JPH0586429U - Cylindrical workpiece inner surface compound polishing machine - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the abrasive material wears, a constant pressing force is always applied so that the polishing tool can be easily inserted without a dedicated guide. [Constitution] A conductive rotating shaft 2 having a fluid pressure supply hole 3 formed therein.
A disk-shaped electrode 4 attached to the end of the rotary shaft 2 and a plurality of fitting holes 5 formed on the circumferential surface of the electrode 4 at equal intervals.
And a communication hole 6 formed in the electrode 4 and communicating with the fluid pressure supply hole 3 and the fitting hole 5, and a diaphragm 7 attached to the fitting hole 5.
And an abrasive material 11 mounted on the upper surface of the diaphragm 7 and provided on the inner surface of the cylindrical workpiece 1 so as to be able to be pressed and released.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cylindrical workpiece inner surface composite polishing apparatus for polishing the inner surface of a cylindrical workpiece by a combination of a scraping action by an abrasive and an electrolytic action.

[0002]

[Prior Art]

 Electrolytic composite polishing combines the electrolytic action and the abrasive action of the abrasive to polish the metal surface with high precision.When applying this electrolytic composite polishing technique to the inner surface polishing of cylindrical workpieces, the abrasive The rubbing action by means requires applying a pressing force that presses the abrasive material against the surface to be polished, that is, the inner surface of the cylindrical work piece, and a spring is used as the method.

[0003]

[Problems to be solved by the device]

 When using the conventional spring, the pressing force of the spring decreases with wear of the abrasive in a limited place such as the inner surface of the cylindrical workpiece, and the desired polishing performance cannot be obtained. There is. Further, the spring generates a force by giving a predetermined deflection, and therefore, there is a problem that a dedicated insertion guide is required when the polishing tool is inserted into the inner surface of the cylindrical workpiece. ..

In consideration of the above points, the present invention can apply a constant pressing force to the abrasive material even if the abrasive material is worn, and can easily insert a polishing tool without a dedicated insertion guide. An object is to provide an inner surface composite polishing apparatus.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the cylindrical workpiece inner surface composite polishing apparatus of the present invention comprises a conductive rotary shaft having a fluid pressure supply hole, and a disk-shaped electrode attached to an end of the rotary shaft. A plurality of fitting holes formed at equal intervals on the circumferential surface of the electrode, a communication hole formed in the electrode and communicating with the fluid pressure supply hole and the fitting hole, and a diaphragm mounted in the fitting hole, It is equipped with a polishing material that is attached to the upper surface of the diaphragm and can be pressed against and removed from the inner surface of the cylindrical workpiece.

[0006]

[Action]

 In the cylindrical workpiece inner surface composite polishing apparatus of the present invention configured as described above, the polishing material is attached to the diaphragm, and the diaphragm receives the fluid pressure through the fluid pressure supply hole of the rotating shaft and the communication hole of the electrode. Since the abrasive is supplied and pressed against the inner surface of the cylindrical workpiece, the pressing force of the abrasive can be adjusted arbitrarily by adjusting the fluid pressure, and the constant pressing force can be obtained by increasing the fluid pressure as the abrasive wears. Can be given. Further, by reducing the fluid pressure, the polishing material is buried in the fitting hole of the electrode, and the polishing tool can be easily inserted into the cylindrical workpiece without using a dedicated insertion guide.

[0007]

【Example】

 One embodiment will be described with reference to FIGS. 1 to 3. Reference numeral 1 is a cylindrical workpiece, 2 is a conductive rotary shaft having a fluid pressure supply hole 3 formed therein, 4 is a disk-shaped electrode mounted by screwing on the tip of the rotary shaft 2, and 5 is a circumference of the electrode 4. Three fitting holes formed at equal intervals on the surface, 6 is a communication hole formed in the electrode 4 and communicating with the fluid pressure supply hole 3 and the fitting hole 5, and 7 is a mounting surface of the fitting hole 5. The diaphragm is attached to the seat 8 and is made of a flexible material such as rubber, and is tightly attached to the seat 8 with an adhesive or a screw so that air does not leak between the seat 8 and the seat 8.

Reference numeral 9 is a base plate mounted on the upper surface of the diaphragm 7, 10 is a mounting plate mounted on the upper surface of the base plate 9, 11 is an abrasive material such as a grindstone mounted on the mounting plate 10, and 12 is a mounting plate. Mounting claws formed on both sides of 10 and holding an abrasive 11 and 13, 14 are abrasive guide disks disposed on both sides of the electrode 4 and made of an insulating material such as plastic. The disk 13 is clamped by the step portion 15 of the rotary shaft 2 and the electrode 4, and the disk 14 on the tip side is attached to the electrode 4 by the screw 16 and guides the movement of the abrasive 11.

Reference numeral 17 is a DC power source for applying a voltage with the rotating shaft 2 on the cathode side and the cylindrical work piece 1 on the anode side, and 18 is an electrolytic solution supplied to the inner surface 1 of the cylindrical work piece.

Next, the operation will be described. When air is supplied to the fluid pressure supply hole 3 of the rotary shaft 2 from a separately provided fluid pressure supply source (not shown), the diaphragm 7 is moved to the diaphragm 7 of FIG. 2 by the fluid pressure through the communication hole 6 and the fitting hole 5. The abrasive 11 is pushed up in the direction of the arrow, and the abrasive 11 is guided by the abrasive guide disks 13 and 14 and pressed against the inner surface of the cylindrical workpiece 1. In this state, the rotating shaft 2 is rotated, the cathode side of the DC power supply 17 is connected to the rotating shaft 2, the anode side is connected to the cylindrical workpiece 1, and a voltage is applied to supply the electrolytic solution 18 to the inner surface of the cylindrical workpiece 1. Then, an electrolytic action is generated in the gap G between the electrode 4 and the inner surface of the cylindrical workpiece 1, and this electrolytic action and the scraping action by the abrasive 11 alternately act on the inner surface of the cylindrical workpiece 1. The inner surface of the is polished with high precision.

In the above embodiment, the case where the number of the abrasives 11 is three has been described, but the number of the abrasives 11 may be two or more. The fluid may be liquid as well as gas.

[0012]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. The abrasive material 11 is attached to the diaphragm 7, and the fluid pressure is supplied to the diaphragm 7 through the fluid pressure supply hole 3 of the rotary shaft 2 and the communication hole 6 of the electrode 4, so that the abrasive material 11 is attached to the cylindrical workpiece 1. Since it is pressed against the inner surface, the pressing force of the abrasive 11 can be adjusted arbitrarily by adjusting the fluid pressure, and a constant pressing force can always be applied by increasing the fluid pressure as the abrasive 11 wears. The inner surface of the work piece 1 can be polished and finished with high precision. Further, by reducing the fluid pressure, the abrasive 11 is buried in the fitting hole 5 of the electrode 4, and the polishing tool can be easily inserted into the cylindrical workpiece 1 without using a dedicated insertion guide.

[Brief description of drawings]

FIG. 1 is a cutaway side view of an embodiment of the present invention.

FIG. 2 is a cut front view of FIG.

FIG. 3 is an enlarged view of a part of another state of FIG.

[Explanation of symbols]

 1 Cylindrical Workpiece 2 Rotating Shaft 3 Fluid Pressure Supply Hole 4 Electrode 5 Fitting Hole 6 Communication Hole 7 Diaphragm 11 Abrasive Material

Claims (1)

[Scope of utility model registration request] 1. A conductive rotary shaft having a fluid pressure supply hole formed therein, a disk-shaped electrode mounted on an end of the rotary shaft, and formed at equal intervals on a circumferential surface of the electrode. Multiple fitting holes,
A communication hole formed in the electrode, which communicates with the fluid pressure supply hole and the fitting hole, a diaphragm mounted in the fitting hole, and a pressing member which is mounted on the upper surface of the diaphragm and pressed against the inner surface of the cylindrical workpiece. A cylindrical workpiece inner surface composite polishing device provided with a polishing material provided freely.