JP2000271833A - Dust collector for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly discharge cutting chips from a machining point by surrounding a whole work as widely as possible, introducing an air for dust collection from a position, at least, lower than the machining surface, and enhancing the speed of the air therein. SOLUTION: A main spindle 13 having a tool 11 fixed thereto is lowered to a dust collecting cover 17 inside through a hole 38 provided in the center of the dust collecting cover 17 upper surface and touches and machines a work 27 fixed on a word base 19 via a work pedestal 25. Cutting chips generated then are mounted on an air flow flowing in a space formed between the dust collecting cover 17 and the work 27 from the bottom to the top and taken out to the outside by the air sucking of an air outlet 35 provided for escaping the air from the space to the upper surface of the dust collecting cover 17. The air is a main flow for the dust collection, which enters from a position lower than the cutting surface of the work 27, entrains the cutting chips floating near the cutting point, and guides them to the outlet 35 in the upper part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting apparatus for a machine tool which generates cutting chips and dust, and more particularly to a machine for processing a material which is likely to generate cutting chips by a machine tool. The present invention relates to a device for preventing scatter and adhesion in the air, around a machine, and around a work.

[0002]

2. Description of the Related Art FIG.
FIG. 4 is a structural diagram illustrating an example of a conventional dust collector described in No. 4; In the figure, this dust collecting device is mounted on a tool mounting portion 1 of a vertical end mill, and includes a dust collecting device mounting portion 2, an air suction device connecting portion 3, and a suction portion 4. The mounting section 2 forms a suction chamber 5, the suction section 4 is mounted so as to surround a tool 6, and an annular brush 7 is mounted at a lower end of the suction section 4. The brushes constituting the annular brush 7 are arranged in a tapered shape in which the lower part extends outward, and are in contact with a workpiece (hereinafter, referred to as a workpiece) 9.

[0003] In such a conventional dust collector example,
Prior to the start of the work, the device connection unit 3 is connected to the exhaust device. Next, the vertical end mill is driven, the spindle 8 and the tool 6 are rotated, and machining is performed while the vertical movement of the spindle 8 and the step movement of the work 9 are repeated. At this time, the suction portion 4 of the dust collecting portion has the tip of the annular brush 7 surrounding the tool 6 to contact the upper surface of the work 9 to prevent chips from scattering to the outside and to take in outside air for suction. Mouth. The contact between the dust collector and the work 9 is made by the annular brush 7
Therefore, even if the work has a step or is wavy, it can conform to the shape. Moreover, the brush of the annular brush 7 is formed in a taper shape in which the outside spreads outward in advance, and a strong resistance is given to the brush being wound inward. Also, the brush is less likely to be caught by the rotating tool 6 and damaged.
The swarf is taken into the exhaust device by the airflow and processed.

[0004]

The conventional dust collecting apparatus as shown in FIG. 6 is constructed as described above. According to this structure, an annular brush is used to absorb irregularities on a work. It needs to be longer. However, as described above, the space between the suction section 4 and the work 9 is configured to serve as an outside air intake for suction, and if the space between the suction section 4 and the work 9 is widened, the air suction area increases and the air flow rate around the work decreases. turn into. In particular, when the cutting waste is heavy, there is a possibility that a sufficient dust-absorbing force cannot be obtained.

Further, since the air is introduced mainly from the horizontal direction upward from a position at the same height as the cutting surface or a position higher than the cutting surface, the chips are directed toward the suction chamber 5 above. There is a problem with efficient siphoning. Further, in such a conventional structure, since the air flow containing the cutting chips passes through the main shaft 8, the cutting chips easily enter the bearing portion of the main shaft 8, which adversely affects the accuracy and life of the processing machine. There is a possibility that it will.

SUMMARY OF THE INVENTION The present invention addresses the above-mentioned problems of the prior art, and enables the cutting chips generated from a processing machine to be reliably collected with a smaller air flow rate. The purpose is to obtain a dust collector that does not touch.

[0007]

According to the present invention, in order to solve the above-mentioned problems, the whole work is surrounded as much as possible, and air for dust collection is introduced at least from a position lower than the processing surface, and the flow velocity of the air therein is reduced. It is preferable that a swirling flow is generated, so that an efficient dust collecting measure can be taken such that cutting chips do not fall on the floor even with a small amount of air. Specifically, it includes the following contents.

According to the first aspect of the present invention, in a machine tool involving generation of cutting chips and dust, a work table for fixing a work and an opening through which a tool can enter and exit are provided in synchronization with a machine tool spindle. A space that covers the work is formed by a horizontally movable dust collection cover, air is introduced into the space from a position lower than the work surface of the work, and the space is located at a position higher than the work surface of the work. The cutting dust and the dust are discharged to the outside of the machine by sucking air from an air outlet provided in the dust collecting cover.

According to a second aspect of the present invention, there is provided a dust collecting apparatus, wherein an inlet for introducing air from a position lower than a work surface of the work is provided in the work table. This is for introducing upward air from a position close to the work.

According to a third aspect of the present invention, there is provided a dust collecting apparatus according to the present invention, wherein a pedestal is provided between the work and the work table to lift a work surface of the work to a higher position. This is to create a flow of air from below to above around the work surface of the workpiece.

According to a fourth aspect of the present invention, there is provided a dust collecting apparatus according to the present invention, wherein a concave portion is provided in the work table, and the entire work is arranged in the concave section so that the work surface of the work is lower than the upper surface of the work table. The dust collecting cover is formed so as to cover the concave portion even when the processing location of the workpiece moves in the horizontal direction.

According to a fifth aspect of the present invention, there is provided a dust collecting apparatus, wherein a dust collecting ring for covering a periphery of a side surface of the work on the ring is provided between the bottom surface of the recess and the work within the concave portion of the work table. Are provided with a predetermined gap therebetween. This is for increasing the flow velocity of the air from below to above the periphery of the work, and at the same time, colliding the cutting chips scattered in the horizontal direction to put the cutting chips on the flow of the air.

According to a sixth aspect of the present invention, in the dust collecting apparatus, the dust collecting ring is adjustable or replaceable in accordance with the work in order to maintain a predetermined gap between the dust collecting ring and the work. It is characterized by: The purpose is to increase the flow velocity of air by appropriately providing the gap.

According to a seventh aspect of the present invention, there is provided a dust collecting apparatus, wherein an inner surface of the dust collecting ring facing the work is provided with a slope that extends upward. It is intended to repel cutting debris colliding with the inner surface of the ring upward to facilitate discharge.

In the dust collecting apparatus according to the present invention, preferably, the air introduction port provided in the work table includes a plurality of grooves that open horizontally on a side surface of the recess of the work table. Is characterized by being provided with an undercut portion for equalizing the inflow of air from the groove.

According to a ninth aspect of the present invention, there is provided a dust collecting apparatus according to the present invention, wherein each of the plurality of grooves opening horizontally in the side surface of the recess forms a predetermined angle in a horizontal direction from a direction toward the center of the recess. It is characterized by being arranged spirally. This is because a swirling flow of air is easily generated in the concave portion.

According to a tenth aspect of the present invention, there is provided a dust collecting apparatus according to the present invention, wherein the upper surface of the dust collecting cover is provided on a surface inside the dust collecting cover facing the surface to be processed in a thickness direction from the surface. A boring space that is spirally deepened stepwise until the space is formed, and an air outlet is provided from a position where the space opens to the upper surface in a direction substantially tangential to the spiral space. It is characterized by. By configuring the space in this way, a swirling flow of air is generated.

The dust collecting apparatus according to the present invention is provided with a flexible annular brush for closing a gap between the dust collecting cover and the work table at an outer peripheral portion of the dust collecting cover. It is characterized by: This is because the air flowing around the work flows from the bottom to the top and the other air is prevented from flowing as much as possible.

The dust collecting apparatus according to the present invention is characterized in that a cylindrical guide portion is provided in a hole through which a machining spindle of the dust collecting cover can enter and exit vertically. This is to prevent cutting chips from escaping to the outside from this portion.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A dust collecting apparatus according to the present invention is efficient with a small air flow rate while cutting chips generated in end mill processing by a machining center or processing by a drilling machine are floating in the air. It is intended for dust collection and disposal. Typically,
In the case where the powder once dropped on the floor is re-floated by an air flow, a large flow rate that is 10 times or more the air flow rate for transferring the powder floating in the air is required. A similar large flow velocity is also required when a powder having strong velocity energy in a direction different from the air flow is made to follow the air flow. Based on this finding, the inventor of the present invention introduces air from a position lower than the work, and discharges the air upward through the cutting portion where the cutting chips float, thereby effectively collecting dust of the cutting chips,
It was intended to be disposed of. At the same time, a countermeasure is taken to eliminate cutting components that do not follow the air flow so as to eliminate velocity components other than the flow direction by colliding the chips with the collision plate.

Hereinafter, embodiments of the dust collecting apparatus according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an example of a machine tool equipped with a dust collecting device according to the present invention. In the figure, reference numeral 11 denotes a tool such as an end mill attached to the spindle 13 and 15 denotes a column.
5 is equipped. That is, the horizontal movement of the main shaft 13 is synchronized with the horizontal movement of the column 15. And 17
Is a dust collecting cover, 19 is a work table for fixing the work, 21
Is a frame fastened to the column 15, and the dust collecting cover 17
Is floated about 5 mm from the upper surface of the work table 19 and held. In this state, the center of the dust collecting cover 17 is
3 and both of them are mounted on the column 15, so that even when the main shaft 13 moves in a horizontal plane, the two shafts always maintain the same coaxial relationship.

At the time of machining, first, the work is
9, the spindle 13 and a tool 11 such as an end mill fixed to the spindle 13 are lowered while rotating, and the dust collection cover 1 is rotated.
7 passes through a hole provided in the center of the upper surface and comes into contact with the work inside the dust collecting cover, and performs necessary processing. Chips generated during processing are sucked upward by air introduced into the dust collecting cover 17 from below, and discharged through an air outlet provided in the dust collecting cover 17 described below.

Next, the situation inside the dust collecting cover 17 will be described with reference to FIGS. FIG. 2 shows a first embodiment of a dust collecting apparatus according to the present invention. In the drawing, a main shaft 13 to which a tool 11 is fixed has a dust collecting cover 17.
Through the hole 38 provided at the center of the upper surface, the dust collector is lowered into the dust collecting cover, and contacts the work 27 fixed on the work base 19 via the work base 25 to perform processing. The cutting chips generated at this time are separated from the dust collecting cover 17 and the work 27.
The space formed between the dust collecting cover and the air flow outlet 35 is provided so that the air flows upward from the bottom to the upper surface of the dust collection cover. It is.

In this case, the main air introduction path is
The dust is taken in from the gap between the dust collection cover and the work table shown in FIG. This air is clear from the figure,
Outflow port 35 which enters from a position lower than the cutting surface of work 27 and which contains cutting chips floating near the cutting point and
This is the main stream of dust collection that leads to. Another air entry path is provided by a hole 38 in the center of the dust collecting cover 17.
B of the figure entering through the gap 37 between the
This is the flow indicated by. Since this air enters from above, it flows in a direction opposite to the flow from below to above. Therefore,
Although the air entering from this gap is inevitable to some extent for the introduction of the tool 11, it is desirable to minimize this amount.

Here, as described above, the dust collecting cover 17 is used.
Move in synchronization with the horizontal movement of the spindle 13. Considering the machining surface of the work 27, the tool 11 moves from the left end to the right end of the work 27 for machining in the drawing, and the dust collecting cover 17 and the work 2 move in synchronization with the movement.
In order to avoid interference with the work 7, it is necessary to cover the work 27 with a large dust collecting cover 17 as shown in the drawing. Therefore, the air a introduced at this time is
7, the flow of air working from below to above in the vicinity of the work 27 is inclined obliquely, and the flow velocity tends to be weak. At the same time, since the entire dust collecting cover is large, a gap for introducing air is widened by an increase in its outer periphery, and the flow velocity is further reduced.

As a countermeasure for this, first, the work pedestal 25 is located between the work 27 and the work base 19.
To lift the work 27 a little higher. Thereby, the introduced air can be made to flow from a lower position, and the dust collection efficiency can be increased.

A further measure is to provide an air inlet 29 as shown by a dotted line in the work table 19 immediately below the work 27,
By introducing air from here in the direction of arrow c, the cutting chips can be efficiently sucked upward. In this case, it is desirable to minimize the amount of air a introduced from the gap between the dust collecting cover and the work table.

Next, a dust collector according to a second embodiment of the present invention will be described with reference to FIG. The work table 19 in this embodiment is provided with a plurality of holes for accommodating a plurality of works, and is set on a block 23 having a flat surface. The schematic diagram of FIG. 1 also shows the work table of the present embodiment. In FIG. 3, a work 27 is fixed on a work pedestal 25 in a hole of the work base 19, and at this time, the upper surface side of the work 27 is configured not to protrude above the upper surface of the work base 19. ing. The hole of the work table 19, together with the block 23, forms a recess for accommodating the work 27 and the work base 25. In the present embodiment, a plurality of such holes are provided, and the recess is formed together with the block 23. However, the hole may be singular, and the work table 19 is not provided with a recess in itself. It may be provided.

On the lower surface (back surface) side of the work table 19, grooves 29 serving as air flow paths are provided vertically and horizontally. Through this flow path, the lower end of the work table 19 has a horizontal end portion or an adjacent side. Air can freely flow between the holes. The groove 29 has a plurality of openings in a recess in which the work 27 and the work pedestal 25 are arranged, and air is introduced into the recess. At this time, in order to maintain the uniformity of air introduction inside the concave portion, it is preferable that an undercut portion 30 is provided on the entire side surface of the concave portion.

The air introduced through the groove 29 is introduced into the concave portion from the periphery of the work table 19 in the drawing, passes around the work pedestal 25 and the work 27 from the bottom to the top, and further, the dust collecting cover. And is discharged upward by the suction force from the air outlet 35.
In the process, the cutting chips floating in the space are sucked up and discharged to the outside. FIG. 4 is a cut-out view of a plurality of holes provided in the work table 19, and shows an outline of the work table 19 in which the groove 29 is provided.

Next, a dust collector according to a third embodiment of the present invention will be described. Here, the flow of the air flows from the bottom to the top of the entire periphery of the work 27, and thereafter gathers from the periphery of the work 27 in a space between the dust collecting cover 17 and the work 27 and goes to the outlet. . The flow of air that is going to gather from the periphery of the work 27 to the center will collide with each other and work so as to cancel each flow velocity. Since this is a place where cutting chips are scattered and floating, it is important to avoid such cancellation as much as possible, to keep the flow velocity high, and to efficiently put the cutting chips in the air flow. For that purpose, it is desirable to make this space a flow of air in a certain direction.
From this point of view, in the present embodiment, each groove 29 opening in the concave portion is provided at a certain angle from a direction toward the center of the concave portion, and is arranged in a spiral shape.
Thereby, a swirling flow around the work 27 can be easily generated.

Next, a fourth embodiment according to the present invention will be described with reference to FIG. Reference numeral 31 shown in the figure denotes a dust collecting cup, which is arranged around the entire periphery of the side surface of the work 27 with a predetermined gap from the work 27, and is fixed by screws 32 at several places on the work table 19. The main function of the dust collecting cup 31 is to narrow the flow path of the air introduced from the groove 29 to an appropriate gap formed between the main dust collecting cup 31 and the block 23 serving as the bottom surface of the concave portion. Is to increase the flow velocity of the air. Furthermore, the subsequent airflow,
This means that an appropriate amount of air is squeezed between the dust collecting cup 31 and the work pedestal 25 to guide the air flow upward from the side surface of the work while maintaining the high speed. This more efficiently guides the air upward, prevents the chips from falling, and removes them from the air outlet 35.
Will be able to lead to

The dust collecting cup 31 further has a function of causing cutting chips scattered in the horizontal direction from the work 27 to collide with the dust collecting cup 31 to attenuate the velocity energy. From this viewpoint, it is preferable that the dust collecting cup 31 be provided with a taper that expands upward as shown in the figure. The cutting debris that has collided with the dust collection cup 31 attenuates the velocity energy due to the collision, rebounds, rides on the surrounding airflow, and is guided to the outlet 35. Further, other cutting chips mainly having a small speed energy tend to fall into a gap with the work 27 after colliding with the dust collecting cup 31,
Since there is an upward air flow in the gap, the air moves along the flow so as to be conveyed by the air flow and is discharged.

From the above situation, it is desirable that the gap between the dust collecting cap and the work be appropriately narrow. To cope with this, it is desirable that the dust collection cap 31 can also adjust the gap between the dust collection cap 31 and the work 27 according to the shape of the work 27 to be processed. A preferred embodiment is
Prepare a dust collection cap for each part to be machined in advance,
When the work 27 changes, the dust collection cap 31 is also replaced. In addition, the dust collecting cap 31 may be made of a material having an appropriate flexibility, or may be made of a divided type, and the mounting hole may be made elongated by taking measures such as making the hole into a long hole. By doing so, it is possible to always obtain an airflow having a preferable flow rate not only for a work having a circular cross-sectional shape but also for a work having a square shape.

When the work 27 is machined by an end mill or the like, cutting chips are scattered over the entire region above the horizontal. As described above, a large flow rate of air is required when the powder once dropped on the floor is re-floated by an air flow. Therefore, in order to collect and discharge cutting chips with the smallest possible air flow, make sure that the cutting chips do not fall to the floor.If there is cutting chips that fly in a direction different from the direction of the air flow to collect dust, The velocity energy needs to be attenuated to make it easier to follow the airflow.

The behavior of the chips inside the dust collector shown in FIG. 3 can be summarized as follows. The chips scattered in the horizontal direction collide with the dust collecting cap, reduce the velocity energy, and then move upward. It bounces off and rides in the air stream and is discharged. Similarly, cutting chips with low velocity energy in the horizontal direction, or cutting chips that partially bounce off the dust-collecting cap and then travel downward, are blown upward by the upward airflow between the workpiece and the dust-collecting cap and discharged. You. A part of the cutting chips scattered upward tries to enter the gap 37 between the hole in the center of the dust collecting cover and the main shaft of the processing machine. It collides with the wall of the vehicle and attenuates the velocity energy, is sent down by the air, and is engulfed by the upward flow therein and discharged. A part of the cutting chips scattered in the upward direction collides with the ceiling of the dust collection cover, attenuates the velocity energy, and when it rebounds, is caught in an upward flow and is discharged. Other chips having a relatively low velocity energy float in the space above the work, and are discharged along the upward flow during this time.

As described above, it is desirable to form a flow of air that travels in a certain direction at a flow velocity as high as possible in order to effectively collect cutting chips in the dust collecting cover including the periphery of the work. Forming a swirling flow in the cover is an effective solution. As described above, the arrangement of the groove 29 of the work table 19 has been mentioned, but here, as a fifth embodiment of the present invention, the provision of a mechanism for generating a swirling flow in the dust collection cover will be described. The means is the arrangement of the air outlet shown in FIG.

FIG. 5 is a schematic view of the dust collecting cover 17 as viewed from below, and the central portion of the lower surface corresponds to a position facing the work 27. At that position, a boring space 33 that is spirally deepened stepwise in the thickness direction from the surface facing the work 27 (that is, the lower surface of the dust collection cover, which surface is shown in the drawing). Is formed. Further, at a position where the slope space has escaped to the upper surface (the rear surface in the drawing) of the dust collecting cover 17, an air outlet 35 is formed from the air outlet 35 in a direction tangential to the slope space. The air outlet 35 is connected to an air suction device and a cutting waste collection device (not shown) during operation.

In the operation, a negative pressure is generated at the air outlet 35 by the suction action of the air suction device, and when the air is sucked from the dust collecting cover by the action of the negative pressure, the air in the space is removed. Since the spiral slope is swirled and sucked, a swirling flow is generated along the entire flow in the dust collecting cover.

Further, since the air and the cutting chips are discharged from the tangential direction of the space on the slope as described above, the cutting chips are scattered in the main shaft direction as in the prior art, which adversely affects the machine itself. Can be avoided. In this case, as described above, it is more efficient to arrange the opening of the groove 29 on the lower surface of the work table 19 in a spiral shape along the direction of the swirling flow, so that the swirling flow can be generated more efficiently. Connect.

Next, a sixth embodiment according to the present invention will be described with reference to FIG. 3 again. In order to obtain the efficient air flow in the space inside the dust collecting cover 27, it is desirable to reduce the amount of air other than the air introduced from the lower part of the work table 19 as much as possible. As described in the above embodiment, the dust collecting cover 27 and the work table 19
A gap of about 5 mm is provided between them. The gap is provided so that the dust collecting cover 27 that moves in synchronization with the movement of the main shaft 13 in the horizontal plane due to the change in the processing position does not interfere with the work table 19 due to bending of the frame 21 supporting the dust cover. Things.

Therefore, in the present embodiment, as shown in FIG. 3, an annular brush 39 is provided on the outer periphery of the dust collecting cover 17 so that the gap between the lower surface of the dust collecting cover 17 and the upper surface of the work table 19 is appropriately adjusted. It is to be closed. This annular brush 3
Reference numeral 9 denotes a flexible brush, which can exert a certain sealing effect while sliding on the work table 19.
By adjusting the brush density and length of the annular brush 39, the amount of air entering therefrom is reduced as much as possible, whereby the flow velocity of air introduced from under the work table 19 is increased, and a predetermined air flow with a small air flow rate is obtained. This is to obtain a dust effect.

Next, a seventh embodiment of the dust collector according to the present invention will be described with reference to FIG. A hole 37 through which the main shaft 13 can freely enter and exit is opened at the center of the dust collecting cover 17, and it is necessary to prevent cutting chips scattered from the work 27 from going outside through this hole. As a countermeasure, in the present embodiment, a cylindrical guide portion 38 is provided in the hole as shown in the figure. As a result, the cutting chips scattered in this direction are
Even if it enters the gap between the shaft 13 and the main shaft 13, it is blocked by the flow of air traveling downward from the gap 37 due to the negative pressure in the dust collecting cover 17, and its wall is formed in the cylindrical guide portion 38. Alternatively, it collides with one of the main shafts 13 to attenuate its velocity energy, so that it is pushed back by the air flow and discharged from the air outlet 35 like other cutting chips.

[0044]

According to the dust collecting apparatus of the present invention, for example, chips generated during processing by an end mill or a drill can be quickly discharged from a processing point. The adverse effects can be eliminated.
Further, it is possible to improve the workability related to the processing of the cutting waste. The effects of the invention according to each embodiment are as follows.

According to the present invention, a work is covered with a predetermined space, and a flow of air is formed in the work from below to above, and the work is effectively collected by sucking the work together with the cutting waste from above. can do. At this time, by taking measures such as introducing air from the work table or placing the work on the work base to raise the machining surface, it is possible to make more effective use of the air flow from bottom to top. it can.

According to the present invention, the work table is provided with a concave portion,
By arranging the work therein, a space for covering the work can be easily formed, and the air introduction groove can be effectively arranged.

According to the present invention, by arranging the groove for air introduction on the spiral, a swirling flow is easily generated in the space covering the work, and efficient dust collection with a small amount of air is possible. become.

According to the present invention, by providing the dust collecting cup surrounding the side surface of the work in the space, it is possible to increase the flow rate of air from below to above around the work, thereby enabling effective dust collection. Become. It is more effective to make the dust collecting cup adjustable according to the shape of the work. In addition, the surface of the dust collecting cup facing the work is formed in a tapered shape that spreads upward, so that the scattered cutting chips are rebounded upward, thereby facilitating dust collection.

According to the present invention, a space which is a spiral slope is provided on the surface of the dust collecting cover opposed to the workpiece, and an air outlet is provided in a tangential direction of the slope to suck the air. A swirling flow can be generated in the space covering the work, and efficient dust collection becomes possible.

According to the present invention, by providing an annular brush on the outer periphery of the dust collecting cover, air entering through the gap between the dust collecting cover and the work table can be restricted, and the space from the bottom to the top in the space covering the work can be restricted. A more efficient air flow can be obtained.

According to the present invention, by providing a cylindrical guide in the hole through which the main shaft at the center of the dust collecting cover passes, it is possible to prevent the cutting chips from scattering from this gap to the outside. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a machine tool equipped with a dust collector according to the present invention.

FIG. 2 is a partial cross-sectional view illustrating the dust collector according to the embodiment of the present invention.

FIG. 3 is a partial sectional view showing a dust collector according to another embodiment of the present invention.

FIG. 4 is a perspective view showing a dust collecting apparatus according to the present invention.

FIG. 5 is a perspective view showing an embodiment of a dust collection cover of the dust collection device according to the present invention.

FIG. 6 is a partial sectional view of a conventional dust collector.

[Explanation of symbols]

11 tools, 13 spindle, 17 dust cover, 1
9 work table, 23 blocks, 25 work pedestal,
27 work, 29 air introduction port (groove), 30 undercut part, 31 dust collection cup, 33 boring space, 35 air outlet, 38 guide part, 39
Annular brush.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kaoru Watanuki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Shiro Tatsumi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo 3 Rishi Electric Co., Ltd. F-term (reference) 3C011 BB03

Claims (12)

[Claims] 1. A machine tool that generates cutting chips and dust, has a work table for fixing a work, and an opening through which a machining tool can enter and exit, and can be moved in a horizontal direction in synchronization with a machine tool spindle. With a dust cover,
Forming a space covering the work, introducing air into the space from a position lower than the work surface of the work, and from an air outlet provided in the dust collection cover at a position higher than the work surface of the work. A dust collector for a machine tool, wherein the cutting dust and dust are discharged to the outside of the machine tool by sucking air. 2. The dust collector according to claim 1, wherein an inlet for introducing air from a position lower than a work surface of the work is provided in the work table. 3. The dust collecting apparatus according to claim 1, wherein a pedestal is provided between the work and the work table for raising a work surface of the work to a higher position. apparatus. 4. The work table is provided with a concave portion, and the work is arranged in the concave portion such that a surface to be processed of the work is lower than an upper surface of the work table. The dust collector according to any one of claims 1 to 3, wherein the dust collector is formed so as to cover the concave portion even when the dust collector moves in a horizontal direction. 5. A dust collecting ring for covering a periphery of a side surface of a work on a ring is provided in the recess of the work table with a predetermined gap provided between the dust collection ring and the bottom surface of the recess and the work. The dust collector according to claim 4, characterized in that: 6. The dust collecting ring according to claim 5, wherein the dust collecting ring is adjustable or replaceable according to the work in order to maintain a predetermined gap between the dust collecting ring and the work. Dust collector. 7. The dust collecting apparatus according to claim 5, wherein an inner surface of the dust collecting ring facing the work is provided with a slope that expands upward. 8. An air inlet provided in the work table includes a plurality of grooves that open horizontally in a side surface of a recess of the work table, and air flows from the groove around the recess. The dust collector according to any one of claims 4 to 7, further comprising an undercut portion for equalizing the dust. 9. The method according to claim 1, wherein each of the plurality of grooves that are horizontally opened on the side surface of the recess is spirally arranged at a predetermined angle in a horizontal direction from a direction toward the center of the recess. The dust collector according to claim 8, wherein 10. A boring space inside a surface of the dust collecting cover facing the surface to be machined, which is spirally deepened stepwise from the surface toward the upper surface of the dust collecting cover in a thickness direction. Is formed, and an air outlet is provided from a position where the space opens to the upper surface in a substantially tangential direction of the spiral space. Dust collector as described. 11. A flexible annular brush for closing a gap between the dust collecting cover and the worktable is provided on an outer peripheral side surface of the dust collecting cover. The dust collector according to any one of the above. 12. The dust collecting device according to claim 1, wherein a cylindrical guide portion is provided in a hole through which a processing spindle of the dust collecting cover can vertically enter and exit. apparatus.