JPH0149566B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a contact member formed by cutting or punching a strip of metal material into narrow slits. The purpose is to suppress deformation due to processing strain during slitting.

Generally, strips used for connector parts and the like are often 15 to 30 mm wide, and these are stamped and formed by press processing and used as contact members. As shown in Fig. 1, when the strip material 10 is formed into a comb tooth-like shape by press working, the shape of the material after punching is as shown in Fig. 2, due to the distortion caused by the slitting process when forming the strip material. Therefore, it was easy to bend and rise, which was a big problem in press working.

The present invention solves the above-mentioned drawbacks by chamfering the strip before cutting or stamping to form the contact member.

Examples of the present invention will be described below.

Example 1 As shown in Fig. 3, the edge of a strip 10 that has been subjected to slitting processing (a process in which a plate material, which is a raw material for a contact member, is cut into strips with a narrow width using a rotary cutter, etc.) where processing distortion remains due to cutting. The corner portion 10a of the edge is cut using a cutting tool, and this is cut in the longitudinal direction of the strip 10.

By performing such chamfering, pressing could be easily performed without bending or rising caused by slitting.

Example 2 After performing the cutting process (chamfering process) similar to that shown in Fig. 3, the slitted edge portion 10b was continuously finished using a semicircular peeling die into a smooth state as shown in Fig. 4. , the strip material 10b is cut in the longitudinal direction.

As a result, press working could be easily performed without bending or rising caused by slitting.

Note that if the chamfered edge 10b is cut as the tip and used as the male pin 4 that engages with the female pin 5 of the connector 3, as shown in FIG. This is convenient because the resistance of time is reduced.

Example 3 In punching and press processing of a strip material that has been subjected to normal slit processing, when processing it into a comb tooth-like shape as shown in Fig. 1, both end edges where slitting burrs have occurred as shown in Fig. 6. Chamfering 10a
In this case, pressing could be easily performed without bending or lifting caused by slitting.

As described above, by chamfering the edges of the slitted strip and then cutting or punching the strip, the distortion caused by the slitting of the strip is removed, and the strip is free from bending. This has the effect of making machining easier by eliminating lifting up.

Incidentally, connectors and the like are plated to reduce contact resistance, but reliability can be further improved by applying plating after chamfering according to the present invention.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams showing a conventional method of manufacturing a contact member. Figure 1 is a perspective view showing the case of punching and pressing into a comb tooth shape, and Figure 2 is the punching process shown in Figure 1. It is a figure which shows the modification after performing. 3 to 6 are diagrams for explaining embodiments of the present invention, FIG. 3 is a schematic perspective view of a chamfered strip finished by cutting, and FIG. 4 is a skin after cutting. A schematic perspective view of a chamfered strip finished using a Muki die, Fig. 5 is a cross-sectional view showing an example of using the processed strip as a male pin of a male and female pin type connector, and Fig. 6 shows the edges of both ends. FIG. 3 is a perspective view showing a strip material with a chamfered portion. The same reference numerals in the drawings indicate the same or equivalent parts, 10 is a strip, and 10a is a chamfered portion of the strip.

Claims (1)

[Scope of Claims] 1. A slitting process of cutting a plate material to produce a strip; a process of chamfering the edge of the strip where processing strain remains due to the slitting; and a process of chamfering the edge of the strip that has been subjected to the chamfering process. A method for manufacturing a contact member, comprising the steps of: processing the contact member into a predetermined shape by cutting or punching press processing.