Nut welding device

Abstract

The utility model discloses a nut welding device and relates to the technical field of automobile part machining, the nut welding device comprises a mounting rack, a positioning mechanism and a displacement mechanism, the positioning mechanism comprises a first positioning assembly and a second positioning assembly, the first positioning assembly and the second positioning assembly are both movably mounted on the mounting rack, and the displacement mechanism is mounted on the mounting rack. The first positioning assembly is used for limiting horizontal movement of the first workpiece relative to the mounting frame. The second positioning assembly is used for limiting horizontal movement of the second workpiece relative to the mounting frame. The displacement mechanism comprises a first displacement assembly, a second displacement assembly and a third displacement assembly which are sequentially connected, the third displacement assembly is connected with the mounting frame, the displacement mechanism can drive the mounting frame to move in the space, the nut welding device can weld two different types of workpieces after one-time feeding, the function of the nut welding device is enriched, and the working efficiency is improved. And the nut welding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts processing, in particular to a nut welding device. Background Art

[0002] Nut welding is a common welding process in the automobile manufacturing industry. In current automobile manufacturing, most nut welding is done manually, which relies on the operator's personal skills. It not only consumes manpower but also makes it difficult to ensure the welding quality. Therefore, machines are currently commonly used to weld nuts. The existing process is roughly that the operator places the workpiece and the nut on a platform, the platform moves horizontally to the welding station, and the welder welds the nut and the workpiece together. After the welding is completed, the platform returns to the starting position, and the operator removes the processed workpiece, and so on. As a result, the existing nut welding device is not only single in function but also inefficient. Utility Model Content

[0003] The main purpose of the utility model is to provide a nut welding device, aiming to solve the technical problems of the existing nut welding devices having single functions and low efficiency.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a nut welding device, which comprises:

[0005] Mounting frame;

[0006] A positioning mechanism, the positioning mechanism comprising a first positioning assembly and a second positioning assembly, the first positioning assembly and the second positioning assembly are both movably mounted on the mounting frame, the first positioning assembly is used to limit the horizontal movement of the first workpiece relative to the mounting frame, and the second positioning assembly is used to limit the horizontal movement of the second workpiece relative to the mounting frame; the first workpiece and the second workpiece are of different models;

[0007] A displacement mechanism, the displacement mechanism includes a first displacement assembly, a second displacement assembly and a third displacement assembly connected in sequence, the third displacement assembly is connected to the mounting frame, so that the first displacement assembly can drive the mounting frame to move along a first direction, so that the second displacement assembly can drive the mounting frame to move along a second direction, and so that the third displacement assembly can drive the mounting frame to move along a third direction, the first direction, the second direction and the third direction are orthogonal to each other.

[0008] In one embodiment, the first positioning assembly includes a first positioning member and a second positioning member, the first positioning member includes a first positioning pin and a first mounting block connected to each other, the first mounting block is movably mounted on the mounting frame, and the first positioning pin is used to pass through a first positioning hole on the first workpiece; the second positioning member includes a second positioning pin and a second mounting block connected to each other, the second mounting block is movably mounted on the mounting frame, and the second positioning pin is used to pass through a second positioning hole on the first workpiece.

[0009] In one embodiment, the first positioning assembly further includes a first fastener and a second fastener, and the first mounting block and the mounting frame are both detachably connected to the first fastener so that the first fastener can limit the movement of the first mounting block relative to the mounting frame; the second mounting block and the mounting frame are both detachably connected to the second fastener so that the second fastener can limit the movement of the second mounting block relative to the mounting frame.

[0010] In one embodiment, the first mounting block is provided with a first through hole, the mounting frame is provided with a plurality of first threaded holes, the first fastener is provided with a first threaded segment, the first threaded segment can pass through the first through hole and be screwed together with any of the first threaded holes; the second mounting block is provided with a second through hole, the second fastener is provided with a second threaded segment, the second threaded segment can pass through the second through hole and be screwed together with any of the first threaded holes.

[0011] In one embodiment, the first positioning member further includes a first support block, the first support block is connected to the first mounting block, and the first support block is used to support the first workpiece; the second positioning member further includes a second support block, the second support block is connected to the second mounting block, and the second support block is used to support the first workpiece.

[0012] In one embodiment, a first supporting surface is provided at one end of the first supporting block away from the first mounting block, and a shape of the first supporting surface is adapted to a shape of the first workpiece; a second supporting surface is provided at one end of the second supporting block away from the second mounting block, and a shape of the second supporting surface is adapted to a shape of the first workpiece.

[0013] In one embodiment, the mounting frame includes a frame body and a mounting plate connected to each other, the first positioning assembly and the second positioning assembly are both movably mounted on the frame body, and the third displacement assembly is connected to the mounting plate.

[0014] In one embodiment, the frame body includes a first adjustment portion, a second adjustment portion and a mounting portion, the first adjustment portion and the second adjustment portion are both connected to the mounting portion, the first adjustment portion extends along the first direction, the second adjustment portion extends along the second direction, the first positioning component is movably mounted on the first adjustment portion, and the second positioning component is movably mounted on the second adjustment portion.

[0015] In one embodiment, the nut welding device also includes a detection mechanism, which includes a first detection member and a second detection member, the first detection member and the second detection member are both installed on the mounting frame, the first detection member is used to detect the first workpiece, and the second detection member is used to detect the second workpiece.

[0016] In one embodiment, the nut welding device further includes a nut welding machine, and the nut welding machine is used to weld the first nut to the first workpiece, and the nut welding machine is also used to weld the second nut to the second workpiece.

[0017] The technical solution of the utility model positions the first workpiece by a first positioning component, positions the second workpiece by a second positioning component, and then drives the first workpiece to move in space to a welding station for welding by a displacement mechanism. Since both the first workpiece and the second workpiece are located on a mounting frame, after the welding of the first workpiece is completed, it is only necessary to move the second workpiece a little distance to weld the second workpiece, thereby eliminating the steps of moving the first workpiece to a starting position, removing the first workpiece and placing the second workpiece, and then moving the second workpiece from the starting position to the welding station, thereby saving the time spent on welding the first workpiece and the second workpiece, and improving the welding efficiency. Moreover, the first workpiece and the second workpiece can be workpieces of different models, that is, the nut welding device can weld two different models of workpieces after one loading, enriching the function of the nut welding device. Among them, the first workpiece can be an upper plate, and the second workpiece can be a lower plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A structural schematic diagram of an embodiment of a nut welding device provided by the utility model;

[0020] Figure 2A schematic structural diagram of an embodiment of a displacement mechanism, a mounting frame and a positioning mechanism provided by the utility model;

[0021] Figure 3 A schematic structural diagram of an embodiment of a mounting frame and a positioning mechanism provided by the utility model;

[0022] Figure 4 This is a structural schematic diagram of an embodiment of the first positioning member provided by the utility model.

[0023] Description of Figure Numbers:

[0024] 100. Nut welding device; 1. mounting frame; 11. frame body; 111. first adjusting portion; 112. second adjusting portion; 113. mounting portion; 12. mounting plate; 2. positioning mechanism; 21. first positioning assembly; 211. first positioning member; 2111. first positioning pin; 2112. first mounting block; 21121. first through hole; 2113. first supporting block; 2114. first supporting surface; 212. second positioning member; 2121. second positioning pin; 2122. The second mounting block; 2123, the second supporting block; 22, the second positioning assembly; 221, the third positioning member; 222, the fourth positioning member; 3, the displacement mechanism; 31, the first displacement assembly; 32, the second displacement assembly; 33, the third displacement assembly; 4, the detection mechanism; 41, the first detection member; 42, the second detection member; 5, the nut welding machine; 6, the tank chain; 7, the supporting foot; 8, the operation permission indicator light; 9, the enclosure; 10, the grating; 200, the first workpiece; 300, the second workpiece.

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0029] Nut welding is a common welding process in the automobile manufacturing industry. In current automobile manufacturing, most nut welding is manual welding, which relies on the personal skills of the operator, which not only consumes manpower but also makes it difficult to ensure the welding quality. Therefore, machines are generally used to weld nuts. The existing process is roughly that the operator places the workpiece and the nut on a platform, the platform moves horizontally to the welding station, and the nut and the workpiece are welded together by the welder. After the welding is completed, the platform returns to the starting position, and the operator removes the processed workpiece, and so on. The existing nut welding device 100 is not only single in function but also inefficient. The utility model proposes a nut welding device 100.

[0030] See also Figures 1 to 3 In one embodiment of the utility model, the nut welding device 100 includes a mounting frame 1, a positioning mechanism 2 and a displacement mechanism 3. The positioning mechanism 2 includes a first positioning component 21 and a second positioning component 22. The first positioning component 21 and the second positioning component 22 can be movably installed on the mounting frame 1. The first positioning component 21 is used to limit the horizontal movement of the first workpiece 200 relative to the mounting frame 1, and the second positioning component 22 is used to limit the horizontal movement of the second workpiece 300 relative to the mounting frame 1; the first workpiece 200 and the second workpiece 300 are of different models; the displacement mechanism 3 includes a first displacement component 31, a second displacement component 32 and a third displacement component 33 connected in sequence, and the third displacement component 33 is connected to the mounting frame 1 so that the first displacement component 31 can drive the mounting frame 1 to move in the first direction, so that the second displacement component 32 can drive the mounting frame 1 to move in the second direction, and so that the third displacement component 33 can drive the mounting frame 1 to move in the third direction, and the first direction, the second direction and the third direction are orthogonal to each other.

[0031] The technical solution of the utility model positions the first workpiece 200 through the first positioning assembly 21, positions the second workpiece 300 through the second positioning assembly 22, and then drives the first workpiece 200 to move in space to the welding station for welding through the displacement mechanism 3. Since the first workpiece 200 and the second workpiece 300 are both located on the mounting frame 1, after the welding of the first workpiece 200 is completed, it is only necessary to move the second workpiece 300 a little distance to weld the second workpiece 300, eliminating the steps of moving the first workpiece 200 to the starting position, removing the first workpiece 200 and placing the second workpiece 300, and then moving the second workpiece 300 from the starting position to the welding station, thereby saving the time spent on welding the first workpiece 200 and the second workpiece 300, improving the welding efficiency, and the first workpiece 200 and the second workpiece 300 can be workpieces of different models, that is, the nut welding device 100 can weld two different models of workpieces after one loading, enriching the functions of the nut welding device 100. Among them, the first workpiece 200 can be an upper plate, and the second workpiece 300 can be a lower plate. It should be noted that, taking the first positioning component 21 as an example, the first positioning component 21 can be movably installed on the mounting frame 1, wherein the first positioning component 21 can be slidable by cooperating with a slide rail and a slide groove, or the mounting frame 1 can be provided with a positioning protrusion, and the first positioning component 21 is provided with a waist-shaped hole, and the positioning protrusion is located in the waist-shaped hole; the first positioning component 21 can be movably installed on the mounting frame 1, so that the first workpiece 200 of different specifications can be positioned, which expands the application range of the nut welding device 100, so the second positioning component 22 can be movably installed on the mounting frame 1, which also expands the scope of application of the nut welding device 100. The applicable scope of the mother welding device 100; moreover, the first workpiece 200 and the second workpiece 300 can also be workpieces of the same model but different sizes. When a traditional welding device is faced with welding two workpieces of different sizes, after completing the welding of one of the workpieces, it is necessary to adjust the position of the positioning member to adapt to the size of the other workpiece. When the nut welding device 100 is used to weld two workpieces of different sizes, the two workpieces can be positioned by the first positioning component 21 and the second positioning component 22 respectively, eliminating the process of adjusting the positioning member, thereby effectively improving the efficiency of nut welding. It should also be noted that the displacement mechanism 3 can be a three-axis displacement platform or a robotic arm, etc., and the displacement mechanism 3 can be implemented using existing technology. It should also be noted that the first direction is Figure 1 The left and right directions shown, the second direction is Figure 1 The front and rear directions shown are Figure 1 Up and down directions shown.

[0032] In one embodiment, the first positioning assembly 21 includes a first positioning member 211 and a second positioning member 212, the first positioning member 211 includes a first positioning pin 2111 and a first mounting block 2112 connected to each other, the first mounting block 2112 is movably mounted on the mounting frame 1, and the first positioning pin 2111 is used to pass through the first positioning hole on the first workpiece 200; the second positioning member 212 includes a second positioning pin 2121 and a second mounting block 2122 connected to each other, the second mounting block 2122 is movably mounted on the mounting frame 1, and the second positioning pin 2121 is used to pass through the second positioning hole on the first workpiece 200. The first positioning pin 2111 passes through the first positioning hole of the first workpiece 200, and the pin-hole combination is convenient for the operator to operate, and can limit the horizontal movement of the first workpiece 200 relative to the first positioning pin 2111. The second positioning pin 2121 then passes through the second positioning hole of the first workpiece 200. The first positioning pin 2111 and the second positioning pin 2121 are used to jointly position the first workpiece 200, which is used to limit the rotation of the first workpiece 200 relative to the mounting frame 1, thereby improving the stability of the nut welding device 100 in welding the first workpiece 200.

[0033] According to one embodiment of the utility model, the second positioning component 22 includes a third positioning member 221 and a fourth positioning member 222, the third positioning member 221 includes a third positioning pin and a third mounting block connected to each other, the third mounting block is movably mounted on the mounting frame 1, and the third positioning pin is used to pass through the third positioning hole on the second workpiece 300; the fourth positioning member 222 includes a fourth positioning pin and a fourth mounting block connected to each other, the fourth mounting block is movably mounted on the mounting frame 1, and the fourth positioning pin is used to pass through the fourth positioning hole on the second workpiece 300.

[0034] According to another embodiment of the present invention, the first positioning assembly 21 may be an elastic clip, and the elastic clip is used to clamp the first workpiece 200 and the mounting frame 1 , thereby limiting the movement of the first workpiece 200 relative to the mounting frame 1 .

[0035] In one embodiment, the first positioning assembly 21 further includes a first fastener (not shown) and a second fastener (not shown), and the first mounting block 2112 and the mounting frame 1 are both detachably connected to the first fastener, so that the first fastener can limit the movement of the first mounting block 2112 relative to the mounting frame 1; the second mounting block 2122 and the mounting frame 1 are both detachably connected to the second fastener, so that the second fastener can limit the movement of the second mounting block 2122 relative to the mounting frame 1. The first fastener is provided to limit the movement of the first mounting block 2112 relative to the mounting frame 1, and the second fastener is provided to limit the movement of the second mounting block 2122 relative to the mounting frame 1, thereby preventing the first workpiece 200 from moving relative to the mounting frame 1 during the welding process. It should be noted that the first fastener and the second fastener can be positioning pins.

[0036] According to one embodiment of the utility model, the second positioning assembly 22 also includes a third fastener and a fourth fastener, and the third mounting block and the mounting frame 1 are both detachably connected to the third fastener so that the third fastener can limit the movement of the third mounting block relative to the mounting frame 1; the fourth mounting block and the mounting frame 1 are both detachably connected to the fourth fastener so that the fourth fastener can limit the movement of the fourth mounting block relative to the mounting frame 1.

[0037] In one embodiment, the first mounting block 2112 is provided with a first through hole 21121, the mounting frame 1 is provided with a plurality of first threaded holes (not shown in the figure), the first fastener is provided with a first threaded section, the first threaded section can pass through the first through hole 21121 and screw-match with any first threaded hole; the second mounting block 2122 is provided with a second through hole (not shown in the figure), the second fastener is provided with a second threaded section, the second threaded section can pass through the second through hole and screw-match with any first threaded hole. The first fastener and the second fastener can be bolts. Taking the first fastener as an example, the bolt passes through the first through hole 21121 and screw-matches with a first threaded hole, thereby limiting the movement of the first mounting block 2112 relative to the mounting frame 1. This method is not only reliable in positioning, but also easy to adjust the position of the first mounting block 2112.

[0038] See also Figures 2 to 4 In one embodiment, the first positioning member 211 further includes a first support block 2113, which is connected to the first mounting block 2112 and is used to support the first workpiece 200; the second positioning member 212 further includes a second support block 2123, which is connected to the second mounting block 2122 and is used to support the first workpiece 200. Taking the first support block 2113 as an example, the first support block 2113 is provided to provide reliable support for the first workpiece 200, thereby improving the stability of the first workpiece 200 during welding. Therefore, the second support block 2123 can also improve the stability of the first workpiece 200 during welding.

[0039] According to one embodiment of the utility model, the third positioning member 221 also includes a third support block, the third support block is connected to the third mounting block, and the third support block is used to support the second workpiece 300; the fourth positioning member 222 also includes a fourth support block, the fourth support block is connected to the fourth mounting block, and the fourth support block is used to support the second workpiece 300.

[0040] In one embodiment, a first support surface 2114 is provided at one end of the first support block 2113 away from the first mounting block 2112, and the shape of the first support surface 2114 matches the shape of the first workpiece 200; a second support surface is provided at one end of the second support block 2123 away from the second mounting block 2122, and the shape of the second support surface matches the shape of the first workpiece 200. Taking the first support block 2113 as an example, by providing the first support surface 2114, the first support block 2113 can support the first workpiece 200 more stably. Similarly, providing the second support surface can also improve the stability of supporting the first workpiece 200.

[0041] In one embodiment, the mounting frame 1 includes a frame body 11 and a mounting plate 12 connected to each other, the first positioning assembly 21 and the second positioning assembly 22 are both movably mounted on the frame body 11, and the third displacement assembly 33 is connected to the mounting plate 12. The mounting plate 12 is connected to the third displacement assembly 33, which expands the connection area with the third displacement assembly 33 and improves the reliability of the connection between the mounting frame 1 and the third displacement assembly 33.

[0042] In one embodiment, the frame body 11 includes a first adjustment portion 111, a second adjustment portion 112 and a mounting portion 113, the first adjustment portion 111 and the second adjustment portion 112 are both connected to the mounting portion 113, the first adjustment portion 111 extends along the first direction, the second adjustment portion 112 extends along the second direction, the first positioning assembly 21 is movably mounted on the first adjustment portion 111, and the second positioning assembly 22 is movably mounted on the second adjustment portion 112. The first adjustment portion 111 extends along the first direction, and the first positioning assembly 21 is movably mounted on the first adjustment portion 111, so that the position of the first workpiece 200 can be adjusted along the first direction. Similarly, the second adjustment portion 112 extends along the second direction, and the second positioning assembly 22 is movably mounted on the second adjustment portion 112, so that the position of the second workpiece 300 can be adjusted along the second direction, thereby reducing the probability of interference between the first workpiece 200 and the second workpiece 300.

[0043] In one embodiment, the nut welding device 100 further includes a detection mechanism 4, which includes a first detection member 41 and a second detection member 42. The first detection member 41 and the second detection member 42 are both mounted on the mounting frame 1, and the first detection member 41 is used to detect the first workpiece 200, and the second detection member 42 is used to detect the second workpiece 300. The first detection member 41 is set to detect whether the first workpiece 200 is in place. If the first positioning component 21 has completed the positioning of the first workpiece 200, it means that the first workpiece 200 has been placed in place; similarly, the second detection member 42 is set to detect whether the second workpiece 300 is in place. If the second positioning component 22 has completed the positioning of the second workpiece 300, it means that the second workpiece 300 has been placed in place.

[0044] In one embodiment, the nut welding device 100 further includes a nut welding machine 5, which is used to weld the first nut to the first workpiece 200, and the nut welding machine 5 is also used to weld the second nut to the second workpiece 300. Taking the first workpiece 200 as an example, the first nut is welded to the first workpiece 200 by the nut welding machine 5, and the position of the nut welding on the workpiece is controlled by the program displacement mechanism 3, so that the first workpiece 200 is accurately moved to the nut welding machine 5, and the movement accuracy of the first displacement assembly 31, the second displacement assembly 32 and the third displacement assembly 33 can reach 0.1mm, thereby greatly improving the quality of nut welding.

[0045] According to an embodiment of the utility model, the nut welding device 100 further includes a tank chain 6, which is provided to bundle the wire tube, and the nut welding device 100 further includes a plurality of support legs 7, some of which are connected to the first displacement assembly 31 for fixing the displacement mechanism 3, and the remaining support legs 7 are connected to the bottom of the nut welding machine 5 for fixing the nut welding machine 5. The nut welding device 100 further includes a control cabinet, a start button, an operation permission indicator light 8, an enclosure 9 and a grating 10. When the first detection member 41 and the second detection member 42 detect the first workpiece 200 and the second workpiece 300 respectively, the operation permission indicator light 8 lights up, the operator presses the start button, and the control cabinet controls the displacement mechanism 3 according to the program to drive the first workpiece 200 and the second workpiece 300 to move; wherein the enclosure 9 is arranged around the periphery of the displacement mechanism 3 and the nut welding machine 5 to prevent people from entering during the welding process and improve the safety of people, and the grating 10 is connected to the enclosure 9 to detect whether there is a person entering.

[0046] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A nut welding device, characterized in that: include: Mounting frame; A positioning mechanism, the positioning mechanism comprising a first positioning assembly and a second positioning assembly, the first positioning assembly and the second positioning assembly are both movably mounted on the mounting frame, the first positioning assembly is used to limit the horizontal movement of the first workpiece relative to the mounting frame, and the second positioning assembly is used to limit the horizontal movement of the second workpiece relative to the mounting frame; the first workpiece and the second workpiece are of different models; A displacement mechanism, the displacement mechanism includes a first displacement assembly, a second displacement assembly and a third displacement assembly connected in sequence, the third displacement assembly is connected to the mounting frame, so that the first displacement assembly can drive the mounting frame to move along a first direction, so that the second displacement assembly can drive the mounting frame to move along a second direction, and so that the third displacement assembly can drive the mounting frame to move along a third direction, the first direction, the second direction and the third direction are orthogonal to each other.

2. The nut welding device according to claim 1, characterized in that: The first positioning assembly includes a first positioning member and a second positioning member, the first positioning member includes a first positioning pin and a first mounting block connected to each other, the first mounting block is movably mounted on the mounting frame, and the first positioning pin is used to pass through a first positioning hole on the first workpiece; the second positioning member includes a second positioning pin and a second mounting block connected to each other, the second mounting block is movably mounted on the mounting frame, and the second positioning pin is used to pass through a second positioning hole on the first workpiece.

3. The nut welding device according to claim 2, characterized in that: The first positioning assembly also includes a first fastener and a second fastener, and the first mounting block and the mounting frame are both detachably connected to the first fastener so that the first fastener can limit the movement of the first mounting block relative to the mounting frame; the second mounting block and the mounting frame are both detachably connected to the second fastener so that the second fastener can limit the movement of the second mounting block relative to the mounting frame.

4. The nut welding device according to claim 3, characterized in that: The first mounting block is provided with a first through hole, the mounting frame is provided with a plurality of first threaded holes, the first fastener is provided with a first threaded segment, the first threaded segment can pass through the first through hole and be screwed together with any of the first threaded holes; the second mounting block is provided with a second through hole, the second fastener is provided with a second threaded segment, the second threaded segment can pass through the second through hole and be screwed together with any of the first threaded holes.

5. The nut welding device according to claim 2, characterized in that: The first positioning member also includes a first support block, which is connected to the first mounting block and used to support the first workpiece; the second positioning member also includes a second support block, which is connected to the second mounting block and used to support the first workpiece.

6. The nut welding device according to claim 5, characterized in that: A first supporting surface is provided at one end of the first supporting block away from the first mounting block, and the shape of the first supporting surface is adapted to the shape of the first workpiece; a second supporting surface is provided at one end of the second supporting block away from the second mounting block, and the shape of the second supporting surface is adapted to the shape of the first workpiece.

7. The nut welding device according to any one of claims 1 to 6, characterized in that: The mounting frame includes a frame body and a mounting plate that are connected to each other. The first positioning assembly and the second positioning assembly can be movably mounted on the frame body. The third displacement assembly is connected to the mounting plate.

8. The nut welding device according to claim 7, characterized in that: The frame body includes a first adjustment portion, a second adjustment portion and a mounting portion, the first adjustment portion and the second adjustment portion are both connected to the mounting portion, the first adjustment portion extends along the first direction, the second adjustment portion extends along the second direction, the first positioning component is movably mounted on the first adjustment portion, and the second positioning component is movably mounted on the second adjustment portion.

9. The nut welding device according to any one of claims 1 to 6, characterized in that: The nut welding device also includes a detection mechanism, which includes a first detection member and a second detection member. The first detection member and the second detection member are both installed on the mounting frame. The first detection member is used to detect the first workpiece, and the second detection member is used to detect the second workpiece.

10. The nut welding device according to any one of claims 1 to 6, characterized in that: The nut welding device also includes a nut welding machine, which is used to weld the first nut to the first workpiece, and the nut welding machine is also used to weld the second nut to the second workpiece.

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