Welding fixtures

Abstract

This utility model discloses a welding fixture, which includes a base, a first pressure block, and a second pressure block. The base has a first positioning groove for positioning a first welded part. The first pressure block is detachably connected to the base. The base, the first pressure block, and the first welded part disposed in the first positioning groove define a second positioning groove for positioning either a second welded part or a third welded part. The second pressure block is detachably connected to the base and is used to clamp either the second or third welded part. The welding fixture provided by this utility model has the advantages of being able to complete at least two laser welding operations, requiring fewer fixture changes during the first piece welding, and having high first piece inspection efficiency.

Description

Technical Field

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

[0002] Laser welding is a key technology for connecting various battery components. The stability of laser welding directly affects the quality of the battery. Before each shift, a first-piece inspection is usually required for each laser-welded section to measure the weld depth and width. Only after passing the inspection can subsequent production proceed. In related technologies, battery assembly typically involves up to seven laser welding operations, requiring different tooling to position the two parts to be welded. When performing the first-piece welding, all of these toolings need to be switched sequentially, affecting the efficiency of the first-piece inspection. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose a welding fixture that has the advantages of being able to complete at least two laser welding operations, requiring fewer fixture switching operations during the first piece welding, and having high efficiency in the first piece inspection.

[0005] The welding fixture of this utility model embodiment includes a base, a first pressure block, and a second pressure block. The base is provided with a first positioning groove for positioning a first welded part. The first pressure block is detachably connected to the base. The base, the first pressure block, and the first welded part disposed in the first positioning groove define a second positioning groove for positioning either a second welded part or a third welded part. The second pressure block is detachably connected to the base and is used to press either the second welded part or the third welded part.

[0006] According to the welding fixture of this utility model embodiment, a first positioning groove for positioning a first weldment is provided on the base. After the first weldment is placed in the first positioning groove, the first weldment and a first pressure block can define a second positioning groove for positioning either a second weldment or a third weldment. The second pressure block then presses either the second or third weldment together. Therefore, the second weldment can be placed in the second positioning groove to complete welding with the first weldment, or the third weldment can be placed in the second positioning groove to complete welding with the first weldment. This effectively reduces the number of fixture changes during the initial welding, thereby significantly improving the efficiency of the first-piece inspection.

[0007] In some embodiments, the base includes a base body and a protrusion disposed on the upper surface of the base body, a first positioning groove is disposed in the base body, a first pressing block is detachably connected to the base body for pressing the first welded component, and the protrusion, the first pressing block and the first welded component disposed in the first positioning groove define a second positioning groove.

[0008] In some embodiments, the first pressing block and the protrusion are arranged along a first direction of the substrate, the first pressing block has a first limiting protrusion on the side facing the protrusion, the first limiting protrusion and the protrusion are arranged at intervals along a second direction, the second direction is orthogonal to the first direction, and the sides of the first limiting protrusion and the protrusion opposite to each other form a portion of the side of the second positioning groove.

[0009] In some embodiments, there are at least two second pressure blocks, and at least one of the second welded parts and the third welded part is pressed against each other at opposite ends along the second direction of the base by at least one of the second pressure blocks, and at least one of the second pressure blocks presses against the end of the second welded part and the third welded part away from the first pressure block.

[0010] In some embodiments, the base is provided with at least two first threaded holes, the first pressure block is provided with first mounting holes corresponding to the first threaded holes, and the welding fixture further includes a first threaded component that passes through the first mounting hole and is threadedly connected to the corresponding first threaded hole.

[0011] In some embodiments, the protrusion is provided with a second threaded hole, the second pressure block is provided with a second mounting hole, and the welding fixture further includes a second threaded member that passes through the second mounting hole and is threadedly connected to the second threaded hole.

[0012] In some embodiments, the protrusion is provided with a first guide groove extending along the second direction, the second pressure block is slidably fitted in the first guide groove, the second threaded hole is provided on the bottom surface of the first guide groove, and the second mounting hole is a strip-shaped hole with a length extending along the second direction.

[0013] In some embodiments, the welding fixture further includes a third pressure block and a fourth pressure block. The third pressure block is detachably connected to the base and is used to press the first welded part. The third pressure block and the first welded part disposed in the first positioning groove define a third positioning groove. The third positioning groove is used to position a fourth welded part. The fourth pressure block is detachably connected to the third pressure block and is used to press a fifth welded part onto the fourth welded part.

[0014] In some embodiments, the base is provided with at least two third threaded holes, the third pressure block is provided with third mounting holes corresponding to the third threaded holes, and the welding fixture further includes a third threaded component that passes through the third mounting holes and is threadedly connected to the corresponding third threaded holes.

[0015] In some embodiments, there are two third pressure blocks arranged at intervals along a first direction of the substrate, and the two third pressure blocks are respectively pressed against the two opposite ends of the first welded part along the first direction;

[0016] Each of the third pressure blocks has two second limiting protrusions spaced apart along a second direction of the base on the side facing the other third pressure block. The second direction is orthogonal to the first direction. The sides of the two second limiting protrusions facing each other form part of the side of the third positioning groove.

[0017] In some embodiments, the fourth pressure block is provided with a fourth mounting hole, the upper surface of the third pressure block is provided with a fourth threaded hole, and the welding fixture further includes a fourth threaded member that passes through the fourth mounting hole and is threadedly connected to the fourth threaded hole. The fourth pressure block is axially pivotable relative to the third pressure block about the fourth threaded hole so that a portion of the fourth pressure block has a first position above the third positioning groove and a second position that avoids the third positioning groove.

[0018] In some embodiments, the welding fixture further includes a fifth pressure block, which is detachably connected to the substrate and is used to press a sixth weldment onto the first weldment.

[0019] In some embodiments, the fifth pressure block is provided with a fifth mounting hole, the upper surface of the substrate is provided with a fifth threaded hole, and the welding fixture further includes a fifth threaded component that passes through the fifth mounting hole and is threadedly connected to the fifth threaded hole.

[0020] In some embodiments, the protrusion is provided with a second guide groove, the fifth pressure block is slidably fitted in the second guide groove, the fifth threaded hole is provided on the bottom surface of the second guide groove, and the fifth mounting hole is a strip-shaped hole with a length consistent with the extension direction of the second guide groove. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the base in the welding fixture according to an embodiment of the present utility model.

[0022] Figure 2 This is a schematic diagram of the welding fixture and the first welded part according to an embodiment of the present utility model.

[0023] Figure 3This is a schematic diagram of welding the first and second welded parts according to the welding fixture of this utility model embodiment.

[0024] Figure 4 This is a schematic diagram of welding the first and third welded parts according to the welding fixture of this utility model embodiment.

[0025] Figure 5 This is a schematic diagram of welding the fourth and fifth welded parts according to the welding fixture of this utility model embodiment.

[0026] Figure 6 This is a schematic diagram of welding the first and sixth welded parts according to the welding fixture of this utility model embodiment.

[0027] Figure label:

[0028] 1. Base; 11. Substrate; 111. First positioning groove; 12. Protrusion; 121. First guide groove; 122. Second guide groove; 2. First pressure block; 21. First limiting protrusion; 3. Second pressure block; 31. Second mounting hole; 4. Third pressure block; 41. Second limiting protrusion; 5. Fourth pressure block; 6. Fifth pressure block; 61. Fifth mounting hole; 7. First welded component; 8. Second welded component; 9. Third welded component; 10. Fourth welded component; 110. Fifth welded component; 120. Sixth welded component. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] The following is combined Figures 1-6 Describes the welding fixture according to an embodiment of the present utility model.

[0031] The welding fixture of this embodiment includes a base 1, a first pressure block 2, and a second pressure block 3. The base 1 is provided with a first positioning groove 111 for positioning a first welded component 7. The first pressure block 2 is detachably connected to the base 1. The base 1, the first pressure block 2, and the first welded component 7 disposed in the first positioning groove 111 define a second positioning groove for positioning either a second welded component 8 or a third welded component 9. The second pressure block 3 is detachably connected to the base 1 and is used to press either the second welded component 8 or the third welded component 9.

[0032] According to the welding fixture of this utility model embodiment, a first positioning groove 111 for positioning the first welded part 7 is provided on the base 1. After the first welded part 7 is placed in the first positioning groove 111, the first welded part 7 and the first pressure block 2 can define a second positioning groove for positioning either the second welded part 8 or the third welded part 9. The second pressure block 3 then presses either the second welded part 8 or the third welded part 9 together. Thus, the second welded part 8 can be placed in the second positioning groove to complete the welding with the first welded part 7, or the third welded part 9 can be placed in the second positioning groove to complete the welding with the first welded part 7. This effectively reduces the number of fixture changes during the first welding, thereby effectively improving the efficiency of the first piece inspection.

[0033] It should be noted that a portion of the upper surface of the first welded component 7 forms the bottom surface of the second positioning groove. When the second pressing block 3 presses the second welded component 8 or the third welded component 9, it also presses the first welded component 7, thereby ensuring the relative fixation and positional reliability of either the second welded component 8 or the third welded component 9 with the first welded component 7. In this embodiment, the first welded component 7 is the positive terminal cover plate and the negative terminal cover plate of the battery cell, and one of the second welded component 8 and the third welded component 9 is a bridging aluminum busbar connecting the positive terminal cover plate and the negative terminal cover plate of the battery cell, while the other is a bridging aluminum busbar connecting two adjacent batteries.

[0034] In some embodiments, the base 1 includes a base 11 and a protrusion 12 disposed on the upper surface of the base 11. A first positioning groove 111 is disposed on the base 11. A first pressing block 2 is detachably connected to the base 11 for pressing the first welded part 7. The protrusion 12, the first pressing block 2 and the first welded part 7 disposed in the first positioning groove 111 define a second positioning groove.

[0035] That is, while the first pressure block 2 helps to define the second positioning groove, it also presses the first welded part 7, further ensuring the relative fixation of the first welded part 7 and the base 1, thereby effectively ensuring the welding reliability of either the second welded part 8 or the third welded part 9 with the first welded part 7.

[0036] For example, such as Figure 3 and Figure 4 As shown, the first pressing block 2 is a strip-shaped pressing block, and its length direction is perpendicular to the length direction of the first welded part 7. The first pressing block 2 is pressed against the first end of the first welded part 7 that is opposite to it along its length direction.

[0037] In some embodiments, the first pressing block 2 and the protrusion 12 are arranged along the first direction of the base 11. The first pressing block 2 is provided with a first limiting protrusion 21 on the side facing the protrusion 12. The first limiting protrusion 21 and the protrusion 12 are arranged at intervals along the second direction, which is orthogonal to the first direction. The sides of the first limiting protrusion 21 and the protrusion 12 that are opposite to each other form part of the side of the second positioning groove.

[0038] The first limiting protrusion 21 and the protrusion 12 limit the second welded part 8 and the third welded part 9 in the second direction. The first pressing block 2 positions the second welded part 8 and the third welded part 9 in the first direction by abutting against them. Combined with the pressing of the second pressing block 3 on the second welded part 8 and the third welded part 9, the welding accuracy of either the second welded part 8 or the third welded part 9 with the first welded part 7 is effectively guaranteed.

[0039] For example, such as Figure 3 and Figure 4 As shown, the second positioning groove is generally a U-shaped groove with its opening facing the first direction.

[0040] In some embodiments, there are at least two second pressure blocks 3, and at least one second pressure block 3 presses the opposite ends of either the second welded member 8 or the third welded member 9 along the second direction of the base 1. At least one second pressure block 3 presses the end of either the second welded member 8 or the third welded member 9 away from the first pressure block 2.

[0041] This effectively prevents either the second welded component 8 or the third welded component 9 from warping at one end after being pressed by the second pressure block 3, effectively ensuring the positional reliability of either the second welded component 8 or the third welded component 9 relative to the first welded component 7, and resulting in higher welding accuracy between either the second welded component 8 or the third welded component 9 and the first welded component 7.

[0042] For example, such as Figure 3 and Figure 4 As shown, there are three second pressure blocks 3. One of the second pressure blocks 3 presses against the end of either the second welded part 8 or the third welded part 9 away from the first pressure block 2, and the second pressure block 3 presses against the first end of either the second welded part 8 or the third welded part 9 in the second direction. The other two second pressure blocks 3 press against the second end of either the second welded part 8 or the third welded part 9 in the second direction and are arranged at intervals along the first direction.

[0043] In some embodiments, the base 11 is provided with at least two first threaded holes, the first pressure block 2 is provided with first mounting holes corresponding to the first threaded holes, and the welding fixture further includes a first threaded component that passes through the first mounting hole and is threadedly connected to the corresponding first threaded hole.

[0044] This makes it easy to assemble and disassemble the first pressure block 2, and the setting of at least two first threaded parts effectively ensures the positional reliability of the first pressure block 2 relative to the base 11 after it is connected to the base 11, and the clamping reliability of the first pressure block 2 on the first welded part 7 is higher.

[0045] For example, such as Figure 3 and Figure 4As shown, there are two first threaded holes, which are spaced apart along the second direction. There are two first mounting holes and two first threaded parts. The first mounting hole is a round hole and the first threaded part is a bolt.

[0046] In some embodiments, the protrusion 12 is provided with a second threaded hole, the second pressure block 3 is provided with a second mounting hole 31, and the welding fixture further includes a second threaded member passing through the second mounting hole 31 and threadedly connected to the second threaded hole. The protrusion 12 is provided with a first guide groove 121 extending along a second direction, the second pressure block 3 is slidably fitted in the first guide groove 121, the second threaded hole is provided on the bottom surface of the first guide groove 121, and the second mounting hole 31 is a strip-shaped hole extending along the second direction.

[0047] The second threaded component connects the second pressure block 3 and the protrusion 12, making it easy to assemble and disassemble the second pressure block 3. Furthermore, the first guide groove 121 and the second mounting hole 31 are designed as strip-shaped holes, allowing the second threaded component to remain in place without disengaging from the second threaded hole. Simply driving the second pressure block 3 to slide back and forth along the first guide groove 121 allows it to switch between a pressing position that clamps the second welded parts 8 and 9 and a position that avoids them, effectively preventing the second pressure block 3 from completely disengaging from the protrusion 12 and resulting in part loss.

[0048] For example, such as Figure 3 As shown, the protrusion 12 is provided with two first guide grooves 121, and the two first guide grooves 121 respectively correspond to a second pressure block 3. At the same time, a second pressure block 3 is directly connected to the base 11 through a second threaded part.

[0049] In some embodiments, the welding fixture further includes a third pressure block 4 and a fourth pressure block 5. The third pressure block 4 is detachably connected to the base 1 and is used to press the first welded part 7. The third pressure block 4 and the first welded part 7 disposed in the first positioning groove 111 define a third positioning groove. The third positioning groove is used to position the fourth welded part 10. The fourth pressure block 5 is detachably connected to the third pressure block 4 and is used to press the fifth welded part 110 onto the fourth welded part 10.

[0050] At this time, the welding fixture of this embodiment can also complete the welding of the fourth welding part 10 and the fifth welding part 110, thereby further reducing the number of fixture switching times during the first welding and further improving the efficiency of the first piece inspection.

[0051] For example, such as Figure 5 As shown, a portion of the upper surface of the first welded part 7 forms the bottom surface of the third positioning groove. The third pressure block 4 is disposed above the first welded part 7 and is used to press the first welded part 7. The fifth welded part 110 is located above the fourth welded part 10. The fourth pressure block 5 is disposed above the third pressure block 4 and is used to press the fourth welded part 10 and the fifth welded part 110.

[0052] In some embodiments, the base 1 is provided with at least two third threaded holes, the third pressure block 4 is provided with third mounting holes corresponding to the third threaded holes, and the welding fixture further includes a third threaded component that passes through the third mounting hole and is threadedly connected to the corresponding third threaded hole.

[0053] The third pressure block 4 is connected to the base 1 via a third threaded component, which makes the third pressure block 4 easy to assemble and disassemble. The setting of at least two third threaded components effectively ensures the positional reliability of the third pressure block 4 relative to the base 1 after it is connected to the base 1, and the pressing reliability of the third pressure block 4 on the first welded part 7 is higher.

[0054] For example, a third threaded hole is provided on the upper surface of the base 11 of the base 1. The third pressure block 4 is provided with two third mounting holes and is arranged at intervals along its length. The third mounting holes are round holes.

[0055] In some embodiments, there are two third pressure blocks 4 arranged at intervals along the first direction of the base 11, and the two third pressure blocks 4 are respectively pressed against the two opposite ends of the first welded part 7 along the first direction. Each third pressure block 4 has two second limiting protrusions 41 arranged at intervals along the second direction of the base 11 on the side facing the other third pressure block 4. The second direction is orthogonal to the first direction, and the sides of the two second limiting protrusions 41 facing each other form part of the side of the third positioning groove.

[0056] At this time, the two third pressure blocks 4 limit the fourth welded part 10 in the first direction, and the four second limiting protrusions 41 limit the fourth welded part 10 in the second direction. This makes the position of the fourth welded part 10 relative to the base 11 highly reliable and the welding accuracy of the fourth welded part 10 and the fifth welded part 110 highly accurate.

[0057] For example, such as Figure 5 As shown, four second limiting protrusions 41 are disposed at the four corners of the third positioning groove, and the second limiting protrusions 41 on one of the third pressing blocks 4 and the second limiting protrusions 41 on the other third pressing block 4 are arranged at intervals along the first direction.

[0058] In some embodiments, the fourth pressure block 5 is provided with a fourth mounting hole, the upper surface of the third pressure block 4 is provided with a fourth threaded hole, and the welding fixture further includes a fourth threaded member that passes through the fourth mounting hole and is threadedly connected to the fourth threaded hole. The fourth pressure block 5 is axially pivotable relative to the third pressure block 4 about the fourth threaded hole so that a portion of the fourth pressure block 5 has a first position above the third positioning groove and a second position that avoids the third positioning groove.

[0059] This makes it easy to assemble and disassemble the fourth pressure block 5, and the fourth pressure block 5 does not need to be completely separated from the third pressure block 4 to release the pressure on the fourth welded part 10 and the fifth welded part 110. This allows the fourth welded part 10 and the fifth welded part 110 to be removed after welding, and also effectively prevents the fourth pressure block 5 from losing parts.

[0060] For example, the fourth weldment 10 is a connecting piece, and the fifth connecting frame is a nickel sheet, which consists of two pieces and is adapted to be welded to the two opposite ends of the connecting piece in the second direction.

[0061] In some embodiments, the welding fixture further includes a fifth pressure block 6, which is detachably connected to the base 11 and is used to press the sixth weldment 120 onto the first weldment 7.

[0062] At this time, the welding fixture of this embodiment can also complete the welding of the first welding part 7 and the sixth welding part 120, thereby further reducing the number of fixture switching times during the first welding and further improving the efficiency of the first piece inspection.

[0063] For example, the sixth weldment 120 is a nickel sheet for welding to the pole of the first weldment 7.

[0064] In some embodiments, the fifth pressure block 6 is provided with a fifth mounting hole 61, and the upper surface of the base 11 is provided with a fifth threaded hole. The welding fixture also includes a fifth threaded component that passes through the fifth mounting hole 61 and is threadedly connected to the fifth threaded hole. The protrusion 12 is provided with a second guide groove 122, the fifth pressure block 6 is slidably fitted in the second guide groove 122, the fifth threaded hole is provided on the bottom surface of the second guide groove 122, and the fifth mounting hole 61 is a strip-shaped hole whose length is consistent with the extending direction of the second guide groove 122.

[0065] The fifth threaded component connects the fifth pressure block 6 and the base 11, making it easy to assemble and disassemble the fifth pressure block 6. Furthermore, the second guide groove 122 and the fifth mounting hole 61 are designed as strip-shaped holes, allowing the fifth threaded component to remain in place without disengaging from the fifth threaded hole. Simply driving the fifth pressure block 6 to slide back and forth along the second guide groove 122 allows it to switch between a pressing position that clamps the first welded component 7 and the sixth welded component 120 and a position that avoids them, effectively preventing the fifth pressure block 6 from completely detaching from the base 11 and resulting in component loss.

[0066] For example, such as Figure 6 As shown, the base 11 is provided with a second guide groove 122 extending along the second direction, and the second guide groove 122 is correspondingly matched with a fifth pressure block 6.

[0067] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0070] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A welding fixture, characterized in that, include: The base (1) is provided with a first positioning groove (111) for positioning the first welded part (7); The first pressure block (2) is detachably connected to the base (1). The base (1), the first pressure block (2), and the first welded part (7) disposed in the first positioning groove (111) define a second positioning groove for positioning either the second welded part (8) or the third welded part (9). The second pressure block (3), which is detachably connected to the base (1), is used to press either the second welded part (8) or the third welded part (9).

2. The welding fixture according to claim 1, characterized in that, The base (1) includes a base (11) and a protrusion (12) disposed on the upper surface of the base (11). The first positioning groove (111) is disposed on the base (11). The first pressing block (2) is detachably connected to the base (11) for pressing the first welded part (7). The protrusion (12), the first pressing block (2) and the first welded part (7) disposed in the first positioning groove (111) define the second positioning groove.

3. The welding fixture according to claim 2, characterized in that, The first pressing block (2) and the protrusion (12) are arranged along the first direction of the base (11). The first pressing block (2) is provided with a first limiting protrusion (21) on the side facing the protrusion (12). The first limiting protrusion (21) and the protrusion (12) are arranged at intervals along the second direction, which is orthogonal to the first direction. The sides of the first limiting protrusion (21) and the protrusion (12) opposite to each other form part of the side of the second positioning groove.

4. The welding fixture according to claim 3, characterized in that, There are at least two second pressure blocks (3), and each of the second welded part (8) and the third welded part (9) is pressed against each other at both ends of the base (1) in the second direction. At least one second pressure block (3) presses against the end of the second welded part (8) and the third welded part (9) away from the first pressure block (2).

5. The welding fixture according to claim 2, characterized in that, The base (11) is provided with at least two first threaded holes, and the first pressure block (2) is provided with first mounting holes corresponding to the first threaded holes. The welding fixture also includes a first threaded component that passes through the first mounting hole and is threadedly connected to the corresponding first threaded hole.

6. The welding fixture according to claim 3, characterized in that, The protrusion (12) is provided with a second threaded hole, the second pressure block (3) is provided with a second mounting hole (31), and the welding fixture further includes a second threaded component that passes through the second mounting hole (31) and is threadedly connected to the second threaded hole.

7. The welding fixture according to claim 6, characterized in that, The protrusion (12) is provided with a first guide groove (121) extending along the second direction, the second pressure block (3) is slidably fitted in the first guide groove (121), the second threaded hole is provided on the bottom surface of the first guide groove (121), and the second mounting hole (31) is a strip-shaped hole with a length extending along the second direction.

8. The welding fixture according to any one of claims 2-7, characterized in that, The welding fixture further includes a third pressure block (4) and a fourth pressure block (5). The third pressure block (4) is detachably connected to the base (1) and is used to press the first welded part (7). The third pressure block (4) and the first welded part (7) disposed in the first positioning groove (111) define a third positioning groove. The third positioning groove is used to position the fourth welded part (10). The fourth pressure block (5) is detachably connected to the third pressure block (4) and is used to press the fifth welded part (110) onto the fourth welded part (10).

9. The welding fixture according to claim 8, characterized in that, The base (1) is provided with at least two third threaded holes, and the third pressure block (4) is provided with third mounting holes corresponding to the third threaded holes. The welding fixture also includes a third threaded component that passes through the third mounting hole and is threadedly connected to the corresponding third threaded hole.

10. The welding fixture according to claim 8, characterized in that, There are two third pressure blocks (4) arranged at intervals along the first direction of the substrate (11), and the two third pressure blocks (4) are respectively pressed against the two opposite ends of the first welded part (7) along the first direction; Each of the third pressure blocks (4) has two second limiting protrusions (41) arranged at intervals along the second direction of the base (11) on the side facing the other third pressure block (4). The second direction is orthogonal to the first direction. The sides of the two second limiting protrusions (41) facing each other form part of the side of the third positioning groove.

11. The welding fixture according to claim 8, characterized in that, The fourth pressure block (5) is provided with a fourth mounting hole, and the upper surface of the third pressure block (4) is provided with a fourth threaded hole. The welding fixture also includes a fourth threaded component that passes through the fourth mounting hole and is threadedly connected to the fourth threaded hole. The fourth pressure block (5) is axially pivotable relative to the third pressure block (4) about the fourth threaded hole so that a part of the fourth pressure block (5) has a first position located above the third positioning groove and a second position that avoids the third positioning groove.

12. The welding fixture according to any one of claims 2-7, characterized in that, The welding fixture also includes a fifth pressure block (6), which is detachably connected to the base (11) and is used to press the sixth weldment (120) onto the first weldment (7).

13. The welding fixture according to claim 12, characterized in that, The fifth pressure block (6) is provided with a fifth mounting hole (61), the upper surface of the base (11) is provided with a fifth threaded hole, and the welding fixture also includes a fifth threaded component that passes through the fifth mounting hole (61) and is threadedly connected to the fifth threaded hole.

14. The welding fixture according to claim 13, characterized in that, The protrusion (12) is provided with a second guide groove (122), the fifth pressure block (6) is slidably fitted in the second guide groove (122), the fifth threaded hole is provided on the bottom surface of the second guide groove (122), and the fifth mounting hole (61) is a strip-shaped hole with a length consistent with the extension direction of the second guide groove (122).

Images