JP2000061774A - Cutting liquid washing-off device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To wash off dirty cutting liquid containing large and small chips for a long period of time. SOLUTION: This device is furnished with a dirty tank 5 to store dirty cutting liquid containing large and small chips, a chip conveyor 2 to deliver the large chips from the dirty cutting liquid out of the dirty tank 5, a chip bucket 3 to store the large chips by receiving them from the chip conveyor 2, a line 16 for the dirty cutting liquid to deliver the dirty cutting liquid removed of the large chips and containing the small chips out of the dirty tank 5, a filtering device capable of filtering the dirty cutting liquid by receiving it from the line for the dirty cutting liquid and removing the chips attached on a filter 8 by back-flow and a clean tank 10 to store clean cutting liquid 21 filtered by the filtering device by receiving it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting fluid cleaning device for converting dirty cutting fluid used in machine tools and the like into clean cutting fluid.

[0002]

2. Description of the Related Art Conventionally, various types of cleaning devices for cleaning dirty cutting fluid containing large and small chips used in machine tools and the like to make clean cutting fluid are known.

[0003]

However, in the conventional cutting fluid cleaning device, once the filter used for cleaning causes clogging, it is necessary to replace the filter with a new one. Therefore, there is a drawback that replacement of the filter becomes complicated depending on the usage situation.

An object of the present invention is to provide a cutting fluid cleaning device which can extend a period of washing dirty cutting fluid containing large and small chips into a cutting fluid for a long period.

[0005]

The means for solving the problems of the present invention are as follows:
A dirty tank that contains dirty cutting fluid containing large and small chips, a chip conveyor that takes out large chips from the dirty cutting fluid and carries them out of the dirty tank, and a chip that receives and stores large chips from the chip conveyor. Receive the dirty cutting fluid from the bucket and the dirty cutting fluid line that carries the dirty cutting fluid that excludes large chips and contains small chips to the outside of the dirty tank and the line for dirty cutting fluid. Cutting fluid equipped with a filtration device configured to remove chips that cause clogging by backflow as well as filtration, and a clean tank that receives and stores the clean cutting fluid filtered by the filtration device. It is a cleaning device.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention can employ not only the above-described embodiment but also various other forms.

In a preferred embodiment of the present invention, the filtration device has a filter bucket that receives dirty cutting fluid from a dirty cutting fluid line, a filter provided inside the filter bucket, and a filter bucket that can be opened and closed. And a drive means for opening and closing the bottom cover. An example of the driving means is a cylinder. By operating it, the bottom lid is closed, the dirty cutting fluid is filtered by a filter, washed with clean cutting fluid, and the clean cutting fluid is supplied to the clean tank through the clean cutting fluid line. On the other hand, at a desired timing, the driving means is operated to open the bottom lid, and the cutting fluid is allowed to flow backward in the filter bucket to remove small chips adhering to the filter from the filter. And the cutting fluid together on the chip conveyor.

The preferred form of drive means used herein is a hydraulic cylinder. By operating this hydraulic cylinder, the bottom lid is opened and closed via the operating rod.

Another preferred form of the present invention is such that a jammer plate is interposed between the bottom lid provided at the bottom of the filter bucket and the chip conveyor so that the cutting fluid flowing down from the bottom lid toward the chip conveyor. Weaken the flow.

Further, another preferred form of the present invention is
A dirty wire type screen is provided in the dirty tank so that the dirty cutting fluid contained in the dirty tank is transported from the dirty tank to the filtering device after passing through the screen.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cutting fluid cleaning apparatus according to a preferred embodiment of the present invention will be described below with reference to the drawings.

Dirty cutting fluid containing large and small chips (that is, used cutting fluid) is fed into the dirty tank 5 through the feeding port 1. In the illustrated example, the dirty tank 5 is formed in the shape of an elongated box, and the charging port 1 is formed in the upper left part of FIG.

A lower portion 2A of the chip conveyor 2 lies horizontally in the range of about 4/5 of the dirty tank 5. An inclined portion 2B is formed at an angle of approximately 40 to 50 degrees from the right end portion of the horizontal portion 2A, and an end portion 2C is formed at the upper end thereof. In the chip conveyor 2, the conveyor belt circulates between the end portion 2C and the end portion 2D on the opposite side as viewed from the end portion 2C.

The chip bucket 3 is arranged diagonally below the end portion 2C of the chip conveyor 2. The chips discharged from the end portion 2C of the chip conveyor 2 are guided by the guide member 15 and enter the chip bucket 3.

On the other hand, a wedge wire type screen 4 is arranged almost all over the bottom of the dirty tank 5. The size of the eyes of this screen 4 is 100μ
It is ~ 300μ. The dirty cutting fluid introduced from the introduction port 1 passes through the lower portion 2A of the chip conveyor, is filtered by the screen 4, and reaches the bottom of the dirty tank 5. Therefore, the cutting fluid that has reached the bottom of the dirty tank 5 is a dirty cutting fluid containing only small chips. The large chips are carried out to the outside of the dirty tank 5 by the above-mentioned chip conveyor 2, guided by the guide member 15 and stored in the chip bucket 3.

The pump 6 is for supplying the dirty cutting fluid existing at the bottom of the dirty tank 5 into the filter bucket 7 through the dirty cutting fluid line 16.

Although various types of filter buckets 7 can be adopted, in the illustrated example, the filter bucket 7 is a container having an inverted truncated cone shape, and a cup-shaped filter 8 can be detachably attached to the inside thereof. It is located in. In this filter 8, only the cylindrical side portion has a filter function, and the disc-shaped bottom portion has a closed shape without small holes, and does not have a filter function. The filter functional portion on the side of the filter 7 has a mesh size of 10 to 30 μ.

A round through hole is formed at the bottom of the filter bucket 7, and a bottom lid 11 is provided therein so as to be openable and closable.

FIG. 2 shows a state in which the bottom opening of the filter bucket 7 is closed by the bottom lid 11.

At the center of the bottom lid 11, a lower end of an operating rod 18 extending from the cylinder 12 is fixed. The upper end of the operating rod 18 is fixed to the cylinder 12. The cylinder 12 is attached to the upper portion of the upper lid 17 of the filter bucket 7. The upper lid 17 has a shape in which the cup is turned upside down, the lower end has an open opening, and the outside in the middle thereof extends like a flange. The flange-shaped outer portion is joined to the upper edge of the filter bucket 7.

The cylinder 12 can be hydraulically driven, for example, and the actuation rod 18 can be driven by driving the cylinder 12.
Moves up and down, whereby the bottom lid 11 is opened and closed.

One end of the line 9 for clean cutting fluid is connected to the inside of the upper lid 17 of the filter bucket 7 described above, and the lower end of the line 9 is connected to the inside of the clean tank 10. The clean tank 10 is for containing a clean cutting fluid. This clean tank 10
Is provided with a pump 20, and by the action of the pump 20, a clean cutting fluid is supplied to a machine tool (not shown) as a cutting fluid.

The operation of the above-mentioned cleaning device will be described.

Dirty cutting fluid containing large and small chips
After being used in a machine tool or other cutting place, it is thrown into the dirty tank 5 through the charging port 1. The dirty cutting fluid arrives at the lower portion 2A of the chip conveyor 2, and by the action of the conveyor, large-sized chips are conveyed in the right direction of FIG.
From the point C along the guide member 15, insert the tip bucket 3
Be brought in.

Inside the dirty tank 5, the dirty cutting fluid passes through the wedge wire type screen 4 after the large-sized chips are carried out in the lower portion 2A of the chip conveyor 2 as described above, and further there. The dirty cutting fluid, which is subjected to a filtering action and finally contains only small-sized chips, reaches the bottom of the dirty tank 5. The dirty cutting fluid is supplied into the filter bucket 7 through the line 16 by the action of the pump 6.

Inside the filter bucket 7, the dirty cutting fluid containing small chips first passes through the filter function portion on the cylindrical side portion of the filter 8, and the upper lid 1
Clean tank 10 through line 7 and line 9
Supplied in.

Reference numeral 21 indicates a clean cutting fluid in the clean tank 10.

As described above, when the dirty cutting fluid is filtered by the filter 8, small chips will eventually adhere to the filter 8 and cause clogging. If the dirty cutting fluid is continuously filtered by the filter 8, small chips will eventually adhere to the outer periphery of the filter 8 and cause clogging.

In the present invention, the small chips thus attached to the filter 8 are removed as follows.

First, the cylinder 12 operates to open the bottom lid 11. As a result, the cutting fluid present inside the filter bucket 7 flows downward from the bottom opening of the filter bucket 7. In other words, the cutting fluid existing inside the filter bucket 7, including the clean cutting fluid existing inside the upper lid 17, flows downward from the bottom opening of the filter bucket 7. At that time, a backflow phenomenon occurs in the filter 8. That is, the clean cutting fluid flows from the inside of the filter 8 to the outside thereof, whereby the filter 8 is backwashed. The chips adhering to the filter 8 are removed from the filter 8 and discharged from the bottom opening of the filter bucket 7 together with the cutting fluid. As a result, the clogging phenomenon of the filter 8 is eliminated, and the filter 8 returns to the normal state again.

Then, the cylinder 12 is activated again,
The operating rod 18 is driven upwards so that the bottom lid 11 closes at the bottom opening of the filter bucket 7. Following that,
The dirty cutting fluid is again supplied from the bottom of the dirty tank 5 into the filter bucket 7 via the line 16 by the pump 16, and the filter 8 performs the filtering action as described above. Further, the clean cutting fluid is supplied from the position of the upper lid 17 into the clean tank 10 through the line 9.

As described above, according to the cleaning apparatus of the present invention, when the bottom lid 11 is opened, the clean cutting fluid inside the filter 8 simultaneously flows back through the cylindrical side portion of the filter 8 to the outside. It flushes away, washing away the small chips that have settled around the filter 8. As a result, the clogging of the filter is eliminated.

The timing for opening the bottom lid 11 by the cylinder 12 can be selected from the following (1) to (3).

(1) A timer (not shown) is set to open at regular intervals.

(2) The fluid pressure fed into the filter bucket 7 by the pump 6 is detected, and the cylinder 12 is operated to open the bottom lid 11 when a predetermined pressure is reached. When the filter 8 is excessively clogged, the hydraulic pressure in the line 16 becomes excessive, and thus such pressure detection can be performed.

(3) The clogging phenomenon of the filter 8 is detected by the change in the value of the current flowing through the pump 6, and the bottom cover 3
To open.

[0037]

According to the present invention, the large chips contained in the dirty cutting fluid are first removed by the chip conveyor 2, and the small chips contained in the dirty cutting fluid are removed by the filtration device. Moreover, even if the filtration device is clogged, it can be removed by backflow, so that a good cleaning condition can be maintained for a significantly long period of time as compared with the conventional cutting fluid cleaning device. In particular, when the filtration device has the configuration as described in claim 2, the effective period of the filtration action by the filtration device becomes extremely long, and the practical effect becomes remarkable.

[Brief description of drawings]

FIG. 1 is a plan view showing the outline of a cutting fluid cleaning device according to the present invention.

FIG. 2 is a side view schematically showing the cutting fluid cleaning device shown in FIG.

[Explanation of symbols]

1 input port 2 chip conveyor 3 chip bucket 4 Wedge wire type screen 5 dirty tanks 6 pumps 7 filter buckets 8 filters 9 Clean cutting fluid line 10 clean tank 11 Bottom lid 13 Jama Board 15 Guide member 16 Dirty cutting fluid line 20 pumps 21 Clean cutting fluid

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B23Q 11/00 B01D 29/04 530B 35/02 Z (72) Inventor Toyoichi Takebe Tode, Takaoka City, Toyama Prefecture Komyoji 1870 Address Kitamura Machinery Co., Ltd. F term (reference) 3C011 BB31 EE09 4D041 AA16 AB03 AC01 AD18 CA01 CB00 CC08 4D064 AA19 BK03 BK05 DC05

Claims (4)

[Claims] 1. A dirty tank for containing dirty cutting fluid containing large and small chips, a chip conveyor for taking out large chips from the dirty cutting fluid and carrying them out of the dirty tank, and a large chip from the chip conveyor. The tip bucket that receives and stores the dirty cutting fluid that contains small chips with large chips excluded,
A line for dirty cutting fluid to be carried out of the dirty tank and a dirty cutting fluid from the line for dirty cutting fluid that is passed through and filtered, and chips that cause clogging are removed by backflow. A cutting fluid cleaning device including a cleaning device and a clean tank that receives and stores the clean cutting fluid filtered by the filtering device. 2. A filter device in which a filtration device receives a dirty cutting fluid from a dirty cutting fluid line, a filter provided in the filter bucket, a bottom lid openably and closably provided at the bottom of the filter bucket, and It has a drive mechanism for opening and closing the bottom lid, and with the bottom lid closed, the dirty cutting fluid is filtered with a filter to make clean cutting fluid, and a clean cutting is performed in a clean tank through a line for clean cutting fluid. On the other hand, while supplying the liquid, the driving means is activated to open the bottom lid and the cutting liquid is caused to flow backward in the filter bucket, thereby removing the cutting chips adhering to the filter and cutting chips and cutting liquid. 2. A structure in which the chips are made to flow down together on a chip conveyor.
The cutting fluid cleaning device according to. 3. The force of the flow of the cutting fluid flowing down from the bottom cover toward the chip conveyor is weakened by interposing a jammer plate between the bottom cover provided at the bottom of the filter bucket and the chip conveyor. Or the cutting fluid cleaning device according to 2. 4. A dirty wire type screen is provided in the dirty tank, and the dirty cutting fluid contained in the dirty tank is conveyed from the dirty tank to the filtration device after passing through the screen. The cutting fluid cleaning apparatus according to any one of 3 above.