Welding auxiliary electrode and spot welding die

Abstract

The utility model discloses a kind of welding auxiliary electrode and spot welding mould, it is related to welding technical field.The welding auxiliary electrode includes the flexible conductive member and conductive sheet of laminated arrangement, flexible conductive member and conductive sheet form the flexible electrode of deformation under pressure, so that workpiece is pressed in conductive sheet and is applied to flexible electrode certain extrusion force when welding, prompting flexible electrode to be pressed deformation, can make pot body and the outer electrode of spot welding mould realize perfect contact and fit, eliminate the contact gap that is easily produced between the both due to processing or assembly error and the like reason, and lead to the phenomenon that spark is produced when electric welding, effectively improve the welding quality, reduce the defect rate of product;While being set between pot body and flexible conductive member conductive sheet, high temperature and wear caused when welding due to simply using flexible conductive member can be effectively eliminated, easily make the situation that flexible conductive member is adhered on the surface of pot body.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a welding auxiliary electrode and a spot welding mold. Background Technology

[0002] Spot welding molds are widely used in the manufacture of stainless steel cookware. However, for products with sprayed inner surfaces (such as pots, including the pot body and handle), since the coating itself is non-conductive, the handle can only be welded using an external circulation spot welding process. That is, welding is achieved by making the outer surface of the pot body conductive. Because the pot body is often curved, coupled with factors such as the processing error and assembly error of the spot welding mold, it is difficult for the pot body to fully fit with the electrode surface of the spot welding mold during welding. This results in a gap (poor contact) between the pot body and the electrode surface, which can cause sparking when welding is performed, affecting the welding quality and the surface quality of the product. Utility Model Content

[0003] The main purpose of this utility model is to propose a welding auxiliary electrode and spot welding mold, which aims to improve the current problem that when welding pot bodies and handles, the pot body cannot be fully attached to the electrode of the spot welding mold due to processing and assembly errors, which easily leads to arcing during welding and affects the welding quality.

[0004] To achieve the above objectives, in a first aspect, this utility model proposes a welding auxiliary electrode for use in conjunction with a spot welding mold, wherein the spot welding mold has an external electrode, comprising:

[0005] A flexible conductive element has an upper surface and a lower surface, wherein the lower surface of the flexible conductive element abuts against the outer electrode;

[0006] A conductive sheet is stacked on the upper surface of the flexible conductive component, and the upper surface of the flexible conductive component is at least partially covered by the conductive sheet; the side of the conductive sheet facing away from the flexible conductive component is used to contact the workpiece.

[0007] In one embodiment, the flexible conductive element is a conductive braided strip.

[0008] In one embodiment, the flexible conductive element includes multiple strands of conductive wires, which are woven together to form the conductive braided tape.

[0009] Secondly, embodiments of this utility model provide a spot welding mold for welding a first workpiece and a second workpiece together. The spot welding mold has a Z-direction extending along its height direction and includes:

[0010] External electrode, which is arranged to move along the Z direction;

[0011] An inner electrode is fixedly disposed below the outer electrode, and the inner electrode and the outer electrode are arranged at intervals in the Z direction;

[0012] A support member, movable along the Z-axis, is used to place the first workpiece, the support member being located below the outer electrode; and

[0013] The welding auxiliary electrode described in the above embodiments is pressed against the outer electrode, and the side of the welding auxiliary electrode facing away from the outer electrode is used to place the second workpiece.

[0014] In one embodiment, in the Z direction, the outer electrode is at least partially penetrated by a first through hole;

[0015] In the Z direction, the support member is disposed inside the first through hole, and the support member is provided with a second through hole at least partially through the Z direction;

[0016] In the Z direction, the inner electrode is located inside the second via, and the inner electrode is spaced apart from the second via.

[0017] In one embodiment, the support member includes:

[0018] The support is fixedly connected to the external electrode; and

[0019] A support portion is fixedly connected to the upper surface of the support base, and the upper surface of the support portion is used to place the first workpiece;

[0020] In the Z direction, the support portion extends upward at least partially into the first through hole, so that when the first workpiece is placed on the support portion and the second workpiece is placed on the external electrode, the first workpiece and the second workpiece are in contact.

[0021] In one embodiment, the spot welding mold further includes:

[0022] Frame; and

[0023] A pad is fixedly connected to the frame; in the Z direction, the outer electrodes are spaced above the pad, and the outer electrodes are movably connected to the pad.

[0024] An elastic element extends along the Z direction, the elastic element is capable of elastic deformation along the Z direction, and one end of the elastic element in the Z direction presses against the pad and the other end presses against the external electrode;

[0025] The inner electrode is fixedly connected to the pad.

[0026] In one embodiment, the internal electrode includes:

[0027] The base is fixedly connected to the lower surface of the pad;

[0028] An electrode portion is fixedly connected to the upper surface of the base. In the Z direction, the pad plate is at least partially provided with a third through hole so that the electrode portion passes through the third through hole from bottom to top; the periphery of the electrode portion is spaced apart from the third through hole.

[0029] In the Z direction, the electrode portion is located inside the second via.

[0030] In one embodiment, the spot welding mold further includes a fixedly disposed guide member, which is spaced apart below the support member in the Z direction;

[0031] In the Z direction, the guide member is provided with at least a fourth through hole. When the first workpiece is placed on the support member, the first workpiece is at least partially located in the fourth through hole, which is used to restrict the movement of the first workpiece along a preset direction.

[0032] This utility model's welding auxiliary electrode includes a layered flexible conductive element and a conductive sheet. The flexible conductive element and the conductive sheet form a flexible electrode that can deform under pressure. During welding, the workpiece is pressed against the conductive sheet, and a certain compressive force is applied to the flexible electrode, causing it to deform under pressure. This allows the pot body to achieve perfect contact and fit with the outer electrode of the spot welding mold, eliminating the contact gaps that can easily occur due to processing or assembly errors, which can lead to sparking during welding. This effectively improves welding quality and reduces the product defect rate. At the same time, the conductive sheet placed between the pot body and the flexible conductive element effectively eliminates the high temperature and wear that can occur when using the flexible conductive element alone during welding, which can easily cause the flexible conductive element to adhere to the surface of the pot body. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of the spot welding mold of this utility model;

[0035] Figure 2 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0036] Figure 3 This is a schematic diagram of the first workpiece and the contact of the inner electrode of this utility model;

[0037] Figure 4This is a top view of the internal electrode structure of this utility model;

[0038] Figure 5 This is a front view schematic diagram of the internal electrode structure of this utility model;

[0039] Figure 6 This is a schematic diagram showing the positional relationship between the first workpiece, the second workpiece, and the external electrode of this utility model;

[0040] Figure 7 This is a top view of the external electrode structure of this utility model;

[0041] Figure 8 This is a front view schematic diagram of the external electrode structure of this utility model;

[0042] Figure 9 This is a schematic diagram showing the fit between the pressure plate and the second workpiece of this utility model;

[0043] Figure 10 This is a schematic diagram showing the mating relationship between the first workpiece and the supporting component of this utility model;

[0044] Figure 11 This is a top view of the support structure of this utility model;

[0045] Figure 12 This is a schematic front view of the support structure of this utility model;

[0046] Figure 13 This is a schematic diagram of the guide component structure of this utility model;

[0047] Figure 14 This is a cross-sectional view of the guide component of this utility model.

[0048] Figure 15 This is a top view of the pad structure of this utility model;

[0049] Figure 16 This utility model Figure 15 Schematic diagram of the AA section;

[0050] Figure 17 This is a schematic diagram showing the welding of the first and second workpieces of this utility model.

[0051] Figure 18 This is a schematic diagram of the structure of the first workpiece of this utility model;

[0052] Figure 19 This is a schematic diagram of the pressure plate structure of this utility model.

[0053] Explanation of icon numbers:

[0054] 100. Spot welding mold;

[0055] 1. External electrode; 11. First via; 111. First opening;

[0056] 2. Inner electrode; 21. Base; 22. Electrode section;

[0057] 3. Support component; 31. Second through hole; 311. Second opening; 32. Support seat; 33. Support part;

[0058] 4. Pad; 41. Third through hole; 411. Third opening;

[0059] 5. Positioning component; 51. First plate; 52. Second plate;

[0060] 6. Elastic components; 61. Springs; 62. Elastic rubber components;

[0061] 7. Guide component; 71. Fourth through hole; 711. Fourth opening; 8. Welded component; 81. First workpiece; 811. Welded part; 812. Hand-held part; 82. Second workpiece; 9. Pressure plate;

[0062] 10. Welding auxiliary electrode; 101. Flexible conductive component; 102. Conductive sheet.

[0063] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0064] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0065] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0066] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0067] Currently, in the manufacturing process of stainless steel cookware (such as pots, including the pot body and handle), spot welding molds are usually used to weld the pot body and handle together. Since the coating itself is not conductive, the handle welding can only use an external circulation spot welding process, that is, the welding is achieved by the outer surface of the pot body conducting electricity. Since the pot body is often curved, coupled with the processing error of the spot welding mold and the mold assembly error, it is difficult for the pot body to be completely attached to the electrode surface of the spot welding mold during welding, resulting in a gap (poor contact) between the pot body and the electrode surface. When welding is performed with electricity, sparking and other phenomena will occur, affecting the welding quality and the surface quality of the product.

[0068] Based on this, firstly, referring to Figure 1 , Figure 2 As shown, this application embodiment provides a welding auxiliary electrode 10 for use in conjunction with a spot welding mold 100; the spot welding mold 100 has an outer electrode 1, including a flexible conductive element 101 and a conductive sheet 102; wherein the flexible conductive element 101 has an upper surface and a lower surface, the lower surface of the flexible conductive element 101 presses against the upper surface of the outer electrode 1, and the flexible conductive element 101 can deform when pressed.

[0069] In this embodiment, the flexible conductive element 101 is a conductive braided tape. The conductive braided tape is a mesh structure formed by weaving conductive materials. For example, the conductive material can be copper, red copper, etc. The flexible conductive element 101 can be made by winding conductive wires to form multiple strands of conductive wires, and then weaving each strand of conductive wires in an interlaced manner to form a mesh structure and obtain the conductive braided tape. This configuration allows it to undergo a certain degree of compressive deformation when subjected to compressive force (because each filament is made up of a large number of conductive wires wound together, there are certain gaps between them).

[0070] In this embodiment, the conductive sheet 102 is stacked on the upper surface of the flexible conductive element 101. The upper surface of the conductive sheet 102 is used to contact the pot body, that is, the pot body is placed on the upper surface of the conductive sheet 102. The conductive sheet 102 is a thin sheet structure made of conductive material, such as copper or red copper. The flexible conductive element 101 and the conductive sheet 102 cooperate to form a welding auxiliary electrode 10, so that the pot body can be spot-welded to the welding mold 10 via the welding auxiliary electrode 10 (conductive sheet 102 and flexible conductive element 101). The outer electrode 1 of the 0 makes electrical contact. When the flexible conductive part 101 is squeezed by the pot body, it will undergo compression deformation, thereby completely filling the contact gap between the original pot body and the electrode of the spot welding mold 100. This allows the pot body to be fully attached to the electrode of the spot welding mold 100 through the welding auxiliary electrode 10 composed of the flexible conductive part 101 and the conductive sheet 102. This effectively avoids the phenomenon of arcing caused by the contact gap when welding is performed with electricity, and improves the welding quality and the surface quality of the product.

[0071] In this embodiment, the reason for setting a conductive sheet 102 between the flexible conductive element 101 and the pot body is to prevent the flexible conductive element 101 from adhering to the outer surface of the pot body due to the high temperature generated during welding and the wear between the pot body and the electrodes of the spot welding mold 100 during the welding process (the high temperature generated during welding causes the mesh-like flexible conductive element 101 to melt, causing the melted flexible conductive element 101 to adhere to the outer surface of the pot body), thereby affecting the surface quality of the product. In this application, by setting a conductive sheet 102 between the flexible conductive element 101 and the pot body, the adhesion between the flexible conductive element 101 and the pot body is effectively avoided, ensuring that no molten material generated during the welding process adheres to the outer surface of the pot body, thus keeping the outer surface of the pot body clean.

[0072] In this embodiment, the upper surface of the flexible conductive element 101 is at least partially covered by the conductive sheet 102, meaning the conductive sheet 102 may only cover a portion of the upper surface of the flexible conductive element 101. In this case, when the pot body presses against the conductive sheet 102, the flexible conductive element 101 not covered by the conductive sheet 102 may come into contact with the outer surface of the pot body during the welding process, and some molten material generated by the flexible conductive element 101 during the welding process may adhere to the outer surface of the pot body. Therefore, this arrangement is not conducive to completely eliminating the adhesion of molten material generated during welding to the outer surface of the pot body. Preferably, this application adopts an arrangement in which the conductive sheet 102 completely covers the upper surface of the flexible conductive element 101. This arrangement ensures that when the pot body presses against the conductive sheet 102, the outer surface of the pot body no longer comes into contact with the flexible conductive element 101, thereby completely eliminating the possibility of the flexible conductive element 101 coming into contact with the outer surface of the pot body. This ensures that the outer surface of the pot body remains clean after welding is completed, thus ensuring the surface quality of the product.

[0073] Secondly, referring to Figure 1 , Figure 2 As shown, this application embodiment provides a spot welding mold 100 for welding parts 8. The spot welding mold 100 has a Z-direction extending along its height direction, an X-direction extending along its width direction, and a Y-direction perpendicular to the plane containing the X and Z directions. The welded part 8 includes a first workpiece 81 and a second workpiece 82, wherein the first workpiece 81 is a handle (the handle includes a welding portion 811 and a hand-held portion 812; as shown in the image). Figure 18 As shown in the diagram (a schematic of the handle structure), the second workpiece 82 is the pot body; the spot welding mold 100 includes an outer electrode 1, an inner electrode 2, a support 3, and the welding auxiliary electrode 10 in the above embodiment; the outer electrode 1 is arranged to move along the Z direction, so that the outer electrode 1 can move in the Z direction. For example, the outer electrode 1 can be a conductive material such as copper or red copper. Since the outer surface of the pot body is arc-shaped, the upper surface of the outer electrode 1 needs to be set to a matching arc shape so that the outer surface of the pot body can have a good fit with the outer electrode 1; the inner electrode 2 is fixedly arranged below the outer electrode 1. In the Z direction, the inner electrode 2 is spaced below the outer electrode 1. For example, the inner electrode 2 can be a conductive material such as copper or red copper; the support 3 is also arranged to move along the Z direction, and the support 3 is located below the outer electrode 1. The welding part 811 of the handle is placed on the support 3; the welding auxiliary electrode 10 presses against the upper surface of the outer electrode 1 and is used to contact the outer surface of the pot body; Figure 6 , Figure 7 , Figure 8As shown, since the outer surface of the pot body has a certain arc shape, the contact part of the upper surface of the outer electrode 1 (that is, the outer surface of the pot body) is also set as a matching arc surface. Thus, when the welding auxiliary electrode 10 presses against the upper surface of the outer electrode 1, the welding auxiliary electrode 10 is also set in an arc shape and is in contact with the upper surface of the outer electrode 1.

[0074] In this embodiment, as Figure 1 , Figure 9 As shown, an external pressing device is used to press the pot body against the external electrode 1. For example, the pressing device can consist of a force-applying component and a pressure plate 9. The force-applying component can be a telescopic rod (electric or hydraulic). The pressure plate 9 is connected to the telescopic end of the telescopic rod (the two are fixed together by fasteners). The lower surface of the pressure plate 9 matches the inner surface of the pot body, meaning the lower surface of the pressure plate 9 is also arc-shaped. Thus, the external pressing device makes the outer surface of the pot body press tightly against the welding auxiliary electrode 10. Then, the external electrode 1 is controlled to move from top to bottom in the Z direction. For example, when the pot body is pressed against the welding auxiliary electrode 10 using the pressing device, the outer surface of the pot body... The outer electrode 1 can abut against the welding part 811 of the handle, or they can be spaced apart. When the outer surface of the pot body abuts against the welding part 811, the outer electrode 1 and the support 3 are simultaneously controlled to move downward in the Z direction, that is, to move towards the inner electrode 2, so that the lower surface of the welding part 811 abuts against the inner electrode 2. At this time, the outer electrode 1 contacts the outer surface of the pot body through the welding auxiliary electrode 10, the upper surface of the welding part 811 of the handle contacts the outer surface of the pot body, and the lower surface of the welding part 811 of the handle contacts the inner electrode 2. Thus, the outer electrode 1, the pot body, the welding part 811 and the inner electrode 2 form a welding conductive circuit, thereby realizing the welding connection between the handle and the pot body.

[0075] Alternatively, when pressing the pot body against the welding auxiliary electrode 10 using a pressing device, the outer surface of the pot body and the welding part 811 of the handle are spaced apart. The outer electrode 1 can be controlled to move in the Z direction toward the inner electrode 2, so that the outer surface of the pot body moves downward and contacts the upper surface of the welding part 811 placed on the support 3. Then, the support 3 is controlled to move downward synchronously with the outer electrode 1 (the moving speed of the support 3 and the outer electrode 1 should be kept the same), so that the lower surface of the welding part 811 abuts against the inner electrode 2. At this time, the outer electrode 1 contacts the outer surface of the pot body through the welding auxiliary electrode 10, the upper surface of the welding part 811 of the handle contacts the outer surface of the pot body, and the lower surface of the welding part 811 of the handle contacts the inner electrode 2. Thus, the outer electrode 1, the pot body, the welding part 811 and the inner electrode 2 form a welding conductive circuit, thereby realizing the welding connection between the handle and the pot body.

[0076] In this embodiment, after the welding between the pot body and the handle is completed (e.g. Figure 17 As shown, this is the state of the pot body and handle after welding. After the pot is welded, it is removed from the spot welding mold 100. The outer electrode 1 and the support 3 are moved to their initial positions, and the next welding operation can be carried out.

[0077] Reference Figure 7 , Figure 11 , Figure 12 As shown in one embodiment of this application, as Figure 7 As shown, in the Z direction, the outer electrode 1 is at least partially provided with a first through hole 11 (the shape and outline of the welding auxiliary electrode 10 should be consistent with the shape and outline of the upper surface of the outer electrode 1); for example, the first through hole 11 on the outer electrode 1 and the welding area of ​​the outer surface of the pot body and the welding part 811 of the handle correspond to each other, and in the Z direction, the support 3 is provided inside the first through hole 11; thus, when the pot body is pressed against the upper surface of the welding auxiliary electrode 10 under the action of the pressing device, the area where the pot body and the welding part 811 are welded is just above the first through hole 11, and as the pot body moves from top to bottom with the outer electrode 1, the welding area between the pot body and the welding part 811 can contact the welding part 811 placed on the support 3 through the first through hole 11; for example, the area of ​​the first through hole 11 should be larger than the welding area between the pot body and the welding part 811 to ensure that the welding area between the outer surface of the pot body and the welding part 811 can be completely in contact with the upper surface of the welding part 811.

[0078] In this embodiment, as Figure 11 As shown, the support member 3 has at least a partial through hole 31 along the Z direction; in the Z direction, the inner electrode 2 is located inside the second through hole 31, and the inner electrode 2 and the second through hole 31 are spaced apart (to avoid the support member 3 from contacting the inner electrode 2 and causing a safety accident); that is, the inner electrode 2 is sleeved inside the second through hole 31, and the support member 3 is sleeved outside the inner electrode 2; thus, when the welding part 811 of the handle is placed on the upper surface of the support member 3, a portion of the lower surface of the welding part 811 can be exposed through the second through hole 31, and when the support member 3 moves from top to bottom in the Z direction toward the inner electrode 2, the lower surface of the welding part 811 contacts the corresponding position of the second through hole 31 and the inner electrode 2.

[0079] Reference Figure 10 , Figure 11 , Figure 12As shown, in one embodiment of this application, the support member 3 includes a support base 32 and a support portion 33; wherein the support base 32 is fixedly connected to the external electrode 1, that is, the support member 3 can move synchronously with the external electrode 1, and only one driving member is needed to drive the external electrode 1 and the support member 3 to move synchronously; it is understood that the support member 3 (including the support base 32 and the support portion 33) should be made of insulating material; the support portion 33 is fixedly connected to the upper surface of the support base 32, and the second through hole 31 passes through the support portion 33 and the support base 32 in the Z direction in sequence; as Figure 12 As shown, since the outer surface of the pot body is arc-shaped, the welding part 811 of the handle that is welded to it is also arc-shaped. In order to ensure that the welding part 811 can be stably placed on the support part 33, the upper surface of the support part 33 needs to be set into an arc shape that matches the welding part 811. In the Z direction, the support part 33 extends upward at least partially into the first through hole 11 so that when the welding part 811 of the handle is placed on the support part 33 and the pot body is placed on the upper surface of the outer electrode 1, the outer surface of the pot body can just abut against the upper surface of the welding part 811.

[0080] Reference Figure 1 As shown, in one embodiment of this application, the spot welding mold 100 further includes a frame (not shown in the figure) and a pad 4 (as shown in the figure). Figure 15 , Figure 16 The diagram shows the structure of the pad 4 and the elastic element 6; the pad 4 is fixedly mounted on the frame, and in the Z direction, the outer electrode 1 is located above the pad 4 and is movably connected to the pad 4, while the inner electrode 2 is fixed on the pad 4; for example, as shown... Figure 1 As shown, a guide post (not shown in the figure) is provided on the upper surface of the pad 4. A guide block (with a hole for sliding cooperation with the guide post) is connected to the bottom of the outer electrode 1 and is slidably assembled with the guide post along the Z direction. For example, the outer electrode 1 and the guide block can be connected by fasteners or snap-fit. Insulation measures need to be provided between the guide block and the outer electrode 1, or the guide block is made of insulating material. This arrangement allows the outer electrode 1 to move along the Z direction on the pad 4. The elastic member 6 extends along the Z direction and can be compressed along the Z direction to produce elastic deformation. One end of the elastic member 6 abuts against the bottom of the guide block and the other end abuts against the upper part of the pad 4. The surface is thus configured to allow for an elastic connection between the external electrode 1 and the pad 4. For example, the elastic element 6 can be a spring 61, an elastic rubber element 62, or both. The spring 61 is sleeved on the outside of the guide post, and the elastic rubber element 62 is also sleeved on the outside of the guide post. This configuration allows the external electrode 1 and the support 3 to reciprocate along the Z-direction using only a pressing device, eliminating the need for an additional driving element to move them in the Z-direction, thus saving costs. For example, two elastic elements 6 can be provided, spaced apart along the X-direction, such as... Figure 1 As shown, the two elastic elements 6 are respectively located on both sides of the first workpiece 81, which can provide better elastic support for the movement of the outer electrode 1 and the support 3 in the Z direction.

[0081] In this embodiment, during welding, the pot body is placed on the upper surface of the welding auxiliary electrode 10 in a preset posture, and the welding part 811 of the handle is placed on the upper surface of the support part 33; then the pressing device is controlled and the pressure plate 9 is driven to abut against the inner surface of the pot body (e.g., Figure 9 As shown, at this time, the outer surface of the pot body and the upper surface of the welding part 811 of the handle are just in contact. Then, the pressing device is controlled to move the pressure plate 9 downward, and the outer electrode 1 (pot body) and the support 3 (welding part 811 of the handle) move synchronously in the Z direction towards the inner electrode 2. During the movement, the elastic element 6 is continuously compressed and stores energy, so that the pot body and the welding part 811 of the handle move to the preset position (at this time, the lower surface of the welding part 811 is in contact with the inner electrode 2) and the welding operation is performed. After the welding is completed, the pressing device is then controlled to move the pressure plate 9 upward, and the outer electrode 1 and the support 3 move upward synchronously under the elastic action of the elastic element 6, until they move to the initial position (the pressing device is controlled to continue to move upward a little distance, so that the pressure plate 9 separates from the pot body and the pot that has been welded is removed), thus completing one welding operation.

[0082] Reference Figure 3 , Figure 4 , Figure 5 As shown, in one embodiment of this application, the inner electrode 2 includes a base 21 and an electrode portion 22; wherein the base 21 is disposed below the pad 4 and the lower surfaces of the base 21 and the pad 4 are fixedly connected, and the electrode portion 22 is fixedly installed on the upper surface of the base 21; as shown Figure 15 As shown, a third through hole 41 is provided at least partially through the Z-axis pad 4 so that the electrode part 22 can pass through the third through hole 41 from bottom to top for contact with the lower surface of the welding part 811 of the handle. In the Z-axis, the electrode part 22 should be located inside the second through hole 31 and the inner wall of the second through hole 31 should be spaced apart to ensure the insulation between the electrode part 22 and the support part 33. The periphery of the electrode part 22 should be spaced apart from the inner wall of the third through hole 41 to ensure good insulation performance (preferably, insulating material can be provided on the inner wall of the third through hole 41).

[0083] In this embodiment, since the lower surface of the welding part 811 is arc-shaped, in order to ensure good contact between the lower surface of the welding part 811 and the upper surface of the inner electrode 2 when the welding part 811 moves downward to the preset position and contacts the upper surface of the inner electrode 2, the upper surface of the inner electrode 2 is also arc-shaped in this embodiment (e.g., Figure 5(as shown); In order to eliminate the contact gap between the welding part 811 and the upper surface of the inner electrode 2, the welding auxiliary electrode 10 in the above embodiment can also be provided on the upper surface of the inner electrode 2, so that the lower surface of the welding part 811 can be fully contacted with the inner electrode 2 through the welding auxiliary electrode 10, thereby further improving the welding quality.

[0084] Reference Figure 1 , Figure 13 , Figure 14 As shown, in one embodiment of this application, the spot welding mold 100 further includes a fixedly disposed guide member 7, such as... Figure 1 As shown, the guide 7 can be fixedly installed on one side wall of the base 21 along the Y direction. In the Z direction, the guide 7 is spaced below the support 3. The guide 7 is provided with a fourth through hole 71 along the Z direction. The size of the fourth through hole 71 along the X direction should match the width of the handle 812 so that when the welding part 811 is placed on the support 3, the handle 812 can just pass through the fourth through hole 71. The side wall of the fourth through hole 71 restricts the direction of the handle's movement as the pot moves downward, ensuring that the handle can move in the preset direction to prevent the handle from deviating from the pot and affecting product quality. Thus, during the downward movement of the pot and the handle, the relative position between the pot and the handle is always kept in the initial adjustment position, improving welding accuracy.

[0085] In this embodiment, to further improve the ease of operation, such as Figure 7 , Figure 11 , Figure 14 , Figure 15 As shown, the first through hole 11, the second through hole 31, the third through hole 41, and the fourth through hole 71 are respectively provided on the same side along the Y direction with the first through hole 11, the second through hole 31, the third through hole 41, and the fourth through hole 71. This allows the same side of the first through hole 11, the second through hole 31, the third through hole 41, and the fourth through hole 71 along the Y direction to communicate with the outside. This arrangement allows for convenient handling of the handle and, after welding is completed, allows for quick removal of the integrated cookware from the spot welding mold 100 (the cookware can be moved away by sliding it along the Y direction). This facilitates operation by workers, improves work efficiency, and saves time.

[0086] In this application, in order to stably position the welding auxiliary electrode 10 on the upper surface of the outer electrode 1, a positioning member 5 can be provided, and the welding auxiliary electrode 10 can be firmly positioned on the outer electrode 1 by the positioning member 5; for example, such as Figure 19As shown, two positioning elements 5 can be provided, located on both sides of the outer electrode 1 along the X direction, or four positioning elements 5 can be provided, in pairs, located on both sides of the outer electrode 1 along the Y direction, which can achieve a better positioning effect. The positioning element 5 includes a first plate 51 and a second plate 52 connected in the Z direction. The first plate 51 is used to press against the welding auxiliary electrode 10, and the second plate 52 is set along the Z direction. The shape and contour of the first plate 51 should be consistent with the shape and contour of the upper surface of the outer electrode 1 (that is, set as an arc shape). The second plate 52 has a hole, through which a bolt passes and is threaded onto a guide block connected to the outer electrode 1 (the guide block has a threaded hole that mates with the bolt. Under the tightening action of the bolt, the second plate 52 abuts against the outer electrode 1 and the side wall of the guide block along the Y direction). Thus, the welding auxiliary electrode 10 can be pressed and positioned on the outer electrode 1 through the cooperation of the first plate 51 and the second plate 52.

[0087] In this embodiment, the first plate 51 and the second plate 52 should be made of insulating material, and the thickness of the first plate 51 should be set as thin as possible so as not to affect the contact between the outer surface of the pot body and the welding auxiliary electrode 10; or the positioning member 5 is set in the area of ​​the outer surface of the pot body that does not contact the welding auxiliary electrode 10, that is, the two sides of the welding auxiliary connection along the X direction. In this way, the positioning member 5 will not affect the contact between the outer surface of the pot body and the welding auxiliary electrode 10.

[0088] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A welding auxiliary electrode for use with a spot welding mold, the spot welding mold having an external electrode, characterized in that, include: A flexible conductive element has an upper surface and a lower surface, wherein the lower surface of the flexible conductive element abuts against the outer electrode; A conductive sheet is stacked on the upper surface of the flexible conductive component, and the upper surface of the flexible conductive component is at least partially covered by the conductive sheet; the side of the conductive sheet facing away from the flexible conductive component is used to contact the workpiece.

2. The welding auxiliary electrode as described in claim 1, characterized in that, The flexible conductive element is a conductive braided strip.

3. The welding auxiliary electrode as described in claim 2, characterized in that, The flexible conductive element includes multiple strands of conductive wires, which are woven together to form the conductive braided tape.

4. A spot welding mold for welding a first workpiece and a second workpiece together, the spot welding mold having a Z-direction extending along its height direction, characterized in that, include: External electrode, which is arranged to move along the Z direction; An inner electrode is fixedly disposed below the outer electrode, and the inner electrode and the outer electrode are arranged at intervals in the Z direction; A support member, movable along the Z-direction, is used to place the first workpiece, and the support member is located below the outer electrode; as well as The welding auxiliary electrode according to any one of claims 1-3, wherein the welding auxiliary electrode abuts against the outer electrode, and the side of the welding auxiliary electrode opposite to the outer electrode is used to place the second workpiece.

5. The spot welding mold as described in claim 4, characterized in that, In the Z direction, the outer electrode is at least partially penetrated by a first through hole; In the Z direction, the support member is disposed inside the first through hole, and the support member is provided with a second through hole at least partially through the Z direction; In the Z direction, the inner electrode is located inside the second via, and the inner electrode is spaced apart from the second via.

6. The spot welding mold as described in claim 5, characterized in that, The support component includes: The support is fixedly connected to the external electrode; and A support portion is fixedly connected to the upper surface of the support base, and the upper surface of the support portion is used to place the first workpiece; In the Z direction, the support portion extends upward at least partially into the first through hole, so that when the first workpiece is placed on the support portion and the second workpiece is placed on the external electrode, the first workpiece and the second workpiece are in contact.

7. The spot welding mold as described in any one of claims 4-6, characterized in that, The spot welding mold also includes: Frame; and A pad is fixedly connected to the frame; in the Z direction, the outer electrodes are spaced above the pad, and the outer electrodes are movably connected to the pad. An elastic element extends along the Z direction, the elastic element is capable of elastic deformation along the Z direction, and one end of the elastic element in the Z direction presses against the pad and the other end presses against the external electrode; The inner electrode is fixedly connected to the pad.

8. The spot welding mold as described in claim 7, characterized in that, The internal electrode includes: The base is fixedly connected to the lower surface of the pad; An electrode portion is fixedly connected to the upper surface of the base. In the Z direction, the pad plate is at least partially provided with a third through hole so that the electrode portion passes through the third through hole from bottom to top; the periphery of the electrode portion is spaced apart from the third through hole. The support member is provided with a second through hole at least partially extending along the Z direction, and the electrode portion is located inside the second through hole in the Z direction.

9. The spot welding mold as described in claim 4, characterized in that, The spot welding mold also includes a fixedly arranged guide member, which is spaced apart below the support member in the Z direction; In the Z direction, the guide member is provided with at least a fourth through hole. When the first workpiece is placed on the support member, the first workpiece is at least partially located in the fourth through hole, which is used to restrict the movement of the first workpiece along a preset direction.

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