JPH11267942A - Chip flying prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure wherein a cutting main part is advanced from the external part of a surrounding space to the internal part thereof and to regulate flying of chips without needing a liquid curtain. SOLUTION: This surrounding device forms a surrounding space (c) formed by surrounding the periphery of a work (w) with chip shielding sections (a), (b) and 1 and an opening (d) through which cutting main parts 10 and 11 are advanced from the external part of the surrounding space (c) to the internal part thereof during cutting of the work is formed. The opening (d) is shielded with a curtain-form air flow (m) and flying of the chips, flying from the work (w) toward the opening (d), to the outside of a surrounding space (c) is cut off by this air flow.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing swarf scattering used in cutting by a machine tool.

[0002]

2. Description of the Related Art During a cutting operation by a machine tool, a surrounding space is formed around a work by a cutting-dust blocking surface to prevent scattering of the cutting chips to the surroundings. There is an apparatus for preventing chips from being scattered which has an opening for entering the enclosure from the outside to the inside.

[0003] In this type of apparatus, it is necessary to take measures to prevent the cutting chips from scattering outside from the opening. For this reason, there is an apparatus in which the opening is covered with a liquid curtain. Registration No. 3041140).

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to replace the above-mentioned conventional chip scatter prevention device, and to provide a new chip scatter prevention device which does not require a liquid curtain.

[0005]

In order to achieve the above object, according to the present invention, an enclosing space is formed in which the periphery of a work is surrounded by a cutting debris blocking surface, and at the time of cutting the work, a main portion of the cutting is located outside the enclosing space. Create an enclosing device with an opening to enter inward from the. Then, the opening is shielded by a curtain-like air flow, and the cutting chips toward the opening are prevented from being scattered outside the surrounding space by the air flow.

[0006] The above invention is embodied as described in claims 2 to 4. That is, as described in claim 2, a downward elongated air injection port is provided near the upper side of the opening along the vertical surface, and an upward elongated air suction port is provided near the lower side. The air jetted from the air is sucked into the air suction port to form a curtain-shaped air flow.

[0007] According to a third aspect of the present invention, a downwardly elongated air injection port is provided near the upper side of the opening, and an upwardly elongated air suction port is provided on the lower side of the opening and surrounds the air injection port. Providing a downward air guide cylinder as described above, when the air injected from the air injection port becomes drive air and passes through the air guide cylinder, the atmosphere is sucked from the upper opening of the air guide cylinder, and merges with the drive air. Air is injected from the lower opening of the air guide cylinder, and the air injected from the lower opening is sucked into the air suction port to form a curtain-shaped air flow.

According to a fourth aspect of the present invention, a pair of air injection ports are provided on the left and right sides of the opening so as to face each other and are slightly inwardly directed, and upward air suction is provided at the bottom in the enclosed space. A port is provided, and the air injected from the left and right air injection ports is sucked into the air suction port to form a curtain-shaped air flow.

According to a fifth aspect of the present invention, a downward air injection port is provided near the upper side of the opening, and a downward air guide cylinder is provided so as to surround the periphery of the air injection port. The part also has a pair of horizontal air injection ports, while on the other hand an upward air suction port is provided on the lower side of the opening, when the air injected from the downward air injection port becomes driving air and passes through the air guide cylinder, Atmosphere was sucked from the upper opening of the air guide cylinder, merged with the driving air and jetted from the lower opening of the air guide cylinder, and the air jetted from the lower opening and jetted from a pair of lateral air jets. A configuration is adopted in which air is drawn into the air suction port to form a curtain-shaped air flow.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the present invention will be described. FIG. 1 is a side view showing a machine tool provided with a device for preventing the scattering of chips, and FIG. FIG. 3 is a front view of the apparatus, and FIG. 3 is a view showing an x1-x1 part of FIG.

In FIG. 1, reference numeral 1 denotes a work fixing table, 2 denotes a cutting device for cutting a work w fixed to the work fixing table 1, and 3 denotes a receiving gutter device.

The cutting device 2 will be described.
Is provided with a guide track 5 having a front-rear direction f on the upper surface thereof, and a spindle device 7 is fixedly mounted on an upper surface of a saddle 6 guided by the guide path 5 and fed and displaced in the front-rear direction f by a motor (not shown). .

Here, the spindle device 7 is configured as follows. That is, a motor 9 is provided on a support frame 8 fixed to the saddle 6, and the main spindle 1 rotated by the motor 9 is provided.
0 is projected from the front end surface of the support frame 8, and the cutting tool 11 is fixed to the tip of the main shaft 10.

On the front surface of the work fixing table 1, a main body 12 of the device for preventing the scattering of cuttings according to the present invention is formed.
The details of the main body 12 will be described below.

That is, the side surface a and a part b of the front surface are formed of a steel plate forming a cutting-dust blocking surface, and the rear surface is covered with a front surface of the work fixing table 1 which is used as a cutting-dust blocking surface to surround the work w. Box body 1 having a substantially rectangular surrounding space c
3 are formed.

The cutting tool 11 and the main shaft 1
An opening d is formed for a main part such as 0 to enter the surrounding space c. The bottom of the surrounding space c has a funnel shape in side view.

An air injection pipe 14 is fixed laterally inside the box 13 at the upper side of the opening d, and the air injection pipe 14 is positioned lower than the upper side in the longitudinal direction at the lowermost peripheral surface. It has a long downward-facing elongated air jet 15.

On the lower side of the opening d, on the inner side of the box 13, there is formed an upwardly elongated air suction port 16 arranged to face the air injection port 15. A straightening plate s bent in a mountain shape as shown in FIG. 1 is fixed laterally over the entire length of the air suction port 16 directly above the air suction port 16. Note that this rectifying plate is effective for short cutting chips, but it may not be a cause of catching when the cutting chips are long.

An air suction tube 17 is formed below the air suction port 16 so as to surround the entire length thereof.

The air supply / suction means is provided in connection with the main body 12 having such a structure, and is specifically configured as shown in FIG. That is, the main body 1
A blower 18 is provided in the vicinity of the air outlet 2, and an air outlet e of the blower 18 is connected to a connection portion of the air injection pipe 14 by a blower pipe 19. Is connected.

A damper 21 for adjusting the cross section of the passage to an arbitrary size and a damper 22 for adjusting the amount of air released to the atmosphere are provided in the middle of the blower pipe 19.

A dust collector 23 is provided in the suction pipe 20. As the dust collecting device 23, for example, a device such as a cyclone or a bag filter is suitable.

A description will be given of an example of use of the apparatus according to the present embodiment configured as described above and its operation. The work w is fixed to the work fixing base 1 through the opening d and the like, and the blower 18 is operated.

When the blower 18 is operated, the air in the box 13 is moved from the air suction port 16 to the air suction cylinder 17 and the suction pipe 2.
The air is sucked into the blower 18 through the dust collection device 23 and the pressure is increased.

The pressurized air is ejected from the air outlet e through the air blower pipe 19 and the air jet pipe 14 into the surrounding space c from the air jet port 15. On the other hand, the air suction port 16 sucks the ejected air and the atmosphere in the box 13.

In this state, the two dampers 21 and 22
Is appropriate, the air flow m formed by being injected from the air injection port 15 eventually becomes a steady flow at a certain speed or more, and has a curtain shape in which the opening d is shut off.

Thereafter, the spindle 9 is rotated by rotating the motor 9 and the saddle 6 is moved by rotating the motor (not shown), so that the spindle device 7 in the state of FIG. Displace.

Thus, the main parts of the cutting (the spindle 10 and the blade 1
1) enters the box 13 through the opening d and cuts the work w. During this cutting, the cutting chips generated from the work w are repelled in all directions by the rotation of the cutting tool 11.

[0029] Of the cutting chips repelled in this way, those which are directed to the solid cutting chip cut-off surface made of a steel plate or the like forming the periphery of the box 13 are separated by the cut-off surface.
It is blocked from flying outside and falls due to gravity.
Further, among the cuttings, those that have flowed toward the opening d are prevented from scattering outside the box body 13 by the curtain-shaped airflow m, and are instantaneously carried downward by the flow energy.

Thus, the swarf is effectively restricted from scattering outside the box 13 and reaches the bottom inside the box 13, and is subsequently sucked together with the air of the air flow m from the air suction port 16 to collect dust. It reaches the device 23, where it is separated from the air and taken out.

After the cutting of the work w is completed, the spindle device 7 is retracted to the original position, the operation of each part is stopped if necessary, and the processed work w is removed from the work fixing base 1 through the opening d. Replace with the workpiece to be processed next.

FIGS. 4 and 5 relate to a modification of the above embodiment. FIG. 4 is a side view showing a machine tool provided with a device for preventing chips from scattering, according to this modification, and FIG. x2
It is a figure which shows a part.

In these figures, substantially the same parts as those in the previous embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described below.

A downwardly directed air guide tube 24 is provided so as to surround the periphery of the air injection port 15.
Is as follows.

That is, as shown in FIG. 4, the cross-sectional shape in the front-rear direction f is funnel-shaped, and the lower end edge of the air injection port 15 is inserted by an appropriate size from the upper opening. An air passage is formed in the vehicle.

The air guide tube 24 is preferably supported on the air injection tube 14 so that the downward angle can be changed and adjusted slightly in the front-rear direction. Other configurations are the same as the previous embodiment.

In this embodiment, when air is injected from the air injection port 15, the air injected from the air injection port 15 becomes driving air due to the presence of the air guide cylinder 24, and the air guide cylinder 24 The atmosphere inside the box is drawn from the upper opening.
This atmosphere is injected from the lower opening of the air guide cylinder 24 together with the driving air.

The air jetted from the lower opening of the air guide cylinder 24 is sucked through the air suction port 16.

Thus, the air flow m formed by the air injected from the lower opening of the air guide cylinder 24 eventually becomes a steady flow at a speed equal to or higher than a certain speed, and becomes a curtain shape in which the opening 15 is cut off. Scattering of the debris to the outside of the box 13 is effectively regulated by the air flow m.

In this modification, the air drawn from the upper opening of the air guide cylinder 24 also contributes to the formation of the air flow m, so that less air is injected from the air injection port 15 than in the previous embodiment. Has the same effect.

Next, a second embodiment of the present invention will be described. FIG. 6 is a side view showing a machine tool provided with a chip scatter preventing device according to this embodiment, and FIG. 7 is a front view of the chip scatter preventive device. 8 and FIG. 8 are views showing the x3-x3 part of FIG. 6, and FIG. 9 is a view showing the x4-x4 part of FIG.

In these figures, substantially the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described below.

At the left and right portions in the box 13, vertical air injection tubes 14, 14 are opposed to each other near the opening d. The horizontal air injection ports 15 and 15 are formed over the entire range of the height of the opening d.

At this time, each air injection port 15 is directed slightly toward the inside (rear side) of the box 13 in plan view. The blower tube 19 is connected to the connection portion of each of the air injection tubes 14 and 14 cylinders, and the other configuration is the same as that of the first embodiment.

In this embodiment, the left and right air injection ports 1
When the air is ejected from the nozzles 5 and 15 with the same force, the air flows sideways as shown in FIGS. 8 and 9 and collides near the center of the width of the opening d. At this time, each air injection port 15,
Because 15 is not right beside and slightly facing the back of the box,
The colliding airflow m tends to go to the inner side of the box 13.

On the other hand, the air injected into the box 13 and the air entering the box 13 are sucked through the air suction port 16. Due to this suction action, the air colliding near the center of the width of the opening d further promotes the tendency toward the inner side of the box 13.

The two air injection ports 15 opposed in this way,
The air flow m formed by the air injected from 15 is
When the opening degree of the two dampers 21 and 22 is appropriate, a steady flow at a certain speed or more is obtained, and the opening d is closed.

Therefore, when the cutting chips move from the work w to the opening d during the cutting, the cutting chips are entrained in the air flow m and carried to the bottom inside the box 13, and scatter outside the box 13. It will be regulated effectively.

In this embodiment, it is preferable that the amount of air supplied to each of the two air injection pipes 14 can be adjusted independently.

In the embodiment of the present invention, it is also possible to combine any one of the above-described first embodiment or the modification with the second embodiment. In this description, substantially the same parts as those described above are denoted by the same reference numerals.

That is, the downward air injection port 15 is provided near the upper side of the opening d. If necessary, a downward air guide tube 24 is provided so as to surround the air injection port 15. Further, a pair of lateral air jets 15 are also provided on the left and right sides of the opening d. On the other hand, an upward air suction port 16 is provided on the lower side of the opening d.

At this time, the former airflow is separated from the latter airflow so that the airflow injected from the downward air injection port 15 does not collide with the airflow injected from the horizontal air injection ports 15 and 15. On the side.

[0053]

According to the present invention having the above-described structure, the structure is such that the main part of the cutting enters from the outside to the inside of the surrounding space, and the scattering of the cutting chips does not require a liquid curtain. Can be regulated.

According to the second aspect, the structure is simple, and according to the third aspect, the amount of air to be injected from the air injection port is reduced, so that it is economical. To shut off the opening with the airflow from the mouth,
Even if the opening is large, the scattering of the cutting chips can be effectively controlled. According to the fifth aspect, the scattering of the cutting chips can be more effectively controlled.

[Brief description of the drawings]

FIG. 1 is a side view showing a machine tool provided with a chip scatter prevention device according to a first embodiment of the present invention.

FIG. 2 is a front view of the cutting chip scattering prevention device.

FIG. 3 is a diagram showing an x1-x1 part of FIG. 1;

FIG. 4 is a side view showing a machine tool provided with a chip scatter prevention device which is a modification of the first embodiment.

FIG. 5 is a diagram showing an x2-x2 part of FIG. 4;

FIG. 6 is a side view showing a machine tool provided with a cutting chip scattering prevention device according to a second embodiment of the present invention.

FIG. 7 is a front view of a cutting chip scattering prevention device according to a second embodiment.

FIG. 8 is a diagram showing an x3-x3 part of FIG. 6;

FIG. 9 is a diagram showing an x4-x4 part of FIG. 7;

[Explanation of symbols]

 a, b Cutting debris blocking surface c Surrounding space d Opening m Air flow w Work 10, 11, Cutting main part 15 Air injection port 16 Air suction port 24 Air guide cylinder

Claims (5)

[Claims] 1. An enclosure in which a surrounding area of a work is surrounded by a cut-off block surface, and an essential part for cutting is provided with an opening for entering from outside to inside of the surrounding space when cutting the work. An apparatus, wherein the opening is shielded by a curtain-shaped air flow, and cutting chips directed from the work toward the opening are prevented from scattering outside the enclosed space by the air flow. . 2. A downward air injection port is provided in the vicinity of an upper side of the opening along the vertical surface, and an upward air suction port is provided in the vicinity of the lower side, and air injected from the air injection port is sucked into the air suction port. 2. The device according to claim 1, wherein a curtain-shaped air flow is formed. 3. A downward air injection port is provided near an upper side of the opening, and an upward air suction port is provided on a lower side of the opening.
Providing a downward air guide cylinder so as to surround the periphery of the air injection port, when the air injected from the air injection port becomes drive air and passes through the air guide cylinder, the atmosphere is sucked from the upper opening of the air guide cylinder, The air is injected from the lower opening of the air guide cylinder by being merged with the driving air, and the air injected from the lower opening is sucked into the air suction port, whereby a curtain-shaped air flow is formed. 2. The device for preventing chips from scattering as claimed in claim 1. 4. A pair of horizontal air injection ports are provided on the left and right side portions of the opening so as to face each other, and an upward air suction port is provided at the bottom in the enclosed space, and the air is injected from the left and right horizontal air injection ports. The cutting chip scattering prevention apparatus according to claim 1, wherein a curtain-shaped air flow is formed by sucking air into the air suction port. 5. A downward air injection port is provided in the vicinity of the upper side of the opening, and a downward air guide cylinder is provided so as to surround the air injection port. An air suction port is provided on the lower side of the opening, and when the air injected from the downward air injection port becomes driving air and passes through the air guide cylinder, the air flows from the upper opening of the air guide cylinder to the air. Is sucked, merges with the driving air, is jetted from the lower opening of the air guide cylinder, and the air jetted from the lower opening and the air jetted from the pair of lateral air jets are sucked into the air suction port. The cutting dust scattering prevention device according to claim 1, wherein a curtain-shaped airflow is formed.