JPH02155523A - Compound caulking device for parts supplying hoop material - Google Patents

Abstract

PURPOSE:To cut and caulk the brush of a resistor at the same stage by composing a compound caulking device for supply parts of hoop material for the knob of a semi-fixed variable resistor of a base material hoop cutting die and a cutting and a caulking punch moving vertically under it. CONSTITUTION:A stripper plate 37, a base material hoop 12 and the cutting die 31 are attached by both springs 32, 38, a caulking punch 39 is lowered as far as the bottom surface of the base material hoop 12, then, the cutting die 31 is lowered to cut the brush 13. When the brush 13 is guided by the sides of a pilot pin 36 and the cutting die 31, the base material hoop 12 falls and the brush continues to fall further, while it is attached to the upper surface of the cutting punch 35 and the lower surface of the base material hoop 12. When the press passes the bottom deal center, the bottom surface a rivet 14 is pressed by a caulking punch 39 and the pilot pin 36 and the brush can be cut and caulked at the same stage.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a knob for changing the resistance value of a semi-fixed variable resistor (
This invention relates to a composite scissors device for a hoop material supplying part (a part having a driver groove and a rotating element for changing the resistance value).

BACKGROUND OF THE INVENTION In recent years, semi-fixed variable resistors have become smaller as equipment has become smaller. Conventionally, as shown in Figures 6a to 6d, brushes 1 and knobs were supplied with hoop material. The rivet connecting portion 3 of 2 was provided separately from the center of rotation of the knob 20. Therefore, by piloting the center of rotation of the knob 2, it was possible to easily combine the two.

Problems to be Solved by the Invention The brush used this time has a thickness of about OA2MM and a diameter of about 1mm.
It is approximately disk-shaped with 8CIIN, and no rivet joints can be provided anywhere other than the center of rotation of the brush.

Furthermore, it is difficult to hold individual brush pieces cut from the hoop material, and it is not possible to move them separately during the cutting process and the wringing process. Therefore, cutting and scissoring must be performed within one stroke without moving the brush parts supplied in a hoop state within the mold, but conventionally it is not possible to perform these two processes. It had become a thing.

The present invention eliminates the above-mentioned drawbacks of the prior art and provides a composite clamping device for hoop material supply parts that can perform the cutting and scissoring processes within one stroke.

Means for Solving the Problems The technical means of the present invention for solving the above problems comprises a cutting die for positioning and holding a substrate hoop incorporating a rivet in the upper part, and below the cutting die, the center of the substrate hoop is positioned below the cutting die. A cutting punch is provided that can slide up and down using the pilot pin as an axis, and presses the head of the rivet built into the base material hoop set on the top surface of the cutting die. The structure is such that a punch is provided.

Operation By having the above-described structure, it becomes possible to cut and clamp the rivets and brushes supplied in the form of a hoop within the same mold and in one stroke.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. First, the configuration of the composite suppressing device for hoop material supply parts of the present invention will be explained. FIG. 2 shows the flow and steps of each hoop in one embodiment of the present invention. 11 is a rivet hoop,
14 is a rivet, 12 is a base material hoop, and A in FIG.
A rivet 14 is incorporated in the section. Reference numeral 13 denotes a brush hoop, which is made of nickel silver material with a thickness of 0.12ffff in this embodiment. At section B, the brush hoop 13 is cut to form a brush 16 which is fastened to the rivet 14 of the base material hoop 12. 3a and 3b show the size relationship of each part, and since the cutting position of the brush 15 is within the bottom surface of the base material hoop 12 at the c-c position shown in FIG. This shows that it is impossible to cut with. Next, the first page, FIG. 4, is an enlarged view of the cut and hooked portion of the brush 1 [5. FIG. 4 shows the relative position at feed line height. 31
Holds the substrate hoop 12 and moves the brush 15 from the brush hoop 13
32 is a spring that supports the cutting die 31, 33 is a knockout plate that receives the brush hoop 13, 34 is a spring that supports the knockout plate 33, and 35 is a brush A cutting punch 36 has the function of cutting the brush 15 from the hoop 13 and bringing the cut brush 15 into contact with the base material hoop 12;
37 is a stripper plate, 38 is a spring that holds down the stripper plate 3, and 39 is an erosion punch.

FIG. 1 shows a state in which the machine is being lowered toward the bottom dead center by a press (not shown). Reference numeral 41 indicates a spring supporting the cutting punch 36, and its spring force is set to be stronger than the cutting load of the brush 16. Reference numeral 42 indicates a bottom plate, which receives the lower surface of the cutting punch 36 at the bottom dead center of the press. 43 indicates a pyro pin holder. FIG. 6 shows the bottom surface of the rivet.

Next, the present invention will be explained in detail. Spring 3B in Figure 4
Since the spring force of the spring 32 is set weaker than that of the spring 32, the stripper plate 37 and the base material hoop 1
2 and the cutting die 31 are in close contact with each other, the cutting die 31 does not descend immediately, but starts descending after the scissor punch 39 descends to the bottom surface of the base material hoop 12 and becomes in an overhanging state. The outer diameter of the pilot pin 36 is approximately 0.02 with respect to the brush hole diameter 16.
πm minus, and as shown in Figure 1, the cutting die 3
1 and the cutting punch 36 contact the bottom of the rivet 14 before sandwiching the brush hoop 13, and function as a pilot pin 36 for the cut brush 15.

Next, as the press descends further toward the bottom dead center as shown in FIG. 1, the brush 15 is first cut. The substrate hoop 12 is lowered with the cut brush 15 being guided by the pilot pin 36 and the side of the cutting die 31, brought into close contact between the upper surface of the cutting punch 36 and the lower surface of the substrate hoop 12, and then further lowered. Continue.

With the above second structure, when the press passes the bottom dead center, the bottom surface of the rivet is pressed by the damping punch 39 and the pilot pin 36 and is formed into the shape shown in FIG. 6, completing the tightening.

Effects of the Invention As described above, according to the present invention, cutting and pinning of the brush can be performed in the same process, and its practical effects such as miniaturization of the product and simplification of the rivet shape are significant.

[Brief explanation of the drawing]

FIGS. 1 and 4 are explanatory diagrams showing the brush cutting and compacting processes of a composite scissoring device for hoop material supply parts in an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the processes in an embodiment of the present invention. , FIGS. 3a and 3b are explanatory diagrams showing the size relationship of each part,
Figure 5 is an explanatory diagram showing the shape of the bottom of the bed after scissoring,
FIGS. 6a to 6d are explanatory diagrams showing the shapes of conventional brushes and knobs. 11... Rivet hoop, 12... Base material hoop, 13... Brush hoop, 14... Rivet, 16... Brush, 16... ... Brush hole diameter, 31 ... Cutting die, 32 ... Spring, 33 ... Knockout plate, 3
4・・・Spring, 36・Old Pa cutting punch, 3
6... Pilot pin, 37... Stripper plate, 38... Spring, 39...
Old Shark Mehanchi, 41...Spring, 42...
...Bottom plate, 43...Name of pilot pin holder agent, patent attorney Shigetaka Awano, and 1 other clause! Figure ◇ Figure Figure Figure Figure

Claims (1)

[Claims] A cutting die is provided that positions and holds a base material hoop incorporating a rivet at the top, a through hole is formed below the base material holding part of this cutting die, and a through hole is formed below this cutting die centered on the central axis of the rivet. It is equipped with a pilot pin that aligns the axes, and moves up and down using this pilot pin as an axis to cut the brush hoop material supplied along the lower surface of the cutting die, and transfer the brush cut from the brush hoop material to the cutting die. A hoop material supply part comprising a cutting punch that is brought into contact with the lower surface of the base material along the through hole, and a hole punch that presses the head of the rivet incorporated in the base material hoop on the upper surface of the cutting die. Composite ■me device.