KR20010054794A - Chip filter apparatus of cutting oil and method thereof - Google Patents

Abstract

PURPOSE: A chip filtering method for cutting oil and a filtering device thereof are provided to prevent the damage of a filtering fabric and to reduce a maintenance cost by first filtering large particles of chips using a magnetic body and secondly filtering fine chips or non-metal chips using the filtering fabric and by automatically cleansing the filtering fabric when large amount of chips or sludge are attached to the filtering fabric. CONSTITUTION: To filter the chips of cutting coil, cutting oil is collected in a dirty tank and chips or sludge are first filtered by a magnetic body and discharged to a chip box through a scraper. Then, the cutting oil is secondly filtered by a first and a second filtering fabric and re-fed to a pump room. When the holes of the filtering fabric are bridged by diatomite, the filtered cutting oil is collected in a clean tank. A system measures the pressure of the filtering fabric to sense the clogging of the filtering fabric. When the pressures is less than a set value, the cutting oil is re-fed to all kinds of machine tools or a cutting oil storage tank. When the pressure is more than or the same as the set value, the direction of the cutting oil is controlled to remove the clogging of the filtering fabric and to re-feed the cutting oil to the pump room. After that, the filtering fabric filters chips or sludge again.

Description

Chip filtration device for cutting oil and its method {CHIP FILTER APPARATUS OF CUTTING OIL AND METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip filtration method and apparatus for cutting oil for filtering chips or sludges contained in cutting oil discharged from various machine tools. Filtration method using) and filtration method using follicles can be mixed to maximize the filtration effect, while automatically detecting the clogging phenomenon of the follicles and changing the flow direction of the cutting oil. The present invention relates to a chip filtration method and apparatus for cutting oil, which can maximize the effect of reducing maintenance costs and facilitate filtration.

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 by follicles has been used.

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. Filtration is more effective.

As the filtration operation by the follicles, as shown in FIG. 1, the follicles 2 are embedded in the accommodating main body 1 to accommodate a predetermined cutting fluid so that the cutting oil may flow into the follicles 2, The cutting oil passes through the follicle 2 and chips or sludges remain or are laminated to the follicle 2 so as to obtain clean cutting oil.

However, the filtration device by the follicle 2 has a problem that the manufacturing operation is very simple, while the chips having large particles are laminated inside the follicle 2, thereby damaging the follicle 2, as described above. When damage is applied), chips of smaller particles pass through the damaged portion 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 follicle 2 and the filtering effect is lowered, the follicle 2 should be replaced. However, the exchange time varies slightly depending on the amount of use. In addition, there is a problem that the maintenance cost is increased by frequently exchanging expensive follicles 2.

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

The present invention has been made in order to solve the above problems can be mixed with a filtration method using a magnetic material and a filtration method using a follicle to filter the large particles of chips that damage the follicles and fine chips or non-metal The sex chips can be filtered by the follicles and at the same time automatically detect the amount of chips or sludges attached to the outer surface of the follicles, and when the clogging occurs, the chips are automatically washed to remove the chips or sludges from the follicles. By resupplying to the dirty tank and allowing it to be filtered again from the beginning, the follicles can be prevented from being damaged and the clogging can be eliminated immediately, allowing the follicles to be used for long periods of time and reducing maintenance costs. Serve the purpose of doing so.

In order to achieve the above object, the present invention provides a process for collecting cutting oil discharged from various machine tools into a dirty tank, and a chip or sludge of the cutting oil collected by the supply process by magnetic force. The magnetic filtration process of primary filtration, the chip discharge process which discharges the chip and sludge filtered by the said magnetic filtration process to a chip box by the scraper attached to a conveyor, and the magnetic filtration process collect | collected in the pump room Filtration preparation process is performed for a predetermined time so that the cutting oil is supplied to the first and second follicles by the filter pump and re-supplied to the pump room and crosslinked to the eye of the follicles by the supplied diatomaceous earth, and the filtration When the crosslinking phenomenon occurs in the eye of the follicle by the preparation step, the follicle filtration step of collecting the cutting oil filtered by the first and second follicles into the clean tank, and Pressure measurement process for measuring the pressure of the first and second receiving body to detect clogging of the follicle during the filtration of the follicle, and if the measured value in the pressure measurement process is smaller than the set value is collected in the clean tank Re-supply process for resupplying the cutting oil to various machine tools or cutting oil receiving tanks, and when the measured value in the pressure measuring step is equal to or larger than the set value of any one of the first and second receiving bodies, the flow path of the cutting oil Control the direction to remove clogging of the accommodating body follicles, and at the same time, the backwashing step of re-supplying the cutting oil to the pump room, and the filter preparation step for a predetermined time after the backwashing step is performed. Just do it.

1 is a view showing a chip filtration device by conventional follicles.

Figure 2 is an external perspective view showing the configuration of the present invention.

Figure 3 is a view showing the structure of the filter device and the filtration preparation process of the present invention.

4 is a view showing the follicle filtration process of the present invention.

5 is a view showing a backwashing process of the present invention.

6 is a view showing a state of the follicles during filtration according to the present invention.

7 is a view showing a state of the follicles during washing according to the present invention.

8 is a flowchart showing a process sequence according to the present invention.

Explanation of Drawings

101-supply pipe 102-transfer chute 103-magnetic part

104,105-First and second receptacles 106,107-First and second follicles

108-pump room 109-conveyor 110-dirty tank

111-Scraper 112-Chipbox 113-Filter Pump

114-follus eye 115-clean tank

116-Flange 117-Bolt 118,119-First and second upper cover

122-system pump 123-coupled tube 124-frame

125 coupling part 126,127 upper and lower clamps 128 lower cover

129,130-First and second supply lines 131-Drain tube

132-outlet 133,134,135-first, second, third three-way valve

136-piezoelectric sensor 137,138-first and second backwash tube

139 refill line 140 ball valve 141-float

142-Guide Tube 143-Guide 144,145-First and Second Detection Sensors

146-vortex guide 147-guide plate 148-membrane 149-separator

Hereinafter, the configuration of the present invention will be described with reference to Figs.

In the chip filtration method of the cutting oil to filter the cutting oil discharged from various machine tools to remove chips or sludge contained in the cutting oil, a dirty tank (110) to the cutting oil discharged from the various machine tools ) And a magnetic filtration step (S2) for primary filtration of chips and sludge of cutting oil collected by the supply step (S1) by magnetic force, and the magnetic filtration step (S2). A chip discharged through the chip discharge process (S3) and the magnetic filtration process (S2) to discharge the chip and sludge filtered by the) to the chip box 112 by the scraper 111 attached to the conveyor (109). The coolant collected in the 108 is supplied to the filter pump 113 and supplied to the first and second follicles 106 and 107 to the second filtration post pump room 108 and the eye of the follicle is fed by diatomaceous earth. A filtration preparation process (S4) performed for a predetermined time so that crosslinking occurs at 114; When the cross-linking phenomenon occurs in the eye 114 of the follicle by the filtration preparation step (S4), the follicle filtration step of collecting the cutting oil filtered by the first and second follicles 106 and 107 to the clean tank 115. (S5), and the pressure measurement step (S6) to measure the pressure of the first, second receiving body (104, 105) in order to detect the clogging of the follicle during the follicle filtration step (S5), and If the measured value in the pressure measurement step (S6) is less than the set value and the re-supply step (S7) for resupplying the cutting oil collected in the clean tank 115 to various machine tools or cutting oil tank (not shown) and When the value measured in the pressure measuring step (S6) is greater than or equal to a set value of any one of the first and second receiving bodies 104 and 105, the flow path of the cutting oil is controlled to be coupled to the corresponding receiving body. A backwashing step (S8) and a backwashing step (S8) to remove the clogging of the follicles and at the same time supply the cutting oil to the pump room 108 again. 8) After performing the filter preparation step (S4) for a predetermined time after performing the follicle filtration step (S5).

In the chip filtration apparatus of the cutting oil for filtering the cutting oil discharged from various machine tools to remove chips or sludge contained in the cutting oil, the metallic chip of the cutting oil collected in the dirty tank 110 The magnetic part 103 attached to the bottom surface of the dirty tank 110 and the predetermined amount of chips gathered in the magnetic part 103 may be a chip box outside the dirty tank 110 so that the magnetic force may be collected by the magnetic force. The discharge means of the chip for continuous discharge to the 112, and the pump room is spaced apart from the magnetic portion 103 by a predetermined distance upward to transfer the coolant first filtered by the magnetic portion 103 to the pump room 108 ( A transfer chute 102 connected to 108, a first accommodating body 104 supplied with the cutting oil of the pump room 108 to receive the cutting oil, and an upper flange 116 of the first receiving body 104; A first upper cover 118 coupled to the bolt 117 by The second accommodating body 105, which is coupled to the upper portion of the upper cover 118 by a bolt 117, receives the cutting oil of the pump room 108 to accommodate a predetermined amount, and the upper part of the second accommodating body 105. The second upper cover 119 coupled to the flange 116 by a bolt 117 and the bottom surface of the first and second upper covers 118 and 119 are coupled to the chip and the nonmetal body included in the cutting oil. First and second follicles 106 and 107 which are to be filtered, and coupling pipes 123 protruding downward from the bottom of the first and second upper covers 118 and 119 to a predetermined length, A plurality of frames 124 having one end attached to an outer circumferential surface of the coupling pipe 123, a coupling part 125 attached to the other end of the frame 124, and somewhat loosely coated outside the frame 124. The upper and lower clamps 126 and 127 to fix the follicles at the upper and lower ends, and the first and second receiving bodies 104 and 105 with the filter pump at the upper portion of the pump room 108. Supply to The first and second supply pipes 129 and 130, the cutting means for discharging the cutting oil filtered by the follicles to the clean tank 115, and the follicle for relieving the capillary force of the outer surface of the follicle. Clogging means for removing the water level of the pump room 108 for detecting the level of the coolant collected in the pump room 108, and the fine oil passing through the follicles of the coolant collected in the clean tank 115 Separation means of the chip for separating the chip into the pump room 108 and the system coupled to the upper portion of the clean tank 115 to supply the coolant collected in the clean tank 115 to the coolant storage tank disposed remotely It is equipped with the pump 122.

In addition, the discharge means of the chip is coupled to the conveyor 109 in the dirty tank 110, scraping the chips gathered in the magnetic portion 103 to detach from the magnetic portion 103 to the outer chip box 112 It is preferable to provide a scraper 111 of the 'b' shape for transferring the furnace chips.

In addition, the discharge means of the cutting oil is communicated from the second upper cover 119 to the first upper cover 118 and spaced apart from the first upper cover 118 by a predetermined distance downward one end is closed, the other end of the second The discharge pipe 131 extending from the upper cover 119 connected to the clean tank 115, the cutting oil filtered by the follicle of the first receiving body 104 and the cutting oil filtered by the follicle of the second receiving body 105 Preferably, the discharge pipe 131 includes at least one discharge hole 132 formed on the outer circumferential surface of the discharge pipe 131 on the first receiving body 104 side and the second receiving body 105 side, respectively.

In addition, the clogging means for removing the follicle is coupled to the first and second supply pipes (129, 130) below the lower cover 125, respectively, the first and second triangular to selectively change the flow direction of the cutting oil A third three-way valve coupled to the discharge pipe 131 to selectively supply the valves 133 and 134 and the cutting oil discharged to the discharge pipe 131 to the filter pump 113 ( 135 and piezoelectric sensors 136 attached to predetermined positions outside the first and second accommodating bodies 104 and 105, respectively, and measuring pressure inside the first and second accommodating bodies 104 and 105. When the measured value of the piezoelectric sensor is equal to or greater than a set value, the direction of the flow path is changed by controlling the first and third three-way valves 133 and 135 or the second and third three-way valves 134 and 135. As the direction of the flow path is changed by the controller (not shown) and the controller, the cutting oil in the first accommodating body 105 or the second accommodating body 106 is dirty. The first and second backwash pipes 137 and 138 coupled to the first and second three-way valves 133 and 134 and the third three-way valve 135 so as to be discharged to the tank 110. A resupply pipe 139 connected to the pump room 108 and a ball valve 140 coupled to the resupply pipe 139 to adjust the discharge amount so that only a predetermined amount of cutting oil can be discharged to the pump room 108 is provided. .

In addition, the water level detecting means of the pump room 108 is a floating body 141 floating on the surface of the cutting oil in the pump room 108, coupled to the upper portion of the pump room 108 and has a predetermined diameter toward the upper side A guide tube 142 formed in a longitudinal direction and inserted into the guide tube 142 and coupled to the floating body 141 to move up and down in the guide tube 142 according to the amount of cutting oil; Preferably, the first and second detection sensors 144 and 145 attached to the outermost peak and the lowest point of the guide tube 142 according to the top dead center of the bottom of the pump room 108 and the cutting oil. .

In addition, the first and second receiving bodies 104 and 105 have a predetermined slope to form a vortex when cutting oil is supplied or discharged to the inside of the lower cover 128 and the inside of the first upper cover 118. It further includes a vortex guide 146 formed in.

The chip filtration method of the cutting oil and the filtration apparatus of the present invention having the above-described configuration will be described with reference to FIGS. 2 to 8 as follows.

First, the cutting oil supply process (S1) to transfer the cutting oil discharged from various machine tools to a transfer device (not shown) to supply to the dirty tank 110.

At this time, the dirty tank 110 is preferably to be able to inject a predetermined amount of diatomaceous earth according to the intention of the operator to control the degree of filtration during the follicle filtration step (S4) to be described later.

In addition, the cutting oil collected in the dirty tank 110 passes through the transfer chute 102 installed in the dirty tank 110 with a predetermined flow rate by driving the filter pump 113, as shown in FIG. 3. 108 is transferred to, and the metallic chip and the like contained in the cutting oil is carried out to perform a magnetic filtration process (S2) to be attached to the magnetic portion (103).

As described above, the metallic chips attached to the magnetic part 103 may include a conveyor 109 embedded in the dirty tank 110 and a plurality of scrapers 111 attached to the conveyor 109 as illustrated in FIGS. 2 to 3. The chip discharge step (S3) to discharge the chip to the chip box 112 disposed on the outside by scratching).

On the other hand, the cutting oil collected in the pump room 108 through the transfer chute 102 is supplied into the first and second receiving bodies 104 and 105 by the filter pump 113.

At this time, the cutting oil supplied to the first and second accommodating bodies 104 and 105 has a flow rate caused by the filter pump 113 and the vortex as shown in FIG. The sludge, etc. is caught in the vortex and floats together with the cutting oil without remaining in a certain position so that the whole amount can be filtered through the follicle.

In addition, the cutting oil supplied to the first and second accommodating bodies 104 and 105 is filtered out of the first and second follicles 106 and 107 in which the cutting oil is impregnated. In the eye 114 of the first and second follicles 106 and 107, crosslinking is formed as shown in FIG. 6, and the cutting oil filtered by the first and second follicles 106 and 107 in order to increase the filtration efficiency is determined. The flow path of the third three-way valve 135 is opened to the resupply pipe 139 as shown in FIG. 3 by the controller so that the pump chamber 108 is supplied to the pump room 108 and refiltered. In this case, the resupply pipe 139 The ball valve 140 coupled to the filter valve is opened to allow the entire amount of cutting oil to be discharged to perform a filtration preparation process (S4) to allow the cutting oil to be discharged to the pump room 108.

After the filtration preparation process (S4) performed for a predetermined time as described above is entered into the full-fledged follicle filtration process (S5), at this time, the cutting oil filtered by the first and second follicles 106, 107 In order to collect the clean tank 115, the third three-way valve 135 is blocked by the controller to the resupply pipe 139 and the clean tank 115 is opened as shown in FIG. 4.

In addition, the cutting oil collected in the clean tank 115 may be supplied to a cutting oil tank (not shown) separately provided or may be directly supplied to various machine tools (S6).

At this time, the bottom surface of the clean tank 115 is formed with a guide plate 147 having a predetermined inclination as shown in Figs. 3 to 5 so that the cutting oil supplied is inclined to a predetermined region by the guide plate 147. The fine chips or sludges flowing through the first and second follicles 106 and 107 overflow to the separation hole 149 formed in the partition wall of the pump room 108 and the clean tank 115 as shown in FIG. 4. To allow it to be refiltered.

That is, the fine chips gathered in a predetermined region by the guide plate 147 flow through the separation membrane 148 and the partition wall and flow into the pump room 108 by the flow rate of the cutting oil supplied (OVERFLOW).

On the other hand, if the chip or sludge is laminated to a large amount of the outside of the follicle during the follicle filtration step (S5) and the crosslinking phenomenon is intensified and clogging occurs, the first, second, as shown in Figure 5 to detect this The pressure inside the first and second receiving bodies 104 and 105 is measured by a piezoelectric sensor 136 attached to the outside of the receiving bodies 104 and 105, and the controller presets this value. If any one of the first and second accommodating bodies 104 and 105 is greater than or equal to a preset value compared to the set value, clogging occurs in the first and second follicles 106 and 107. The pressure measurement step (S6) to be judged to be performed.

Therefore, if the measured value in the pressure measurement step (S6) is smaller than the set value, the re-supply step (S7) and the follicle filtration step (S5) continue to be performed, and if the measured value is greater than or equal to the set value, the back washing step In this case, the controller controls the opening / closing state of the first, second, and third three-way valves 133, 134, and 135 to change the flow direction so that the back washing process S8 is performed. It is done.

An example of the above backwashing process S8 will be described with reference to FIGS. 5A and 5B.

The first accommodating body 104 is disposed at a position where cutting oil may be supplied earlier than the second accommodating body 105 so that the clogging of the first follicle 106 is preceded by the second follicle 107. (When the clogging occurs in any of the first and second follicles 106 and 107 first during operation, the piezoelectric sensor 136 and the controller are identified. It is assumed that the blockage occurs at 106.

Therefore, the filtration efficiency of the first follicle 106 is lowered before the second follicle 107, and accordingly the pressure inside the first accommodating body 104 is increased, and the piezoelectric sensor 136 shown in FIG. Will be detected.

In addition, when the measured value of the piezoelectric sensor 136 is equal to or larger than the set value of the controller compared to the set value, the first three-way valve 133 coupled to the supply pipe 101 is illustrated in FIG. 5A. And the flow path direction of the third three-way valve 135 coupled to the discharge pipe 131 for a predetermined time to perform a backwash process (S8).

That is, the first three-way valve 133 blocks the cutting oil supplied from the supply pipe 101 and prevents the cutting oil of the first accommodating body 104 from closing the first backwash pipe 137 as shown in FIG. 5A. Open to be discharged to the dirty tank 110 through.

The third three-way valve 135 blocks the clean tank 115 and allows the cutting oil to be discharged to the resupply pipe 139. At this time, the ball valve 140 coupled to the resupply pipe 139 is provided. It can be opened about half so that only about 50% of the coolant discharged to pass through it can be supplied to the pump room (108).

At this time, depending on the amount of cutting oil ball valve 140 may be more than 50% or less than 50% as intended by the operator.

Therefore, when 100% of the cutting oil is introduced into the discharge hole 132 of the second accommodating body 105, only about 50% of the cutting oil is discharged into the ball valve 140, and the remaining cutting oil is the second accommodating body ( The first follicle 106 loosely coupled to the frame 124 by the cutting oil discharged back into the discharge hole 132 on the side of the first accommodating body 104 and introduced into the discharge hole 132 on the 105 side. 6 is expanded to the state of FIG. 7 and at the same time the cutting oil flows from the inside of the first follicle 106 to the outside, the chip, sludge and diatomaceous earth attached to the outer surface of the first follicle 106, as shown in FIG. Detachment will eliminate clogging.

The chip, sludge and diatomaceous earth detached from the first follicle 106 are dirty tank 110 by the first backwashing pipe 137 via the first supply pipe 129 and the first three-way valve 133. It is supplied to the re-filtered by the magnetic portion 103 is transferred to the pump room (108).

In addition, when clogging occurs in the second follicle 107 of the second accommodating body 105, the piezoelectric sensor 136 attached to the outer side of the second accommodating body 105 is formed inside the second accommodating body 105. As described above, the second three-way valve 134 measures the pressure of the second receiving valve 105 through the second supply pipe 130 and the second three-way valve 134. Control the flow direction as shown in Figure 5b to be discharged to the dirty tank 110 through the two backwash pipe 138, the flow path direction of the third three-way valve 135 is opened to the resupply pipe 139 side and dirty tank ( The flow path direction is changed as shown in FIG. 5B for a predetermined time so that about 50% of cutting oil can be discharged to the pump room 108 by blocking the side 110 and the ball valve 140.

Therefore, the cutting oil filtered by the first follicle 106 of the first accommodating body 104 flows into the discharge hole 132 on the side of the first accommodating body 104 and discharges about 50% to the resupply pipe 140. The remaining cutting oil is discharged into the second follicle 107 through the discharge hole 132 of the second accommodating body 105, and the cutting oil is filtered from the inside of the second follicle 107 to the outside of the second follicle ( As 107 is expanded from the state of FIG. 6 to the state of FIG. 7, chips, sludge, diatomaceous earth, etc. are detached from the second follicle 107 and the clogging is eliminated.

As described above, the back washing process S8 is performed by measuring the degree of clogging of the first and second follicles 106 and 107 according to the pressure change in the first and second receiving bodies 104 and 105. Control the direction of the first, second, and third three-way valves 133, 134 and 135 according to the control of the controller to automatically reverse the clogging of the first and second follicles 106, 107. It will be able to wash.

In addition, when the backwashing process (S8) is performed and the cutting oil is discharged to the first supply pipe 129 or the second supply pipe 130, it is swirled by the vortex guide 146 as shown in Figures 5a, 5b. By discharging, it is possible to obtain an effect of quickly discharging cutting oil.

As described above, when the backwashing process (S8) of any one of the first foam 106 or the second foam 107 is completed for a predetermined time, the above-described filtration preparation process (S4) may be performed for a predetermined time. On the outer surface of the first and second follicles 106 and 107, as shown in FIG. 6, crosslinking occurs, and after the filtration preparation step S4 is performed, the filtration step S5 is performed again. To supply the filtered cutting oil to the clean tank 115.

Meanwhile, the water level of the pump room 108 is increased during the filtration preparation process (S4) and the follicle filtration process (S5), so that the floating body 141 and the guide 143 are higher than the predetermined water level along the guide pipe 142. When rising or falling, the first and second detection sensors 144 and 145 detect this and send a signal to the controller. Accordingly, an alarm light attached to a control panel (not shown) lights and a beep sound. In this regard, the operator can promptly cope with the cutting oil in the pump room 108 or increase the supply amount.

As described above, the present invention maximizes the filtration effect by passing the chip or sludge, etc., contained in the cutting oil discharged from the machine tool through two-stage filtration by magnetic force and the follicle, and is laminated on the outer surface of the follicle. If clogging of the follicle occurs due to chips or sludge, the flow path of cutting oil can be automatically reversed so that the follicle can be backwashed to remove the clogging and the follicle is damaged by the chip or sludge and by the clogging of the follicle. In addition to preventing the filtration function from being performed, the maintenance cost can be reduced by preventing the follicles from being shortened by frequent dismantling of the assembly and frequent replacement of the follicles in order to eliminate clogging of the follicles. Very useful invention that can reduce and smoothly filter chips or sludge to be.

Claims (7)

In a chip filtration method of cutting oil to filter the cutting oil discharged from various machine tools to remove chips or sludge contained in the cutting oil, Supply process for collecting the coolant discharged from various machine tools into a dirty tank, A magnetic filtration step of primary filtration of chips and sludge of cutting oil collected by the supplying step by magnetic force; A chip discharging step of discharging the chips and sludge filtered by the magnetic filtration step into the chip box by a scraper attached to the conveyor; After passing through the magnetic filtration process, the cutting oil collected in the pump room is supplied as a filter pump, and the filter oil is re-supplied to the pump room after the second filtration to the first and second follicles, so that crosslinking phenomenon occurs in the eye of the follicle by the supplied diatomaceous earth. A filtration preparation process performed for a predetermined time; A follicle filtration step of collecting the cutting oil filtered by the first and second follicles into a clean tank when crosslinking occurs in the eye of the follicle by the filtration preparation step; A pressure measuring step of measuring pressure of the first and second accommodating bodies to detect clogging of the follicles during the follicle filtration step; A resupply process for resupplying the cutting oil collected in the clean tank to various machine tools or cutting oil receiving tanks if the measured value in the pressure measuring process is smaller than the set value; If the value measured in the pressure measuring process is equal to or larger than the set value of any one of the first and second accommodating bodies, the flow path of the cutting oil is controlled to remove the clogging of the accommodating main body follicles and pump the cutting oil. Backwashing process, Chip filtration method of cutting oil, characterized in that to perform the filter preparation step for a predetermined time after the backwashing step to perform the follicle filtration step. In the chip filtration device of the cutting oil for filtering the cutting oil discharged from various machine tools to remove chips or sludge contained in the cutting oil, A magnetic part attached to the bottom surface of the dirty tank so that the metal chips among the cutting oil collected in the dirty tank can be collected by magnetic force; Chip discharging means for continuously discharging a predetermined amount of chips gathered in the magnetic portion to the chip box outside the dirty tank, A transfer chute connected to the pump room spaced apart from the magnetic part by a predetermined distance upward in order to transfer the cutting oil first filtered from the magnetic part to the pump room; A first accommodating body receiving the cutting oil of the pump room to receive the cutting oil; A first upper cover coupled to the upper flange of the first accommodating body by a bolt; A second accommodating body coupled to the upper portion of the first upper cover with a bolt to receive a predetermined amount of cutting oil from the pump room, and to accommodate a predetermined amount; A second upper cover coupled to the upper flange of the second accommodating body with a bolt; A follicle coupled to a bottom portion of the first and second upper covers to filter chips and non-metal bodies contained in cutting oil; A coupling tube protruding downward from the bottom of the first and second upper covers to a predetermined length; A plurality of frames having one end attached to an outer circumferential surface of the coupling pipe; A coupling part attached to an inner side of the other end of the frame, Upper and lower clamps to fix the loosely coated follicles to the outside of the frame from the upper and lower ends, A first supply pipe and a second supply pipe configured to supply the first accommodating body and the second accommodating body to a filter pump at an upper portion of the pump room; Cutting means for discharging the cutting oil filtered by the follicles into the clean tank; And clogging means of the follicle for removing the clogging of the outer surface of the follicle, Water level sensing means of the pump room for detecting the water level in the pump room so that the cutting oil collected in the pump room does not overflow into the clean room; And a system pump coupled to an upper portion of the clean tank to supply the coolant collected into the clean tank to a coolant storage tank disposed remotely. The method of claim 2, The discharge means of the chip is coupled to the conveyor built into the dirty tank 110, scraping the chips attached to the magnetic portion and detached from the magnetic portion provided with a scraper of the 'b' shape for transferring the chips to the outer chip box Chip filtration device for cutting oil, characterized in that. The method of claim 2, The discharge means of the cutting oil is communicated from the second upper cover to the first upper cover and one end is closed by a predetermined distance spaced downward from the first upper cover, the other end is extended from the second upper cover and the discharge pipe connected to the clean tank, At least each of the cutting oil filtered by the follicle of the first receiving body and the cutting oil filtered by the follicle of the second receiving body are formed at predetermined positions on the outer circumferential surface of the discharge pipe on the first receiving body side and the second receiving body side, respectively. Chip filtration device for cutting oil, characterized in that provided with one or more discharge holes. The method of claim 2, The clogging removing means of the follicle is coupled to the first and second supply pipes of the lower cover, respectively, the first and second three-way valves to selectively change the flow direction of the cutting oil; A third three-way valve coupled to the discharge pipe to selectively change the flow direction of the cutting oil discharged to the discharge pipe to the pump room; A piezoelectric sensor attached to a predetermined position outside the first and second receiving bodies, respectively, for measuring a pressure of cutting oil contained in the first and second receiving bodies; A controller configured to change the direction of the flow path by controlling the first and third three-way valves or the second and third three-way valves when the measured value of the piezoelectric sensor is greater than or equal to a set value; First and second backwash pipes coupled to the first and second three-way valves so that cutting oil in the first receiving body or the second receiving body is discharged to the dirty tank as the direction of the flow path is changed by the controller; A resupply pipe connected to the third three-way valve and the pump room; Chip filtration device for cutting oil, characterized in that provided with a ball valve coupled to the supply pipe to adjust the discharge amount to discharge only a predetermined amount of cutting oil to the pump room. The method of claim 2, The water level detecting means of the pump room and the floating body floating on the surface of the cutting oil in the pump room, A guide tube coupled to the upper portion of the pump room and having a predetermined diameter and formed in a longitudinal direction toward the upper side; A guide inserted into the guide tube and coupled to the floating body to move up and down in the guide tube according to the amount of cutting oil; Chip filtering device for cutting oil, characterized in that provided with the first and second detection sensors attached to the outermost peak and the lowest point of the guide tube according to the bottom surface of the pump room and the top dead center of the cutting oil. The method of claim 2, The cutting oil further comprises a vortex guide having a predetermined inclination to form a vortex when the cutting oil is supplied or discharged to the first and second accommodating bodies, the inner side of the lower cover and the inner side of the first upper cover. Chip filter.