JPH0341246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention mainly relates to a method of manufacturing a metal shell of a rectangular cable-side connector for an interface.

[Prior Art] As is well known, a rectangular cable side connector as an example of an interface has a cylindrical body part for inserting a cable and a shell body part, and the outside is covered with a cast molded insulator. It consists of an overlying metal shell and an insulator with female pins mounted within the shell.

Conventionally, the metal shell is formed by molding the shell main body and the cylindrical body for cable insertion separately and soldering them to form a shell, although not particularly shown in the drawings, or by forming two symmetrical shells. A shell was constructed by joining shell bodies that were molded separately, and the metal shell was covered with a cast-molded insulator.

[Problem that the invention seeks to solve]

Therefore, in the past, manufacturing work was inefficient and costly because it required work to braze the shell body and the cylindrical body, or to integrally join two shell bodies together. Not only does this increase the cost, but it also causes problems such as poor soldering and poor bonding, resulting in poor reliability.

The present invention has been made to solve these conventional problems.

[Means for solving problems]

For this purpose, the present invention includes a punching process in which a flat metal material is punched into a desired shape, and a die in which the punched product is sequentially squeezed to integrally form a shell body and a cylindrical body for cable insertion. a drawing step, a trimming step of trimming the drawn product, a punching step of punching a hole for cable insertion into the cylindrical body portion, and a step of enlarging the opening of the cable insertion hole with a taper punch. It is characterized by a configuration consisting of.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a metal shell 1 obtained by the present invention.
0, and FIG. 2 is a half-sectional view taken along the line 2-2 of the same as above. In the same figure, the metal shell 10 is left-right symmetrical, and has a rectangular cylindrical shell main body 11 and a cylindrical tube for inserting the cable. It is constructed by integrally molding the body portion 12.

The shell main body 11 has a rectangular vertical section 11a.
It has a trapezoidal longitudinal section portion 11c extending integrally through the portion 11a and the stepped portion 11b, and tongue portions 11d having holes 11e are integrally extended at both ends of the portion 11a. ing.

The cylindrical body part 12 for cable insertion is provided in the center of the shell main body part 11c with a diameter substantially equal to the width of the part 11c, and the opening part 12a is used as an insertion guide for a cable (not shown). It is formed in a tapered shape that expands slightly outward.

This metal shell 10 is manufactured by the steps shown in FIG. 3 and subsequent figures.

First, a flat metal material having a predetermined thickness is punched out to form a slightly laterally elongated octagonal plate 100 (see FIGS. 3 and 4).

Next, as shown in FIGS. 5 to 14, this punched and formed plate 100 is subjected to die drawing processing at a predetermined drawing rate over 10 stages between a predetermined drawing punch A and a drawing die B in each step. Tsute molding 1
01 to 110 are molded.

That is, the central cylindrical body part 12 is formed by the first to fourth die drawing processes shown in FIGS. 5 to 8, and then the 5 parts shown in FIGS.
The part 11'c corresponding to the trapezoidal part 11c is drawn by the next and sixth die drawing processes, and then the part 11' corresponding to the rectangular part 11a is drawn by the seventh die drawing process shown in FIG. Squeeze 'a,
Next, the step portion 11b is squeezed by the 8th-order die drawing shown in FIG. 12 to form the trapezoidal portion 11c, and then the 9th-order and 10th-order die drawing shown in FIGS. 13 and 14 are performed. Rectangular part 11 by
Form a.

Next, molded product 1 obtained by die drawing
10 in the trimming process shown in FIGS. 15 to 17, the hatched portion 1 shown in plan in FIG.
Cut 00a.

Next, the upper surface of the cylindrical body part 12 is punched to form a cable insertion hole (see FIG. 18), and then,
The cylindrical body opening 12a is slightly enlarged using a taper punch and a die (not shown) to form a guide for cable insertion, and if necessary, a hole 1 is formed in the tongue portion 11b using a hole punch (not shown).
1e is drilled (see FIG. 19) to obtain a metal shell 10, which is the desired product shown in FIGS. 1 and 2.

The processing in each process is carried out continuously and automatically according to conventional methods, and the drawing ratio, diameter of the die and punch, etc. are set depending on the size and shape of the target metal shell, and are not uniform. .

〔Effect of the invention〕

According to the present invention, the shell main body and the cylindrical body are integrally molded by die drawing, so productivity can be increased, costs can be reduced, and advantages can be achieved. Since the entire metal shell is a one-piece molded product and has no joints, there are no problems such as poor joints, and the product has the advantage of being able to obtain a product with excellent reliability. It is.

[Brief explanation of drawings]

Fig. 1 is a plan view of a metal shell obtained by the present invention, Fig. 2 is a half-sectional view taken along line 2-2 of the same as above, Fig. 3 is a plan view of a stamped product, and Fig. 4 is a plan view of the same as above. 4-4 line, Figures 5 to 14 are half cross-sectional views of each molded product in the die drawing process,
Fig. 5 is a plan view of the molded product shown in Fig. 14, Fig. 16 is a sectional view taken along line 16-16, Fig. 17 is a half sectional view showing the trimming process, and Fig. 18 is a cross-sectional view of the molded product shown in the punching process. A half cross-sectional view of the molded product obtained, 1st
FIG. 9 is a cross-sectional view of the molded product obtained in the final step. 1... Shell main body part, 12... Cylindrical body part, 12
a...Tapered opening, 100...Punching molded product, 101-110...Drawing molded product, 100a
...Trimming part.

Claims (1)

[Claims] 1. A punching process in which a flat metal material is punched and formed into a desired shape, a die drawing process in which the die-drawn product is sequentially squeezed to integrally form a shell main body and a cylindrical body for inserting a cable, and the die-drawn product A metal shell for a rectangular connector, which comprises a trimming step of trimming the cylindrical body, a punching step of punching out a hole for cable insertion in the cylindrical body portion, and a step of expanding the opening of the cable insertion hole with a taper punch. manufacturing method.