JPH06304842A - Coolant supplier - Google Patents

Abstract

PURPOSE:To decrease a number of part items and a cost of manufacture while miniaturizing a device by integrally providing a coolant reservoir part and a coolant delivery source. CONSTITUTION:A coolant supplier 10 has, in a main unit side, a coolant reservoir part 20 for storing a coolant C and a piston pump 30 (coolant delivery source, reciprocating pump) for delivering the coolant C, stored in this coolant reservoir part 20, to a side of a machine tool 1 through a coolant supply route 40. This piston pump 30 is fixed to a side surface wall of the coolant reservoir part 20, and in the coolant supplier 10, the piston pump 30 and the coolant reservoir part 20 are formed into an integral type. Accordingly, a pressure drop in a route therebetween is decreased, to eliminate necessity for using a superhigh pressure pump in a delivery side of the coolant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coolant supply device for supplying coolant to a machine tool such as an NC lathe.

[0002]

2. Description of the Related Art In order to promote automation of machining by a machine tool, it is necessary to extend the life of a tool and efficiently eliminate entangled chips. Therefore, by supplying ultra-high pressure coolant to the tool, a high pressure coolant supply device has been developed that extends the life of the tool and forcibly crushes and discharges chips of difficult-to-cut materials. A typical one is shown in FIG. This device is configured by combining a coolant storage section 80 for storing coolant and an ultrahigh pressure pump 90 which is a separate body from the coolant storage section 80. Here, the ultra-high pressure pump 90
Even if only minute chips are mixed inside, not only the discharge pressure is lowered, but also itself may be damaged. Therefore, in order to recirculate the coolant from the machine tool side so that it can be reused, a high-performance foreign matter removing device is required on the coolant storage part 80 side. In the device shown in FIG. A plurality of coolant chambers 81, 82,
It is divided into 83 and is passed through the filters 84 and 85 when the coolant is pumped by the pump 88 from the front stage to the rear stage.

[0003]

However, in the conventional coolant supply device 100, the coolant reservoir 80 and the ultra-high pressure pump 90 are separate units, which is a large device and has a large number of parts. There is a problem that it is not possible to provide such products.

In addition to the purpose of forcibly crushing the chips of difficult-to-cut materials, the coolant reservoir 8
0 and the ultra-high pressure pump 90 are separate bodies, and it is necessary to compensate for the pressure loss due to the path 91 between them, so that the ultra-high pressure pump 90 of high performance is used. Moreover, the higher the discharge pressure required for the ultra-high pressure pump 90, the higher the foreign matter removal capability required on the coolant reservoir 80 side. Therefore, it is necessary to increase the number of coolant chambers and increase the number of filtrations. Price is difficult.

In view of the above problems, the object of the present invention is to
An object of the present invention is to provide a coolant supply device capable of downsizing and cost reduction.

[0006]

In order to solve the above problems, a coolant supply device according to the present invention is a device for extending the life of a tool and for promoting the crushing of chips, and is shown in FIG. As described above, the coolant reservoir 20 that stores the coolant C supplied to the machine tool 1 and the high-pressure coolant that is provided integrally with the coolant reservoir 20 and discharges the coolant C stored therein. Discharge source, for example, piston pump 30 (reciprocating pump)
And a coolant supply path 40 through which the coolant C discharged from the piston pump 30 passes. That is, the coolant supply device 10 of the present invention includes the coolant reservoir 20 and the coolant discharge source (piston pump 30).
The feature is that and are integrated.

Here, in the coolant reservoir 20, a plurality of coolant chambers 21 and 2 are formed in multiple stages from the coolant inlet on the upper side to the coolant outlet on the lower side.
It is preferable to provide foreign matter removing means 50 that removes foreign matter such as chips from the coolant C that drops due to its own weight from the coolant chambers 2 and 23 and the coolant chamber on the upper side toward the coolant chamber on the lower side. Here, as the foreign matter removing means 50, a filter 51 for filtering and separating foreign matter in the coolant C is used.
(Filtering means), foreign matter adsorbing means such as a magnet separator 53 and a sludge collector 54 for adsorbing and removing metal scraps in the coolant C by magnetic force can be used.

In the present invention, route opening / closing means for controlling the supply and stop operations of the coolant C by opening and closing the coolant supply route 40 so that the start and stop of the discharge of the coolant C can be responsively controlled, for example, air on / off. It is preferable to provide the valve 60.

[0009]

In the coolant supply device 10 according to the present invention, since the coolant reservoir 20 and the coolant discharge source (piston pump 30) are integrated, the size of the device can be reduced. Moreover, since the number of parts can be easily reduced, the manufacturing cost can be reduced. Further, the coolant supply device 10 according to the present invention has an object to prolong the life of the tool and promote the crushing of chips. In addition to that, since the coolant reservoir 20 and the coolant discharge source are integrally formed, and the pressure loss due to the path between them is small,
There is no need to use an expensive ultra-high pressure pump as the coolant discharge source. Therefore, since it is possible to use a pump such as the piston pump 30 that does not cause a great problem even if fine chips are mixed in, a small and inexpensive foreign matter removing means such as the filter 51 and the magnet separator 53 is sufficient. .

Further, in the present invention, the coolant reservoir 20 is provided with multi-stage coolant chambers 21, 22, and 23, and the coolant C is moved by utilizing the fact that the coolant C overflows to the lower stage side. If a structure for removing foreign matter from the coolant is adopted, the coolant reservoir 2
The feed pump for transferring the coolant C within 0 is unnecessary.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a coolant supply device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing the overall configuration of the coolant supply device of this embodiment, FIG. 2 is a front sectional view of the main body side thereof, FIG. 3 is a plan sectional view thereof, and FIG. 4 is a side sectional view thereof. 5 and 5 are plan views of the inside of the coolant reservoir.

(Overall Structure of Coolant Supplying Device) In these drawings, a coolant supplying device 10 of the present example has a coolant storing section 20 for storing a coolant C on the apparatus main body side, and this coolant storing section 20. Piston pump 30 for discharging the stored coolant C to the machine tool 1 side via the coolant supply path 40.
(Coolant discharge source, reciprocating pump). The piston pump 30 has a side wall 203 of the coolant reservoir 20.
The coolant supply device 10 is a device in which the piston pump 30 and the coolant reservoir 20 are integrated.

(Structure of Coolant Reserving Section) The coolant reserving section 20 is a rectangular container made of SUS, and the inside thereof has an upper-stage coolant chamber 21 and a middle-stage coolant chamber 2
2, the lower coolant chamber 23 is partitioned, and the upper coolant chamber 21 is covered with a cover 204.

A valve 201 (coolant inlet) is attached to the side surface portion 211 of the upper coolant chamber 21, and the coolant C is circulated from the machine tool 1 side via the valve 201. The upper coolant chamber 21 is partitioned into three spaces by a wire mesh partition plate 213 and the like, and one of the spaces has a magnet separator 53. Magnet separator 5
3 is a horizontally arranged magnet roller 531 and a squeegee 5 arranged so that the tip of the magnet roller 531 is in contact with the roller surface.
32, the magnet roller 531 is disposed such that its lower side is immersed in the coolant C, and is rotatable by a rotational drive force from a drive source (not shown). A chip discharge portion 533 is provided on the lower end side of the squeegee 532, and chips attached to the magnet roller 531 can be scraped off by the squeegee 532 and discharged to the chip discharge portion 533. A pressing roller 535 is provided above the magnet roller 531.
It is rotatably supported on the tip side of 37. Support piece 53
7, a coil spring 536 is attached via a support shaft 538, and the coil spring 536 urges the pressing roller 535 toward the magnet roller 531. Here, the biasing force of the coil spring 536 causes the support piece 537 of the support shaft 538 to move.
It can be adjusted by adjusting the screwing amount.

The upper-stage coolant chamber 21 and the middle-stage coolant chamber 22 are connected by a communication pipe 212, and the coolant C
Is from the upper coolant chamber 21 to the middle coolant chamber 2
Overflowing to 2. The middle-stage coolant chamber 22 has a filter 51 at a position corresponding to the outlet of the communication pipe 212. The filter 51 has a triple structure, and includes filter members 514, 515, and 516 on the lower surfaces of metal frames 511, 512, and 513.

The coolant chamber 22 in the middle stage and the coolant chamber 23 in the lower stage are connected by a communicating portion 222, and the coolant C
Is from the coolant chamber 22 in the middle stage to the coolant chamber 2 in the lower stage.
Overflowing to 3. The lower coolant chamber 23 has a support portion 223 provided near the communication portion 222.
The sludge collector 54 is detachably attached to the supporting portion 223. The sludge collector 54 is a magnet shaft or a magnet tube, and is capable of adsorbing and removing metal scraps from the coolant C that is transmitted along the magnet shaft and the coolant C that is stored in the lower coolant chamber 23. Further, since the sludge collector 54 is detachable from the supporting portion 223, the sludge collector 54 can be attached to and detached from the supporting portion 2 after the metal dust is attached.
In the state of being removed from 23, it is possible to remove the metal scraps adsorbed there.

An L-shaped pipe 231 is provided on the bottom surface side of the lower coolant chamber 23, and the pipe 231 is connected to the side wall 232 of the lower coolant chamber 23 to the coolant outlet 2
It is opened as 02. Further, the pipe 231 is branched into three at the base end side, and the suction filter 52 is provided at each end. At a lateral position of the lower coolant chamber 23, there is a space 71 communicating with the inside thereof,
A float switch 72 for monitoring the liquid level in the lower coolant chamber 23 is provided.

(Structure of Coolant Discharge Source and Coolant Supply Route) The coolant outlet 202 of the lower coolant chamber 23 is connected to the suction port 311 of the piston pump 30 through the coolant suction route 300. In the piston pump 30, the rotational driving force from the motor 32 is transmitted to one or a plurality of plungers via the power transmission belt 321 and the piston / crank mechanism 322, and the coolant C is discharged at high pressure. Here, the piston pump 30
The pump main body 31 and the motor 32 are vertically fixed to the side wall 203 of the coolant reservoir 20, so that the piston pump 30 and the coolant reservoir 20 are integrated. For this reason, the piping distance of the coolant suction path 300 is short, and the width dimension of the coolant supply device 10 is small. A side cover 33 is provided at a lateral position of the piston pump 30.

A coolant supply path 40 is connected to the discharge port 34 of the piston pump 30, and the coolant supply path 40 is opened and closed at an intermediate position of the coolant supply path 40 to control the supply operation and the stop operation of the coolant C. An air on / off valve 60 (path opening / closing means) is inserted. The coolant supply path 40 has its tip end side extended to the turret head 2 of the machine tool 1.

In this example, the turret head 2 of the machine tool 1 is modified on the tip side of the coolant supply path 40,
As shown in FIG. 6, the nozzle 3 is incorporated in the bush 5 or the like on the tool holder 2a side of the turret head 2,
The tip of the nozzle 3 faces a machining point P between the tool 4 and the workpiece W. The front end side of the coolant supply passage 40 is fixed to the turret box 2b side, and the opening end 40a thereof is the opening end 4 of the passage 41 on the turret head 2 side.
It is in a state of being connected to 1a. Therefore, the nozzle 3 can directly discharge the coolant C supplied through the coolant supply path 40 and the passage 41 toward the processing point P. Here, the turret head 2 is provided with a passage and a nozzle for each attachment position of the tool. When changing the tool to be used, from the state shown in FIG. 6, the turret head 2 once advances in the direction of arrow B and then rotates in the direction of arrow A. For example, even if the state shown in FIG. Another passage 41 of the turret head 2 can communicate with the coolant supply passage 40. In order to prevent liquid leakage when the turret head 2 advances in the direction of arrow B, the coolant supply passage 40 has a valve mechanism 40b on the open end 40a side.

(Operation of Coolant Supplying Device) The operation of the coolant supplying device 10 of this embodiment having the above-described structure will be described.

First, the coolant C is stored in the coolant storage section 20. Also, the air on / off valve 6
0 is in the off state, and the coolant supply path 40 is in the closed state. From this state, the piston pump 30 is operated immediately before the machining is started on the machine tool 1 side.

Next, on the machine tool 1 side, the machining of the workpiece W by the tool 4 is started, and at the same time, the air on / off valve 60 is switched to the on state to open the coolant supply path 40. After that, piston pump 30
Is the coolant suction path 3 from the lower coolant chamber 23.
The coolant C is sucked in through 00 to supply the high-pressure coolant C to the coolant supply path 40. Nozzle 3
Is about 40 kg / cm ² to about 60 kg / cm ^{2 of} the high pressure coolant C supplied through the coolant supply path 40.
It discharges toward the processing point P of the tool 4 and the workpiece W with the discharge pressure of ² . As a result, the coolant C becomes the processing point P.
The tool 4 and the workpiece W are cooled by and the chips are forcibly removed from the tool 4 and the workpiece W. Further, the coolant C discharges the chips by its own pressure and promotes the tool 4 to crush the chips so that the chips 4 can be removed.
And it is made easy to remove from the workpiece W.

After that, the coolant C is collected in a coolant tank or the like provided below the machining area of the machine tool 1, and only coarse chips are removed, and then the coolant is supplied via the valve 201 of the coolant supply device 10. It returns to the storage unit 20.

In the coolant C, coarse chips are first removed when passing through the wire mesh partition plate 213 in the upper coolant chamber 21. The chips mixed in the coolant C are adsorbed by the magnet roller 531 of the magnet separator 53 and removed from the coolant C. The chips adsorbed on the magnet roller 531 are scraped off by the squeegee 532 by the rotation of the magnet roller 531 and are discharged to the chip discharge portion 533 through the upper surface side thereof and collected. Here, the chips are crushed by the pressing roller 535 when passing between the magnet roller 531 and the pressing roller 535, and are collected in the chip discharge portion 533 in a compressed state.

On the other hand, the coolant C passes through the communication pipe 212 and drops into the coolant chamber 22 in the middle stage. Here, the coolant C is a triple filter member 514 of the filter 51,
Filtered at 515,516.

The filtered coolant C is connected to the communication part 222.
Through the sludge collector 54 into the lower coolant chamber 23. Here, the fine chips passing through the filter 51 are adsorbed by the sludge collector 54 and removed from the coolant C.

The coolant C transferred to the lower coolant chamber 23 is sucked into the piston pump 30 via the suction filter 52 and the coolant suction passage 300,
The high-pressure coolant C is supplied again to the machine tool 1.

(Effects of the Embodiment) As described above, the coolant supply device 1 of this embodiment is compact because the coolant reservoir 20 and the piston pump 30 are integrated. Further, since the parts common to the coolant storage section 20 and the piston pump 30 side, such as the housing and the fixed base, can be shared, the number of parts can be reduced.

Further, the coolant supply apparatus 10 according to this embodiment
Has the purpose of extending the life of the tool and promoting the crushing of chips, and the discharge pressure of the coolant C is set to an appropriate value. In addition, the coolant reservoir 20 and the piston pump 3
Since 0 and 0 are integrally formed, the pressure loss due to the coolant suction path 300 between them is small. Therefore, it is not necessary to use an expensive ultra-high pressure pump as the coolant discharge source, and a general pump such as the piston pump 30 is sufficient. Moreover, since the piston pump 30 does not have a big problem even if fine chips are mixed, the filter 5
1, magnet separator 53, sludge collector 54
A small and inexpensive foreign matter removing means such as is sufficient. Also,
Since the filter 51 and the sludge collector 54 are both removable from the coolant chambers 22 and 23, periodical replacement and cleaning are easy. Further, the filter 51
And by removing the sludge collector 54,
The inside of the coolant reservoir 20 can be easily cleaned.

Further, the coolant reservoir 20 is provided with multi-stage coolant chambers 21, 22, 23, and the coolant C is moved by utilizing the fact that the coolant C overflows to the lower stage.
Foreign matter is removed from the coolant C on the way. Therefore, the coolant C in the coolant reservoir 20
Since there is no need for a feed pump for transferring water or a liquid level monitoring device for each coolant chamber, the coolant supply device 1
It is advantageous in downsizing and price reduction of the device.

Further, the coolant reservoir 20 is composed of multi-stage coolant chambers 21, 22, 23, and the pump body 31 and the motor 32 of the piston pump 30 are arranged vertically. Therefore, the coolant supply device 10 is
Since the width dimension and the occupied area are small, the coolant supply device 10 can be easily arranged in the vicinity of the machine tool 1. Also,
It is also easy to integrate the coolant supply device 10 into the machine tool 1.

[0034]

As described above, the coolant supply device according to the present invention is characterized in that the coolant reservoir and the coolant discharge source are integrated. Therefore, according to the present invention, the device can be downsized and the number of parts can be easily reduced, so that the manufacturing cost can be reduced.

In the coolant supply device according to the present invention, the discharge pressure of the coolant is set to an appropriate value for the purpose of extending the service life of the tool and promoting the crushing of chips.
In addition to this, the coolant reservoir and the coolant discharge source are integrated to reduce the pressure loss due to the path between them. Therefore, it is not necessary to use an ultrahigh pressure pump as a coolant discharge source, and a general pump such as a reciprocating pump is sufficient. In addition, since a reciprocating pump such as a piston pump does not cause a big problem even if fine chips are mixed, the foreign matter removing means provided in the coolant reservoir may be a small and inexpensive one using a filter or a magnet.

Further, when a multi-stage coolant chamber is provided in the coolant storage unit and foreign matter is removed from the coolant while dropping the coolant, a coolant feed pump or the like is not required in the coolant storage unit. It is advantageous for downsizing and cost reduction of the coolant supply device. Moreover, since the coolant chambers are superposed on each other, the width of the coolant supply device is small. Therefore, the coolant supply device can be easily arranged near the machine tool. It is also easy to integrate the coolant supply device into the machine tool.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an overall configuration of a coolant supply device according to an exemplary embodiment of the present invention.

FIG. 2 is a front cross-sectional view of a main body side of the coolant supply device shown in FIG.

FIG. 3 is a plan sectional view of the coolant supply device shown in FIG. 1 on the main body side.

FIG. 4 is a side sectional view of a main body side of the coolant supply device shown in FIG.

5 is a plan view of a coolant reservoir of the coolant supply device shown in FIG.

6 is an explanatory diagram schematically showing the configuration of a machining area of a machine tool to which the coolant is supplied from the coolant supply device shown in FIG.

FIG. 7 is an explanatory diagram schematically showing a state in which a machine tool supplied with the coolant from the coolant supply device shown in FIG. 1 is machined by a tool different from that shown in FIG. 6;

FIG. 8 is a configuration diagram of a conventional ultra-high pressure coolant supply device.

[Explanation of symbols]

 1 ... Machine tool 2 ... Turret head 3 ... Nozzle 4 ... Tool 10 ... Coolant supply device 20 ... Coolant reservoir 21, 22, 23 ... Coolant chamber 30 ... Piston pump 40 ... Coolant supply path 50 ... Foreign matter removing means 51 ... Filter 52 ... Suction filter 53 ... Magnet separator 54 ... Sludge collector 60 ... Air on / off valve (path opening / closing means ) 300 ... Coolant suction path 532 ... Squeegee C ... Coolant P ... Processing point W ... Workpiece

Claims (5)

[Claims] 1. A coolant reservoir for retaining coolant to be supplied to a machine tool, a high-pressure coolant discharge source provided integrally with the coolant reservoir for discharging the coolant stored therein, A coolant supply device for supplying a coolant discharged from a coolant discharge source to a machine tool. 2. The coolant supply device according to claim 1, wherein the coolant discharge source is a reciprocating pump. 3. The coolant storage section according to claim 1, wherein the coolant storage section is divided into a plurality of stages from a coolant inlet on an upper side to a coolant outlet on a lower side, and the coolant is self-weighted from an upper stage side to a lower stage side. And a foreign matter removing device capable of removing foreign matter from the coolant between the coolant chamber on the upper stage side and the coolant chamber on the lower stage side. 4. The foreign matter removing device according to claim 3, further comprising: a filtering device for filtering and separating foreign substances from a coolant; and a foreign substance absorbing device for attracting and removing metal scraps from the coolant by magnetic force. Coolant supply device. 5. The passage opening / closing means for controlling a coolant supply operation and a stop operation therethrough according to any one of claims 1 to 4, wherein the coolant supply path is interposed. Characteristic coolant supply device.