JP2553538B2 - Electrolytic polishing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electrolytic polishing apparatus capable of performing electrolytic polishing of a large number of works at the same time.

(Prior Art) An electrolytic polishing apparatus is used for polishing a workpiece having a shape that is difficult to mechanically polish such as a piping component. However, the conventional electrolytic polishing apparatus is for polishing the workpieces one by one. Since it is normal, many workpieces cannot be polished at the same time, and mass production is inferior. On the other hand, a method of improving mass productivity by energizing a large number of workpieces at the same time was considered, but it is not possible to make the energization amount to each workpiece uniform, so the finish of each workpiece is not uniform. In addition, when a pulse power source is used to obtain a good polishing finish, an extremely large capacity is required, which makes it difficult to manufacture the power source.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, and electrolytically polishes a large number of works simultaneously and uniformly without unnecessarily increasing the capacity of the power supply device. It was completed for the purpose of an electrolytic polishing device capable of

(Means for Solving Problems) In the present invention, a large number of electrodes are provided on the upper surface of the electrolytic solution supply box, and a power supply pressurizing unit that clamps a work piece close to each electrode is provided above each electrode. It can be raised and lowered,
By connecting each of the multiple output terminals provided on the pulse power supply and each power supply pressurizing unit, the pulses generated at predetermined intervals are sequentially distributed to the multiple output terminals by a switching circuit, and the electrodes are sequentially and repeatedly printed. It is characterized in that it is applied.

(Embodiment) Next, the present invention will be described in more detail with reference to the embodiment of the electrolytic polishing apparatus for polishing the inner surface of the work shown in the drawing. (1) is an electrolytic solution receiving tank having an electrolytic solution inside, (2) is An electrolytic solution supply box provided inside, (3) an electrode set table provided in large numbers on the upper surface of the electrolytic solution supply box (2),
Reference numeral (4) is a large number of electrodes which are held on the respective electrode set bases (3) and project on the electrolytic solution supply box (2) at the same height. As enlargedly shown in FIGS. 2 and 3, inside the electrolytic solution supply box (2), cavities (5) and (6) are formed in two steps, and a rectification section is provided between them. (7)
The electrolytic solution discharged from the circulation pump (8) shown in FIG. 1 flows into the upper cavity (5) from the lower cavity (6) through the rectifying section (7), Furthermore, the structure is such that it flows upward through the outer peripheral portion of the electrode (4) through the central hole (9) at the base of the electrode (4) as indicated by the arrow in FIG. (10) is an insulating seat provided on the upper surface of the electrode setting base (3), and when the work (30) having a hollow portion is set on the upper surface of this insulating seat (10), the electrode (4) causes the work (3) to move.
It is located in the center of the hollow part of 0). On the other hand, a power supply pressurizing unit (11) is provided above each electrode (4) so as to be movable up and down by a power supply pressurizing cylinder (12).
The power feeding pressurizing part (11) is attached to the tip of the piston rod (13) of the power feeding pressurizing cylinder (12) via an insulating connector (14), and the work (30) is insulated from the insulating seat (10) at its lower surface.
It has a role of pressing toward and fixing the work (30) and supplying a current for electrolytic polishing to the work (30).

In the present invention, as shown in FIG. 1, a pulse power source (16) having a large number of positive side output terminals (15) is used, and each of these output terminals (15) is supplied with each of the above-mentioned power supply terminals. It is connected to the pressure section (11) by a cord wire (17). The pulse power supply (16) has a function of sequentially distributing a pulse current generated at a constant time interval to a large number of output terminals (15) by a switching circuit. In the illustrated embodiment, the pulse power supply (16) is supplied to the first output terminal (15). When the first pulse is output, then the second pulse is output to the second output terminal (15), and the fifth pulse is output to the fifth output terminal (15) as well, the first pulse is output again. The sixth pulse is output to the output terminal (15), and thereafter, the pulse is repeatedly output in the same manner. The output terminal (18) on the negative side of the pulse power supply (16) is connected to the electrolytic solution supply box (2) via the cord wire (19) and is connected to the electrode (4) via the electrode set base (3). It is conducted.

(Function) In the structure thus configured, the work (30) is set around each of the plurality of electrodes (4) projectingly provided on the upper surface of the electrolytic solution supply box (2), and the power supply pressurizing cylinder (12) is set. ) Lowers the power supply pressurization unit (11) to lower the work (3
0) is clamped. In this state, the circulation pump (8) is operated to flow the electrolytic solution from the inside of the electrolytic solution supply box (2) into the gap between the electrode (4) and the work (30), and the pulse generated from the pulse power supply (16) is applied. A built-in switching circuit sequentially distributes to a large number of output terminals (15) and repeatedly applies a pulse current to each electrode (4). Electrolytic polishing with a pulsed current can stabilize the system during the rest period of the current, and therefore can give an extremely large current density compared to the case where a steady current is applied.
The work (30) set around the workpiece is efficiently electrolytically polished by the pulse current repeatedly applied. Moreover, even when a large number of electrodes (4) are installed and a large number of workpieces (30) are simultaneously electropolished, the pulse current is applied repeatedly to the individual electrodes (4) one after another, as in the conventional case. Since it is not applied to a large number of electrodes (4) at the same time, the amount of electricity supplied to each work is uniform, the finish is uniform, and the capacity of the power supply device is increased in proportion to the number of electrodes. There is no need, and the power supply device can be easily manufactured.

Although the above-described embodiment is for electrolytic polishing the inner surface of the work, it is needless to say that it can be applied to electrolytic polishing of the outer surface of the work by arranging the electrodes so as to correspond to the outer surface of the work.

(Effects of the Invention) As is apparent from the above description, the present invention is capable of electrolytically polishing the surfaces of many works simultaneously and uniformly without unnecessarily increasing the capacity of the power supply device. It is suitable for use in processes requiring mass productivity. Therefore, the present invention contributes significantly to the industry as an electrolytic polishing apparatus that solves the conventional problems.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part, and FIG. 3 is a cross-sectional view of the main part in a cross section orthogonal to FIG. (2): Electrolyte supply box (4): Electrode (11): Power supply pressurizing unit (15): Output terminal (16): Pulse power supply (30): Work piece

Claims (1)

(57) [Claims] 1. A large number of electrodes (4) are projected on the upper surface of an electrolyte solution supply box (2), and a work (30) is clamped above each electrode (4) close to each electrode (4). The power supply pressurizing section (11) is provided so as to be able to move up and down, and the power supply pressurizing section (11) is connected to each of the multiple output terminals (15) provided in the pulse power supply (16) at predetermined intervals. An electrolytic polishing apparatus characterized in that a generated pulse is sequentially distributed to a large number of output terminals (15) by a switching circuit having a built-in pulse, and is repeatedly applied to each electrode.