Welding jig

Abstract

The utility model belongs to the technical field of welding, and discloses a welding jig. The welding jig is used for fixing a first to-be-welded part and a second to-be-welded part, the first to-be-welded part comprises a first part and a second part which are connected in a bent mode, at least part of the second to-be-welded part is placed on the first part in an attached mode, and an attached area between the second to-be-welded part and the first part comprises a welding area and an abutting area. The welding jig comprises a first jig body and a second jig body, the first jig body is provided with a protruding piece, the protruding piece at least comprises a first protrusion and a second protrusion, a height difference exists between the top end face of the first protrusion and the top end face of the second protrusion, the first protrusion is used for containing a first part to be welded and a second part to be welded, and the second protrusion is used for containing a second part to be welded. The second protrusion is used for containing the second part, and the second jig is arranged on the first jig in a covering mode and is in press fit with the abutting area. According to the welding jig, the attaching tightness between the first part of the first to-be-welded part and the second to-be-welded part is guaranteed, and the welding quality is improved.

Description

Technical Field

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

[0002] In the welding fixture, a flat boss lifts the entire transparent conductive oxide (TCO) sheet upwards, so that the nickel sheet and the copper feet of the TCO sheet are kept as parallel and close as possible. Then, the contact area between the nickel sheet and the copper feet of the TCO sheet is pressed to facilitate spot welding of the welding area between the nickel sheet and the copper feet of the TCO sheet.

[0003] When the TCO sheet is a bent TCO sheet with a certain bending height, and when the bent TCO sheet is placed on the aforementioned flat boss, the upper first part of the bent TCO sheet (including the copper feet) will be suspended, and the lower second part of the bent TCO sheet will be placed directly on the boss, with at least a portion of the nickel sheet attached to the first part. When pressing the bonding area between the first part and the nickel sheet, the suspension of the first part can easily cause the entire TCO sheet to bend and deform, resulting in a large bonding gap between the first part of the TCO sheet and the nickel sheet. It is difficult to ensure the bonding effect between the nickel sheet and the first part, thus affecting the subsequent welding effect and resulting in a low yield of the finished product formed by welding the nickel sheet and the TCO sheet. Utility Model Content

[0004] The purpose of this utility model is to provide a welding fixture that can ensure the parallel fit between the first part of the first workpiece to be welded and the second workpiece to be welded, thereby ensuring the stability and reliability of the welding work, reducing the defect rate of the finished product formed by welding the first workpiece to be welded and the second workpiece to be welded, and thus improving the welding quality and welding precision.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A welding fixture for fixing a first workpiece to be welded and a second workpiece to be welded, the first workpiece to be welded comprising a first part and a second part bent and connected, at least a portion of the second workpiece to be welded being placed against the first part, the contact area between the second workpiece to be welded and the first part comprising a welding area and a pressing area, characterized in that the welding fixture comprises:

[0007] A first fixture is provided with protrusions, the protrusions including at least a first protrusion and a second protrusion, the top surface of the first protrusion and the top surface of the second protrusion having a height difference, the first protrusion being used to place the first part and part of the second part to be welded, and the second protrusion being used to place the second part.

[0008] The second fixture is placed on the first fixture and presses against the pressure area.

[0009] Preferably, the protrusion is made of aluminum.

[0010] Preferably, the surfaces of the first fixture and / or the second fixture are provided with an oxide layer.

[0011] Preferably, the first protrusion is provided with a laser release blind hole, which is offset from the welding area and can receive welding laser.

[0012] Preferably, the second protrusion has a magnetically filled blind hole, which is filled with magnetic material that can magnetically attract the first workpiece to be welded and / or the second workpiece to be welded.

[0013] Preferably, the inner ring of the first fixture is provided with a lower groove, and the protrusion is disposed in the lower groove; the welding fixture further includes:

[0014] A limiting member is provided, which is snapped into the lower groove. A limiting hole is provided on the limiting member, and the first workpiece to be welded and the second workpiece to be welded are both limited to the limiting hole.

[0015] Preferably, the second fixture has a protrusion on one side near the protrusion, the protrusion being positioned near the welding area and used to press against the pressing area.

[0016] Preferably, there is a gap between the side of the second fixture near the protrusion and the second part.

[0017] Preferably, the second fixture has an elongated groove, and when the second fixture is placed on the first fixture, the elongated groove is connected to the welding area.

[0018] Preferably, the welding fixture further includes:

[0019] The positioning component has a first positioning hole on the first fixture and a second positioning hole on the second fixture. The positioning component is used to position the first positioning hole and the second positioning hole after alignment.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a welding fixture for fixing a first workpiece to be welded and a second workpiece to be welded. The first workpiece to be welded includes a first part and a second part that are bent and connected. At least a portion of the second workpiece to be welded is placed on the first part. The contact area between the second workpiece to be welded and the first part includes a welding area and a pressing area. The welding fixture includes a first fixture and a second fixture. The first fixture is provided with protrusions, which include at least a first protrusion and a second protrusion. There is a height difference between the top surface of the first protrusion and the top surface of the second protrusion. The first protrusion is used to place the first part and a portion of the second workpiece to be welded, and the second protrusion is used to place the second part. The second fixture is then placed on the first fixture and the pressing area is pressed together. The above-mentioned arrangement can avoid the first part being suspended for pressing and welding with the second part to be welded. It can provide stable support for the first part and part of the second part to be welded through the first protrusion, ensuring the tight fit between the first part and the second part to be welded. This can limit the gaps and deformations generated between the second part to be welded and the first part during welding to a minimum, thereby ensuring the stability and reliability of the welding work, reducing the defect rate of the finished product formed by welding the first part to be welded and the second part to be welded, and improving the welding quality and welding precision. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the first structure of the first clamp provided in this embodiment of the utility model;

[0023] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 This is a schematic diagram of the structure of the second clamp provided in this embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the second structure of the first clamp provided in this embodiment of the utility model;

[0026] Figure 5 yes Figure 4 A magnified view of a section at point B in the middle;

[0027] Figure 6 This is a schematic diagram of the structure of the limiting member provided in this embodiment of the utility model.

[0028] In the picture:

[0029] 1. First fixture; 11. Protrusion; 111. First protrusion; 112. Second protrusion; 113. Magnetic filling blind hole; 114. Laser release blind hole; 12. Lower groove; 13. First connecting hole; 14. First positioning hole; 15. Fixing hole; 16. Hand-held hole; 17. Ejector hole;

[0030] 2. Limiting component; 21. Second connecting hole; 22. Limiting hole;

[0031] 3. Second fixture; 31. Third connecting hole; 32. Long groove; 33. Second positioning hole; 34. Protrusion. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] like Figures 1-5As shown, this embodiment provides a welding fixture for limiting and fixing a first and a second workpiece to be welded, so as to facilitate stable welding of the first and second workpieces directly. The first workpiece to be welded includes a first part and a second part that are bent and connected. The second workpiece to be welded is placed on the first part, and the contact area between the second workpiece to be welded and the first part includes a welding area and a pressing area. The welding fixture includes a first fixture 1 and a second fixture 3. The first fixture 1 is provided with a protrusion 11, which includes at least a first protrusion 111 and a second protrusion 112. There is a height difference between the top surface of the first protrusion 111 and the top surface of the second protrusion 112. The first protrusion 111 is used to place the first part and part of the second workpiece to be welded, and the second protrusion 112 is used to place the second part. The second fixture 3 is placed on the first fixture 1 and presses against the pressing area.

[0037] Compared to existing technologies, the welding fixture in this embodiment changes the way the first part to be welded in the bent connection is supported. By using the first protrusion 111 to provide stable support for the first part and part of the second part to be welded, the first part, which is used to press against and weld with the second part, is prevented from being suspended, ensuring a tight fit between the first part and the second part. This minimizes gaps and deformations generated during welding, ensuring the stability and reliability of the welding process, reducing the defect rate of the finished product, and thus improving welding quality and precision. In this embodiment, laser spot welding is used to weld the first part and the second part to be welded. In other embodiments, other welding methods may be used, and no limitation is made here.

[0038] Optionally, in this embodiment, the top surface of the first fixture 1 is the machining reference plane. In other embodiments, the bottom surface of the first fixture 1 can be used as the machining reference plane, and there is no limitation here.

[0039] Optionally, in this embodiment, the first workpiece to be welded is a transparent conductive oxide (TCO) sheet, and the second workpiece to be welded is a nickel sheet. During the spot welding operation, at least a portion of the nickel sheet is placed parallel to each other on top of the first portion of the TCO sheet.

[0040] Furthermore, the protrusion 11 is made of aluminum. The aluminum protrusion 11 is lightweight, has high hardness, excellent thermal conductivity, and is oxidation-resistant. Moreover, during spot welding, the aluminum material can transfer welding heat to the first fixture 1, facilitating timely heat dissipation and reducing the scrap rate of the protrusion 11. Optionally, in this embodiment, the first fixture 1 is made of aluminum, which improves the connection integrity of the protrusion 11 on the first fixture 1 and further enhances the thermal conductivity of the protrusion 11. In other embodiments, the first fixture 1 and the protrusion 11 can also be made of materials such as stainless steel, and there is no limitation here.

[0041] Optionally, such as Figures 1-5 As shown, in this embodiment, the protrusion 11 includes a first protrusion 111 and a second protrusion 112, with the top surface of the first protrusion 111 being higher than the top surface of the second protrusion 112. The projection of the first protrusion 111 onto the mating area forms a welding area, and the first protrusion 111 supports the first part and part of the second part to be welded, while the second protrusion 112 provides stable support for the second part. In other embodiments, a third protrusion, etc., may be provided according to the specifications of the first and second parts to be welded, and this is not limited here.

[0042] Optionally, in this embodiment, the top surface of the first protrusion 111 is 0.45mm-0.65mm higher than the top surface of the second protrusion 112. For example, the difference in height between the top surface of the first protrusion 111 and the top surface of the second protrusion 112 can be 0.45mm, 0.5mm, 0.55mm, 0.6mm, or 0.65mm. In this embodiment, the top surface of the first protrusion 111 is 0.5mm higher than the top surface of the second protrusion 112.

[0043] Optionally, such as Figure 2 As shown, in this embodiment, the first protrusion 111 is configured as a U-shaped structure. This configuration reduces the area of ​​the welding region and avoids the problem of the first protrusion 111 burning during prolonged welding. In other embodiments, the shape of the first protrusion 111 is not limited, as long as it can form a welding region.

[0044] Optionally, such as Figure 1 As shown, in this embodiment, the protrusions 11 are arranged in an array on the first fixture 1, specifically with a row x column of 4x2. This arrangement allows for the simultaneous welding of multiple first and second components to be welded; that is, one first component and one second component can be welded on a single protrusion 11, thereby improving welding efficiency and enabling efficient welding operations. In other embodiments, the row x column arrangement of the protrusions 11 on the first fixture 1 is not limited and is configured according to the different specifications of the first and second components to be welded.

[0045] Optionally, such as Figure 1 As shown, in this embodiment, at least one fixing hole 15 is provided in the first fixture 1. The fixing hole 15 is located near the edge of the first fixture 1, and the fixing hole 15 is a through hole. This arrangement allows the first fixture 1 to be connected to other fixtures or fixed to other devices, ensuring the stability of the connection of the first fixture 1. Exemplarily, one, two, three, or more fixing holes 15 may be provided; in this embodiment, three are preferred.

[0046] Optionally, such as Figure 1 As shown, in this embodiment, at least one handheld hole 16 is also provided on the first fixture 1. The handheld hole 16 is a through hole and is located near the edge of the first fixture 1. This arrangement facilitates manual gripping to move the first fixture 1, improving the ease of operation. Exemplarily, one, two, or more handheld holes 16 may be provided; in this embodiment, one is preferred.

[0047] Optionally, such as Figure 1 and Figure 2 As shown, in this embodiment, a ejector hole 17 is also provided on the first fixture 1. The ejector hole 17 is a through hole located between the first protrusion 111 and the second protrusion 112. The ejector rod can lift the first and second parts to be welded from bottom to top through the ejector hole 17, which facilitates the removal of the first and second parts to be welded after welding, greatly saving the material removal time and reducing the risk of damage to the parts to be welded due to difficulties in material removal, thereby ensuring the smooth progress of the entire welding process. In other embodiments, the ejector hole 17 can also be set in other positions of the first fixture 1, as long as it can ensure that the first and second parts to be welded after welding can be smoothly lifted out of the first fixture 1.

[0048] Furthermore, such as Figure 1 and Figure 2 As shown, a laser release blind hole 114 is provided within the first protrusion 111. The laser release blind hole 114 is offset from the welding area and can receive the welding laser. During laser spot welding, there is complex laser energy interaction in the welding area. To allow excess laser to have a release path and to avoid burning damage to the first fixture 1 caused by prolonged welding, the laser release blind hole 114 is provided, thereby ensuring the smooth progress of the entire welding process. Optionally, as... Figure 2As shown, in this embodiment, the outer edge of the first protrusion 111 is arranged in a U-shape around the periphery of the laser release blind hole 114. When welding begins, the welding laser is directly shone into the laser release blind hole 114, and the first part and the second workpiece to be welded are welded in the welding area after the energy of the welding laser has stabilized. This helps to improve the smoothness of the welding process and the welding effect.

[0049] Optionally, such as Figures 1-5 As shown, in this embodiment, the inner bottom surface of the laser release blind hole 114 is 4.6mm-4.9mm lower than the top surface of the first protrusion 111. It can be 4.6mm, 4.7mm, 4.8mm or 4.9mm, and is preferably 4.9mm in this embodiment.

[0050] Furthermore, such as Figure 2 As shown, a magnetically filled blind hole 113 is formed within the second protrusion 112. The magnetically filled blind hole 113 is filled with magnetic material, which can magnetically attract the first and / or second parts to be welded. This arrangement effectively attracts and fixes the first and / or second parts to be welded, ensuring welding accuracy and stability during the welding process and preventing displacement of the first and / or second parts due to external forces or other factors. Optionally, as... Figure 3 As shown, in this embodiment, the magnetically filled blind hole 113 is formed in the overlapping area of ​​the second portion of the second protrusion 112 and the second workpiece to be welded, so as to adsorb and fix the first workpiece to be welded and the second workpiece to be welded. In other embodiments, the magnetically filled blind hole 113 can also be set in other positions, as long as it can achieve the adsorption and fixation of either the first workpiece to be welded or the second workpiece to be welded.

[0051] Optionally, such as Figures 1-5 As shown, in this embodiment, the inner bottom surface of the magnetic blind hole 113 is 2.3mm-2.5mm lower than the top surface of the second protrusion 112. It can be 2.3mm, 2.4mm or 2.5mm, and in this embodiment, it is preferably 2.4mm.

[0052] Furthermore, such as Figure 3 As shown, a protrusion 34 is provided on the side of the second fixture 3 near the protrusion 11. The protrusion 34 is located near the welding area and is used to press and abut the area. When the second fixture 3 is placed on the first fixture 1, the protrusion 34 presses and abuts the area, making the fit between the first part to be welded and the second part to be welded tighter, further reducing the gap between the first part and the second part to be welded.

[0053] Optionally, in this embodiment, when the second fixture 3 is placed on the first fixture 1, the protrusion 34 fits against the bend between the first part and the second part and is pressed against the pressing area away from the first protrusion 111. In other embodiments, the specific area pressed by the protrusion 34 is not limited, as long as it can ensure that the welding area is not obstructed.

[0054] Optionally, a gap exists between the side of the second fixture 3 near the protrusion 11 and the second part. This arrangement ensures that when the second fixture 3 is placed on the first fixture 1, the second part is suspended between the first fixture 1 and the second fixture 3, and is not compressed by the second fixture 3, thus preventing damage to the second part; simultaneously, it prevents the first part from warping due to the second part being compressed, thereby ensuring a tight fit between the first and second parts to be welded within the welding area.

[0055] Furthermore, such as Figure 3 As shown, a long groove 32 is provided on the second fixture 3. When the second fixture 3 is placed on top of the first fixture 1, the long groove 32 communicates with the welding area, facilitating welding of the welding area through the long groove 32. This arrangement is beneficial for planning the welding path during spot welding, enabling more efficient and precise welding work and improving welding efficiency. Optionally, as... Figure 3 As shown, in this embodiment, a long groove 32 is connected to each welding area in a corresponding column. In other embodiments, the long groove 32 can be segmented, with each segment of the long groove 32 connected to a welding area; this is not a limitation.

[0056] Optionally, an oxide layer is formed on the surface of the first fixture 1 and / or the second fixture 3. The oxide layer improves the corrosion resistance of the surfaces of the first fixture 1 and / or the second fixture 3. Optionally, in this embodiment, both the surfaces of the first fixture 1 and the second fixture 3 are provided with an oxide layer, further improving the corrosion resistance of the welding fixture. In other embodiments, only one of the first fixture 1 or the second fixture 3 may have an oxide layer. Specifically, by anodizing the first fixture 1 and the second fixture 3 to form an oxide layer, not only is the corrosion resistance improved, but also the corrosion resistance, wear resistance, and hardness are enhanced, increasing the durability of the welding fixture.

[0057] Furthermore, such as Figures 1-4 As shown, the welding fixture also includes a positioning element. The first fixture 1 is provided with a first positioning hole 14, and the second fixture 3 is provided with a second positioning hole 33. The positioning element is used to position the first positioning hole 14 and the second positioning hole 33 after alignment.

[0058] Optionally, such as Figures 1-4As shown, in this embodiment, the welding fixture includes eight positioning elements (not shown in the figure). The first fixture 1 has four first positioning holes 14 at its four corners, and the second fixture 3 has four second positioning holes 33 at its four corners. The four first positioning holes 14 and four second positioning holes 33 correspond one-to-one. Each first positioning hole 14 and each second positioning hole 33 is provided with a positioning element, which can position and align one first positioning hole 14 and one second positioning hole 33. By providing first positioning holes 14 and second positioning holes 33 at the four corners of the first fixture 1 and the second fixture 3, respectively, and by providing positioning elements in each first positioning hole 14 and each second positioning hole 33, the accurate positioning of the first fixture 1 and the second fixture 3 is ensured, thereby guaranteeing that the spot welding process is performed under precise positional relationships and improving the welding quality. In other embodiments, the first positioning hole 14 and the second positioning hole 33 can be set according to requirements. For example, two first positioning holes 14 and two second positioning holes 33 are respectively provided at diagonal positions of the first fixture 1 and the second fixture 3, which can ensure the accurate positioning of the first fixture 1 and the second fixture 3. Specifically, in this embodiment, the positioning element is a magnet, which can provide auxiliary guidance for the positioning of the first fixture 1 and the second fixture 3, so that the first fixture 1 and the second fixture 3 gradually approach and accurately reach the predetermined position.

[0059] Optionally, such as Figure 1 and Figure 4 As shown, a lower groove 12 is provided in the inner ring of the first fixture 1, and a protrusion 11 is disposed in the lower groove 12; the welding fixture also includes a limiting member 2, which is snapped into the lower groove 12, and a limiting hole 22 is provided on the limiting member 2, so that the first workpiece to be welded and the second workpiece to be welded are both limited to the limiting hole 22.

[0060] By setting the limiting member 2 in the lower groove 12 and making the thickness of the limiting member 2 the same as the depth of the lower groove 12, so that the top surface of the limiting member 2 is flush with the top surface of the first fixture 1, the second fixture 3 is placed on the first fixture 1, and the second fixture 3 is closely connected to the first fixture 1, which helps to improve the connection stability of the welding fixture. At the same time, both the first and second parts to be welded are confined in the limiting hole 22, so that the positions of the first and second parts to be welded in the welding fixture are fixed, avoiding the problem of poor welding quality caused by displacement.

[0061] Optionally, in this embodiment, the bottom surface of the lower groove 12 is 1.5mm-1.7mm lower than the top surface of the first fixture 1, which can be 1.5mm, 1.6mm or 1.7mm, and is preferably 1.6mm in this embodiment.

[0062] Optionally, such as Figure 1 and Figure 6As shown, in this embodiment, the welding fixture also includes two bolts (not shown in the figure). Two first connecting holes 13 are formed at the edge of the lower groove 12 of the first fixture 1, spaced apart horizontally. Two second connecting holes 21 are formed at intervals horizontally between the limiting member 2. The two first connecting holes 13 and the two second connecting holes 21 correspond one-to-one. A bolt can pass through one aligned first connecting hole 13 and one aligned second connecting hole 21 to securely connect the first fixture 1 and the limiting member 2. This configuration allows the limiting member 2 to provide positioning for both the first and second workpieces to be welded while simultaneously securing the first fixture 1 and the limiting member 2 together. This ensures a tight connection between the first fixture 1 and the limiting member 2 during the welding process, further guaranteeing the accuracy and quality of the welding. In other embodiments, the first connecting hole 13 and the second connecting hole 21 can be set as needed. For example, four first connecting holes 13 and two second connecting holes 21 are respectively provided at the four corners of the lower groove 12 of the first fixture 1 and the four corners of the limiting member 2, which can ensure the fastening of the first fixture 1 and the limiting member 2.

[0063] Optionally, such as Figures 1-3 and Figure 6 As shown, in this embodiment, the second fixture 3 has two third connecting holes 31 spaced apart along the horizontal direction. When the second fixture 3 is placed on the first fixture 1, the two third connecting holes 31, the two first connecting holes 13, and the two second connecting holes 21 correspond one-to-one, and the third connecting holes 31 are limited to the outer periphery of the bolts fastened to the first fixture 1 and the limiting member 2. The above arrangement allows the second fixture 3 to hard limit the bolts through the third connecting holes 31, providing guidance for the second fixture 3 to be placed on the first fixture 1, while preventing relative movement of the second fixture 3 relative to the first fixture 1.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A welding fixture for fixing a first workpiece to be welded and a second workpiece to be welded, the first workpiece to be welded comprising a first portion and a second portion bent and connected, at least a portion of the second workpiece to be welded being placed against the first portion, the contact area between the second workpiece to be welded and the first portion comprising a welding area and a pressing area, characterized in that, The welding fixture includes: A first fixture (1) is provided with a protrusion (11), the protrusion (11) including at least a first protrusion (111) and a second protrusion (112), there is a height difference between the top surface of the first protrusion (111) and the top surface of the second protrusion (112), the first protrusion (111) is used to place the first part and part of the second part to be welded, and the second protrusion (112) is used to place the second part; The second fixture (3) is placed on the first fixture (1) and presses against the pressure area.

2. The welding fixture according to claim 1, characterized in that, The protrusion (11) is made of aluminum.

3. The welding fixture according to claim 1, characterized in that, The surfaces of the first fixture (1) and / or the second fixture (3) are provided with an oxide layer.

4. The welding fixture according to any one of claims 1-3, characterized in that, The first protrusion (111) is provided with a laser release blind hole (114), which is offset from the welding area and can receive welding laser.

5. The welding fixture according to any one of claims 1-3, characterized in that, The second protrusion (112) has a magnetically filled blind hole (113) inside, which is used to fill magnetic material. The magnetic material can magnetically attract the first workpiece to be welded and / or the second workpiece to be welded.

6. The welding fixture according to any one of claims 1-3, characterized in that, The first fixture (1) has a lower groove (12) on its inner ring, and the protrusion (11) is disposed in the lower groove (12); the welding fixture further includes: A limiting member (2) is attached to the lower groove (12). A limiting hole (22) is provided on the limiting member (2). The first workpiece to be welded and the second workpiece to be welded are both limited to the limiting hole (22).

7. The welding fixture according to any one of claims 1-3, characterized in that, The second fixture (3) has a protrusion (34) on one side near the protrusion (11). The protrusion (34) is located near the welding area and is used to press the pressing area.

8. The welding fixture according to any one of claims 1-3, characterized in that, There is a gap between the second fixture (3) and the second part on the side near the protrusion (11).

9. The welding fixture according to any one of claims 1-3, characterized in that, The second fixture (3) has a long groove (32) and when the second fixture (3) is placed on the first fixture (1), the long groove (32) is connected to the welding area.

10. The welding fixture according to any one of claims 1-3, characterized in that, The welding fixture also includes: The positioning component is provided with a first positioning hole (14) on the first fixture (1) and a second positioning hole (33) on the second fixture (3). The positioning component is used to position the first positioning hole (14) and the second positioning hole (33) after alignment.

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