JPH0451940Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a power supply device in an electrolytic buffing compound polishing device that combines the elution action of an anode by electrolysis and the buffing action to finish the surface of metal into a mirror finish.

(Prior art) Of the passivation oxide film on the minute unevenness formed on the surface of the object to be polished connected to the anode by electrolytic polishing, only the film on the convex parts is removed by buffing or using abrasive grains mixed in an electrolytic solution. As a so-called electrolytic buff compound polishing device, which mechanically removes the material by rubbing and concentrates the electrolyte on the convex portions of the surface of the object to be polished, greatly increasing the speed of electrolytic polishing and finishing the surface of the object to be polished to a mirror finish, 1978-
Those described in Japanese Patent Publication No. 146394 and Japanese Patent Publication No. 57-49118 are known.

(Problem to be solved by the invention) However, since the above-mentioned conventional technology does not directly supply power to the electrode plate, there is no contact between the energized materials (sleeve, rotating shaft, electrode support plate, tool electrode). There is resistance and there is a lot of voltage loss.

Electricity for electrolysis is supplied by placing a power supply brush against a thin sleeve that covers the rotating shaft of the electrode plate, so there are restrictions on the installation, size, and number of power supply brushes, and large currents cannot be passed through.

Because the power supply brush is provided inside the housing,
There were problems such as lubricants such as grease adhering to the power supply brush, reducing power supply ability.

The object of the present invention is to provide a power supply device for electrolytic buffing and composite polishing that can solve these problems.

(Means for Solving the Problems) In order to achieve the above object, the power supply device for composite polishing of the present invention includes a housing 2 of a polishing device main body 1.
A hollow rotating shaft 3 passing through the housing 2 vertically is rotatably supported by a bearing 4, and a center portion of a disc-shaped electrode plate 8 is attached to the lower end of the hollow rotating shaft 3 protruding from the lower surface of the housing 2. An abrasive material 9 is pasted on the lower surface of this electrode plate 8, and a liquid reservoir 11 provided between the abrasive material 9 and the electrode plate 8 is placed between the hollow inner hole 7 of the hollow rotary shaft 3 and the center of the electrode plate 8. In an electrolytic buffing composite polishing device configured to supply an electrolytic solution through a provided through hole 10 and having a power supply brush 18 pressed against the electrode plate 8, an insulating member is provided between the bearing 4 of the hollow rotating shaft 3 and the housing 2. 5 or an insulating plate 21 between the hollow rotating shaft 3 and the electrode plate 8.
The power supply brush 18 is arranged in a brush holder 16 attached to the outer circumferential surface of the housing 2 and is constantly pressed against the outer circumferential surface or the upper surface of the outer circumferential part of the electrode plate 8. .

(Function) With the configuration described above, the power supply brush 18 constantly brings its tip surface into sliding contact with the entire outer peripheral surface or the upper surface of the outer peripheral portion of the electrode plate 8 to stably supply a predetermined amount of electrode current. At the same time, the supplied current is passed through the electrode plate without detouring through the insulating member 5 interposed between the bearing 4 of the hollow rotating shaft 3 and the housing 2, or the insulating plate 21 interposed between the hollow rotating shaft 3 and the electrode plate 8. 8
It flows directly between the material and the material to be polished, and uniform polishing can be achieved.

Further, since the housing 2 and the electrode plate 8 are insulated by the insulating member 5 or the insulating plate 21, electric shock to the human body is prevented, and current is prevented from flowing to the rotary drive unit. There is no risk of corrosion due to galvanic corrosion.

Further, as described above, the power supply brush 18 is mounted on the brush holder 16 attached to the outer peripheral surface of the housing 2, and its tip is pressed against the outer peripheral surface or the upper surface of the outer peripheral part of the electrode plate 8.
It is possible to increase the size and number of attachments, secure a large current, and increase electrolytic polishing capacity.

(Embodiments) Various embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows an example in which the present invention is applied to an electrolytic buffing composite polishing device that finishes the top surface of a flat plate to a mirror finish.
The main body 1 of the polishing apparatus includes a vertical rotation shaft 3 which vertically passes through a housing 2 and is supported by a bearing 4. This bearing 4 is further supported by an insulating member 5, thereby electrically insulating the rotating shaft 3 and the main body 1.

The rotary shaft 3 is a hollow shaft, and a rotary joint 6 is attached to the upper end of the outside of the housing 2, from which an electrolytic solution is supplied to the inner hole 7 of the rotary shaft. Further, the center portion of a disk-shaped electrode plate 8 is integrally attached to the lower end of the rotating shaft 3 protruding downward from the housing 2, and an abrasive material 9 is attached to the lower surface of this electrode plate 8. Rotating shaft inner hole 7
A through hole 10 communicating with the electrode plate 8 is passed through the axial center of the electrode plate 8, and is connected to a liquid reservoir 11 provided between the electrode plate 8 and the abrasive material 9.

Further, within the housing 2, the rotational force of a drive motor 12 such as an electric motor or an air motor is inputted to the rotating shaft 3 via bevel gears 13 and 14. In this case, one or both of the bevel gears 13 and 14 is made of an electrically insulating material so that the rotating shaft 3 and the drive motor 12 are electrically separated.

A brush holder 1 is mounted on the outer surface of the housing 2 at a position close to the electrode plate 8 via an insulating support rod 15.
6 is attached, and the force of the spring member 17 built into this brush holder 16 moves the power supply brush 18 to the electrode plate 8.
Always press it against the outer circumferential surface of the Reference numeral 19 denotes a power supply line that sends electrolytic power to the power supply brush 18.

In addition, the O used for the joint part between the rotating shaft 3 and the electrode plate 8
Ring 20 is for sealing the electrolyte.

In the above structure, during polishing, the rotating shaft 3 and the electrode plate 8 are rotated by the drive motor 12 with the abrasive material 9 in contact with the upper surface of the flat plate, and
Power is supplied from the power supply brush 18 to the electrode plate 8, and on the other hand, power is supplied from the rotary joint 6 to the liquid reservoir 11 through the rotary shaft inner hole 7 and the through hole 10. Then, the electrolytic solution is eluted from this liquid reservoir 11 to the abrasive material 9. For this purpose, the abrasive material 9 is made from a non-woven fabric, and abrasive grains are used to polish the flat plate, and an electric current is passed through the non-woven fabric using an electrolytic solution as a medium, resulting in a combined action of electrolytic and mechanical polishing. Electrolytic buff composite polishing is performed.

In FIG. 1, the power supply brush 18 is pressed against the outer peripheral surface of the electrode plate 8, but as shown in FIGS. You may also attach it.

In addition, in FIG. 1, the bearing 4 is supported by an insulating member 5 in order to insulate the rotating shaft 3 and the housing 2, but as shown in FIGS. 3 and 4, the rotating shaft 3 and the electrode plate 8 are An insulating plate 21 may be interposed between them, and in this case, insulation is easier than in FIG. 1.

FIG. 5 shows a modified drive system for the electrode plate 8, in which the rotational force of the motor 22 is input to the rotating shaft 3 using pulleys 23, 24 and a belt 25. Reference numeral 5 indicates an insulating member, and similarly to the modified examples shown in FIGS. 2 to 4, the drive system shown in FIG. Of course, changes can be made as shown in FIGS. 8 through 8.

(Effect of the invention) As described above, according to the power supply device for electrolytic buffing composite polishing of the present invention, the center portion of the disc-shaped electrode plate 8 is attached to the lower end of the hollow rotating shaft 3 rotatably supported by the housing 2. When the abrasive material 9 is attached to the lower surface of the electrode plate 8, the hollow inner hole 7 of the hollow rotary shaft 3 and the electrode plate 8 are Since the electrolytic solution is configured to be supplied through the through hole 10 provided in the center, the electrolytic solution can be uniformly and quickly exuded over the entire surface of the abrasive material 9 through the liquid reservoir 11, and the power supply brush 1
8 is pressed against the outer circumferential surface or outer circumferential upper surface of the electrode plate 8, the size of the power feeding brush 18 can be increased and a large current can be passed. Since it is provided on the brush holder 16 attached to the outer circumferential surface, it is easy to attach, and it is also possible to attach a plurality of power supply brushes, increasing the electrolytic polishing ability. This prevents lubricants such as grease from adhering to the power supply brush 18, thereby stabilizing the power supply state.

Further, since the insulating member 5 is interposed between the bearing 4 of the hollow rotating shaft 3 and the housing 2, or the insulating plate 21 is interposed between the hollow rotating shaft 3 and the electrode plate 8,
The current supplied from the power supply brush 18 pressed against the outer peripheral surface or the upper surface of the outer peripheral portion of the electrode plate 8 flows directly and stably between the electrode plate 8 and the material to be polished without detouring, thereby uniformly polishing the surface to be polished. Can be processed.

Further, since the housing 2 and the electrode plate 8 are insulated by the insulating member 5 or the insulating plate 21, electric shock to the human body is prevented, and current is prevented from flowing to the rotary drive unit. This eliminates the risk of corrosion due to galvanic corrosion.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of an electrolytic buffing compound polishing device showing one embodiment of the present invention, Fig. 2 is a cross-sectional view of main parts showing another example of the power supply position, and Fig. 3 is a cross-sectional view of another example of the insulating position. FIG. 4 is a cross-sectional view of a main part combining the structure of FIGS. 2 and 3, FIG. 5 is a vertical cross-sectional view showing another example of the drive system, and FIGS. 6 to 8 are FIG. 6 is a sectional view showing a modification of FIG. 5; 1... Main body, 2... Housing, 3, 3a,
3b... Rotating shaft, 8, 8a... Electrode plate, 9, 9a
... Abrasive material, 16 ... Brush holder, 17 ... Spring member, 18 ... Power supply brush.

Claims (1)

[Scope of utility model registration request] A hollow rotating shaft 3 vertically penetrating through the housing 2 of the polishing apparatus body 1 is rotatably supported by a bearing 4, and a disc-shaped electrode plate is attached to the lower end of the hollow rotating shaft 3 protruding from the lower surface of the housing 2. Attach the center part of the electrode plate 8, and attach the abrasive material 9 to the bottom surface of the electrode plate 8.
At the same time, an electrolytic solution is supplied to a liquid reservoir 11 provided between the abrasive material 9 and the electrode plate 8 through the hollow inner hole 7 of the hollow rotating shaft 3 and the through hole 10 provided at the center of the electrode plate 8. In the electrolytic buffing composite polishing device configured as shown in FIG. An insulating plate 21 is interposed between the electrode plate 8 and the electrode plate 8, and the power supply brush 18 is disposed in a brush holder 16 attached to the outer circumferential surface of the housing 2 so that it is always on the outer circumferential surface or the upper surface of the outer circumferential part of the electrode plate 8. A power supply device for electrolytic buffing composite polishing characterized by pressing.