JPH10328969A - Liquid treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heighten cleanliness and clean liquid from a machine without accumulating foreign matters such as ships and abrasive grains at the bottom part of a tank. SOLUTION: This device A recovers used liquid containing iron group metal chips by being fed to a specified liquid use place (a), into a first tank 4 and feeds the recovered liquid flowing into a second tank 5 via the first tank 4, back to the liquid use place (a). It is provided with a rotating magnet plate 37 rotatory-driven being partially exposed from the liquid level of the first tank 4, a separating device 42 for separating chips attracted to the rotating magnet plate 37 above the liquid level, and a first pump 21 for generating circulating flow S1 circulating liquid at a bottom part in the first tank 4 toward the rotating magnet plate 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid processing apparatus which is attached to various types of machining machines and the like, and in which a cooling liquid which has been cooled or washed for a workpiece is cleaned and supplied to the workpiece again. .

[0002]

2. Description of the Related Art Various types of cutting blades and workpieces generate heat when machining workpieces using various types of machining machines or when dressing a rotary grindstone for machining. Foreign matter such as chips and abrasive grains is generated. Therefore, the machining machine is provided with a grinding fluid circulation system for continuously supplying a coolant to a cutting blade of the machining portion or a workpiece. The main part of this grinding fluid circulation system is composed of a liquid processing device. This liquid processing device continuously cools the cutting blade and the work and removes the cutting chips so that the cutting blade and the work can be removed. Means for collecting the grinding fluid flowing down from the tank and cleaning it to a reusable state.

For example, as shown in FIG. 6, a liquid processing apparatus used for a grinding machine or the like collects a grinding fluid mixed with foreign matter in a processing part a1 of the grinding machine, and collects the grinding fluid into a magnet separator 110 and a grinding fluid tank 120. And the grinding fluid cleaned by the foreign matter removing means is supplied again to the processing unit a1 by the pump 130. Here, the magnet separator 110 rotates the magnet drum 140 to adsorb foreign matter such as chips from the grinding fluid, and further removes and removes such foreign matter such as chips by the separation plate 150 provided above the magnet drum. ing. The separation efficiency of this type of magnet separator 110 is generally about 5
It is about 0%.
Removed at 20. Here, the grinding fluid is sequentially guided to each settling tank 170 divided by a plurality of weirs 160, and each settling tank 170
In the above, foreign substances such as abrasive grains and iron powder in the grinding fluid are precipitated and cleaned.

In Japanese Patent Application Laid-Open No. 7-171735, a liquid after cleaning a workpiece in a cleaning chamber is guided to a dirty tank, and a filter is provided in a liquid supply path from the dirty tank to the clean tank. In addition, a filter cleaning passage for re-supplying the cleaning liquid in the clean tank to the cleaning chamber by the pump and sending the cleaning liquid in a direction opposite to the direction at the time of filtration is provided, thereby eliminating the need for filter replacement.

[0005]

However, in the case of the liquid processing apparatus shown in FIG.
Chips and the like in the recovered liquid that could not be separated in 0 were settled by passing through several settling tanks 170, thereby cleaning the grinding liquid.
No sufficient cleaning could be achieved with an apparatus using. Moreover, in the conventional apparatus shown in FIG. 6, foreign substances such as abrasive grains and iron powder in the collected grinding fluid are sequentially deposited on the bottom of each settling tank 170 as the use time elapses. Therefore, the grinding fluid tank 12
It is necessary to perform cleaning of 0, and as a result, a machining machine such as a grinder is stopped, and the grinding fluid in the grinding fluid circulating system including the liquid processing device is exchanged, which increases costs and reduces product costs. This is a problem in trying to lower it.

Further, in the liquid processing apparatus disclosed in Japanese Patent Application Laid-Open No. 7-171735, a pump is also required in the filter cleaning passage, and the configuration of other parts is complicated, and the apparatus itself tends to increase the cost. In addition, the coolant in the dirty tank and the clean tank passes through the strainer and is sucked into each pump.At this time, foreign substances such as relatively large chips are removed by the strainer, and these chips are left at the bottoms of both tanks. Will stay. For this reason, even in this apparatus, the inside of the tank needs to be frequently cleaned. In this case as well, a machining machine such as a grinder is stopped and the grinding fluid is exchanged, which is a costly problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid processing apparatus capable of sufficiently improving the cleanliness and cleaning a recovery liquid from a processing machine without depositing foreign matter such as chips and abrasive grains on the bottom of the tank. It is to provide a device.

[0008]

According to a first aspect of the present invention, a used liquid mixed with iron-based metal chips is collected in a first tank by being supplied to a predetermined liquid use location. This is a circulation type liquid processing apparatus that returns the recovered liquid that has flowed into the second tank via the first tank to the liquid use point again. In particular, the rotary magnet plate that is driven to rotate is partially moved above the liquid level of the first tank. To separate the chips attached to the rotating magnet plate by a separator above the liquid level of the first tank, and the liquid at the bottom of the first tank is directed to the rotating magnet plate by the circulating flow from the pump. Circulate. In this way, the liquid at the bottom of the first tank is pumped up by the liquid flow from the pump and circulated toward the rotating magnet plate, so that foreign matters such as chips can be prevented from staying at the bottom and the liquid can be prevented. Chips floating inside can be easily collected near the rotating magnet plate, and foreign matter such as chips collected by the magnetic force of the rotating magnet plate is separated at a position above the liquid level of the first tank by the separating device. Therefore, iron powder and the like in the first tank can be efficiently collected, and the cleanliness of the liquid can be increased. And the first
Purification of liquid can be promoted while preventing foreign substances such as chips from settling at the bottom of the tank, and the frequency of periodic cleaning of the tank and replacement and replenishment of the liquid in the tank is reduced, and the frequency of liquid replacement is reduced. As a result, costs can be reduced, and there is no need to stop the processing machine, so that the cost of the product can be reduced.

According to a second aspect of the present invention, a liquid collecting path is provided in the liquid inflow path to the first tank. A magnet is attached to the bottom at a shallow bottom, and the liquid flows out to the first tank. In this way, the liquid flowing into the first tank is purified to some extent by the removal of the foreign matter and the collection of the chip in advance in the process of passing through the deep bottom foreign matter accumulation section and the shallow bottom chip recovery section. As a result, the cleanliness of the liquid in the first tongue can be effectively increased. In addition, since the flow of the liquid can be made gradual in the process of flowing the liquid from the deep-floor foreign matter collecting part to the shallow-floor chip collecting part, the efficiency of collecting foreign matter and iron powder can be improved.

According to a third aspect of the present invention, a magnetic separator for collecting chips mixed with used liquid is mounted in the liquid inflow path to the first tank, and the pump sucks the liquid in the first tank. In addition to generating a circulating flow, a part of the discharged liquid is divided and returned to the separator. in this way,
Since the chips are collected by the magnetic separator before the liquid flows into the first tank, the liquid flowing into the first tank is purified to some extent, and the cleanliness of the liquid in the first tank is improved. Can be further improved. Further, since the liquid in the first tank is returned to the magnetic separator by using a pump for generating a circulating flow, the purification of the liquid in the first tank is effectively promoted by using the magnetic separator. be able to.

According to a fourth aspect of the present invention, the second rotary magnet plate which is driven to rotate is provided so that a part thereof is exposed above the liquid level of the second tank, and the second separation plate is provided above the liquid level of the second tank. The apparatus separates chips from the second rotating magnet plate, generates a circulating flow for circulating the liquid in the bottom of the second tank toward the second rotating magnet plate by the second pump,
The rotating magnet plate can be driven to rotate by a common driving means.
As described above, foreign substances such as cutting chips in the second tank can be efficiently collected in the same manner as in the first tank, thereby further purifying the liquid once purified in the first tank. Can be. Also, the rotating magnet plate for the first tank and the second
The second rotating magnet plate for the tank can be rotationally driven by the common driving means, and the apparatus can be relatively simplified.

[0012]

FIG. 1 shows a liquid processing apparatus as an embodiment of the present invention. The liquid processing apparatus A is attached to a grinding machine (not shown) and constitutes a main part of a grinding fluid circulation system for continuously supplying a grinding fluid to a processing section a in the grinding machine.
Here, the liquid processing apparatus A includes a liquid inflow path R1 extending from a processing portion a, which is a liquid use point of the grinding machine, and a liquid inflow path R
Magnet-type magnetic separator 1 provided on 1
(Hereinafter simply referred to as a separator), an abrasive reservoir 2 for receiving the grinding fluid from the separator 1 and a swarf collecting unit 3 continuous therewith, and a dirty tank as a first tank for receiving the grinding fluid from the swarf collecting unit 3 It has a tank 4, a clean tank 5 as a second tank continuously provided downstream of the dirty tank 4, and a liquid outflow path R2 for supplying the grinding liquid in the clean tank 5 to the processing portion a of the grinding machine again.

The liquid inflow path R1 is formed continuously from the processing part a to the dirty tank 4, and a liquid inflow pipe 6 forming a part thereof is piped so as to descend continuously from the processing part a toward the separator 1. The lower end communicates with the tank 7. The tank unit 7 is mounted on a side wall of a grinding liquid tank 15 described later via a frame base 16.

As shown in FIG. 4, the entire tank 7 has a box shape with an upper opening, and a magnet drum (hereinafter referred to as a magnetic drum) integrated with a rotating shaft 8 between tank side plates 701 on the left and right sides (in FIG. (Abbreviated as MG drum) 9.
A magnet is provided on the peripheral surface of the MG drum 9 to collect chips. A drum driving mechanism 11 is connected to an end of the rotating shaft 8. The tank part 7 has a discharge port 702 formed at a predetermined height position on the tank side plate 701, a bent pipe 10 is connected to the discharge port 702, and the tip of the bent pipe 10 is provided to face the abrasive grain reservoir 2. You. The grinding fluid flowing into the tank 7 is
The liquid level is maintained up to the height H1 of 02, and the liquid exceeding the liquid level flows down to the abrasive grain reservoir 2. The MG drum 9 in the tank 7 is arranged so that its upper part protrudes above the liquid surface of height H1. In addition, a separation plate 1 that scrapes off foreign matter such as chips attached to the MG drum 9 is provided above a part of the MG drum 9.
2 comes in sliding contact. The separation plate 12 is tilted and the tank 7
The lower end side of the container is supported by the front side wall 703, and its lower end is penetrated into the upper opening of the waste container 13 provided near the tank portion 7. The waste container 13 is detachably fixed on the frame 16 by fixing means (not shown).

As shown in FIG. 4, the drum driving mechanism 11 has a motor 26 mounted above the tank section 7 via the bracket 14 and a chain reduction mechanism for reducing the rotation and transmitting the rotation to the sprocket 111 of the rotating shaft 8. The motor 26 is connected to a power supply circuit (not shown), and drives the MG drum 9 at a predetermined rotation speed when the power supply circuit is turned on. Note that an opening of a water tap 17 (see FIG. 1) communicating with a second branch pipe 292 described later is provided opposite to the upper opening of the tank section 7.

As shown in FIGS. 1 and 5, the separator 1
The abrasive grain reservoir 2 receiving the grinding fluid from the bent pipe 10 and the chip recovery unit 3 continuous therewith are integrally formed as a long plate-shaped flow path forming body B. The flow path forming body B forms a part of the liquid inflow path R 1, and a bracket 18 is provided above the grinding liquid tank 15.
Can be integrally mounted via The abrasive grain reservoir 2, which is one half of the flow path forming body B, is formed in a substantially box-shaped, relatively large-capacity deep dish shape, and is used for removing abrasive grains, cutting chips, and the like in the grinding fluid flowing from the separator 1. Foreign matter is precipitated on the bottom 201, and the upper grinding fluid flows out to the chip recovery unit 3 side. The swarf collecting section 3 includes an inclined plate 301, left and right guide walls 302, and permanent magnets 303 supported by the inclined plate 301, and is entirely formed as a magnet plate. The inclined plate 301 is made of sheet metal and has a plurality of recesses formed therein, and a rectangular permanent magnet 303 is fitted therein. In particular, the upper surfaces of the permanent magnet 303 and the inclined plate 301 are formed so as to form a continuous plane F1. This facilitates scraping off chips and abrasive grains during daily maintenance.

The grinding fluid tank 15 is set to have a capacity capable of accommodating substantially all of the grinding fluid in the grinding fluid circulating system when a grinding machine (not shown) is stopped. As shown in FIG. 2, an outer peripheral wall 151 and a bottom wall 152 are provided. Formed in a box shape. Further, as shown in FIG. 3, the inside of the grinding fluid tank 15 is bent first and second partition walls 1.
The dirty tank 4 and the clean tank 5 are divided into two parts 9 and 20. In addition, the main mounting table 2 is provided on a part of the outer peripheral wall 151 and the upper end of the first and second partition walls 19 and 20.
3. The pump stand 24 is integrally mounted. The main mounting table 23 is provided with a clean pump C and a first pump 21 for pumping the grinding fluid of the dirty tank 4 described later, and the pump table 24 is provided with a second pump 22 for pumping the grinding fluid of the clean tank 5.

The dirty tank 4 is formed in a rectangular container shape by a portion on the near side of the outer peripheral wall 151, the first and second partition walls 19 and 20, and the bottom wall 152 in FIG. The dirty tank 4 is provided with a chip collecting portion 3 at one end of an upper opening thereof.
9 through the communication port 30 formed in a part of the clean tank 5
The grinding fluid can flow out to the side. A first pump 21 is provided above the dirty tank 4, and a suction pipe 28 extends from directly below the first pump 21. Discharge pipe 29 of first pump 21
Is branched, and one of the first branch pipes 291 extends to a central area r1 near the communication port 30 of the dirty tank 4, and a nozzle 35 provided at the tip thereof is directed toward an upstream area r2 opposite to the central area r1. It is configured to discharge a liquid. The other second branch pipe 292 extends to the tank portion 7 of the separator 1 described above, and is formed so that the tip end thereof can recirculate the grinding fluid to the tank portion 7 via the water tap 17.

The clean tank 5 includes an outer peripheral wall 151, a first and second partition walls 19 and 20, and a bottom wall 152 in FIG.
And the communication port 3 of the first partition wall 19 is formed.
It communicates with the dirty tank 4 through 0. Above the clean tank 5, the second pump 2 supported by the pump stand 24
2 is provided, and a suction pipe 32 is provided immediately below the pump.
(See FIG. 2). Discharge pipe 33 of second pump 22
Is branched, and one first branch pipe 331 (see FIG. 1)
Forms a liquid outflow path R2, and the grinding fluid is supplied to the liquid outflow path R2.
To a processing section a of a grinding machine (not shown). As shown in FIG. 3, the other second branch pipe 332 extends to the downstream area r3 farthest from the communication port 30 and has a nozzle 3
4 is configured to discharge the liquid toward the bending area r4 on the upstream side. The first and second pumps 21 and 22 are connected to a power supply circuit (not shown), and circulate the grinding fluid when the power supply circuit is turned on.

On the main mounting table 23, a clean kit C is mounted. The clean kit C includes a first rotating magnet plate 37 provided in a central area r1 of the dirty tank 4 and a bent area r4.
The second rotating magnet plate 38 provided in the
A rotating shaft 39 that integrally connects the first and second shafts 7 and 38; a pair of bearing members 40 that pivotally support the rotating shaft 39 on the main mounting table 23;
9, a pair of separation devices 42 for separating chips attached to the rotating surface fr of the first rotating magnet plate 37, and a chip attached to the rotating surface fr of the rotating magnet plate 38. And a pair of separation devices 43 for separation.

As shown in FIG. 3, cuts 25 and 27 are formed in the main mounting table 23 at opposing portions of the central area r1 and the bent area r4, and the first and second rotating magnet plates 3 are formed in these cuts.
7, 38 are fitted. The first and second rotating magnet plates 37,
38 has the same structure, that is, bosses 371 and 381 connected to the rotating shaft 39, discs 372 and 382 of a certain thickness supported at the center by the bosses, and embedded in the discs. It is formed by a large number of permanent magnets 373 and 383 mounted. As shown in FIG. 1, the permanent magnets 373 and 383 are arranged so as to be uniformly dispersed and scattered on the disk portions 372 and 382, and these disk portions 372 and 382 and a large number of permanent magnets 373 and 383 are provided. Is formed as a continuous surface. Further, as shown in FIG. 2, the first and second rotating magnet plates 37 and 38 have their lower halves penetrated below the liquid level wf of the dirty tank 4 and the clean tank 5 to expose the upper halves. It is held rotatably in the state.

The rotation driving means 41 is provided with a motor 46 mounted on the end of the main mounting table 23 and a rotation shaft 3 for reducing the rotation thereof.
Chain transmission mechanism 48 for transmitting to the sprocket 47
The motor 46 is connected to a power supply circuit (not shown), and when the power supply circuit is turned on, the first and second rotating magnet plates 3
7, 38 are rotationally driven.

A pair of separation devices 42 for separating chips are provided at the portions of the first rotating magnet plate 37 facing the left and right rotating surfaces fr. Here, each separation device 42 is connected to the main mounting table 23.
And a separation plate 422 supported on the upper end of the waste container 421. The separation plate 422 is a resin plate having elasticity, and is in sliding contact with the rotating surface fr while maintaining a predetermined width b (see FIG. 3), thereby scraping chips and the like adhering to the rotating surface fr. It is formed so that it can be dropped into the waste container 421. The predetermined width b of the separation plate 422 is equal to the rotation surface fr.
All the permanent magnets 373 scattered in the first rotating magnet plate 3
7 is set so as to sequentially come into contact with the separation plate 422 and scrape off the adhered foreign matter when the 7 rotates. Waste container 421
Is fixed to the main mounting table 23 so as to be detachable by fixing means (not shown), and is formed so that waste such as cutting chips accumulated inside can be removed in a timely manner.

The left and right rotating surfaces f of the second rotating magnet plate 38 are similar to the separating device 42 provided opposite the first rotating magnet plate 37.
A pair of separation devices 43 each including a waste container 431 and a separation plate 432 are also provided in r. The operation of the liquid processing apparatus of FIG. 1 will be described.

First, when a grinding machine (not shown) is driven,
A pump drive circuit (not shown) is turned on, the first pump 21 pumps up the grinding fluid in the dirty tank 4, circulates the grinding fluid in the dirty tank 4 with the fluid discharged from the nozzle 35, and simultaneously releases one of the grinding fluid in the dirty tank 4. The part is returned to the tank part 7 of the separator 1. On the other hand, the second pump 22
Pumps up the grinding fluid in the clean tank 5 and circulates the grinding fluid in the clean tank 5 with the fluid discharged from the nozzle 34, and simultaneously discharges the grinding fluid in the clean tank 5 with the fluid outflow path R2.
Again to the processing part a of the grinding machine. At the same time, a power supply circuit (not shown) of the drum driving mechanism 11 is turned on, and the MG drum 9 is rotationally driven via the motor 26. Further, the rotation driving means 41 is turned on, and the motor 46, the chain reduction mechanism 48, the rotating shaft 39 Through the first and second rotating magnet plates 3
7, 38 start rotating, and the first and second rotating magnet plates 37, 3
The chips attached to each rotating surface fr of No. 8 are sequentially
43, the chips attached to the rotating surface fr
2,432, and each waste container 421,4
The grinding fluid in the dirty tank 4 and the clean tank 5 is thereby cleaned.

As described above, when the grinding machine (not shown) starts to be driven, the grinding fluid containing foreign matter such as chips and abrasive grains is applied to the processing section a.
Flows into the separator 1 via the liquid inflow path R1.
The separator 1 precipitates foreign matter on the bottom of the tank part 7 and adsorbs foreign matter such as cutting chips in the grinding fluid that is retained by the rotating MG drum 9, and separates and transports the foreign matter above the liquid surface of height H 1. Foreign substances such as chips are scraped off by the separation plate 12 and stored in the waste container 13. In addition, foreign substances such as abrasive grains deposited on the bottom of the tank unit 7 and foreign substances deposited on the waste container 13 are periodically collected and eliminated.

Here, even if the separator 1 breaks down, since the abrasive grain collecting section 2, the chip collecting section 3, and the tanks 4 and 5 carry out the cleaning process, the MG drum 9 and the like are taken from the tank section 7. The grinder can be driven without the drum during the removal, and the machine does not need to be stopped, and there is no need for handling time in chip processing. Bent tube 1 of separator 1
From 0, the grinding fluid flows into the abrasive reservoir 2.

Since the abrasive reservoir 2 has a relatively large capacity, foreign substances such as abrasives that have not been removed by the separator 1 can be deposited on the bottom 201, foreign substances heading for the dirty tank 4 can be removed, and the upper part of the abrasive can be ground. The liquid can be poured into the chip recovery unit 3. When the grinding fluid slowly flows down the inclined continuous plane F1 of the chip recovery unit 3 in a laminar flow state, foreign substances such as chips and abrasive grains are adsorbed by the permanent magnets 303 on the continuous plane F1 and accumulated. I do. The bottom 201 and the continuous plane F1 of the abrasive grain reservoir 2 are connected to the dirty tank 4
Foreign matter toward the first pump 21 can be sufficiently removed, and the durability of the first pump 21 can be improved. Furthermore, since the bottom 201 and the continuous plane F1 of the abrasive grain reservoir 2 are sufficiently open above them and are relatively shallow, they have a structure that is relatively easy to see. The work of removing foreign substances such as abrasives and abrasive grains is facilitated, and the daily maintenance burden on the operator can be reduced.

In this case, it is desirable that the flow of the chip recovery unit 3 is set as gently as possible to improve the efficiency of cleaning. In the apparatus shown in FIG. 1, the grinding fluid after passing through the abrasive reservoir 2 and the chip recovery unit 3 is guided to the dirty tank 4, so that the amount of foreign matter such as chips and abrasive grains flowing into the dirty tank 4 is suppressed. In this case, the cleanliness of the dirty tank 4 can be sufficiently increased. However, in some cases, the abrasive reservoir 2 and the chip recovery unit 3 are eliminated, and the grinding fluid is directly flown from the separator 1 to the dirty tank 4, The apparatus may be simplified.

In the dirty tank 4, the first pump 21
Is driven, and the flow S1 of the liquid discharged from the nozzle 35 through the first branch pipe 291 is higher than the central area r1 in the upstream area r2.
And detour again to the communication port 30 on the central area r1 side.
At this time, the discharged liquid flow S1 acts to wind up and agitate foreign matters such as chips and abrasive grains deposited on the bottom wall 152 and to push them to the vicinity of the first rotating magnet plate 37. For this reason, foreign matter such as chips and abrasive grains that have been swept away by the discharge liquid flow S1 are removed from the large number of permanent magnets 3 on the rotating first rotating magnet plate 37.
73 can be relatively frequently opposed to the rotating surface fr provided with the foreign matter 73.
3 is conveyed on the water surface wf, and is scraped off by the separating device 42 and removed.

As described above, in the dirty tank 4, the discharged liquid flow S1 always winds up and agitates foreign matters such as chips and abrasives which are to be deposited on the bottom wall 152, and the foreign matters are removed by the first flow.
Since the rotating magnet plate 37 is attracted and removed, foreign matter can be prevented from collecting on the bottom wall 152 of the dirty tank 4, and periodic tank cleaning is not required. Further, here, the second
The branch pipe 292 returns a part of the grinding fluid in the dirty tank 4 to the separator 1 and recirculates it to the separator 1, the abrasive grain collecting part 2 and the chip collecting part 3 on the liquid inflow path R1, where the chip Since foreign matters such as abrasive grains are eliminated, the cleanliness of the grinding fluid in the dirty tank 4 can be further increased in this respect.

The grinding fluid from the dirty tank 4 passes through the communication port 30 and reaches the clean tank 5.
In the clean tank 5, the second pump 22 is driven, and the grinding fluid flowing from the discharge pipe 33 into the second branch pipe 332 is discharged from the nozzle 34. Discharge liquid flow S generated here
2 is the second rotating magnet plate 38 on the bending area r4 side from the downstream area r3.
, And detours toward the suction pipe 32 again. This discharged liquid flow S2 acts to wind up the grinding liquid on the bottom wall 152 side, promote agitation, and push the agitated grinding flow to the vicinity of the second rotating magnet plate 38. Although the grinding fluid reaching the clean tank 5 is being cleaned, it still contains fine particles such as chips and abrasive grains in many cases. Fine particles, such as fine particles, tend to adhere to the rotating surface fr of the second rotating magnet plate 38 relatively frequently by the discharge liquid flow S2. Attached, scraped off by the separating device 43 on the water surface wf, and eliminated.

The grinding fluid that has been cleaned in the clean tank 5 is sucked into the second pump 22 from the suction pipe 32, and flows from the discharge pipe 33 into the first branch pipe 331 through the liquid outflow path R2. Working part a of a grinding machine not shown
Supplied to As described above, in the clean tank 5, the discharge liquid flow S2 constantly stirs the grinding liquid, and efficiently causes the fine particles, such as cutting chips and abrasive grains, attached to the generated bubbles to efficiently face the second rotating magnet plate 38, These fine particles are transferred to the second rotating magnet plate 3
8 can be adsorbed and stored in the separation device 43, the cleanliness of the grinding fluid can be sufficiently increased, and the discharge fluid flow S2 winds up and agitates the grinding fluid on the bottom wall 152. Foreign matter can be prevented from accumulating on the wall 152, and periodic tank cleaning is not required.

As described above, the liquid processing apparatus A shown in FIG. 1 can sufficiently improve the cleanliness. Further, by promoting cleaning, a clean liquid can be used, the life of the cutting blade can be extended, the quality of the workpiece can be improved, and the occurrence of defective products can be reduced. Further, the configuration is simplified and the cost is easily reduced. The burden on the worker at the time of daily maintenance (maintenance) is reduced, the generation of dirt is reduced, and the working environment is improved.
Further, the frequency of stopping the machine can be reduced, and the cost of the product can be easily reduced.

Although the liquid processing apparatus shown in FIG. 1 performs the liquid processing of the grinding liquid of the grinding machine, the present invention is not limited to this. The liquid is recovered from a predetermined liquid use point, and is cleaned. It can be similarly applied to the liquid circulation system that supplies the liquid to the point where the liquid is used again, and can also be applied to the liquid processing device for the grinding liquid used in various processing machines other than the grinding machine, and the cleaning liquid for the various cleaning machines. The same operation and effect can be obtained.

[0036]

As described above, according to the first aspect of the present invention, foreign matter such as chips is prevented from staying at the bottom of the first tank due to the flow of the liquid discharged from the pump. Collecting chips in the vicinity of the rotating magnet plate, and by using the magnetic force of the rotating magnet plate, guides foreign matter such as chips to the separation device and separates it, and efficiently collects chips in the liquid in the first tank. And the cleanliness of the liquid in the first tank can be sufficiently improved. Moreover, it is possible to promote the purification of the liquid while preventing foreign substances such as chips from settling at the bottom of the first tank, to reduce the frequency of regular cleaning of the tank and replacement and replenishment of the grinding liquid in the tank, Since the frequency of replacing the coolant can be reduced, the cost can be reduced, and the necessity of stopping the processing machine is eliminated, so that the cost of the product can be reduced.

According to a second aspect of the present invention, a deep foreign matter accumulation section and a shallow bottom chip recovery section are provided in the liquid inflow path to the first tank, whereby the liquid flowing into the first tank is purified to some extent. Therefore, the cleanliness of the liquid in the first tongue can be effectively improved. In addition, since the flow of the liquid can be made slower in the process of flowing the liquid from the deep bottom foreign matter collecting portion to the shallow bottom chip collecting portion, it is possible to improve the efficiency of collecting foreign matters and chips.

According to the third aspect of the present invention, the chips are collected by the magnetic separator before the liquid flows into the first tank, and the liquid in the first tank is returned to the magnetic separator. The cleanliness of the liquid in the first tank can be further improved by using the separator, and the cleanliness of the liquid in the first tank can be more effectively improved by effectively utilizing the pump.

According to a fourth aspect of the present invention, foreign substances such as chips in the second tank can be efficiently collected in the same manner as in the first tank, and the rotary magnet plate for the first tank and the second Since the second rotary magnet plate for the tank can be rotationally driven by the common driving means, the liquid once purified in the first tank can be further purified, and the apparatus has a relatively simple configuration. There is an advantage that can be adopted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a liquid processing apparatus to which the present invention is applied.

FIG. 2 is a front sectional view of the liquid processing apparatus of FIG.

FIG. 3 is a plan view of the liquid processing apparatus of FIG.

FIG. 4 is an enlarged side sectional view of a separator used in the liquid processing apparatus of FIG.

FIG. 5 is an enlarged side sectional view of an abrasive grain collecting section and a chip collecting section used in the liquid processing apparatus of FIG. 1;

FIG. 6 is a schematic sectional view of a conventional liquid processing apparatus.

[Description of Signs] 1 Separator 2 Abrasive grain collecting part 3 Chip collecting part 4 Dirty tank 5 Clean tank 21 First pump 22 Second pump 37 First rotating magnet plate 38 Second rotating magnet plate 41 Rotary driving means 42 Separator 43 Separation device 152 Bottom part a Processing part wf Liquid surface A Liquid treatment device R1 Liquid inflow path S1 Circulating flow

Claims (4)

[Claims] 1. A used liquid mixed with iron-based metal chips by being supplied to a predetermined liquid use location is collected in a first tank, and flows into a second tank via the first tank. A circulation type liquid processing apparatus for supplying the recovered liquid to the liquid use point again, wherein a rotating magnet plate that is partly exposed above the liquid surface of the first tank and is driven to rotate; A separating device that separates chips attached to the rotating magnet plate above the surface; and a pump that generates a circulating flow that circulates the liquid at the bottom of the first tank toward the rotating magnet plate. Characteristic liquid processing equipment. 2. The liquid processing apparatus according to claim 1, wherein the liquid inflow path to the first tank is provided continuously with the deep bottom foreign matter reservoir into which the used liquid flows, and the foreign matter reservoir. And a chip collecting part for allowing the liquid to flow out to the first tank with a magnet attached to the bottom at a shallow bottom. 3. The liquid processing apparatus according to claim 1, wherein a magnetic separator for collecting chips mixed with the used liquid is mounted on the liquid inflow path to the first tank, and the pump is provided with the first pump. In addition to generating the circulation flow by sucking the liquid in one tank, a part of the discharged liquid is diverted and returned to the separator. 4. The liquid processing apparatus according to claim 1, wherein a second rotary magnet plate is driven to rotate with a part thereof being exposed above a liquid surface of the second tank; A second separator for separating chips from the second rotary magnet plate above; and a second pump for generating a circulating flow for circulating the liquid in the bottom of the second tank toward the second rotary magnet plate. The rotating magnet plate and the second rotating magnet plate are further rotationally driven by a common driving unit.