KR20150074739A - Device for preserving cooling coolant for machine tool - Google Patents

Abstract

The present invention relates to a device for storing cutting oil for a machine tool including a device for cooling cutting oil, the device for storing cutting oil for a machine tool comprising: a cutting oil storage tank for storing cutting oil; a plurality of filters for separating foreign materials from the cutting oil; a cooling pipe contained in the cutting oil storage tank and having refrigerant moving therein; a suction part installed on one end of the cooling pipe to suck the refrigerant into the cooling pipe; a discharge pipe installed on the other end of the cooling pipe to discharge the refrigerant sucked into the cooling pipe; a temperature detection part for sensing the temperature of the cutting oil; and a control part for controlling the suction part and the discharge part.

Description

[0001] The present invention relates to a device for preserving cooling coolant for machine tool,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cutting oil storage device for a machine tool, and more particularly, to a cutting oil storage device for a machine tool capable of preventing clogging of a filter by a chip and easily cooling a cutting oil.

In general, a machine tool supplies a liquid such as a cutting oil to a spindle or a tool and a workpiece in order to increase the cutting effect and to lubricate and cool it. Such a cutting oil is recovered and circulated after use. In the recovered cutting oil, the chips generated during cutting are mixed and recovered. The coolant is separated from the chips by using the purifier, and then the coolant is circulated again.

On the other hand, since the chips generated during the cutting process are at a high temperature, the temperature of the cutting oil is increased. If the temperature of the cutting oil rises, it can not serve as cooling oil. In addition, the chips generated during the cutting process vary in material, shape and size depending on the workpiece, and it is necessary to periodically clean the cutting oil storage device because it is mixed with the cutting oil and causes the equipment failure during circulation.

1, a conventional coolant storage device 10 includes a coolant cooling device 11, a coolant oil reservoir 12, and a filter 13, and is connected to a coolant oil reservoir 12 Through the filter 13, and is transferred to the machine body.

The conventional coolant cooling apparatus 11 uses a contact cooling method in which the coolant is sucked from the coolant oil reservoir 12 through the filter 13 and brought into contact with the coolant to cool the coolant. There is a problem that the coolant can not be cooled smoothly because the coolant is prevented from flowing smoothly. Particularly, fine chips such as aluminum chips are easily trapped in the filter, which prevents the coolant from circulating and thus the filter needs to be cleaned.

Korean Patent Laid-Open Publication No. 110-2013-0037938

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a coolant cooler of a machine tool capable of cooling a coolant without clogging of a filter by a cutting chip, And to provide a storage device.

In order to accomplish the object of the present invention, there is provided an apparatus for storing a cutting oil of a machine tool, comprising: a cutting oil storage tank for storing cutting oil; a plurality of filters for separating foreign matter from the cutting oil; A suction unit installed at one end of the cooling pipe to suck the refrigerant into the cooling pipe, a discharge unit installed at the other end of the cooling pipe to discharge the refrigerant sucked into the cooling pipe, a temperature detector for sensing the temperature of the coolant, And a control unit for controlling the suction unit and the discharge unit.

In another preferred embodiment of the apparatus for storing a cutting oil of a machine tool according to the present invention, the apparatus for storing a cutting oil of a machine tool further comprises a vaporization preventing device for preventing vaporization of the cutting oil.

In another preferred embodiment of the present invention, the coolant storage tank of the coolant storage device of the machine tool further comprises a flow rate display unit for displaying a cutting flow rate and a chip amount display unit for displaying a chip amount .

In another preferred embodiment of the apparatus for storing a coolant of a machine tool according to the present invention, the coolant sucked into the coolant pipe of the coolant storage device of the machine tool is air.

In another preferred embodiment of the present invention, the controller of the coolant storage device of the machine tool controls the suction unit and the discharge unit based on the temperature of the coolant sensed by the temperature detector .

In another preferred embodiment of the apparatus for storing cutting oil of a machine tool according to the present invention, the cutting oil storage tank of the cutting oil storage device of the machine tool is divided by a plurality of partitions, A plurality of filters having a large mesh size may be sequentially installed so that they are separated in order of size.

The apparatus for storing cutting oil of a machine tool according to the present invention comprises a plurality of multi-stage filters and is easy to maintain and maintain in each section. Cooling can be performed without clogging of the filter by contacting coolant with heat exchange, By cooling the cutting oil, it is not necessary to secure additional space, so space utilization is easy.

1 shows a perspective view of a conventional coolant storage device.
Fig. 2 shows a configuration diagram of a coolant storage device according to the present invention.
3 is a plan view of a cutting oil storage tank according to the present invention.
4 is a side view of a coolant storage device according to the present invention.
5A, 5B and 5C show a plan view, a side view and a cross-sectional view of a coolant storage device according to the present invention.
FIGS. 6A, 6B and 6C are a plan view, a side view, and a cross-sectional view, respectively, at a constant height of a coolant storage device according to the present invention.
Figure 7a shows a schematic plan view of a coolant storage tank according to the present invention.
7B is an explanatory view of the attachment of the anti-vaporization device according to the present invention.

Hereinafter, an apparatus for storing a coolant of a machine tool according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention is not limited to the embodiments described herein, but may be embodied in many different forms.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

FIG. 2 is a schematic structural view of a cutting oil storage device 100 of a machine tool according to the present invention, and FIG. 3 is a plan view of a cutting oil storage tank 130 according to the present invention. As shown in FIGS. 2 and 3, the cutting oil storage device 100 of the machine tool includes a coolant storage tank 130 and a coolant cooling device 110.

In addition, since the machine tool is operated to mix the cutting chips generated in the processing of the workpiece with the cutting oil, the cutting oil must be used after being recycled. Therefore, as shown in FIG. 4, A separation device such as a filter 180 or a chip fan 136 is required.

The operating process of the cutting oil storage device 100 of the machine tool according to the present invention is such that the cutting oil of the machine main body flows into the cutting oil storage tank 130 and the chip fan 136 installed on the upper plate of the cutting oil storage tank 130 performs some cutting The chips are collected and the chips that have passed through the chip fan 136 without being collected are sequentially filtered by the plurality of filters 180 according to the size of the particles.

2, the cutting oil storage device 100 according to the present invention includes a cutting oil storage tank 130 for storing cutting oil, a plurality of filters 180 for separating foreign matter from the cutting oil, A suction unit 113 installed at one end of the cooling pipe 111 and sucking the refrigerant into the cooling pipe 111, a cooling pipe 111 installed in the cooling pipe 111, A temperature detector 131 for sensing the temperature of the coolant, a controller 150 for controlling the suction unit and the discharge unit, .

The coolant storage tank 130 is provided with a coolant storage space for storing and circulating coolant that has performed lubrication and cooling in the process of machining a machine tool, Respectively.

The cooling pipe 111 may be provided with a fixing device such as a coupling bracket for connecting the cooling pipe 111 to the fixing device such as the coupling bracket in the cutting oil storage tank 130. [ As shown in Fig.

The cooling pipe 111 may have a suction part 113 at one end and a discharge part 114 at the other end so that the refrigerant can be introduced into and discharged from the cooling pipe 111.

The cooling pipe 111 is installed at a predetermined distance from the bottom of the coolant storage tank 130 so as to be locked with the coolant stored in the coolant storage tank 130.

When the cooling pipe 111 is submerged in the cutting oil in the cutting oil storage tank 130, the cooling pipe 111 is brought into contact with the cutting oil, so that the refrigerant passing through the cooling pipe 111 Heat exchange occurs between the outside air and the cutting oil.

As shown in FIGS. 2 and 3, the cooling pipe 111 is bent in various forms, thereby increasing the overall length of the cooling pipe 111, thereby increasing the contact area with the cutting oil and increasing the heat exchange efficiency.

The refrigerant passing through the inside of the cooling pipe 111 may be air. That is, the outside air of the coolant storage device 100 is sucked through the suction unit 113 and then discharged to the discharge unit 114.

The suction unit 113 and the discharge unit 114 are controlled by the controller 150 and the controller 150 controls the temperature of the coolant stored in the coolant storage tank 130 or the temperature of the coolant stored in the coolant storage device 100 The control signal can be generated based on the temperature of the outside air of the outdoor unit.

A temperature detector 131 for detecting the temperature of the cutting oil is provided at one side of the coolant storage tank 130 and a temperature detector 131 for detecting the temperature of the atmosphere may be provided outside the coolant storage tank 130 .

In addition, the controller 150 may be configured to operate the fan 115 when the difference between the atmospheric temperature and the cutting oil temperature is greater than or equal to a certain size, and to stop the operation when the temperature of the fan 115 falls below a certain level after operation.

 For example, when the temperature of the cutting oil becomes higher than the atmospheric temperature by 2 degrees Celsius, the controller 150 outputs an operation signal for operating the fan to the driving unit of the fan. When the temperature of the cutting oil becomes lower by 2 degrees Celsius and becomes equal to the atmospheric temperature, And outputs the stop signal to the driving unit of the fan. Here, the stop signal may be set not to change the temperature but to elapse of time. That is, it is possible to stop the operation when a predetermined time has passed after the operation of the fan.

The air passing through the inside of the cooling pipe 111 can be forcibly sucked and discharged by a driving source such as an air flow means such as a fan 115 and a motor. The fan 115 may be installed in at least one of the suction unit 113 and the discharge unit 114 of the cooling pipe 111.

As shown in FIG. 4, the apparatus for storing a cutting oil of a machine tool according to the present invention includes a chip pan 136 for picking up cutting oil and filtering the chips, and a cutting chip And a plurality of filters 180 for filtering are sequentially arranged.

The chip fan 136 is located on the upper plate of the coolant storage tank 130 and the filter 180 is disposed on one side of the coolant storage tank 130 with a difference in height or position, .

Further, the cutting oil storage device 100 according to the present invention includes a primary filter for filtering cutting chips by flowing coolant stored in the cutting oil storage tank 130, and a filter cloth for housing cutting chips that have passed through the primary filter A second filter, a suction pump provided between the first filter and the second filter for pumping coolant from the first filter to supply the coolant to the second filter, and a circulation pump for pumping coolant from the second filter to the work space, The pump may include an air injector for supplying compressed air to the secondary filter to remove chips accumulated in the filter cloth.

The pump (not shown) includes a turbo pump and a volumetric pump. The turbo pump includes a centrifugal pump and an axial flow pump. The positive displacement pump includes a reciprocating pump and a rotary pump. The positive displacement pump is advantageous in that it generates high pressure compared to a turbo pump and does not change the discharge amount even if the efficiency is high and the pressure is changed. In particular, the rotary pump is suitable for transporting highly viscous oil Do. The rotary pump includes a vane pump, a gear pump, and a screw pump.

The coolant storage tank 130 may further include a flow rate display unit 133 for displaying a cutting flow rate and a chip amount display unit 135 for displaying the amount of chips to be cut. Lt; / RTI > That is, the worker confirms the extent to which chips are deposited in the closed cutting oil reservoir 130 through the transparent window.

This makes it easy to determine when to remove the chips. Further, the operator opens the cover of the coolant storage tank 130 and removes the chips according to the degree to which the chips are deposited. If the accumulated amount of cutting chips increases, the flow rate of the cutting oil that can be accommodated in the coolant storage tank 130 may be reduced and the cooling performance of the cooling pipe 111 may be deteriorated. Therefore, So that the accumulated amount of chips can be confirmed.

The refrigerant sucked into the cooling pipe 111 may be air. That is, the outside air of the coolant storage device 100 flows into the suction part 113 of the cooling pipe 111, and the introduced outside air moves through the cooling pipe 111 and performs heat exchange with the cutting oil. The coolant having undergone the heat exchange is discharged through the discharge part 114 of the cooling pipe 111 and circulated.

In addition, various fluids other than air may be used as the refrigerant. That is, any fluid that is disposed inside the coolant storage tank 130 and is heat-exchangeable with the coolant may be used. For example, alcohol, cooling water, or the like may be used.

In another preferred embodiment of the apparatus for storing a cutting oil of a machine tool according to the present invention, a cutting oil storage tank 130 of a cutting oil storage device of a machine tool is divided into a plurality of partitions, A plurality of filters 180 having a large mesh size can be sequentially installed so that the size of foreign matter is separated in order. Accordingly, it is possible for the user to separate the foreign matters easily and to separate the foreign matters in descending order of size, thereby increasing the filtering effect.

5A, 5B, and 5C are a plan view, a side view, and a cross-sectional view, respectively, of a cutting oil storage device according to the present invention. As shown in the drawing, the cutting oil storage device 100 includes a chip fan 136 mounted on a top plate of a coolant storage tank 100, The fan 136 may include one or more filters 180 to filter the chips. The filter 180 may be provided in a mesh shape.

5C shows a cross-sectional side view of the coolant storage apparatus shown in FIG. 5B. The size and position of the chip fan 136 and the filter 180 coolant storage tank 130 of the coolant storage apparatus may be variously modified .

6A, 6B, and 6C are a plan view, a side view, and a cross-sectional view, respectively, at a constant height of the coolant storage device according to the present invention. In the coolant storage device 100, the filter 180 is sequentially disposed according to the height, And may be divided into sections according to movement.

FIG. 7A is a schematic plan view of a coolant storage tank according to the present invention, and FIG. 7B is an explanatory view of the attachment of the anti-vaporization device according to the present invention. As shown in the drawing, the cutting oil storage tank 130 is provided with a mesh-shaped filter 180, and a side surface of a vaporization prevention device 170 is provided.

The vaporization prevention device 170 is a device for preventing vaporization of the cutting oil when external air as a coolant flows into the cooling pipe 111 and is in contact with cutting oil. The vaporization prevention device 170 may be made of a fiber material such as a nonwoven fabric. The vaporization phenomenon may also occur when the temperature rises or the pressure decreases, so that it may further include a device for controlling the temperature and pressure of the introduced outside air.

In some cases, the machine tool separates the metal chip and the cutting oil, which are discharged while processing the workpiece of the metal, to discharge the metal chip, and the coolant stored in the primary coolant storage tank is floated to the upper part through the filtering process using the supply pump The high-purity cutting oil is directly introduced into the machine tool by the high-pressure pump. The cutting fluid containing chips and sludge discharged to the lower part during the filtration body filtering process can be collected and discharged to the sludge box through the chip conveyor installed in the storage chamber. The separated cutting oil can be moved to the primary coolant reservoir by the return pump after being placed in the secondary coolant reservoir. Further, it may be separated into a separation method by a cyclone method and a separation method by a bag filter.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

10: Coolant storage device 11: Coolant cooling device
12: Cutting oil reservoir 13: Filter
14: Pump 100: Coolant storage device
110: coolant cooling device 111: cooling pipe
113: Suction section 114:
115: fan 130: cutting oil storage tank
131: Temperature detection unit 133: Flow rate display unit
135: chip amount display part 136: chip pan
150: control unit 170: vaporization prevention device
180: Filter

Claims (6)

1. A coolant storage device for a machine tool having a coolant cooling device,
A coolant storage tank for storing coolant;
A plurality of filters for separating foreign matter from the cutting oil;
A cooling pipe which is built in the coolant storage tank and through which refrigerant is moved;
A suction unit installed at one end of the cooling pipe and sucking the refrigerant into the cooling pipe;
A discharge unit installed at the other end of the cooling pipe to discharge the refrigerant sucked into the cooling pipe;
A temperature detector for sensing a temperature of the cutting oil; And
A control unit for controlling the suction unit and the discharge unit; And a controller for controlling the operation of the cutting tool.
The method according to claim 1,
And an evaporation preventing device for preventing evaporation of the cutting oil.
3. The method of claim 2,
Wherein the cutting oil storage tank further comprises a flow rate display unit for indicating a cutting flow rate or a chip amount display unit for displaying a cutting chip amount.
The method of claim 3,
And the refrigerant sucked into the cooling pipe is air.
5. The method of claim 4,
Wherein the control unit controls the suction unit and the discharge unit based on the temperature of the cutting oil sensed by the temperature detection unit.
6. The method according to any one of claims 1 to 5,
Wherein the coolant storage tank is divided by a plurality of partition walls and each of the storage tanks separated by the partition wall is provided with a plurality of filters having a large mesh in order so that the size of the foreign substances is separated in descending order. Coolant storage device.

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