JP2008036734A - Cutting fluid circulation processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the use of a large capacity of a sewage storage tank or a clean liquid storage tank, and no problem even if a filter that does not have sufficient filtration capacity is used. Even if the water storage tank is arranged on the same floor as the machine tool, the cutting fluid can be circulated smoothly.
SOLUTION: A cutting fluid circulation processing system 20 includes a waste water storage tank T1, a vortex pump P1, a temporary waste water storage tank T2, a filter M1, a cutting waste container W1, a clean liquid storage tank T3, and a pump P2. The coolant reservoir T4 and the cooling device C1 are arranged on the floor. The sewage flowing into the sewage water storage tank T1 is pumped up by the vortex pump P1 and sent to the temporary water storage tank T2. The temporary water storage tank T2 includes a drainage port a2 near the bottom thereof, and an overflow port b1 near the upper portion thereof. The overflow port b2 of the clean liquid reservoir T3 is disposed at a position higher than the liquid level c1 of the dirty liquid reservoir T1.
[Selection] Figure 1

Description

  The present invention relates to a circulation processing system for used cutting fluid containing cutting waste, metal powder, and the like generated when a workpiece (workpiece) is cut in a machine tool such as a lathe, a milling machine, or a grinding machine.

  When machining a workpiece (workpiece) with a machine tool such as a lathe, milling machine, or grinding machine, coolant is used to prevent thermal stress due to frictional heat between the blade and the workpiece and modification (degeneration) of the blade and workpiece. In general, a cutting fluid called “sludge” or “chip” is discharged and removed together with the cutting fluid while supplying a cutting fluid called “sludge” to a processing place to achieve thermal cooling. Dirty cutting fluid containing cutting waste (hereinafter referred to as “dirty fluid”) is filtered to become clean cutting fluid (hereinafter referred to as “cleaning fluid”), and is supplied to the machine tool again. In order for machine tools to operate continuously and stably, it is important that the above-mentioned cutting fluid be circulated smoothly, and as the machine tool speeds up, the cutting fluid is not cut off more and the filtration and circulation efficiency is better. There is a need for a circulating processing system for cutting fluid.

  In recent years, efficient production layout changes corresponding to various types, variable amounts, and short delivery times are frequently performed in production sites, even in relatively large transport equipment such as automobiles. In addition, dirty cutting fluid containing cutting waste may contain environmentally hazardous substances such as hexavalent chromium and lead. Sufficient management is required to prevent environmentally hazardous substances from flowing out of the management area. .

On the other hand, in the circulating processing system of cutting fluid, as in Patent Document 1, a cylindrical processing tank body having a waste liquid inlet for introducing the waste liquid before processing from the tangential direction at the top, and the processing tank body A cylindrical liquid passing plate having a liquid permeability arranged concentrically through a waste liquid swirling space in which the waste liquid swirls, and a concentric arrangement inside the liquid passing plate via a liquid passing gap. A cylindrical shielding plate, a treated liquid extraction pipe for taking out the treated liquid drawn out from the bottom of the liquid passage plate and flowing into the liquid passage plate to the outside, and a bottom portion of the treatment tank body. There is disclosed a cutting fluid circulation processing system for a machine tool, comprising a sedimentation tank for precipitating agglomerates which have been agglomerated by agglomeration in the waste liquid swirl space.
Moreover, like patent document 2, the inflow tank which receives the sewage which flows out from a machine tool, the pump which pumps up the sewage in an inflow tank to the sewage treatment water storage tank, and the inside of the sewage treatment water storage tank A regular polygonal cylindrical filter that rotates around the horizontal axis, and an overflow port that opens to a relatively high position of the sewage treatment water storage tank and returns the cutting fluid in the sewage treatment water storage tank to the inflow tank. A cutting fluid circulation processing system is disclosed.
JP-A-8-192331 Japanese Patent No. 2888774

  FIG. 3 shows a layout of the cutting fluid circulation processing system shown in Patent Document 1. As shown in FIG. As a problem in the case of arranging the cutting fluid circulation processing system, the sewage discharged from the machine tool moves from a high place to a low place by its own weight. Then, it is filtered by the filtering device in the process of moving by the head, becomes a cleaning liquid, is pumped up, and is supplied again to the machine tool. In other words, the height (position) of the entrance to the clean fluid storage tank is not enough to allow the cutting fluid to move to the next processing location, compared to the height (position) of the waste fluid outlet from the machine tool. Must be secured. In order to make this drop, the cleaning liquid reservoir is dug into the floor and embedded. For this reason, when the layout of the machine tool is first determined, there is a problem that it is very difficult to change the layout thereafter. In addition, there is a cost for environmental measures such as preventing the cutting fluid from leaking from the cutting fluid reservoir into the floor.

  Moreover, in the cutting fluid circulation processing system shown in Patent Document 2, it is described that the sewage in the inflow tank is pumped up to a sewage treatment reservoir, and the position of the cutting fluid reservoir can be increased. Suggests sex. However, in the above apparatus, a pump having a large lift capacity (pumping capacity of the pump) must be provided in order to place the cutting fluid reservoir in the same position as the machine tool or higher than the machine tool. On the other hand, there is a limit to the processing capacity of cutting waste from filtration devices such as magnet separators and paper filters. As a result, most of the cutting fluid in the sewage treatment tank is returned to the inflow tank without being filtered. The trouble that it ends up occurs. For this reason, it is not possible to increase the height of the cutting fluid reservoir. Furthermore, since the filtration device (filter 5 integrated with the dirty chamber 3) is not hermetically sealed (in-line type), when all of the filtration device (filter 5 integrated with the dirty chamber 3) is immersed in the cutting fluid, There is a problem that the chip removal function is significantly lowered.

  By the way, the size of the workpiece (workpiece) before processing varies, and the processing specifications are often different. For this reason, the amount (size) of the cutting waste generated from the workpiece (workpiece) processed by the machine tool is not constant. That is, the amount of sewage discharged from the machine tool (dirt cutting fluid containing cutting waste) is non-uniform. Therefore, the pump head capacity (pump drainage capacity) and the sewage water storage tank of Patent Documents 1 and 2 are a pump with a head capacity that allows for the fluctuation amount of the sewage and a sewage liquid with a surplus liquid capacity. It must be a water tank. On the other hand, the machine tool must always be supplied with a clean liquid (clean cutting liquid) without being cut. For this reason, sufficient size is calculated | required for the cutting fluid water tank of patent documents 1 and 2 (the capacity | capacitance which assumed the maximum processing amount is calculated | required), and sufficient filtration capability is calculated | required also for a filter. Become. As described above, in the conventional structures such as Patent Documents 1 and 2, a large cutting fluid reservoir is dug into the floor while taking environmental measures into consideration, and an expensive filter with high processing capacity is deployed. As a result, capital investment has become a major cause.

  Therefore, an object of the present invention is to use a filter that is not hermetically sealed (in-line type), and it is not necessary to use a sufficiently large capacity of the sewage liquid storage tank and the clean liquid storage tank, which is sufficient for the filter. There is no problem even if a non-filtration capacity is used, and the cutting fluid circulation process allows smooth circulation of the cutting fluid even if the sewage storage tank and the cleaning liquid storage tank are placed on the same floor as the machine tool. The purpose is to provide a system.

The cutting fluid circulation processing system according to the present invention that achieves the above-mentioned object supplies a clean cutting fluid (cleaning fluid) to a machine tool and filters out the dirty cutting fluid (dirt fluid) discharged from the machine tool. Is a circulating processing system for cutting fluid that is filtered by a sewage storage tank for storing sewage discharged from a machine tool, and suctioning and filtering cutting fluid containing cutting debris and metal powder from the sewage storage tank. A vortex pump pumped to the machine, a temporary water tank that adjusts the flow rate of sewage supplied to the filtration device by the vortex pump, and a clean cutting fluid (clean liquid) filtered by the filter through the temporary water tank The temporary water tank is disposed at a position higher than the dirty liquid water tank and the clean liquid water tank, and supplies a constant amount to the filter in a gravity manner.
Here, the vortex pump is also called a vortex pump, and a semi-open type impeller is retracted behind the volute part of the casing, so that foreign matter passes through the casing without any obstacles, cutting waste and This pump can smoothly push up the cutting fluid mixed with metal powder.

  Temporary storage tank that adjusts the flow rate of sewage is arranged even if the sewage mixed with cutting waste etc. is sucked up from the sewage storage tank by the above vortex pump and sent to the filtration device installed in the clean liquid storage tank. Therefore, the flow rate of the filth liquid supplied to the filter device is adjusted, and the entire filter device is not immersed in the filth solution. Also, from the moment the machine tool is discharged and stored in the sewage reservoir, there is no problem even if the eddy current pump sucks up the sewage mixed with cutting debris, so the capacity of the sewage reservoir is increased. You do n’t have to. Then, by arranging the temporary water storage tank at a higher position than the waste water storage tank and the clean liquid water storage tank, the waste liquid pumped up by the vortex pump can subsequently form a path of dropping due to gravity.

  As the present invention, the temporary water storage tank has its drain outlet positioned higher than the inlet of the filtration device, and its overflow port positioned higher than the liquid level of the sewage in the sewage water storage tank. In addition, it is preferable that an overflow channel is provided for returning the sewage exceeding the allowable amount to the sewage water storage tank.

  Sediment containing cutting waste is sucked up from the waste water storage tank by a vortex pump and sent to the temporary water storage tank, and the overflow outlet of the temporary water storage tank is positioned higher than the liquid level of the waste water in the waste water storage tank. By doing so, the sewage exceeding the water storage capacity of the temporary water tank can be returned to the sewage water tank by gravity. For this reason, the filtering device may be a filtering device having a processing capacity capable of processing an average amount of waste water from the machine tool, and it is not necessary to provide an expensive filtering device having a high processing capacity. In addition, the temporary storage tank is equipped with an overflow channel that returns the excess amount of sewage to the sewage storage tank so that the average amount of drainage from the vortex pump can be temporarily stored. Is enough.

  As the present invention, it is preferable that the cleaning liquid storage tank and the dirty liquid storage tank are provided adjacent to each other so that the overflowing cutting fluid (cleaning liquid) from the cleaning liquid storage tank flows into the dirty liquid storage tank. .

  The cutting fluid (cleaning fluid) from the cleaning fluid reservoir flows into the waste fluid reservoir, so that even if the cleaning fluid overflows from the cleaning fluid reservoir, the cutting fluid is a vortex pump. It is sucked up at and immediately sent out to the temporary water tank. And unlike the past, sewage does not enter the clean water tank.

  In the present invention, it is preferable that the waste water tank, the vortex pump, the temporary water tank, the filter, and the clean liquid water tank are housed in one housing. Furthermore, as this invention, it is preferable to provide the said housing | casing with the wheel as a moving means.

  According to the present invention, a compact cutting fluid circulation processing system that can easily cope with a layout change is realized by storing a waste water storage tank, a vortex pump, a temporary water storage tank, a filter and the like in one housing. it can. Further, by providing the casing with wheels as moving means, when changing the layout, the casing can be easily moved by the wheels without temporarily lifting the casing from the floor and moving it to another location. Can be moved.

  According to the present invention, since there is no problem in sucking up sewage mixed with cutting waste by the vortex pump from the moment when it is discharged from the machine tool and stored in the sewage storage tank, There is no need to increase the capacity. The temporary storage tank is disposed at a higher position than the sewage storage tank and the clean liquid storage tank, and supplies a certain amount of gravity to the filter in a gravitational manner, and from the filter to the clean liquid storage tank in a gravitational manner. By supplying, a fixed amount of sewage can be supplied to the filter with a simple structure and sent out to a clean water tank. Therefore, when the machine tool is placed on the floor in the factory, it becomes possible to place the waste water tank and the cleaning liquid water tank on the same floor as the machine tool, so that the cutting fluid penetrates into the floor or the ground. There are no environmental problems. Further, since the sewage exceeding the water storage capacity of the temporary water tank can be returned to the sewage water tank, the filter can be a filter having a processing capacity capable of processing an average amount of drainage from the machine tool. That is, a filter that is not hermetic can be used effectively. In addition, the clean water tank and the sewage water tank can be a water tank of a size that can store an average amount of drainage from the machine tool, and a compact water tank can be realized. For this reason, it becomes possible to respond flexibly to the layout change of the cutting fluid circulation processing system.

Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.
FIG. 1 shows a cutting fluid circulation processing system according to an embodiment of the present invention. This system 20 includes a machine tool 10, a waste water tank T1, a spare waste water tank T5, a vortex pump P1, a temporary waste water tank T2, a filter M1, and a cutting waste container W1. And a clean water tank T3, a pump P2, a coolant liquid tank T4, and a cooling device C1. Here, the machine tool 10, the sewage water tank T1, the spare sewage water tank T5, the clean liquid water tank T3, and the coolant liquid tank T4 are disposed on the floor 1. Further, the sewage water tank T1, the spare sewage water tank T5, and the clean liquid water tank T3 are arranged adjacent to each other and devised so as to have a compact design as a whole.

  The machine tool 10 performs processing such as cutting and polishing while receiving the supply of the cutting fluid. A drainage port a1 for discharging used cutting fluid (dirt fluid) containing cutting waste (metal chips and metal powder) generated during machining of the machine tool 10 is provided, and the drainage port a1 is discharged from the drainage port a1. The dirty liquid is sent out to the dirty liquid storage tank T1.

  The waste water storage tank T1 temporarily stores dirty cutting fluid (sewage liquid) discharged from the machine tool. The waste water storage tank T1 is adjacent to the waste water storage tank T1 and clean. A liquid water tank T3 is disposed on the floor 1. The spare septic tank T5 is provided as a precaution in the event that the septic tank T1 overflows with sewage. The overflow port b3 of the dirty water tank is arranged at a position higher than the liquid level c5 of the spare dirty water tank. And the cooling fluid storage tank T4 is arrange | positioned adjacent to the floor so that it may continue with the cleaning fluid storage tank T3. The cutting fluid in the cooling fluid reservoir T4 is cooled by the cooling device C1 to become a cooled cutting fluid (coolant fluid).

  A vortex pump P1 is disposed in the sewage water storage tank T1, and the sewage temporarily stored is immediately pumped up. This vortex pump P1 is also called a vortex pump, and is a pump that energizes and lifts liquid by a vortex generated by an impeller having several blades. The impeller directly passes through the liquid passage (flow path). Therefore, the cutting fluid mixed with cutting waste and metal powder can be pushed up smoothly. In other words, the vortex pump P1 is a pump that pumps up water mixed with earth and sand at a construction site or the like, and applies it to the cutting fluid pumping application. For this reason, the sewage mixed with cutting waste, metal chips, metal powder, etc. can be sucked up as it is from the sewage water storage tank T1 by the vortex pump P1 and sent out to the temporary water storage tank T2 via the pipe R1.

  The temporary storage tank T2 temporarily stores the used cutting fluid pumped up from the dirty liquid storage tank T1 immediately before being supplied to the filtration device M1, adjusts the flow rate thereof, and supplies it to the filtration device M1. A baffle tank is used. The temporary water tank T2 is provided with a drain port a2 near the bottom and an overflow port b1 near the top, and the spilled liquid is returned to the sewage water tank T1 in a gravitational manner via the overflow channel R2. To do. In addition, by using an orifice for the drainage port a2, even when used cutting fluid exceeding the allowable flow rate of the filtration device M1 is supplied from the vortex pump P1, the used cutting is once performed in the dirty water storage tank T1. The liquid is stored, and among these, the used cutting fluid can be supplied to the filtering device M1 within the allowable flow rate range of the filtering device M1. As a result, the used cutting fluid does not become excessively supplied, and the used cutting fluid can be efficiently filtered without reducing the chip processing capacity of the filtering device M1. A part of the upper portion of the temporary water tank T2 is opened, so that a certain amount of sewage is always sent out from the drainage port a2 by gravity to the filtration device M1 by the atmospheric pressure. Therefore, the filtering device M1 may be a filtering device having a processing capacity capable of processing an average amount of waste water from the machine tool, and it is not necessary to provide an expensive filtering device having a high processing capacity. Further, the temporary water storage tank T2 may be a temporary water storage tank T2 having a size capable of temporarily storing an average amount of drainage from the vortex pump P1, and does not need to be sealed (inline).

  The filter M1 is not an expensive hermetically sealed type but is called a magnet separator. The magnetic separator is a device that removes magnetic cutting scraps, metal powder, and the like and cleans the sewage, and is effective in removing cutting scraps generated when processing iron-based parts such as automobile parts. Further, as non-sealing type, for example, in addition to a magnetic separator that removes magnetic cutting waste, a centrifugal separator that removes non-magnetic cutting waste, magnetic Filters such as a paper filter and a hydrocyclone for removing non-magnetic sludge can be used singly or in combination. Even when such a non-sealing filter M1 is used, the filter M1 is not completely immersed in the cutting fluid due to the adjustment by the drainage port a2. The filter M1 discharges clean cutting fluid from the drainage port a3 provided on the bottom side thereof in a gravity manner, and also removes cutting waste, metal powder, etc. removed from the waste liquid and discards it in the cutting waste storage W1. To do. Although not shown in figure, the cutting waste container W1 can be conveyed by the caster provided in the bottom part.

  The clean liquid storage tank T3 stores the filtered clean cutting liquid (clean liquid), and is disposed below the filtering device M1. That is, it arrange | positions so that the filter M1 may be piled up on the clean liquid storage tank T3, and it arrange | positions so that the temporary water tank T2 may be piled up on the filter M1, and cleans and sends out filth liquid by gravity. The cutting fluid (cleaning fluid) in the cleaning fluid reservoir T3 is supplied to the machine tool 10 through the pipe R3. The cleaning liquid reservoir T3 is adjacent to the dirty liquid storage tank T1, and the cutting fluid (cleaning liquid) from the cleaning liquid storage tank T3 flows into the dirty liquid storage tank T1 through the overflow port b2. Yes.

  Therefore, according to the present embodiment, the sewage discharged from the drainage port a1 of the machine tool 10 (cutting fluid L containing cutting waste X) flows into the sewage reservoir T1 from the above configuration. The sewage flowing into the sewage reservoir T1 is immediately pumped up by the vortex pump P1 and sent out to the temporary reservoir T2.

  In the temporary water tank T2, a predetermined amount is supplied to the filter M1 in a gravity manner by passing through the drainage port a2. Here, when the amount of sewage temporarily increases suddenly due to fluctuations in the amount of workpiece processed by the machine tool 10, etc., and sewage exceeding the amount of water stored in the temporary water tank T2 flows into the temporary water tank T2. Since the sewage is returned from the overflow port b1 to the sewage water storage tank T1, there is no fear that the sewage overflows into the temporary water storage tank T2. Then, the returned sewage is also immediately sent to the temporary water tank T2 by the vortex pump P1. In addition, since the spare sewage water storage tank T5 is arrange | positioned, even if sewage overflows, it is sent to the spare sewage water storage tank T5 from the overflow port b3. For this reason, the temporary water tank T2 only needs to have a processing capacity capable of processing an average amount of drainage from the machine tool.

  The sewage supplied to the filter M1 by the vortex pump P1 is separated into the cutting waste X and the cutting fluid L, and the cutting waste X is collected in the cutting waste tray W1. The cutting fluid L, which is in a clean state with no cutting waste X, flows into the cleaning fluid reservoir T3 from the drainage port a3 provided in the filter M1 by a gravity method.

  Since the cutting fluid L that has flowed into the cleaning fluid reservoir T3 is at a high temperature due to frictional heat between the blade of the machine tool 10 and the workpiece, the cooling fluid reservoir T4 adjacent to the cleaning fluid reservoir T3 is provided with cooling. Cooled by machine C1. Then, after flowing into the cleaning liquid storage tank T3, the cooled cutting fluid L is pumped up by the vortex pump P2 and supplied to the workpiece processing place of the machine tool 10 via the pipe R3.

  Here, the overflow port b2 of the clean liquid storage tank T3 is disposed at a position higher than the liquid level c1 of the dirty liquid storage tank T1, and the overflow port b3 of the dirty liquid storage tank T1 is a spare dirty water storage tank. It arrange | positions in the position higher than the liquid level c5 of T5. That is, the cutting fluid L exceeding the water storage capacity of the clean liquid water storage tank T3 is returned to the waste water storage tank T1, and further the cutting liquid L exceeding the water storage capacity of the liquid waste water storage tank T1 is stored as a spare liquid waste water storage. Returned to tank T5. For this reason, since the clean water tank T3 and the dirty water tank T1 can be accommodated by a water tank of a size capable of storing an average amount of drainage from the machine tool 10, a compact water tank can be realized. Moreover, the filter M1 and the temporary water tank T2 need only have a processing capacity capable of processing an average amount of drainage from the machine tool.

  Next, FIG. 2 shows a cutting fluid circulation processing system according to another embodiment of the present invention. The cutting fluid circulation processing system shown in FIG. 2 includes a spare sewage water tank T5, a sewage water tank T1, a vortex pump P1, a temporary water tank T2, a filter M1, a clean liquid water tank T3, and a coolant water tank. T4 and the cooler C1 are housed in one housing 21. The housing 21 is provided with four wheels y as moving means. As described above, the cutting waste bin W1 is not included in the one casing 21 because it can be transported by a caster provided at the bottom thereof.

  With the above configuration, it is possible to realize a compact cutting fluid circulation processing system that can easily cope with a layout change of the machine tool 10 due to a production item change or the like. Further, by providing the casing 21 with four wheels y as moving means, the casing 21 can be easily moved when the layout is changed.

  Thus, this cutting fluid circulation processing system includes the waste water storage tank T1, the spare waste water storage tank T5, the vortex pump P1, the temporary waste water storage tank T2, the filter M1, and the clean water storage tank T3. By arranging the pump P2, the coolant reservoir T4, and the cooling device C1 on the floor and housed in one housing 21, the layout can be easily changed and the circulation of the cutting fluid can be made smooth. .

  As described above, the present invention is not limited to the embodiment described above. For example, in order to facilitate regular maintenance, a spare water tank T5, a sewage water tank T1, a vortex pump P1, a filter M1, a pump P2, and the like may be detachable. Thus, it goes without saying that the present invention can be modified as appropriate without departing from the spirit of the present invention.

It is an arrangement plan of a cutting fluid circulation processing system shown as an embodiment of the present invention. It is an arrangement plan of a cutting fluid circulation processing system shown as an embodiment of the present invention. The layout of the conventional cutting fluid circulation processing system is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor 10 Machine tool 20 Circulation processing system 21 of cutting fluid Case M1 Filter P1 Eddy current type pump P2 Pump R1 Overflow channel T1 Sewage water tank T2 Temporary water tank T3 Clean liquid water tank T4 Coolant water tank T5 Reserve Waste water storage tank W1 Cutting waste container X Cutting waste L Cutting fluid a1, a2, a3 Drainage port b1, b2, b3 Overflow port c1, c5 Liquid level

Claims (5)

A cutting fluid circulation processing system that supplies clean cutting fluid (cleaning fluid) to a machine tool and filters dirty cutting fluid (dirt fluid) discharged from the machine tool through a filter.
A sewage storage tank that stores the sewage discharged from the machine tool, a vortex pump that draws out cutting fluid including metal chips and metal powder from the sewage storage tank, and sends it to the filter. A temporary water storage tank that adjusts the flow rate of the sewage supplied to the apparatus, and a clean water storage tank that stores clean cutting fluid (clean liquid) filtered by a filter through the temporary water storage tank. Is a circulating processing system for cutting fluid, which is arranged at a position higher than the waste water storage tank and the cleaning liquid water storage tank, and supplies a constant amount to the filter in a gravity manner.   The temporary water tank has its drain outlet positioned higher than the inlet of the filtration device, its overflow port positioned higher than the liquid level of the sewage water tank, and its allowable amount The cutting fluid circulation processing system according to claim 1, wherein an overflow channel is provided for returning the excess sewage to the sewage reservoir.   The cleaning liquid storage tank and the dirty liquid storage tank are provided adjacent to each other, and the overflowing cutting fluid (cleaning liquid) from the cleaning liquid storage tank flows into the dirty liquid storage tank. The cutting fluid circulation processing system according to claim 1 or 2.   4. The cutting fluid circulation processing system according to claim 3, wherein the waste water storage tank, the vortex pump, the temporary water storage tank, the filter, and the cleaning liquid water storage tank are housed in one casing. . 5. The cutting fluid circulation processing system according to claim 4, wherein the casing is provided with wheels as moving means.

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