JPH0522352Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a molding device for molding, for example, a ball contacting portion of a flange-shaped ball receiver of a bearing.

[Conventional technology]

Conventionally, when manufacturing a flange-type ball receiver A for a bearing as shown in Fig. 4, a cylinder body 2 with a flange 1 as shown in Fig. 3 is formed by forging or casting, and then all surfaces are cut. Along with processing,
An arcuate surface portion 3 (as shown in FIG. 4) is provided at the interface between the outer cylindrical body 2 and the flange 1, which closely adheres to a portion of the outer periphery of the ball.

[The problem that the idea aims to solve]

Cutting the arcuate surface requires a high level of skill, and is also time consuming, resulting in an increase in cost.

In addition, since a good surface roughness cannot be obtained by cutting, there is a problem in that the ball is scratched, which may cause malfunctions.

Therefore, the object of this invention is to provide a molding apparatus that can pressurize and mold an arcuate surface part and obtain good surface roughness.

[Means to solve the problem]

In order to achieve the above object, this invention provides a support member at the lower end of a spindle that is rotated by a motor and moves up and down in an appropriate manner, and the support members are provided at uniform predetermined distances from the center of the lower surface of the support member. A plurality of parallel rotating shafts are rotatably supported in the member from the middle to the upper end, and a ball portion for forming an arcuate surface portion is provided at the lower end of each rotating shaft.

[Effect]

After placing the flanged cylindrical body on the receiving jig, while lowering the spindle rotated in one direction by the motor, the lower end of the rotating shaft of the supporting member, which is also rotating, is inserted into the cylindrical body. Due to the contact between the ball part of the shaft and the inner peripheral surface of the cylinder, the inner peripheral surface of the cylinder becomes a mirror surface, and when the ball reaches the interface between the cylinder and the flange, the interface part becomes a mirror surface of the ball. It is molded into a mirror-like arcuate surface that closely contacts a portion of the outer periphery.

〔Example〕

Hereinafter, a molding device according to this invention will be explained based on the accompanying drawings.

As shown in FIGS. 1 and 2, the motor 11
At the lower end of the spindle 12, which is rotated by and raised and lowered in an appropriate manner, a supporting member 13 which rotates together with the spindle 12 is provided.

The method of raising and lowering the spindle 12 is as follows: In the illustrated case, the cylinder 15 is supported by the column 14, and
A spindle 12 is passed through and supported on the axis of the piston shaft 16 so that it moves up and down together with the piston shaft 16 by the action of the cylinder 15.

In addition, the support member 13 has a screw hole 17 in the illustrated case.
The spindle 12 is screwed together with the screw shaft 18.
It is installed on.

Reference numeral 19 denotes a plurality of parallel rotating shafts that are rotatably supported within the support member 13 from the middle to the upper end thereof, each at a uniform predetermined distance from the center of the lower surface of the support member 13.

In the illustrated case, two rotating shafts 19 are arranged in parallel, but two or more may be arranged.

Further, at the lower end of each rotating shaft 19, a ball portion 20 for forming an arcuate surface portion is provided.

In addition, the above-mentioned ball part 20 is treated with a material having excellent abrasion resistance, or is made of a material with excellent wear resistance.

With the above configuration, first, the cylinder body 2 with the flange 1 is placed on the receiving jig 21, and then, when the support member 13 is lowered together with the spindle 12 which is driven in one direction by the motor 11, the cylinder body 2 is placed on the receiving jig 21. Due to the contact between the ball portion 20 that fits into the body 2 and the inner peripheral surface of the cylindrical body 2, the contact surface is finished into a mirror surface,
Next, a spherical portion 20 is placed at the interface between the flange 1 and the cylinder 2.
When the ball a reaches the ball part 20, the boundary part is formed into an arcuate surface part 3 that closely contacts a part of the outer periphery of the ball a, and is finished to a mirror surface.

〔effect〕

As described above, by using the molding apparatus according to this invention, it is possible to mold an arcuate surface portion extremely simply and easily, and to significantly reduce costs.

In addition, since the ball part has a mirror finish, it is possible to eliminate problems such as scratches on the ball and malfunctions.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of a molding device according to this invention, and FIG. 2 is an enlarged longitudinal sectional front view showing the main parts of the same.
FIG. 3 is a longitudinal sectional front view of the ball receiver before processing the arcuate surface portion, and FIG. 4 is a longitudinal sectional front view of the ball receiver after processing the arcuate surface portion. 11...Motor, 12...Spindle, 13
... Support member, 14 ... Column, 15 ... Cylinder, 16 ... Piston shaft, 19 ... Rotating shaft, 20
...Ball club.

Claims (1)

[Scope of utility model registration request] A support member is provided at the lower end of a spindle that is rotated by a motor and moves up and down in an appropriate manner, and a plurality of rotating shafts run parallel to each other within the support member at a uniform predetermined distance from the center of the lower surface of the support member. A molding device which is rotatably supported from the shaft to the upper end, and has a ball part for molding an arcuate surface part at the lower end of each rotating shaft.