Process for the production of a beaded flat spring

Abstract

The application discloses a preparation process of a diagonal spring with a pin, and relates to the technical field of spring processing. The technical scheme in the application develops an automatic generation process of the diagonal spring with the pin on the basis of a processing device of the diagonal spring. The bending assembly first bends the end of the metal wire to form a first pin, the pushing assembly pushes the metal wire to wind along a winding section, and the pressing assembly pushes the metal wire in a second direction to adjust the distance between the coils on the side away from the spring center, so that the spring body with the diagonal structure is formed. In the preparation process, the first pin of the diagonal spring is only bent with small force, and the second pin is not processed, so that the connection strength of the pins and the spring body is maximally ensured, and the two pins are conveniently welded together in the later period.

Description

Technical Field

[0001] This invention relates to the field of spring processing technology, and in particular to a manufacturing process for a threaded spring with pins. Background Technology

[0002] In implantable cardiac pacemakers, a ring-shaped knurled spring is typically used as the electrical contact to achieve a stable electrical connection between the pulse generator and the electrode leads. The knurled spring, through its radial elastic deformation, fits tightly against the wall of the annular central hole of the electrical connector, thus adapting to the size of the central hole and ensuring installation stability.

[0003] Specifically, the helical spring includes a spring body, a first pin, and a second pin. The spring body is made of wound metal wire, forming a spiral structure that extends in an arc. The two pins are connected to both ends of the spring body for electrical connection with the pacemaker circuit. However, in the prior art, the spring body and the two pins are usually manufactured separately and then welded together. This not only requires additional welding equipment and processes, increasing processing costs and production complexity, but also makes it difficult to guarantee welding quality. Summary of the Invention

[0004] The main objective of this invention is to develop a manufacturing process for a pinned helical spring, which aims to achieve the integral molding of the spring body and the two pins, thereby reducing the tedious welding steps in the later stages.

[0005] To achieve the above objectives, the present invention proposes a manufacturing process for a pinned threaded spring, the manufacturing process of which includes the following steps: S1. The feeding assembly 2 outputs the metal wire from the feeding port 221 along the first direction. When the front end of the metal wire reaches a first length from the feeding port 221, the bending assembly 4 impacts the metal wire at the feeding port 221, and the metal wire at the feeding port 221 is bent to form a first lead 202. S2. While maintaining the output of metal wire from the feed port 221, the pusher 52 pushes the bent metal wire upward at the bend, so that the metal wire abuts against the winding surface 322 of the forming component 3. The metal wire is wound along the winding surface 322 to form a number of connected coils. The pressing component 6 pushes the coils along the second direction to increase the spacing between the coils, thus obtaining a spring body 201 with a diagonal knit structure. S3. Reset the pusher 52 downwards and keep the metal wire output from the feed port 221. When the length of the metal wire between the spring body 201 and the feed port 221 reaches the first length, use the cutting component 7 to cut the metal wire at the feed port 221 to form the second pin 203, thus completing the preparation of the pinned helical spring.

[0006] In one embodiment, in step S1, the first length is the length of the first pin 202, which is 3.4mm to 3.5mm.

[0007] In one embodiment, in step S1, the bending assembly 4 includes a top blade 43 for impacting the metal wire at the feed port 221; the blade head of the top blade 43 is spherical, the diameter of the blade head is 3mm~10mm, and the impact force of the top blade 43 is 2N~3.2N.

[0008] In one embodiment, in step S1, the distance between the point on the surface of the metal wire that is impacted by the top knife 43 and the feed port 221 is 40mm~45mm.

[0009] In one embodiment, the angle between the projection of the top blade 43 onto the horizontal plane and the first direction is 20° to 45°.

[0010] In one embodiment, during step S2, when the metal wire is wound to form the coil, the size and curvature of the coil are controlled by controlling the pusher 52 to reciprocate in the first direction; and during the reciprocating motion of the pusher 52 in the first direction, the metal wire and the pusher 52 also remain in contact.

[0011] In one specific embodiment, during step S2, when the metal wire is wound to form the coil, the pusher 52 performs a reciprocating motion in the first direction once, and the metal wire winds a coil on the surface of the winding section 32 of the forming component 3.

[0012] In one embodiment, in step S2, for each coil wound on the surface of the winding section 32 of the forming component 3, the pressing component 6 pushes the wound coil once along the second direction, thereby increasing the distance between the outer sides of adjacent coils of the spring body 201.

[0013] In one embodiment, when the spring body 201 is not deformed by external force, the outermost distance between adjacent coils is 0.2mm to 1mm.

[0014] In one embodiment, the inner diameter of the coil is 0.5mm to 2.5mm.

[0015] The technical solution of this invention develops an automated production process for a helical spring with pins based on the designed processing device for helical springs. The bending component first bends the end of the metal wire to form the first pin, the pushing component pushes the metal wire to wind along the winding section, and at the same time the pressing component pushes the metal wire in the second direction to adjust the spacing between the coils on the side away from the center of the spring, thereby forming a spring body with a helical structure. In the above preparation process, the first pin of the helical spring is only bent with a small force, while the second pin is not processed, thereby maximizing the connection strength between the pin and the spring body, and also facilitating the subsequent welding of the two pins together. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a helical spring wound into a ring; Figure 2 for Figure 1 A schematic diagram of the unfolded state of the diagonal spring shown. Figure 3 This is a schematic diagram of a structure of an embodiment of the spring forming equipment provided by the present invention; Figure 4 This is a schematic diagram of the structure on the mounting surface in a spring forming equipment. Figure 5 This is a schematic diagram of the drive wheel and wire guide block in a spring forming equipment. Figure 6 for Figure 5 A magnified view of a section at point A in the middle; Figure 7 This is a schematic diagram of the forming components in a spring forming machine; Figure 8 This is a schematic diagram of the bending assembly in a spring forming equipment. Figure 9 This is a structural diagram of some components in a spring forming equipment. Figure 10 for Figure 9 A magnified view of a section at point B in the middle; Figure 11 This is a schematic diagram of the spring forming equipment when bending metal wire. Figure 12 A schematic diagram of the structure of a spring forming equipment after omitting the bending component; Figure 13 for Figure 12 A magnified view of a section at point C; Figure 14 This is a schematic diagram of the spring forming equipment when the winding section and the discharge port are aligned. Figure 15 This is a schematic diagram of the material pressing assembly in another state of a spring forming equipment. Figure 16 This is a schematic diagram of the spring forming equipment during the cutting of metal wire.

[0018] Explanation of icon numbers: 100. Spring forming equipment; 1. Base; 11. Mounting surface; 12. Mounting groove; 2. Material conveying assembly; 21. Feeding module; 211. Turntable; 212. Tensioning wheel; 213. Auxiliary rod; 22. Wire guide block; 221. Discharge port; 222. Drive hole; 223. Limiting protrusion; 2231. Stop surface; 23. Drive wheel; 231. Annular groove; 3. Forming assembly; 31. Abutment section; 32. Winding section; 321. Adjustment surface; 322. Winding surface; 33. Guide surface; 4. Bending assembly; 41. Base; 411. First base; 4111. First connecting block; 4112. Second connecting rod; 4113. Second connecting block; 412. First connecting rod; 413. Second base; 42. Bending drive component; 43. Top knife; 5. Pushing assembly; 51. Slide rail; 52. Push knife; 521. Clearance groove; 53. Lifting drive component; 6. Pressing assembly; 7. Cutting assembly; 71. Second drive component; 72. Fixing block; 73. Cutting knife; 200. Twill spring; 201. Spring body; 202. First pin; 203. Second pin.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] The technical problem solved by this application is that, in implantable cardiac pacemakers, a ring-shaped helical spring is typically used as the electrical contact to achieve a stable electrical connection between the pulse generator and the electrode leads. The helical spring, through its own radial elastic deformation, fits tightly against the wall of the annular central hole of the electrical connector, thereby adapting to the size of the central hole and ensuring installation stability.

[0024] like Figure 1 As shown, the helical spring 200 includes a spring body 201, a first pin 202, and a second pin 203. The spring body 201 is made of wound metal wire, forming a spiral structure and extending in an arc. The two pins are connected to the two ends of the spring body 201, respectively. After the two ends of the spring body 201 are brought close together and wound into a ring, the two pins need to be soldered together for electrical connection with the pacemaker circuit. Simultaneously, the inclination direction of each turn of metal wire forms an angle with the line connecting any point on that turn of wire and the center of the circle, exhibiting the characteristic of a helical pattern.

[0025] However, the relevant technology usually processes the spring body 201 and the two pins separately and then welds them together. This not only requires additional welding equipment and processes, increasing processing costs and production complexity, but also makes it difficult to guarantee welding quality.

[0026] To address the aforementioned problems, this invention proposes a manufacturing process for a pinned threaded spring, the manufacturing process of which includes the following steps: S1. The feeding assembly 2 outputs the metal wire from the feeding port 221 along the first direction. When the front end of the metal wire reaches a first length from the feeding port 221, the bending assembly 4 impacts the metal wire at the feeding port 221, and the metal wire at the feeding port 221 is bent to form a first lead 202. S2. While maintaining the output of metal wire from the feed port 221, the pusher 52 pushes the bent metal wire upward at the bend, so that the metal wire abuts against the winding surface 322 of the forming component 3. The metal wire is wound along the winding surface 322 to form a number of connected coils. The pressing component 6 pushes the coils along the second direction to increase the spacing between the coils, thus obtaining a spring body 201 with a diagonal knit structure. S3. Reset the pusher 52 downwards and keep the metal wire output from the feed port 221. When the length of the metal wire between the spring body 201 and the feed port 221 reaches the first length, use the cutting component 7 to cut the metal wire at the feed port 221 to form the second pin 203, thus completing the preparation of the pinned helical spring.

[0027] Specifically, the threaded spring with leads in this invention is manufactured using spring forming equipment 100; as... Figure 2 As shown, Figure 2 The threaded spring with leads, produced by applying the manufacturing process of this invention to the spring forming equipment 100, can be further manufactured by simple welding to produce, for example, a spring with leads. Figure 1 The finished product shown.

[0028] Furthermore, such as Figure 3 , Figure 9 As shown, the spring forming equipment 100 includes a base 1, a feeding assembly 2, a forming assembly 3, a bending assembly 4, a pushing assembly 5, a pressing assembly 6, and a cutting assembly 7; the feeding assembly 2 is located on the base 1, as shown in the figure. Figure 5As shown, the feeding assembly 2 has a discharge port 221 for outputting metal wire along a first direction at a speed of approximately 3 mm / s; the forming assembly 3 is disposed on the base 1 and located above the discharge port 221. The forming assembly 3 has a winding section 32 and an abutment section 31 connected and arranged side by side along a second direction. The forming assembly 3 can move along the second direction to abut the winding section 32 against the metal wire output from the discharge port 221; the bending assembly 4 is disposed on the base 1 and can move relative to the metal wire output from the discharge port 221 to bend the metal wire to form a first lead 2. 02; The pushing component 5 is located on the base 1 and is positioned directly opposite the outlet 221 along the first direction, abutting against the metal wire to wind the metal wire along the winding section 32; the pressing component 6 is located on the base 1 and is positioned along the first direction on the side of the winding section 32 away from the pushing component 5, for abutting against the metal wire during winding; the cutting component 7 is located on the base 1 and below the outlet 221, and when the abutting section 31 corresponds to the outlet 221, the cutting component 7 can move relative to the abutting section 31 to cut the metal wire, forming the spring body 201 and the second pin 203. The pushing component 5 can reciprocate along the first direction relative to the winding section 32 to adjust the curvature and size of the coil formed by the winding of the metal wire; the pressing component 6 can reciprocate along the second direction relative to the winding section 32, pushing and pressing the coil on the winding section 32 to deform it, increasing the spacing between the coils on the side away from the spring center, thereby forming a spring body with a diagonal knit structure.

[0029] It should also be noted that, referring to Figure 3 In the diagram, the direction a1-a2 is the first direction, the direction b1-b2 is the second direction, and the first direction is perpendicular to the second direction.

[0030] In one embodiment, reference is made to Figure 3 , Figure 5 and Figure 6 The feeding assembly 2 includes a feeding module 21, a wire guide block 22, and two drive wheels 23. The feeding module 21 is located on the base 1 and is used to store and supply metal wire. It includes a turntable 211 and multiple tensioning wheels 212. The turntable 211 is rotatably located on the base 1 and is used to carry the metal wire coil. The multiple tensioning wheels 212 are located between the turntable 211 and the wire guide block 22 and are used to tension the metal wire. A wire guide block 22 is disposed on the base 1 and has a transport channel extending in a first direction. One end of the transport channel is used to receive the metal wire output by the feeding module 21, and the other end forms a discharge port 221. The wire guide block 22 has a drive hole 222 penetrating through the wire guide block 22, and the drive hole 222 communicates with the transport channel. Two drive wheels 23 are rotatably disposed on the base 1 and are respectively located on opposite sides of the wire guide block 22. Parts of the wheel bodies of the two drive wheels 23 extend into the drive hole 222 to clamp the metal wire located in the transport channel, so as to drive the metal wire to move along the transport channel. Further, referring to Figure 5The outer circumferential surface of the drive wheel 23 is provided with an annular groove 231. Two annular grooves 231 are arranged opposite each other to form a clamping channel, and a metal wire is threaded through the clamping channel.

[0031] In one embodiment, reference is made to Figure 3 The feeding assembly 2 also includes an auxiliary rod 213. The first end of the auxiliary rod 213 is rotatably connected to the base 1, and the second end of the auxiliary rod 213 is rotatably connected to at least one tensioning wheel 212. The auxiliary rod 213 can rotate around its first end to drive the tensioning wheel 212 to move and adjust the tension of the wire.

[0032] In one embodiment, reference Figure 6 and Figure 7 The bending assembly 4 includes a base 41, a bending drive 42, and a top cutter 43. The base 41 is movably mounted on the base 1; the bending drive 42 is mounted on the base 41; the top cutter 43 is connected to the output end of the bending drive 42, and under the action of the bending drive 42, the top cutter 43 impacts the metal wire to bend it. The base 41 can rotate relative to the base 1 to adjust the bending angle of the top cutter 43, and the bending drive 42 drives the top cutter 43 to move closer to or away from the metal wire.

[0033] Furthermore, referring to Figure 4 and Figure 8 The base 41 includes a first seat body 411, a first connecting rod 412, and a second seat body 413. The first seat body 411 protrudes from the mounting surface 11. One end of the first connecting rod 412 is connected to the end of the first seat body 411 away from the mounting surface 11. The second seat body 413 is sleeved on the other end of the first connecting rod 412 and can rotate around the axis of the first connecting rod 412. The second seat body 413 is used to mount the bending drive component 42. The second seat body 413 rotates so that the output end of the bending drive component 42 faces the metal wire at the discharge port 221.

[0034] Understandably, at this time, the discharge port 221, the bending drive 42 and the top cutter 43 are located in the same horizontal plane, so that after changing the orientation of the output end of the bending drive 42, the top cutter 43 can face the metal wire directly, so as to facilitate bending.

[0035] Furthermore, the first base 411 includes a first connecting block 4111, a second connecting rod 4112, and a second connecting block 4113. The first connecting block 4111 is disposed on the mounting surface 11; one end of the second connecting rod 4112 is connected to the first connecting block 4111; the second connecting block 4113 is sleeved on the other end of the second connecting rod 4112 and can rotate around the axis of the second connecting rod 4112, and the first connecting rod 412 is connected to the second connecting block 4113. The axis of the second connecting rod 4112 forms an angle with the axis of the first connecting rod 412.

[0036] In one embodiment, reference is made to Figure 10 , Figure 11 and Figure 13 The pushing component 5 includes a pusher 52, which is positioned directly opposite the discharge port 221 along a first direction. When the abutment section 31 corresponds to the discharge port 221, the pusher 52 is located below the abutment section 31. The pusher 52 and the abutment section 31 abut against opposite sides of the metal wire, respectively. A clearance groove 521 is provided on the side of the pusher 52 facing the abutment section 31, and the top blade 43 extends to the clearance groove 521 during the impact on the metal wire. The pushing component 5 includes a slide rail 51, the pusher 52, and a first driving member (not shown). The slide rail 51 is installed at the bottom of the mounting groove 12 and extends along the first direction. The pusher 52 slides along the slide rail 51 via a slider structure, allowing it to reciprocate along the first direction to abut against the metal wire. The first driving member is located within the mounting groove 12 and is connected to the pusher 52 via a transmission connection, thereby driving the pusher 52 to move. The pusher 52 has a relief groove 521 on the side facing the abutment section 31, forming a space for the top cutter 43 to be inserted.

[0037] Furthermore, referring to Figure 4 The pushing component 5 also includes a lifting drive 53, which is located at the output end of the first drive and connected to the pusher 52. The lifting drive 53 is used to drive the pusher 52 to move closer to or away from the metal wire in the vertical direction, so that the metal wire can be clamped when performing the bending process and the metal wire can be pushed to wind when performing the winding process.

[0038] Furthermore, referring to Figure 10 The clearance groove 521 penetrates the pusher 52 along the second direction. Understandably, this design avoids the problem of limited insertion depth of the pusher 43, allowing the pusher 43 to select the corresponding insertion depth according to the position and bending angle requirements of the metal wire.

[0039] In one embodiment, reference is made to Figure 7 The winding section 32 and the abutment section 31 are coplanar on the side facing the pressing assembly 6, forming a guide surface 33. The pressing assembly 6 can move along a second direction along one side of the guide surface 33 to abut against the metal wire wound on the winding section 32. The winding section 32 and the abutment section 31 cooperate to form the actuating end of the forming assembly 3, and are integrally formed. Simultaneously, the side of the winding section 32 facing the pressing assembly 6 and the side of the abutment section 31 facing the pressing assembly 6 are in the same plane, which extends along the second direction, forming a continuous guide surface 33.

[0040] Understandably, the pressing component 6 is attached to the guide surface 33, which provides limiting support for the movement of the pressing component 6, ensuring that the pressing component 6 can move along the second direction, avoiding shaking during the movement, thereby improving the accuracy of the spacing adjustment of each loop of metal wire.

[0041] Furthermore, referring to Figure 7 The projection of the winding section 32 along the second direction lies within the projection of the abutment section 31 along the second direction. At this time, the end face of the abutment section 31 facing the winding section 32 can limit the winding of the metal wire. When the metal wire is wound on the winding section 32, this end face can prevent the metal wire from sliding towards the abutment section 31, confining the winding area of ​​the metal wire within the winding section 32 and avoiding interference.

[0042] In one embodiment, reference is made to Figure 7 , Figure 14 and Figure 15 The winding section 32 includes an adjustment surface 321 and a winding surface 322 arranged opposite to each other along a first direction. The adjustment surface 321 is arranged towards the pressing assembly 6 and forms a guide surface 33 coplanar with the abutting section 31. The winding surface 322 is an arc surface and protrudes towards the side away from the pressing assembly 6 for winding metal wire. The adjustment surface 321 is a planar structure and cooperates with the abutting section 31 to form the guide surface 33. The winding surface 322 is set as an arc surface and protrudes towards the direction away from the pressing assembly 6 to form a mold cavity for winding metal wire.

[0043] Furthermore, when the metal wire is wound around the arc-shaped area of ​​the winding surface 322, the metal wire receives sufficient arc-shaped support to maintain its coiled shape. As feeding continues, when the metal wire wound through the winding surface 322 rotates to the area where the adjusting surface 321 is located, the coil formed by the metal wire is in a suspended state, reducing the frictional resistance during the movement of the metal wire. This allows the pressing assembly 6 to push the metal wire along the second direction with a smaller thrust to cause deformation, thereby forming a diagonal knit structure in the spring body.

[0044] In one specific embodiment, by Figures 13 to 14 The forming component 3 gradually moves until its winding section 32 corresponds to the discharge port 221. Simultaneously, the pushing component 5 is positioned below the winding surface 322 to abut against the metal wire output from the discharge port 221, thereby pushing the metal wire to wind upward along the winding surface 322. More specifically, the cross-section of the winding section 32 is semi-circular. At this time, the tangent at the lower end of the winding surface 322 extends along the first direction, consistent with the conveying direction of the metal wire, so that the metal wire horizontally output from the discharge port 221 can adhere to the lower end of the winding surface 322 without deflection; and the pushing component 5 is positioned below the winding surface 322 and abuts against the metal wire.

[0045] Specifically, by Figures 14 to 15 After the pressing surface of the pressing component 6 moves a certain distance along the guide surface 33 in the area of ​​the winding section 32, it comes into contact with the metal wire. When the winding section 32 corresponds to the discharge port 221, the pressing component 6 always protrudes from the contact section 31 during the reciprocating movement of the pressing component 6. At this time, the contact section 31 can also avoid interfering with the winding of the metal wire.

[0046] In one embodiment, reference is made to Figure 16 The cutting assembly 7 includes a second driving member 71, a fixing block 72, and a cutter 73. The second driving member 71 is disposed in the mounting groove 12. The fixing block 72 is rotatably disposed in the mounting groove 12 at its middle position, and one end of the fixing block 72 is connected to the output end of the second driving member 71. The cutter 73 is connected to the other end of the fixing block 72. The second driving member 71 drives the fixing block 72 to move, thereby causing the cutter 73 to rotate to move closer to or away from the abutment section 31.

[0047] In one embodiment, by Figures 15 to 16 The lower surface of the contact section 31 is a planar structure, which is used to limit and support the metal wire. When the cutter 73 contacts the lower surface of the metal wire and applies pressure, it can cut the metal wire.

[0048] In one embodiment, in step S1, the first length is the length of the first pin 202, which is 3.4mm to 3.5mm.

[0049] In a specific embodiment, in step S1, the top blade 43 is used to impact the metal wire at the feed port 221; the blade head of the top blade 43 is spherical, the diameter of the blade head is 3mm~10mm, and the impact force of the top blade 43 is 2N~3.2N.

[0050] It is understandable that by designing the blade tip of the top cutter 43 as spherical, it is beneficial to prevent the blade tip from causing significant damage to the metal wire during the impact process, thereby ensuring the connection strength between the first pin 202 and the spring body 201.

[0051] In one embodiment, in step S1, the distance between the point on the surface of the metal wire that is impacted by the top knife 43 and the feed port 221 is 40mm~45mm.

[0052] In another embodiment, the angle between the projection of the top blade 43 onto the horizontal plane and the first direction is 20° to 45°.

[0053] It is understood that the angle between the projection of the top cutter 43 on the horizontal plane and the first direction and the angle between the bending drive member 42 and the first direction are consistent; by further defining the impact point and direction of the top cutter 43, it is beneficial to ensure that the first pin 202 and the spring body 201 are within a suitable range, and it is also beneficial to further improve the hit rate of the top cutter 43, which is conducive to the continuous production of springs.

[0054] More specifically, in step S1, the pushing component 5 is initially positioned below the winding surface 322. This position ensures that the pushing component 5 does not interfere with the initial output of the metal wire from the outlet 221. After the metal wire is bent, the winding section 32 moves above the outlet 221. Simultaneously, the driving component 53 drives the pusher 52 to move upward, causing the metal wire to come into contact with the winding surface 322 and giving part of the metal wire an initial curvature. The feeding component 2 continues to feed the metal wire, which begins to climb along the curved surface. The pushing component 5 then moves back and forth in the first direction. By changing the magnitude of the force between the pushing component 5 and the metal wire, the curvature and inner diameter of the coil obtained after winding are adjusted.

[0055] In one embodiment, during step S2, when the metal wire is wound to form the coil, the size and curvature of the coil are controlled by controlling the reciprocating motion of the pusher 52 in the first direction; and during the reciprocating motion of the pusher 52 in the first direction, the metal wire and the pusher 52 also remain in contact.

[0056] In a specific embodiment, during step S2, when the metal wire is wound to form the coil, the pusher 52 performs a reciprocating motion in the first direction once, and the metal wire winds a coil on the surface of the winding section 32 of the forming component 3.

[0057] It is understood that in step S2, the metal wire is in contact with the pusher 52 due to the force generated by the deformation during the winding process, and the magnitude of the force changes periodically with the reciprocating motion of the pusher 52, so that the shape, size and curvature of each coil in the spring body 201 are the same.

[0058] In one embodiment, in step S2, for each coil wound on the surface of the winding section 32 of the forming assembly 3, the pressing assembly 6 pushes the wound coil once along the second direction, increasing the spacing between the outer sides of adjacent coils of the spring body 201. It can be understood that increasing the spacing between the outer sides of adjacent coils of the spring body 201 indicates that the spring forms a structure with diagonal stripes.

[0059] In one specific embodiment, when the spring body 201 is not deformed by external force, the outermost distance between adjacent coils is 0.2mm to 1mm.

[0060] In one specific embodiment, the inner diameter of the coil is 0.5mm to 2.5mm.

[0061] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A manufacturing process for a threaded spring with leads, characterized in that, The manufacturing process of the pinned helical spring includes the following steps: S1. The feeding assembly 2 outputs the metal wire from the feeding port 221 along the first direction. When the front end of the metal wire reaches a first length from the feeding port 221, the bending assembly 4 impacts the metal wire at the feeding port 221, and the metal wire at the feeding port 221 is bent to form a first lead 202. S2. While maintaining the output of metal wire from the feed port 221, the pusher 52 pushes the bent metal wire upward at the bend, so that the metal wire abuts against the winding surface 322 of the forming component 3. The metal wire is wound along the winding surface 322 to form a number of connected coils. The pressing component 6 pushes the coils along the second direction to increase the spacing between the coils, thus obtaining a spring body 201 with a diagonal knit structure. S3. Reset the pusher 52 downwards and keep the metal wire output from the feed port 221. When the length of the metal wire between the spring body 201 and the feed port 221 reaches the first length, use the cutting component 7 to cut the metal wire at the feed port 221 to form the second pin 203, thus completing the preparation of the pinned helical spring.

2. The manufacturing process of the threaded spring with pins as described in claim 1, characterized in that, In step S1, the first length is the length of the first pin 202, which is 3.4mm~3.5mm.

3. The manufacturing process of the threaded spring with pins as described in claim 1, characterized in that, In step S1, the bending assembly 4 includes a top blade 43, which is used to impact the metal wire at the feed port 221. The top cutter 43 has a spherical blade with a diameter of 3mm to 10mm, and the impact force of the top cutter 43 is 2N to 3.2N.

4. The manufacturing process of the pinned threaded spring as described in claim 3, characterized in that, In step S1, the distance between the point on the surface of the metal wire that is impacted by the top knife 43 and the feed port 221 is 40mm~45mm. And / or, the angle between the projection of the top blade 43 onto the horizontal plane and the first direction is 20°~45°.

5. The manufacturing process of the pinned threaded spring as described in claim 1, characterized in that, In step S2, during the process of winding the metal wire to form the coil, the size and curvature of the coil are controlled by controlling the reciprocating motion of the pusher 52 in the first direction; and during the reciprocating motion of the pusher 52 in the first direction, the metal wire and the pusher 52 also remain in contact.

6. The manufacturing process of the pinned threaded spring as described in claim 1, characterized in that, In step S2, during the process of the metal wire being wound to form the coil, the pusher 52 performs a reciprocating motion in the first direction, and the metal wire winds a coil on the surface of the winding section 32 of the forming component 3.

7. The manufacturing process of the pinned threaded spring as described in claim 6, characterized in that, In step S2, for each coil wound on the surface of the winding section 32 of the forming component 3, the pressing component 6 pushes the wound coil once along the second direction, thereby increasing the distance between the outer sides of the adjacent coils of the spring body 201.

8. The manufacturing process of the pinned threaded spring as described in claim 6, characterized in that, In the spring body 201, the outermost spacing between the coils is 0.2mm~1mm; And / or, the inner diameter of the coil is 0.5mm to 2.5mm.

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