JPH0547271B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for separating chips contained in a cutting or grinding fluid, which uses the magnetic force of a magnet to separate chips contained in a cutting or grinding fluid. It is.

Conventionally, there have been devices shown in FIGS. 3 and 4 as the above-mentioned type of chip separation device. This is cutting or grinding fluid (hereinafter simply referred to as cutting fluid).
A sewage tank 41 and a clarified liquid tank 42 are installed in the circulation path, a communication hole 43 is provided near the bottom of both tanks 41 and 42, and a magnetic plate 44 is provided at the bottom of the sewage tank 41. A sinking plate 45 is attached to the dirty liquid tank 41 to allow the liquid to flow into the purified liquid tank 42 from the communication hole 43 once it has been dug down to a predetermined depth, and each tank 4
1 and 42 respectively have scraper conveyors 46 and 4.
7.

Then, by supplying the cutting fluid, the cleaning fluid tank 4
When the liquid level 2 falls, the dirty liquid sinks into the plate 45.
and flows into the cleaning liquid tank 42 through the communication hole 43. Board 4 for dirty liquid to sink into
When the cutting fluid enters the inside of the cutting fluid, the chips contained in the cutting fluid are magnetically attracted to the magnetic plate 44, or the chips are magnetically attracted to the magnetic plate 44 due to natural sedimentation, and the chips are separated from the cutting fluid. Ru.

However, the communication hole 43 is provided near the bottom of both tanks 41 and 42 in order to effectively magnetize the chips when the dirty liquid enters the inside of the sink plate 45. There has been a problem in that the chips floating on the upper surface of the sewage do not sink into the sewage but remain suspended as they are.

Furthermore, the sewage in the sewage tank 41 is deep, and as is well known, the magnetic force of the magnetic plate 44 is inversely proportional to the square of the distance from its surface. Only. Therefore, chips in areas beyond the reach of the magnetic force of the magnetic plate 44 are magnetically attracted after waiting for natural settling, resulting in a problem that both chip separation accuracy and separation efficiency are poor.

In view of the above-mentioned problems, the present invention aims to improve both the separation accuracy and separation efficiency of chips in cutting fluid at once, and to efficiently remove chips floating on the surface of cutting fluid. It was done for a purpose.

The gist of this is that the cutting or grinding liquid that overflows from the waste liquid tank is placed between a waste liquid tank and a cleaning liquid tank provided in a circulation path for cutting or grinding liquid containing chips. An overflow channel for causing the liquid to flow into the purified liquid tank is provided horizontally at approximately the same height as the overflow outlet of the dirty liquid tank, and a magnetic plate is installed at the bottom of this overflow channel, and the cutting or installing a sinking plate vertically in the dirty liquid tank immediately before the overflow outlet for causing the chips floating on the upper surface of the grinding liquid to sink into the cutting or grinding liquid; This is a device for separating chips contained in cutting or grinding fluid, which is provided with a scraper conveyor for scraping off the chips magnetically attached to the magnetic plate.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

The chip separation device shown in Figures 1 and 2 is suitable for separating and removing chips contained in a cutting fluid with a relatively large circulating flow rate and chips floating on the surface of the cutting fluid. There is.

Cutting fluid containing chips used by several machine tools M is collected in one place and flows into a tank 2 in which a chip conveyor 1 is disposed. Relatively large chips settle at the bottom of the tank 2 and are separated and removed by the running chip conveyor 1.

The cutting fluid from which relatively large chips have been separated and removed is
It flows out from an outlet 3 provided in the tank 2 and flows into the dirty liquid tank 4. An overflow passage 6 is provided between the dirty liquid tank 4 and the purified liquid tank 5.

The overflow channel 6 is provided horizontally at a position where the cutting fluid containing chips in the dirty liquid tank 4 overflows, and a magnet plate 7 is installed at the bottom of the overflow channel 6.

The waste liquid tank 4 and the purification liquid tank 5 are each provided with scraper conveyors 8 and 9 for scraping off settled chips, and the overflow channel 6 is provided with scraper conveyors 8 and 9 for scraping off settled chips. A scraper conveyor 10 is provided for scraping.

Further, a dipping plate 11 is vertically installed immediately before the overflow outlet 14 in the dirty liquid tank 4 to cause the chips floating on the upper surface of the cutting liquid to sink into the liquid. In addition, 12
and 13 indicate partition plates provided in the dirty liquid tank 4 and the purified liquid tank 5, respectively.

When the cutting fluid containing chips flows into the dirty liquid tank 4 in an amount exceeding the storage capacity, a part of the cutting fluid containing chips flows out from the overflow outlet 14 into the overflow passage 6 and flows into the overflow passage. The liquid passes over the magnetic plate 7 placed at the bottom of the cleaning liquid tank 6 and flows into the cleaning liquid tank 5 from the overflow inlet 15.

Here, since the thickness of the cutting fluid containing chips passing over the magnetic plate 7 is small, the thickness of the cutting fluid passing over the magnetic plate 7 is small.
As a result, the magnetic attraction force of the chips increases, and the chips in the cutting fluid are intensively magnetically attracted to the magnetic plate 7 and separated. Furthermore, the fact that the thickness of the cutting fluid containing chips passing over the magnetic plate 7 is small means that the sedimentation time of the chips in this area is short. are efficiently separated. Furthermore, the chips are removed from the magnetic plate 7 within the range of the hole magnetic force.
Since the particles are intensively magnetized and separated, it is possible to separate fine chips generated during grinding.

In addition, since the sink plate 11 is installed just before the overflow outlet 14 in the waste liquid tank 4, the floating chips are removed from the liquid by the fast flow generated near the overflow outlet 14 during overflow. The object is forcibly submerged into the object, and is reliably magnetically attached to the magnetic plate 7 while attempting to float up again.

Note that if the floating chips overflow as they are and flow into the overflow channel 6, the magnetic force of the chips by the magnetic plate 7 in the overflow channel 6 is large as described above, so the chips will not float. Most of the chips present are magnetically attracted and hardly ever flow into the purification liquid tank 5.

Furthermore, because of the sinking plate 11, the flow of the cutting fluid on the magnetic plate 7 becomes a laminar flow with a uniform flow velocity without any turbulence, so that the magnetization of chips on the magnetic plate 7 is prevented. Since it becomes uniform, the filtration effect of chips becomes stable.

Therefore, the cutting fluid stored in the purifying fluid tank 5 contains almost no chips, and is supplied to the machine tool M again by the action of the pump P, and thereafter is circulated by repeating the same action.

As explained in detail above, in the device for separating chips contained in cutting fluid of the present invention, since the thickness of the cutting fluid containing chips passing through the overflow channel on the magnetic plate is small, The magnetic attraction force of the chips increases, and the chips in the cutting fluid are intensively attracted to the magnetic plate and separated. Furthermore, the fact that the thickness of the cutting fluid containing chips that passes over the magnetic plate is small means that the settling time of the chips in this area is short, and together with the above effect, the chips in the cutting fluid are efficiently Well separated.

In addition, since a sinking plate is installed just before the overflow outlet in the sewage tank, the chips floating on the top surface of the sewage are removed by the fast flow that occurs near the overflow outlet when the sewage overflows. It is forcibly submerged into the liquid, and is reliably magnetically attached to the magnetic plate on its way to the surface again.

Furthermore, because of the sinking plate, the flow of the cutting fluid on the magnetic plate becomes a laminar flow with a uniform flow velocity without any turbulence, so that the chips on the magnetic plate are magnetized uniformly. , the filtration effect of chips becomes stable.

As described above, according to the device for separating chips contained in cutting fluid of the present invention, both the separation accuracy and separation efficiency of chips contained in cutting fluid can be improved at once. Further, it becomes possible to separate fine chips generated by the grinding process. Furthermore, the chips floating on the surface of the cutting fluid can be efficiently removed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a chip separation device according to the present invention, FIG. 2 is a diagram showing a cutting fluid circulation path, FIG. 3 is a sectional view of a conventional chip separation device, and FIG. 4 is a sectional view of a conventional chip separation device. FIG. 4 is an enlarged sectional view taken along the line X-X in FIG. 3; (Explanation of symbols of main parts), 4... Sewage tank,
5... Purification liquid tank, 6... Overflow channel, 7... Magnetic plate, 10... Scraper conveyor, 11... Slip-in plate, 14... Overflow outlet, 15... Overflow inlet.

Claims (1)

[Claims] 1 Between the dirty liquid tank and the purification liquid tank provided in the circulation path of cutting or grinding liquid containing chips,
An overflow channel for causing the cutting or grinding fluid overflowing from the dirty liquid tank to flow into the purified liquid tank is provided horizontally at approximately the same height as the overflow outlet of the dirty liquid tank, and this overflow channel A magnetic plate is installed at the bottom of the sewage tank, and a sinking plate is placed in the dirty liquid tank to allow the chips floating on the upper surface of the cutting or grinding liquid to sink into the cutting or grinding liquid. Separation of chips contained in cutting or grinding fluid, characterized in that a scraper conveyor is provided vertically in front of the overflow outlet to scrape off the chips magnetically attached to the magnetic plate. Device.