JPH05305519A - Working method for outer face of cylindrical workpiece - Google Patents

Abstract

PURPOSE:To provide a mirror face of which productivity is good, polishing and electrolytic action can be set at optimum, and quality is high and stable. CONSTITUTION:An electrode 6 having similar external face to the external face of a cylindrical workpiece 1 is opposed to the external face of the workpiece 1 keeping a decided gap, the cylindrical workpiece 1 is rotated by the drive force accompanying rotation of a polishing tool 3, and the external face of the cylindrical workpiece 1 is worked by composite action of polishing and electrolisis, by feeding the workpiece 1 in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for machining an outer surface of a cylindrical workpiece by combining mechanical polishing action and electrolytic action to mirror-finish the outer surface of the cylindrical workpiece.

[0002]

2. Description of the Related Art A conventional processing method of this kind is carried out by using a processing tool in which an abrasive for polishing and an electrode for electrolysis are integrated.

[0003]

In the above-mentioned conventional processing method, since the removal amount in the finishing region, that is, the polishing amount sharply decreases, a multi-step polishing process is required to obtain a mirror-finished surface. There is a problem of poor sex. In addition, since a composite tool in which an abrasive for polishing and an electrode for electrolysis are integrated is used, the polishing action and the electrolytic action are contradictory, and it is difficult to set the optimum conditions for both actions. is there.

In view of the above points, the present invention provides a method for machining the outer surface of a cylindrical workpiece, which has good productivity, can set the polishing action and the electrolytic action optimally, and can obtain a stable mirror surface of high quality. To aim.

[0005]

In order to solve the above-mentioned problems, the method for machining the outer surface of a cylindrical workpiece according to the present invention provides a predetermined concave electrode on the outer surface of the cylindrical workpiece, which is similar to the outer surface of the cylindrical workpiece. Face each other with a gap, supply electrolyte to the gap, connect the cylindrical work piece to the anode side and the electrode to the cathode side, and rotate the cylindrical work piece with the driving force that accompanies the rotation of the polishing tool. By sending an object in the axial direction, the polishing action and the electrolytic action are combined to process the outer surface of the cylindrical workpiece.

[0006]

According to the method for machining the outer surface of the cylindrical workpiece of the present invention having the above-described structure, the outer surface of the cylindrical workpiece is opposed to the concave electrode having a similar shape to the outer surface with a predetermined gap, and the polishing tool is rotated. While rotating the cylindrical workpiece with the driving force accompanying
Since the cylindrical workpiece is fed in the axial direction, the polishing tool for polishing and the electrode for electrolysis are separated separately, and the mechanical polishing action and electrolytic action are set independently to the optimum conditions. A high quality and stable mirror surface can be obtained.

[0007]

EXAMPLE One example will be described with reference to FIGS. Reference numeral 1 is a cylindrical workpiece, 2 is a supporting roller for supporting the cylindrical workpiece 1, and 3 is a polishing tool which is pressed against a part of the outer surface of the cylindrical workpiece 1 to polish the outer surface, such as a buff, a flap wheel, a grindstone, etc. The cylindrical work piece 1 is rotated by the driving force associated with the rotation. An energizing brush 4 is connected to the anode side of a direct current or an alternating voltage, is in sliding contact with the rotating shaft 5 of the supporting roller 2, and connects the cylindrical workpiece 1 to the anode side via the supporting roller 2. Reference numeral 6 denotes a concave electrode similar to the outer surface of the cylindrical workpiece 1, which is opposed to the outer surface of the cylindrical workpiece 1 with a predetermined gap and is connected to the DC or alternating voltage cathode side. Reference numeral 7 is a supply hole formed so as to penetrate the electrode 6, 8 is an electrolytic solution supplied to the gap through the supply hole 7,
9 is a storage tank for the electrolytic solution 8 and 10 is a supply hole 7 for the electrode 6 that sucks up the electrolytic solution 8 from the storage tank 9 and passes the electrolytic solution 8 through a filter 11.
Pump 12 for supplying to the cylindrical workpiece 1 and the polishing tool 3
The electrolytic solution recovery tank 13 is disposed below the electrolytic solution recovery tank 13 and the upper end thereof is connected to the bottom surface of the electrolytic solution recovery tank 12 and the lower end thereof is a recovery line of the electrolytic solution 8 located in the storage tank 9.

Next, a method of polishing the outer surface of the cylindrical workpiece will be described. The polishing tool 3 is pressed against the outer surface of the cylindrical workpiece by a pressing force F in the direction of the arrow in FIG. 1, and is rotated counterclockwise by a drive source (not shown). This rotation causes the cylindrical workpiece 1 to rotate clockwise. Then, a DC or AC voltage (3V to 15V) is applied between the electrode 6 and the brush 4, and an electrolytic current (0.2A / cm) is applied.
^{2 to} 10 A / cm ² ) and pump from the storage tank 9 to the pump 10,
The electrolytic solution 8 is supplied to the gap between the outer surface of the cylindrical workpiece 1 and the electrode 6 from the supply hole 7 of the electrode 6 via the filter 11.

Next, the cylindrical work 1 is reciprocally moved in one direction or reciprocally as shown in FIG. 2 by a feed mechanism (not shown), so that mechanical polishing action and electrolytic action alternately act in the rotational direction to form a cylindrical work. Electrolytic composite polishing of the outer surface of the article 1 is performed. The supplied electrolytic solution 8 is returned from the electrolytic solution recovery tank 12 to the storage tank 9 via the recovery line 13.

Next, another embodiment will be described with reference to FIG. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts. Reference numeral 14 denotes a grinding tool which is pressed against a part of the outer surface of the cylindrical workpiece 1 and grinds the outer surface. The grinding tool 14 has a large-diameter rotating body 15, a small-diameter rotating body 16 and a paper belt 17 bridged between the rotating bodies 15 and 16. Consists of.

Then, the small-diameter rotating body 16 of the grinding tool 14
Through the paper belt 17 and pressing force F in the direction of the arrow in FIG.
To press the outer surface of the cylindrical work piece 1 by pressure to rotate the paper belt 17 counterclockwise, and this rotation causes the cylindrical work piece 1 to rotate right. Thereafter, electrolytic composite grinding of the outer surface of the cylindrical workpiece 1 is performed in the same manner as in the above embodiment.

The rotation speed or speed of the polishing tool 3 or the grinding tool 14, the pressing force, the polishing or grinding oil agent, the water permeability of the tool material, the insulating property, the thickness, etc. can be selected by setting optimum conditions. Also, the area of the electrode 6 and the cylindrical work piece 1
With respect to the gap between the electrode 6 and the electrode 6, the electrolytic solution 8, the electrolytic voltage, the electrolytic current or the current density, the optimum conditions can be arbitrarily set and selected. In addition, the application area of the electrolytic current can be increased by a factor of 2 to 3 with respect to the same polishing material as compared with the conventional case.

[0013]

Since the present invention is configured as described above, it has the following effects. On the outer surface of the cylindrical work piece 1, a concave electrode 6 similar to the outer surface of the cylindrical work piece 1 is made to face each other with a predetermined gap, and an electrolytic solution 8 is supplied to the gap to make the cylindrical work piece 1 on the anode side. The electrode 6 is connected to the cathode side, and the cylindrical workpiece 1 is driven by the driving force accompanying the rotation of the polishing tool 3.
While rotating the, while sending the cylindrical workpiece 1 in the axial direction,
Since the outer surface of the cylindrical workpiece 1 is machined by combining the polishing action and the electrolytic action, the mechanical polishing action and the electrolytic action can be independently set to optimum conditions, and a high quality and high precision mirror surface can be obtained. The processing can be obtained with high productivity, and it has an outstanding effect that it can be applied as a mass production technology for the outer surface of a cylindrical workpiece.

[Brief description of drawings]

FIG. 1 is a partially cut front view of an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a partially cut front view of another embodiment of the present invention.

[Explanation of symbols]

 1 Cylindrical Workpiece 2 Support Roller 3 Polishing Tool 6 Electrode 8 Electrolyte 14 Grinding Tool

Claims (1)

[Claims] 1. A method for machining an outer surface of a cylindrical workpiece, wherein a cylindrical roller is supported by a supporting roller and the outer surface of the cylindrical workpiece is centerlessly machined. The outer surface of the cylindrical workpiece has a concave shape similar to the outer surface of the cylindrical workpiece. The electrodes are opposed to each other with a predetermined gap maintained, an electrolytic solution is supplied to the gap, the cylindrical workpiece is connected to the anode side and the electrode is connected to the cathode side, and the cylindrical workpiece is driven by the driving force accompanying the rotation of the polishing tool. A method for machining an outer surface of a cylindrical workpiece, which combines the polishing action and the electrolytic action to machine the outer surface of the cylindrical workpiece by rotating and simultaneously sending the cylindrical workpiece in the axial direction.