JPH0351065Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrolytic buffing apparatus that uses both electrolytic polishing and mechanical polishing (for example, buffing).

[Conventional technology and its problems]

In general, polishing by electrolytic polishing mainly aims at brightening by removing minute irregularities on the surface of the metal to be polished, and there is a limit to smoothing by removing relatively large irregularities, that is, "undulations." Therefore, when a high degree of smoothing is required, mechanical polishing is used before or at the same time as electrolytic polishing.

On the other hand, a method is known in which only the convex portions of a passivated oxide film formed on the uneven portions of the surface of the anodic polished metal due to electrolytic action are removed by buffing to make the surface more glossy.

As an apparatus for carrying out such electrolytic buffing method,
The following proposal is made in Japanese Unexamined Patent Publication No. 132893/1983. That is, a tool electrode having an electrolyte supply hole is placed at the lower end of a hollow rotating shaft for supplying an electrolyte to the surface of the metal to be polished, and a tool electrode is placed alternately with the tool electrode and attached to the lower surface of the tool electrode. An electrolytic buff polishing apparatus has been proposed in which a buff is connected to a buff via a spherical flexible joint having a sealing material on the surface.

According to this proposal, since it is a spherical flexible joint with a sealing material on the surface, the electrolyte supplied by the hollow rotating shaft will not leak, and the tool electrode will always be kept parallel to the metal surface to be polished. It is said that it is possible to maintain the

However, the following unresolved problems exist in an electrolytic buffing apparatus equipped with such a spherical universal joint. That is, 1) Friction between the spherical seat of the universal joint and the tool electrode mounting seat, and friction between the spherical seat and the sealing material act;
It is difficult to make the tool electrode smoothly follow the gradual change in inclination angle such as waviness on the surface of the metal to be polished. Furthermore, during such electrode buffing, stick slip may occur due to the relationship between static friction and dynamic friction. 2) Machining the spherical surface of a spherical universal joint is difficult and expensive, and it is difficult to maintain precision because of wear at the spherical contact area. 3) When the sealing material is worn out, it is difficult to replace it and maintenance is poor. 4) When dealing with undulations on the surface of the metal to be polished, unless the hollow rotating shaft is moved up and down, the surface of the metal to be polished and the tool electrode may get twisted together.
You may avoid contact.

[Means for solving problems]

Therefore, the present invention was devised to completely solve the problems of the conventional technology, and its gist is to provide a hollow rotating shaft capable of supplying electrolyte and a buff. Connecting a tool electrode plate with an abrasive material attached to the electrode surface on the lower surface thereof in such a manner that the electrolytic solution can be supplied to the electrode surface, and rotating the tool electrode plate to perform mechanical polishing with the abrasive material, In an electrolytic buff polishing apparatus that performs electrolytic polishing, the lower end side of the hollow rotating shaft and the periphery of the rotation center on the upper surface side of the tool electrode plate perpendicular to the hollow rotating shaft are interlocked and connected via an elastic connecting body. , an electrolytic buffing apparatus in which the lower end of the hollow rotating shaft and a liquid supply hole bored in the tool electrode plate and supplied to the electrode surface are connected by a flexible tube.

[Effect]

When a rotational force is applied to the hollow rotating shaft, the rotational force is transmitted through the elastic coupling body, and the tool electrode plate to which the abrasive material is attached rotates, and electrolytic polishing is performed at the same time as mechanical polishing, which mainly performs polishing. be exposed. During such polishing work, if the surface of the metal to be polished has a gentle inclination angle such as a waviness, the elastic connecting body is elastically deformed in the direction of the hollow rotating shaft, and the tool electrode plate is smoothly and , follows while being elastically biased, and brings the metal surface to be polished and the tool electrode into constant contact. Moreover, the electrolytic solution is supplied to the solution supply hole of the tool electrode plate by the flexible tube, and even if the tool electrode plate follows the above-mentioned direction and tilts, the electrolytic solution will not leak. The purpose of the present invention is achieved by such action, and in particular, since the abrasive material is freely elastically deformed in the direction of the hollow rotating shaft, so-called buffing and electrolytic machining, which are not emery polishing, can be performed well. .

〔Example〕

According to an embodiment of the configuration of the present invention shown in the attached drawings,
Explain in detail.

1 to 3 show a first embodiment of the invention, FIGS. 4 and 5 show a second embodiment of the invention, and FIGS. 6 to 8 show modifications of the invention. An example is shown.

In the first embodiment, the rotational force of the motor 1 is transmitted to the hollow rotating shaft 11 via the pulleys 2 and 8 and the belt 3.
is transmitted to. This hollow rotating shaft 11 is supplied with an electrolytic solution from a rotary joint 6, and is also supplied with electric power necessary for electrolysis by a power supply brush 9. A tool electrode plate 13 having an abrasive material 14 such as a buff affixed to its lower surface is attached to the lower end of the hollow rotary shaft 11 in order to mechanically polish the metal surface 4 to be polished and to cause an electrolytic action.

Here, in order to connect the tool electrode plate 13 to the hollow rotating shaft 11, a flange 11a is provided around the lower end of the hollow rotating shaft 11, and this flange 11a,
In other words, the outer peripheral side of the hollow rotating shaft 11 and the tool electrode plate 13
The periphery of the rotation center on the upper surface side of the holder is connected to the periphery of the rotation center by a plurality of radially extending leaf springs 12 (three in the figure). Therefore, the rotational force of the hollow rotating shaft 11 is transmitted to the tool electrode plate 13 by the stress in the width direction of the leaf spring 12, but the difference between the tool electrode plate 13 and the hollow rotating shaft 11 due to the inclination α of the metal surface 4 to be polished is The axial variation is
As shown in the third figure, the tool electrode plate 13 easily moves relative to the hollow rotating shaft 11 against the elasticity of the leaf spring 12.

In addition, the lower end of the hollow rotating shaft 11 and the tool electrode plate 13
A flexible tube 15 is connected to a liquid supply hole 16 drilled in the electrolytic solution, and the electrolytic solution is supplied to the tool electrode plate 13 while freely tilting the tool electrode plate 13 as shown in the third figure without leaking the electrolyte.

Note that power is supplied to the hollow rotating shaft 11 by the power supply brush 9, and when a leaf spring 12 is used as in this embodiment, the leaf spring 12 itself becomes a conductor.
It is conducted from the hollow rotating shaft 11 to the tool electrode plate 13. Further, 17 and 18 indicate bearings for the hollow rotating shaft 11.

As shown in FIG. 4, the second embodiment of the present invention differs from the first embodiment in that a doughnut-shaped rubber tube 19 is used instead of the leaf spring 12.
are using. Therefore, the flange 11a and the tool electrode plate 13 are connected by a lead wire 20 to conduct electric power.

Moreover, as shown in FIGS. 6 and 7, one modification of the present invention differs from the first embodiment in that there is a gap between the hollow rotating shaft 11 and the tool electrode plate 13.
A concentric intermediate ring 21 is interposed between them, and each of them is connected radially at two points on the circumference by pins 22 and 23. The flange 11a and the tool electrode plate 13 are connected on the upper side with a lead wire 20, and a sealing film 24 is attached on the lower side. In such a modification, the tool electrode plate 13 cannot move relative to the hollow rotating shaft 11, so it cannot smoothly follow the undulations of the metal surface 4 to be polished. However, the other problems of the prior art described above cannot be solved. It can be resolved.

Note that the tool electrode plate of the present invention is not limited to a plate, but may be box-shaped, and these are referred to as tool electrode plates.

[Effect of idea]

According to the present invention, the lower end side of the hollow rotating shaft and the area around the center of rotation on the upper surface side of the tool electrode plate which is perpendicular to the hollow rotating shaft and has an abrasive material such as a buff attached to the electrode surface on the lower surface. The rotational force is transmitted by connecting with an elastic connector, but it can be moved freely in the direction of the hollow rotating shaft depending on the inclination angle of the metal surface to be polished, so it can achieve a finish polishing with better gloss. Of course, only the tool electrode plate can smoothly follow gradual changes in the angle of inclination such as waviness on the surface of the metal to be polished, and there is no stick slip that occurs during polishing. The electrode plate does not come into contact with the electrode plate and is always in contact with the electrode plate, and there is no need to move the bearing that supports the hollow rotating shaft to follow the slope of the metal surface to be polished. Furthermore, the biasing of the elastic coupling body can provide a synergistic effect to mechanical polishing such as buffing, which processes only the surface layer of the metal to be polished, following the surface and shape of the metal. In addition, the lower end of the hollow rotating shaft,
Since the electrolyte is supplied through the flexible tube to the liquid supply hole provided on the tool electrode plate, even if only the tool electrode plate is tilted, the electrolyte is supplied without leaking, reducing wear. There is no need to use a sealing material that is harsh and difficult to maintain.

[Brief explanation of drawings]

Figures 1 to 3 show the first embodiment of the present invention, with Figure 1 being an overall sectional view and Figure 2 being A of Figure 1.
~A arrow direction view, FIG. 3 is a diagram showing the main parts in use, FIGS. 4 and 5 show the second embodiment of the present invention, and FIG.
The figure is a sectional view of the main part, Fig. 5 is a diagram of the main part in use, and Fig. 6 is a sectional view of the main part.
From the drawings, FIG. 8 shows a modification of the present invention, FIG. 6 is an overall sectional view, FIG. 7 is a view taken along arrows A to A in FIG. 6,
FIG. 8 is a diagram showing the main parts in use. 11... Hollow rotating shaft, 12... Leaf spring, 13...
...Tool electrode plate, 14...Abrasive material, 15...Flexible tube, 16...Liquid supply hole.

Claims (1)

[Claims for Utility Model Registration] A hollow rotary shaft capable of supplying an electrolytic solution, and a tool electrode plate having an abrasive material such as a buff attached to the electrode surface on the lower surface thereof, which is capable of supplying the electrolytic solution to the electrode surface. In an electrolytic buff polishing apparatus that performs electropolishing while rotating the tool electrode plate and mechanically polishing it with an abrasive material, the lower end side of the hollow rotating shaft and the tool electrode plate perpendicular to the hollow rotating shaft are provided. The periphery of the rotation center on the upper surface side is interlocked and connected via an elastic coupling body, and the lower end of the hollow rotation shaft is connected to a liquid supply hole drilled in the tool electrode plate and supplied to the electrode surface. Electrolytic buffing equipment connected with flexible tubes.