Manufacturing process of multi-spiral-line spring and multi-spiral-line spring

Abstract

The invention provides a manufacturing process of a multi-helix spring. The manufacturing process comprises the following steps: cutting a raw material according to size parameters of the spring to form a to-be-processed workpiece; performing rough machining on the workpiece; implementing a cutting process of a plurality of strands of spiral line bodies on the workpiece; the multi-spiral-line spring is formed through the process of machining spiral line winding parts at the two ends of each strand of spiral line body, and the two ends of the formed multi-spiral-line spring are of a closed structure; after forming, performing a heat treatment process and a finish machining process after heat treatment through heat treatment equipment; by the adoption of the machining process, the problem that in the prior art, a multi-spiral-line closed-type spring cannot be machined in a winding forming process is solved, and then the problem that in the prior art, a product replacing a single-spiral-line open-type spring cannot be produced is solved; and transverse deformation is easy to generate, so that the supporting stability is poor.

Description

Technical Field

[0001] The present invention relates to a spring, and particularly to a manufacturing process of a multi-helix spring and the multi-helix spring. Background Art

[0002] Springs are widely used. Combining with Figure 5 and Figure 6 in the accompanying drawings of the specification, most of the existing springs in the current art are single-helix springs, which are mostly formed by hot coiling or cold coiling. Moreover, the support surface of this type of spring cannot achieve 360-degree end face support, but can only achieve 270-degree support because its support plane is irregular. Specifically, it is generally manifested that the end of the support surface is wider while the tail is narrower, which is likely to cause stress concentration at the tail. In addition, there are also problems that the larger the support surface, the thinner the thickness of the spring end and the poorer the strength of the end. Moreover, it is difficult for a single helix to be uniformly stressed and deformed. When the mean diameter of the spring remains unchanged and the height of the spring increases, the non-uniformity of its stress and deformation becomes more obvious, thereby generating lateral deformation. In addition, because it is formed by coiling, there will be errors between the end spiral angles and it is difficult to keep them consistent. Based on the above problems, it can be determined that the technical problems brought by this type of spring are poor support stability caused by non-uniform stress and easy generation of lateral deformation.

[0003] When using the above-mentioned single-helix spring in the shock isolation unit for building shock isolation, since the shock isolation unit is generally used in high-rise buildings more, the vibration force generated during an earthquake will cause lateral deformation after the spring is stressed and compressed. This is likely to cause the high-rise building to shake more obviously, thus being disadvantageous for improving the seismic performance of the building. Therefore, the present invention provides a manufacturing process of a multi-helix spring and the multi-helix spring. Summary of the Invention

[0004] In order to solve the problem of poor support stability of the single-strand helix spring formed by hot coiling in the prior art, the present invention provides a manufacturing process of a multi-helix spring: the manufacturing process includes a process of cutting raw materials according to the size parameters of the spring to form a workpiece to be processed; a process of rough machining the workpiece; a process of cutting several strands of helix bodies on the workpiece; a process of processing helix end coils at both ends of each strand of helix body to form a multi-helix spring. After forming, both ends of the multi-helix spring are of a closed structure; After forming, a heat treatment process is carried out through a heat treatment device and a finishing process after heat treatment.

[0005] Preferably, the raw material is a hollow tubular raw material or a solid rod-shaped raw material.

[0006] Preferably, when machining a number of helical bodies, after each one is machined, the workpiece needs to be rotated by a certain angle to facilitate the milling of the next helical body.

[0007] Preferably, the angle by which the workpiece rotates is evenly distributed based on the circumference according to the number of helical bodies.

[0008] Preferably, when machining the coil closing part of the helical line, one or a combination of wire cutting, electric discharge machining, water jet cutting, laser cutting, micro drill milling cutting, or ion beam cutting is used.

[0009] According to the manufacturing process of the multi - helical spring, the present invention also provides a multi - helical spring produced according to this manufacturing process, which includes a body. Characteristically, it includes support parts with annular planes at both ends. Between the support parts, there are a number of helical bodies. The number of helical bodies and the support parts with annular planes at both ends of the body form a multi - helical spring with closed ends.

[0010] Preferably, the number of helical bodies is evenly distributed on the body.

[0011] Preferably, coil closing parts are provided at both ends of the helical body.

[0012] More preferably, helical grooves are formed between the helical bodies.

[0013] More preferably, the support part is a 360 - degree annular plane support In the present invention, by adopting the above - mentioned processing technology, the problem in the prior art that the processing of multi - helical closed - end springs cannot be achieved in the winding forming process is solved. Furthermore, through this process, the problem in the prior art that a product to replace the single - helical open - end spring cannot be produced to solve the problem of uneven stress and poor support stability caused by easy lateral deformation is solved.

[0014] The coil closing part structure produced by the processing technology of the coil closing part solves the problem that there will be errors between the end spiral angles in the winding process and it is difficult to keep them consistent. Furthermore, the ends of the helical bodies are made uniform. Therefore, when the spring is compressed and deformed under force, the deformation at the sharp corners of the coil closing part is also the same, avoiding the problem of uneven force deformation at the sharp corners of the spring end and resulting lateral displacement.

[0015] By setting the support parts to have regular annular planes at both ends, forming a 360 - degree planar support, the support stability is improved. By setting it as a multi - helical spring with closed ends, the support strength of the spring body is improved, and the support stability is further improved.

[0016] By adopting the evenly distributed structure of multi - helical bodies, the force is more evenly distributed when stressed, further avoiding lateral deformation during compression. Description of the Drawings

[0017] Figure 1 This is a schematic structural view of the spring of the present invention; Figure 2 This is a schematic structural view of another perspective of the spring of the present invention; Figure 3 This is a schematic cross-sectional view of the spring of the present invention; Figure 4 This is a schematic partial cross-sectional view of the spring of the present invention; Figure 5 This is a schematic structural view of a single helical spring in the prior art; Figure 6 This is a schematic structural view of the support surface of a single helical spring in the prior art. Specific embodiments

[0018] Next, in conjunction with the accompanying drawings, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] It should be noted that all the directional indications in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture as shown in the accompanying drawings. If this specific posture changes, the directional indication will also change accordingly.

[0020] In one embodiment, when producing a multi-helical spring, according to the size parameters of the spring, a seamless pipe is selected as the raw material for cutting, and it is cut into workpieces to be processed. Then, according to the size of the required spring, the inner and outer diameters, end faces, and lengths of the workpieces are processed, and other processing techniques are used to complete the rough machining of the workpieces; After the rough machining is completed, the workpieces are loaded into the machining center, and the helical bodies are milled out through the machining center. After the machining of the helical bodies is completed, helical grooves that are internally and externally connected are formed. When machining the helical bodies, according to the evenly distributed quantity, after each strand is processed, the workpiece is rotated clockwise or counterclockwise by a certain angle and then the next strand is processed, and when each strand of the helical body is processed, it shall not form a cut-off opening structure with the support part, so as to form a closed multi-helical spring structure. If the spring has three strands of helical bodies, the workpiece is rotated 120 degrees after each strand is milled. If it has four strands, the workpiece is rotated 90 degrees after each strand is milled. In this way, based on the quantity of the helical bodies, it is evenly rotated around the circumference, which can avoid problems such as machining interference and inaccurate machining accuracy, facilitate the machining of the next strand of the helical body, and improve the production and processing efficiency; After the spiral body is processed, the two ends of each spiral body are processed by wire cutting to form a sharp-angled closing part. During cutting, the workpiece rotates, so as to realize cutting while rotating, and further ensure that the processing angles of the closing parts of the multi-strand spiral bodies are consistent. There are also many processing methods for the closing part, such as any processing method of electric discharge machining, water jet cutting, laser cutting, micro-drilling and milling cutting, or ion beam cutting can be used to complete it. The purpose of keeping the processing angles of the closing parts of the multi-strand spiral bodies consistent is to keep the helix angles of the multi-strand spiral lines consistent, so that when the spring is compressed under force, because the helix angles of the multi-strand spiral lines are all consistent, it can ensure that the force deformation at the sharp-angled closing part of the spring is uniform, and further avoid lateral deformation.

[0021] The closed multi-strand spiral spring processed by the above process is heat-treated by a heat treatment device and then subjected to finishing processes such as deburring by grinding, machining of the inner and outer diameters, and chamfering.

[0022] In another embodiment, if the raw material is a solid rod-shaped raw material, in rough machining, in addition to machining processes such as the outer diameter, end face, and length, a central hole opening process needs to be added. After the solid rod is formed into a hollow tubular workpiece, it enters the subsequent processing processes of the spiral body and the closing part.

[0023] The spring manufactured by the above process includes a body, and is characterized in that it includes support parts with annular planes at both ends of the body. Between the support parts, there are several spiral bodies. The several spiral bodies and the support parts with annular planes at both ends of the body form a two-end closed multi-spiral spring. Through the design of the annular plane structure of the support part, the problem of irregular support planes is solved, the widths of the head and tail of the support surface are kept consistent, the support surface is increased, and the problem of stress concentration is avoided. By designing the structure between the spiral body and the support part as a non-opening structure, an integral closed multi-spiral spring is formed, which improves the strength of the spring body and the performance of avoiding lateral deformation.

[0024] In the present invention, several spiral bodies are evenly distributed on the body, and the purpose of providing closing parts at both ends of the spiral body is to avoid the problem of uneven force on the spring and lateral deformation displacement. The spiral body is preferably more than two strands, and preferably three strands, which can improve the uniformity of force.

[0025] By setting the support part as a 360-degree annular plane support structure, the area of the support surface is increased and the support stability is improved.

Claims

1. A manufacturing process for a multi-helical spring: its characteristics include: According to the size parameters of the spring, the raw material is cut to form the process of the workpiece to be processed; The process of rough machining a workpiece; A cutting process of a plurality of spirals is performed on a workpiece; The process of processing the spiral coiling parts at both ends of each spiral body to form a multi-helical spring. The two ends of the formed multi-helical spring are closed structures, and the processing angles of the spiral coiling parts are consistent; After forming, the heat treatment process and the finishing process after heat treatment are carried out through heat treatment equipment.

2. A manufacturing process for a multi-helical spring according to claim 1: the raw material is a hollow tubular raw material or a solid rod-shaped raw material.

3. A manufacturing process for a multi-helical spring according to claim 1 or 2: when cutting a plurality of helical strands, after each strand is processed, the workpiece needs to be rotated by a certain angle to facilitate the milling of the next helical strand.

4. A manufacturing process for a multi-helical spring according to claim 3: the angle of rotation of the workpiece is based on a uniform rotation of the circumference according to the number of helical bodies.

5. A manufacturing process for a multi-helical spring according to claim 1: the spiral wire winding portion is processed by one or more of a combination of wire cutting, electric spark cutting, water jet cutting, laser cutting, micro drilling and milling cutting, or ion beam cutting.

6. A multi-helical spring manufactured by the manufacturing process of a multi-helical spring according to any one of claims 1 to 5, comprising a body, characterized in that It comprises a support part with annular planes at both ends, a plurality of helical wire bodies are arranged between the support parts, and the plurality of helical wire bodies and the support parts with annular planes at both ends of the main body constitute a closed-end multi-helical spring.

7. The multi-helical spring according to claim 6, characterized in that: A plurality of helical strands are evenly distributed on the main body.

8. The multi-helical spring according to claim 7, characterized in that: Both ends of the spiral body are provided with coiling parts.

9. The multi-helical spring according to claim 8, characterized in that: A spiral groove is formed between the spiral bodies.

10. The multi-helical spring according to claim 1, characterized in that: The support part is a 360-degree annular plane support structure.

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