating sleeve 401 can be fixed to the inner electrode 101 by means of threaded connection, adhesive bonding, or clamping. In this embodiment, the first stopper 220 has a stepped structure.
[0039] Optionally, the first electrode 100 further includes a boss 102, which is disposed at an end of the inner electrode 101 away from the first pressure-welding portion 105. An elastic member 300 is sleeved over the inner electrode 101, with one end of the elastic member 300 abutting against the boss 102 and the other end abutting against an end of the second electrode 200 away from the second pressure-welding portion 230. The elastic member 300 sleeves over the inner electrode 101, creating a compact structure. When the inner electrode 101 moves toward the first pressure-welding portion 105, the boss 102, which is fixedly connected to the inner electrode 101, pushes the outer electrode 210 in the same direction via the elastic member 300. The elastic member 300 adaptively adjusts the relative position of the inner electrode 101 and the outer electrode 210 relative to the first and second welding members 1 and 2, providing both pressure and adjusting the dimensions of the first and second welding members 1 and 2. In this embodiment, the elastic member 300 may be a coil spring.
[0040] Optionally, the resistance welding device further includes a second insulating sleeve 402 and an insulating ring 403, wherein the second insulating sleeve 402 is located between the elastic member 300 and the inner electrode 101, the insulating ring 403 is sandwiched between the elastic member 300 and the boss 102, and / or the insulating ring 403 is sandwiched between the elastic member 300 and the second electrode 200. In one embodiment, the elastic member 300 is insulated from the inner electrode 101 by the second insulating sleeve 402, and is also insulated from the boss 102 by the insulating ring 403, thereby ensuring insulation between the second electrode 200 and the first electrode 100. In another embodiment, the elastic member 300 is insulated from the inner electrode 101 by the second insulating sleeve 402, and is also insulated from the second electrode 200 by the insulating ring 403, similarly preventing the elastic member 300 from causing conduction between the second electrode 200 and the first electrode 100.
[0041] Optionally, the resistance welding device further includes a pushing mechanism 500. The boss 102 is disposed on the pushing mechanism 500 and is insulated from the pushing mechanism 500. The pushing mechanism 500 pushes the first electrode 100 along the axial direction of the inner electrode 101. The pushing mechanism 500 drives the first electrode 100 to move, and the second electrode 200 is driven to move in the same direction via the elastic member 300. The inner electrode 101 abuts against the first welding member 1, and the second electrode 200 abuts against the second welding member 2.
[0042] The pushing mechanism 500 cooperates with the elastic member 300 to achieve the same-direction driving of the inner electrode 101 and the outer electrode 210, without providing two independent sets of driving members for the inner electrode 101 and the outer electrode 210. Specifically, the pushing mechanism 500 causes the inner electrode 101 to press against the first welding member 1, and the elastic member 300 causes the outer electrode 210 to press against the second welding member 2, ensuring that the inner electrode 101 and the outer electrode 210 are in close contact with both welding members, respectively. At the same time, the elastic member 300 realizes the pushing of the second electrode 200, eliminating the need for a second driving mechanism for the second electrode 200, thus saving space. Moreover, the elastic member 300 can adaptively adjust the position between the second electrode 200 and the inner electrode 101 to accommodate first welding members 1 and second welding members 2 of different sizes.
[0043] The propulsion mechanism 500 can be powered by any type of force, including pneumatic, hydraulic, electric, or electromagnetic elements. In this embodiment, the propulsion mechanism 500 is a cylinder. A third insulating sleeve 404 is interposed between the propulsion mechanism 500 and the boss 102 to ensure insulation between the second electrode 200 and the propulsion mechanism 500.
[0044] Optionally, a support member 600 is provided, with the first and second welding members 1 and 2 positioned between the support member 600 and the two electrodes. The first and second welding members 1 and 2 can be supported by the support member 600, while also withstanding the pressure from the propulsion mechanism 500. The support member 600 can be a standalone support block or a monolithic load-bearing platform. This embodiment completely eliminates the conventional arrangement of welding electrodes, utilizing only the support member 600 to support the first and second welding members 1 and 2. No electrodes are positioned on this side of the support member 600.
[0045] like Figure 1 and Figure 2As shown, one end of the outer electrode 210 optionally further includes a clearance notch 240. The clearance notch 240 and the second pressure-welding portion 230 are circumferentially distributed. The clearance notch 240 accommodates the first welding component 1 and provides insulation therefrom. During welding preparation, the first welding component 1 and the second welding component 2 are stacked and intersected. The clearance notch 240 is provided to avoid the first welding component 1, allowing the second pressure-welding portion 230 to pass through the first welding component 1 from the same side before pressing against the second welding component 2. The clearance notch 240 maintains non-conductive contact between the outer electrode 210 and the first welding component 1, preventing short circuits. In this embodiment, a distance is maintained between the clearance notch 240 and the first welding component 1 to provide insulation.
[0046] like Figure 2 As shown, optionally, the clearance notch 240 includes a first notch 241 and a second notch 242 opposite to each other along a first radial direction, and the second pressure welding portion 230 includes a first positioning groove 231 and a second positioning groove 232 opposite to each other along a second radial direction, and the first radial direction and the second radial direction intersect at an angle. The first notch 241 and the second notch 242 avoid and insulate the linear first welding part 1, and the first positioning groove 231 and the second positioning groove 232 press and limit the linear second welding part 2, thereby welding the intersection of the crossed first welding part 1 and the second welding part 2. The welding points are concentrated at the intersection, and the current is concentrated. At the intersection of the welded structural parts, the contact point is the smallest, the resistance is the largest, and heat is generated. Under the action of extrusion, a welding effect is formed. In this embodiment, the first radial direction and the second radial direction intersect at the axis, and the pressure welding head 104 is located at the axis, which is conducive to force balance.
[0047] The angle between the first radial direction and the second radial direction is determined by the angle between the first weld part 1 and the second weld part 2. For example, when the first weld part 1 and the second weld part 2 are perpendicular, the first radial direction and the second radial direction are perpendicular. The sizes of the first notch 241 and the second notch 242 are determined based on the diameter of the first weld part 1 to ensure that the inner electrode 101 is in full contact with the first weld part 1, while the outer electrode 210 is not in contact with the first weld part 1 via the clearance notch 240, and a sufficient gap is left between the two.
[0048] Optionally, the resistance welding device further includes a welding transformer, with the first electrode 100 and the second electrode 200 being electrically connected to the welding transformer. Specifically, the first electrode 100 is connected to the welding transformer via a first wire 103, and the second electrode 200 is connected to the welding transformer via a second wire 260. When the welding transformer performs welding and releases current, the current flows through the first wire 103, the inner electrode 101, the first welding part 1, the second welding part 2, the outer electrode 210, and the second wire 260.
[0049] like Figure 2As shown, the first electrode 100 optionally further includes a pressure welding head 104. The pressure welding head 104 is detachably mounted at one end of the inner electrode 101 and has a first pressure welding portion 105. The pressure welding head 104 is detachable, facilitating maintenance and replacement, thereby reducing costs. The connection between the pressure welding head 104 and the inner electrode 101 may be a threaded connection, a bayonet connection, or the like, which is not limited herein.
[0050] In the working process of the resistance welding device provided in this embodiment, the pushing mechanism 500 drives the first electrode 100 to move toward the welding structure, and at the same time drives the second electrode 200 to move in the same direction through the elastic member 300, until the second pressure welding portion 230 is first pressed on the second welding member 2, and at the same time, the second electrode 200 continues to press down until the first welding member 1 and the second welding member 2 are completely pressed against the support member 600. At this time, the welding transformer releases the welding current, and the welding current passes through the first wire 103, the second wire 260, the first electrode 100 and the second electrode 200, generating high temperature at the contact point between the first welding member 1 and the second welding member 2, and they are welded together under the continuous pressure of the pushing mechanism 500.
[0051] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. Resistance welding device, characterized in that, Used for welding a first welding part (1) and a second welding part (2) together to form a welded structural part, the resistance welding device comprises: A first electrode (100) and a second electrode (200), wherein the second electrode (200) and the first electrode (100) are insulated from each other, the first electrode (100) comprises an inner electrode (101), the second electrode (200) comprises an outer electrode (210), the outer electrode (210) is coaxial and slidably sleeved outside the inner electrode (101), one end of the inner electrode (101) comprises a first pressure welding portion (105), and one end of the outer electrode (210) comprises a second pressure welding portion (230), and the first pressure welding portion (105) and the second pressure welding portion (230) are located at the same end in the axial direction; The first electrode (100) is also connected to the second electrode (200) through the elastic member (300); when the first pressure welding portion (105) is pressed against the first welding member (1), the first electrode (100) pushes the second electrode (200) in the same direction through the elastic member (300), so that the second pressure welding portion (230) is pressed against the second welding member (2).
2. The resistance welding device according to claim 1, characterized in that: The resistance welding device further comprises a first insulating sleeve (401), wherein the first insulating sleeve (401) is located between the inner electrode (101) and the outer electrode (210), and one of the inner electrode (101) and the outer electrode (210) is relatively fixed to the first insulating sleeve (401), and the other is slidably matched with the first insulating sleeve (401).
3. The resistance welding device according to claim 2, characterized in that: The first insulating sleeve (401) is sleeved and fixed on the outside of the inner electrode (101), and the outer electrode (210) is slidably sleeved on the first insulating sleeve (401). The second electrode (200) further includes a first limiting portion (220) provided on the outer electrode (210). Under the action of the elastic member (300), the first limiting portion (220) can be pressed against an end face of the first insulating sleeve (401) away from the first pressure welding portion (105).
4. The resistance welding device according to claim 1, wherein: The first electrode (100) further comprises a boss (102), wherein the boss (102) is arranged at an end of the inner electrode (101) away from the first pressure welding portion (105), and the elastic member (300) is sleeved on the inner electrode (101), with one end of the elastic member (300) pressed against the boss (102) and the other end pressed against an end of the second electrode (200) away from the second pressure welding portion (230).
5. The resistance welding device according to claim 4, characterized in that: The resistance welding device further comprises a second insulating sleeve (402) and an insulating ring (403), wherein the second insulating sleeve (402) is located between the elastic member (300) and the inner electrode (101), the insulating ring (403) is sandwiched between the elastic member (300) and the boss (102), and / or the insulating ring (403) is sandwiched between the elastic member (300) and the second electrode (200).
6. The resistance welding device according to claim 4, characterized in that: The resistance welding device further comprises a pushing mechanism (500), the boss (102) is arranged on the pushing mechanism (500) and is insulated from the pushing mechanism (500), and the pushing mechanism (500) pushes the first electrode (100) along the axial direction of the inner electrode (101).
7. The resistance welding device according to claim 1, wherein: One end of the outer electrode (210) further comprises a clearance notch (240), wherein the clearance notch (240) and the second pressure welding portion (230) are distributed along the circumferential direction, and the clearance notch (240) accommodates the first welding part (1) and is insulated from the first welding part (1).
8. The resistance welding device according to claim 7, characterized in that: The clearance notch (240) comprises a first notch (241) and a second notch (242) opposite to each other along a first radial direction, and the second pressure welding portion (230) comprises a first positioning groove (231) and a second positioning groove (232) opposite to each other along a second radial direction, and the first radial direction and the second radial direction intersect at an angle.
9. The resistance welding device according to any one of claims 1 to 8, characterized in that: The resistance welding device further comprises a welding transformer, and the first electrode (100) and the second electrode (200) are respectively conductively connected to the welding transformer.
10. The resistance welding device according to any one of claims 1 to 8, characterized in that: The first electrode (100) further comprises a pressure welding head (104), wherein the pressure welding head (104) is detachably arranged at one end of the inner electrode (101), and the pressure welding head (104) has the first pressure welding portion (105).