JPH0518232B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing slider pieces used in precision variable resistors, slip ring devices, and the like.

(Prior art and its problems) Conventionally, in order to manufacture slider pieces used for precision variable resistors, slip-ring devices, etc.
As shown in Fig. 1b, a strip-shaped base material 1 is intermittently fed, and is punched into a predetermined shape by press working to form a material having a protrusion 2 for attaching a contact in the center and a protrusion for attaching a brush contact on the outside as shown in Fig. 1b. 3 in parallel, the contact mounting protrusion 2 and the brush contact mounting protrusion 3 at the center of the base material 4 are bent upward and tilted, and then as shown in Fig. 1c. The contact material 5 is resistance welded to the upper surface of the tip of the contact attachment protrusion 2 at the center of the base material 4, and then the brush contact 6 is attached to the brush wire attachment protrusion 3 on the outside of the base material 4 as shown in FIG. 1d. are resistance welded on the spacer 6a side, and then, as shown in FIG. was.

By the way, in such a method of manufacturing a slider piece, in order to make the center contact of the slider piece 8, the strip-shaped base material 1 is sequentially punched out by press working to form the base material 4, and each of the base materials 4 is punched out by pressing. Since the contact material 5 is resistance welded one by one to the top end of the contact mounting protrusion 2 provided in the center of the contact mounting projection 2, there are many steps, resulting in poor productivity and high cost.

(Objective of the Invention) The present invention has been made to solve this problem, and it is an object of the present invention to provide a method for manufacturing slider pieces that requires fewer steps and has good productivity.

(Structure of the Invention) In the method of manufacturing a slider piece of the present invention, as shown in FIG. This clad strip material 10 is intermittently fed forward and punched into a base material 11 of a predetermined shape as shown in FIG. Forming a contact piece 13 with the contact strip material 9 as a contact part 12, and bending and tilting the brush wire mounting protrusion 3 formed on the outer side upward,
A welding projection 14 is formed at the tip, and then the protrusion 3 for attaching the brush wire is formed as shown in Fig. 2c.
As shown in the figure, the brush wire 6b is connected to the projection 1.
The brush wire rod 6b is resistance welded in step 4, and then the tip of the brush wire 6b is bent as shown in FIG. .

In this way, in the method of manufacturing a slider piece of the present invention, in order to make the contact point at the center of the slider piece 15, the strip-shaped base material 1
The contact strip material 9 is pressed against the center part of the clad strip material 1.
0, and then the grading strip 10 is intermittently fed forward and stamped by press working. Therefore, as in the past, a strip-shaped base material is punched out to form the base materials, and the contact materials are resistance-welded one by one to the contact mounting protrusion provided in the center of each base material. This is a complicated process that requires precision. In the manufacturing method of the present invention, the process is included in the process of pressing the clad strip material 10 to form the contact piece 13, so the process is not only shortened, but also
Since the contact point at the center of the slider piece 15 is created continuously and the time required to create each piece is extremely short, the overall time for the slider piece 15 is shortened and productivity is improved. , and the production cost will be reduced.

Further, since the contact piece 13 at the center of the slider piece 14 is made as described above, unlike the conventional contact piece in which the contact material is resistance welded one by one to the contact mounting protrusion, each contact piece 13 is made as described above. The contact piece 13 has high dimensions and precision, and is stable with little variation, resulting in a slider piece 15 of good quality.

Next, specific embodiments of the present invention and conventional examples will be described.

(Example) As shown in FIG.
A contact strip material 9 made of Ag-Pd 30wt% of mm is pressure-welded to make an inlay-type clad strip material 10, and then this clad strip material 10 is intermittently fed progressively and press-formed as shown in Fig. 2b. Base material 1 with predetermined shape
1, and insert a hole in the center above the base end.
Two contact strips 13 with a width of 0.25 mm and a length of 6 mm are formed in parallel and on the outer side, with a contact strip 9 having a 25-degree angle bending angle and a contact strip 9 that can be bent into a semicircular shape of 0.5 R as the contact portion 12. The brush wire attachment protrusion 3 is bent upward by 30 degrees, and then the second brush contact attachment protrusion 3 is attached to two brush contact attachment protrusions 3 with a width of 1 mm and a length of 4 mm formed on the outside of the base material 11. As shown in Figure c, the wire diameter is 80μ.
Pd35wt%, Ag30wt%, Au10wt%, Pt10wt%,
Five brush wire rods 6b made of 14wt% Cu and 1wt% Zn are arranged in rows and resistance welded using a brodge extension 14 with a width of 0.2 mm and a length of 6 mm, and then the tip of the brush wire rods 2b is attached as shown in Fig. 2d. It bends as if
The contact portion 7 was formed to produce the slider piece 15.

(Conventional example) As shown in Fig. 1a, a band-shaped base material 1 made of nickel silver with a thickness of 0.15 mm and a width of 15 mm is intermittently fed and punched into a predetermined shape by press working, as shown in Fig. 1 b. As shown in FIG. The contact mounting protrusion 2 and the brush contact mounting protrusion 3 at the center of the base material 4 are bent 25 degrees upward and then the contact mounting protrusion at the center of the base material 4 is tilted as shown in FIG. 1c. Diameter 0.8mm on the top surface of the tip of 2.
A contact material 5 made of 30 wt% Ag-Pd with a thickness of 0.3 mm is resistance welded, and then wires are attached to the two brush contact mounting protrusions 3 formed on the outer side of the base material 4 as shown in Fig. 1d. A brush contact 6 in which five brush wires 6b made of the same alloy as in the example with a diameter of 80μ are arranged and resistance welded to a spacer 6a made of 30wt% Cu-Ni with a width of 0.7mm, a length of 0.8mm, and a thickness of 0.2mm. resistance welded on the spacer 6a side, and then Fig. 1e
As shown in the figure, the tip of the brush wire 6b of the brush contact 6 was bent to form a contact portion 7, and a slider piece 8 was made.

However, when comparing the manufacturing time of the slider pieces of the example and the conventional example, it was found that the manufacturing time of the slider piece of the example was about 1/2 that of the conventional example. It was found that the process time was shortened and productivity was significantly improved. Further, the contact portion of the contact piece at the center of the slider piece of the example had little error and high dimensional accuracy, unlike the contact point at the center of the slider piece of the conventional example.

(Effects of the Invention) As detailed above, according to the method for manufacturing a slider piece of the present invention, the contact point at the center of the slider piece is attached to the clad strip by pressing the contact strip material into the center part of the strip base material. It is made by making a piece of material, then feeding it intermittently and punching it by press working, so the process is shortened compared to the conventional method, and the manufacturing time for each contact piece is extremely short. The manufacturing time of the entire mover piece is shortened, productivity is improved, and production costs are reduced.

Further, according to the method of manufacturing a slider piece of the present invention, the contact piece at the center of the slider piece can be made stable with high dimensional accuracy and little variation, and a slider piece with good quality can be obtained. It has the following effects:

[Brief explanation of the drawing]

1A to 1E are diagrams showing the steps of a conventional slider piece manufacturing method, and FIGS. 2A to 2D are diagrams showing the steps of the slider piece manufacturing method of the present invention.

Claims (1)

[Claims] 1 A contact strip material is pressure-welded to the center of a strip-shaped base material to make a clad strip material, and then this clad strip material is intermittently progressively fed and punched into a base material of a predetermined shape by press working, and the center portion is Form a contact piece having a contact strip as a contact part which is bent upward from the base end and bent at the tip, and the protruding part for attaching the brush wire formed on the outside is bent upward and inclined, and then the brush A method for manufacturing a slider piece, characterized by resistance welding a brush wire to a protrusion for attaching the wire, and then bending the tip of the brush wire to form a contact part to make a slider piece. .