JPS6248421A - Electro-chemical machine - Google Patents

Abstract

PURPOSE:To maintain a perfect insulating property between a support arm and a piston rod for preventing electrolytic corrosion by mounting a positive electrode directly on the lower end of the piston rod of an air cylinder made of synthetic resin and a current supply terminal on the upper end. CONSTITUTION:To a support arm 16 provided on a device body 7 is fixed an air cylinder 20 made of resin. A metal piston rod 21 is mounted to slide in the direction shown by the arrow (a). A positive electrode 4 and a current supply terminal 6a are mounted respectively on the lower and upper ends of the piston rod 21. Thus, since the piston rod 21 is completely electrically insulated from the device body 7, electro-chemical corrosion does not proceed and the device can be used for a long period even if electrolyte splashes to be attached to the device body 7 in the electro-chemical process.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] This invention relates to an electrolytic processing apparatus for performing deburring or melting processing, and particularly to the RIA electrode structure on the movable side of the apparatus.

[Prior Art] As this type of electrolytic processing apparatus, one having the structure shown in FIGS. 3 and 4, for example, is known. First, Fig. 3 shows the principle of electrolytic deburring. 1 is a workpiece to be subjected to electrolytic deburring, and the workpiece is positioned and placed on a workpiece support 2. The support base 2 is fixedly attached on the cathode 3. A part 3a of the cathode is located close to the burr 1a of the workpiece 1, and the anode 4 is connected to the workpiece 1 to keep it energized. By supplying electricity to both electrodes 3.4 while flowing the electrolytic solution, the electrolytic solution is dissolved and the burr 1a is dissolved and removed. In this case, the machined workpiece 1 is placed on the workpiece support 2 in each case.
Since the anode 4 is placed on and taken out from the workpiece 1, it is necessary to bring the anode 4 into contact with and away from the workpiece 1 each time, and it becomes a movable electrode. Note that 6 is a power source, to which the anode 4 and cathode 3 are connected via terminals 6a and 6b.

An example of an apparatus that actually performs deburring using the above-mentioned principle is shown in FIG. The same device also has a third
The same parts as in the figures will be described using the same reference numerals. The workpiece 1 is placed on a workpiece support 2, and the workpiece support 2 is fixedly attached to the cathode 3. This cathode 3 is attached to a predetermined pedestal or device main body 71 via a suitable insulating material 8, and the work support 2, cathode 3, and insulating material 8 are surrounded by a wall so that the electrolyte for heating T does not scatter. It is surrounded by 9.

The anode 4 that contacts the workpiece 1 and supplies electricity is attached to a current-carrying plate 10, and the current-carrying plate is connected to the break plate 1.
1 and an insulating bushing 12 with several bolts 13 to a base 14 in an insulated state, and a spindle 15 is integrally attached to the base 14, and the spindle 15 stands up from the pedestal or the device main body 7. The base 1 is supported by a hook-shaped support arm 16 so as to be movable up and down.
The vertical movement of 4 is performed by an air cylinder 17 provided separately. That is, the air cylinder 17 is also connected to the support arm 1.
The piston rod 18 of the air cylinder 17 is installed through the support arm 16 so as to be parallel to the spindle 15, and its lower end is fixed to the base 14. moves vertically up and down, and the positive KA4 comes into contact with the workpiece 1 and moves away from it.

In this case, the part of the insulation assembly A to which the movable anode 4 is attached needs to be kept completely insulated from the main body of the electrolyzing device, so it has to have an extremely complicated structure. The reason for this is that electrolytic machining uses the positive 4@dissolution action, and in order to protect the equipment from electrolytic corrosion, the anode must be completely insulated from the equipment body, and the anode must be placed on the equipment body side. By placing a cathode,
Even if the electrolyte scatters and adheres to or comes into contact with the main body of the device, galvanic corrosion is less likely to proceed.

For these reasons, it is not only necessary to make the part of the insulation assembly A to which the positive electrode 4 is attached to a complicated structure, but also to move the positive electrode 4 up and down accurately. This requires a spindle 15, and furthermore, the structure is complicated.

In addition, since the terminal 6a for supplying power to the anode 4 is connected to the current carrying plate 1-10, it comes close to the workpiece 1 during electrolytic machining, causing electrolytic corrosion due to the scattering of the molten liquid. It also has the problem of being easy to use.

Problem 1 to be Solved by the Invention The present invention solves the problem of the prior art described above, in that a part of the anode insulation assembly had to have a complicated structure, and the terminal for supplying power to the anode was This is an attempt to solve the problem that they are susceptible to electrolytic corrosion and must be replaced frequently.

[Means for Solving the Problems] The present invention provides specific means for solving the above problems in an electrolytic processing apparatus in which a cathode is fixed to a main body of the apparatus and an anode is movably attached to a support arm. Provided is an electrolytic processing device, characterized in that the air cylinder is directly attached to the lower end of a piston rod of an air cylinder attached to a support arm, a power supply terminal is connected to the upper end of the piston rod, and the air cylinder is made of resin. Since the air cylinder is made of resin, complete insulation from the piston rod is maintained even when it is removed from the support arm, and the anode is directly attached to the lower end of the piston rod. Since the power supply terminal is also connected to the upper end of the piston rod, even if the electrolyte is splashed, it will not stick to the piston rod, so there is no need to worry about electrolytic corrosion.

[Example] Next, the electrolysis device of the present invention will be explained in more detail with reference to the illustrated example. In order to facilitate understanding, the same parts as in the conventional example will be described with the same reference numerals.

1 is a workpiece, 2 is a work support stand, and 3 is a cathode, which is fixed to the pedestal or the apparatus main body 7 via an insulating material 8. These are the same as the conventional example in that they are surrounded by a enclosure v9 to prevent the electrolyte from scattering.

The air cylinder 20S, which is attached to a support arm 16 that stands up on the device body 7, is also made of resin, and is fixed to the support arm 16 by appropriate means, so that the piston rod 21 can move up and down as shown by arrow a. Slides in the direction J: Attached to the sea urchin. This piston rod 21 is made of gold B, and has a positive mark on its lower end. 4i 4 is detachably attached, and a power supply terminal 6a is connected to the upper end. still,
22 and 23 are air pipes.

For example, the air cylinder used in the air cylinder has the structure shown in FIG. 2. In the figure, the piston rod 21 is supported by a resin piston 24, the upper end of the piston rod penetrates a resin head cover 25 and protrudes upward, and the lower end is supported by a resin rod cover 26 and a resin rosette. : It penetrates through the 1-in cover 27 and protrudes to the bottom. Therefore, the piston rod 21 itself is completely electrically insulated from the air cylinder 20, and the air cylinder 20 is connected to the support arm 1.
6 (=j), the support arm 16 and the piston rod 21 are maintained in a completely electrically insulated state.

Note that a power supply terminal 6b is also connected to the cathode 3.

[Function] In the electrolytic processing apparatus of the present invention having the above-described configuration, the workpiece 1 is positioned and placed on the workpiece support 2 in the same manner as in the past in order to perform deburring or melting processing. , 1A cylinder 20 is driven to bring the positive 14i4 into contact with the workpiece 1 so that it can be energized, and the electrolyte is caused to flow through the workpiece 1 from the cathode 3 side as indicated by the arrow, and energization is performed. Desired deburring or electrolysis can be carried out with this method.

In this case, the anode 4 is energized via the piston rod 21, but as mentioned above, the piston rod is kept completely electrically insulated from the main body of the device, so the electrolyte is scattered during the electrolysis process. device main body 7 or support arm 16
Even if electrolyte adheres to the surface, electrolytic corrosion does not proceed easily, so the device itself can be used for a long period of time. Further, the anode 4 itself is subject to electrolytic corrosion as electrolyte adheres to it during each electrolysis process, but the power supply terminal 6a
t, tS'tf There is no adhesion of the solution, and even if the anode 4 is replaced, the terminals are rarely replaced.

[Effects of the Invention] As explained above, in the electrolytic processing apparatus according to the present invention, since the air cylinder is made of resin, it is completely electrically insulated from the metal piston rod. Even if this air cylinder is attached directly to the support arm, insulation is maintained between the piston rod and the support arm, so the anode can be bubbled directly to the lower end of the piston rod, and the power supply terminal can be connected to the upper end. Since the configuration allows power to be supplied via the piston rod, there is no need for a complicated insulating assembly as in the conventional example, and the configuration of the device is extremely simple. Since it is folded down, there is no wobbling in the contact position with the workpiece, and reliable machining can be performed, which has various excellent effects.

In addition, since the power supply terminal is connected to the upper end of the piston rod to which no electrolyte adheres, there is no problem with poor contact due to electrolytic corrosion (and there is no need to replace it, etc.). Also plays.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional side view of a part of the electrolytic processing apparatus according to the present invention, FIG. 2 is a cross-sectional view showing an example of an air cylinder used in the apparatus, and FIG. 3 is the same as the one shown in FIG. FIG. 4 is a cross-sectional view of a conventional example similar to the above, and FIG. 4 is a schematic top view showing the principle of electrolytic processing. 1... Workpiece 2... Work support stand 3.
...Cathode 4...Anode 5a, 5b...
・Terminal 7...Device body 8...Insulating material
9... Surrounding wall 16... Support arm 20
...Air cylinder 21...Piston rod

Claims (1)

[Claims] In an electrolytic processing device in which a cathode is fixed to the device body and an anode is movably attached to a support arm, the anode is attached directly to the lower end of a piston rod of an air cylinder attached to the support arm, and power is supplied to the upper end of the piston rod. An electrolytic processing device, characterized in that the air cylinder is made of resin.