JP2001198768A - Coolant discharging device of machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain chips from scattering as well as to efficiently cool a cutting part. SOLUTION: A discharge ring 14 having many nozzles 17 communicated with an annular passage 15 and opened forward is provided on the approximately whole range of the circumferential part of a ring body 14a having the annular passage 15, the discharge ring 14 is coaxially provided on a casing 10 for supporting a spindle 11, and coolant is pressure-fed to the passage 15 of the discharge ring 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool for machining a work end face or drilling a work by attaching a cutting tool to a spindle, and more particularly to a machine for discharging a coolant (coolant) toward a cutting portion of the work. The present invention relates to a coolant discharge device for a machine.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show a conventional technique. In FIG. 5, reference numeral 1 denotes a shaft center and a spindle 2
Is rotatably supported at the rear end (FIG. 5).
Has a large-diameter rear flange 1a at its right end.
A cylindrical casing cover 3 is provided on the outer periphery of the casing 1.
And the rear end thereof abuts on the rear flange 1a. The seal flange 4 is fitted to the front of the cover 3 and the ring body 5 is fitted to the front of the seal flange 4 coaxially. It is fixed to the casing 1.

From the rear flange 1a, flow paths 1b, 3a, 4a, 5a communicating in the axial direction toward the casing cover 3, the seal flange 4, and the ring body 5 are formed.
The supply hose 7 to which the coolant is pressure-fed is connected to the flow path 1b of the rear flange 1a. Flow path 5 of the ring body 5
a is formed annularly on the rear surface of the ring body 5, and as shown in FIGS. 5 and 6, six nozzles 6 communicating with the flow path 5a are provided on the front surface of the ring body 5 at equal pitches in the circumferential direction. Attach.
Each nozzle 6 has a hole diameter of about 3 mm, is mounted on the ring body 5 via a spherical bearing so as to be rotatable about the longitudinal axis, and the discharge direction of the coolant discharged from each nozzle 6 is directed to the processing portion. So that it can be adjusted appropriately.

[0004]

In the prior art, the nozzles 6 for discharging the coolant are arranged at a large pitch in the circumferential direction, so that the discharge range of the coolant is limited, and the shape of the blade is different, or Whenever the number of blades increases, it is necessary to change the direction of the nozzle 6 each time. In addition, the coolant discharged from each nozzle 6 could not surround the periphery of the processing portion, and chips were easily scattered around. SUMMARY OF THE INVENTION It is an object of the present invention to provide a new coolant discharge device for a machine tool, which solves the above-mentioned problem by surrounding the periphery of a processing portion with a coolant.

[0005]

Means for Solving the Problems The present invention is configured as follows to achieve the above object. That is, the invention according to claim 1 provides a discharge ring provided with a large number of nozzles communicating with the flow passage and opening forward substantially in the entire circumferential portion of the ring body having the annular flow passage. Provided,
The discharge ring is provided coaxially on a casing supporting the spindle, and the coolant is pressure-fed to the flow path of the discharge ring. According to a second aspect of the present invention, the discharge ring is provided on a front surface of a casing that supports a spindle. According to a third aspect of the present invention, the discharge ring is fitted and fixed to an outer periphery of a casing supporting a spindle. Claim 4
The nozzle according to the present invention is characterized in that the nozzles of the discharge ring are small-diameter nozzles scattered at small intervals over substantially the entire region in the circumferential direction, and large-diameter nozzles arranged at large intervals in the circumferential direction.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a partial sectional side view showing a first embodiment of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a partial sectional side view showing a second embodiment of the present invention, and FIG. It is a front view of No. 3.

In FIG. 1, reference numeral 10 denotes a casing which rotatably supports a spindle 11 at an axial center, and has a large-diameter rear flange 10a at a rear end (right end in FIG. 1). A cylindrical casing cover 12 is fitted to the outer periphery of the casing 1 and the rear end thereof is connected to the rear flange 1.
0a, a seal flange 13 is provided at the front of the cover 12, and a discharge ring 14 is provided at the front of the seal flange 13.
Are coaxially stacked and fitted and fixed to the front part of the casing 10.

The discharge ring 14 has annular first and second flow paths 15 and 16 formed at the outer periphery of the rear surface and the inner periphery of the rear surface of the ring body 14a, and at the front side of the ring body 14a. A small diameter communicating with the first flow path 15, for example, a hole diameter of about 1 m
m, and a second nozzle 18 having a large diameter, for example, a hole diameter of about 3 mm. The first nozzle 17 is a fixed nozzle parallel to the axis of the spindle 11 and has a diameter of about 1 m.
For example, 90 rings are formed in substantially the entire area of the front wall of the ring body 14a by m cones. The first nozzle 17 may be slightly inclined in the circumferential or radial direction with respect to the axis of the spindle 11.

The second nozzle 18 is a movable nozzle, and is mounted on the front wall of the ring body 14a via a spherical bearing so as to be rotatable about a longitudinal axis.
The discharge direction of the coolant discharged from the discharge port 8 can be appropriately adjusted. Also, the first flange 10a, the casing cover 12, and the seal flange 13 are attached to the first flange.
A first supply path 20 and a second supply path 21 which are individually communicated with the flow path 15 and the second flow path 16 are formed, and first and second pumps for supplying coolant to the first and second supply paths 20 and 21 are provided. Supply hoses 22 and 23 are connected. The first and second supply hoses 22 and 23 are individually operated first and second on-off valves 2.
It is opened and closed by 4,25.

According to the first embodiment, when the first and second opening / closing valves 24 and 25 are opened, the coolant becomes first and second.
Second supply hoses 22, 23, first and second supply paths 20, 2
The coolant is supplied to the first and second flow paths 15 and 16 via the first nozzle 1, and the coolant is discharged from the first and second nozzles 17 and 18 in a tubular shape surrounding the periphery of the spindle 11. Become. For this reason, the discharge range of the coolant is widened, and the blades and the cutting portion of the work are efficiently cooled without being influenced by the blades having different shapes or the number of blades. In addition, the cylindrical coolant surrounds the cutting tool and the cutting portion and suppresses the generation of chips generated from the cutting portion in the outer peripheral direction. Further, since the discharge range of the coolant is widened, the cleaning function of the work and the jig is enhanced, and chips are hardly attached to these.

In this case, by adjusting the direction of the second nozzle 18, the coolant can be locally concentrated and discharged to a required portion of the workpiece at the cutting portion. In addition, by selecting and opening and closing the first and second on-off valves 24 and 25, the coolant can be discharged from only one of the first and second nozzles 17 and 18, which corresponds to the type of processing. The discharge form of the coolant can be changed. In FIGS. 1 and 2, reference numeral 26 denotes an O-ring interposed between members forming each flow path and each supply path.

FIGS. 3 and 4 show a second embodiment. In this embodiment, the discharge ring 14 is fitted and fixed to the outer periphery of the front part of the casing 10. That is, a front ring body 14b and a rear ring body 14c that are divided into two parts are formed, and an annular first flow path 15a is formed on the rear surface of the front ring body 14b.
For example, about 90 first nozzles (fixed nozzles) 17a having a hole diameter of about 1 mm and communicating with the first flow path 15a are formed in substantially the entire area on the front side of the front ring body 14b.
Also, the first ring is provided at one location in the circumferential direction of the rear ring body 14c.
A supply port 20a communicating with the flow path 15a is formed, and a first supply hose 22a for pressure-feeding the coolant is connected to the supply port 20a.

[0013] In addition, six second
Nozzles (movable nozzles) 18a are equally arranged in the circumferential direction and attached, and an annular second flow path 16a communicating with each of the second nozzles 18a is formed inside the front wall of the casing 10,
Further, a second supply passage 21a penetrating in the axial direction is formed at one circumferential position of the peripheral wall of the casing 10, and a second supply hose 23a for pressure-feeding the coolant is connected to a rear portion of the second supply passage 21a. The second nozzle 18a has a hole diameter of about 3 mm as in the first embodiment, and is rotatable about a longitudinal axis via a spherical bearing. Further, the first and second supply hoses 22a, 23
a is opened and closed by first and second on-off valves 24a and 25a which operate individually. The other structure is the same as that of the first embodiment.

According to the second embodiment, the discharge ring 14
Is fitted and fixed to the outer periphery of the front part of the casing 10, and the first
Since the supply hose 22a is connected, the supply hose 22a can be easily attached to the existing casing 10, and the remodeling cost is reduced. Note that the discharge ring 14 described above is used.
In this case, the pipe may be formed in a ring shape, and a number of small holes, that is, nozzles may be formed all around the front wall of the ring-shaped pipe.

[0015]

As is apparent from the above description, claim 1
In the invention according to the invention, a discharge ring having a large number of nozzles opening forward is provided in substantially the entire area of the circumferential portion, and the discharge ring is attached to the casing of the spindle so that the coolant is discharged from each of the nozzles. Then, the coolant is formed in a tubular shape surrounding the periphery of the spindle and is discharged forward, so that the discharge range of the coolant is widened. For this reason,
The cutting tool and the cutting portion of the work are efficiently cooled without being affected by the number of the cutting tools having different shapes or the cutting tools, and the cylindrical coolant surrounds the cutting tool and the cutting portion to scatter the chips. Will be suppressed. Further, since the discharge range of the coolant is widened, the cleaning function of the work and the jig is enhanced, and chips are hardly attached to these.
Further, in the invention according to claim 2, since the discharge ring is provided on the front surface of the casing that supports the spindle, each nozzle approaches the periphery of the cut portion of the work, and cooling of the cut portion is performed.
In addition, the scattering of the chips is more effectively suppressed. The invention according to claim 3 is that the discharge ring is
Since it is fitted and fixed to the outer periphery of the casing that supports the spindle, it can be easily attached to the existing machine tool, and the remodeling cost is reduced. The invention according to claim 4 is characterized in that the nozzles of the discharge ring are divided into small-diameter nozzles scattered at small intervals over substantially the entire area in the circumferential direction, and large-diameter nozzles arranged at large intervals in the circumferential direction. Therefore, it is possible to discharge a large amount of coolant to the cutting portion and to cool the cutting portion satisfactorily while suppressing scattering of the chips in the outer peripheral direction.

[Brief description of the drawings]

FIG. 1 is a partial sectional side view showing a first embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a partial sectional side view showing a second embodiment of the present invention.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a partial sectional side view showing a conventional example.

FIG. 6 is a front view of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Casing 10a Rear flange 11 Spindle 12 Casing cover 13 Seal flange 14 Discharge ring 14a Ring body 14b Front ring body 14c Rear ring body 15, 15a First flow path 16, 16a Second flow path 17, 17a First nozzle 18, 18a second nozzle 20, 20a first supply path 21, 21a second supply path 22, 22a first supply hose 23, 23a second supply hose 24, 24a first on-off valve 25, 25a second on-off valve 26 O-ring

Claims (4)

[Claims] A ring body (1) having an annular flow path (15).
A discharge ring (14) provided with a large number of nozzles (17) communicating with the flow path (15) and opening forward is provided in substantially the entire area of the circumference of 4a).
4) a casing (1) supporting a spindle (11);
A coolant discharge device for a machine tool, wherein the coolant is pressure-fed to a flow path (15) of the discharge ring (14). 2. The discharge ring (14) is connected to a spindle (1).
The coolant discharge device for a machine tool according to claim 1, wherein the coolant discharge device is provided on a front surface of a casing (10) that supports (1). 3. The discharge ring (14) is connected to a spindle (1).
2. A coolant discharge device for a machine tool according to claim 1, wherein said coolant discharge device is fitted and fixed to an outer periphery of a casing (10) supporting said (1). 4. The nozzle (17) of the discharge ring (14)
Small-diameter nozzles (1
The coolant discharge device for a machine tool according to any one of claims 1 to 3, further comprising: (7) a large-diameter nozzle (18) arranged at a large interval in a circumferential direction.