CN113540839B

CN113540839B - Bending terminal wire and manufacturing method thereof

Info

Publication number: CN113540839B
Application number: CN202110691585.6A
Authority: CN
Inventors: 彭浩; 宋佳文; 杨传涛; 张卫
Original assignee: Zhejiang Chant New Materials Technology Co ltd
Current assignee: Zhejiang Chant New Materials Technology Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2023-09-15
Anticipated expiration: 2041-06-22
Also published as: CN113540839A

Abstract

The invention discloses a bending terminal wire and a manufacturing method thereof, wherein N bending parts which are connected in sequence are decomposed from a large arc to be bent, any one bending part comprises a small arc, the small arc is connected with the adjacent bending part through a straight edge, and N is a natural number.

Description

Bending terminal wire and manufacturing method thereof

Technical Field

The invention relates to the technical field of cables, in particular to a bending terminal wire and a manufacturing method thereof.

Background

The terminal wires can be used for conveniently connecting wires due to the fact that the number and the distance of the wires can be selected randomly, the size of electronic products can be greatly reduced, production cost is reduced, production efficiency is improved, and the terminal wires are widely applied to data transmission between mobile parts and a main board, between PCB boards and in miniaturized electrical equipment.

In order to adapt to the requirements of different component interfaces, the terminal wire is usually required to be bent to achieve different bending angles or radians. At present, the terminal wire is formed by a push block, and the push block forming process is simple and convenient to operate. However, when the terminal wire is bent by the push block molding, particularly when a large arc shape is required to be formed, rebound is likely to occur after molding, and the shape of the final product is not qualified.

Disclosure of Invention

Aiming at part or all of the problems in the prior art, the invention provides a bending terminal line which comprises N bending points which are sequentially connected, wherein the end points of the N bending points form a first arc, and N is a natural number.

Further, any one of the bends comprises two straight sides and a bent angle, and the bent angle is in a circular arc shape.

Further, the straight sides of the N bends have the same length, and the bending angles and radians are the same.

The invention further provides a manufacturing method of the bent terminal wire, which comprises the following steps:

decomposing the arc to be bent into N sections, and determining the bending angle radian and straight edge length of each section;

manufacturing a jig according to the determined bent angle radian and straight edge length; and

and bending the terminal wire according to the jig through a pushing block forming process.

Further, the arc bending to be bent is evenly decomposed into N sections.

Further, the jig is made of an aluminum plate or an bakelite plate.

According to the bending terminal wire and the manufacturing method thereof, the large arc to be bent in the terminal wire is decomposed into a plurality of straight lines and small arcs, so that radian rebound of a formed product is greatly reduced, and the yield is improved. The present invention is based on the following insight of the inventors: at present, one of the reasons for low yield of the terminal wires is that a plurality of terminal wires need to be bent in an arc shape, if a common pushing block forming process is adopted, rebound is very easy to generate after forming, and finally products are not in accordance with requirements, defective products are generated, even if rebound amplitude is in an allowable range, certain difference exists due to unfixed rebound each time, and the consistency of the products is poor. The inventor finds that the rebound amplitude increases along with the increase of the arc bending radian and radius in the bending operation, and based on the finding, the inventor decomposes a large arc to be bent in a terminal wire into a plurality of straight lines and small arcs, so that the rebound is almost negligible because the straight lines do not rebound and the radian and radius of the small arcs are smaller, and therefore, according to the terminal wire formed by the method, the rebound of the radian of a formed product is small and the consistency is improved.

Drawings

To further clarify the above and other advantages and features of embodiments of the present invention, a more particular description of embodiments of the invention will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. In the drawings, for clarity, the same or corresponding parts will be designated by the same or similar reference numerals.

Fig. 1 shows a schematic structural view of a bent terminal wire according to an embodiment of the present invention.

Detailed Description

In the following description, the present invention is described with reference to various embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details, or with other alternative and/or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention. Similarly, for purposes of explanation, specific numbers, materials and configurations are set forth in order to provide a thorough understanding of the embodiments of the invention. However, the invention is not limited to these specific details. Furthermore, it should be understood that the embodiments shown in the drawings are illustrative representations and are not necessarily drawn to scale.

Reference throughout this specification to "one embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

It should be noted that the embodiments of the present invention describe the process steps in a specific order, however, this is merely to illustrate the specific embodiment and not to limit the order of the steps. In contrast, in various embodiments of the present invention, the order of the steps may be adjusted according to process adjustments.

At present, the yield and consistency of the bent terminal wire, particularly the terminal wire with a circular arc shape with a larger radian are poor. One of the reasons is that bending operation is carried out by adopting a pushing block forming process, the product is easy to rebound after being formed, and the rebound amplitude of each time is random. Therefore, the terminal wire often needs to be secondarily molded, and in order to reduce the times of secondary molding as much as possible, some production lines consider the springback allowance when designing the jig at present, namely the radian of the jig is larger than the actually needed molding radian. However, due to uncertainty of rebound, determination of the rebound allowance is difficult, repeated verification is usually required for each radian shape of each material to determine the rebound allowance of different bending radians of different materials, and even so, consistency and yield of the final formed product cannot be guaranteed. To improve this phenomenon, the inventors have found that the amplitude of springback increases with the increase of the arc bending radian and radius in the bending operation, and based on this finding, the inventors decompose the large arc to be bent in the terminal wire into a plurality of straight lines and small arcs, so that the springback is almost negligible because the straight lines do not spring back, and the radian and radius of the small arcs are smaller, and therefore, the formed product has small radian springback and improved consistency according to the terminal wire formed by this method.

The embodiments of the present invention will be further described with reference to the drawings.

Fig. 1 shows a schematic structural view of a bent terminal wire according to an embodiment of the present invention. As shown in fig. 1, a bending terminal line includes N bending points 101 and 102 … N, where the N bending points are sequentially connected, and the end points of the N bending points are located on the same section of circular arc, where N is a natural number, and the shape of the circular arc is consistent with the shape to be bent of the bending terminal line, that is, the radian and radius of the circular arc are the same as the radian and radius of the shape to be bent.

As shown, in one embodiment of the present invention, each of the bends 101, 102, … N includes a circular arc-shaped corner, which is connected to the adjacent bend by a straight edge, and the radian and radius of the corner are smaller than the radian and radius of the circular arc formed by each bending end point. In order to simplify the manufacturing of the jig, in an embodiment of the present invention, the bent angles of the bends 101 and 102 … N have the same shape, specifically, the radian and the radius of the bent angle of each bend are the same, and the straight edge length of each bend is the same.

The method for manufacturing the bent segment sub-line is specifically described below. The manufacturing method of the bent terminal wire comprises the following steps:

first, the shape of each bend is determined. In one embodiment of the present invention, in order to facilitate the manufacture of the fixture, the shape to be bent is equally divided into N sections, and any section is designed in the form of a straight edge bending angle, the bending shape of any section is symmetrical with respect to the axis of the circular arc of the section, and meanwhile, the length L of any bending straight edge is calculated as follows:

L＝aπR/360N，

wherein,,

a is the radian of arc-shaped bending to be bent;

r is the radius of the circular arc-shaped bend to be bent,

taking the embodiment shown in fig. 1 as an example, describing the step specifically, the arc AB is an actual shape to be bent, the radian is a, the radius is R, in the embodiment shown in the figure, the arc AB is equally divided into 4 equal parts, then the radian b=a/4 of any one arc equal to the arc, taking one arc AC as an example, the corresponding bending includes straight sides AD and CD, the AD length is equal to the CD length, and is equal to half (api R/(360×4)) of the radian AC length, and the D is designed to be a bent angle, and the radius of the bent angle is 0.01-0.1mm;

next, a jig is fabricated. According to the shape of each bend determined in the previous step, a jig is manufactured, and in one embodiment of the invention, the jig is manufactured by adopting an aluminum plate or an bakelite plate; and

finally, the terminal wire is molded. And through a pushing block forming process, bending operation is performed according to the jig, so that terminal wire forming is realized.

In order to verify the practical technical effect of the invention, terminal wires with radian to be bent of 90+/-5 degrees and radius of 5mm are manufactured by adopting the conventional jig and the method in the embodiment of the invention, wherein the radian is equally divided into 5 equal parts in the method in the embodiment of the invention. Finally, the test results are shown in table 1, after 24 hours, the actual measurement value of the radian of the terminal line manufactured by the method in the embodiment of the invention completely meets the requirements, and in the 10 groups of tested terminal lines, the maximum difference value of the actual measurement value of the final radian is only 3 degrees, so that the product consistency is high. The rebound amplitude of the terminal wire manufactured by the traditional jig is large in 24h, so that only one group of terminal wires tested by 10 groups meets the requirement, and meanwhile, the difference between the groups is large, and the maximum difference is 25 degrees.

TABLE 1

According to the manufacturing method of the bending terminal line, the bending quantity is not required to be considered, the radian requirement required by a product can be met through one-time design, and the product is small in rebound, good in stability and high in consistency.

While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to those skilled in the relevant art that various combinations, modifications, and variations can be made therein without departing from the spirit and scope of the invention. Thus, the breadth and scope of the present invention as disclosed herein should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims

1. The utility model provides a terminal line of bending, its characterized in that is through ejector pad shaping technology, carries out bending operation according to the tool and makes, the terminal line of bending includes a plurality of continuous bending in proper order, just a plurality of extreme points of bending all are located on the first circular arc, the radian of first circular arc equals the radian that the terminal line of bending needs to be buckled, wherein arbitrary the bending includes a bent angle and two straight flange, there is the contained angle between the straight flange of bending and the straight flange of adjacent bending, the tool is according to the bent angle radian and the straight flange length preparation of every bending and is obtained, the bent angle radian and the straight flange length of every bending are confirmed after decomposing the circular arc of waiting to bend into the multistage.

2. The bent terminal wire according to claim 1, wherein the straight sides of the plurality of bends are the same length and the angle and arc are the same.

3. The bent terminal wire of claim 2, wherein the straight edge length L of the bend is calculated as follows:

L=aπR/360N，

wherein,,

a is the radian of the first circular arc;

r is the radius of the first arc; and

and N is the number of bends in the bent terminal line.

4. The bent terminal wire according to claim 2, wherein the radius of the bent corner is 0.01-0.1mm.

5. The bent terminal wire according to claim 1, wherein the circular arc bending to be bent is decomposed on average.

6. The bent terminal strip of claim 1, wherein the jig is made of aluminum or bakelite plate.