JPH029532A - Rotary electrode type electrolytic polishing device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of unevenness in polishing and corrosion of a conductive brush and to improve polishing capacity by a method wherein a hollow conductive shaft is provided at its lower end with an electrode plate lined with a polishing pad, at its upper end with a rotary joint, and at its intermediate part with a rotation drive device and a feed device. CONSTITUTION:An electrode plate 13 lined with a polishing pad 14 is secured to the lower end of a conductive shaft 16, a rotary joint 29 connected to an electrolyte feed pipe 28 is connected to the upper end thereof, and a gear C is engaged with the intermediate part thereof two be rotated through a power transmission gear. Further, a conductive plate 19 making contact with a conductive brush 19 to effect a feed to the electrode plate 13 is provided. An electrolyte flows through the hollow shaft 16 by means of an electrolyte feed pipe 28 and is fed to the central part of the electrode plate 13, and the polishing pad 14 is normally filled therewith and held along with rotation of the electrode plate 13. Thus, a uniform electrolytic pickling function is maintained, pickling polishing capacity is improved, and unevenness in polishing is prevented from occurring. Since the conductive brush 18 is located away therefrom the brush is prevented from corrosion due to an electrolyte.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to surface polishing and passivation treatment of stainless steel plates, stainless steel craft steel, general steel plates and other metal plates, or pre-treatment for mild steel painting. This invention relates to a suitable electrolytic polishing apparatus for steel plates, etc.

<Prior Art> Conventionally, a belt grinder has generally been used to polish the surface of stainless steel and stainless steel clad steel plates after rolling thick plates, but it takes 2 to 3 hours per steel plate. Also,
Belt wear is severe, belt cost is high, and polishing
I! There were problems such as the polished surface becoming warped afterwards and requiring press correction.

Therefore, the applicant applied for a patent in 1988 for a polishing method that is highly efficient and can shorten the polishing time, generates almost no heat during polishing, and therefore does not cause width warping of the polished surface. This is proposed in No. 158169.

However, in the method proposed here, the electrolyte is supplied directly onto the metal plate, so the electrolyte cannot fill directly under the electrodes, which increases the conductive resistance between the electrodes and tends to cause uneven polishing. Ta. Furthermore, since power is supplied by bringing the conductive brush into direct contact with the side surface of the electrode, there are problems such as corrosion of the conductive brush.

<Problem II to be Solved by the Invention> An object of the present invention is to eliminate problems such as uneven polishing and corrosion of conductive brushes, and to improve the polishing process by W! It is an object of the present invention to provide a rotating electrode type electrolytic polishing device such as W4 Kari with improved performance.

Means for Solving the Problems> The present invention has an electrode plate lined with an abrasive pad at the lower end of a hollow conductive shaft, a rotary ridge connected to an electrolyte supply pipe at the upper end, and an electrode plate lined with an abrasive pad at the upper end thereof, and an electrode plate lined with an abrasive pad at the lower end of the hollow conductive shaft. This is a rotating electrode type electrolytic polishing apparatus characterized in that a rotary drive device for rotating the conductive shaft and a power supply device for supplying power to the conductive shaft are respectively disposed in the part.

For Kusaku First, the present invention will be explained in detail based on the drawings.

FIG. 1 is a sectional view of the polishing apparatus of the present invention, and FIGS. 2 and 3 are respectively shown in the tv! FIG. 3 is a cross-sectional view of J in the C arrow direction and the E arrow direction.

In FIG. 1, reference numeral 16 indicates a hollow conductive shaft. An electrode plate 13, which is etched with a polishing pad 14, is fixed to the lower end of the conductive shaft 16, while an electrolyte supply pipe 28 is connected to the upper end of the conductive shaft 16. A series of rotary joints 29 are rotatably connected. And in the middle part of this conductive shaft 16 is a conductive shaft! 6, in this case gear C
is fitted onto the conductive shaft I6, and is configured to be rotated by a rotation drive motor (also not shown) via a power transmission gear (not shown). Also, the conductive shaft 16
The electrode plate 1 is further inserted through the conductive shaft 16 into the middle part of the electrode plate 1.
An electrically conductive plate 19 is provided which contacts the electrically conductive brush 18 in this case. In this figure, 7
30 is a gear box, 30 is a sleeve, and 31 is a bearing.

In this example, the power supply device is disposed above the rotary drive device, but the power supply device may be placed upside down.

With this structure, the electrolytic solution is supplied from the electrolytic solution supply pipe 28 through the hollow shaft 16 to the center of the electrode plate 13, and is constantly kept filled in the polishing pad 14 as the electrode JIi 13 rotates. .

Therefore, a uniform electrolytic pickling function is maintained, and the pickling polishing wIF
, the force is increased and at the same time there is almost no occurrence of uneven polishing.

Further, since the power supply portion can be located at a location distant from the polishing head 9, the conductive brush 18 and the like can be protected from corrosion by the electrolyte.

Next, an example of an embodiment in which the present invention apparatus is applied to a polishing apparatus for steel plates, etc. will be described.

FIG. 4 is a plan view showing the overall configuration. - way, 5th
The figure is a side view of the polishing cart as seen from AA in FIG. 4, and FIG. 6 is an elevational view of the polishing cart as seen from BB in FIG. 4.

In Fig. 4, 1 indicates an electrolytically abrasive material such as a polishing plate;
A rail 2 is arranged along this electrolytically abrasive material, and a traveling carriage 3 runs on this rail 2.

Note that 4 is a traveling bogie drive device.

Furthermore, a polishing cart 5 is mounted on the traveling cart 3 and runs sideways on the traveling cart 3. In addition, 6 is riIFj! Trolley drive system! It is.

On this polishing cart 5, a polishing head 9 consisting of a polishing pad 14 lined with an electrode 13 is mounted on the electrode drive shaft 1.
6. A plurality of rows are arranged in a staggered manner via a distribution gear box 7 and a lifting cylinder 8.

The electrode heads constructed in this manner are arranged in a staggered manner in multiple rows, as shown in one example in FIG. Here, it is desirable that the direction of rotation of the polishing head including the electrode head is changed for each row as shown by the arrows in FIG. 7.
J shows the configuration of the power transmission gear in the distribution gear box 7 to give such rotation to the polishing heads arranged in a staggered manner in multiple rows.0 The number of rows is 2 in this example, but 3 It can also be more than one column. Here, a is a motor shaft gear, b is an electrode rotation gear, and C is an intermediate gear.

Further, it is necessary to press this electrode against the steel plate with a constant pressure of about 50 g/d, and a lifting cylinder 8 for pressing the polishing head is provided on the polishing cart 5.

Since the apparatus of the present invention is configured in this way, a large amount of heat is not generated, and therefore, no temporary distortion is generated, and electrolytic polishing using the puff and electrode can be achieved with high efficiency. Furthermore, in the present invention, the power transmission distribution gear can be mounted on a truck that is kept away from the corrosive atmosphere near the steel plate, so maintenance of the apparatus is easy.

Furthermore, FIG. 9 and FIG. 1O are a plan view and a side view showing another embodiment of the present invention. Following the electrolytic polishing device, a scraper 20 for removing the electrolytic solution after electrolytic polishing and a lift device 21 for the scraper 20 are provided on the traveling carriage, and a spray header 22 for cleaning the electrolytic solution and a brush for cleaning are provided. It is equipped with a roll 11.

Next, the electrolytic polishing operation using the apparatus of the present invention will be described.

That is, the electrodes 13 and polishing pads 14 are arranged in a staggered manner with respect to the steel plate 1, with the steel plate 1 as an anode and the electrode side as a cathode, through an electrolytic solution that is continuously supplied and held in the polishing pad 14. The polishing head 9 is rotated, and then the polishing cart 5 is run while the polishing head 9 is held at a constant pressure against the steel plate 1 by the lifting cylinder 8. First, the steel plate is polished in the width direction, and then the running cart 3 is run and a large amount of polishing is performed, and the polishing is performed sequentially.

When polishing is completed, a sludge-like electrolyte remains on the steel plate. Various cleaning methods can be used, but for example, in order to reduce the waste liquid processing load on subsequent equipment and to reduce the amount of waste liquid, the sludge-like waste liquid is first collected with the scraper 20, and then the sludge-like waste liquid is recovered by thin film electrolysis. It is desirable to use a spray header 22 and a brush roll 23 to clean the liquid.

<Effects of the Invention> According to the present invention, it is possible to significantly shorten polishing time, reduce polishing cost, and omit press correction after polishing without causing polishing unevenness. In addition, since the power supply part can be located away from the polishing head, there is no risk of the conductive brush being corroded by electrolyte etc. Also, as a pre-treatment for painting -aai steel plates, the electrolyte is used as sulfuric acid to form a film of iron sulfate. By doing so, oxidation of the painted surface from the steel plate side can be prevented, and the removability of the paint can be improved, that is, the service life can be extended.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the device of the present invention, Fig. 2 is a view taken in the direction of arrow C in Fig. 1, Fig. 3 is a view taken in the direction of arrow E in Fig. 1, and Fig. 4 is a view taken in the direction of arrow E in Fig. 1! The overall plan view of the camphor tree, Figure 5 is the AA view of Figure 4, a side view of the polishing cart, and Figure 6 is the BB view of Figure 4, an elevational view of the polishing truck, Figure 7
The figure is a configuration diagram of the electrode head as seen from E in FIG. 6, FIG. 8 is a configuration diagram of the power transmission gear as viewed from DD in FIG. 6, and FIG. 9 is a plan view of 1 implementation B and HA of the present invention. , FIG. 10 is a side view. 1... Steel plate, 2... Rail, 3...
Traveling bogie, 4... Traveling bogie drive device, 5...
Polishing cart, 6... Polishing cart drive device, 7...
・Distribution gear box, 8... Lifting cylinder, 9... Polishing head, 10
... Cover 11 ... Electrode rotation drive motor, 12 ... Fastening bolt (insulator), 13 ... IT value (H4 plate), 14 ... Polishing pad, 15 ... Insulating cover 16 ... Hollow conductive shaft, 17 ... Bracket, 18 ... Conductive brush, 19 ... 41 coat, 20 ... Scraper, 21 ... Scraper lifting device, 22 ... Spray header, 23... brush roll,
24... Lever 25... Brush roll tilting device, 26... Bracket, 27... Brush roll drive device, 28... Electrolyte supply pipe, 28'... Electrolyte supply pipe, 29. ...Rotary joint, 30...Sleeve, 31...Bearing.

Claims (1)

[Claims] At the lower end of the hollow conductive shaft, there is an electrode plate lined with an abrasive pad, at its upper end there is a rotary joint connected to the electrolyte supply pipe, and in the middle part there is a rotation drive device that rotates the conductive shaft, and at the upper end there is a rotary joint connected to the electrolyte supply pipe. A rotating electrode type electrolytic polishing device characterized in that power supply devices for supplying power to the shafts are arranged respectively.