KR20060078122A - Device for filtering chips in oil of cutting machine and there of method for washing a filter - Google Patents

Abstract

The present invention is a magnetic filtration means for separating the chips into the magnetic in the storage unit flowing cutting oil into the pipe, the cutting oil is passed through the magnetic filtration means is stored, dirty tank having a pressure pump for sending to the other filtration unit through the pipe, dirty tank When the pressurized pump is operated and the cutting oil is supplied, a filtration tank having a centrifugal separator separating the chips of the cutting oil by centrifugal force and a filter filtration section separating and discharging the chips by the filtration filter, pressurizing the cutting oil filtered from the filtration tank If the filter filtering portion of the clean tank and the filtration tank to be re-supplied to the blockage is blocked, it comprises a back washing means for washing the filtration filter by supplying the air supplied from the predetermined air supply with the cutting oil pressurized by the clean pump to the filtration filter. .

Magnetic filtration means, dirty tank, filtration tank, solenoid valve, backwash step

Description

DEVICE FOR FILTERING CHIPS IN OIL OF CUTTING MACHINE AND THERE OF METHOD FOR WASHING A FILTER}

1 is a front view showing a chip filtration device using a conventional filtration filter.

2 is a diagram illustrating a system diagram of a chip filtration device for cutting oil according to an embodiment of the present invention.

3 is a view showing a filtration tank of a chip filtration device of cutting oil according to an embodiment of the present invention.

Figure 4 is a block diagram showing a backwashing method of the chip filtration device of the cutting oil according to an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

100: magnetic filtration means 110: storage unit

115: magnetic 120: dirty tank

122: water level sensor 125: pressure pump

127: check valve 130: filtration tank

140: centrifuge 142: connector

150: filter filtration unit 152: perforated plate

155: filtration filter 157: discharge pipe

170: clean tank 175: clean pump

180: air supply section 190: first solenoid valve

192: second solenoid valve 195: third solenoid valve

200: fourth solenoid valve 210: fifth solenoid valve

220: control unit 225: pressure switch

227: timer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip filtration apparatus for cutting oil for filtering chips or sludges contained in cutting oil discharged from various machine tools, and a backwashing method thereof. The filtration method can be mixed to maximize the filtration effect, while automatically detecting the clogging phenomenon of the filtration filter and changing the flow direction of the cutting oil to supply air to the upper and lower parts of the filtration filter. The present invention relates to a chip filtration device for cutting oil and a backwashing method for maximizing the effect of reducing maintenance costs by smoothing the clogging of the filter and enabling the filtration to be performed smoothly.

In general, the cutting oil used in the machine tool includes a large amount of metallic or nonmetallic chips and sludge. In order to reuse the cutting oil, conventionally, a method of filtering metallic chips by magnetic force or a filtration method using a filtration filter is used. Came by.

In the past, however, metallic workpieces were the mainstream, but with the development of modern industry, the workpieces contain non-metallics, which limits the use of magnetic materials.In the case of cutting oils containing metallic, non-metallic chips and sludge, the filtration filter Filtration by is more effective.

In the filtration operation by the filtration filter, as shown in FIG. 1, the cutting oil is introduced into the filtration filter 2 by providing the filtration filter 2 inside the receiving body 1 to accommodate a predetermined cutting oil. In this way, the cutting oil passes through the filtration filter 2, and chips or sludge remain or are laminated to the filtration filter 2 to obtain clean cutting oil.

However, the filtration device of the filtration filter 2 has a problem in that the manufacturing operation is very simple while damaging the filtration filter 2 as chips having large particles are stacked inside the filtration filter 2. Likewise, when damage is applied to the filtration filter 2, chips of smaller particles pass through the damage site and are included in the cutting oil again, thereby lowering the filtration effect.

In addition, when a large amount of chips are stacked in the filtration filter 2 and the filtration effect is reduced, the filtration filter 2 needs to be replaced. The exchange time varies slightly depending on the amount of use. There is a hassle, and there is a problem that the maintenance cost is increased by frequently replacing the expensive filtration filter (2).

In addition, in order to replace the filtration filter 2, the assembly has to be dismantled and the filtration filter 2 has to be replaced.

The present invention devised to solve the above problems can be mixed with the filtration method using a magnetic material and the filtration method using a filtration filter to first filter the chips of large particles that damage the filtration filter, fine chips or non-metal chips They can be sedimented by the centrifugal separator and filtered and filtered by the filtration filter, and at the same time, it automatically detects the amount of chips or sludge attached to the outer surface of the filtration filter and automatically filters the filter when clogging occurs. The chip can be removed from the filter and re-supply to the dirty tank so that it can be filtered again from the beginning, preventing damage to the filter and eliminating clogging immediately. It also serves the purpose of reducing maintenance costs.

The configuration of the chip filtration device of the cutting oil according to the present invention for achieving the above object is provided with a storage for the cutting oil used in the cutting operation of the cutting machine flows into the tube, the magnetic separating the chip from the cutting oil of the storage magnetic When the coolant passing through the filtration means and the magnetic filtration means is stored, the dirty tank having a pressurizing pump for sending to the other filtration part through a pipe, and the pressurized pump of the dirty tank is operated to supply the cutting oil, the centrifugal force to cut the chips of the cutting oil. A filtration tank having a centrifugal separator separated and introduced into a storage unit of the magnetic filtration means, and a filtration tank having a filter filtration unit for separating and discharging chips into a filtration filter when the cutting oil supplied through the centrifugal separator is supplied, and the cutting oil filtered from the filtration tank. Is stored, pressurize the coolant with a clean pump and resupply it to the cutting machine. The clean tank and the filter filtration unit of the filtration tank, the filter comprising a back washing means for washing the filtration filter by supplying the air supplied from the predetermined air supply with the cutting oil pressurized in the clean pump to the filtration filter Has

In addition, the configuration of the backwashing method of the chip filtration device for cutting oil according to the present invention includes a first solenoid provided to a pipe connecting a centrifugal separation unit for stopping the pressurized pump of the dirty tank in which the cutting oil is stored and separating the chip by the centrifugal force from the dirty tank. A cutting oil returning step of opening the valve to allow the cutting oil of the centrifugal separator to flow into the dirty tank, and a filter for blocking a second solenoid valve provided at a lower portion of the discharge pipe through which the cutting oil is introduced into the clean tank from the filter filtration part after the cutting oil returning step. Filtration to block the filter, after the filter filter blocking step to open the third solenoid valve provided in the pipe connecting the discharge pipe and the clean tank with the stored cutting oil filtered to allow the cutting oil flow from the clean tank into the filter filter unit Coolant supply step and external after the filtered coolant supply step Air to supply air to the lower part of the filter filtration part and the fourth solenoid valve provided in the pipe connecting the filter filtration part to supply air to the lower part of the filter filtration part together with the supplied filtration cutting oil of the clean tank. It is characterized by including the supply stage.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

In addition, the present embodiment is not intended to limit the scope of the present invention but is merely presented as an example, and there may be various embodiments implemented through the technical idea.

2 is a diagram showing a schematic diagram of a chip filtration device for cutting oil according to an embodiment of the present invention, Figure 3 is a view showing a filtration tank of the chip filtration device for cutting oil according to an embodiment of the present invention, Figure 4 A block diagram illustrating a backwashing method of a chip filtration device for cutting oil according to an embodiment of the present invention.

As shown in Figures 2 and 3, the chip filtration device of the cutting oil according to an embodiment of the present invention includes a storage unit 110 is introduced into the pipe cutting oil used in the cutting operation of the cutting machine, the storage unit ( Magnetic 120 filter means 100 for separating the chip from the cutting oil of the 110 to the magnetic 120 and the cutting oil passed through the magnetic filter 120 filter means 100 is stored, and pressurized for sending to other filtering through the pipe And a dirty tank 120 having a pump 125. When the pressurized pump 125 of the dirty tank 120 is operated and the cutting oil is supplied, the chips of the cutting oil are separated by centrifugal force to filter the magnetic 120. And a centrifugal separator 140 for flowing into the storage unit 110 of the means 100, and when cutting oil is supplied through the centrifugal separator 140, the filter is separated and discharged through the filtration filter 155. Filtration tank 130 having a portion 150, to the filtration tank 130 When the filtered cutting oil is stored, the clean tank 170 pressurizing the cutting oil with the clean pump 175 and supplying the cutting oil to the cutting machine and the filter filtration unit 150 of the filtering tank 130 are blocked, the clean pump 175 And backwashing means for supplying the air supplied from the predetermined air supply unit 180 together with the cutting oil pressurized to the filtration filter 155 to wash the filtration filter 155.

Here, the filtration tank 130 receives the cutting oil in the tangential direction by the pressure pump 125 and discharges the chips contained in the cutting oil downward by the difference in centrifugal force and specific gravity to form the centrifugal separator 140. The filtration filter 155 disposed above the tank 130a and the lower tank 130a to receive the cutting oil pressurized by the centrifugal force to the connection pipe 142, and the cutting oil supplied to the connection pipe 142 is filtered. And an upper tank 130b having a discharge pipe 157 for discharging the cutting oil passing through the filtration filter 155 to the clean tank 170 to form the filter filtration unit 150. .

At this time, the magnetic filter 120 filter means 100 by separating the coarse metal chip which can be separated by the magnetic force from the cutting oil discharged to the storage unit 110 through the cutting operation of the cutting machine to discharge the dirty tank ( The cutting oil introduced into 120 may include a small metal chip or a non-metal chip.

In addition, the dirty tank 120 is a portion in which the cutting oil filtered by the coarse metal chip is stored and stored by the magnetic filter 120, and the pressurizing pump 125 pressurizes the cutting oil to the filtration tank 130. And a water level sensor 122 for measuring the level of the cutting oil, thereby preventing the cutting oil from flowing before the cutting oil overflows.

In addition, the pressure pump 125 supplies the cutting oil pressurized through the pipe 191 connected to the centrifugal separator 140 to one side of the centrifugal separator 140, and the centrifuge 140 to the pipe 191. Is provided with a check valve 127 for preventing the back flow of the cutting oil to the pressure pump (125).

At this time, the centrifuge 140 receives the cutting oil pressurized by the pressure pump 125, the cutting oil forms a vortex in the centrifuge 140. That is, the chips heavier than the cutting oil in the cutting oil supplied to the centrifugal separator 140 are settled down the discharge of the centrifugal separator 140.

Here, the filter filtration unit 150 is provided at the top of the centrifuge 140, the centrifuge 140 and the filter filtration unit 150 is connected by a connecting pipe 142. The connection pipe 142 provides a passage through which the cutting oil having passed through the centrifugal separation unit 140 flows to the filter filtration unit 150, and the cutting oil introduced into the filter filtration unit 150 is formed in the filter filtration unit 150. Through the filtration filter 155 to the inside of the filter filtration unit 150, fine chips are filtered out of the filtration filter 155.

In addition, the cutting oil passing through the filtration filter 155 flows into the clean tank 170 through the discharge pipe 157 and is stored. Here, the clean tank 170 is a cutting oil in which chips are filtered by the magnetic filter 120, the filtration filter 155, and the centrifugal separator 140. The clean tank 170 is supplied to the cutting machine by the clean pump 175. It is used to cool the frictional heat of the cutting material during the cutting operation.

As described above, the cutting oil is subjected to a series of filtration processes through the magnetic filter 120, the dirty tank 120, the centrifugal separator 140, the filter filter 150, and the clean tank 170 in the cutting machine. When finished and re-supplied to the cutting machine, the gap through which the cutting oil of the filtration filter 155 flows is blocked by the cutting chip, so that the filtration function of the filtration filter 155 does not function properly.

In this case, the backwashing means is to flow the cutting oil filtered from the inside of the filtration filter 155 to the outside to block the clogging of the filtration filter 155, the backwashing means is the filtration tank in the pressure pump 125 The first solenoid valve 190 provided in the pipe 193 branching from the pipe 191 connected to the centrifugal separator 140 of the 130 to the dirty tank 120, the filter filtration unit of the filtration tank 130 A second solenoid valve 192 provided to the discharge pipe 157, a pipe 194 of the clean pump 175 to block the flow of cutting oil discharged from the 150 to the clean tank 170, the filtration tank ( A third solenoid valve 195 provided in the pipe 197 branched to the discharge pipe 157 of 130 and a check valve 196 for preventing a backflow from the discharge pipe 157 to the third solenoid valve 195. Include.

In addition, the backwashing means includes an air supply unit 180 for supplying air through the perforated plate 152 provided above and below the filtration filter 155 of the filter filtration unit 150. At this time, the perforated plate 152 is changed into a lot of air bubbles injected into the lower portion of the filter filter 155 in the air supply unit 180 to be introduced into the interior of the filter filter 155, to the filter filter 155 The injected air passes from the inside of the filtration filter 155 to the outside. At this time, the air supply unit 180 is connected to the upper and lower parts of the filtration filter 155 to open and close the air supply to the upper and lower parts of the filtration filter 155, the fourth and fifth solenoid valves 200, 210 is provided.

In addition, the backwashing means causes the first solenoid valve 190 to be closed, the second solenoid valve 192 to be opened, and the third solenoid valve 195 to be opened, and the fourth And a control unit 220 for removing the clogging of the filtration filter 155 by sequentially opening the 5 solenoid valves 200 and 210.

At this time, the backwashing means includes a pressure switch 225 for operating the control unit 220 by detecting the clogging pressure on the filtration filter 155 of the filter filtration unit 150, the control unit 220 It includes a timer 227 to operate at predetermined time intervals to clean the filtration filter 155.

That is, the controller 220 of the backwashing means automatically washes the filtration filter 155 by a pressure switch, or washes the filtration filter 155 while operating at a predetermined interval by the timer 227 to filter the filtration filter 155. ) Can eliminate the blockage.

The control unit 220 of the backwashing means is blocked by the filtration filter 155, the pressure of the filter filtration unit 150 is high, the pressure switch is activated to detect this to stop the operation of the pressure pump 125 to centrifuge The supply of cutting oil to the 140 is cut off, and the first solenoid valve 190 is opened to allow the cutting oil in the filter filtration unit 150 to flow into the dirty tank 120.

The control unit 220 closes the second solenoid valve 192 to block the flow of cutting oil from the filtration filter 155 to the clean tank 170, and opens the third solenoid valve 195 to clean the tank. Cutting oil pressurized by the clean pump 175 at 170 is introduced into the filtration filter 155 through the discharge pipe 157, and air is supplied from the air supply unit 180 to the lower portion of the filtration filter 155. Open the fourth solenoid valve 200 to be supplied. At this time, the cutting oil and air is supplied through the perforated plate 152 disposed below the filtration filter 155 and flows into the filtration filter 155 to flow from the inside of the filtration filter 155 to the filtration filter. Chips or sludge sandwiched in the filtration gap of (155) is to be separated to the outside of the filtration filter (155).

Lastly, the control unit 220 opens the fifth solenoid valve 210 for supplying additional air from the air supply unit 180 to the upper portion of the filtration filter 155, and provides a perforated plate provided on the filtration filter 155. By supplying air into the filtration filter 155 through the 152, the air is pressurized by the cutting oil supplied into the filtration filter 155 to pass the filtration filter 155 from the inside to the outside. At this time, the air is changed to a large number of small air bubbles through the perforated plate 152 is very effective to separate the fine chip that provided the blockage of the filter filter 155, the air bubbles when passing through the filter filter 155 The fine chip is caused to fall out of the filtration filter 155 by the popping pressure.

In addition, the cutting oil washing the filtration filter 155 flows back through the connection pipe 142, including the chip, into the centrifuge 140, and the dirty tank 120 at the top of the centrifuge 140. Inflow into the dirty tank 120 through the pipe connected to the flow, and flows to the storage unit 110 through the tube connected to the storage unit 110 of the filter unit 100 of the magnetic 120 at the bottom of the centrifuge 140 do.

That is, the chip separated from the filtration filter 155 is introduced into the magnetic filter 120 and the dirty tank 120 in accordance with the specific gravity in the centrifugal separator 140 and undergoes the filtration process again, the filtration The filter 155 is washed by the filtered coolant backflowed from the clean tank 170.

Then, the control unit 220 flows back the cutting oil filtered by the filtration filter 155 in the clean tank 170 for a predetermined time, and supplies the air to the filtration filter 155 to finish the cleaning of the filtration filter 155, By closing the solenoid valves in reverse order, the coolant is normally filtered as described above.

Hereinafter, a method of backwashing a chip filtration device for cutting oil according to an embodiment of the present invention will be described with reference to the chip filtration device for cutting oil.

As shown in Figure 2, 4, the backwashing method of the chip filtration device of the cutting oil according to an embodiment of the present invention stops the pressurized pump 125 of the dirty tank 120, the cutting oil is stored, dirty tank 120 To open the first solenoid valve 190 provided in the pipe connecting the centrifugal separation unit 140 separating the chips by centrifugal force so that the cutting oil of the centrifugal separation 140 flows into the dirty tank 120. Cutting oil return step 230, after the cutting oil return step 230 to block the second solenoid valve 192 provided in the lower portion of the discharge pipe 157 for introducing the cutting oil from the filter filtration unit 150 to the clean tank 170 After the filter filtration block blocking step 240 and the filter filtration block blocking step 240, the third solenoid valve 195 provided to the pipe connecting the discharge pipe 157 and the clean tank 170 storing the filtered cutting oil is opened. The filter filtration unit 150 in a clean tank 170 An air supply unit 180 and an air filter unit 180 for supplying air to the lower part of the filter filtration unit 150 from the outside after the filtration cutting oil supply step 250 and the filtration cutting oil supply step 250 to allow the cutting oil to flow therein ( Air supply step of supplying air to the lower portion of the filter filtration unit 150 with the filtration cutting oil supplied to the clean tank 170 by opening the fourth solenoid valve 200 provided in the pipe connecting the 150 ( 260).

Here, in the cutting oil return step 230, the filtration filter 155 is blocked, the pressure of the filter filtration unit 150 is increased, and when the pressure switch is operated, it detects this and stops the operation of the pressure pump 125 so that the centrifugal separator The supply of cutting oil to the 140 is cut off, and the first solenoid valve 190 is opened to allow the cutting oil in the filter filtration unit 150 to flow into the dirty tank 120.

In addition, the filter filtration block blocking step 240 blocks cutting oil from flowing from the filter filtration unit 150 to the clean tank 170, and the filtration cutting oil supplying step 250 is filtered out of the clean tank 170. Cutting oil is flowed back to the filter filtration unit 150, and the air supply step 260 is a filter filter (through the perforated plate 152 provided in the lower portion of the filter filter 155 with air back flow) 155).

At this time, the cutting oil flows into the filtration filter 155 together with the air to separate the chip blocking the gap of the filtration filter 155 on the outer surface of the filtration filter 155 from the filtration filter 155 to filter the filter ( Through the connection pipe 142 connecting the 150 and the centrifugal separator 140 is introduced into the dirty tank 120 and the magnetic filtration means 100.

In addition, after the air supply step 260, the fifth solenoid valve 210 provided in the pipe for supplying air to the upper part of the filter filtration part 150 is opened to supply air to the upper part of the filter filtration part 150. An air addition step 270 for supplying is included.

In this case, the air addition step 270 is to supply air from the upper portion of the filter filter 155 to allow the air to pass through the filter filter 155 in the reverse direction with the cutting oil, the gap is caught in the outer surface of the filter filter 155 The chip blocking the separation is to be separated from the filter 155.

According to the present invention configured as described above, the filtration method using the magnetic material and the filtration method using the filtration filter can be mixed to filter the chips of large particles damaging the filtration filter, and the fine chips or the non-metallic chips are used in the centrifugal separator. By sedimenting and filtering by filtration filter, and automatically detect the amount of chips or sludge adhered to the outer surface of filtration filter and automatically wash the filtration filter when clogging occurs. By allowing the sludge to be removed from the filter and re-supplied to the dirty tank so that it can be filtered again from the beginning, the filter can be prevented from being damaged and the clogging can be immediately eliminated, allowing the filter to be used for a long time. The effect is to reduce the management cost.

Claims (8)

Magnetic filtration means having a storage unit for the cutting oil used in the cutting operation of the cutting machine flows into the tube, and separating the chips from the cutting oil of the storage unit magnetically; A dirty tank in which cutting oil having passed through the magnetic filtration means is stored, and having a pressurized pump for sending to the other filtration unit through a pipe; When the pressurized pump of the dirty tank is operated and the cutting oil is supplied, the centrifugal separator separates the chips of the cutting oil by centrifugal force and introduces the chips into the storage part of the magnetic filtration means. A filtration tank having a filter filtration unit for separating and discharging it; A clean tank for pressurizing the cutting oil with a clean pump and resupplying the cutting oil when the cutting oil filtered in the filtration tank is stored; And And a backwashing means for supplying air supplied from a predetermined air supply part to the filtration filter together with the cutting oil pressurized by the clean pump when the filter filtration part of the filtration tank is blocked, and washing the filtration filter. Chip filtration device. The method of claim 1, The filtration tank is a lower tank for supplying the cutting oil in the tangential direction by the pressure pump to discharge the chip included in the cutting oil to the lower side by the difference in centrifugal force and specific gravity to form the centrifugal separator; And The cutting tank disposed above the lower tank and supplied with the cutting oil pressurized by the centrifugal force to the connection pipe, and has the filtration filter inside which the cutting oil supplied to the connection pipe is filtered, and the cutting oil passing through the filtration filter in the clean tank. Chip filtration device for cutting oil, characterized in that it comprises an upper tank comprising a discharge pipe for discharging to the filter filtration unit. The method of claim 2, The upper tank of the filtration tank chip cutting device for cutting oil, characterized in that it comprises a perforated plate for generating air bubbles into the interior of the filter when the air is injected from the outside. The method of claim 1, The backwashing means may include: a first solenoid valve provided to a pipe branching from the pressure pump to the dirty tank in a pipe connected to the centrifugal separator of the filtration tank; A second solenoid valve provided in the discharge pipe to block the flow of cutting oil discharged from the filter filtration part of the filtration tank to the clean tank; A third solenoid valve provided on a pipe branched from the pipe of the clean pump to the discharge pipe of the filtration tank; An air supply unit supplying air to upper and lower filtration filters of the filter filtration unit; Fourth and fifth solenoid valves provided to pipes connected to upper and lower parts of the filtration filter so as to open and close the air supply to the upper and lower parts of the filtration filter at the air supply part; And The first solenoid valve is closed, the second solenoid valve is opened, the third solenoid valve is opened, and the fourth and fifth solenoid valves are opened in order to remove clogging of the filtration filter. Chip filtration device of the cutting oil comprising a control unit. The method of claim 4, wherein The backwashing means is a chip filtration device for cutting oil, characterized in that it comprises a pressure switch for operating the control unit by detecting the clogging pressure on the filter filter of the filter filtration unit. The method of claim 4, wherein The backwashing means is a chip filtration device for cutting oil, characterized in that it comprises a timer to operate the control unit at predetermined time intervals to wash the filtration filter. Cutting oil for stopping the pressurized pump of the dirty tank in which the cutting oil is stored and opening the first solenoid valve provided in the pipe connecting the centrifugal separating part to separate the chip by the centrifugal force from the dirty tank to allow the cutting oil of the centrifugal separator to flow into the dirty tank. Recovery step; A filter filtration block blocking step of blocking a second solenoid valve provided at a lower portion of a discharge pipe through which cutting oil is introduced into the clean tank from the filter filtration unit after the cutting oil returning step; A filter cutting oil supplying step of cutting oil flowing from the clean tank into the filter filtration unit by opening a third solenoid valve provided to a pipe connecting the discharge pipe and the clean tank in which the filtered cutting oil is stored after the filter filtration unit blocking step; And After the filter cutting oil supply step, by opening the air solenoid valve for supplying air to the lower part of the filter filtration unit from the outside and the fourth solenoid valve provided in the pipe connecting the filter filtration unit, the filter filtration unit together with the supplied filtration cutting oil of the clean tank. And an air supply step of supplying air to the lower part. The method of claim 7, wherein The air supply step may include an air addition step of supplying air to the upper part of the filter filtration unit by opening a fifth solenoid valve provided in a pipe supplying air to the upper part of the filter filtration unit. How to wash.

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