JPH0226605Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field of the invention The invention relates to a bed that collects lubricating oil from the sliding guideway of a machine tool, and in particular separates cutting fluid mixed in the lubricating oil from the lubricating oil, and collects only the lubricating oil. Pertains to the means for collection.

BACKGROUND ART Lubricating oil is used on the sliding guide surfaces of machine tools, and in order to collect it, an oil receiver is provided near the guide surface so as to surround it. On the other hand, cutting fluid is injected into the workpiece on the slide table, and in order to collect the cutting fluid, a cutting fluid cover is provided above the oil receiver so as to surround the workpiece. The collected cutting fluid is then returned to the machine tool and another cutting fluid tank for reuse.

Although the cutting position is strictly covered by the cutting fluid cover, the cutting conditions are complicated and it is difficult to avoid scattering of even a small amount of cutting fluid to the outside. Undesirably, the cutting fluid scatters and falls and gets mixed into the oil receiver below.

It would be good if the collected lubricating oil could be returned to the oil tank as is and reused, but as mentioned above, it is impossible to reuse it as lubricating oil because cutting fluid gets mixed in, and this lubricating oil and cutting fluid Even if you try to return the mixed lubricating oil to the cutting fluid tank and reuse it as cutting fluid, if the mixed lubricating oil is stored in a tank that stores a large amount of cutting fluid, there is a risk of contamination with foreign substances such as bacteria. As a result, problems such as decomposition progressing inside the tank occur.

For this reason, in the past, the mixed liquid of lubricating oil and cutting fluid collected from the oil receiver was disposed of as is. However, when this mixed fluid is discarded, the amount of cutting fluid collected into the cutting fluid tank decreases by the amount that is scattered and dropped, gradually leading to a shortage of cutting fluid, and its waste becomes a problem as a lubricant. I was getting used to it.

Therefore, the mixed liquid of lubricating oil and cutting fluid is collected in a tank separate from the machine tool, separated there, and the lubricating oil is returned to the oil tank and the cutting fluid is returned to the cutting fluid tank for reuse. This is also possible, but since it requires the use of a special device for separating the mixed liquid in addition to the machine tool, it is expensive and requires space for the separation device.
There were problems such as complicated piping work.

Purpose of the invention Therefore, the purpose of the present invention is to separate the mixed liquid of lubricating oil and cutting fluid collected from the oil receiver into the lubricating oil and cutting fluid using a separation means integrated into the bed. The separated lubricating oil and cutting fluid can be immediately collected from the bed into respective recovery tanks, and the lubricating oil and cutting fluid can be separated and reused with a compact structure.

Summary of the invention Therefore, the present invention is to install a separation tank integrally connected to a receiver provided around the sliding guide surface of the bed, and to temporarily transfer the mixed liquid such as lubricating oil and cutting fluid collected from the receiver to the tank. Inside this tank, the lubricating oil and cutting fluid are separated in advance by utilizing the difference in their specific gravity, and the lubricating oil and cutting fluid are immediately separated from the bed. The waste can be collected in tanks, etc.

Structure of the invention Hereinafter, the structure of the invention will be specifically explained based on an embodiment shown in FIGS. 1 and 2.

The bed 1 with a function of separating lubricating oil and cutting fluid according to the present invention includes a receiver 2 provided on the upper surface of the bed 1 and a tank 3 as main parts. The receiver 2 is of an open-top type and is provided around the slide guide surface 4 of the bed 1 of the machine tool, and is sloped low in the direction of the arrow through which the lubricating oil 5 and cutting fluid 6 flow.

The tank 3 is attached to the lowest position of the receiver 2, and is provided with a plate-shaped partition 7 inside. This partition 7 divides the inside of the tank 3 into two parts.
It is divided into two chambers 11 and 12, and they are communicated with each other through a communication hole 8 in the bottom portion thereof.
A recovery hole 9 for the lubricating oil 5 is formed on one side of the chamber 11, and a recovery hole 10 for the cutting fluid 6 is provided in the wall surface of the other chamber 12 at a position lower than the recovery hole 9. For each of these recovery holes 9 and 10, tanks 13 and 14 and a circulation pump 15,
16 are connected to each other.

The cutting fluid collected in the tank 14 is sent via a pump 16 to a cutting fluid tank 17 storing a large amount of cutting fluid, so that it can be reused.
The cutting fluid in the cutting fluid tank 17 is injected into the machining area of the workpiece W on the machine tool by the pump 18. The workpiece W is supported on a slide table 19 that slides along the slide guide surface 4 of the bed 2, and the workpiece W is surrounded so as to collect cutting fluid injected into the workpiece W and scattered.
A cutting fluid cover 20 is attached on the slide table 19. The collected cutting fluid is then returned to the cutting fluid tank 17 and reused. That is, the cutting fluid is circulated between the tank 17 and the machine tool.

action of invention Next, the effect will be explained.

During operation of the machine tool, the lubricating oil 5 on the slide guide surface 4 flows down from the slide guide surface 4 and is stored inside the receiver 2. On the other hand, although the machining position on the slide table 19 is surrounded by a strict cutting fluid cover 20, the cutting conditions are complicated, and the cutting fluid 6 may unexpectedly exceed the cutting fluid cover 20 and scatter and fall. It gets mixed into the lubricating oil 5 inside the slide guide surface 4 and the receiver 2. The mixed liquid of the lubricating oil 5 and the cutting fluid 6 is supplied to a tank 3 which is connected to the receiver 2.
Flows in the direction of the arrow along the slope of the bottom of tank 3.
flows into the interior of the chamber 11.

Here, since the specific gravity of the lubricating oil 5 is smaller than the specific gravity of the cutting fluid 6, the cutting fluid 6 is located below the chamber 11, passes through the communication hole 8, and flows into the interior of the chamber 12.
On the other hand, the lubricating oil 5 floats to the upper surface of the cutting fluid 6 inside the chamber 11 and is separated from the cutting fluid 6.

Here, as shown in FIG. 3, the specific gravity of the cutting fluid 6 and lubricating oil 5 is P1, P2, the height from the bottom of the recovery hole 9 is LO, and the height from the bottom of the recovery hole 10 is LO. The height is L1, and the height of the upper surface of the cutting oil 5 and the interface between the lubricating oil 5 and the cutting fluid 6 is
Assuming L2, the following formula holds true.

P1×L1=P2×L2+P1×(L0−L2) Since the specific gravity P1, P2 and the height L0, L1 are constants, the height L2 of the lubricating oil 5 is always constant. Therefore, even if the mixing ratio of the lubricating oil 5 and the cutting fluid 6 is indeterminate, the height of the lubricating oil 5 is always constant. When the lubricating oil 5 becomes larger than the position of the recovery hole 9, it flows out from the recovery hole 9 and is stored inside the tank 13. and,
The lubricating oil 5 inside this tank 13 is pumped 15
is supplied to the sliding guide surface 4 again. Similarly, the cutting fluid 6 flows out from the recovery hole 10, is stored inside the tank 14, is sent to the cutting fluid tank 17 again by the pump 16, and is supplied to the cutting position.

In addition to the cutting fluid 6, the liquid mixed into the lubricating oil 5 may be any liquid having a specific gravity different from that of the lubricating oil 5.
Other liquids may also be used.

Effects of the Invention In the present invention, a liquid such as a cutting fluid having a different specific gravity can be separated from lubricating oil in advance by a separation means provided integrally with the bed. The separated lubricating oil and cutting fluid can be immediately collected from the bed into their respective tanks, and the lubricating oil is circulated back to the sliding guideway, while the cutting fluid is returned to the cutting fluid storage tank. It becomes possible to reuse it. This solves the problem of waste of lubricating oil and cutting fluid, and since there is no need to install a separate device for separating the recovered lubricating oil from the machine tool, it is inexpensive and requires special installation space and installation. No work is required, and the compact structure allows for easy separation of lubricating oil and cutting fluid.

Furthermore, the inside of the tank is divided into chambers by forming a communication hole in the bottom part, and by utilizing the difference in specific gravity between the lubricating oil and the cutting fluid, the lubricating oil can be reliably separated into only one chamber. Moreover, since the water surface condition can always be maintained constant, the storage height of the lubricating oil is always maintained constant in one of the above chambers, and the amount exceeding that height is always flowed out to the collection hole, ensuring that Only lubricating oil is recovered. On the other hand, only the cutting fluid is reliably collected from the other chamber, and extremely strict liquid separation can be performed with a simple structure and without the need for special equipment.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the bed of the present invention, FIG. 2 is a circulation path diagram, and FIG. 3 is a vertical sectional view of the separation tank taken along the - line in FIG. 1. 1... machine tool bed, 2... receiver, 3...
Tank, 4...Sliding guide surface, 5...Lubricating oil, 6
... Cutting fluid, 7 ... Partition, 8 ... Communication hole, 9,
10... Recovery hole, 11, 12... Chamber, 13, 14
...Tank, 15,16...Pump.

Claims (1)

[Scope of utility model registration request] A top-opening receiver is provided around the sliding guide surface below the machining position of the machine tool, and a tank is integrally connected to this receiver, and a partition is provided inside this tank. The two chambers are communicated with each other through a communication hole at the bottom of the partition, and a lubricating oil recovery hole is formed in the receiving chamber, and a cutting fluid drain is formed in the other chamber at a position lower than the recovery hole. A machine tool bed characterized by forming a recovery hole.