CN113540839A

CN113540839A - Bent terminal wire and manufacturing method thereof

Info

Publication number: CN113540839A
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: 2021-10-22
Anticipated expiration: 2041-06-22
Also published as: CN113540839B

Abstract

The invention discloses a bent terminal wire and a manufacturing method thereof, wherein a large arc to be bent is decomposed into N sequentially connected bends, any one bend comprises a small arc, and the small arc is connected with an adjacent bend through a straight edge, wherein N is a natural number.

Description

Bent terminal wire and manufacturing method thereof

Technical Field

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

Background

The terminal wire can be used for connecting more conveniently due to the fact that the number and the intervals of the wires can be selected at will, the size of an electronic product can be greatly reduced, production cost is reduced, production efficiency is improved, and therefore the terminal wire is widely applied to the space between a moving component and a main board, the space between a PCB and a small-sized electric appliance and used for data transmission.

In order to meet the interface requirements of different components, the terminal wire is usually required to be bent to achieve different bending angles or radians. At present, the terminal wire is mostly formed by adopting a push block, and the push block is simple in forming process and convenient to operate. However, when the terminal wire is bent by using the push block molding method, particularly when a large arc shape needs to be formed, springback is likely to occur after molding, which results in an unqualified final product shape.

Disclosure of Invention

In view of some or all of the problems in the prior art, the invention provides a bent terminal line, which includes N sequentially connected bends, and end points of the N bends form a first arc, where N is a natural number.

Furthermore, any one of the bends comprises two straight edges and a bend angle, and the bend angle is in the shape of an arc.

Furthermore, the straight sides of the N bends are the same in length, and the bending angles and the radians are the same.

In another aspect, the present invention provides a method for manufacturing the bent terminal line, including:

the method comprises the following steps of (1) bending and decomposing an arc to be bent into N sections, and determining the bent 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 by a push block forming process.

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

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

According to the bent terminal wire and the manufacturing method thereof, provided by the invention, a large arc needing to be bent in the terminal wire is decomposed into a plurality of straight lines and small arcs, so that the 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: one of the reasons that present terminal line yields is low lies in, and a lot of terminal lines all need to form arc and buckle, if adopt common ejector pad forming process, then very easily produce the resilience after the shaping to finally make the product nonconforming, produce the defective products, even if the amplitude of kick-backing is in permissible range, because resilience at every turn is not fixed, can have certain difference, and this uniformity that also can make the product is relatively poor. The inventor researches and discovers that the amplitude of springback is increased along with the increase of the arc bending radian and the radius in the bending operation, and based on the discovery, the inventor decomposes a large arc needing to be bent in the terminal wire into a plurality of straight lines and small arcs, so that the straight lines can not rebound, and the radian and the radius of the small arcs are smaller, so that the springback can be almost ignored, therefore, the terminal wire formed by the method has small rebound of the radian of the formed product, and the consistency is also 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 present 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, the same or corresponding parts will be denoted by the same or similar reference numerals for clarity.

Fig. 1 is a schematic structural diagram of a bent terminal line according to an embodiment of the present invention.

Detailed Description

In the following description, the present invention is described with reference to examples. 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. Further, it should be understood that the embodiments shown in the figures are illustrative representations and are not necessarily drawn to scale.

Reference in the 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 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 embodiment of the present invention describes the process steps in a specific order, however, this is only for the purpose of illustrating the specific embodiment, and does not limit the sequence of the steps. Rather, 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 bent terminal wires, particularly the bent terminal wires with large radian and circular arc are poor. One reason for this is that bending operation is performed by using a push block forming process, so that the product is very easy to rebound after forming, and the rebound amplitude of each time is random. This just so make terminal line often need the post forming, in order to reduce the number of times of post forming as far as possible, also have some at present to produce the line when designing the tool, has considered the resilience allowance, and the radian of tool is greater than the shaping radian of actual need promptly. However, due to the uncertainty of springback, the determination of the springback allowance is difficult, and usually, the springback allowance of different bending radians of different materials can be determined only by repeatedly verifying each radian shape of each material, and even so, the consistency and the yield of final molded products cannot be guaranteed. In order to improve the phenomenon, the inventor researches and discovers that the amplitude of springback is increased along with the increase of the arc bending radian and the radius in the bending operation, and based on the discovery, the inventor decomposes a large arc needing to be bent in the terminal wire into a plurality of straight lines and small arcs, so that the straight lines do not spring back, and the springback of the small arcs is almost negligible due to the small radians and the radius of the small arcs, therefore, the terminal wire formed by the method has small rebound of the radian of the formed product, and the consistency is also improved.

The solution of the invention is further described below with reference to the accompanying drawings of embodiments.

Fig. 1 is a schematic structural diagram of a bent terminal line according to an embodiment of the present invention. As shown in fig. 1, a bent terminal line includes

N bends

101 and 102 … 10N, the N bends are sequentially connected, and end points of the N bends are located on the same arc, where N is a natural number, and the shape of the arc is identical to the shape of the bent terminal line to be bent, that is, the radian and radius of the arc are identical to the radian and radius of the shape to be bent.

As shown in the drawings, in an embodiment of the present invention, each of the

bends

101 and 102 … 10N includes a bend angle in the shape of a circular arc, the bend angle is connected to the adjacent bend by a straight edge, and the bend angle has a smaller arc and radius than the arc formed by each bend end point. In order to simplify the manufacturing of the jig, in an embodiment of the present invention, the bending angles of the

bends

101 and 102 … 10N are the same, specifically, the radian and the radius of each bending angle are the same, and the lengths of the straight sides of each bending are the same.

The method for making the bending section sub-line is described in detail 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, to facilitate the manufacture of the jig, the shape to be bent is equally divided into N sections, and any one section is designed to be in a form of a straight-side bending angle, the bending shape of any one section is symmetrical with respect to the axis of the arc of the section, and meanwhile, the length L of any one section of the bending straight side is calculated as follows:

L＝aπR/360N，

wherein,

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

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

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

then, a jig is manufactured. Manufacturing a jig according to the shape of each bend determined in the previous step, wherein in one embodiment of the invention, the jig is made of an aluminum plate or a bakelite plate; and

finally, the terminal wire is molded. And bending operation is carried out according to the jig through a push block forming process, so that the terminal wire is formed.

In order to verify the practical technical effect of the invention, the terminal wire with the radian of 90 degrees +/-5 degrees and the radius of 5mm to be bent is respectively manufactured by the traditional jig and the method in the embodiment of the invention, wherein in the method in the embodiment of the invention, the radian is equally divided into 5 equal parts. Finally, as shown in table 1, after 24 hours, the measured values of the radian of the terminal wires manufactured by the method in the embodiment of the present invention completely satisfy the requirements, and in 10 groups of terminal wires tested, the maximum difference between the measured values of the radian is only 3 °, so that the product consistency is high. And the terminal lines manufactured by the traditional jig have larger resilience amplitude for 24h, so that only one group of 10 groups of tested terminal lines meets the requirement, and meanwhile, the difference between the groups is larger, and the maximum difference is 25 degrees.

TABLE 1

The manufacturing method of the bent terminal wire provided by the invention can meet the radian requirement of a product through one-time design without considering the over-bending amount of the design, and has the advantages of small product resilience, good stability and high 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 persons skilled in the relevant art that various combinations, modifications, and changes can be made thereto without departing from the spirit and scope of the invention. Thus, the breadth and scope of the present invention 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 which characterized in that, includes N consecutive buckles, just the terminal point of N buckles forms first circular arc, wherein, N is the natural number.

2. The bent terminal wire of claim 1, wherein any of the bends includes a bend angle connected to an adjacent bend by a straight edge, wherein the bend angle is a circular arc.

3. The bent terminal wire of claim 2, wherein the N bends have the same straight edge length and the same bend angle radian.

4. The bent terminal wire of claim 3, wherein the straight edge lengths L of the N bends are calculated as follows:

L＝aπR/360N，

wherein,

a is the radian of the first arc;

r is the radius of the first circular arc.

5. The bent terminal wire according to claim 3, wherein the radius of the N bending corners is 0.01 to 0.1 mm.

6. A manufacturing method of a bent terminal wire is characterized by comprising the following steps:

the method comprises the following steps of (1) bending and decomposing an arc to be bent into N sections, and determining the corresponding bend radian and straight edge length of each section;

and bending according to the jig by a push block forming process.

7. The method according to claim 6, wherein the arc to be bent is divided into N segments on average.

8. The method of claim 6, wherein the jig is made of an aluminum plate or a bakelite plate.