A welding tool for helical coil spring and a method for manufacturing the helical coil spring

Abstract

The present invention provides a welding tool for a bevel coil spring and a method for manufacturing the bevel coil spring, belonging to the technical field of implantable medical devices, wherein the welding tool comprises: a fixing seat, a positioning boss arranged on the surface, and a groove formed around the positioning boss, the side surface of the positioning boss comprises: a first arc surface, a second plane, and a second arc surface and a third arc surface connecting the first arc surface and the second plane at both ends; the welding tool of the present invention can fix the linear spring through the cooperation of the groove and the positioning boss, can make the welding areas at both ends of the linear spring in the same linear state, can make the linear spring more convenient to be butt-jointed or overlap-welded, thereby improving the product quality of the bevel coil spring.

Description

Technical Field

[0001] The present disclosure relates to the technical field of implantable medical devices, and in particular to a welding tool for a canted coil spring and a method for manufacturing the canted coil spring. Background Art

[0002] Due to its unique structure, the helical coil spring is a key component of electrical contacts in the field of implantable medical devices, so the manufacturing process of the helical coil spring is very demanding. The production process of the helical coil spring is generally to first wind it into a straight length of helical coil spring, and then bend and weld it into a ring shape, but the bending process can easily cause the spring to deform, and the welding process requires delicate operation, without special tooling, the welding quality is not high. Summary of the invention

[0003] Therefore, the present disclosure provides a welding tool for a canted coil spring of an electrical contact and a method for manufacturing the canted coil spring using the welding tool.

[0004] In order to solve the above technical problems, the present disclosure provides a welding tool for a canted coil spring, comprising: a fixed seat, a positioning boss arranged on the surface, and a groove formed around the positioning boss, the side surface of the positioning boss comprising: a first arc surface, a second plane, and a second arc surface and a third arc surface connecting the two ends of the first arc surface and the second plane, and the groove has a straight line segment area outside the second plane.

[0005] As a preferred solution, the groove includes a groove section formed by the positioning boss and the movable slider.

[0006] As a preferred solution, the movable slider comprises:

[0007] The first slider is slidably disposed on the fixing seat in the direction of the second plane of the positioning boss. One end of the first slider facing the second plane of the positioning boss has a first plane. The first slider and the positioning boss form the groove section.

[0008] As a preferred solution, the movable slider comprises:

[0009] The first slider can be slidably disposed on the fixed seat in the direction of the second plane of the positioning boss, the first slider has a first plane facing the second plane of the positioning boss, a second abutting surface facing the second arc surface of the positioning boss, and a third abutting surface facing the third arc surface of the positioning boss, and the first slider and the positioning boss form the groove section.

[0010] As a preferred solution, the movable slider further comprises:

[0011] A third sliding block is slidably disposed on the fixing seat and is located on a side of the positioning boss adjacent to the first sliding block, the third sliding block having a second abutting surface facing the positioning boss;

[0012] a fourth slider, slidably disposed on the fixing seat and located on the other side of the positioning boss adjacent to the first slider, the fourth slider having a third abutting surface facing the positioning boss,

[0013] The third sliding block, the fourth sliding block and the positioning boss form the groove section.

[0014] As a preferred solution, the movable slider further comprises:

[0015] The second slider can be slidably arranged on the fixed seat in the direction of the first arc surface of the positioning boss. The end of the second slider facing the first arc surface of the positioning boss has a first abutment surface, and horizontal placement surfaces are respectively provided on both sides of the first abutment surface. The second slider and the positioning boss form the groove section.

[0016] As a preferred solution, a vertical third plane is connected between the first arc surface and the second arc surface of the positioning boss, and a vertical fourth plane is connected between the first arc surface and the third arc surface;

[0017] The arc-shaped groove surface of the second sliding block has a fifth plane and a sixth plane respectively extending vertically upward at both ends thereof and adapted to cooperate with the third plane and the fourth plane.

[0018] As a preferred solution, it also includes:

[0019] The pressing plate is suitable for being pressed on the upper surface of the positioning boss, and the pressing plate has a avoiding groove at the second plane area of ​​the positioning boss.

[0020] As a preferred solution, it further comprises: a cover plate, which is arranged on the upper surface of the fixing seat and has a avoidance frame exposing the positioning boss, and both sides of the avoidance frame respectively have clamping grooves suitable for embedding the pressing plate.

[0021] The present disclosure also provides a method for manufacturing a canted coil spring, using a welding tool for a canted coil spring according to any one of the above schemes, comprising the following steps:

[0022] A straight spring is provided for making a canted coil spring;

[0023] The linear spring is placed in a groove formed around the positioning boss of the welding tool, and both ends of the linear spring are located in the straight section area of ​​the groove;

[0024] The two ends of the linear spring are butt-jointed or overlapped by welding.

[0025] The present disclosure also provides a method for manufacturing a canted coil spring, using a welding tool for a canted coil spring according to any one of the above schemes, comprising the following steps:

[0026] A straight spring is provided for making a canted coil spring;

[0027] Placing the linear spring in a groove formed around the positioning boss of the welding fixture, and making the two ends of the linear spring located in the straight section area of ​​the groove;

[0028] Driving the first slider to move toward the positioning boss so that the two ends of the linear spring are parallel and opposite to each other;

[0029] The two ends of the linear spring are butt-jointed or overlapped by welding.

[0030] The present disclosure also provides a method for manufacturing a canted coil spring, using a welding tool for a canted coil spring according to any one of the above schemes, comprising the following steps:

[0031] placing a linear spring on the horizontal placement surface of the second slide block;

[0032] Slide the second slider upwards, so that the middle part of the linear spring is bent toward the arc-shaped groove surface under the action of the positioning boss, and under the action of the vertical planes at both ends of the arc-shaped groove surface, the two ends of the linear spring remain in a vertically upward state;

[0033] The third slider and the fourth slider are driven to move toward the positioning boss at the same time, and the two ends of the linear spring are bent toward the second plane direction of the positioning boss through the action of the third slider and the fourth slider;

[0034] Driving the first slider to move toward the positioning boss so that the two ends of the linear spring are parallel and opposite to each other;

[0035] The linear spring is made to form a ring around the periphery of the positioning boss, and the two ends of the linear spring are located in the straight section area of ​​the groove;

[0036] The two ends of the linear spring are butt-jointed or overlapped by welding.

[0037] The present disclosure also provides a method for manufacturing a canted coil spring, using a welding tool for a canted coil spring according to any one of the above schemes, comprising the following steps:

[0038] placing a linear spring on the horizontal placement surface of the second slide block;

[0039] Slide the second slider upwards, so that the middle part of the linear spring is bent toward the arc-shaped groove surface under the action of the positioning boss, and under the action of the vertical planes at both ends of the arc-shaped groove surface, the two ends of the linear spring remain in a vertically upward state;

[0040] The third slider and the fourth slider are driven to move toward the positioning boss at the same time, and the two ends of the linear spring are bent toward the second plane direction of the positioning boss through the action of the third slider and the fourth slider;

[0041] Driving the first slider to move toward the positioning boss so that the two ends of the linear spring are parallel and opposite to each other;

[0042] The cover plate is arranged on the upper surface of the fixing seat;

[0043] The pressing plate is pressed onto the upper surface of the positioning boss, and the pressing plate is embedded into the clamping groove of the cover plate to form a clamping connection;

[0044] The linear spring is made to form a ring around the periphery of the positioning boss, and the two ends of the linear spring are located in the straight section area of ​​the groove;

[0045] The two ends of the linear spring are butt-jointed or overlapped by welding.

[0046] The disclosed technical solution has the following advantages:

[0047] 1. The welding tool for the helical coil spring provided by the present invention is used to weld the linear spring into annular spring. The spring can be directly bent and then installed into the groove. The linear spring can be fixed by the cooperation of the groove and the positioning boss. The welding areas at both ends of the linear spring can be placed in the same straight line state. When the linear spring is butt-jointed or overlapped, it can be more convenient, thereby improving the product quality of the helical coil spring.

[0048] 2. The welding tooling for the canted coil spring provided by the present invention has a groove section whose width can be adjusted by a movable slider. After the width of the groove section is widened, it is convenient to place the linear spring, and the linear spring is fixed by mechanical means through the movable slider, which can avoid manual uncertainty and ensure that the linear spring is not damaged.

[0049] 3. The welding tooling for the helical coil spring provided by the present invention forms the groove by relative sliding of a plurality of sliders toward the positioning boss. When bending the linear spring, there is no need for manual bending, thus avoiding the problem of uneven bending of the linear spring.

[0050] 4. The welding tooling for the canted coil spring provided by the present invention has a horizontal placement surface on the second slider for horizontally placing the linear spring, and a recessed first abutting surface in the middle of the horizontal placement surface. When the second slider moves toward the positioning boss, the linear spring is pressed down by the positioning boss, and the middle part of the linear spring enters the first abutting surface, and both sides are bent upward at the same time, thereby completing the first step of bending of the linear spring, avoiding manual operation and ensuring the consistency of bending.

[0051] 5. The welding tool for the helical coil spring provided by the present invention has a second arc surface and a third arc surface at both ends of the second plane of the positioning boss, respectively, and a vertical third plane between the second arc surface and the first arc surface, and a vertical fourth plane between the third arc surface and the first arc surface; after the linear spring is bent in the first step by the second slider, due to the existence of the third plane and the fourth plane, both ends of the linear spring are kept in a vertical state, and then the third slider and the fourth slider are moved to make the two ends of the linear spring be bent in the second step along the second arc surface and the third arc surface of the positioning boss respectively, so that both ends of the linear spring can be abutted against the second plane of the positioning boss, thereby completing the bending of the linear spring.

[0052] 6. The welding tool for the helical coil spring provided by the present disclosure also has a pressure plate suitable for being pressed on the positioning boss, and the bent linear spring is positioned by the pressure plate to avoid the linear spring from popping out.

[0053] 7. The method for making the helical coil spring provided in the present invention is to bend the linear spring through the welding tool described in any one of the above schemes, and then weld it to form a helical coil spring. In the process of bending the linear spring into a ring shape, the risk of deformation can be reduced and the quality can be more guaranteed. When welding the two ends of the linear spring, the spring in the welding area is in a linear state, which makes welding more convenient. The welding joint can be either overlapped or butt-jointed, and can adapt to various welding forms. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0055] Figure 1 It is a three-dimensional structural explosion diagram of an embodiment of the welding tool disclosed in the present invention.

[0056] Figure 2 for Figure 1 Magnified view of area A.

[0057] Figure 3 It is a schematic diagram of the three-dimensional structure of each slider in the welding tooling when it is in the initial position.

[0058] Figure 4 Schematic diagram of the three-dimensional structure of the canted coil spring.

[0059] Figure 5 This is the front view of the canted coil spring.

[0060] Figure 6 This is the main view of the positioning boss.

[0061] Figure 7 It is a schematic front view of one end of the second sliding block facing the positioning boss.

[0062] Figure 8 It is a schematic front view of one end of the first slider, the third slider and the fourth slider facing the positioning boss.

[0063] Fig. 9 This is the front view of the inserted linear spring.

[0064] Fig.10 This is the main view after moving the second slider.

[0065] Fig.11 This is the main view after moving the third and fourth sliders.

[0066] Fig.12 This is the main view after moving the first slider.

[0067] Fig.13 It is a schematic diagram of the three-dimensional structure of the cover pressure plate.

[0068] Description of reference numerals:

[0069] 1. Fixed seat; 2. Cover plate; 3. Pressing plate; 4. Avoidance groove; 5. Avoidance frame; 6. Clamping groove; 7. Positioning boss; 8. First slider; 9. Second slider; 10. Third slider; 11. Fourth slider; 12. Straight segment; 13. First plane; 14. Second plane; 15. First abutting surface; 16. Second abutting surface; 17. Third abutting surface; 18. Horizontal placement surface; 19. First arc surface; 20. Second arc surface; 21. Third arc surface; 22. Third plane; 23. Fourth plane; 24. Fifth plane; 25. Sixth plane; 26. Welding point. DETAILED DESCRIPTION

[0070] The technical solution of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0071] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, 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 therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0072] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0073] In addition, the technical features involved in the different embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

[0074] Example 1

[0075] This embodiment provides a specific implementation of a welding tool for a canted coil spring, such as Figure 1 , Figure 2 As shown, it comprises: a fixing seat 1, and a positioning boss 7 is arranged on the surface of the fixing seat 1.

[0076] like Figure 3 As shown, the side surface of the positioning boss 7 includes: a first arc surface 19 , a second plane 14 , and a second arc surface 20 and a third arc surface 21 connecting the first arc surface 19 and the second plane 14 .

[0077] like Figure 2 As shown, a groove is formed on the fixing seat 1 around the positioning boss 7 , and the groove has a straight line segment 12 area outside the second plane 14 .

[0078] When in use, the linear spring is bent and installed into the groove, so that the two ends of the linear spring are respectively arranged at the position of the second plane 14 of the positioning boss 7, and then the two ends of the linear spring are fixedly connected by welding to form a helical coil spring.

[0079] Example 2

[0080] This embodiment provides a specific implementation of a welding tool for a canted coil spring, such as Figure 1 , Figure 2 As shown, it comprises: a fixing seat 1, and a positioning boss 7 is arranged on the surface of the fixing seat 1.

[0081] like Figure 3 As shown, the side surface of the positioning boss 7 includes: a first arc surface 19 , a second plane 14 , and a second arc surface 20 and a third arc surface 21 connecting the first arc surface 19 and the second plane 14 .

[0082] like Figure 2 As shown, a groove is formed on the fixed seat 1 around the positioning boss 7, and the groove includes a groove section formed by the positioning boss 7 and a movable slider, and the movable slider includes: a first slider 8, the first slider 8 can be slidably arranged on the fixed seat 1 in the direction of the second plane 14 of the positioning boss 7, the first slider 8 has a first plane 13 at one end facing the second plane 14 of the positioning boss 7, and the first slider 8 and the positioning boss 7 form the groove section.

[0083] When in use, the linear spring is bent and installed in the groove, so that the two ends of the linear spring are respectively inclined toward the first plane 13 of the first slider 8, and the first slider 8 is driven to move toward the positioning boss 7. Under the pressure of the first plane 13, the two ends of the linear spring are relatively close to the second plane 14 of the positioning boss 7, so that the two ends of the linear spring are horizontally opposite to each other, and then the two ends of the linear spring are fixedly connected by welding to form a helical coil spring.

[0084] Example 3

[0085] This embodiment provides a specific implementation of a welding tool for a canted coil spring, such as Figure 1 , Figure 2 As shown, it comprises: a fixing seat 1, and a positioning boss 7 is arranged on the surface of the fixing seat 1.

[0086] like Figure 3 As shown, the side surface of the positioning boss 7 includes: a first arc surface 19 , a second plane 14 , and a second arc surface 20 and a third arc surface 21 connecting the first arc surface 19 and the second plane 14 .

[0087] like Figure 2As shown, a groove is formed on the fixed seat 1 around the positioning boss 7, and the groove includes a groove section formed by the positioning boss 7 and a movable slider, wherein the movable slider includes: a first slider 8, the first slider 8 can be slidably arranged on the fixed seat 1 in the direction of the second plane 14 of the positioning boss 7; the first slider 8 has a first plane 13 at one end facing the second plane 14 of the positioning boss 7, the first slider 8 has a second abutting surface 16 facing the second arc surface 20 of the positioning boss 7, the first slider 8 has a third abutting surface 17 facing the third arc surface 21 of the positioning boss 7, and the first slider 8 and the positioning boss 7 form the groove section.

[0088] The method of use of this embodiment is the same as that of embodiment 2.

[0089] Example 4

[0090] This embodiment provides a specific implementation of a welding tool for a canted coil spring, such as Figure 1 , Figure 2 As shown, it comprises: a fixing seat 1, and a positioning boss 7 is arranged on the surface of the fixing seat 1.

[0091] like Figure 3 As shown, the side surface of the positioning boss 7 includes: a first arc surface 19 , a second plane 14 , and a second arc surface 20 and a third arc surface 21 connecting the first arc surface 19 and the second plane 14 .

[0092] like Figure 2 As shown, a groove is formed around the positioning boss 7 on the fixed seat 1, and the groove includes a groove section formed by the positioning boss 7 and a movable slider, and the movable slider includes: a first slider 8, a third slider 10 and a fourth slider 11. The first slider 8 can be slidably arranged on the fixed seat 1 in the direction of the second plane 14 of the positioning boss 7, and the first slider 8 has a first plane 13 at one end facing the second plane 14 of the positioning boss 7; the third slider 10 is slidably arranged on the fixed seat 1 and is located on the side of the positioning boss 7 adjacent to the first slider 8, and the third slider 10 has a second abutting surface 16 facing the positioning boss 7, and the second abutting surface 16 is a circular arc surface; the fourth slider 11 is slidably arranged on the fixed seat 1 and is located on the other side of the positioning boss 7 adjacent to the first slider 8, and the fourth slider 11 has a third abutting surface 17 facing the positioning boss 7, and the third abutting surface 17 is a circular arc surface. The groove section is formed between the first sliding block 8 , the third sliding block 10 , the fourth sliding block 11 and the positioning boss 7 .

[0093] How to use

[0094] When in use, the linear spring is bent and installed into the groove so that the two ends of the linear spring are respectively upward toward the first slider 8, and then the third slider 10 and the fourth slider 11 are driven to move toward the positioning boss 7. Under the pressure of the second abutting surface 16 and the third abutting surface 17, the two ends of the linear spring are respectively tilted toward the first plane 13 of the first slider 8.

[0095] Then, the first slider 8 is driven to move toward the positioning boss 7. Under the pressure of the first plane 13, the two ends of the linear spring are relatively close to the second plane 14 of the positioning boss 7, so that the two ends of the linear spring are horizontally opposite to each other, and then the two ends of the linear spring are fixedly connected by welding to form a helical coil spring.

[0096] Example 5

[0097] This embodiment provides a specific implementation of a welding tool for a canted coil spring, such as Figure 1 , Figure 2 As shown, it comprises: a fixing seat 1, and a positioning boss 7 is arranged on the surface of the fixing seat 1.

[0098] like Figure 3 As shown, the side surface of the positioning boss 7 includes: a first arc surface 19 , a second plane 14 , and a second arc surface 20 and a third arc surface 21 connecting the first arc surface 19 and the second plane 14 .

[0099] like Figure 2 As shown, a groove is formed around the positioning boss 7 on the fixing seat 1, and the groove includes a groove section formed by the positioning boss 7 and a movable slider, and the movable slider includes: a first slider 8 and a second slider 9; wherein the first slider 8 can be slidably arranged on the fixing seat 1 in the direction of the second plane 14 of the positioning boss 7, and the second slider 9 can be slidably arranged on the fixing seat 1 in the direction of the first arc surface 19 of the positioning boss 7; the first slider 8 has a first plane 13 at one end facing the second plane 14 of the positioning boss 7, the first slider 8 has a second abutting surface 16 facing the second arc surface 20 of the positioning boss 7, and the first slider 8 has a third abutting surface 17 facing the third arc surface 21 of the positioning boss 7; the second slider 9 has a first abutting surface 15 at one end facing the first arc surface 19 of the positioning boss 7, and the first abutting surface 15 is an arc surface, and horizontal placement surfaces 18 are respectively provided on both sides of the first abutting surface 15. The first slider 8 and the second slider 9 form the groove section with the positioning boss 7.

[0100] How to use

[0101] When in use, the linear spring is placed horizontally on the second slider 9 , and then the second slider 9 is driven to move toward the positioning boss 7 . Under the pressure of the first abutting surface 15 , both ends of the linear spring are respectively upward toward the first slider 8 .

[0102] Then, the two ends of the linear spring are manually moved relative to each other so that the two ends of the linear spring are inclined toward the first plane 13 of the first sliding block 8 .

[0103] Then, the first slider 8 is driven to move toward the positioning boss 7. Under the pressure of the first plane 13, the two ends of the linear spring are relatively close to the second plane 14 of the positioning boss 7, so that the two ends of the linear spring are horizontally opposite to each other, and then the two ends of the linear spring are fixedly connected by welding to form a helical coil spring.

[0104] Example 6

[0105] This embodiment provides a specific implementation of a welding tool for a canted coil spring, such as Figure 1 , Figure 2 As shown, it comprises: a fixing seat 1, and a positioning boss 7 is arranged on the surface of the fixing seat 1.

[0106] like Figure 3 As shown, the side surface of the positioning boss 7 includes: a first arc surface 19 , a second plane 14 , and a second arc surface 20 and a third arc surface 21 connecting the first arc surface 19 and the second plane 14 .

[0107] like Figure 2As shown, a groove is formed on the fixed seat 1 around the positioning boss 7, and the groove includes a groove section formed by the positioning boss 7 and a movable slider, and the movable slider includes: a first slider 8, a second slider 9, a third slider 10 and a fourth slider 11. The first slider 8 can be slidably arranged on the fixed seat 1 in the direction of the second plane 14 of the positioning boss 7, and the first slider 8 has a first plane 13 at one end facing the second plane 14 of the positioning boss 7; the second slider 9 can be slidably arranged on the fixed seat 1 in the direction of the first arc surface 19 of the positioning boss 7, and the second slider 9 has a first abutting surface 15 at one end facing the first arc surface 19 of the positioning boss 7, and the first abutting surface 15 is an arc surface, and on both sides of the first abutting surface 15 , respectively having a horizontal placement surface 18; the third slider 10 is slidably arranged on the fixing seat 1 and is located on the side of the positioning boss 7 adjacent to the first slider 8, and the third slider 10 has a second abutting surface 16 facing the positioning boss 7, and the second abutting surface 16 is an arc surface; the fourth slider 11 is slidably arranged on the fixing seat 1 and is located on the other side of the positioning boss 7 adjacent to the first slider 8, and the fourth slider 11 has a third abutting surface 17 facing the positioning boss 7, and the third abutting surface 17 is an arc surface. The groove section is formed between the first slider 8, the third slider 10 and the fourth slider 11 and the positioning boss 7.

[0108] How to use

[0109] When in use, the linear spring is placed horizontally on the second slider 9 , and then the second slider 9 is driven to move toward the positioning boss 7 . Under the pressure of the first abutting surface 15 , both ends of the linear spring are respectively upward toward the first slider 8 .

[0110] Then, the third slider 10 and the fourth slider 11 are driven to move toward the positioning boss 7 , and under the pressure of the second abutting surface 16 and the third abutting surface 17 , the two ends of the linear spring are respectively inclined toward the first plane 13 of the first slider 8 .

[0111] Then, the first slider 8 is driven to move toward the positioning boss 7. Under the pressure of the first plane 13, the two ends of the linear spring are relatively close to the second plane 14 of the positioning boss 7, so that the two ends of the linear spring are horizontally opposite to each other, and then the two ends of the linear spring are fixedly connected by welding to form a helical coil spring.

[0112] Example 7

[0113] This embodiment provides a specific implementation of a welding tool for a canted coil spring, such as Figure 1As shown, it includes: a fixed seat 1, and a first slider 8, a second slider 9, a third slider 10 and a fourth slider 11 slidably arranged in the fixed seat 1. It also includes: a cover plate 2 covered on the upper surface of the fixed seat 1, and a pressing plate 3 used to be pressed on the upper surface of the positioning boss 7 of the fixed seat 1, the pressing plate 3 is suitable for being embedded in the clamping groove 6 of the cover plate 2, and the middle of the cover plate 2 has an avoidance frame 5, the clamping groove 6 is located on both sides of the avoidance frame 5, and the avoidance frame 5 is used to expose the positioning boss 7 of the fixed seat 1. In addition, as an alternative embodiment, the cover plate 2 can be omitted.

[0114] like Figure 1 As shown, the pressure plate 3 is provided with a relief groove 4, and the relief groove 4 is used to expose the second plane 14 area of ​​the positioning boss 7 after the pressure plate 3 is pressed on the positioning boss 7, so as to facilitate welding operations on both ends of the linear spring.

[0115] like Figure 2 As shown, the fixing seat 1 has a raised positioning boss 7 in the middle, and the periphery of the positioning boss 7 is surrounded by four sliders to form a groove, and the groove has a straight section 12, and the straight section 12 is formed by a first plane 13 of the first slider 8 and a second plane 14 of the positioning boss 7. The first slider 8 is slidably arranged on the fixing seat 1 in the direction of the positioning boss 7, and the end of the first slider 8 facing the positioning boss 7 has a first plane 13, and the outer side wall of the positioning boss 7 has a second plane 14 facing the first plane 13.

[0116] like Figure 3 As shown, the second slider 9 can be slidably arranged on the fixing seat 1 in the direction of the positioning boss 7, the second slider 9 is located on the side of the positioning boss 7 away from the first slider 8, and the end of the second slider 9 facing the positioning boss 7 has a first abutment surface 15; the third slider 10 is slidably arranged on the fixing seat 1 and is located on the side of the positioning boss 7 adjacent to the second slider 9, and the third slider 10 has a second abutment surface 16 facing the positioning boss 7; the fourth slider 11 is slidably arranged on the fixing seat 1 and is located on the other side of the positioning boss 7 adjacent to the second slider 9, and the fourth slider 11 has a third abutment surface 17 facing the positioning boss 7.

[0117] like Figure 3 As shown, a side wall of the positioning boss 7 facing the second slider 9 has a first arc surface 19, and a first abutting surface 15 of the second slider 9 facing the positioning boss 7 has an arc-shaped groove surface. One end of the second slider 9 facing the positioning boss 7 has horizontal placement surfaces 18 on both sides of the first abutting surface 15.

[0118] like Figure 3 As shown, a side wall of the positioning boss 7 facing the third slider 10 has a second arc surface 20, and a second abutting surface 16 of the third slider 10 facing the positioning boss 7 is an arc-shaped groove surface; a side wall of the positioning boss 7 facing the fourth slider 11 has a third arc surface 21, and a third abutting surface 17 of the fourth slider 11 facing the positioning boss 7 is an arc-shaped groove surface. The second arc surface 20 and the third arc surface 21 of the positioning boss 7 are respectively located at two ends of the second plane 14.

[0119] like Figure 3 As shown, a vertical third plane 22 is connected between the first arc surface 19 and the second arc surface 20 of the positioning boss 7, and a vertical fourth plane 23 is connected between the first arc surface 19 and the third arc surface 21; the two ends of the arc-shaped groove surface of the second slider 9 have a fifth plane 24 and a sixth plane 25 extending upward respectively and suitable for matching with the third plane 22 and the fourth plane 23. In addition, as an alternative embodiment, the third plane 22 and the fourth plane 23 on the positioning boss 7 can be omitted; correspondingly, the fifth plane 24 and the sixth plane 25 of the second slider 9 can also be omitted.

[0120] like Figure 3 As shown, the first slider 8 , the second slider 9 , the third slider 10 and the fourth slider 11 are all controlled by screws, so that the sliders can move on the fixing seat 1 .

[0121] like Figure 4 As shown, the helical coil spring is formed into a ring shape by bending a straight spring and then welding. Therefore, a welding point 26 is formed on the helical coil spring.

[0122] like Figure 5 As shown, the diameter of the canted coil spring is represented by D, and the width of the canted coil spring is represented by L, and the unit is millimeter.

[0123] like Figure 6 As shown, the radius of the first arc surface 19 of the positioning boss 7 of the fixing seat 1 is represented by R1, and the radii of the second arc surface 20 and the third arc surface 21 of the positioning boss 7 are represented by R2 and R3, respectively, and the values ​​of R2 and R3 are equal. The length of the second plane 14 of the positioning boss 7 is represented by L1, and the lengths of the third plane 22 and the fourth plane 23 of the positioning boss 7 are represented by L2 and L3, respectively, and the values ​​of L2 and L3 are equal.

[0124] During design, the positioning boss 7 needs to satisfy the following relationship:

[0125] R1=(DL) / 2;

[0126] 4L2=(4-2π)R2+(π-2)(DL);

[0127] L1 = DL-2R2;

[0128] R2 is generally designed to be 0.3-0.5mm.

[0129] like Figure 7 As shown, the radius of the arc-shaped groove surface of the first abutting surface 15 of the second slider 9 is represented by R4, and the lengths of the fifth plane 24 and the sixth plane 25 extending vertically upward at both ends of the arc-shaped groove of the second slider 9 are represented by L4 and L5 respectively, and the values ​​of L4 and L5 are equal.

[0130] During design, the first abutting surface 15 of the second sliding block 9 needs to satisfy the following relationship:

[0131] R4=(D+L) / 2;

[0132] L4=L2.

[0133] like Figure 8 As shown, the length of the first plane 13 of the first slider 8 is represented by L6, the radius of the second abutting surface 16 of the third slider 10 is represented by R5, and the transverse length of the second abutting surface 16 is represented by L7; the radius of the third abutting surface 17 of the fourth slider 11 is represented by R6, and the transverse length of the third abutting surface 17 is represented by L8. In addition, the vertical lengths of R5 and R6 are equal, and the values ​​of L7 and L8 are equal.

[0134] During design, the first plane 13 of the first slider 8, the second abutting surface 16 of the third slider 10, and the third abutting surface 17 of the fourth slider 11 need to satisfy the following relationship:

[0135] R5=R6=R2+L;

[0136] L6+L7+L8=D+L;

[0137] L5 and L6 are generally designed to be 1-3mm to ensure the operability of welding.

[0138] Example 8

[0139] This embodiment provides a method for manufacturing a canted coil spring, using the welding tool in Embodiment 7, and comprising the following steps:

[0140] First, a straight spring is provided for making a canted coil spring.

[0141] Then, if Fig. 9 As shown, the linear spring is placed horizontally on the horizontal placement surface 18 of the second slide 9 .

[0142] like Fig.10As described above, the second slider 9 is slid upward, so that the middle part of the linear spring is bent toward the arc groove surface under the action of the positioning boss 7, and under the action of the vertical planes at both ends of the arc groove surface, the two ends of the linear spring remain in a vertical upward state.

[0143] like Fig.11 As shown, the third slider 10 and the fourth slider 11 are driven to move toward the positioning boss 7 at the same time, and through the action of the third slider 10 and the fourth slider 11, the two ends of the linear spring are bent toward the second plane 14 of the positioning boss 7.

[0144] like Fig.12 As shown, the first slider 8 is driven to move toward the positioning boss 7 so that the two ends of the linear spring are parallel to each other.

[0145] like Fig.13 As shown, the pressure cover is pressed onto the upper surface of the positioning boss 7, and is embedded into the clamping groove 6 of the cover plate 2 to form a clamping connection.

[0146] Thus, the fixing work of the spring is completed, so that the linear spring forms a ring around the periphery of the positioning boss 7, and the two ends of the linear spring are located in the straight section 12 area of ​​the groove, which is convenient for welding.

[0147] Finally, the two ends of the linear spring are butt-jointed or overlapped by welding.

[0148] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present disclosure.

Claims

1. A welding tool for a canted coil spring, characterized in that: include: A fixing seat (1) is provided with a positioning boss (7) on its surface, and a groove formed around the positioning boss (7), wherein the side surface of the positioning boss (7) comprises: a first arc surface (19), a second plane (14), and a second arc surface (20) and a third arc surface (21) connecting the first arc surface (19) and the second plane (14) at both ends, and the groove has a straight line segment (12) area outside the second plane (14); The groove comprises a groove section formed by the positioning boss (7) and the movable slider; The movable slider comprises: A first sliding block (8) is slidably disposed on the fixing seat (1) in a direction toward the second plane (14) of the positioning boss (7), the first sliding block (8) having a first plane (13) at one end thereof facing the second plane (14) of the positioning boss (7), and the first sliding block (8) and the positioning boss (7) form the groove section; The movable slider further comprises: A third sliding block (10) is slidably disposed on the fixing seat (1) and is located on a side of the positioning boss (7) adjacent to the first sliding block (8), the third sliding block (10) having a second abutting surface (16) facing the positioning boss (7); a fourth sliding block (11) slidably disposed on the fixing seat (1) and located on the other side of the positioning boss (7) adjacent to the first sliding block (8); the fourth sliding block (11) having a third abutting surface (17) facing the positioning boss (7); The third sliding block (10) and the fourth sliding block (11) form the groove section with the positioning boss (7).

2. A welding tool for a canted coil spring, characterized in that: include: A fixing seat (1) is provided with a positioning boss (7) on its surface, and a groove formed around the positioning boss (7), wherein the side surface of the positioning boss (7) comprises: a first arc surface (19), a second plane (14), and a second arc surface (20) and a third arc surface (21) connecting the first arc surface (19) and the second plane (14) at both ends, and the groove has a straight line segment (12) area outside the second plane (14); The groove comprises a groove section formed by the positioning boss (7) and the movable slider; The movable slider comprises: A first sliding block (8) is slidably disposed on the fixing seat (1) in the direction of the second plane (14) of the positioning boss (7), the first sliding block (8) having a first plane (13) facing the second plane (14) of the positioning boss (7), a second abutting surface (16) facing the second arc surface (20) of the positioning boss (7), and a third abutting surface (17) facing the third arc surface (21) of the positioning boss (7), the first sliding block (8) and the positioning boss (7) forming the groove section; The movable slider further comprises: A second sliding block (9) is slidably arranged on the fixing seat (1) in the direction of the first arc surface (19) of the positioning boss (7); one end of the second sliding block (9) facing the first arc surface (19) of the positioning boss (7) has a first abutting surface (15); and horizontal placement surfaces (18) are respectively provided on both sides of the first abutting surface (15); the second sliding block (9) and the positioning boss (7) form the groove section.

3. The welding tool for canted coil springs according to claim 2, characterized in that: A vertical third plane (22) is connected between the first arc surface (19) and the second arc surface (20) of the positioning boss (7), and a vertical fourth plane (23) is connected between the first arc surface (19) and the third arc surface (21); The two ends of the arc-shaped groove surface of the second sliding block (9) have a fifth plane (24) and a sixth plane (25) respectively extending vertically upward and suitable for cooperating with the third plane (22) and the fourth plane (23).

4. The welding tool for canted coil springs according to any one of claims 1 to 3, characterized in that: Also includes: The pressing plate (3) is suitable for being pressed on the upper surface of the positioning boss (7), and the pressing plate (3) has a avoiding groove (4) in the second plane (14) area of ​​the positioning boss (7).

5. The welding tool for canted coil springs according to claim 4, characterized in that: Also includes: The cover plate (2) is arranged on the upper surface of the fixing seat (1) and has a avoidance frame (5) exposing the positioning boss (7). Both sides of the avoidance frame (5) respectively have clamping grooves (6) suitable for embedding the pressing plate (3).

6. A method for manufacturing a canted coil spring, characterized in that: The welding tool according to claim 1 or 2 comprises the following steps: A linear spring is placed in a groove formed around a positioning boss (7) of a welding fixture, and both ends of the linear spring are located in the straight section (12) area of ​​the groove; The two ends of the linear spring are butt-jointed or overlapped by welding.

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