JPS5946738B2 - Jikuukenadonokenmahouhout Sonosouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for polishing the inner surface of a bearing used in a small motor or the like.

Conventionally, one method of polishing the inner surface of a bearing, etc. is to insert a bearing b into a support pipe a as shown in Fig. 6, for example.
Firm it with pine resin and press it to hold it in place.
Wire c such as piano wire or tungsten wire is placed on the inner surface of bearing b.
Insert.

The wire c has a slightly different diameter between the tip and the end, and the outer surface is shaped like an aperture. Using a polishing liquid such as water or oil containing alumina or diamond powder, the wire c is polished by moving it forward and backward in the axial direction while rotating the support pipe a. With conventional methods such as C, workability is poor, the equipment is fragile, and the inner surface of the finished bearing forms a slight taper corresponding to the taper of wire C. When a bearing is used, there are drawbacks such as when the shaft is slightly tilted, the bearing is undesirable, such as bearing at a corner of the inner surface of the bearing, and is not desirable as a vN bearing. 15 Also, conventionally, a metal wire of an appropriate length is passed through the shaft hole of the part to be polished, and both ends of the metal wire are bent to prevent the part from falling off, and the part is stored in the tank of the tumbler together with the polishing agent. There are also 20 tumblers that rotate this tumbler (Japanese Unexamined Patent Publication No. 47-13791), but in this case, the polisher is unable to handle the parts to be polished located at both ends of the metal wire and the parts located in the center. A uniform D makes it easy for the metal wires to become entangled with each other.

An object of the present invention is to provide a method for polishing a bearing, etc., which has good workability, has a simple device, and can uniformly polish a bearing even if the shaft is tilted because the finished surface exhibits an olive shape. It is something.

An embodiment of the present invention will be described.

In the first and second figures, an example of internal polishing of the bearing 1 is shown. n First, a stainless steel wire 2 is inserted into the straight shaft hole 1a of 30 steel bearings 1, and both ends of the wire 2 are butted together by brazing. The wire rod is formed into a circular or red-shaped wire. In this case, the diameter of the shaft hole 1a of the bearing 1 is 350.31 m.
The diameter of the mN wire 2 is 0.26 to 0.27 mm,
The diameter of this wire ring is about 35 to 40 meters. Note that the wire 2 may be made of nickel silver or piano wire in addition to suanreth. Inside the pot 3, there is a parel media 4 with a diameter of about 3 mm, an abrasive compound 5 such as alumina, an abrasive liquid 6 such as water or light oil, and a bearing 1 supported by the wire rod 2 as described above.
・Pour in appropriate proportions and seal with a 7v lid. Rotation is applied to the pot 3 via a rotating roller 8 that is linked to a ball mill or a parallel machine (not shown). Rotation is applied for approximately 1 to 40 hours, and this rotation causes bearing 1 to
Polishing is performed by moving the wire rod 2 irregularly with respect to the looped wire rod 2. That is, during rotation, polishing pressure is applied from the outside of the bearing 1 by the parel media, and the wire 2 acts as a wrap, and the rolling and sliding motion of the abrasive 5 that has entered between the wire and the inner surface of the bearing 1. The inner surface is polished by In the bearing 1 polished in this manner, the surface 9 of the shaft hole has an olive shape as shown in FIG.

For this reason, even if the shaft is tilted, it can be evenly supported on the inner surface of the bearing, which is advantageous. In addition to the bearing, the example shown in FIG.
It was used for polishing. The bearing 12 is fixed to a support plate (not shown) at the tip 13, and a needle driving shaft is inserted and supported through a shaft hole 12a formed in the radial direction. Since the shaft hole 12a is drilled with a drill or the like, the inner surface is polished or deburred to make it smooth. The wire rod 2 shown in FIG. 1 is inserted into the shaft hole 12a1tc of the bearing 12, and polished in the same manner using the above-described apparatus. According to the present invention having the above configuration, since the parts to be polished are held by the ring-shaped wire rod having a circular shape or a shape close to this, the shaft holes of all the parts to be polished are polished from a straight shape to an olive shape. Because the wire is ring-shaped, the part to be polished is polished evenly, and the inner diameter of the shaft hole of the part to be polished is polished very well, increasing its utility as a precision bearing and reducing the entanglement of the wires. It has excellent effects such as good workability, good surface finish on the inner surface of the shaft hole, and the ability to always perform a good bearing even when the bearing is tilted.

[Brief explanation of the drawing]

1 to 4 show examples of the present invention, in which FIG. 1 is a sectional view of the main part of the device, FIG. 2 is an enlarged sectional view for explaining the polishing state, and FIG. 3 is a polished bearing. FIG. 4 is an enlarged sectional view showing another bearing to be polished, and FIG. 5 is a sectional view illustrating a conventional polishing method. 1, 12...Bearing, 1a, 12a...Shaft hole, 2...
・Wire rod, 3...Pot, 4...Parel media, 5
... Abrasive agent, 6... Polishing liquid, 8... Rotating roller.

Claims (1)

[Claims] 1. In a barrel polishing method in which a part to be polished is stored together with an abrasive in a barrel pot and the part to be polished is polished by rotating this barrel pot, a straight shaft hole formed in the part to be polished is used. A wire rod is inserted into the wire rod, and both ends of the wire rod are then joined together so that the wire rod forms a ring of a circular shape or a shape close to this.By rotating the barrel pot, the part to be polished is attached to the wire rod formed into the ring. A method for polishing a bearing, etc., characterized in that the shaft hole is polished into an olive shape by the irregular motion.