Welding tool

Abstract

The utility model belongs to the technical field of machining tools, and discloses a welding tool which comprises a base, and the base is provided with a first positioning structure used for positioning a connecting plate and a second positioning structure used for positioning a coil. The first positioning structure comprises a positioning rod, the positioning rod is movably connected to the base, the positioning rod has a limiting state for limiting the connecting plate and a releasing state for releasing the connecting plate, a space for limiting the connecting plate is formed between the positioning rod in the limiting state and the base, and the positioning rod in the limiting state is used for abutting against the end face of the second end of the first lead. After the coil and the connecting plate are both positioned, whether the length of the first lead welded by the coil and the connecting plate is qualified or not can be identified by judging whether the end face of the end, away from the spiral part, of the first lead can just abut against the traction rod or not, the function of identifying the quality of the coil is achieved, the probability of producing unqualified products in the welding process is reduced, and the production efficiency is improved. The scrap cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of processing tools, in particular to a welding tooling. Background Art

[0002] The conductive system is one of the core components of a plastic case circuit breaker, including a connection plate and a coil connected by welding. In the conductive system, the welding process of the connection plate and the coil is a key process, and its welding quality directly affects the quality of the subsequent processes. If the welding quality of the connection plate and the coil is poor, it will affect the overall quality of the conductive system, and then directly affect the service performance of the circuit breaker product such as temperature rise and service life, resulting in defective circuit breaker products.

[0003] The existing welding tooling for welding the connection plate and the coil includes a base, a first positioning seat and a second positioning seat arranged on the base. The coil is positioned by a support column sleeved on the first positioning seat, and the connection plate is positioned by a profiling mechanism on the second positioning seat. Welding can be carried out after the coil and the connection plate are positioned.

[0004] The existing technology has the following defects: The coil includes a spiral coil part and two leads arranged at both ends of the spiral coil part. One of the leads is welded to the connection plate, and the length dimension of this lead has strict requirements, which is related to the welding length between the coil and the connection plate, and then affects the electrical conductivity and temperature rise performance at the welding position. In the above technical solution, although the installation positions of the coil and the connection plate can be positioned, it is difficult to distinguish whether the length of the lead welded to the connection plate is qualified. Too long or too short leads will both cause defects in the conductive system, and the probability of producing defective products during the welding process is relatively high, resulting in an increase in the product scrapping cost.

[0005] Therefore, there is an urgent need for a new welding tooling to solve the above problems existing in the prior art. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a welding tooling that can identify whether the length of the lead welded between the coil and the connection plate is qualified, play a role in identifying the quality of the coil, reduce the probability of producing defective products during the welding process, and reduce the scrapping cost.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] Provide a welding tooling for positioning a coil and a connection plate. The coil includes a spiral part and a first lead. The first end of the first lead is connected to one end of the spiral part, and the second end of the first lead is welded to the connection plate. The welding tooling includes:

[0009] The base is provided with a first positioning structure and a second positioning structure; the first positioning structure is used to position the connecting plate, and the second positioning structure is used to position the coil;

[0010] The first positioning structure includes a positioning rod, which is movably connected to the base. The positioning rod has a limiting state for limiting the connecting plate and a releasing state for releasing the connecting plate. A space for limiting the connecting plate is formed between the positioning rod in the limiting state and the base, and the positioning rod in the limiting state is used to abut against the end face of the second end of the first lead.

[0011] As an optional solution for the welding tool provided by the utility model, the first positioning structure also includes a first positioning groove recessed on the base and adapted to the connecting plate, and the first positioning groove is engaged with the connecting plate; the positioning rod in the limited state at least partially blocks the notch of the first positioning groove to limit the connecting plate from being separated from the first positioning groove, and the positioning rod in the released state avoids the notch.

[0012] As an optional solution of the welding tool provided by the utility model, the first positioning groove and the second positioning structure are arranged at intervals along the first direction; the first positioning groove can limit the connection plate in the first direction and the second direction; the positioning rod in the limit state limits the connection plate in the third direction; the first direction, the second direction and the third direction are perpendicular to each other;

[0013] The base is provided with a guide hole extending along the second direction, and the positioning rod can be slidably inserted into the guide hole; or, the positioning rod is rotatably connected to the base, and the positioning rod is rotatably switched between the limiting state and the releasing state.

[0014] As an optional solution for the welding tool provided by the utility model, the positioning rod includes a rod body and an operating part protruding from the rod body, the rod body can be slidably inserted into the guide hole and is used to abut against the end face of the second end of the first lead, and the operating part is located on one side of the guide hole.

[0015] As an optional solution of the welding tool provided by the utility model, the second positioning structure includes a positioning column, which is adjustably connected to the base along a direction close to or away from the first positioning structure, and the positioning column is used to sleeve the spiral part.

[0016] As an optional solution for the welding tool provided by the utility model, a first waist-shaped hole is provided on the base, and the welding tool also includes a first fastener, which passes through the first waist-shaped hole and is connected to the positioning column, and the position of the first fastener in the first waist-shaped hole is adjustable in a direction close to or away from the first positioning structure.

[0017] As an alternative to the welding tooling provided by the present utility model, a second waist-shaped hole is further provided on the base. The second waist-shaped hole communicates with the first waist-shaped hole. The positioning post is partially located in the second waist-shaped hole and its position in the second waist-shaped hole is adjustable.

[0018] As an alternative to the welding tooling provided by the present utility model, a first identification groove is provided on the positioning rod. The first identification groove includes an identification groove wall and a limiting groove wall arranged at an angle. The identification groove wall is used to abut against the end face of the second end of the first lead, and the limiting groove wall stops against the outer wall of the first lead.

[0019] As an alternative to the welding tooling provided by the present utility model, the coil further includes a second lead, and the second lead is connected to one end of the spiral part away from the first lead;

[0020] The welding tooling further includes a positioning seat, the positioning seat is connected to the base, and the positioning seat is engaged with the second lead.

[0021] As an alternative to the welding tooling provided by the present utility model, a second identification groove is provided on the positioning seat. The groove wall of the second identification groove includes a first identification surface and a second identification surface arranged at an angle. At least one of the first identification surface and the second identification surface is used to fit against the outer wall of the second lead.

[0022] As an alternative to the welding tooling provided by the present utility model, a second positioning groove is provided on the base, and the positioning seat is clamped in the second positioning groove.

[0023] Advantages of the present utility model:

[0024] The utility model provides a welding tooling. When welding the first lead of the connecting plate and the coil, the connecting plate is positioned by the first positioning structure arranged on the base, and the coil is positioned by the second positioning structure on the base, ensuring that the relative positions of the connecting plate and the coil during welding are accurate and meet the design requirements. When positioning the connecting plate, the positioning rod of the first positioning structure is moved relative to the base to the limiting state, and a space for limiting the connecting plate is formed between the positioning rod in the limiting state and the base, so that the connecting plate is reliably limited in this space, avoiding the displacement of the connecting plate during the welding process. Before welding the connecting plate and the first lead, the length of the first lead can be identified through the positioning rod in the limiting state. When both the coil and the connecting plate are positioned, if the end face of the first lead far from the spiral part can just abut against the positioning rod, it indicates that the length of the first lead is qualified. If the end face of the first lead cannot abut against the positioning rod and there is a gap between the first lead and the positioning rod, it indicates that the length of the first lead is too short. If the first lead is bent or inclined relative to the spiral part or other deformation phenomena occur when abutting against the positioning rod, or the first lead cannot abut against the positioning rod due to being too long, it indicates that the length of the first lead exceeds the qualified value. For the situation where the length of the first lead is too long or too short, it can be detected through the positioning rod before welding. After being determined as unqualified, the subsequent welding process is not carried out, reducing the probability of producing unqualified products during the welding process and reducing the scrap cost. The positioning rod in this welding tooling not only has the function of limiting the connecting plate but also has the function of identifying whether the length of the first lead of the coil is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments of the present utility model. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the drawings.

[0026] Figure 1 It is a connection schematic diagram of the connecting plate and the coil provided by the present utility model;

[0027] Figure 2 It is an exploded schematic diagram of the connecting plate and the coil provided by the present utility model;

[0028] Figure 3 It is a schematic diagram of fixing the connecting plate and the coil on the welding tooling provided by the specific embodiment of the present utility model;

[0029] Figure 4 It is a first exploded schematic diagram of the welding tooling, the connecting plate and the coil provided by the specific embodiment of the present utility model;

[0030] Figure 5It is an exploded view of the welding tooling provided by the specific embodiment of the present utility model;

[0031] Figure 6 It is the second exploded view of the welding tooling, the connecting plate and the coil provided by the specific embodiment of the present utility model;

[0032] Figure 7 It is a top view of the base of the welding tooling provided by the specific embodiment of the present utility model.

[0033] In the figure:

[0034] 1. Base; 2. Positioning rod; 3. Positioning seat;

[0035] 11. First positioning groove; 12. Guide hole; 13. Guide seat; 14. Positioning post; 15. First waist-shaped hole; 16. Second waist-shaped hole; 17. Second positioning groove; 18. Connecting hole; 19. Avoidance notch;

[0036] 141. Guide end;

[0037] 21. Rod body; 22. Operating part;

[0038] 210. First identification groove; 2110. Identification groove wall; 2120. Limit groove wall;

[0039] 31. Second identification groove; 311. First identification surface; 312. Second identification surface;

[0040] 100. Coil; 200. Connecting plate;

[0041] 101. Spiral part; 102. First lead; 103. Second lead;

[0042] 1021. First plane; 1022. Second plane;

[0043] 1031. Third plane. Specific embodiment

[0044] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model are shown in the drawings, rather than all structures.

[0045] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0047] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0048] The term "and / or" in this embodiment is merely a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present utility model generally represents an "or" relationship between the front and rear associated objects.

[0049] In the embodiments of the present utility model, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted.

[0050] As Figure 1 and Figure 2 shown, it is a schematic structural diagram of the connection plate 200 and the coil 100 provided in this embodiment. Specifically, it may be the connection plate 200 and the coil 100 in the conductive system of a circuit breaker, or the connection plate 200 and the coil 100 in other devices.

[0051] The coil 100 specifically includes a helical portion 101, a first lead 102, and a second lead 103. The first lead 102 and the second lead 103 are respectively arranged at both ends of the helical portion 101. The first end of the first lead 102 is connected to one end of the helical portion 101, and the second end of the first lead 102 extends away from the helical portion 101 for welding with the connection plate 200; the first end of the second lead 103 is connected to the other end of the helical portion 101, and the second end of the second lead 103 extends away from the helical portion 101 and can be used for welding with other components of the conductive system of the circuit breaker.

[0052] As Figure 3 , Figure 4 and Figure 5 shown, this embodiment provides a welding tooling, which can be used to position and fix the coil 100 and the connection plate 200 when welding the coil 100 and the connection plate 200. At the same time, it can also identify the quality of the coil 100. When the quality of the coil 100 is unqualified, the subsequent welding work is not carried out, avoiding the generation of more unqualified products after welding and reducing the scrap cost.

[0053] Specifically, the welding tooling includes a base 1. The base 1 is provided with a first positioning structure and a second positioning structure; the first positioning structure is used to position the connection plate 200, and the second positioning structure is used to position the coil 100. When welding the connection plate 200 and the first lead 102 of the coil 100, the connection plate 200 is positioned by the first positioning structure provided on the base 1, and the coil 100 is positioned by the second positioning structure on the base 1 to ensure that the relative positions of the connection plate 200 and the coil 100 during welding are accurate and meet the design requirements.

[0054] The first positioning structure includes a positioning rod 2. The positioning rod 2 is movably connected to the base 1, and the positioning rod 2 has a limiting state for limiting the connection plate 200 and a releasing state for releasing the connection plate 200. The positioning rod 2 in the limiting state forms a space for limiting the connection plate 200 with the base 1, and the positioning rod 2 in the limiting state is used to abut against the end face of the second end of the first lead 102.

[0055] When positioning the connection plate 200, the positioning rod 2 of the first positioning structure is moved relative to the base 1 to the limiting state. The positioning rod 2 in the limiting state forms a space for limiting the connection plate 200 with the base 1, so that the connection plate 200 is reliably limited in this space to avoid the displacement of the connection plate 200 during the welding process.

[0056] Before welding the connection plate and the first lead 102, the length of the first lead 102 can be identified by the positioning rod 2 in the limiting state. Specifically, the positioning rod 2 is used to abut against the end face of the second end of the first lead 102. See Figure 4, the end face of the second end of the first lead 102 is a first plane 1021, and the positioning rod 2 is used to abut against the first plane 1021 to determine whether the length of the first lead 102 meets the standard.

[0057] After the coil 100 and the connection plate 200 are both positioned, if the end face of the end of the first lead 102 away from the spiral portion 101 can just abut against the positioning rod 2, it indicates that the length of the first lead 102 is qualified. If the end face of the first lead 102 cannot abut against the positioning rod 2 and there is a gap between the first lead 102 and the positioning rod 2, it indicates that the length of the first lead 102 is too short. If the first lead 102 is bent or tilted relative to the spiral portion 101 and other deformation phenomena occur when abutting against the positioning rod 2, or the first lead 102 cannot abut against the positioning rod 2 due to being too long, it indicates that the length of the second lead 103 exceeds the qualified value. For the situation where the length of the first lead 102 is too long or too short, it can be detected by the positioning rod 2 before welding. After being determined as unqualified, the subsequent welding process is not carried out, reducing the probability of producing unqualified products during the welding process and lowering the scrap cost.

[0058] The positioning rod 2 in the welding tooling provided in this embodiment not only has the function of limiting the connection plate 200, but also has the function of identifying whether the length of the first lead 102 of the coil 100 is qualified. On the premise of ensuring the functions of limiting the connection plate 200 and identifying whether the length of the first lead 102 of the coil 100 is qualified, the number of parts used in the welding tooling is reduced, making the welding tooling structure simpler, more convenient to manufacture, higher in assembly efficiency and less in occupied space.

[0059] See Figure 4 , second planes 1022 are provided on both opposite sides of the first lead 102, and one of the second planes 1022 is used to be attached to and welded with the connection plate 200.

[0060] In some embodiments, see Figure 3 , Figure 4 and Figure 5 , the first positioning structure further includes a first positioning groove 11 recessed in the base 1 and adapted to the connection plate 200. The first positioning groove 11 is engaged with the connection plate 200 to position and limit the movement of the connection plate 200. The first positioning groove 11 is directly opened on the base 1, with a simple structure and easy to implement.

[0061] In some other embodiments, the first positioning structure may include a positioning plate. The positioning plate is on the base 1, such as being installed on the base 1 by screws, and a first positioning groove 11 for clamping the connection plate 200 is provided on the positioning plate.

[0062] In this embodiment, the positioning rod 2 in the limiting state at least partially blocks the notch of the first positioning groove 11 to limit the separation of the coupling plate 200 from the first positioning groove 11, further strengthening the limiting and fixing effect on the coupling plate 200 and effectively improving the fixing stability of the coupling plate 200. The positioning rod 2 in the release state avoids the notch of the first positioning groove 11 to facilitate placing the coupling plate 200 into the first positioning groove 11.

[0063] See Figure 3 , Figure 4 and Figure 5 , the first positioning groove 11 and the second positioning structure are arranged at intervals along the first direction. After the coil 100 and the coupling plate 200 are positioned, they are arranged along the first direction. The first positioning groove 11 can limit the coupling plate 200 in the first direction and the second direction; the positioning rod 2 in the limiting state limits the coupling plate 200 in the third direction; the first direction, the second direction, and the third direction are perpendicular to each other pairwise. By limiting the coupling plate 200 in three mutually perpendicular directions, while ensuring the positioning accuracy of the coupling plate 200, it can also ensure the fixing stability of the coupling plate 200, avoiding the movement of the coupling plate 200 during the welding process, thereby contributing to improving the welding quality.

[0064] The first positioning groove 11 includes two first groove side walls arranged oppositely along the second direction, and a second groove side wall is connected between the two first groove side walls. The second groove side wall, the two first groove side walls, and the bottom wall of the first positioning groove 11 enclose to form the above-mentioned first positioning groove 11. One end of the coupling plate 200 can abut against the second groove side wall, and the other end is used for welding with the first lead 102. The second groove side wall and the two first groove side walls respectively limit and block the coupling plate 200 in the first direction and the second direction.

[0065] In some embodiments, a guiding hole 12 extending along the second direction is provided on the base 1, and the positioning rod 2 is slidably inserted into the guiding hole 12 to realize the sliding switch of the positioning rod 2 between the limiting state and the release state. See Figure 3 , the positioning rod 2 is in the limiting state, located above the coupling plate 200, and can limit the coupling plate 200 from separating from the first positioning groove 11. The positioning rod 2 slides away from the first positioning groove 11 along the second direction to switch to the release state.

[0066] The positioning rod 2 in the limiting state can be kept in this position under the limiting action of the hole wall of the guiding hole 12, and its position in the first direction will not change, so as to facilitate identifying whether the length of the first lead 102 is qualified.

[0067] Furthermore, a guiding seat 13 protrudes from the base 1, and the guiding hole 12 is opened on the guiding seat 13.

[0068] In some other embodiments, the positioning rod 2 can also be rotatably connected to the base 1 so that the positioning rod 2 can be rotated and switched between a limited state and a released state. Further, a stop boss can be provided on the base 1. When the positioning rod 2 rotates to abut against the stop boss, the positioning rod 2 is in a limited state. While limiting the connecting plate 200 in the third direction, it can be determined whether the length of the first lead 102 is qualified.

[0069] The base 1 in this embodiment is approximately a rectangular flat plate. Exemplarily, the length direction and the width direction of the base 1 are the first direction and the second direction respectively, and the thickness direction of the base 1 is the third direction.

[0070] See Figure 4 and Figure 5 As shown in and, the positioning rod 2 includes a rod body 21 and an operation part 22 protruding from the rod body 21. The rod body 21 is slidably disposed through the guide hole 12 and is used to abut against the end face of the second end of the first lead 102. The operation part 22 is located on one side of the guide hole 12. By means of the operation part 22, it is convenient to push the positioning rod 2 to slide along the second direction, and the operation is more convenient. Moreover, due to the existence of the operation part 22, when the rod body 21 slides in the reverse direction of the direction where the operation part 22 is located, it can prevent the rod body 21 from completely disengaging from the guide hole 12.

[0071] In this embodiment, an operation part 22 protrudes from one end of the rod body 21, and the whole positioning rod 2 is an L-shaped rod, which is convenient to manufacture and convenient to push the positioning rod 2 to slide.

[0072] See Figure 5 and Figure 6 As shown in, on the rod body 21 of the positioning rod 2, a first identification groove 210 is provided. The first identification groove 210 includes an identification groove wall 2110 and a limiting groove wall 2120 arranged at an angle. The identification groove wall 2110 is used to abut against the end face of the second end of the first lead 102 (i.e., the first plane 1021). If the first plane 1021 exactly abuts against the identification groove wall 2110 and the first lead 102 does not bend or shift, it indicates that the length of the first lead 102 is qualified. The limiting groove wall 2120 abuts against the outer wall of the first lead 102. After the coil 100 is positioned, the abutment of the limiting groove wall 2120 can prevent the first lead 102 from moving to one side.

[0073] See Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in, the second positioning structure includes a positioning column 14. The positioning column 14 is connected to the base 1 in a position-adjustable manner along the direction of approaching or departing from the first positioning structure. The positioning column 14 is used to sleeved with the spiral part 101. That is, the positioning column 14 is connected to the base 1 in a position-adjustable manner along the first direction.

[0074] When positioning the coil 100, the helical portion 101 of the coil 100 is sleeved on the positioning post 14 to ensure that the coil 100 will not shift during the welding process, facilitating subsequent welding. Since the positioning post 14 can be relatively close to or far from the first positioning groove 11, in actual operation, the position of the positioning post 14 can be finely adjusted according to the qualified length of the first lead 102 of the coil 100 to adapt to welding dimensions with different requirements.

[0075] Specifically, referring to Figure 5 and Figure 7 , a first waist-shaped hole 15 is provided on the base 1. The welding fixture further includes a first fastener that passes through the first waist-shaped hole 15 and is connected to the positioning post 14 for fixing the positioning post 14 on the base 1. The first fastener is position-adjustable in the direction (i.e., the first direction) close to or far from the first positioning structure within the first waist-shaped hole 15, thereby realizing the position adjustment of the positioning post 14 in the first direction.

[0076] The first fastener is exemplarily a screw, which passes through the first waist-shaped hole 15 from bottom to top and is screwed into the threaded hole at the bottom of the positioning post 14. After adjusting the position of the positioning post 14 relative to the first positioning groove 11, the screw can be tightened to fix the positioning post 14.

[0077] Continuing to refer to Figure 5 and Figure 7 , a second waist-shaped hole 16 is also provided on the base 1. The second waist-shaped hole 16 communicates with the first waist-shaped hole 15. The positioning post 14 is partially located within the second waist-shaped hole 16 and is position-adjustable within the second waist-shaped hole 16. Since the positioning post 14 is partially located within the second waist-shaped hole 16, the installation stability of the positioning post 14 can be improved. Moreover, when the positioning post 14 is adjusted within the second waist-shaped hole 16, the upper surface of the base 1 will not be scratched, avoiding damage to the coil 100 due to scratches on the upper surface of the base 1.

[0078] Alternatively, in other embodiments, only the first waist-shaped hole 15 may be provided. The first waist-shaped hole 15 penetrates the base 1 along the thickness direction of the base 1. At this time, the bottom surface of the positioning post 14 contacts the upper surface of the base 1.

[0079] Furthermore, referring to Figure 5 and Figure 6 , a tapered guiding end 141 is further provided at the upper end of the positioning post 14 to facilitate the smooth sleeving of the helical portion 101 of the coil 100 on the positioning post 14.

[0080] In other embodiments, the second positioning structure may also include a seat body, which is connected to the base 1, and a positioning post 14 is provided on the seat body.

[0081] In this embodiment, referring to Figure 3 , Figure 4 , Figure 5 andFigure 6 The welding fixture further includes a positioning seat 3, which is connected to the base 1, and the positioning seat 3 engages with the second lead 103. By engaging the positioning seat 3 with the second lead 103, the position of the second lead 103 can be positioned, further ensuring the positioning accuracy of the coil 100.

[0082] Further, a second identification groove 31 is provided on the positioning seat 3, and the second lead 103 can be engaged in the second identification groove 31 to achieve positioning and fixing. Combining the foregoing content, the spiral portion 101 of the coil 100 is sleeved on the positioning post 14, the end of the first lead 102 engages with the first identification groove 210, and if the length of the first lead 102 is qualified, the first plane 1021 just abuts against the wall of the identification groove 2110, and the second lead 103 engages with the second identification groove 31 to achieve positioning. The restrictions of the first identification groove 210 and the second identification groove 31 can also prevent the coil 100 from rotating.

[0083] See Figure 4 、 Figure 5 and Figure 6 The groove wall of the second identification groove 31 includes a first identification surface 311 and a second identification surface 312 arranged at an angle, and at least one of the first identification surface 311 and the second identification surface 312 is used to fit with the outer wall of the second lead 103. On the one hand, the fitting of the first identification surface 311 and the second identification surface 312 with the second lead 103 respectively helps to improve the positioning accuracy and limit stability of the coil 100; on the other hand, by determining the fitting degree of the second lead 103 with the first identification surface 311 and / or the second identification surface 312, it can be judged whether the shape of the second lead 103 meets the standard, that is, whether the second lead 103 has defects such as bending and offset.

[0084] Specifically, after the spiral portion 101 of the coil 100 is sleeved on the positioning post 14, the second lead 103 just fits with the first identification surface 311 and the second identification surface 312. Referring to the direction in Figure 3 When the second lead 103 is bent to the left or right, it cannot completely fit with the first identification surface 311. Third planes 1031 are provided on both opposite sides of the second lead 103, and the third planes 1031 can be flush with the first identification surface 311. If the third planes 1031 cannot be flush with the first identification surface 311, it indicates that the second lead 103 is bent to the left or right. When the second lead 103 is bent forward or backward, it cannot be completely aligned and fitted with the second identification surface 312.

[0085] Further, the width of the first identification surface 311 can be designed to be approximately the same as the width of the second lead 103. In this way, by observing the alignment degree of the edge of the second lead 103 with the first identification surface 311, it can also be judged whether the second lead 103 is bent in the front-back direction.

[0086] In summary, the positioning seat 3 functions to identify whether the second lead 103 has a bending defect. If it is detected through the first identification surface 311 and the second identification surface 312 that the second lead 103 is bent, the subsequent welding process is not carried out.

[0087] See Figure 5 and Figure 7 As shown in and, a second positioning groove 17 is provided on the base 1, and the positioning seat 3 is clamped in the second positioning groove 17 to accurately position the installation position of the positioning seat 3 on the base 1, realizing rapid assembly and ensuring the stability of the positioning seat 3 after installation. A connecting hole 18 is provided on the bottom wall of the second positioning groove 17. A second fastener passes through the connecting hole 18 and is connected to the bottom of the positioning seat 3 to fix the positioning seat 3 to the base 1.

[0088] Exemplarily, the second fastener is a screw, and the screw passes through the connecting hole 18 from bottom to top and is screwed into the threaded hole at the bottom of the positioning seat 3.

[0089] See Figure 5 and Figure 7 As shown in and, an avoidance notch 19 is further provided on the base 1, and the welding position of the first lead 102 and the connection plate 200 is opposite to the avoidance notch 19, facilitating the welding operation.

[0090] For the welding tooling provided in this embodiment, before welding, the connection plate 200 is placed in the first positioning groove 11 on the base 1 so that the connection plate 200 fits against the groove wall of the first positioning groove 11 to position and fix the connection plate 200; the spiral portion 101 of the coil 100 is sleeved on the positioning post 14, and the second lead 103 of the coil 100 is snapped into the second identification groove 31 to position and fix the coil 100. The positioning rod 2 is slid along the guiding hole 12 to the limiting state to prevent the connection plate 200 from disengaging from the first positioning groove 11 and strengthen the fixing effect on the connection plate 200.

[0091] The positioning rod 2 connected to the base 1 can identify whether the length of the first lead 102 of the coil 100 is qualified, and the positioning seat 3 connected to the base 1 can identify whether the second lead 103 of the coil 100 is bent or deformed, etc., functioning to identify the quality of the coil 100, reducing the probability of producing unqualified products during the welding process and reducing the scrap cost.

[0092] Moreover, the first positioning groove 11 and the positioning post 14 in this embodiment are directly provided on the base 1, with a simpler structure and high manufacturing efficiency. Exemplarily, the entire base 1 can be integrally formed, improving the production efficiency of the entire welding tooling.

[0093] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A welding fixture for positioning a coil (100) and a connection plate (200), wherein the coil (100) includes a spiral portion (101) and a first lead (102), a first end of the first lead (102) is connected to one end of the spiral portion (101), and a second end of the first lead (102) is welded to the connection plate (200); characterized in that, The welding tool comprises: A base (1) is provided with a first positioning structure and a second positioning structure; the first positioning structure is used to position the connecting plate (200), and the second positioning structure is used to position the coil (100); The first positioning structure comprises a positioning rod (2), the positioning rod (2) being movably connected to the base (1), the positioning rod (2) having a limiting state for limiting the connecting plate (200) and a releasing state for releasing the connecting plate (200), a space for limiting the connecting plate (200) is formed between the positioning rod (2) in the limiting state and the base (1), and the positioning rod (2) in the limiting state is used to abut against the end face of the second end of the first lead (102).

2. The welding tooling according to claim 1, characterized in that, The first positioning structure also includes a first positioning groove (11) recessed on the base (1) and adapted to the connecting plate (200), the first positioning groove (11) being engaged with the connecting plate (200); the positioning rod (2) in the limited state at least partially blocks the notch of the first positioning groove (11) to limit the connecting plate (200) from leaving the first positioning groove (11), and the positioning rod (2) in the released state avoids the notch.

3. The welding tooling according to claim 2, wherein, The first positioning groove (11) and the second positioning structure are arranged at intervals along a first direction; the first positioning groove (11) can limit the connection plate (200) in the first direction and the second direction; the positioning rod (2) in the limited state limits the connection plate (200) in a third direction; the first direction, the second direction and the third direction are perpendicular to each other; The base (1) is provided with a guide hole (12) extending along the second direction, and the positioning rod (2) can be slidably inserted into the guide hole (12); or, the positioning rod (2) is rotatably connected to the base (1), and the positioning rod (2) is rotatably switched between the limiting state and the releasing state.

4. The welding tooling according to claim 3, wherein The positioning rod (2) comprises a rod body (21) and an operating portion (22) protruding from the rod body (21); the rod body (21) can be slidably inserted into the guide hole (12) and is used to abut against the end surface of the second end of the first lead wire (102); the operating portion (22) is located on one side of the guide hole (12).

5. The welding tooling according to claim 1, characterized in that, The second positioning structure comprises a positioning column (14), the positioning column (14) being adjustably connected to the base (1) in a direction approaching or moving away from the first positioning structure, and the positioning column (14) being used for sleeve-mounting the spiral portion (101).

6. The welding tooling according to claim 5, characterized in that, The base (1) is provided with a first waist-shaped hole (15), and the welding tool also includes a first fastener, the first fastener passes through the first waist-shaped hole (15) and is connected to the positioning column (14), and the position of the first fastener in the first waist-shaped hole (15) is adjustable in a direction close to or away from the first positioning structure.

7. The welding tooling according to claim 6, wherein A second waist-shaped hole (16) is further provided on the base (1). The second waist-shaped hole (16) communicates with the first waist-shaped hole (15). A part of the positioning post (14) is located in the second waist-shaped hole (16), and its position in the second waist-shaped hole (16) is adjustable.

8. The welding tooling according to any one of claims 1-7, characterized in that, A first identification groove (210) is provided on the positioning rod (2). The first identification groove (210) includes an identification groove wall (2110) and a limiting groove wall (2120) arranged at an angle. The identification groove wall (2110) is used to abut against the end face of the second end of the first lead (102), and the limiting groove wall (2120) stops against the outer wall of the first lead (102).

9. The welding tooling according to any one of claims 1-7, characterized in that, The coil (100) further includes a second lead (103). The second lead (103) is connected to one end of the spiral part (101) away from the first lead (102). The welding tooling further includes a positioning seat (3). The positioning seat (3) is connected to the base (1), and the positioning seat (3) engages with the second lead (103).

10. The welding tooling according to claim 9, wherein, A second identification groove (31) is provided on the positioning seat (3). The groove wall of the second identification groove (31) includes a first identification surface (311) and a second identification surface (312) arranged at an angle. At least one of the first identification surface (311) and the second identification surface (312) is used to fit against the outer wall of the second lead (103).

11. The welding tooling according to claim 9, characterized in that, A second positioning groove (17) is provided on the base (1). The positioning seat (3) is clamped in the second positioning groove (17).

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