JPH02151326A - Method and device for caulking pipe-like parts - Google Patents

Abstract

PURPOSE:To execute caulking so as to be well-belanced from four directions by inserting pipe-like parts through a shaft provided with a groove, and applying roughly uniform caulking force in at least four direction in which each is allowed to abut to the pipe parts from the outside of the part against said groove. CONSTITUTION:Pipe-like parts 2 fitted to shaft-like parts 3 provided on a groove 5 are fixed, and from the outside of this parts 2 to the groove 5, opening parts of punches 1, 1' having a V-shape are caulked in the A direction. The punches 1, 1' come into contact with the parts 2, first, in four parts, and caulked, while applying roughly uniformly force in the B direction so as to be well-balanced from four directions by the V-shaped punches 1, 1'. As for an angle made by two sides of the V-shaped punches 1, 1', about a right angle is appropriate, and it is better to taper a cross section of the punches 1, 1'. By allowing plane parts 4, 4' of the punches 1, 1' to abut on each other with respect to the bottom dead center of caulking, the variance in strength of caulking can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method and apparatus for tightening a pipe-like part used when fixing a pipe-like part used as an intermediate shaft of a variable resistor, etc. .

Conventional technology The conventional technique will be explained with reference to FIGS. 7 to 10.

Fig. 7 is a partial side sectional view of fixing a pipe-like part to a shaft-like part, Fig. 8 shows another conventional example, and Fig. 9 shows a pipe-like part fixed to a shaft-like part with a flat punch. This is a diagram illustrating a fixing situation, and FIG. 1 is a cross-sectional view of the pipe-shaped component tightened according to FIG. 9.

According to FIG. 7, when fixing the pipe-like part 2 to the shaft-like part 3, conventionally an X-ring 6 is inserted into the groove 5 provided in the shaft-like part 3.
This was done by inserting the .

However, with the method of fixing with the X-ring 6, it is difficult to make the diameter of the X-ring 6 smaller if a certain strength is to be ensured.

Further, as shown in the conventional example shown in FIGS. 8 and 9, a groove 6 is provided in the shaft-like part 3, and the pipe-like part 2 is inserted into the groove 6 by the punches 1, 1' (F) 89. A method was thought of.

Problem to be Solved by the Invention However, it is difficult to sandwich and fit the pipe-shaped part 2 with the flat plate-shaped first and second punches 1° 1' as shown in FIG. 9, which are generally used for such tightening. and the pipe-shaped part 2 is the 70th
As it deforms into an oval shape as shown in the figure, there is a problem in that the diameter becomes considerably larger than the original diameter depending on the location.

The present invention is intended to solve these problems, and aims to provide a pipe-shaped component with a smaller diameter expansion.

Means for Solving the Problems In order to achieve the above object, the present invention provides first and second punches having a V-shape from the outside of a pipe-shaped component in which a shaft component with a groove is disposed inside the pipe. The present invention relates to a strangling method and a strangling device in which sharks are butted against each other.

Effects Therefore, according to the present invention, the first. By making the second punch V-shaped, the punch contacts the pipe-shaped part at four places, so the squeezing force is distributed to these four places, and the two punches press down on the expansion of the pipe-shaped part. This is done to reduce the spread of the diameter caused by shark sharks.

Embodiment An embodiment of the shark fish apparatus of the present invention is shown in FIGS. 1 to 6.

Figure 1 is a plan view (partial view), Figure 2 is a view of the same side, Figure 3 is a plane sectional view of the straight i1 where the punch pinches the pipe-shaped part, and Figure 4 is a cross-sectional view of the pipe-shaped part. 5 is an embodiment of the punch of the present invention, and FIG. S6 is a partially sectional side view of a variable resistor which is an applied example of the present invention. In addition, the same numbers are assigned to the same parts as in the conventional example 7.

According to FIGS. 1 and 2, the shaft-shaped part 3 provided in the groove 5
The pipe-shaped part 2 fitted into the pipe-shaped part 2 is internally fixed by a fixing means (not shown), and the groove 5 is phased from the outside of the pipe-shaped part 2 to form a first part having a figure 7 shape. second punch 1,1
The punches 1 and 1' are tightened so that the openings of the parts 1 and 2 are butted in the direction of the arrow (direction A), and as shown in Fig. 3, the punches 1 and 1' first come into contact with the pipe-shaped part 2 at four places, and as shown in Fig. 4. The pipe-like parts are 7-shaped punches 1, 1',
Well-balanced and almost evenly distributed from all four directions in the direction of the arrow (B direction)
It squeezes while applying force. Since force is applied to the pipe-shaped part 2 from four places in a direction that reduces the diameter of each other,
The diameter spread will be less.

The angle formed by the two sides of the V-shaped punch 1.1' is 90'.
The front and back are appropriate, and the cross sections of punches 1 and 1' should be tapered as shown in Figure 5, and the bottom dead center of the shark should be set at 1. Flat portion 4 of the second punch 1, 1'. By comparing the two, it is possible to reduce the variation in the strength of the sharks.

An example of the use of the present invention is shown in FIG. 6. According to FIG. 6, the clutch plate 12 is fixed to the operating shaft 10 by squeezing the pipe-shaped part 2 into the groove 11 of the operating shaft 1o.
0 is moved back and forth to drive one of the brush mounting plates 13, 14 (not shown), and the clutch plate 12 is engaged with one of the plates 16, 17 to drive the variable resistance section 15 or 15'. It is something that makes you

Note that 18 is a housing divided into a plurality of parts, which protects the inside and also protects the resistor 1 of the variable resistance parts 16 and 16'.
9.20 (not shown) and terminal section 21.22.23.24
is attached.

Effects of the Invention As is clear from the above-mentioned embodiments, the present invention allows pipe-shaped parts to be held in a well-balanced manner from four directions, and it is possible to reduce the expansion of the diameter of the pipe-shaped parts. It has the advantage of being able to reduce variations in strength, and when applied to electronic components such as variable resistors, it contributes to a reduction in the number of parts and miniaturization.

[Brief explanation of the drawing]

FIG. 1 is a plan view (partially a partial view) showing the relationship with the punchy pipe-shaped part according to the present invention, FIG. 2 is a side view (partially a partial view) of the same, and FIG. FIG. 4 is a plan sectional view of the series in which the punch tightens the pipe-shaped part, FIG. 4 is a plan sectional view after the punch is compressed, FIG. A partial side sectional view of a conventional technique in which a pipe-shaped component is fixed to a shaft-shaped component by tightening, FIG. 8 is a partial side sectional view showing another conventional technique, FIG. 9 is a flat punch, and FIG.
The figure is a plan view of the hooked part of a pipe-shaped part that was punched with a flat punch. 1.1'...Punch, 2...Pipe-shaped part, 3...Shaft-shaped part, 6...Groove. Name of agent: Patent attorney Shigetaka Awano and 1 other person 1st
Figure 1.1-・ -m- -15-... Figure 2 Punch RF Eve α Part Shaft Part Groove Figure 3 Figure 4 Figure 7 Figure Figure Figure

Claims (2)

[Claims] (1) A pipe-shaped part is inserted into a shaft provided with a groove, and a substantially uniform force is applied to the groove from the outside of the pipe-shaped part in at least four directions so that each part butts against the pipe-shaped part. ■A method for manufacturing pipe-shaped parts, which is characterized by adding (2) means for fixing a shaft provided with a groove into which at least a pipe-shaped part is inserted; A device for tightening pipe-shaped parts, comprising first and second V-shaped punches.