JPS5928739Y2 - Machining fluid conveyance device for electric processing machines - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric processing machine o) a machining fluid conveying device.

Electric processing machines generate sludge consisting of metal particles, carbon particles, and highly viscous polymer compounds during processing.

Therefore, the machining fluid used for electrical machining contains the above-mentioned sludge.

These sludges generally have an adverse effect on machining performance, and in order to circulate and use the machining fluid, they are removed with a filter device and used again for electrical machining.

Therefore, a machining fluid circulation pump and a filter device are installed in the machining fluid circulation system.

FIG. 1 shows the conventional machining fluid conveying device described above. When the machining fluid circulation pump 3 of this device is started, the suction port 8
However, since the suction port 8 is located near the bottom of the machining fluid tank 1, the above-mentioned sludge, especially metal sludge, is sucked in at the same time.

Therefore, not only does it shorten the life of the equipment used in the machining fluid circulation system, especially the machining fluid transfer pump 3, but it also has the disadvantage of accelerating clogging of the filter located near the suction port 8 and shortening its life. there were.

In order to solve these problems, although not shown in the drawings, for example, a dirty tank or a settling tank is installed in the processing liquid tank to take particular account of the settling of metal sludge. In this case, the machining fluid tank 1 becomes larger, and the amount of machining fluid used in the machining fluid circulation system also increases, which not only increases the cost, but also increases the installation area of the machine. there were.

The present invention includes a fixed pipe, one end of which is connected to the suction side of a machining fluid circulation pump of a machining fluid conveyance device, and the other end of which is provided near the bottom of the machining fluid tank, and one end of which is connected to the other end of the fixed pipe. A float is connected to the other end to follow the liquid level fluctuations in the machining fluid tank, but to prevent it from overturning, and the other end is a suction opening into the machining fluid in the machining fluid tank. It is characterized by having a movable pipe with a mouth.

FIG. 2 shows an embodiment of the machining fluid conveying device of the present invention, in which 1 is a machining fluid tank for storing machining fluid 2, and a machining fluid circulation pump 3 is attached to the upper part of the tank.

A rotary joint 6 is provided near the bottom of the machining fluid tank 1 to connect to the suction lever 4 of the circulation pump 3 described above, and a float 9 that floats depending on the height of the machining fluid level is connected to the suction pipe at the rotary joint 6. 7.

Note that a part of the above-mentioned suction pipe 7 is provided with a rotary joint 6 and a suction port 8 that communicates with the suction lobe.

Further, 5 is a machining fluid return pipe that returns from the electrical machining machine (not shown) after machining.

Since the present invention has the above structure, when the machining fluid circulation pump 3 is started with the machining fluid tank 1 filled with the machining fluid 2, the machining fluid 2 is sucked through the suction port 8.

For this reason, the machining fluid 2 is conveyed to the electrical processing machine side through the suction pipe 7, the rotary joint 6, and the suction lobe 4.

In this case, as the machining fluid 2 continues to be conveyed, the machining fluid level will drop; however, due to the rotary joint 6 and the float 9,
Since the suction port 8 is always held at a constant position relative to the processing liquid level, only the supernatant liquid is sucked in.

The height of the suction port 8 with respect to the processing liquid level is the height of the float 9.
A hole with a cap (not shown) is provided in the float 9, and the height can be adjusted by injecting the machining liquid 2 or other liquid into the float 9.

In the embodiment described above, the rotary joint 6 is used to float the float 9, but the same result can be obtained even if the flexible tube 10 is directly connected to the suction lobe 4 as shown in FIG.

As described above, according to the present invention, the machining fluid circulation pump 3
Since the float 9 is provided on the suction port side of the machining fluid 2, only the supernatant liquid is sucked in, thereby preventing metal sludge from entering the equipment used in the machining fluid circulation system. In particular, it has the effect of extending the life of the processing fluid circulation pump, and further extending the life of the filter due to clogging of the filter device.

Further, in the present invention, since there is no need to provide a sedimentation tank or the like in the machining fluid tank, the machining fluid tank becomes smaller and the cost becomes lower, and the installation area of the machine becomes smaller.

Furthermore, the present invention prevents the float from overturning and does not require a special mechanism to prevent the float from overturning.
This has the effect of simplifying the configuration.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional machining fluid conveying device;
FIG. 3 is a sectional view showing the machining fluid conveying device of the present invention. 6... Rotating joint, 7... Suction pipe,
8...Suction port, 9...Float, 10
······Flexible Tube.

Claims (1)

[Scope of utility model registration request] In a machining fluid conveying device in which a machining fluid circulation pump for circulating machining fluid between an energizing processing machine and a machining fluid tank is provided on the machining fluid tank, one end is connected to the suction side of the machining fluid circulation pump, and the other end is connected to the suction side of the machining fluid circulation pump. A fixed pipe is provided near the bottom of the machining liquid tank, and one end is connected to the other end of the fixed pipe, and the other end is connected to a fixed pipe that follows liquid level fluctuations in the machining liquid tank but does not overturn. 1. A machining fluid conveying device for an electric machining machine, characterized in that a float is connected to the movable pipe having a suction port opening into the machining fluid in the machining fluid tank at the other end thereof.