JP2926225B2 - Coolant purification equipment for machine tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coolant purifying apparatus for a machine tool for removing metal powder mixed in a coolant.

[0002]

2. Description of the Related Art As a conventional technique, a tank for storing a coolant is installed outside a machine, a filter such as a net or a perforated plate is attached to an inlet of the tank, and a coolant flowing out of a machine tool is passed through the filter to a tank. In some cases, chips that have entered the coolant are removed by the filter, and the coolant from which the chips have been removed is supplied to the machine tool again.

[0003]

In the above-mentioned conventional apparatus, fine metal powder (cutting chips) is hardly caught by a filter, and this metal powder is mixed into a coolant and supplied to the machine tool again. . SUMMARY OF THE INVENTION It is an object of the present invention to provide a novel coolant purifying apparatus for a machine tool that has solved the above-mentioned problems.

[0004]

Means for Solving the Problems The present invention is configured as follows to achieve the above object. That is, a flow path through which a coolant flows is formed in the casing, a separation chamber is provided in the middle of the flow path, a non-magnetic cylinder is inserted into the separation chamber in a transverse manner, and one end of the cylinder is formed. Projecting outward from the separation chamber, a movable body having a magnet in the cylinder is slidably fitted toward one end and the other end of the cylinder, and the flow member is positioned upstream of the separation chamber. A valve hole communicating with the path and a drain hole communicating with the outside are provided, and a switching valve that alternately opens and closes the valve hole and the drain hole is provided, and when the moving body is moved in the retreat direction from the separation chamber, A drive device is provided for moving the switching valve in the direction of closing the valve hole, and for moving the switching valve in the direction of closing the drain hole when moving the moving body toward the separation chamber. In this case, a bypass passage communicating with the separation chamber may be provided in the passage located on the upstream side of the valve hole. Further, it is preferable that the bottom wall of the separation chamber is inclined downward toward the drain hole.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a partial sectional side view showing a state of capturing metal powder according to the present invention, and FIG. 2 is a sectional side view showing a state of collecting the metal powder. 1 and 2, reference numeral 1 denotes a coolant purifying device, and reference numeral 2 denotes a casing thereof. The casing 2 is formed of, for example, an aluminum alloy material, and inside thereof forms a passage 3 through which the coolant flows from the left to the right in FIG. 1, and the left inlet 3a and the right outlet 3b have a small diameter. A female screw is formed on the inner periphery, and a hose (not shown) through which coolant flows is connected to this portion.

[0006] A large-diameter separation chamber 4 is formed in the middle part of the flow path 3 in the left-right direction, that is, the middle part of the casing 2, and a cylinder 5 is vertically inserted into the separation chamber 4. The cylindrical body 5 is formed of a nonmagnetic material such as stainless steel into a cylindrical shape having a predetermined diameter smaller than the diameter of the separation chamber 4, and a lower part thereof is projected downward from the separation chamber 4, and an outer peripheral portion of the lower part is formed. The cylindrical body 5 is held by being surrounded by a cup-shaped lower case 6 fixed to the lower part of the casing 2 by bolts, and a cylinder chamber 7 is formed in the cylindrical body 5.

A moving body (piston) is placed in the cylinder chamber 7.
10 is slidably fitted in the vertical direction. This moving object 1
Numeral 0 denotes a disc-like shape in which a large number of vertically elongated magnets (permanent magnets) 12 are arranged at a predetermined pitch in the circumferential direction on the outer peripheral portion of a cylindrical holder 11 and are fixed to upper and lower ends of the holder 11 by bolts 14. Each of the magnets 1 with the heads 13a and 13b
2 is sandwiched. Reference numeral 15 denotes an O-ring for sealing provided on each of the heads 13a and 13b.

The length of the movable body 10 is substantially equal to the vertical height of the separation chamber 4, and the length of the lower part of the cylindrical body 5 projecting downward from the separation chamber 4 is equal to the length of the movable body. Body 10
When the moving body 10 moves to the cylindrical body 5, that is, the lower part of the cylinder chamber 7, the magnet 12 provided in the moving body 10 is positioned below the separation chamber 4. To do it. Operating air supply ports 8, 9 are formed in the case 2 and the lower case 6 facing the heads 13a, 13b, and the moving body 10 is supplied by alternately supplying compressed air to the supply ports 8, 9. Move up and down.

The bottom wall 4a of the separation chamber 4 is inclined downward at an angle of about 15 degrees to the left, and the left end (lower end) of the bottom wall 4a is vertically communicated with the separation chamber 4. Hole 1
5 is formed. A valve hole 16 communicating with the inflow port 3 a is formed on the upper side of the communication hole 15, and a drain hole 17 communicating with the outside is formed on the lower side of the communication hole 15 to be coaxial with the upper and lower sides thereof. A switching valve 18 for alternately opening and closing the valve hole 16 and the drain hole 17 is provided.

The switching valve 18 is a pneumatic type in which a valve element 18a is fitted in the communication hole 15 so as to be vertically movable, and a valve rod (rod) 18b supporting the valve element 18a is mounted on an upper portion of the casing 2. It is connected to the piston 26 of the drive cylinder 25. The valve element 18a closes the valve hole 16 and opens the drain hole 17 when moved upward, and closes the drain hole 17 and opens the valve hole 16 when moved downward.
In addition, a small-diameter bypass flow passage 19 communicating from the inflow port 3 a toward the separation chamber 4 is provided above (upstream of) the valve hole 16.
To form When the valve hole 16 is closed, the coolant that has flowed into the inflow port 3a is transferred to the cylindrical body 5 when the valve hole 16 is closed.
To discharge the metal powder (A) attached to the outer peripheral surface of the cylindrical body 5.

The moving body 10 and the switching valve 18 described above are operated by the driving device 20 as follows. That is, the compression passage 22 of the compression pump (compressed air supply source) 21 is connected to the first compression passage 22 a and the second compression passage 2 by the electromagnetic drive switching valve 23.
2b. The first compression passage 22a is provided with a supply port 9 formed on the lower side of the cylinder 5 and the drive cylinder 2
5 in parallel. Also, the second compression path 22b
Are connected in parallel to the supply port 8 formed on the upper side of the cylindrical body 5 and the upper chamber of the drive cylinder 25. Drive device 20
When the machining command is issued to the machine tool, the drive switching valve 2
3 is operated in the direction in which the compression passage 22 is connected to the first compression passage 22a, and when the machining command is released, the drive switching valve 23 is connected to the compression passage 22 on the second compression passage 22b side. It is designed to operate in the direction that is performed.

According to the present invention, when a machining command is issued to a machine tool, the compression path 22 of the compression pump 21 is changed.
Is connected to the first compression passage 22a side, and the moving body 10 is
Is moved to the upper side to generate a magnetic force on the upper side of the cylindrical body 5, the valve body 18a of the switching valve 18 is moved to the lower side, and the valve hole 16 opens and the drain hole 17 closes. As a result, as shown in FIG. 1, the coolant flowing from the inlet 3a flows into the separation chamber 4 through the valve hole 16 and the communication passage 15, comes into contact with the upper part of the cylinder 5, and at this portion, the coolant (A) is adsorbed on the upper side of the cylindrical body 5 and then flows out from the outlet 3b toward the blade portion of the machine tool. Therefore, clean coolant is supplied to the blade portion of the machine tool.

When the machining command is released, the compression passage 22 of the compression pump 21 is connected to the second compression passage 22b, the moving body 10 is moved to the lower side of the cylinder 5, and the switching valve is switched. The 18 valve element 18a is moved to the upper side, the valve hole 16 is closed, and the drain hole 17 is opened. As a result, as shown in FIG. 2, the metal powder (A) adsorbed on the outer peripheral surface of the cylindrical body 5 is moved along the cylindrical body 5 by the magnetic force of the magnet 12 of the moving body 10 toward the bottom wall 4a of the separation chamber 4. Is moved to
The magnetic force on the upper side of the cylinder 5 is released. In addition, the coolant is ejected from the bypass flow passage 19 to cause the metal powder (A) attached to the upper surface of the cylindrical body 5 and the bottom wall 4 a of the separation chamber 4 to flow toward the drain hole 17. The operation of the drive switching valve 23 may be manually performed.

[0014]

As is apparent from the above description, the present invention can efficiently remove fine metal powder. In addition, since the non-magnetic cylinder is inserted into the separation chamber in a transverse direction, and the moving body having the magnet is moved in the cylinder, the metal powder does not directly contact the magnet, and the operation of the moving body is reduced. It has effects such as stabilization over a long period of time.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view showing a state of capturing metal powder according to the present invention.

FIG. 2 is a sectional side view showing a state of collecting metal powder according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coolant purification apparatus 2 Casing 3 Flow path 3a Inflow port 3b Outflow port 4 Separation chamber 4a Bottom wall 5 Cylindrical body 6 Lower case 7 Cylinder chamber 8, 9 Air supply port 10 Moving body 11 Holder 12 Magnet 13a, 13b Head 15 Communication Hole 16 Valve hole 17 Drainage hole 18 Switching valve 19 Bypass flow path 20 Drive device 21 Compression pump 22 Compression path 22a First compression path 22b Second compression path 23 Drive switching valve 25 Drive cylinder 26 Piston (A) Metal powder (chip) )

Claims (3)

(57) [Claims] 1. A flow path (3) through which a coolant flows is formed in a casing (2) and a separation chamber (4) is provided in the middle of the flow path (3). A cylindrical body (5) is inserted transversely, and one end of the cylindrical body (5) is projected outward from the separation chamber (4), and a magnet (12) is placed in the cylindrical body (5). A movable body (10) having the cylindrical body (5) is slidably fitted to one end and the other end of the cylindrical body (5), and communicates with the flow path (3) upstream of the separation chamber (4). The valve body (16) and a drain hole (17) communicating with the outside are provided, and a switching valve (18) for alternately opening and closing the valve hole (16) and the drain hole (17) is provided. 1
0) in the retreat direction from the separation chamber (4), the switching valve (18) is moved in the closing direction of the valve hole (16),
And a drive device (20) for moving the switching valve (18) in the direction of closing the drain hole (17) when moving the moving body (10) toward the separation chamber (4). Coolant purification equipment for machine tools. 2. A bypass passage (19) communicating with the separation chamber (4) is provided in a passage (3) located upstream of the valve hole (16). 2. The coolant purifying apparatus for a machine tool according to claim 1. 3. The coolant purifying device for a machine tool according to claim 1, wherein a bottom wall (4a) of the separation chamber (4) is inclined downward toward the drain hole (17).