WO2022052382A1

WO2022052382A1 - Welding tool used for canted coil spring, and manufacturing method for canted coil spring

Info

Publication number: WO2022052382A1
Application number: PCT/CN2020/141954
Authority: WO
Inventors: 余伟; 文雄伟; 夏泓玮
Original assignee: 北京品驰医疗设备有限公司; 清华大学
Priority date: 2020-09-09
Filing date: 2020-12-31
Publication date: 2022-03-17
Also published as: CN112091509A

Abstract

A welding tool used for a canted coil spring, comprising a fixed base (1), a positioning boss (7) provided on the surface of the fixed base, and a groove formed around the positioning boss (7). The side surface of the positioning boss (7) comprises a first circular arc surface (19), a second plane (14), and a second circular arc surface (20) and a third circular arc surface (21) that are connected to the two ends of the first circular arc surface (19) and the second plane (14); and the groove has the region of a straight line segment (12) outside the second plane (14). The present application further relates to a method for manufacturing a canted coil spring by using the welding tool. The welding tool can fix a linear spring by means of the cooperation of the groove and the positioning boss, and can make the welding regions at the two ends of the linear spring be in the same linear state, and it is more convenient for the butt or lap welding of the linear spring, thereby improving the product quality of the canted coil spring.

Description

Welding tool for canted coil spring and manufacturing method of canted coil spring

technical field

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

Background technique

Due to its unique structure, the canted coil spring is used as a key component of electrical contacts in the field of implantable medical devices, so the manufacturing process of the canted coil spring is very high. The production process of the canted coil spring is generally to first wind the canted coil spring into a straight length, and then bend and weld it into a ring shape, but the bending process easily leads to deformation of the spring, and the welding process requires fine operation, no special tooling, and welding quality. not tall.

SUMMARY OF THE INVENTION

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

In order to solve the above technical problems, the present disclosure provides a welding tool for a canted coil spring, comprising: a fixing seat, a positioning boss on the surface, and a groove formed around the positioning boss, and the side of the positioning boss is The surface includes: a first circular arc surface, a second plane, and a second circular arc surface and a third circular arc surface connecting both ends of the first circular arc surface and the second plane, and the groove has an outer side of the second plane. Line segment area.

As a preferred solution, the groove includes a groove segment formed by the positioning boss and the movable slider.

As a preferred solution, the movable slider includes:

A first sliding block is slidably disposed on the fixing seat toward the direction of the second plane of the positioning boss, and the first sliding block faces one end of the second plane of the positioning boss Having a first plane, the first sliding block and the positioning boss form the groove segment.

As a preferred solution, the movable slider includes:

A first sliding block is slidably disposed on the fixing seat in the direction of the second plane of the positioning boss, and the first sliding block has a sliding block facing the second plane of the positioning boss. The first plane faces the second contact surface of the second arc surface of the positioning boss, and faces the third contact surface of the third arc surface of the positioning boss. The sliding block and the positioning boss form the groove segment.

As a preferred solution, the movable slider further includes:

A third sliding block is slidably arranged on the fixing seat and is located on the side of the positioning boss adjacent to the first sliding block, and the third sliding block has a first sliding block facing the positioning boss. two abutting surfaces;

A fourth sliding block is slidably arranged on the fixing seat and is located on the other side of the positioning boss adjacent to the first sliding block, and the fourth sliding block has a sliding block facing the positioning boss. third contact surface,

The third sliding block and the fourth sliding block and the positioning boss form the groove segment.

As a preferred solution, the movable slider further includes:

A second sliding block is slidably disposed on the fixing seat in the direction of the first arc surface of the positioning boss, and the first sliding block of the second sliding block is facing the positioning boss. One end of the circular arc surface has a first abutting surface, and two sides of the first abutting surface respectively have a horizontal placement surface, and the second sliding block and the positioning boss form the groove segment.

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 third plane is connected between the first arc surface and the third arc surface. straight fourth plane;

Both ends of the arc-shaped groove surface of the second slider have a fifth plane and a sixth plane extending vertically upward respectively and suitable for matching with the third plane and the fourth plane.

As a preferred solution, it also includes:

The pressing plate is suitable for being pressed on the upper surface of the positioning boss, and the pressing plate has an escape groove at the second plane area of the positioning boss.

As a preferred solution, it also includes: a cover plate, which is covered on the upper surface of the fixing seat, and has an avoidance frame exposing the positioning boss, and two sides of the avoidance frame are respectively provided with suitable for embedding the pressing plate. the card slot.

The present disclosure also provides a manufacturing method of a canted coil spring, using the welding tool for a canted coil spring described in any one of the above solutions, comprising the following steps:

Provide a linear spring for making canted coil springs;

The linear spring is placed in the groove formed around the positioning boss of the welding tool, and the two ends of the linear spring are located in the area of the linear section of the groove;

The two ends of the linear spring are butted or overlapped by welding.

Provide a linear spring for making canted coil springs;

Drive the first sliding block to move toward the positioning boss, so that the two ends of the linear spring are parallel to each other;

The two ends of the linear spring are butted or overlapped by welding.

Place a linear spring on the horizontal surface of the second slider;

Slide the second slider upwards, so that the middle part of the linear spring is bent towards 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 straight line Both ends of the spring remain vertically upward;

Drive the third sliding block and the fourth sliding block to move toward the positioning boss at the same time, through the action of the third sliding block and the fourth sliding block, the two ends of the linear spring are bent toward the second plane direction of the positioning boss;

Drive the first sliding block to move toward the direction of the positioning boss, so that the two ends of the linear spring are parallel to each other;

Make the linear spring form a ring around the periphery of the positioning boss, and the two ends of the linear spring are located in the linear segment area of the groove;

The two ends of the linear spring are butted or overlapped by welding.

Place a linear spring on the horizontal surface of the second slider;

Set the cover plate on the upper surface of the fixed seat;

Pressing the pressing plate on the upper surface of the positioning boss, and inserting the pressing plate into the clamping groove of the cover plate to form a clamping connection;

The two ends of the linear spring are butted or overlapped by welding.

The technical solution of the present disclosure has the following advantages:

1. The welding tooling for canted coil springs provided by the present disclosure is used to weld linear springs into annular springs. The springs can be directly bent and then loaded into the grooves. By fixing, the welding areas of both ends of the linear spring can be in the same straight line state, and it is more convenient when the linear spring is welded or overlapped, thereby improving the product quality of the canted coil spring.

2. In the welding tool for canted coil springs provided by the present disclosure, the width of the groove segment of the groove can be adjusted by a movable slider. After the width of the groove segment is widened, the placement of the linear spring can be facilitated, and the The movable slider uses mechanical means to fix the linear spring, which can avoid manual uncertainty and ensure that the linear spring is not damaged.

3. The welding tool for the canted coil spring provided by the present disclosure adopts the relative sliding of a plurality of sliders towards the positioning boss to form the groove. When bending the linear spring, manual bending is not required, which can avoid the need for manual bending. The problem of uneven bending of linear springs.

4. The welding tool for the canted coil spring provided by the present disclosure has a horizontal placement surface on the second slider for horizontal placement of the linear spring, and a concave first abutting surface in the middle of the horizontal placement surface , when the second slider moves towards the positioning boss, the linear spring is pressed down by the positioning boss, the middle part of the linear spring enters the first contact surface, and the two sides are bent upward at the same time, thus completing the first step of the linear spring Bending, avoiding manual operation and ensuring the consistency of bending.

5. The welding tool for canted coil springs provided by the present disclosure has a second arc surface and a third arc surface at both ends of the second plane of the positioning boss, and the second arc surface is connected to the first arc surface. There is a vertical third plane between the arc surfaces, and a vertical fourth plane between the third arc surface and the first arc surface; After bending, 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 through the movement of the third slider and the fourth slider, the two ends of the linear spring are positioned along the The second arc surface and the third arc surface of the boss are bent in the second step, so that both ends of the linear spring can be abutted on the second plane of the positioning boss, so as to complete the folding of the linear spring. bend.

6. The welding tool for the canted coil spring provided by the present disclosure also has a pressure plate suitable for pressing on the positioning boss, and the bending of the linear spring can be positioned by the pressure plate to avoid the linear spring from popping out.

7. The manufacturing method of the canted coil spring provided by the present disclosure, through the welding tool described in any one of the above solutions, after bending the linear spring, and then welding to form the canted coil spring, in the process of bending the linear spring into a ring shape It can reduce the risk of deformation and ensure the quality; 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. form of welding.

Description of drawings

In order to illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

FIG. 1 is an exploded view of a three-dimensional structure of an embodiment of the disclosed welding tool.

FIG. 2 is an enlarged view of the area A in FIG. 1 .

FIG. 3 is a schematic diagram of the three-dimensional structure of each slider in the welding tooling at the initial position.

FIG. 4 is a schematic three-dimensional structure diagram of a canted coil spring.

Fig. 5 is a front view of the canted coil spring.

Fig. 6 is a front view of the positioning boss.

FIG. 7 is a schematic front view of one end of the second sliding block facing the positioning boss.

FIG. 8 is a schematic front view of one end of the first sliding block, the third sliding block and the fourth sliding block facing the positioning boss.

Fig. 9 is a front view of the inserted linear spring.

FIG. 10 is a front view after moving the second slider.

FIG. 11 is a front view after moving the third slider and the fourth slider.

FIG. 12 is a front view after moving the first slider.

FIG. 13 is a schematic three-dimensional structure diagram of the cover plate.

Description of reference numbers:

1. Fixed seat; 2. Cover plate; 3. Pressure plate; 4. Avoidance slot; 5. Avoidance frame; block; 10, the third slider; 11, the fourth slider; 12, the straight line segment; 13, the first plane; 14, the second plane; 15, the first abutting surface; 16, the second abutting surface; 17 , the third abutting surface; 18, the horizontal placement surface; 19, the first arc surface; 20, the second arc surface; 21, the third arc surface; 22, the third plane; 23, the fourth plane; 24 , fifth plane; 25, sixth plane; 26, solder joints.

detailed description

The technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the present disclosure. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present disclosure, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood in specific situations.

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.

Example 1

This embodiment provides a specific implementation of a welding tool for a canted coil spring, as shown in FIG. 1 and FIG. 2 , including: a fixing base 1 , and a positioning boss 7 is provided on the surface of the fixing base 1 .

As shown in FIG. 3 , the side surface of the positioning boss 7 includes: a first arc surface 19 , a second plane 14 , and a second arc surface 20 connecting both ends of the first arc surface 19 and the second plane 14 and the third arc surface 21.

As shown in FIG. 2 , a groove is formed on the fixing base 1 around the positioning boss 7 , and the groove has a linear segment 12 area outside the second plane 14 .

When in use, bend the linear spring and put it into the groove, so that the two ends of the linear spring are respectively set 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, thereby Manufactured to form a canted coil spring.

Example 2

This embodiment provides a specific implementation of a welding tool for a canted coil spring, as shown in Figures 1 and 2, comprising: a fixing seat 1, and a positioning boss 7 is provided on the surface of the fixing seat 1.

As shown in FIG. 2 , a groove is formed on the fixing base 1 around the positioning boss 7 , and the groove includes a groove segment formed by the positioning boss 7 and a movable slider. The moving sliding block includes: a first sliding block 8 , the first sliding block 8 is slidably arranged on the fixing seat 1 toward the direction of the second plane 14 of the positioning boss 7 , and the first sliding block 8 One end of the second plane 14 facing the positioning boss 7 has a first plane 13, and the first sliding block 8 and the positioning boss 7 form the groove segment.

When in use, bend the linear spring and put it into 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 contact 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, and then the two ends of the linear spring are fixed by welding. connected to form a canted coil spring.

Example 3

As shown in FIG. 2 , a groove is formed on the fixing base 1 around the positioning boss 7 , and the groove includes a groove segment formed by the positioning boss 7 and the movable slider, wherein the The movable sliding block includes: a first sliding block 8, the first sliding block 8 is slidably disposed on the fixed seat 1 toward the direction of the second plane 14 of the positioning boss 7; the first sliding block 8 One end of the slider 8 facing the second plane 14 of the positioning boss 7 has a first plane 13 , and the first slider 8 has a second contact surface facing the second arc surface 20 of the positioning boss 7 16. The first sliding block 8 has a third contact surface 17 facing the third arc surface 21 of the positioning boss 7 , and the first sliding block 8 and the positioning boss 7 form the groove part.

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

Example 4

As shown in FIG. 2 , a groove is formed on the fixing base 1 around the positioning boss 7 , and the groove includes a groove segment formed by the positioning boss 7 and a movable slider. The moving slider includes: a first slider 8 , a third slider 10 and a fourth slider 11 . Wherein, the 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 , and the first sliding block 8 faces the position of the positioning boss 7 . One end of the second plane 14 has a first plane 13 ; the third sliding block 10 is slidably arranged on the fixing seat 1 and is located at a position of the positioning boss 7 adjacent to the first sliding block 8 . The third sliding block 10 has a second contact surface 16 facing the positioning boss 7, and the second contact surface 16 is an arc surface; the fourth sliding block 11 is slidably arranged on the On the fixing base 1 and located on the other side of the positioning boss 7 adjacent to the first sliding block 8 , the fourth sliding block 11 has a third abutting surface facing the positioning boss 7 17. The third contact surface 17 is a circular arc surface. The groove section is formed between the first sliding block 8 , the third sliding block 10 and the fourth sliding block 11 and the positioning boss 7 .

Instructions

When in use, bend the linear spring and put it into the groove, so that both ends of the linear spring face upwards towards the first slider 8, and then drive the third slider 10 and the fourth slider 11 towards the positioning protrusion. When the stage 7 moves, the linear spring is in pressure contact with the second abutting surface 16 and the third abutting surface 17 , and both ends of the linear spring are inclined toward the first plane 13 of the first slider 8 respectively.

Then, the first slider 8 is driven to move toward the positioning boss 7, and the linear spring is pressed against the first plane 13, and the two ends of the linear spring are relatively close to the second plane 14 of the positioning boss 7, so that the linear spring The two ends of the linear spring are horizontally opposite, and then the two ends of the linear spring are fixedly connected by welding, so as to form a canted coil spring.

Example 5

As shown in FIG. 2 , a groove is formed on the fixing base 1 around the positioning boss 7 , and the groove includes a groove segment formed by the positioning boss 7 and a movable slider. The moving slider includes: a first slider 8 and a second slider 9; wherein, the first slider 8 is slidably arranged on the fixed seat 1 toward the direction of the second plane 14 of the positioning boss 7 The second sliding block 9 is slidably disposed on the fixing seat 1 toward the direction of the first arc surface 19 of the positioning boss 7; the first sliding block 8 is facing the positioning One end of the second plane 14 of the boss 7 has a first plane 13 , the first sliding block 8 has a second abutting surface 16 facing the second arc surface 20 of the positioning boss 7 , the first sliding block 8 has a second abutting surface 16 . The block 8 has a third contact surface 17 facing the third arc surface 21 of the positioning boss 7 ; the end of the second slider 9 facing the first arc surface 19 of the positioning boss 7 It has a first abutting surface 15 , the first abutting surface 15 is a circular arc surface, and on both sides of the first abutting surface 15 , there are horizontal placement surfaces 18 respectively. The first sliding block 8 and the second sliding block 9 and the positioning boss 7 form the groove segment.

Instructions

When in use, the linear spring is placed horizontally on the second sliding block 9, and then the second sliding block 9 is driven to move toward the positioning boss 7. Both ends face upward toward the first sliding block 8 respectively.

Then, the two ends of the linear spring are relatively toggled manually, so that the two ends of the linear spring are inclined toward the first plane 13 of the first sliding block 8.

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

Example 6

As shown in FIG. 2 , a groove is formed on the fixing base 1 around the positioning boss 7 , and the groove includes a groove segment formed by the positioning boss 7 and a movable slider. The moving slider includes: a first slider 8 , a second slider 9 , a third slider 10 and a fourth slider 11 . Wherein, the 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 , and the first sliding block 8 faces the position of the positioning boss 7 . One end of the second plane 14 has a first plane 13 ; the second sliding block 9 is slidably disposed on the fixing seat 1 in the direction of the first arc surface 19 of the positioning boss 7 , so One end of the second sliding block 9 facing the first arc surface 19 of the positioning boss 7 has a first contact surface 15, and the first contact surface 15 is an arc surface. Both sides of an abutting surface 15 have horizontal placement surfaces 18 respectively; the third sliding block 10 is slidably arranged on the fixing seat 1 and is located between the positioning boss 7 and the first sliding block 8 On the adjacent side, the third sliding block 10 has a second contact surface 16 facing the positioning boss 7 , and the second contact surface 16 is an arc surface; the fourth sliding block 11 slides Set on the fixing base 1 and located on the other side of the positioning boss 7 adjacent to the first sliding block 8 , the fourth sliding block 11 has a third sliding block 11 facing the positioning boss 7 . Three contact surfaces 17, the third contact surface 17 is an arc surface. The groove section is formed between the first sliding block 8 , the third sliding block 10 and the fourth sliding block 11 and the positioning boss 7 .

Instructions

Then, the third sliding block 10 and the fourth sliding block 11 are driven to move toward the positioning boss 7, and the linear spring is in pressure contact with the second contact surface 16 and the third contact surface 17, and the two ends of the linear spring The respective first planes 13 are inclined towards the first sliding block 8 .

Example 7

This embodiment provides a specific implementation of a welding tool for a canted coil spring. As shown in FIG. 1 , it includes: a fixing base 1 , and a first sliding block 8 and a second sliding block slidably arranged in the fixing base 1 9. The third sliding block 10 and the fourth sliding block 11 . It also includes: a cover plate 2 covering the upper surface of the fixing base 1, and a pressing plate 3 for pressing on the upper surface of the positioning boss 7 of the fixing base 1, and the pressing plate 3 is suitable for being embedded in the In the snap groove 6 of the cover plate 2 , there is an avoidance frame 5 in the middle of the cover plate 2 , and the snap groove 6 is located on both sides of the avoidance frame 5 , and the avoidance frame 5 is used to expose the fixing seat 1 The positioning boss 7. In addition, as an alternative embodiment, the cover plate 2 can be omitted.

As shown in FIG. 1 , the pressure plate 3 is provided with an escape groove 4 , and the escape 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 . , in order to facilitate the welding of both ends of the linear spring.

As shown in FIG. 2 , there is a convex positioning boss 7 in the middle of the fixing base 1 , and the periphery of the positioning boss 7 is surrounded by four sliders to form a groove, and the groove has a straight segment 12 . The straight section 12 is formed by the first plane 13 of the first sliding block 8 and the second plane 14 of the positioning boss 7 . The first sliding block 8 is slidably disposed on the fixing base 1 toward the positioning boss 7 , and one end of the first sliding block 8 facing the positioning boss 7 has a first flat surface 13 . The outer side wall of the positioning boss 7 has a second plane 14 facing the first plane 13 .

As shown in FIG. 3 , the second sliding block 9 is slidably disposed on the fixing base 1 in the direction of the positioning boss 7 , and the second sliding block 9 is located at the position of the positioning boss 7 . On the side away from the first sliding block 8, the end of the second sliding block 9 facing the positioning boss 7 has a first contact surface 15; the third sliding block 10 is slidably arranged on the fixed on the seat 1 and located on the side of the positioning boss 7 adjacent to the second sliding block 9 , the third sliding block 10 has a second abutting surface 16 facing the positioning boss 7 ; The fourth sliding block 11 is slidably arranged on the fixing base 1 and is located on the other side of the positioning boss 7 adjacent to the second sliding block 9 . The third contact surface 17 of the positioning boss 7 .

As shown in FIG. 3 , a side wall of the positioning boss 7 facing the second sliding block 9 has a first arc surface 19 , and the second sliding block 9 facing the positioning boss 7 has a first arc surface 19 . An abutting surface 15 has an arc-shaped groove surface. One end of the second sliding block 9 facing the positioning boss 7 has horizontal placement surfaces 18 on both sides of the first abutting surface 15 .

As shown in FIG. 3 , a side wall of the positioning boss 7 facing the third slider 10 has a second arc surface 20 , and the third slider 10 facing the positioning boss 7 has a second arc surface 20 . The second contact surface 16 is an arc-shaped groove surface; a side wall of the positioning boss 7 facing the fourth sliding block 11 has a third arc surface 21, and the fourth sliding block 11 facing the The third contact surface 17 of 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 located at two ends of the second plane 14 respectively.

As shown in FIG. 3 , 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 the first arc surface 19 and the third arc surface 22 are connected to each other. A vertical fourth plane 23 is connected between the arc surfaces 21; both ends of the arc-shaped groove surface of the second slider 9 have upwardly extending surfaces suitable for connecting with the third plane 22 and the fourth plane respectively. 23 to match the fifth plane 24 and the sixth plane 25. 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.

As shown in FIG. 3 , the first sliding block 8 , the second sliding block 9 , the third sliding block 10 and the fourth sliding block 11 are all controlled by screws, so that the sliding blocks can move on the fixed seat 1 .

As shown in FIG. 4 , after the canted coil spring is bent by a linear spring, it is connected into a ring shape by welding. Therefore, a welding point 26 is formed on the canted coil spring.

As shown in Figure 5, the diameter of the canted coil spring is represented by D, and the width of the canted coil spring is represented by L, in millimeters.

As shown in FIG. 6 , the radius of the first arc surface 19 of the positioning boss 7 of the fixed 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 respectively It is represented by R2 and R3, and the values of R2 and R3 are equal. The length of the second plane 14 of the positioning boss 7 is denoted by L1, and the lengths of the third plane 22 and the fourth plane 23 of the positioning boss 7 are denoted by L2 and L3 respectively, and the values of L2 and L3 are equal.

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

R1=(D-L)/2;

4L2=(4-2π)R2+(π-2)(D-L);

L1=D-L-2R2;

R2 is generally designed to be 0.3-0.5mm.

As shown in FIG. 7 , the radius of the arc-shaped groove surface of the first contact surface 15 of the second sliding block 9 is represented by R4, and both ends of the arc-shaped groove of the second sliding block 9 extend vertically upward. The lengths of the fifth plane 24 and the sixth plane 25 are represented by L4 and L5, respectively, and the values of L4 and L5 are equal.

During design, the first contact surface 15 of the second slider 9 needs to satisfy the following relationship:

R4=(D+L)/2;

L4=L2.

As shown in FIG. 8 , the length of the first plane 13 of the first slider 8 is represented by L6, the radius of the second contact surface 16 of the third slider 10 is represented by R5, and the lateral length of the second contact surface 16 is represented by L7 represents; the radius of the third contact surface 17 of the fourth slider 11 is represented by R6, and the lateral length of the third contact surface 17 is represented by L8. Also, the verticals of R5 and R6 are equal, and the values of L7 and L8 are equal.

During design, the first plane 13 of the first slider 8, the second abutment surface 16 of the third slider 10, and the third abutment surface 17 of the fourth slider 11 must satisfy the following relationship:

R5=R6=R2+L;

L6+L7+L8=D+L;

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

Example 8

The present embodiment provides a manufacturing method of a canted coil spring, using the welding tool in Embodiment 7, including the following steps:

First, provide a straight spring for making a canted coil spring.

Then, as shown in FIG. 9 , the linear spring is placed horizontally on the horizontal placement surface 18 of the second slider 9 .

As shown in Fig. 10, slide the second sliding block 9 upward, so that the middle of the linear spring is bent toward the arc-shaped groove surface under the action of the positioning boss 7, and the vertical plane at both ends of the arc-shaped groove surface is bent. Under the action, both ends of the linear spring remain vertically upward.

As shown in FIG. 11 , the third sliding block 10 and the fourth sliding block 11 are driven to move toward the positioning boss 7 at the same time, and through the action of the third sliding block 10 and the fourth sliding block 11 , the two ends of the linear spring are moved toward the positioning protrusion. The table 7 is bent in the direction of the second plane 14 .

As shown in FIG. 12 , the first sliding block 8 is driven to move in the direction of the positioning boss 7 , so that the two ends of the linear spring are parallel to each other.

As shown in FIG. 13 , the press cover is pressed on the upper surface of the positioning boss 7 , and the press cover is inserted into the engaging groove 6 of the cover plate 2 to form a snap connection.

Thus, the fixing 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 area of the linear section 12 of the groove, which is convenient for welding.

Finally, the two ends of the linear spring are butted or overlapped by welding.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. However, the obvious changes or changes derived therefrom still fall within the protection scope of the present disclosure.

Claims

A welding tool for canted coil springs, characterized in that it includes:

The fixing base (1) is provided with a positioning boss (7) on the surface, and a groove formed around the positioning boss (7), and 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 both ends of the first arc surface (19) and the second plane (14). The groove has a straight segment (12) area outside said second plane (14).
The welding tool for canted coil springs according to claim 1, wherein the groove comprises a groove segment formed by the positioning boss (7) and the movable slider.
The welding tool for canted coil springs according to claim 2, wherein the movable slider comprises:

A first sliding block (8) is slidably disposed on the fixing seat (1) toward the direction of the second plane (14) of the positioning boss (7), and the first sliding block (8) ) one end of the second plane (14) facing the positioning boss (7) has a first plane (13), the first slider (8) and the positioning boss (7) form the Grooved segment.
The welding tool for canted coil springs according to claim 2, wherein the movable slider comprises:

A first sliding block (8) is slidably disposed on the fixing seat (1) toward the direction of the second plane (14) of the positioning boss (7), and the first sliding block (8) ) has a first plane (13) facing the second plane (14) of the positioning boss (7), a first plane (13) facing the second arc surface (20) of the positioning boss (7) Two contact surfaces (16), facing the third contact surface (17) of the third arc surface (21) of the positioning boss (7), the first slider (8) and the The positioning bosses (7) form the groove segments.
The welding tool for canted coil springs according to claim 3, wherein the movable slider further comprises:

A third sliding block (10) is slidably arranged on the fixing seat (1) and is located on the side of the positioning boss (7) adjacent to the first sliding block (8), the first sliding block (8) The three sliders (10) have a second abutment surface (16) facing the positioning boss (7);

A fourth sliding block (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 sliding block (8), the The fourth sliding block (11) has a third abutting surface (17) facing the positioning boss (7),

The third sliding block (10) and the fourth sliding block (11) and the positioning boss (7) form the groove segment.
The welding tool for canted coil springs according to claim 4 or 5, wherein the movable slider further comprises:

A second sliding block (9) is slidably disposed on the fixing seat (1) in the direction of the first arc surface (19) of the positioning boss (7), and the second sliding block One end of the first arc surface (19) of (9) facing the positioning boss (7) has a first abutting surface (15) on both sides of the first abutting surface (15). , respectively have a horizontal placement surface (18), and the second sliding block (9) and the positioning boss (7) form the groove segment.
The welding tool for canted coil springs according to claim 6, characterized in that a first arc surface (19) and a second arc surface (20) of the positioning boss (7) are connected with a vertical third plane (22), a vertical fourth plane (23) is connected between the first circular arc surface (19) and the third circular arc surface (21);

Both ends of the arc-shaped groove surface of the second slider (9) have fifth planes ( 24) and the sixth plane (25).
The welding tool for canted coil springs according to any one of claims 1-7, characterized in that, further comprising:

A pressing plate (3), adapted to be pressed on the upper surface of the positioning boss (7), the pressing plate (3) has an escape groove at the area of the second plane (14) of the positioning boss (7) (4).
The welding tool for canted coil springs according to claim 8, further comprising: a cover plate (2), which is covered on the upper surface of the fixing seat (1), and has a positioning protrusion that exposes the positioning protrusion. The avoidance frame (5) of the table (7), the two sides of the avoidance frame (5) are respectively provided with a snap groove (6) suitable for embedding the pressing plate (3).
A manufacturing method of a canted coil spring, characterized in that, the welding tooling according to claim 1 is adopted, comprising the following steps:

A linear spring is placed in the groove formed around the positioning boss (7) of the welding tool, and the two ends of the linear spring are located in the area of the linear segment (12) of the groove;

The two ends of the linear spring are butted or overlapped by welding.