JPH10156660A - Coolant supplying device for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coolant supplying device capable of supplying a curtain- shaped coolant band to a part near a machining part of a machine tool, efficiently preventing chips to be scattered from the machining part from being scattered, and cooling a tool. SOLUTION: A horizontal slit 40 is formed on the side wall plate 343 of a coolant storage case 34, coolant discharged from the slit 40 is formed into a band shape from a coolant band forming clearance formed of first and second coolant band-shaped forming plates 41, 42, gutter plates 45 are provided in the position facing both right and left sides of the coolant band forming clearance, both right and left sides of the coolant band are guided downward by the gutter plates 45, 45, and a curtainshaped coolant band C1 whose width is not narrowed is formed.

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 a machine tool, and more particularly, to forming a curtain-like coolant band so that the coolant can be prevented from being scattered to the surroundings and from a processing portion. The present invention relates to a coolant supply device for a machine tool capable of shielding flying chips.

[0002]

2. Description of the Related Art Conventionally, there are the following (a) to (c) as coolant supply devices for a machine tool of this type. (A) In drilling, tapping and milling of a machine tool, a coolant supply nozzle is provided in a machining head for cooling a tool and removing chips during machining, and the coolant is discharged from the nozzle toward a machining portion. In the case of a multi-axis machining head having a large number of tools, a nozzle is provided for each tool in a narrow space.

Further, in a wire saw, a pipe having a slit shape is provided in order to discharge a slurry liquid to a large number of wire groups, and a workpiece, for example, an ingot is sliced. (B) In the multi-axis spindle head structure disclosed in Japanese Utility Model Publication No. 5-18039, a hollow portion is formed around the spindle housing, which is partitioned into front and rear portions by a partition having a gap at the top, and the rear side of the hollow portion. And a discharge pipe for cutting fluid extending from the upper front side of the hollow portion. (C) The cutting oil supply device disclosed in Japanese Utility Model Laid-Open Publication No. 58-181434 is provided with a supply pipe for guiding the cutting oil from a supply source, and stores the cutting oil from the supply pipe above the workpiece mounting position. A storage container is arranged, and the storage container is provided with a plurality of overflow ports through which the cutting oil in the storage container flows down toward the processed portion of the workpiece. Then, cutting oil is supplied from the overflow port toward the processing portion.

[0004]

In the conventional coolant supply device (a), since the coolant supply nozzle is attached to the processing head, the space between the processing head and the work becomes narrower as the processing of the work progresses. May interfere with the work. When the coolant discharged from the coolant supply nozzle hits a tool or a workpiece, there is a problem that the coolant becomes large and small water droplets and scatters around and contaminates the surroundings.

When the coolant supply nozzle is mounted on a fixed portion of a machine tool, even if the processing head approaches the work, the working range of the processing head is set so that the fixed nozzle does not interfere with the processing head. Has to be installed at a location far apart from the nozzle.

In the above case, it is necessary to increase the pressure of the coolant discharged from the nozzle by an amount corresponding to the distance between the nozzle and the processing portion, and as a result, the coolant scatters, and the periphery of the processing portion is soiled.

Further, the conventional coolant supply device (b) also has a problem existing in the above-described supply device (a), and the supply device (c) reduces the scattering of the coolant. Have a problem.

In order to solve the above problem, there is a case where the coolant supply nozzle is not a pipe but a nozzle band 71 having a narrow slit as shown in FIG. In the vicinity of the drop of the band C1, the width of the coolant band C1 becomes narrow due to the influence of the surface tension of the coolant and the area where the coolant hits becomes narrower than the discharge side, so that it is not expected to improve the efficiency of tool cooling and chip removal. There is a problem.

A first object of the present invention is to solve the above-mentioned problems in the prior art, to supply coolant to a processing section in a wide band shape, to efficiently cool a tool and to prevent chips from scattering. It is an object of the present invention to provide a coolant supply device for a machine tool, which can reduce the limitation on the installation space.

A second object of the present invention, in addition to the first object, is to provide a coolant supply device for a machine tool capable of making the thickness of a coolant band uniform.
A third object of the present invention, in addition to the second object, is to provide a coolant supply device for a machine tool capable of adjusting a thickness of a coolant band.

A fourth object of the present invention, in addition to the third object, is to provide a coolant supply device for a machine tool which can easily adjust a gap between movable movable plates with a simple configuration. .

A fifth object of the present invention, in addition to the first object, is to supply a coolant for a machine tool capable of stabilizing the flow of the coolant in the coolant storage box and making the thickness of the coolant zone uniform. It is to provide a device.

A sixth object of the present invention, in addition to the fifth object, is to provide a coolant for a machine tool which can further stabilize the flow of the coolant in the coolant storage box and make the thickness of the coolant zone uniform. To provide a supply device.

A seventh object of the present invention, in addition to the fifth object, is to provide a coolant supply device for a machine tool, which can easily perform a mounting operation to the machine tool. An eighth object of the present invention is to provide a machining method in which coolant is supplied to a machining section in a tubular shape, thereby efficiently cooling a tool and preventing chips from being scattered, and further alleviating a limitation on installation space. It is to provide a coolant supply device for a machine.

[0015]

According to the first aspect of the present invention,
In order to achieve the first object, a slit for discharging coolant to the outside is provided in a coolant storage box which is mounted above a tool of a machine tool and is supplied with coolant from a coolant supply source, and is discharged from the slit. The storage box is provided with a guide member for guiding the left and right sides of the coolant band so as not to be reduced in width.

In the second aspect of the present invention, the second
In order to achieve the above object, the coolant storage box according to claim 1, wherein the coolant storage box is formed in a horizontally long cylindrical shape, and a linear slit is formed in the outer periphery in a horizontal direction, and a lower portion of the slit flows down from the slit. There is provided a coolant band forming gap including a pair of band forming plates for forming the formed coolant into a band shape, and the guide members are provided on both left and right sides of the passage so as to extend below the lower end of the forming path.

According to a third aspect of the present invention, in order to achieve the third object, in the second aspect, the coolant band forming gap includes a fixed band forming plate provided on a side wall of the coolant storage box, A movable band forming plate is provided adjacent to the fixed band forming plate, and the movable band forming plate is capable of adjusting a gap with the fixed band forming plate.

According to a fourth aspect of the present invention, in order to attain the fourth object, in the third aspect, the coolant band forming gap is adjusted by bending the horizontal plate formed by bending the upper portion of the movable band forming plate. It is carried out by a plurality of long holes which are placed on the upper wall plate of the storage box and extend in the front-rear direction provided in the horizontal plate, and a plurality of bolts inserted into each long hole and screwed to the upper wall plate.

According to the fifth aspect of the present invention, the fifth aspect
In order to achieve the above object, in claim 2, a cylindrical coolant supply pipe is penetrated inside the coolant storage box in a longitudinal direction of the storage box, and the coolant supply pipe is provided on a side opposite to the slit. A slit for discharging the coolant in the pipe to the coolant storage box so as to be located is provided in parallel with the slit.

According to a sixth aspect of the present invention, in order to achieve the first object, in the fifth aspect, a partition plate is provided between an upper wall plate of the coolant storage box and an upper outer peripheral wall of a coolant supply pipe. Is arranged so that the coolant discharged from the slit of the coolant supply pipe bypasses the coolant supply pipe below, and then flows upward and is guided to the slit.

[0021] In the invention according to claim 7, the second aspect is provided.
In order to achieve the above object, in claim 5, the coolant storage box is mounted on a machine tool via a mounting plate, and the mounting plate is formed with a window hole through which a tool enters and exits. It is formed so as to cover the hole.

According to an eighth aspect of the present invention, in order to achieve the third object, a coolant storage box mounted above a tool of a machine tool and supplied with a coolant from a coolant supply source surrounds the main shaft. It is formed in a closed annular shape, and a slit for discharging the coolant is formed on the entire circumference.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, one embodiment of the present invention will be described.
Drill and tapping equipment for machine tools Figures 1 to 4
It will be described in detail based on.

FIG. 4 shows a machine tool and a coolant supply device mounted on the machine tool. An outline of the machine tool will be described with reference to FIG. 1. A column 12 is arranged on a base 11 so as to be movable in the front-rear direction and the left-right direction. A spindle head 13 as a processing head is supported on the column 12 so as to be vertically movable. Have been. The main shaft 14 is rotatably supported by the spindle head 13, and a tool 15 such as a drill is detachably mounted at the tip thereof. And the spindle head 13
4, the column 12 is moved toward and away from a work 17 fixed on a jig 16 erected on the base 11 while the main shaft 14 is rotated. The work 17 is subjected to predetermined processing by the tool 15.

The frame 21 is erected on the base 11. The disk-shaped tool magazine 22 is rotatably supported on the upper surface of the frame 21 above the tool on the main shaft 14. A plurality of holding grooves 23 for holding a large number of tools 15 are formed at a predetermined pitch on the outer periphery of the tool magazine 22, and each is opened outward.

The tool pot 24 is detachably held in each holding groove 23 of the tool magazine 22. The frame 21 is provided with a tool changing mechanism 25 so as to be located between the tool magazine 22 and the main shaft 14. The tool changing mechanism 25 is disclosed in, for example, Japanese Patent Application No. 7-372.
Since the structure is almost the same as the structure shown in the specification and the drawings of No. 84, the detailed description is omitted here. The tool changing mechanism 25 selects one of the many tools 15 held in the holding groove 23 on the tool magazine 22.
One of the tools 15a is selected and exchanged with the tool 15 mounted on the spindle 14.

Next, as shown in FIG. 4, a mounting plate 31, which also serves as a protective cover of the tool changing mechanism 25, is supported by a mounting seat 26 supported on the right end of the frame 21 and a column 27 extending from the base 11. Have been. The coolant supply device 3 of the present invention mounted on the mounting plate 31
2 will be described.

As shown in FIG. 2, the base end of the mounting adapter 33 is fixed to the mounting plate 31 by bolts or welding, and the lower end of the adapter 33 is welded and fixed to the upper surface of the coolant storage box 34. The mounting base 35 is fastened and fixed by bolts 36. The coolant storage box 34 is formed in a horizontally long rectangular tube shape as shown in FIGS. 1 and 3, and a coolant supply pipe 37 is supported through end plates 341 welded to both end openings.
One opening of the coolant supply pipe 37 is connected to a coolant supply source (not shown) via a pipe, and excess coolant is returned to the supply source from the other opening. A partition plate 38 for restricting the flow of the coolant C is welded between an upper peripheral portion of the supply pipe 37 and an upper wall plate 342 of the storage box 34. FIG.
As shown in the figure, on the upper right side of the coolant supply pipe 37, a slit 39 for supplying the coolant C in the pipe into the storage box 34 is formed in the storage box 34 by the pipe 3.
7 is formed horizontally over substantially the entire length in the longitudinal direction.

In the coolant storage box 34, slits 40 for discharging the coolant C in the storage box 34 to the outside from the same height position are formed in the upper part of the left side wall plate 343 in FIGS. It is formed in the horizontal direction over almost the entire length in the direction. The surface of the side wall plate 343 of the coolant storage box 34 has a curtain-shaped coolant band C1.
Is attached by spot welding or the like. A second band forming plate 42 is mounted on the storage box 34 so as to cover the slit 40 and the first band forming plate 41. The second band forming plate 42 includes a horizontal plate 421 horizontally supported on the upper surface of the upper plate 342 of the coolant storage box 34, a vertical plate 422 pointing downward from the tip of the horizontal plate 421, and the vertical plate 422. An end plate 423 welded and fixed to both left and right edges of the plate 422. The plurality of long holes 4 provided in the horizontal plate 421
24, the bolt 43 is inserted into the screw hole 344 of the upper plate 342 of the coolant storage box 34 to thereby screw the second band forming plate 42 to the coolant storage box 34.
It is fixed to.

The slit 40 of the coolant storage box 34
The coolant C discharged from the outside to the outside is supplied to the gap G between the both band forming plates 41 and 42, and flows down as a continuous curtain-shaped coolant band C1 downward. The first plate is formed by the long hole 424 and the bolt 43 of the horizontal plate 421.
And the gap G between the second band forming plates 41 and 42 is adjusted,
The thickness of the coolant zone C1 is adjusted by a valve (not shown) for adjusting the amount of coolant supplied to the coolant supply pipe 37.

A mounting plate 44 is fixed to the outer surface of the end plate 423 of the second band forming plate 42 by welding or the like.
The upper part of the gutter plate 45 is joined to 4, and both plates are fastened and fixed by bolts 46 screwed into the screw holes 441 of the mounting plate 44 through the through holes 451 of the gutter plate 45. Gutter 4
The lower part of 5 is joined to the base 11. The double gutter plate 4
4 is a gap G between the first and second band forming plates 41 and 42.
The two band forming plates 41, 4
2 extends further downward from the lower edge. And
The right and left ends of the curtain-shaped coolant band C1 which flows down from the gap G by the two gutter plates 45, 45 are downwardly parallel so that the viscosity and surface tension of the coolant C itself act to prevent the coolant width from becoming narrow. The coolant band C1 is guided toward the tool 15b in a machining state.
Is fed down.

A drain pipe 47 is connected to the bottom of the coolant storage box 34 at two places.
Is screwed. Next, the operation of the coolant supply device 32 of the machine tool configured as described above will be described.

Now, when the work 17 mounted on the jig 16 is to be machined in FIG. 4, the column 12 on the base 11 is moved in the forward (rightward direction in FIG. 4) direction, and the spindle head 13, the main shaft 14 and The tool 15b is moved toward the work 17. Then, the work 17 is processed by the rotating tool 15b. At this time, the coolant supply device 3
The coolant supply box 34 shown in FIG.
The coolant C is supplied from the slit 39 of the storage box 7, the flow velocity is reduced by the partition plate 38, and the coolant C in the storage box 34 is discharged from the slit 40 through the coolant band forming plates 41 and 42.
Is supplied to the gap G, and while flowing down the gap G, the coolant C becomes a belt-like shape. Since both left and right edges of the coolant band C1 are guided downward by the two gutter plates 45, the width of the coolant band C1 in the left-right direction is not reduced by the surface tension of the coolant. The coolant zone C1 flows down to the spindle head 13 or the main shaft 14 and is then guided downward. Therefore, while the processing part for processing the work 17 by the tool 15b is cooled by the coolant,
The processing portion and the spindle head 13 and the column 12 side are shielded by the coolant band C1, so that chips in the processing portion are prevented from being scattered to the head 13 and surroundings.

In the embodiment of the present invention, the following operation and effect can be obtained. (1) In the above embodiment, the coolant storage box 34
A slit G is formed horizontally between the two band forming plates 41 and 42, and a coolant band forming gap G is formed between the two band forming plates 41 and 42. The gutter plate 45 is attached downward from both left and right openings of the gap G.
The pressure of the supplied coolant is set to such a level that the supplied coolant overflows into the storage box 34 and spills out of the slit 39 (for example, about 1.0 kg / cm ² ). Therefore, both ends of the coolant band C1 formed by the gap G are supplied to the processing section without reducing the width of the gutter plate 45 in the left-right direction. Therefore, the cooling of the processing section and the chips flying out of the processing section can be shielded, and the chips are prevented from scattering around the spindle head 13 and the column 12. Also, the coolant storage box 34
In addition, since both band forming plates 41 and 42 can be separated from the processing portion, the degree of freedom of their installation location is increased, and the limitation of the installation space can be eased. (2) In the above embodiment, the coolant storage box 34 is formed in a horizontally long rectangular tube shape, and a linear slit 40 is formed in the side wall plate 343 in the horizontal direction. A coolant band forming gap G that makes the outflow coolant C into a band shape is provided. For this reason, the coolant C discharged from the slit 40 is
, A coolant zone C1 having a uniform thickness is obtained. (3) In the embodiment, since the movable second band forming plate 42 is provided, the thickness of the coolant band C1 can be adjusted by adjusting the coolant band forming gap G. (4) In the above embodiment, the horizontal plate 421 of the movable forming plate 42
Is placed on the upper wall plate 342 of the coolant storage box 34,
An elongated hole 424 provided in the horizontal plate 421 and extending in the front-rear direction.
The gap G is adjusted by the bolt 43 inserted into the elongated hole and screwed to the upper wall plate 342. Therefore, the thickness of the coolant zone C1 flowing down by adjusting the gap with a simple configuration can be easily changed. (5) In the above embodiment, a cylindrical coolant supply pipe 37 penetrates through the coolant storage box 34 in the longitudinal direction of the storage box, and is located on the opposite side of the slit 40 in the coolant supply pipe 37. As described above, the slit 39 for discharging the coolant C in the pipe to the coolant storage box 34 is provided in parallel with the slit 40. or,
The flow rate of the coolant C flowing from the slit 40 to the gap G is made uniform by stabilizing the flow of the coolant C in the coolant storage box 34 by a valve (not shown) for adjusting the amount supplied to the coolant supply pipe 37, and the coolant zone C
1 can be stably made uniform. (6) In the embodiment, the partition plate 38 is interposed between the upper inner wall of the coolant storage box 34 and the upper outer peripheral wall of the coolant supply pipe 37.
The coolant C discharged from the slit 39 is diverted below the coolant storage box 34, so that the flow of the coolant C in the coolant storage box 34 is relaxed and stabilized, and the thickness of the coolant zone C1 is made uniform. Can be (7) In the above embodiment, since the coolant storage box 34 is mounted on the mounting plate 31 which also serves as a protection cover of the machine tool, the coolant supply device 32 to the machine tool is provided.
Can be easily mounted.

The present invention is not limited to the above embodiment, but can be embodied as follows. (A) As shown in FIG. 5, the mounting plate 5 is mounted horizontally on the upper part of the column 51 of the machine tool and is mounted on the mounting table 52.
3 is fixed by bolts 54. Front surface of the vertical plate 532 of the mounting plate 53 (right side surface in FIG. 5)
6, a window hole 533 is formed as shown in FIG.
The milling cutter 56 mounted on 5 is moved forward from the window hole 533 toward the work 17. The coolant supply device 32 is mounted on the front surface of the vertical plate 532 so that the coolant band C1 is supplied to the outer peripheral surface of the milling cutter 56. A block 5 is provided at one end of the coolant storage box 34.
7, and a supply port 58 for supplying a coolant to the pipe 37 is formed on the upper surface thereof.

In this embodiment, the work 17 of the machine tool is used.
Plate 53 having a window hole 533 in the mechanism for supporting
The coolant supply device 32 is mounted via the, but the operation and effect are the same as in the above-described embodiment. (B) As shown in FIG. 7, the coolant storage box 34 is formed in an annular shape so as to surround the spindle head 14, and the cylindrical coolant band C <b> 1 is machined by the drill 15 from the coolant band forming gap G on the upper surface of the work 17. To supply.

In the above embodiment, the coolant storage box 34 is formed in a closed annular shape so as to surround the processing portion, and a coolant band forming gap G is formed on the entire circumference thereof. And cooling of tools,
Scattering of chips can be efficiently prevented, and the restriction on the installation space can be eased. Coolant zone C
Since 1 itself falls under its own weight, the coolant C does not scatter.

[0038]

As described above, according to the first aspect of the present invention, the coolant is supplied in a strip shape to the processing portion, so that the cooling of the tool and the scattering of the chips can be efficiently prevented, and the space for installation is further improved. This has an excellent effect that the restriction can be eased.

According to the second aspect of the invention, in addition to the effect of the first aspect, the thickness of the coolant zone can be made uniform. According to the third aspect of the invention, in addition to the effect of the second aspect, the thickness of the coolant zone can be adjusted.

According to the fourth aspect of the invention, in addition to the effect of the third aspect of the invention, the gap between the movable forming plates can be easily adjusted with a simple configuration. According to the fifth aspect of the invention, in addition to the effect of the first aspect, the flow of the coolant in the coolant storage box can be stabilized and the thickness of the coolant zone can be made uniform.

According to the sixth aspect of the invention, in addition to the effect of the fifth aspect, the flow of the coolant in the coolant storage box can be further stabilized to make the thickness of the coolant zone uniform.

According to the seventh aspect of the present invention, in addition to the effect of the fifth aspect, the work of mounting to the machine tool can be easily performed. According to the eighth aspect of the present invention, the coolant is supplied to the processing section in the form of a tubular band, so that the cooling of the tool and the scattering of the chips can be efficiently prevented, and the restriction on the installation space can be eased.

[Brief description of the drawings]

FIG. 1 is a partially omitted exploded perspective view showing a coolant supply device for a machine tool according to the present invention.

FIG. 2 is a cross-sectional view of a coolant supply device.

FIG. 3 is a longitudinal sectional view of a coolant supply device.

FIG. 4 is a front view of a machine tool equipped with a coolant supply device.

FIG. 5 is a sectional view showing another embodiment of the present invention.

FIG. 6 is a perspective view of the mounting plate and the coolant supply device of FIG. 5;

FIG. 7 is a longitudinal sectional view showing another embodiment of the present invention.

FIG. 8 is a front view showing a conventional example.

[Explanation of symbols]

32: coolant supply device, 33: mounting adapter, 34
... Coolant storage box, 37 ... Coolant supply pipe, 3
9: slit, 40: slit, 41, 42: first and second coolant band forming plates, 45: gutter plate.

Claims (8)

[Claims] 1. A coolant storage box, which is mounted above a tool of a machine tool and is supplied with coolant from a coolant supply source, is provided with slits for discharging coolant to the outside, and left and right sides of a coolant band discharged from the slits. A coolant supply device for a machine tool, characterized in that a guide member for guiding the storage box so as not to be reduced is provided in the storage box. 2. The coolant storage box according to claim 1, wherein the coolant storage box is formed in a horizontally long tubular shape, and a linear slit is formed in an outer periphery thereof in a horizontal direction, and a coolant flowing down from the slit is formed below the slit. A coolant for a machine tool, wherein a coolant band forming gap formed by a pair of band forming plates to be formed in a band shape is provided, and the guide members are provided on both left and right sides of the passage so as to extend below the lower end of the forming path. Feeding device. 3. The coolant band forming gap according to claim 2, wherein the coolant band forming gap includes a fixed band forming plate provided on a side wall of the coolant storage box, and a movable band forming plate provided close to the fixed band forming plate. Wherein the movable band forming plate is capable of adjusting a gap between the movable band forming plate and the fixed band forming plate. 4. The cooling band forming gap according to claim 3, wherein a horizontal plate bent and formed on an upper portion of the movable band forming plate is placed on an upper wall plate of the coolant storage box and provided on the horizontal plate. A plurality of elongated holes extending in the front-rear direction, and a plurality of bolts inserted into the elongated holes and screwed to the upper wall plate to perform coolant supply for a machine tool. 5. The coolant supply box according to claim 2, wherein a tubular coolant supply pipe is penetrated in the coolant storage box in a longitudinal direction of the storage box, and the coolant supply pipe is located on a side opposite to the slit. A coolant supply device for a machine tool, wherein a slit for discharging a coolant in a pipe to a coolant storage box is provided in parallel with the slit. 6. The coolant according to claim 5, wherein a partition wall plate is interposed between an upper wall plate of the coolant storage box and an upper outer peripheral wall of the coolant supply pipe, and the coolant discharged from a slit of the coolant supply pipe is used as the coolant. A coolant supply device for a machine tool configured to be detoured below a supply pipe and then flow upward and be guided to a slit. 7. The coolant storage box according to claim 5, wherein the coolant storage box is mounted on a machine tool via a mounting plate, a window hole through which a tool enters and exits is formed in the mounting plate, and a coolant band covers the window hole. A coolant supply device for a machine tool that is shaped to perform. 8. A coolant storage box mounted above a tool of a machine tool and supplied with coolant from a coolant supply source is formed in a closed annular shape so as to surround a main shaft, and a slit for discharging coolant is formed around the entire circumference thereof. Coolant supply device for machine tool being formed.