JPS61109221A - Manufature of bored type clad button contact - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing perforated clad button contacts for use in switches, relays, etc.

(Prior art and its problems) Conventionally, in order to make a perforated clad button contact, as shown in FIG. I punched it out and made a perforated type and a topotan contact 4.

However, in this manufacturing method, a large amount of scrap was generated, and the yield was only about 30% at most, resulting in extremely poor productivity. Moreover, it takes a lot of time and money to recycle a large amount of scrap, and the perforated clad button contacts 4 end up being expensive.

(Objective of the Invention) The present invention was made to solve the above problems, and it reduces the generation of scrap, significantly improves yield, increases productivity, and significantly reduces the time and cost required for recycling scrap. It is an object of the present invention to provide a method for manufacturing a perforated clad button contact point that can reduce production costs.

(Structure of the Invention) The method for manufacturing a perforated clad button contact of the present invention involves transporting a contact material and a base material of a required length, stopping them so that they overlap at the front position of the die spin hole of a medium die, and then The first punch is advanced to press the contact material and base material against the die pin and crush them to form a clad contact material, and at the same time, the middle die is moved back inside the die and a circular hole is made in the center of the clad contact material using the die pin. Then, the clad contact material is crushed with a second punch with a hole into which the die pin can fit, making it flat in the die, and then the die pin is extruded to punch out the center part of the flat clad contact material. This is a characteristic feature.

(Example) Before explaining an example of the method for manufacturing a perforated clad button contact of the present invention, an example of the manufacturing apparatus will be described in the first example.
This will be explained using figures. Reference numeral 5 denotes a die, and a medium die 6 is provided on the die 5 so as to be movable back and forth, and an elastic body 7 made of urethane rubber or the like is disposed on the rear side thereof. A die pin 9 is provided in the die pin hole 8 at the center of the medium die 6 so as to be movable forward and backward, and is normally retracted into the die pin hole 8. 10 is a punch holder that is movable up and down;
A punch pin 13 is provided in a pin hole 12 at the center of the punch so as to be movable forward and backward, and normally protrudes from the pin hole 12.

The tip of the pin hole 12 is expanded into a trumpet shape with a taper 14 attached thereto. 15 is a punch holder that can move up and down;
A second punch that is provided so as to be able to advance and retreat from the second punch 1.
5 has a hole 16 into which the die pin 9 can fit, and a scrap drop hole 18 is connected to the back of the hole 16 at a right angle downwardly through an arcuate bent portion 17. Hemispherical recesses 19 for forming projections are provided at equiangular triangular positions around the hole 16 on the front surface of the second punch 15 .

Next, a method of manufacturing a perforated clad button contact according to the present invention using the manufacturing apparatus configured as described above will be explained with reference to FIGS. 2g to 2g. First, as shown in Fig. 2g (diameter 1.8 m, length 1.9 + n) Ag-CdO 12%
A contact material 20 consisting of a diameter of 1.8 and a length of +1° 2.
The base material 21 made of 8u of Cu-Ni 4.5% is transferred by a transfer device (not shown) to the front position of the die pin hole 8 of the die 6 with a diameter of 1.3 mm in the middle of the diameter 4 of the die 5. Stop to polymerize. Next, the punch pin 13 of the first punch 10 is advanced, and the contact material 20 and the base material 21 are pressed against the die pin 9 by the punch pin 13 as shown in FIG. 2C. advance only the outer side 10a of the die 5 until it comes into contact with the die 5, and move the inner die 6 back inside the die 5,
Furthermore, as shown in FIG. 2d, only the punch pin 13 is advanced,
The middle die 6 is further moved back inside the die 5 to release the contact material 20.
The base material 21 is formed into a truncated cone shape and pressed together, and a circular hole 23 is formed in the center using a die pin 9 for preforming. Next, the first punch 10 is retreated together with the punch pin 13 to return to their original positions (positions shown in Fig. 2 g), and then the punch holder is raised and the second punch 15 is inserted into the die as shown in Fig. 2 e. Align with 5 and stop. Next, as shown in FIG. 2f, the second punch 15 is advanced to crush the preformed clad contact material 22 and form it into a flat shape in the die 5, while forming hemispherical recesses at equiangular triangular positions on the front surface of the second punch 15. In step 19, a point projection 24 is formed on the outer surface of the clad contact material 22 on the base material 21 side. After that, Figure 2g
As shown in the figure, the die pin 9 is extruded to punch out the circular hole 23 in the center of the flat clad contact material 22, and the punched scrap 25 is pushed into the hole 16 of the second punch 15. A perforated clad button contact 26 with point projection 24 is thus produced. At this point, the perforated clad button contact 26 with the projection 24 is connected to the second punch 15 as it retreats to its original position, the punch holder descends, and the first punch 1
0 is located in the die 5, the die pin 9 retreats to its original position, and the middle die 6 moves forward to its original position, thereby falling away from the inside of the die 5.

Furthermore, when the above-mentioned manufacturing process is repeated twice, the punched scrap 5 pushed into the hole 16 of the second punch 15 is pushed out into the subsequent punched scrap 25, forming an arc-shaped bent portion as shown in FIG. 2g. 17 and fall through the scrap drop hole 18.

Note that the above embodiment is a case in which a general perforated clad button contact 26 is manufactured, but when manufacturing a perforated clad button contact 26' with a membrane as shown in FIG.
It is preferable to replace the middle die 6 of the die 5 with a middle die 6' having a stepped portion 6a at the peripheral edge of the die pin hole 8, as shown in FIG. Further, although the perforated clad hokun contact 26 is provided with point projections 24, the number of point projections 24 is not limited to three, and a ring projection may be used instead of the point projections 24. Alternatively, the projection may be replaced without the projection, and the second punch 15 may be replaced with a corresponding one during manufacturing.

(Effects of the Invention) As can be seen from the above explanation, the method for manufacturing the perforated type Tala-no-do button contact of the present invention is different from the conventional method of manufacturing the perforated-type Tala-no-do button contact by punching a large number of composite plates into ring shapes. The clad contact material is made by pressure-welding the contact material and the base material, which is then crushed and formed into a button shape of the desired diameter, and the center is punched out to make the perforated clad contact material, so there is no scrap. Only the center punching part is left, eliminating the large amount of scrap on the outer periphery of the press punching ring in the conventional method, significantly reducing the number of scraps, and greatly improving the yield to about 75-90%. Productivity has improved significantly. In addition, since the amount of scrap generated is small, the time and cost required for recycling this scrap are significantly reduced, so the production cost of perforated clad contacts can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a manufacturing apparatus used in the method for manufacturing a perforated type thalassotohotane contact of the present invention, FIGS. The figure shows another example of the perforated clad button contact that can be made by the manufacturing method of the present invention, and Figure 4 shows the inside of the manufacturing equipment used to make the perforated clad button contact shown in Figure 3. FIG. 5 is a diagram showing the shape of the die, and is a diagram showing a conventional method for manufacturing a perforated type Tallanod button contact. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. Figure 1 12: and 1st 19:
Thickness 5γ Fig. 2 (CI) Fig. 2 (b) Fig. 2 (9) Fig. 4 Fig. 5 [Yes]/4

Claims (1)

[Claims] The contact material and the base material of the required length are transferred and stopped so that they overlap at the front position of the die spin hole of the medium die, and then the first punch is advanced to press the contact material and the base material against the die pin, The material is then crushed to form a clad contact material, and a medium die is moved back inside the die to form a circular hole in the center of the clad contact material using a die pin for preforming, and then a hole into which the die pin can fit is formed. A method for producing a perforated clad button contact, which comprises crushing the preformed clad contact material with a second punch to make it flat in a die, and then extruding a die pin to punch out the center of the flat clad contact material. .