JPS5949132B2 - Electrolytic processing equipment - Google Patents

Description

Detailed Description of the Invention The present invention relates to an electrolytic machining device, and in particular, a machining electrode and a workpiece are opposed to each other in a machining tank through a pressurizing gap, and electricity is supplied while supplying an electrolytic solution to the machining gap. This relates to electrolytic processing equipment that performs processing, including the installation of electrodes for processing,
This was done to facilitate removal and positioning work, as well as repair work when the electrode is damaged.

In general, an electrolytic processing machine is a vertical machine in which the workpiece is fixed to a table movable in the X-Y directions, and the electrode is attached to the bottom surface of the spindle that is fed in the vertical direction and faces the workpiece. In order to prevent the machining fluid from scattering, machines are used that have electrodes and a machining tank that completely surrounds the workpiece.

Therefore, the processing tank is usually provided with a door that can be opened and closed on the front or side of the machine so that electrodes can be attached and detached and positioned. Due to this structure, the attachment/detachment and positioning of the electrodes must be subject to spatial constraints. Further, damage caused by a short circuit is often corrected with the electrode attached, and in this case, in addition to the above-mentioned spatial constraints, machining fluid adhering to the upper part of the machining tank drips, resulting in extremely poor workability. The present invention focuses on these points and aims to improve workability such as attachment/detachment, positioning, and correction work of electrodes. In an electrolytic machining device that processes electricity by supplying electrolyte to the machining gap while facing each other, the surface plate is fixed to the main shaft that moves the machining feed, and the surface plate is connected to the surface plate through a hinge mechanism at one end. At least 450 to 600 electrode mounting plates rotatably attached to the bottom of the surface plate in the direction of the processing tank door;
At least one of the four mutually orthogonal side surfaces of the electrode mounting plate is attached to two adjacent sides, respectively.
A reference plate for positioning the electrode, which is removably attached to the bottom surface of the electrode mounting plate so that the side surface is in contact with the reference plate, an electrode mounting jig that holds the processing electrode, which is installed on the side of the electrode mounting plate, and It is characterized by having a hook that engages with a pin installed on the side of the mounting jig.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. In the figure, 1 is not shown, but is a surface plate fixed to the main shaft that performs machining and feeding operations, 2 is an electrode mounting plate, 3 is an arm fixed to the electrode mounting plate 2, and 4 is an arm that passes through the arm 3. The arm 3 has a highly accurate fit and can rotate around a shaft 4 while maintaining positional accuracy.

Reference numeral 5 denotes a cylinder operated by hydraulic pressure or the like, one end of which is rotatably fixed to the surface plate 1 by a shaft 6, and the other end rotatably fixed to the arm 3 by a pin or the like.

Pins 7 are installed in four locations, two each on the front and back of the electrode mounting jig 17, and pins 8 are rotatably installed in four locations, two each on the front and back of the electrode mounting plate 2. The attached hook is formed in an L shape so as to hang on the pin 7.

9 is a reference plate fixed to the electrode mounting plate 2, and 10 is a threaded plate fixed to the electrode mounting plate 2 and has an internal thread.

11 is a bolt attached to the screw plate 10, 12 is a reference plate fixed to the electrode attachment plate 2, 13 is a screw plate fixed to the electrode attachment plate 2, and 14 is a bolt attached to the screw plate 10.

15 is a bearing fixed to the electrode mounting plate 2, and 16 is a bearing fixed to the surface plate 1, which rotatably supports the shaft 4, so that the electrode mounting plate 2 can be opened and closed around the shaft 4. It can be rotated to

17 is an electrode mounting jig, and 18 is a bolt for fixing the electrode mounting jig 17 to the electrode mounting plate 2.

Reference numeral 19 denotes an electrode, which is attached to the electrode attachment jig 17 with bolts or the like (not shown).

20 is a support fixed to the surface plate 1, 21 is a cylinder, 2
Reference numeral 2 denotes a pawl rotatably attached to the support 20, one end of which is rotatably connected to the cylinder 21, and the other end is sloped so that the surface facing the electrode mounting plate 2 tapers toward the tip. It has a wedge shape.

Note that two pawls 22 are provided as shown in FIG. 4. Therefore, by the operation of the cylinder 21, the pawl 22 can press the electrode mounting plate 2 against the surface plate 1, or can stand by in a place where it will not get in the way.

23 is a safety screw for fixing the hook 8 in a specific position.

In the above configuration, the operation will be explained below.

FIG. 5 is an explanatory diagram showing the state in which the electrode 19 is carried in. Although not shown, the main shaft is pulled upward to increase the distance between the surfaces, making it easier to carry the electrode 19 in. The cylinder 5 is extended and the electrode mounting plate 2 is pressed against the surface plate 1, while the cylinder 21 is also extended and the pawls 22 are tightening the electrode mounting plate 2 to the surface plate 1, performing a so-called clamping operation. The hook 8 is fitted with a screw 23 into a screw hole (not shown) formed in the electrode mounting plate 2 at a position where the hook 8 is in a horizontal position as shown in the figure.
It is fixed by screwing in. After the electrode 19 is attached to the electrode mounting jig 17 outside the processing tank, it is placed on a table 25 via a spacer 24 or the like using a crane or the like, and is transported by table feeding to a predetermined position inside the processing tank.

Next, lower the main shaft and attach the electrode mounting jig 17 and electrode mounting plate 2.
The distance between the two is approximately 5 to 15 m11. Next, loosen the screw 23 and hook the hook 8 onto the pin 7. At this time, the hooks 8 are in a nearly vertical position, and the screws 23 are again screwed into the screw holes (not shown) made in the electrode mounting plate 2 corresponding to this position, and the four hooks 8 on the front and back are tightened. Fix it. Therefore, a total of eight screw holes for fixing the hooks 8 are provided in the electrode mounting plate 2. by the way,
The optimal mounting positions for the pin 7 and the hook 8 are on the right and left sides of the electrode mounting plate 2, but when operating on the right side, it creates a blind spot for the operator and significantly deteriorates work efficiency. It is appropriate to install them on the front and back sides of 2, that is, on both the left and right sides from the operator's perspective. When the main shaft is raised in this manner, since the hook 8 is hooked on the pin 7, the electrode mounting jig 17 and the electrode 19 are raised together with the main shaft.

The electrode loading operation is completed by removing the spacer 24. Next, electrode positioning and fixing operations will be explained. When the cylinder 21 contracts, the pawl 22 comes off and becomes unclamped. Then, when the cylinder 5 is contracted, the electrode mounting plate 2 rotates about the shaft 4. Setting the rotation angle with respect to the surface plate 1 to 45 to 60 times or more is sufficient for subsequent operations. The state in which the electrode mounting plate 2 is tilted is shown in the sixth figure.
As shown in the figure.

Although the electrode mounting jig 17 and the electrode 19 move due to their own weight and come into contact with the reference plate 12, they do not fall because the hook 8 is hooked to the pin 7. The bolts 18 are temporarily tightened so that the gap between the electrode mounting jig 17 and the electrode mounting plate 2 is approximately 0.5 to 1 mm. Next, two-dimensional positioning is performed by tightening the bolts 11 and 14 and pressing the electrode mounting jig 17 against the reference plates 9 and 12.
So-called X-Y positioning is completed. Tighten bolt 18 completely. When the cylinder 5 extends again and the electrode mounting plate 2 rotates and comes into contact with the surface plate 1, the cylinder 21 extends and the pawl 22 strongly presses the electrode mounting plate 2 against the surface plate 1, resulting in a clamped state. Therefore, even if the function of the hydraulic power source deteriorates due to a power outage or the like, the wedge effect of the pawl 22 not only prevents it from falling, but also maintains positional accuracy. This completes all operations for attaching the electrode, and to remove it after the predetermined processing is completed, the operations described above can be reversed. Note that 26 is a processing tank, and 27 is a door that can be opened and closed on the side of the processing tank 26. The electrode mounting operation described above requires only the tightening or loosening of bolts by the operator. This can be done extremely easily. In addition, even if the electrode is damaged due to a short circuit phenomenon peculiar to electrolytic processing, it can be easily repaired from the door 27 by tilting the electrode mounting plate 2 so that the damaged part faces the operator. Since the work can be carried out from 12, there is no need for repositioning and it can be easily reattached, resulting in a significant reduction in working time and an improvement in the working environment. 7 and 8 are explanatory diagrams showing other embodiments of the electrode mounting jig 17, in which 171 is a movable plate movable along the dovetail groove of the electrode mounting jig 17, and 172 is a movable plate 171. This is a bolt to be fixed to the electrode mounting jig 17, and an oval hole (not shown) larger than the movement range is bored in the movable plate 171 for the bolt 172 so that the movement direction is the longitudinal direction.

Reference numeral 173 is a spigot part to which the electrode 19 is attached.

174 is a screw plate fixed to the electrode mounting jig 17, 175
is a bolt screwed into the movable plate 171 through the threaded plate 174, and by rotating the bolt 175, the movable plate 1
71 can be moved.

Needless to say, the bolt 172 is loosened at this time. 176 is a reference plate fixed to the electrode mounting jig 17, and 28 is a reference block for positioning which is inserted between the reference plate 176 and the movable plate 171 to adjust the center position of the spigot part 173 to a desired value. It is.

In short, in this example, the electrode mounting jig 17 of the previous example is used.
It has a structure that allows it to move in a direction perpendicular to the direction of movement of the main shaft. That is, a dovetail groove or the like is provided on the lower surface of the electrode mounting jig 17, and the movable plate 17 is movable along the dovetail groove.
1, the position of the electrode 19 can be finely adjusted and pitch processing can be performed extremely easily. In this embodiment, it is movable in only one direction, but it goes without saying that it can be movable in two directions perpendicular to each other. It goes without saying that the center position of the spigot part 173 can be adjusted by using a dial indicator or the like without using the reference block 28. FIG. 9 is an explanatory diagram showing the electrode mounting method when the electrode mounting jig 17 is not used.
Unlike the previous embodiment, the electrode 19 is provided with a pin 7.

29 is the standard block, 30 is the nut, 31 is the bolt,
A reference block 29 is fixed to the reference plate 12 by bolts 31 and nuts 30, and the position can be determined by replacing the reference block 29 in response to changes in the dimensions of the electrode 19.

As described above, in this embodiment, if the reference plate 12 for positioning is provided on the electrode mounting plate 2, the electrode 19 can be easily mounted. In the embodiment shown above, a cylinder is used as the power for rotating the electrode mounting plate 2, but it may be operated manually or by other power sources such as an electric motor. Furthermore, the shaft 4 is inclined with respect to the machining feed direction of the main shaft. Needless to say, it's fine.

In summary, the apparatus of the present invention is an electrolytic machining apparatus in which the machining electrode 19 and the workpiece are opposed to each other in the machining tank 26 through the machining gap, and the machining is performed by supplying an electrolytic solution to the machining gap while applying electricity. , the surface plate 1 is fixed to a main shaft that performs processing feed operation, and the surface plate 1 is rotatable in the direction of the door 27 of the processing tank 26 by at least 45 to 600 degrees with respect to the surface plate 1 via a hinge mechanism at one end. an electrode mounting plate 2 mounted on the lower part of the electrode mounting plate 2;
Reference plates 9 and 12 for positioning the individual electrodes, and an electrode attachment jig 1 that is detachably attached to the lower surface of the electrode attachment plate 2 so that its side surfaces are in contact with the reference plates 9 and 12, and that holds the processing electrode 19.
7. Electrode mounting jig 17 installed on the side of the electrode mounting plate 2
The machine is equipped with a hook 8 that engages with a pin 7 installed on the side of the main shaft, and is centered on a shaft fixed to a surface plate at the bottom of the main shaft, which processes and feeds an electrode mounting plate having a reference part for electrode mounting.
It has a structure that can be rotated to open and close, and the mounting surface can be oriented in a direction that is easy to work with, making it easy to perform electrode positioning operations such as centering and paralleling. Even when installing a machine, there is no need to support the weight of the electrode by input, or enter the narrow processing tank where the electrolyte falls and move it facing the ground. The electrode can be easily attached by simply moving it, and when repairing the electrode, the damaged part can be easily repaired from outside the door by facing the operator, especially for work that requires machining after removing the electrode. There is no need to remove the workpiece and repositioning is easy, and it has many effects such as reducing the number of man-hours, improving the working environment, reducing the operator's movements, especially reducing the required force, and improving the working direction.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figures 1 to 6 show an apparatus according to an embodiment of the present invention, in which Figure 1 is a front view, Figure 2 is a left side view of Figure 1, and Figure 3 is a left side view of Figure 1.
The figure is a right side view of Figure 1, Figure 4 is a top view of Figure 1, and Figure 5 is a top view of Figure 1.
6 is an explanatory diagram of the operation of this device, FIG. 7 is a front view showing another embodiment of the present invention, FIG. 8 is a sectional view taken along the line of FIG. 7, and FIG. The figure is a front view showing another embodiment of the invention. Note that the same reference numerals in the figures indicate the same or equivalent parts. 2 is an electrode mounting plate, 3 is an arm, 4 is a shaft, 9 is a reference plate, 1
0 is a screw plate, 11 is a bolt, 12 is a reference plate, 13 is a screw plate, 14 is a bolt, and 19 is an electrode.

Claims (1)

[Claims] 1. In an electrolytic machining device in which the machining electrode 19 and the workpiece are opposed to each other in the machining tank 26 through a machining gap, and the machining is performed by supplying electricity to the machining gap, a machining feed operation is performed. Surface plate 1 fixed to the main shaft, at least 45° to the surface plate 1 through a hinge mechanism at one end
An electrode mounting plate 2 is attached to the lower part of the surface plate 1 so as to be rotatable by 60 degrees or more in the direction of the door 27 of the processing tank 26, and two of the four mutually orthogonal side surfaces of the electrode mounting plate 2 are adjacent to each other. At least one positioning reference plate 9, 12 is attached to each side of the electrode mounting plate 2. At least one positioning reference plate 9, 12 is detachably attached to the lower surface of the electrode mounting plate 2 so that the side surface is in contact with the reference plate 9, 12. An electrolytic processing device comprising an electrode mounting jig 17 holding an electrode 19, and a hook 8 installed on the side surface of the electrode mounting plate 2 and engaging with a pin 7 installed on the side surface of the electrode mounting jig 17. .