WO2017038071A1

WO2017038071A1 - Method for discharging chips from machine tool and chip discharge device

Info

Publication number: WO2017038071A1
Application number: PCT/JP2016/003903
Authority: WO
Inventors: 春生林田; 豊高尾; 黒河　博之; 山崎　徹
Original assignee: ホーコス株式会社; トヨタ自動車北海道株式会社
Priority date: 2015-09-02
Filing date: 2016-08-26
Publication date: 2017-03-09
Also published as: JPWO2017038071A1; TW201713454A; JP6817210B2

Abstract

A machine tool (1) is provided with a processing chamber (S), a mist collector (17), and a chip container (14). Clean air discharged from a discharge opening in the mist collector (17) is supplied into the processing chamber (S) using an discharge air supply duct (19). A guiding air flow for discharging chips is generated inside the processing chamber (S) by air inside the processing chamber (S) being suctioned from a suction opening in the mist collector (17) via a suction duct (18). Clean air discharged from the discharge opening in the mist collector (17) is resupplied to the inside of the processing chamber (S) after chips generated inside the processing chamber (S) are dropped into the chip container (14) and oil mist included in the air inside the processing chamber (S) is removed using the mist collector (17).

Description

Chip discharge method and chip discharge device for machine tool

The present invention relates to a method for discharging chips generated in semi-dry processing or dry processing in a machine tool, and an apparatus used therefor.

Conventionally, in a machine tool that performs cutting processing, by supplying a large amount of liquid coolant to the processing site, heat is dissipated from the workpiece and the tool, and scattering of chips is suppressed by the liquid coolant, and the scattered chips are liquidized. By washing away with coolant, chips were prevented from accumulating on a jig that grips the workpiece, a cover that covers the processing area, or the like.

However, the use of a large amount of liquid coolant tends to be refrained from the viewpoint of environmental considerations, etc., and instead, a mixture of a small amount of lubricant and compressed air is supplied pinpoint to the workpiece processing point. Semi-dry processing and dry processing without using any lubricant are performed. However, in such semi-dry processing and dry processing, if the chips are not washed away by flowing a liquid coolant separately, for example, it will be generated when machining a workpiece such as an aluminum alloy. Chips, including those that were not able to be discharged, had the problem of chip accumulation on jigs and covers.

Therefore, in the chip disposal apparatus described in Patent Document 1, an air nozzle that allows air to flow into the processing chamber is formed in the ceiling portion of the processing chamber that is configured to be substantially sealed, and penetrates the main shaft and the tool in the axial direction. The suction hole is formed so that the powdered chips floating in the processing chamber flow down, and the chips are sucked through the suction holes such as the main shaft. Further, the lubricant separated from the chips is pressurized with a pump, and this time, it is circulated and supplied as a cleaning liquid into the processing region.

Further, in the chip processing apparatus described in Patent Document 2, the compressed exhaust discharged from the apparatus for sucking and separating chips is circulated and supplied to the processing area so that the chips do not accumulate in the processing area. Remove. Further, the mixed liquid of water and lubricant separated from the chips is temporarily stored in a separately provided mixed liquid tank, and the mixed liquid is ejected together with the compressed air to wash away the chips adhering to the workpiece or the like.

JP 2010-579 A JP 2010-105116 A

In the chip processing apparatus described in Patent Document 1, chips are sucked into the suction separation device through suction holes formed in the axial direction of the main shaft or the like, and chips not sucked in the suction holes are processed in the processing chamber. It is designed to discharge to the trough directly below. However, since the suction hole provided in the main shaft or the like has a smaller diameter than that of the trough, there is a risk that chips moistened by the circulatingly supplied cleaning liquid will adhere to the inner wall of the suction hole and clog the suction hole. Moreover, since the inside of the processing region is in a wet state, the blowing effect for blowing off chips by the exhaust of the suction / separation device is reduced.

In the chip processing apparatus described in Patent Document 2, a blower for supplying the exhaust from the apparatus for sucking and separating chips as air for blowing off chips is separately required. In addition, a pump for storing the mixed liquid separated from the chips in a separately provided mixed liquid tank and a discharge pump for ejecting the mixed liquid from the mixed liquid tank must be provided. Is required. For this reason, in order to circulate and discharge the exhaust gas and the mixed liquid, a large number of separate power sources are required, and the power consumption becomes large, so that the energy saving effect is thin. In addition, since the chips are moistened by the injection of the mixed liquid, the chips may be clogged along the route to the suction separation device. Furthermore, the processing chamber becomes wet, and the blowing effect for blowing off chips by the exhaust of the suction separation device is reduced.

Therefore, an object of the present invention is to provide a chip discharge method and a chip discharge apparatus that can efficiently discharge chips and realize energy saving.

A chip discharge method according to the present invention includes a processing chamber that forms a closed space in which a workpiece is processed, a mist collector that removes oil mist in the processing chamber, and a chip container that receives chips generated in the processing chamber. A chip discharging method in a machine tool equipped with, supplying clean air discharged from the discharge port of the mist collector into the processing chamber, and sucking air in the processing chamber from the suction port of the mist collector, A guide air flow for discharging chips is generated in the processing chamber, the chips generated in the processing chamber are dropped into a chip container, oil mist contained in the air in the processing chamber is removed by a mist collector, and then the mist is discharged. Clean air discharged from the collector outlet is again supplied into the processing chamber.

It is preferable that the air in the processing chamber is sucked at a position lower than the processing position of the workpiece.

The guide airflow may be a descending airflow formed by supplying clean air from the ceiling side of the processing chamber to the processing chamber, or formed by supplying clean air from the side of the processing chamber to the processing chamber. It may be a horizontal airflow. In the case of a horizontal airflow, it is preferable to supply clean air into the processing chamber in the vicinity of a jig provided in the processing chamber.

When the machine tool is a machine tool capable of semi-dry processing in which a lubricant is mixed with a carrier gas and supplied to a workpiece processing site, the lubricant is an oil-based lubricant or a water-soluble lubricant that is a lubricant exclusively for semi-dry processing. It is preferable that it is a functional lubricant.

A chip discharging apparatus according to the present invention includes a processing chamber that forms a closed space in which a workpiece is processed, a mist collector that removes oil mist in the processing chamber, and a chip container that receives chips generated in the processing chamber. A chip discharging device in a machine tool equipped with an exhaust supply duct for supplying clean air discharged from a discharge port of a mist collector into a processing chamber and an air intake in the processing chamber connected to a suction port of the mist collector And a suction duct for sucking.

It is preferable that the suction duct sucks air in the processing chamber at a position lower than a processing position of the workpiece.

The exhaust supply duct may supply clean air from the ceiling side of the processing chamber to the processing chamber, or supply clean air from the side of the processing chamber to the processing chamber. In the latter case, it is preferable to supply clean air into the processing chamber in the vicinity of the jig provided in the processing chamber.

The inside of the chip container is preferably sealed with water.

According to the present invention, a guide airflow is generated in the processing chamber by circulating the exhaust of the existing mist collector into the processing chamber, spraying it on the cover or jig, and sucking air containing chips and oil mist in the processing chamber. Therefore, chips generated by processing the workpiece can be efficiently removed, and chip adhesion and accumulation in the processing chamber can be prevented.

In addition, since the exhaust from the existing mist collector is used, it is not necessary to provide a separate compressed air source for blowing away chips, and the amount of compressed air used can be reduced. Also, when the air in the processing chamber is sucked at a position lower than the workpiece processing position, the air flow in the processing chamber is downflowed, and the chips are efficiently discharged into the chip container. There is no need to provide a separate device. Since it is not necessary to rely on coolant cleaning, the work area of the workpiece can be kept dry, and a pump necessary for discharging the cleaning liquid is also unnecessary. As a result, the power consumption of the factory can be suppressed and energy saving can be achieved.

1 is a schematic side view showing a machine tool according to an embodiment of the present invention. It is a schematic front view of the machine tool. It is a schematic side view which shows the machine tool which concerns on other embodiment of this invention. It is a schematic side view which shows the machine tool which concerns on other embodiment of this invention. It is a schematic front view which shows the machine tool which concerns on other embodiment of this invention. It is a schematic perspective view which shows an example of a mist collector.

Next, an embodiment of the present invention will be described with reference to FIGS. In each drawing, the same reference numerals are given to the same or corresponding parts.

The machine tool 1 according to the present embodiment is a vertical machining center, and can perform any of semi-dry processing, dry processing, and normal processing. As shown in FIG. 1, the machine tool 1 includes a main body 2 and a cover 3 surrounding the main body 2. The main body 2 includes a base 4, a first saddle 5 guided in the front-rear direction on the base 4, a second saddle 6 guided in the left-right direction on the front surface of the first saddle 5, and the second saddle. 6 has a spindle head 7 that is guided in the vertical direction on the front surface of the spindle 6, a spindle 8 that is rotatably supported by the spindle head 7, and a tool 9 that is detachably attached to the tip of the spindle 8. Yes. A table 10 is mounted on the front surface of the base 4, and the workpiece W is gripped by the table 10.

Around the table 10, a cover 11 (shown in FIG. 2) is provided so that chips do not enter, and a bellows-like ceiling cover 12 (shown in FIG. 1) covering the processing chamber S is provided. ing. The processing chamber S is a closed space to the extent that chips generated by processing, oil mist, which will be described later, and the like do not scatter or leak outside the machine.

A hopper 13 is provided under the table 10, and chips generated during processing of the workpiece W are dropped through the hopper 13 into an opening 14 a of a chip container 14 installed under the base 4. It has become. In this embodiment, as shown in FIG. 1, a chip conveyor 15, which is a well-known device, is installed in the chip container 14. Chips deposited in the chip container 14 are scraped up by a scraper (not shown) of the chip conveyor 15 and discharged to the chip bucket 16 from the chip discharge port 14b.

When machining the workpiece W in the machining chamber S, the cutting agent or oil supplied from the tip of the tool 9 or a nozzle (not shown) hits the workpiece W, the tool 9 or the like and is scattered as fine particles, or evaporated by the processing heat. It decomposes and turns into smoke. Such a finely divided cutting agent or oil agent or a smoked cutting agent or oil agent is collectively referred to as “oil mist”. The mist collector 17 is a device that removes this oil mist. In coolant processing, a mist collector is used to remove a large amount of oily smoke generated in the processing chamber, but even in semi-dry processing where a small amount of cutting fluid is mixed with compressed air and supplied to the processing point pinpoint, Since a small amount of cutting agent becomes high temperature due to friction and vaporizes and drifts in the air, a mist collector is used. Further, even in dry machining in which no lubricant is supplied to the machining location, oil or the like adhering to the work is evaporated by machining heat and becomes oil smoke and drifts into the machining chamber, so that a mist collector is also required.

The oil mist described above drifts into the processing chamber S and adheres to the cover 11 and the jig 21 or diffuses into the factory when the workpiece W is taken out from the processing chamber S. The diffused oil mist can contaminate the factory and eventually harm the worker's health. Therefore, in a machine tool, a mist collector 17 is always required regardless of whether it is a wet type or a dry type.

As shown in FIG. 6, the mist collector 17 includes a suction port 17a for sucking air containing oil mist drifting in the processing chamber S, a dust collection body 17e for removing oil mist from the sucked air, and an oil And a discharge port 17b for discharging the clean air from which the mist has been removed. Details of the mist collector 17 will be described later.

The suction duct 18 (shown in FIG. 1) connected to the suction port 17a is connected to an opening 14c provided on the upper surface of the chip container 14 in which the chip conveyor 15 is built. The suction duct 18 sucks air in the processing chamber S at a position lower than the processing position of the workpiece W (here, the opening 14c). One end of an exhaust supply duct 19 (shown in FIG. 1) is connected to the discharge port 17b, and the other end of the exhaust supply duct 19 is fixed to the upper side in the processing chamber S and opens to the lower side. ing. The exhaust supply duct 19 supplies clean air discharged from the discharge port 17 b of the mist collector 17 into the processing chamber S from the ceiling side of the processing chamber S.

The clean air from which the oil mist has been removed by the mist collector 17 is supplied into the processing chamber S through the exhaust supply duct 19 from the discharge port 17b. In the present embodiment, as shown in FIG. 2, the exhaust supply duct 19 is bifurcated, and a blowing duct (not shown) thinner than the exhaust supply duct 19 is connected to the opening of the branch duct 19 a. By adjusting the wind direction with this blowing duct, clean air is blown toward the cover 11 and the jig 21 in the processing chamber S from above.

The above is an example, and the exhaust supply duct 19 may not be bifurcated or may be branched into three or more. Moreover, about the duct for spraying, the position and number can be laid out so that clean air can be ejected in arbitrary states according to the shape of the cover 11 and the jig 21 in the processing chamber S.

In the processing chamber S, chips generated by the processing of the workpiece W are scattered, and most of the chips fall into the chip container 14 via the hopper 13 by gravity. However, light chips and fine chips in the form of powder cannot immediately fall to the hopper 13 but remain on the jig 21 or the cover 11 or drift in the processing chamber S, and then the cover 11 or the table 10. And deposited on the jig 21 or the like. However, the purified exhaust discharged from the mist collector 17 is supplied to the processing chamber S through the exhaust supply duct 19 (branch duct 19a) and sprayed from the ceiling side, and the atmosphere in the processing chamber S is By sucking from the suction port 17a through the suction duct 18 at a position lower than the processing location of the workpiece W, a downward air flow, that is, a downward air flow (down flow) is generated in the processing chamber S. This descending airflow is an example of the “guide airflow” in the present invention.

Chips in the processing chamber S are guided by the descending airflow to the chip container 14 from the hopper 13, scraped out by the chip conveyor 15, and discharged from the discharge port 14 b to the chip bucket 16. At this time, a liquid such as coolant is stored in the chip container 14, and by sealing the inside of the chip container 14 with this liquid, oil mist contained in the air flow is discharged from the discharge port 14 b to the atmosphere. Do not spread inside.

Specifically, as shown in FIG. 1, a sealing plate 20 is provided on the downstream side (right side in FIG. 1) from the opening 14 c provided on the upper surface of the chip container 14. The sealing plate 20 is fixed to the ceiling wall 14 d on the upper surface of the chip container 14. The width of the sealing plate 20 (the width in the direction perpendicular to the paper surface in FIG. 1) is substantially the same as the width of the chip container 14 (the same as before), and the height of the sealing plate 20 (up and down in FIG. 1). The height in the direction) is the liquid level W. of the liquid in the chip container 14 from the ceiling wall 14d. It is longer than the distance to L. That is, the lower end of the sealing plate 20 has a liquid level W.P. At a position lower than L, a part of the sealing plate 20 is immersed in the liquid in the container 14. Therefore, since the upstream side and the downstream side are divided by the sealing plate 20 with the sealing plate 20 in between, air containing oil mist can be prevented from diffusing into the atmosphere from the chip discharge port 14b.

Instead of providing the sealing plate 20 as described above, a structure as shown in FIG. 3 may be adopted. In FIG. 3, the base lower portion 14e of the chip container 14 is inclined so as to descend from the front (left side in FIG. 3) toward the rear (right side in FIG. 3). Then, the liquid level W. of the liquid in the chip container 14 is formed on the ceiling portion 14h of the refracting portion 14g that forms the starting end of the gradient portion 14f for lifting the chips, draining them, and discharging them to the chip bucket 16. The chip container 14 is sealed with water so that L contacts.

In each of the above-described embodiments, the suction duct 18 is connected to the upper surface opening 14c of the chip container 14, but an alternative structure may be employed. For example, a duct port may be provided at the hopper 13 at a position lower than the processing position of the workpiece W, or at the joint between the hopper 13 and the chip container 14, and the suction duct 18 may be connected thereto.

Alternatively, the discharge port 14b of the chip container 14 can be fixed in close contact with the sealed chip bucket 16, and a duct port can be provided in the chip bucket 16 to which the suction duct 18 can be connected. When the suction duct 18 is connected to the chip bucket 16, it is not necessary to seal the chip container 14 with water.

In each of the above-described embodiments, the chip conveyor 15 for conveying chips in the front-rear direction of the machine tool 1 is disclosed. However, when a plurality of machine tools 1 are arranged, screws installed along the arrangement direction. It may be a type chip conveyor. In addition, the pits installed on the floor of the factory equipment can be used as chip containers for dropping chips.

Further, in each of the above-described embodiments, the downflow is exemplified as the guide airflow generated in the processing chamber S. However, the guide airflow is not limited to the downflow, and may be a horizontal airflow. An embodiment in this case is shown in FIGS.

In the embodiment shown in FIG. 4, the branch duct 19 a of the exhaust supply duct 19 extends to the vicinity of the jig 21. The distal end portion of the branch duct 19a is bent at a substantially right angle and communicates with the processing chamber S. For this reason, the clean air from which the oil mist has been removed by the mist collector 17 is supplied into the processing chamber S from the side of the processing chamber S through the exhaust supply duct 19 (branch duct 19a). Then, by sucking the atmosphere in the processing chamber S from the suction port 17a (FIG. 6) via the suction duct 18, an air flow from the front side to the rear side, that is, a horizontal air flow is generated in the processing chamber S. . As indicated by the arrows, the horizontal airflow passes through the jig 21 and the table 10, and then descends along a gap 23 formed between the table 10 and the machine body cover 22 and travels toward the hopper 13.

According to the embodiment of FIG. 4, since the clean air that has passed through the exhaust supply duct 19 is supplied into the processing chamber S near the jig 21, this clean air (horizontal airflow) is supplied to the jig 21, the table 10, and the like. By spraying, chips attached to them can be effectively removed. Further, the chips in the processing chamber S can be easily guided from the hopper 13 to the chip container 14 by the air flow descending the gap 23.

In the embodiment shown in FIG. 5, an exhaust supply duct 19 is provided on the right side of the processing chamber S, and an intake duct 24 is provided on the left side of the processing chamber S. The respective leading ends of the exhaust supply duct 19 and the intake duct 24 communicate with the machining chamber S in the vicinity of the jig 21. The intake duct 24 is connected to, for example, the chip container 14 and communicates with the internal space thereof. Alternatively, the intake duct 24 may be connected to the suction duct 18 (FIG. 1) via a filter device (not shown). The clean air from which the oil mist has been removed by the mist collector 17 is supplied into the processing chamber S from the side of the processing chamber S through the exhaust supply duct 19. Further, the atmosphere in the processing chamber S is sucked from the suction port 17a (FIG. 6) through the intake duct 24 and the suction duct 18, so that the processing chamber S moves from the right side to the left side as indicated by an arrow. An air flow, that is, a horizontal air flow is generated. In the case of this embodiment, the atmosphere in the machining chamber S is sucked at the same position (or near position) as the machining location of the workpiece W.

According to the embodiment of FIG. 5, since the clean air that has passed through the exhaust supply duct 19 is supplied into the processing chamber S near the jig 21, this clean air (horizontal airflow) is supplied to the jig 21, the table 10, and the like. By spraying, chips attached to them can be effectively removed. Further, since the intake duct 24 sucks the atmosphere in the processing chamber S in the vicinity of the jig 21, a stronger horizontal airflow is generated in the processing chamber S than in the case of FIG. 4, thereby the jig 21 and the table 10. It is possible to more effectively remove chips adhering to the surface.

In each of the above embodiments, the guide airflow generated in the processing chamber S is a descending airflow or a horizontal airflow. However, the guide airflow of the present invention may be an oblique airflow.

Next, the mist collector 17 will be described in detail with reference to FIG. The mist collector 17 is a multi-cyclone type collector in which a plurality of cyclones 17c are arranged in parallel. Airflow including oil mist generated during machining in the machine tool 1 is sucked from the suction port 17a and introduced into a plurality of cyclones 17c having a known shape. Then, the centrifugal force of the descending swirling flow generated inside each cyclone 17c separates the oil mist in the airflow and reverses the swirling flow upward to discharge it as a clean airflow from the discharge port 17b.

In the cyclone 17c of the present embodiment, since the swirl radius of the swirl flow is reduced and the centrifugal force is increased, the particle diameter that can be separated is reduced, and high-precision separation can be performed. Further, by arranging a plurality of cyclones 17c with high separation accuracy and providing two intakes 17d for one cyclone 17c, a large amount of processing air can be secured. Furthermore, the problem of re-scattering of contaminating particles generated between adjacent cyclones is also solved by the water seal structure disclosed in the international publication WO2014 / 062011 proposed by the present applicant. Sufficient processing air volume can be secured while maintaining the collection efficiency.

Furthermore, since the mist collector 17 is a filterless type that does not use a filter such as a non-woven fabric, the filter is not clogged, and there is no problem that the processing air volume decreases with time. Further, since the filterless type mist collector 17 has a small pressure loss, for example, even if the capacity of the motor for rotating the fan is smaller than the capacity of the filter type mist collector motor having a large pressure loss, the same processing air volume is obtained. It has an energy saving effect such as securing it.

However, the means for collecting oil mist is not limited to the centrifugal separation method using a cyclone as in this embodiment. If it is possible to remove the oil mist from the air containing the oil mist in the processing chamber S and secure an air volume sufficient to circulate and supply clean air to the processing chamber S again, filtration using electric dust collection or a filter is possible. Other methods such as a method may be used.

Next, a brief description of semi-dry processing will be given. When semi-dry machining is performed in the machine tool 1 of the present embodiment, lubricant and compressed air are separately supplied into the main shaft 8, the lubricant and compressed air are mixed at the tip of the main shaft 8, and the mixture is used as the tool 9. It is made to eject from the front-end | tip, and the process location of the workpiece | work W is lubricated pinpoint.

The carrier gas mixed with the lubricant is not limited to compressed air, and may be an inert gas such as nitrogen gas or carbon dioxide gas. Further, instead of mixing the lubricant and the carrier gas at the tip of the main shaft 8, a mixture of both in a separate apparatus may be supplied to the main shaft 8, or the work W may be supplied from a nozzle other than the main shaft 8. You may supply the mixture of both to a process location.

Furthermore, the mixture may be a mixture of not only a lubricant and a carrier gas but also water having a cooling effect.

Next, the lubricant used for semi-dry processing will be described in detail. In the method of discharging chips by circulating the exhaust gas from the mist collector 17, chips coated with a lubricant may become sticky depending on the nature of the lubricant, although the amount is small. However, in order to efficiently discharge chips, it is desirable that the chips be as dry as possible. This is because if the chips are in a dry state, there is no need to use a new compressed air source in order to blow away the chips as in the prior art, and it is not necessary to supply a cleaning agent for washing away the chips. This is because it is only necessary to use a circulating air flow in which the exhaust gas from the existing mist collector 17 is supplied into the processing chamber S and the air in the processing chamber S is sucked.

Unlike conventional methods of discharging chips by flowing a large amount of coolant, semi-dry processing uses only a minimum amount of lubricant, so the chips may not contain much moisture and may be relatively dry. Many. However, the oil mist adheres to the wall surface in the processing chamber S little by little, and remains to form a thin oil film. Such a thin oil film easily deteriorates due to the influence of oxygen, and often changes to a sticky substance, so that the work environment is deteriorated, for example, the cover 11 and the jig 21 are sticky and chips are likely to accumulate. Therefore, in the case of semi-dry processing, it is desirable to use a lubricant exclusively for semi-dry processing having high oxidation stability in order to avoid such problems. Examples of such a lubricant include oil-based lubricants such as synthetic ester oils developed for semi-dry processing and water-soluble lubricants.

¡Suitable lubricants for such semi-dry processing use oils and additives with high processing performance, high biodegradability, and low impact on the environment and human body. In particular, since a water-soluble lubricant can be diluted and used, it is advantageous in terms of the cost of the lubricant itself. Furthermore, since the water-soluble lubricant is less sticky over time, not only the cover 11 and the jig 21 in the processing chamber S but also the chip attached with the lubricant can be dry-processed. A smooth state can be maintained as there is no difference. For this reason, even if the air flow is made by circulating the exhaust gas from the mist collector 17, the chips are easily guided to the lower hopper 13 and guided to the opening 14a of the chip container 14, so that the chips are surely discharged. it can.

As described above, it is possible to discharge chips from the existing chip container 14 by circulating the exhaust of the existing mist collector 17 and forming a guide airflow for discharging chips in the processing chamber S. Further, since the air from which the oil mist has been removed by the mist collector 17 is circulated, it is possible to reliably prevent the air containing the oil mist from leaking into the atmosphere.

1 Machine Tool 3 Cover 4 Base 10 Table 11 Cover 12 Ceiling Cover 13 Hopper 14 Chip Container 15 Chip Conveyor 16 Chip Bucket 17 Mist Collector 17a Suction Port 17b Discharge Port 18 Suction Duct 19 Exhaust Supply Duct 20 Sealing Plate 21 Jig S Room W Work

Claims

Chips in a machine tool including a processing chamber forming a closed space in which a workpiece is processed, a mist collector for removing oil mist in the processing chamber, and a chip container for receiving chips generated in the processing chamber A discharge method,
The clean air discharged from the discharge port of the mist collector is supplied into the processing chamber, and chips are discharged into the processing chamber by sucking the air in the processing chamber from the suction port of the mist collector. To generate a guide airflow for
Chips generated in the processing chamber are dropped into the chip container, oil mist contained in the air in the processing chamber is removed by the mist collector, and then the clean air discharged from the discharge port of the mist collector is A chip discharging method for a machine tool, characterized in that it is supplied again into the machining chamber.
2. The chip discharging method for a machine tool according to claim 1, wherein air in the machining chamber is sucked at a position lower than a machining position of the workpiece.
The chip discharge of the machine tool according to claim 1, wherein the guide airflow is a downdraft formed by supplying the clean air from the ceiling side of the processing chamber to the processing chamber. Method.
The chip discharge of a machine tool according to claim 1 or 2, wherein the guide airflow is a horizontal airflow formed by supplying the clean air from a side of the processing chamber into the processing chamber. Method.
The chip discharging method for a machine tool according to claim 4, wherein the clean air is supplied into a machining chamber in the vicinity of a jig provided in the machining chamber.
The machine tool is a machine tool capable of semi-dry processing in which a lubricant is mixed with a carrier gas and supplied to a processing position of the workpiece,
6. The chip discharging method for a machine tool according to claim 1, wherein the lubricant is an oil-based lubricant or a water-soluble lubricant that is a lubricant exclusively for semi-dry processing.
Chips in a machine tool including a processing chamber forming a closed space in which a workpiece is processed, a mist collector for removing oil mist in the processing chamber, and a chip container for receiving chips generated in the processing chamber A discharge device,
An exhaust supply duct for supplying clean air discharged from the discharge port of the mist collector into the processing chamber;
A suction duct connected to the suction port of the mist collector and sucking air in the processing chamber;
A chip discharging device for machine tools, comprising:
The chip discharge device for a machine tool according to claim 7, wherein the suction duct sucks air in the processing chamber at a position lower than a processing position of the workpiece.
The chip exhaust device for a machine tool according to claim 7 or 8, wherein the exhaust supply duct supplies the clean air into the processing chamber from the ceiling side of the processing chamber.
9. The chip discharge device for a machine tool according to claim 7, wherein the exhaust supply duct supplies the clean air from a side of the processing chamber to the processing chamber.
The chip discharge device for a machine tool according to claim 10, wherein the exhaust supply duct supplies the clean air into the processing chamber in the vicinity of a jig provided in the processing chamber.
The machine tool is a machine tool capable of semi-dry processing in which a lubricant is mixed with a carrier gas and supplied to a processing position of the workpiece,
12. The chip discharging apparatus for a machine tool according to claim 7, wherein the lubricant is an oil-based lubricant or a water-soluble lubricant that is a lubricant exclusively for semi-dry processing.
13. The chip discharging apparatus for a machine tool according to claim 7, wherein the inside of the chip container is sealed with water.