JPS62228366A - Method and machine for gyro polishing - Google Patents

Abstract

PURPOSE:To uniformly polish even an eccentric workpiece and enable rotation and revolution at desired speeds by supporting a workpiece obliquely to the center line of a polishing vessel, making said workpiece rotate and revolve in an abrasive, and separately interlocking a supporting shaft and a cylindrical bearing with motors. CONSTITUTION:An outer bearing 4 is fixed to the top of a liftable supporting table 2, a cylindrical bearing is rotatably installed longitudinally inside the outer bearing 4, and a supporting shaft 6 for a workpiece 5 is obliquely inserted into it and rotatably supported. A motor 19 for rotating the supporting shaft 6 is provided in parallel with the shaft 6 while a motor 28 for rotating the pulley 31 of the cylindrical bearing is longitudinally provided via the bracket 27 of the supporting table 2. Accordingly, since the workpiece 5 is supported obliquely to the center line of a polishing vessel 23 and made rotate and revolve in an abrasive, even an eccentric workpiece can be uniformly polished. Also, since the workpiece 5 is fixed to the supporting shaft 6 while the supporting shaft 6 and the cylindrical bearing are interlocked with separate motors, the workpiece 5 can be rotated and revolved at desired speeds.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a gyro polishing method and machine, and belongs to the industrial field related to gyro polishing.

(Prior Art) In the conventionally known gyro polishing, the workpiece axis was set perpendicular to the abrasive layer and rotated.

(Problems to be Solved by the Invention) In the conventional gyro polishing machine, the workpiece axis rotates on its own axis, but since it is supported by a support axis parallel to the center line of the rtll@tank, it does not rotate on its own axis. Utera equal rtll1g
'There were times when I couldn't do it.

For example, when polishing a workpiece such as a camshaft having an eccentric portion or a ring-shaped workpiece, there is a problem in that it is difficult for the abrasive material to contact the corners of the workpiece, resulting in uneven polishing.

(Means for solving the problem) However, in this invention, the workpiece support axis is held obliquely with respect to the center line of the polishing tank, and the workpiece is prevented from orbiting and rotating. This solved the problems of the conventional method.

That is, in this invention, the workpiece is rotated while being held obliquely to the center line of the polishing tank, and also rotated (rotated). t
I tried to polish it thoroughly. The angle between the center line of the polishing tank and the support shaft in a3 is 5 degrees to 45 degrees. Further, the direction of rotation of the workpiece is opposite to the direction of rotation of the polishing tank, and the rotation ratio thereof is 1:1 to 1 near. However, polishing is possible even when rotating in the same direction.

Further, in the polishing machine of the present invention, a cylindrical bearing is installed vertically and rotatably on a support stand installed in a machine frame, and a support shaft of a workpiece is obliquely inserted into the cylindrical bearing to support it rotatably, and the A workpiece gripping tool is provided at the lower end of the support shaft, a rotation interlocking device for a prime mover or a fixed gear is provided at the upper end, a rotation interlocking device for the prime mover is provided at the cylindrical bearing, and a gyro polishing machine is provided below the support base. It is constructed by installing a polishing tank.

In the above, the support stand is installed on the machine frame so that it can be raised and lowered,
For example, a hydraulic cylinder is used for raising and lowering. Further, the support shaft and the cylindrical bearing are rotated in a predetermined direction and at a predetermined rotation speed in conjunction with an independent prime mover or a fixed gear. Note that a known inverter is used to change the rotation speed.

The prime mover is a seven-wheel motor, and the motor is fixed to the upper plate of the support base, or the cylindrical bearing is fixed to the bracket of the pulley provided above.

(Operation of the Invention) That is, according to the present invention, since the workpiece is held obliquely and revolves and rotates on its own axis, the rtll polishing C1 comes into even contact with the corners of the eccentric workpiece. A cylindrical bearing was installed vertically on the support stand so that it could rotate freely, and the support shaft of the workpiece was inserted diagonally into the cylindrical bearing and supported rotatably, so that the support shaft of the workpiece could rotate at any rotational speed. Furthermore, since the support base can be raised and lowered freely, the workpiece can be raised and lowered without any trouble during rotation and revolution.

(Example 1) Embodiments of the invention will now be described with reference to the accompanying drawings.

The outer bearing 4 is placed on the support stand 2 installed so that it can be lowered to the machine frame 1.
is fixed, and a cylindrical bearing 3 is installed vertically and rotatably inside the outer bearing t4, and a support shaft 6 of a workpiece 5 is inserted diagonally through the cylindrical bearing 3 and supported rotatably. The support shaft 6
An inner shaft 8 is fitted inside the outer sleeve 7 so as to be slidable in the axial direction, and a pulley 9 is provided on the outer side of the upper end of the outer shaft 7.
A tapered portion 10 is formed on the inner side of the lower end. A flange 11 is formed at the upper end of the inner shaft 8, and a spring 12 is attached to the inner shaft 8 between the flange 11 and the upper end surface of the outer shaft 7. Furthermore, a cholera chuck 13 is provided inside the tapered portion 10. An upper plate 2a is fixed to the upper part of the support stand 2 in parallel to the support stand 2 via a column 14, and an end of a piston rod 16 of a fluid pressure cylinder 15 is fixed vertically to the upper plate 2a. The fluid pressure cylinder 15 is fixed upright to the upper frame 17 of the machine frame 1, and a lowering shaft 18 is installed vertically in the supporting table 2 with a guide lever, and the upper part of the simultaneous lowering shaft 18 is fixed to the upper frame 17 of the machine frame 1. penetrates through.

A pulley 31 is fixed to the upper end of the cylindrical bearing 3, and a support shaft 6 is connected to the pulley 31 via a bracket 38.
A motor 19 for rotating is installed parallel to the support shaft 6, and a pulley 20 is fixed to the shaft of the motor 19.
It is connected to the pulley 9 by a belt 37.

Further, a fluid pressure cylinder 21 is provided above the upper end surface of the inner shaft 8.
is fixed diagonally downward to the upper plate 2a, its rod 22 is on the same center line as the inner shaft 8, and the end of the rod 22 is on the inner shaft 8.
It faces the flange 11 of.

A polishing tank 23 is rotatably supported on a frame 24 below the support stand 2, and the frame 24 is fixed onto a u-stand 25 of the machine frame 1. The motor 26 is set δ.

In the above embodiment, when the vertically installed motor 28 (with a built-in speed reducer) is started via the shafts 1-27 of the support base 2, the cylindrical bearing 3 passes through its pulley 29 and bells 1-30.
Since the pulley 31 is rotated, the cylindrical bearing 3 rotates together with the support shaft 6 and the motor. Therefore, the workpiece 5 revolves around the distance 1 from the center line 32 of the cylindrical bearing 3 as a radius.

On the other hand, when the motor 19 is started, the pulley 20.
Since the outer shaft 7 rotates via the shaft 9 and the support shaft 6 rotates,
The workpiece 5 will rotate.

Therefore, in the abrasive material of the known gyro polisher, the workpiece revolves around its axis and is reliably polished.

When pressurized oil is supplied to the fluid pressure cylinder 21, the rod 22 protrudes as shown by the arrow 33 (Fig. 3) and slides the inner shaft 8 in the direction of the arrow 34. The collet chuck 13 attached to the lower end also moves in the same direction to release the workpiece 5. The workpiece 5 can therefore be replaced.

Further, in the embodiment described above, the case where there is one support shaft 16 is shown, but if this is used as a plurality of shafts, a plurality of workpieces can be machined at the same time.

(Example 2) Next, the example shown in FIG. 4 will be described. That is, in the first embodiment, the rotation speed and rotation direction of the support shaft 6 are determined by the motor 19.
In this embodiment, as shown in FIG. 4, a fixed gear 35 is installed on the upper plate 2a via a bracket 36, and the upper end of the fixed gear 35 and the outer shaft 7 It is made by meshing three gears installed in the Therefore, when the motor 28 is started, the support shaft 6 revolves around the fixed gear 35 and also rotates due to the meshing of the fixed gear 35 and the gear 39. With such a structure, the workpiece support shaft 6 can be rotated around its axis by using only one motor 28.

(Embodiment 3) In an embodiment not shown in FIG. 5, the fixed location of the motor 19 is changed from the first embodiment, and the gear V-35 of the second embodiment can be forcibly rotated. Therefore, the components other than one motor and the parts interlocked with the motor are the same as those of the previous embodiments.

The outer bearing 4 is placed on the support stand 2 that is installed in the machine frame 1 so that it can be raised and lowered.
is fixed, and a cylindrical bearing 3 is installed vertically and rotatably inside the outer bearing 4, and a support shaft 6 of a workpiece 5 is inserted diagonally through the cylindrical bearing 3 and supported rotatably. In the support shaft 6, an inner shaft 8 is fitted inside an outer shaft 7 so as to be slidable in the axial direction, and a gear 39 is provided on the outer side of the upper end of the outer shaft 7, and a tapered part is provided on the inner side of the lower end. A shaped portion 10 is formed.

A flange 11 is formed at the upper end of the inner shaft 8, and a spring 1 is attached to the inner shaft 8 between the flange 11 and the upper end surface of the outer shaft 7.
2 is playing. In addition, there is a
On the inside of the tapered part 10, a cholera I. An upper plate 2a is fixed to the upper part of the support stand 2 via a branch 14 in parallel with the support stand 2, and the upper plate 2a
The end of a screw rod 16 of a fluid pressure cylinder 15 is vertically fixed to a. The fluid pressure cylinder 15 is fixed upright to the upper frame 17 of the machine frame 1, and an elevating shaft 18 for guiding is installed upright on the support base 2, and the upper part of the elevating shaft 18 passes through the upper frame 17. There is. A pulley 31 is fixed to the upper end of the cylindrical bearing 3, and a belt 30 is attached between the pulley 31 and a pulley 29 of the motor 28 fixed to the bracket 1-27 of the support base 2. Further, the gear 39 at the upper end of the support shaft 6 is attached to the bracket 1- to the upper plate 2a.
42 and the tooth 1r140 fixed to the rotating shaft of the lζ motor 41 and meshing V. Further, above the upper end surface of the inner shaft 8, a fluid pressure cylinder 21 is obliquely fixed downward to the upper plate 2a, and its rod 22 is on the same center line as the inner shaft 8, and the end of the rod 22 is attached to the inner shaft 8. It faces the flange 11 of 8.

Below the support stand 2 is the frame 2.
The frame 24 is rotatably supported on the machine frame 1, and the frame 24 is fixed on the clouding platform 25 of the machine frame 1.

Regarding the operation of the above embodiment, the gear 40 of the motor 41
Since the operation is the same as in the second embodiment except that it rotates at an arbitrary rotational speed, the explanation thereof will be omitted.

(Effects of the Invention) According to this invention, the workpiece is supported obliquely with respect to the center line of the polishing tank, and the workpiece is rotated and revolved in the abrasive material, so that the workpiece is eccentric. Also has the effect of uniform polishing. In addition, the workpiece is fixed to a support shaft, and the support shaft is supported obliquely to a cylindrical bearing, and the support shaft and cylindrical bearing are separately linked to the prime mover, allowing the workpiece to rotate and revolve at any speed. There are benefits to be gained.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the invention, FIG. 2 is a side view, FIG. 3 is an enlarged partially cutaway front view, and FIG.
The figure is an enlarged front view with a part cut away of an embodiment in which the rotation motor is omitted, and FIG. 5 is an enlarged front view with a part cut away of the same embodiment.

Claims (1)

[Scope of Claims] 1. A gyroscopic polishing method characterized by rotating the workpiece while holding it obliquely with respect to the center line of the polishing tank and polishing it by rotating it. 2. The center line of the polishing tank and the workpiece The angle of the support shaft is 5 degrees to 4
5 degrees.Gyroscope polishing method 3 according to claim 1, wherein the workpiece is rotated in the opposite direction to the rotation direction of the polishing tank, and the rotation ratio is 1:1 to 1:7. Gyro polishing method described in Section 4: A cylindrical bearing is installed vertically and rotatably on a support stand installed in a machine frame, a support shaft of a workpiece is inserted obliquely into the cylindrical bearing and supported rotatably; A workpiece gripping tool is provided at the lower end of the shaft, a rotation interlocking device with the prime mover is provided at the upper end, a rotation interlocking device with the prime mover is provided on the cylindrical bearing, and a polishing device for the gyro polishing machine is provided below the support base. A gyro polishing machine 5 characterized in that a tank is installed therein. A gyro polishing machine 6 according to claim 4 in which a support stand is installed on the machine frame so as to be able to rise and fall freely.A support shaft is provided within an outer shaft to which rotational force is applied. The gyro polishing machine 7 according to claim 1, in which an inner shaft for gripping a workpiece is slidably inserted therein. The gyro polishing machine 8 according to claim 1. The gyro polishing machine 9 according to claim 4, wherein the prime mover is a motor, and the motor is fixed to a bracket or top plate fixed to a pulley with a cylindrical bearing. The gyro polishing machine according to claim 4, wherein the fixed gear is fixed to the lower end of the bracket projecting downward.