JPH08192331A - Cutting lubricant disposal device for machine tool - Google Patents

Abstract

PURPOSE: To provide a cutting lubricant disposal device for a machine tool, which is inexpensive and simple in structure, and can efficiently recover the various kinds of metallic powder mixed in cutting lubricant when cutting is processed by the machine tool. CONSTITUTION: A stock solution introduction port which introduces cutting lubricant containing metallic powder generated by processing by a machine tool 11 from the tangential direction, is provided for the upper section of a cylindrical disposal tank main body 21. A solution permeable plate 24 in a cylindrical shape having solution permeable properties is coaxially disposed in the inside of the disposal tank main body 21 via a stock solution turning space 23 where stock solution is turned around, and a cylindrical shielding plate 27 acting as an inner circumferential wall for turning flows is coaxially disposed in the inside of the solution permeable plate 24 via a solution permeable gap 26. A processed solution take-out pipe 30 which takes out processed solution having flowed in the inside of the solution permeable plate 24 to the outside out of a bottom section, is drawn outside out of the bottom section of the solution permeable plate 24. A precipitation tank 40 which precipitates agglomerates enlarged in grain size by an aggregating action in the stock solution turning space 23, is provided at the bottom section of the disposal tank main body 21, and an agglomerate discharging conveyor 42 which moves agglomerates upward and discharges them outside, is provided at the bottom section of the precipitation tank 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool cutting liquid treating apparatus for removing metal powder from a cutting liquid such as cutting oil discharged from a machine tool for machining such as cutting and polishing. .

[0002]

2. Description of the Related Art As shown in Japanese Utility Model Publication No. 5-2271, floating chips on the coolant surface of a dirty tank kept at a constant water level are positively scratched to a magnetic separation device by a scraper type chip conveyor. There is a chip removing device that adsorbs the floating chips on the outer circumference of the magnet drum, defoams and defoams them, and discharges them.

[0003]

This conventional chip removing device is expensive because it uses a special magnet drum, and the recoverable object is magnetic metal powder that can be attracted by a magnet such as iron powder. There is a problem that expensive non-magnetic metal powder that cannot be attracted by a magnet cannot be collected.

The present invention has been made in view of the above points, and can efficiently collect various metal powders mixed in the cutting fluid by machining such as cutting and polishing of a machine tool, and the structure is simple and inexpensive. An object of the present invention is to provide a cutting fluid treatment device for machine tools.

[0005]

According to a first aspect of the present invention, there is provided a processing device for cutting fluid for machine tools, which removes metal powder from cutting fluid containing metal powder generated by machining of a machine tool. Cylindrical processing tank main body having the undiluted solution inlet for introducing the previous undiluted solution from the tangential direction, and liquid permeability concentrically arranged inside this processing tank main body through the undiluted solution swirling space A cylindrical liquid passage plate, a cylindrical shielding plate arranged concentrically inside the liquid passage plate with a liquid passage gap, and a liquid passage plate drawn out from the bottom of the liquid passage plate to the outside. A structure provided with a treated liquid take-out pipe for taking out the treated liquid flowing inward to the outside, and a settling tank provided at the bottom of the treatment tank main body for precipitating agglomerates that have become large due to agglomeration in the stock solution swirling space. This is a cutting fluid treatment device for machine tools.

According to a second aspect of the present invention, in the machine tool cutting liquid treatment apparatus according to the first aspect, a lid plate is detachably fitted to an upper opening of the treatment tank body. The liquid passing plate and the shielding plate are integrally attached to the liquid passing plate, and the treated liquid outlet portion provided at the lower portion of the liquid passing plate is detachably fitted to the treated liquid take-out pipe.

According to a third aspect of the invention, in the apparatus for treating cutting fluid for machine tools according to the first aspect, the agglomerate is transferred to the bottom of the settling tank and discharged to the outside. This is a configuration in which a discharge conveyor is provided.

[0008]

In the invention described in claim 1, when the undiluted solution before treatment is tangentially introduced from the undiluted solution inlet at the upper part of the processing tank body, the undiluted solution swirls in the undiluted solution swirling space,
Only the liquid component in the undiluted solution flows into the inside through the liquid passage plate, becomes the treated liquid, goes down the liquid passage gap, and is taken out through the treated liquid take-out pipe to the outside. On the other hand, the metal powder, which has a larger specific gravity than the liquid,
It is separated toward the main body of the processing tank by the outward centrifugal force, and while swirling along the inner wall surface of the main body of the processing tank, it gradually grows while repeating the mutual agglomeration action between metal powders to form large-sized aggregates, and precipitates. Settle in the tank.

According to the second aspect of the present invention, by removing the lid plate from the upper opening of the processing tank main body, the liquid passage plate and the shielding plate integrated with the lid plate can also be taken out from the upper opening of the processing tank main body. it can. At this time, the treated liquid outlet portion provided at the lower portion of the liquid passage plate is removed from the treated liquid take-out pipe.

According to the third aspect of the invention, the agglomerates settled at the bottom of the settling tank are transferred upward by a agglomerate discharge conveyor and discharged to the outside.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in FIGS.

In FIG. 1 (A), 11 is a machine tool that performs machining such as cutting and polishing while being supplied with a cutting fluid, and is a used machine containing metal powder generated in the machined portion of the machine tool 11. A stock solution take-out pipe 12 for taking out the cutting liquid is connected to a receiving tank 13 for the present processing apparatus.

A stock solution introducing pipe 14 drawn out from the bottom of the receiving tank 13 is tangentially connected to a cylindrical processing tank main body 21 as shown in FIG. 1 (B). Figure 1 (A)
As shown in FIG. 3, a stock solution inlet 22 is provided in the upper part of the processing tank body 21 to introduce the unprocessed stock solution into the processing tank body 21 from the stock solution introducing pipe 14 in a tangential direction.

As shown in FIG. 1 (B), a cylindrical liquid passage plate 24 is concentrically arranged inside the processing tank main body 21 with a stock solution swirling space 23 in which the stock solution swirls. The liquid passing plate 24 is formed by forming a punching metal plate into a cylindrical shape in which a large number of small liquid passing holes 25 are formed at a uniform density over the entire surface. It can be sucked into the liquid passage gap 26 inside from the liquid passage small hole 25.

Further, a cylindrical shield plate 27 is concentrically arranged inside the liquid passage plate 24 with the liquid passage gap 26 interposed therebetween. The lower end of the shield plate 27 is provided up to the vicinity of the bottom plate portion 28 of the liquid passage plate 24, but is slightly shorter than the liquid passage plate 24.
A liquid passage portion 29 is formed between the bottom plate portion 28 and the bottom plate portion 28. While the processing bath main body 21 is the outer peripheral wall of the swirling flow, the shielding plate 27 functions as an inner peripheral wall of the swirling flow and has a function of maintaining the swirling flow together with the processing bath main body 21.

A treated liquid take-out pipe 30 from the bottom of the liquid passage plate 24.
Has been pulled out. The treated liquid take-out pipe 30 flows into the inside of the liquid passing plate 24 and flows into the liquid passing gap 26 and the liquid passing portion.
The processed liquid after 29 is taken out to the outside.

As shown in FIG. 1A, a tank 31 is connected to the treated liquid take-out pipe 30, and a pump 32 is installed in the tank 31. This pump 32 sucks up the processed liquid in the tank 31 from the in-tank filter 33, and discharges the treated liquid.
The cutting fluid is circulated through the machining section of the machine tool 11 via 34.

At the bottom of the processing tank body 21, there is provided a precipitation tank 40 whose diameter is gradually reduced downward. Aggregates that have grown into large particles by the interference aggregation action in the undiluted solution swirling space 23 settle in the sedimentation tank 40 due to their own weight.

At the bottom of the settling tank 40 is a conveyor connection opening.
41 is provided in an inclined shape, and a lower part of an aggregate discharge conveyor 42 that transfers the aggregate to the upper side and discharges the aggregate to the outside is connected to the opening 41 and is provided in an inclined shape.

In this aggregate discharge conveyor 42, a long spiral blade 44 is rotatably fitted over the entire length inside a cylindrical casing 43, and a rotary shaft 45 of this spiral blade 44 is
A drive shaft 47 of a reduction motor 46 integrally attached to the upper end of the cylindrical casing 43 is connected via a coupling 48.

A drop port 49 for discharging the agglomerate W is provided on the lower surface of the upper part of the cylindrical casing 43, and an agglomerate collection container 50 is arranged below the drop port 49.

As shown in FIG. 2, an engaging portion 52 is integrally provided in the upper surface opening 51 of the processing tank main body 21, and the engaging portion 52 is provided.
The lid plate 53, which is detachably fitted to the upper surface opening 51, is locked. A handle 54 is integrally attached to the center of the upper surface of the lid plate 53, and the liquid passage plate 24 and the shielding plate 27 are integrally attached to the lower surface thereof.

Further, a treated liquid outlet portion 56 is integrally provided at the center of the bottom plate portion 28 of the liquid passage plate 24, and an O ring 57 is fitted to the treated liquid outlet portion 56. At the inner end of the treated liquid take-out pipe 30, there is provided a fitting port portion 58 whose upper surface is opened at the center of the treatment tank main body 21, and the treated liquid outlet port of the liquid passing plate 24 is provided at the fitting port portion 58. The part 56 is detachably fitted,
The O-ring 57 keeps the liquid-tightness between the two openings 56 and 58.

Next, the operation of the illustrated embodiment will be described.

When a cutting fluid containing metal powder generated by machining of a machine tool, that is, an untreated undiluted solution is introduced from the undiluted solution introduction port 22 in the upper part of the processing tank body 21 into the inside of the processing tank body 21 in a tangential direction, While the undiluted solution swirls in the undiluted solution swirling space 23, only the liquid component in the undiluted solution flows inward through the small through-holes 25 in the liquid passing plate 24 to become a treated liquid and descend through the liquid passing gap 26, It is taken out from the liquid passing portion 29 through the treated liquid taking-out pipe 30.

On the other hand, since the metal powder such as iron powder in the stock solution has a larger specific gravity than the solution, it is centrifugally separated toward the processing tank main body 21 side by the outward centrifugal force generated by the swirling motion in the stock solution swirling space 23.
It gradually descends while turning along the inner peripheral wall surface of the processing tank main body 21.

At this time, the metal powder gradually grows into a large-sized agglomerate while repeating the mutual agglomeration action between the metal powders. This aggregation action is promoted by the interference action received from the inner peripheral wall surface of the processing tank main body 21.

That is, the metal powder such as cutting powder, polishing powder and the like collected on the outer peripheral side of the swirling flow has a property of aggregating with each other by itself, but further due to interference and capture on the inner wall surface of the processing tank main body 21. Due to the interference aggregating action that promotes the bonding of the metal powders, the metal powder gradually grows into particles while turning, and settles in the settling tank 40 by its own weight.

The time required for this interference coagulation action is sufficiently secured by the annular swirling passage formed by the cylindrical processing tank main body 21 and the shielding plate 27.

Therefore, even if the metal powder in the stock solution initially introduced into the processing tank main body 21 is smaller than the liquid passage small hole 25 of the liquid passage plate 24, the centrifugal force due to the swirling is large at the beginning of the introduction. Without being sucked into the liquid passage small hole 25 from
It grows as described above and settles in the settling tank 40 by its own weight.

The agglomerates settled at the bottom of the settling tank 40 are transferred upward by the spiral blades 44 of the agglomerate discharge conveyor 42 and dropped from the drop port 49 into the agglomerate recovery container 50 below.
At this time, the liquid component is separated downward by its own weight from the ascending aggregates in the cylindrical casing 43, and as the aggregates move upward, the liquid draining state advances.

Therefore, the drop outlet of the aggregate discharge conveyor 42
It is preferable that 49 be provided at a position higher than the upper surface opening 51 of the processing tank main body 21, so that the aggregates can be more completely drained and dried. The aggregate thus recovered is used as a metal powder of the processing material and thus reused.

Finally, when performing maintenance on the inside of the processing tank main body 21, by removing the lid plate 53 from the upper opening of the processing tank main body 21, the liquid passage plate 24 and the shielding plate integrated with the lid plate 53.
Since 27 can also be taken out from the upper opening 51 of the processing tank main body 21, the processing tank main body 21, the liquid passage plate 24, and the shield plate 27 can be easily cleaned. At this time, the processed liquid outlet 56 provided in the lower portion of the liquid passage plate 24 is detached from the fitting port 58 of the processed liquid take-out pipe 30.

[0034]

According to the first aspect of the present invention, the liquid passage plate is arranged inside the cylindrical processing tank main body through the undiluted liquid swirling space, and the liquid passage plate is provided inside the liquid passage plate. A shield plate is placed, and only the treated liquid that has flowed inside the liquid passage plate is taken out from the bottom of the liquid passage plate through the treated liquid take-out pipe to the outside.Metal powder with a larger specific gravity than the liquid is generated by the swirling motion. By moving the liquid along the inner peripheral wall surface of the processing tank main body by the outward centrifugal force, it is possible to surely separate the liquid flowing toward the inner side of the liquid passing plate and prevent the liquid passing plate from being clogged with the metal powder.

In particular, even metal powder having a diameter smaller than that of the small holes of the liquid passage plate is centrifugally separated toward the inner peripheral wall surface of the processing tank main body, and due to interference on the inner peripheral wall surface of the processing tank main body. Due to the mutual agglomeration action between the metal powders, the metal powders can be gradually grown and reliably settled in the settling tank.

As a result, the metal powder mixed in the cutting fluid or the like during processing such as cutting or polishing of the machine tool is efficiently aggregated and precipitated regardless of its magnetic and non-magnetic properties and its particle size. It is possible to obtain excellent throughput and recovery efficiency. Further, the present apparatus, which can be configured by only general components without using special components, can be provided at low cost.

According to the second aspect of the present invention, since the liquid passage plate and the shielding plate are integrally attached to the lid plate which is detachable from the treatment tank body, the treatment tank body, the liquid passage plate and the shielding plate are cleaned. Can be easily maintained.

According to the third aspect of the present invention, since the aggregate discharge conveyor for transferring the aggregate upward and discharging it to the outside is provided at the bottom of the settling tank, the aggregate recovery process can be easily performed. You can

[Brief description of drawings]

FIG. 1A is a schematic cross-sectional view showing an embodiment of an apparatus for treating a cutting fluid for machine tools according to the present invention, and FIG. 1B is a B of FIG.
It is a -B line sectional view.

FIG. 2 is a cross-sectional view of a main body portion of the same processing apparatus.

[Explanation of symbols]

 11 Machine tool 21 Treatment tank main body 22 Undiluted solution inlet 23 Undiluted solution swirl space 24 Liquid passage plate 26 Liquid passage gap 27 Shield plate 30 Treated liquid take-out pipe 40 Precipitation tank 42 Aggregate discharge conveyor 51 Top opening 53 Lid plate 56 Treated liquid Outlet part

Claims (3)

[Claims] 1. An apparatus for treating a cutting fluid for a machine tool, which removes metal powder from a cutting fluid containing metal powder generated by machining a machine tool, wherein an undiluted solution inlet for introducing the undiluted solution before treatment is tangential And a cylindrical liquid passage plate having a liquid permeability, which is concentrically arranged inside the treatment tank main body through a raw liquid swirling space in which the raw liquid swirls, and the liquid passage plate. A cylindrical shielding plate that is concentrically arranged inside the liquid passage through a liquid passage gap, and a treated liquid that is drawn out to the outside from the bottom of the liquid passage plate and flows into the inside of the liquid passage plate to the outside. An apparatus for treating cutting fluid for machine tools, comprising: a take-out pipe; and a settling tank which is provided at a bottom portion of the processing tank main body and settles agglomerates that have become large due to agglomeration in the undiluted solution swirling space. 2. A treated liquid provided on a lower portion of the liquid passage plate, wherein a lid plate is detachably fitted to an upper surface opening of the treatment tank main body, and a liquid passage plate and a shielding plate are integrally attached to the lid plate. The cutting fluid treatment device for machine tools according to claim 1, wherein the outflow port portion is detachably fitted to the treated fluid extraction pipe. 3. The apparatus for treating cutting fluid for machine tools according to claim 1, further comprising: an aggregate discharge conveyor for transferring the aggregate upward and discharging the aggregate at the bottom of the settling tank.