JPH09285939A - Dust collector for machine tool head part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate chips from a workpiece, promote discharge of the chips to a dust flow passage, and prevent great increase in costs by arranging a fan letting air flow in a tool rotary shaft in the upper part of a tool. SOLUTION: A motor is vertically installed inside a cylindrical casing 2 of a head. A tool fastening apparatus 4 connected to a rotary shaft 31 in the motor 3 is protruded downward from the lower face center part, of the casing 2, and a tool 5 such as an end mill and a drill is fastened removably. A dust flow passage 6 passing through in the vertical direction is arranged in the casing 2. A fan 9 letting air flow is arranged in the rotary shaft 31 for the tool 5 in the upper part of the tool 5. When a workpiece 51 is machined, chips generated from a cutting part are sucked from the dust flow passage 6 side, and at the same time, the fan 9 rotating with the tool 5 together sucks air from the outside through an air inlet passage 92 so as to blow air toward the tool 5. Therefore, chips generated in the cutting part are excellently eliminated and discharged to the dust flow passage 6 side smoothly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting device for a head portion of a machine tool for sucking and removing chips generated from a cutting portion of a tool attached to a lower portion of the head.

[0002]

2. Description of the Related Art Japanese Patent Application No. 6-9052
There is a dust collecting device for a machine tool head described in the specification No. 0 and the drawings. This is roughly configured as follows. That is, a head is supported by a cross rail or a column of a machine tool so as to be movable up and down, and a motor is installed upside down inside a cylindrical casing of the head. A tool fastener connected to the rotary shaft of the motor is provided so as to project downward from the center of the lower surface of the casing, and a tool such as an end mill or a drill is detachably fastened to the tool fastener. .

A dust flow passage is formed in the casing so as to penetrate therethrough in the vertical direction. The dust flow passage passes through a plurality of locations on the outer peripheral portion of the motor from the lower portion of the casing and is gathered at the upper portion of the casing. A hose communicating with the suction duct is connected to the upper end of the casing.

A cylindrical dust collecting cover is fitted and locked downward on the outer periphery of the lower portion of the casing, and a brush-like skirt member hangs in an annular shape on the lower peripheral edge of the dust collecting cover. The skirt member is supported and surrounds the tool fastener and the outer peripheral portion of the tool fastened to the tool fastener.

An air supply pipe connected to the discharge port of the air pump is drawn into the inside of the dust collecting cover. When removing the chips generated from the cutting part of the tool by suction from the dust flow passage side, the air pump is operated to discharge the compressed air into the dust collecting cover, and the chips of the cutting part of the tool are well removed. The chips are removed and suspended and the chips are smoothly removed.

[0006]

However, in the above-mentioned conventional device, as described above, it is necessary to install a special air pump for sending the compressed air into the dust collecting cover. Therefore, there is a problem that the cost of the device is increased. Therefore, an object of the present invention is to satisfactorily remove chips from the work piece, to promote the discharge of chips to the dust flow passage, and not to cause a significant increase in the cost of the machine tool. To provide a dust collector.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a head having a tool fastener is provided at the center of the lower surface, a tool is attached to the lower portion of the tool fastener, and the tool is engaged with the outer periphery of the head and the lower portion is removed from the head. A process in which a cylindrical dust collecting cover which projects downward and surrounds the outer peripheral portion of the tool fastener is provided, and an upper part is connected to a suction duct and a lower part is provided with a dust flow passage opening to the upper part inside the dust collecting cover. In a dust collector for a machine head, by providing a dust collector for a machine head, wherein a fan that allows air to flow is provided on the rotary shaft of the tool in the upper part of the tool, The above object is achieved.

[0008]

In the dust collecting apparatus for the head portion of the machine tool of the present invention, when the workpiece is processed, the chips generated from the cutting portion of the tool are sucked from the dust flow passage side, and at the same time, the fan rotates together with the tool. Blows downward in the tool direction, satisfactorily removes chips from the cutting portion of the tool, and smoothly removes them to the dust flow passage side. Further, when processing a workpiece, the chips generated from the cutting part of the tool are sucked from the dust flow passage side, and at the same time, the above-mentioned fan of a type different from that described above blows air upward from the tool to distribute dust. The suction force from the road side is increased and chips are smoothly removed to the dust flow path side.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a dust collecting apparatus for a machine tool head according to the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention, FIG. 1 is a partial sectional side view thereof, FIG. 2 is an enlarged sectional side view of a main part of the dust collector shown in FIG. 1, and FIG. It is a partial cross section bottom view of the dust collector shown in FIG.

As shown in FIG. 1, the dust collecting device for the head portion of the machine tool of this embodiment has a head 1 supported by a cross rail or column (not shown) of the machine tool so as to be vertically movable.
In a cylindrical casing 2 of the head 1, a motor 3 is installed upside down. A tool fastener 4 (see FIG. 2) connected to the rotation shaft 31 of the motor 3 is provided so as to project downward from the center of the lower surface of the casing 2, and the tool fastener 4 includes a tool 5 such as an end mill or a drill. Is detachably fastened.

A dust flow passage 6 is formed in the casing 2 so as to vertically penetrate therethrough. The dust flow passage 6 passes from a lower portion of the casing 2 to a plurality of outer peripheral portions of the motor 3 and an upper portion of the casing 2. The hose communicating with the suction duct is connected to the upper end of the casing 2 (not shown).

A dust collecting cover 7 made of a light alloy, the upper portion of which is formed in a rectangular shape in plan view and the lower portion of which is formed in a cylindrical shape, is fitted and locked downward to the outer periphery of the lower portion of the casing 2, and A flexible brush-shaped skirt member 8 is hung and supported in an annular shape on the lower peripheral edge of the dust cover 7, and the tool fastener 4 and the tool 5 fastened to the tool fastener 4 are supported by the skirt member 8. The outer peripheral portion is surrounded.

The dust collecting cover 7 is engaged with two opposite sides (two sides orthogonal to the paper surface of FIG. 2) of the outer periphery of the lower portion of the casing 2 via a rack-shaped engagement projection 21. Inside the right side of the dust collecting cover 7, an engaging claw 71 is rotatably connected by a pin 72 and is urged to rotate in an engaging direction (leftward) by a spring 73. The dust collecting cover 7 is detachably coupled to the casing 2 by rotating the 71 inward and outward with the lever 74 to engage and disengage the engaging protrusion 21 on the casing 2 side. The points described above are the same as the configuration of the conventional dust collecting apparatus for the machine tool head.

Thus, in the dust collecting apparatus for the machine tool head of this embodiment, as shown in FIG. 2, the fan 9 for flowing air on the rotary shaft 31 of the tool 5 above the tool 5 is used. Is provided.

The dust collecting device for the head portion of the machine tool of this embodiment will be further described. The fan 9 is provided so as to blow downward toward the tool 5 as shown in FIG. A guide 91 is provided so that the wind inside the blower guide 91 is guided toward the tool 5 and the wind outside the blower guide 91 is directed toward the dust flow passage 6.

The fan 9 is attached to the tool 5 by the nut 93.
It is fixed to the rotary shaft 31 of. That is, the boss portion of the fan 9 is inserted and fitted into the rotary shaft 31 from below, and the nut 93 is raised from below from the male screw provided on the lower portion of the rotary shaft 31 while being screwed up to rotate the boss portion. It is fastened and fixed between the shaft 31 and the upper step.

Further, the blower guide 91 is provided in a cylindrical shape having a substantially inverted conical shape, and an opening portion on the tool 5 side is provided so as to have a predetermined gap with the tool fastener 4 inside thereof. By narrowing the opening, a strong airflow is ejected from this opening, and the nozzle is configured to blow off the chips of the cutting portion of the tool 5 favorably.

Further, since the air introducing passage 92 for supplying the air sent from the fan 9 is provided so as to communicate the inside of the blower guide 91 with the outside of the dust collecting cover 7, the fan 9 is thereby provided. Does not suck the air inside the dust collecting cover 7, but sucks the outside air. That is,
Without the air introducing passage 92, the fan 9 also sucks up air rising from the vicinity of the cutting portion of the tool 5, but chips are included in this rising air flow. The fan 9 sucks the contained air and returns it to the lower side again,
It will be recycled. However, in this embodiment, since the air introduction passage 92 that communicates with the outside of the dust collecting cover 7 is installed, the outside air is introduced and the recirculation can be prevented. Further, when the entire surface of the brush 8 is brought into contact with the surface of the processed material for processing, the dense brushes 8 bring the inside of the dust collecting cover 7 into a state close to a vacuum, which deteriorates the air flow and lowers the dust collecting effect. In this embodiment, since the air is introduced from the outside, the flow of the air is not deteriorated and the dust collection effect can be prevented from lowering.

Further, as shown in FIGS. 2 and 3, the air introduction passage 92 is formed by notching the opening end (lower end) of the fan rear cover 94 at three equiangular intervals in the circumferential direction, and cutting out the notched portion. The outlets 92a are provided so as to cross each other and are inclined with respect to the radial direction of the fan 9, and the outlets 92a thereof are directed to the downstream side in the rotation direction of the fan 9.

As shown in FIG. 2, a bottomed cylindrical fan rear cover 94 is fixed to the bearing block 95 on the upper side of the fan 9 with its opening side facing downward. The fan rear surface cover 94 extends downward except for the air introduction passage 92, and is provided so as to be wrapped with the cylindrical portion of the blower guide 91 with a slight gap therebetween.
A rising air flow including chips rising from the vicinity of the cutting portion of the tool 5 is prevented from entering the fan rear cover 94.

In the machine tool head dust collector of the present embodiment having the above-described structure, when the workpiece 51 is machined, the chips generated from the cutting portion of the tool 5 are treated as the dust flow passage 6 Simultaneously with the suction from the side, the fan 9 rotating with the tool 5 sucks in air from the outside through the air introduction passage 92 and blows it downward in the direction of the tool 5.

The air flow ejected downward from the lower end opening (nozzle portion) of the blower guide 91 and in the axial direction of the rotary shaft 31 accelerates the flow velocity at the nozzle portion and moves toward the vicinity of the cutting portion of the tool 5. Then, the chips are separated from the work piece 51, and thereafter, the chips are inverted and lifted while wrapping around in the outer diameter direction of the nozzle portion, and pass through the outer peripheries of the blower guide 91 and the fan rear cover 94 toward the dust flow passage 6. Therefore, the tool 5
The chips (particularly, the chips accumulated in the groove of the work piece 51) generated in the cutting portion of (3) are satisfactorily removed, and are smoothly removed to the dust flow passage 6 side.

Further, according to this embodiment, since it is not necessary to provide an expensive air pump, a large increase in cost can be avoided. In addition, high-speed rotation (18000-30000r)
The cutting edge of the tool 5 which is heated to a high temperature is also cooled by the air blown from the air blow guide 91.

In addition, the air introduction passage 92 is provided with a blower guide 9
Since the inside of 1 and the outside of the dust collecting cover 7 are communicated with each other, the chips contained in the rising air flow rising from the vicinity of the cutting portion of the tool 5 are caught by the fan 9 and returned to the lower side again. Circulation can be prevented. Further, since the air introduction passage 92 is provided so as to be inclined with respect to the radial direction of the fan 9 and the outlet 92a of the air introduction passage 92 is directed to the downstream side in the rotation direction of the fan 9, the suction resistance of the air by the fan 9 is small and the outside air Are easily sucked in, or the driving power of the fan 9 (and hence the tool 5) is reduced.

Further, as shown in FIG. 2, the air blow guide 91 is attached to the air blow guide 91 by the tool fastener 4 in a mounted state.
Although it is hidden, when the lever 74 is operated to release the engagement between the engaging claw 71 and the engaging protrusion 21 and the dust collecting cover 7 is removed, the dust collecting cover 7 and the dust collecting cover 7 are removed together. ing. Therefore, the tool fastener 4 is exposed only by removing the dust collecting cover 7, and the tool 5 can be immediately attached / detached. Therefore, the attaching / detaching workability of the tool 5 is very good.

FIG. 4 is an enlarged view of an essential part of the second embodiment of the present invention, which is equivalent to FIG. The second embodiment is
This is an example of processing the outer periphery of the processed material with a blade having an outer diameter larger than the opening diameter of the blower guide of the first embodiment. The second embodiment employs a fan 9A of a type different from that of the first embodiment, and the air blowing direction is also reversed.
That is, the fan 9A blows air from below. The fan 9A is fixed to the rotary shaft 31 of the tool 5 by the nut 93 as in the first embodiment. That is, the boss portion of the fan 9A is inserted into and fitted to the rotary shaft 31 from below, and the nut 93 is raised from the lower portion while being screwed into the male screw provided on the lower portion of the rotary shaft 31 to rotate the boss portion. It is fastened and fixed between the shaft 31 and the upper step. It should be noted that the blower guide and the air introduction passage adopted in the first embodiment are not provided. The second embodiment is configured similarly to the first embodiment in other points.

Also in the second embodiment, as in the first embodiment, the chips can be satisfactorily removed from the workpiece 51A, and the discharge of the chips to the dust flow passage 6 can be promoted. This has the effect of not significantly increasing the cost of the device, and in the second embodiment, since the fan 9A increases the suction force from the dust flow passage 6 side,
The effect that chips are less likely to be scattered to the outside of the skirt member 8 is also achieved.

The present invention is not limited to the above embodiment. For example, in the first embodiment, four fan blades are shown in FIG. 3, but the number of fan blades is not limited to the above. There is no limit to the shape and the shape, and the air introduction passages are provided in three directions, but the number of air introduction passages is not limited. Further, the angle at which the air introduction passage is inclined with respect to the radial direction may be appropriately set, or may not be inclined.

[0029]

According to the dust collecting apparatus of the machine tool head portion of the present invention, the chips can be satisfactorily removed from the workpiece, and the discharge of the chips to the dust flow passage can be promoted. Does not increase the cost.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing one embodiment of the present invention.

FIG. 2 is a cross-sectional side view showing an enlarged main part of the dust collector shown in FIG.

3 is a partial cross-sectional bottom view of the dust collector shown in FIG.

FIG. 4 is a view, corresponding to FIG. 2, showing a second embodiment of the present invention.

[Explanation of symbols]

 1 Head 2 Casing 21 Engagement Protrusion 3 Motor 31 Rotating Shaft 4 Tool Fastener 5 Tool 51 Workpiece 51A Workpiece 6 Dust Flow Passage 7 Dust Collection Cover 71 Engaging Claw 72 Pin 73 Spring 74 Lever 8 Skirt Member 9 Fan 9A Fan 91 Blower guide 92 Air introduction passage 93 Nut 94 Fan rear cover 95 Bearing block

Claims (6)

[Claims] 1. A tool fastener having a tool fastener provided at the center of a lower surface thereof, a tool being attached to a lower portion of the tool fastener, the tool being engaged with an outer periphery of the head, and the lower portion protruding downward from the head. A dust collecting device for a machine tool head, which is provided with a cylindrical dust collecting cover surrounding the outer peripheral part of the machine, an upper part thereof is connected to a suction duct, and a lower part thereof is provided with a dust flow passage opening to an upper part in the dust collecting cover. The dust collecting device for a machine tool head, wherein a fan for flowing air is provided on a rotary shaft of the tool above the tool. 2. The dust collecting device for a machine tool head according to claim 1, wherein the fan is provided so as to blow air downward in the tool direction. 3. A blower guide is provided on the outer periphery of the fan so that the wind inside the blower guide is guided in the tool direction and the wind outside the blower guide is guided in the dust flow passage direction. A dust collector for a machine tool head according to claim 2. 4. The dust collecting device for a machine tool head according to claim 3, wherein an air introduction passage to the fan is provided so that the inside of the blower guide communicates with the outside of the dust collecting cover. 5. The work according to claim 4, wherein the air introduction passage is provided so as to be inclined with respect to the radial direction of the fan, and the outlet of the air introduction passage is directed to the downstream side in the rotation direction of the fan. Dust collector for machine head. 6. The dust collecting apparatus for a machine tool head according to claim 1, wherein the fan is provided so as to blow air upward from the tool.