JP2010167548A - Chip conveyor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To separate chips adhered with cutting fluid which are discharged from machine tools such as a lathe and milling machine, into the cutting fluid and the chips, and also discharge the chips while enhancing the collection degree of the cutting fluid. <P>SOLUTION: The chip conveyor device includes a cyclone separator 2, a conveying means 4 disposed at the lower side of the cyclone separator 2 and rotatively receiving and conveying the chips x adhered with a cutting fluid residue discharged from the cyclone separator 2, and a conveying passage 5 with a predefined shape having the conveying means 4. The chips x adhered with the cutting fluid residue are conveyed by the conveying means 4 through the conveying passage 5 having the predefined shape. That causes the chips x to become compressed chips x1 which are discharged from a chip-discharge port 5z. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a chip conveyor device that discharges chips adhering to a cutting fluid discharged from a machine tool such as a lathe or a milling machine, and more particularly to a chip conveyor device to which a cyclonic separator is integrally attached.

  In metalworking machine tools such as lathes and milling machines, cutting fluid (coolant) is supplied to the machining area where the cutting tool such as a tool and cutter comes into contact with the workpiece (workpiece) to suppress heat generation at the machining area. However, the wet type that performs processing has become the mainstream. A chip conveyor device is permanently installed in the wet type machine tool. The chip conveyor device separates and transports chips (powder, whiskers, curls, small lumps, etc.) with cutting fluid discharged from machine tools into cutting fluid and chips. In addition to discharging waste chips that are not necessary, the cutting fluid is removed from the chips by the filtering means in the equipment and supplied to the machine tool. It is used by circulating between them.

  Examples of the filtering means in the chip conveyor device that separates the chips attached with the cutting fluid into the cutting fluid and the chips include a rotary drum filter, a cyclone separator, and a magnet filter. The rotary drum type filter discharges a clean cutting fluid to the outside of the rotary drum by a rotational force (centrifugal force) while retaining unwanted chips inside the rotary drum with a mesh (mesh). The cyclonic separator discharges a clean cutting fluid to the outside of the cyclonic separator by centrifugal force while retaining unwanted chips inside the casing. The magnet type filter discharges a clean cutting fluid out of the magnet type filter while retaining unnecessary iron chips on a magnetic body provided in the housing. That is, any of these filtering means discharges a clean cutting fluid out of the filter in a state where wastes that are unnecessary are kept in the filter.

  Further, as a filtering and conveying means that combines the conveying means with the filtering means for conveying the chips while separating the chips with the cutting fluid into the cutting liquid and the chips in the chip conveyor apparatus, a chain conveyor, a screw type A conveyor, a coil type conveyor, etc. are mentioned. The chain conveyor has a conveyor belt and a plurality of plate plates that convey cutting chips with the cutting fluid on them, and is placed between the drive shaft and the driven shaft. A scraper type conveyor with a scraping member attached to the conveyor belt and a scraping-up member attached to the conveyor belt, and a magnet. There is also a magnetic conveyor attached. The screw type conveyor moves the cutting fluid below the conveyor while compressing it while conveying the chips with the cutting fluid on the rotating shaft formed in the shape of a spiral propeller and discharging it from the discharge port above the conveyor. . Coiled conveyors move cutting fluid below the conveyor while compressing and discharging the chips attached to the cutting fluid from the discharge port above the conveyor by a rotating shaft formed in a spiral coil shape. is there. That is, these filtering and conveying means move cutting fluid below the conveyor while discharging unwanted chips from the discharge port above the conveyor.

  As a conventional chip conveyor device, for example, there is a device configuration that uses the chain conveyor shown in Patent Document 1 and the screw type conveyor (or coil type conveyor) shown in Patent Document 2 alone, but in the single use of these conveyors, Powdered chips may be mixed into the cutting fluid. Therefore, for example, as shown in Patent Document 3, a rotary drum type filter is attached to a chain conveyor, or a cyclone type separator or a magnet type filter is attached for use, thereby increasing the cleanliness of reclaimed cutting fluid. Ingenuity has been made. Moreover, as shown in Patent Document 4, the powdered chips mixed with the cutting fluid is separated into sludge and clean cutting fluid by a cyclone separator, and the clean cutting fluid is recycled and used. There is known a liquid processing apparatus that discharges sludge out of the apparatus by a discharge conveyor.

JP 2001-253523 A Japanese Patent Laid-Open No. 2004-224666 JP 2003-145390 A JP 2006-75725 A

  However, since the conventional chip conveyor devices described in Patent Documents 1 to 4 are focused on cleaning the cutting fluid, the cutting fluid is still attached to the surface of the discharged chips. At present, the chips are discharged in the state, and the cutting fluid adhering to the surface of the chips is discharged along with the discharge of the chips. In particular, the more the chips such as metal chips are made finer (such as aluminum powder of 1 mm or less), it is more difficult to remove the cutting fluid adhering to the surface of the chips. For this reason, the cutting fluid is wasted, and the disposal of the chips becomes complicated because the chips attached to the cutting fluid are discarded.

  Accordingly, an object of the present invention is to separate the chips attached to the cutting fluid discharged from a machine tool such as a lathe or a milling machine into the cutting fluid and the chips, and discharge the chips while increasing the degree of recovery of the cutting fluid. It is to provide a chip conveyor device.

  The chip conveyor device of the present invention includes a cyclone separator for separating the cutting fluid from the chips attached to the cutting fluid discharged from a machine tool such as a lathe or a milling machine, and a cyclonic separator disposed below the cyclone separator. Conveying means comprising a conveying means for receiving and conveying the chips to which the remainder of the cutting fluid discharged from the separator is attached, and a cylindrical connector arranged so as to surround a discharge port below the cyclone separator In this case, the chip is compressed by being transported through a transport path having a predetermined shape while transporting the chips with the remaining cutting fluid attached thereto, and discharged from the chip discharge port. Here, the conveying means used includes a scraper type conveyor in addition to a coil type conveyor or a screw type conveyor.

  According to the present invention, when the chips attached to the cutting fluid discharged from a machine tool such as a lathe or a milling machine are introduced into the cyclone separator, the cutting fluid is removed from the chips by the centrifugal force of the cyclone separator. . The clean cutting fluid is discharged from the upper side of the cyclone separator, for example. Chips with the remaining cutting fluid (cutting liquid adhering to the chip surface) fall below the cyclone separator along the inner wall of the cylindrical connector, etc., and the dropped chips are transported. Is received and transported through the transport path of a predetermined shape, the chips are compressed in the transport path and sequentially discharged from the chip discharge port at the tip of the transport path.

According to the present invention, the conveying path is a hollow cylindrical conveying path, and a coiled conveyor or a screw conveyor as the conveying means is arranged on the cylindrical conveying path, and these coiled conveyor or screw conveyor It is preferable to receive the chips to which the remainder of the cutting fluid discharged from the cyclone separator is attached while rotating, and convey the chips.
According to the present invention, the coil-type conveyor or the screw-type conveyor serves as both the conveying means and the compressing means, so that it is suitable for the case where the chips with the remaining cutting fluid attached are compressed while being conveyed forward. It is.

According to the present invention, the conveyance path is a hollow cylindrical conveyance path, and a compression cylinder that moves so as to be in sliding contact with the inner diameter of the cylindrical conveyance path is connected to the shaft of the screw conveyor. Preferably it is.
According to the present invention, a cylindrical body having an outer diameter slightly smaller than the inner diameter of the cylindrical conveyance path is connected to the shaft of the coil conveyor or the screw conveyor, so that it does not return within the conveyance path. Push and compress the chips strongly.

According to the present invention, the cylindrical conveyance path includes a horizontal conveyance path and an inclined conveyance path that rises at a predetermined angle in front of the horizontal conveyance path, and a chip discharge port having a lid is formed at the tip of the inclined conveyance path. Preferably it is.
According to the present invention, the cylindrical conveyance path includes a horizontal conveyance path and an inclined conveyance path that rises at a predetermined angle in front of the horizontal conveyance path. Chips can be compressed to recover the remainder of the cutting fluid. Moreover, a compressive force works also with a cover body. On the other hand, the cutting fluid is returned to the apparatus and does not stay at the chip discharge port.

  As this invention, it is preferable that the inner wall of the said cylindrical connector becomes wide as it goes to the connection side with a conveyance path. Chips discharged from below the cyclone separator are less likely to adhere to the inner wall of the cylindrical connector, and it is also easy to suppress an increase in the level of the cutting fluid accumulated in the apparatus.

According to the present invention, the inner wall of the tubular connector is narrowed in the vicinity of the lower end and is narrower than the upper side thereof, and then the inner wall becomes wider again toward the connection side of the tubular connector. Preferably it is.
According to the present invention, since a pressure difference larger than the internal pressure on the upper side of the constricted portion can be generated, the chips discharged from the cyclone separator are collected at the center of the constricted portion and strongly discharged to the lower conveying means.

According to the present invention, the cutting fluid is removed from the chips by the centrifugal force of the cyclonic separator, and the chips to which the remainder of the cutting fluid (the cutting fluid attached to the surface of the chips) is attached are below the cyclone separator. The falling chips are compressed while being transported through the transport path while the transport means receives and transports the dropped chips and is discharged from the chip discharge port of the transport path. Therefore, chips can be discharged while increasing the degree of cutting fluid recovery. In particular, it is effective for separating metal chips (powder sludge) to which fine cutting fluid (coolant fluid) is attached.
Further, according to the present invention, since the cylindrical connector is provided, the cutting fluid discharged and stored from the discharge port becomes bulky in the discharge port (opening) below the cyclone separator, and the discharge port is It is possible to prevent the situation of entering, and a stable continuous operation of the cyclonic separator becomes possible.

It is a side view which shows the chip conveyor apparatus of the 1st Embodiment of this invention. It is sectional drawing which shows the chip conveyor apparatus of the said 1st Embodiment. It is sectional drawing which shows the chip conveyor apparatus of the 2nd Embodiment of this invention. It is sectional drawing which shows the chip conveyor apparatus of the 3rd Embodiment of this invention. It is sectional drawing which shows the chip conveyor apparatus of the 3rd Embodiment of this invention. It is a figure which shows the chip conveyor apparatus of the 4th Embodiment of this invention, and is the side view. It is a figure which shows the chip conveyor apparatus of the 4th Embodiment of this invention, and is sectional drawing of the horizontal conveyance path.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a side view of a chip conveyor apparatus according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view. The chip conveyor apparatus 1 according to the first embodiment includes a cyclone separator 2, a cylindrical coupler 3 on which the cyclonic separator 2 is mounted, and a conveyance path 5 coupled to the lower side of the cylindrical coupler 3. Prepare. A screw type conveyor, which is a conveying means 4, is arranged in the conveying path 5. Such a chip conveyor device 1 is arranged and used in the vicinity of a machine tool such as a lathe or a milling machine.

  The cyclonic separator 2 is composed of a cylindrical outer cylinder and a thin conical portion provided integrally with the lower end of the outer cylinder and having an opening at the lower end, and is discharged from a machine tool such as a lathe or a milling machine. Chips (turbid liquid, dirty liquid) adhering to the cutting fluid are introduced from the upper inlet 2b, the centrifuged cutting fluid is discharged from the upper outlet 2a, and the chips x are discharged downward. Discharge from the outlet. At approximately the center of the cylindrical shape, a latch plate 2k that is latched to the cylindrical tubular connector 3 is provided. That is, the type of the cyclonic separator 2 is appropriately selected according to the material and shape of the chips discharged from a machine tool such as a lathe or a milling machine, and the upper opening 3a formed on the upper side of the cylindrical connector 3 It is the structure which can be attached detachably through the latching member 3k. As the cyclonic separator 2, the cyclonic separator 2 is used, and clean cutting fluid is obtained by centrifugal force while retaining unwanted chips inside the circular casing, The adhering chips x are discharged from the discharge port at the lower end. Such a cyclonic separator 2 is mounted by a cylindrical tubular connector 3, and is connected to the conveyance path 5 through the tubular connector 3.

  The cylindrical connector 3 is made of metal having a hollow frustum shape, and a circular flange 3k is attached to the upper opening side of the cylindrical connector 3 so as to engage with the latch plate 2k of the cylindrical cyclone separator 2. Then, the cyclonic separator 2 is mounted, and the lower opening 3 a is connected to an upper opening 5 e formed above the horizontal cylindrical conveyance path 5. The cylindrical connector 3 according to the present embodiment is configured to circulate swarf discharged from the lower side of the cyclone separator 2 (scrap to which cutting fluid is attached because the cutting fluid is separated and discharged by the cyclone) x. The cylindrical diameter of the inner wall increases toward the connecting portion 3k on the lower side so that it can be easily discharged to the cylindrical transport path 5. In addition, although the cyclonic separator 2 of a vertical arrangement | positioning is attached above this cylindrical coupler 13, the cylindrical coupler 13 is good also as the integral cyclone separator 2. FIG.

  A screw type conveyor, which is a conveying means 4, is arranged in the conveying path 5. The conveyance path 5 is horizontal, and the screw conveyor 4 is also arranged horizontally and is rotationally driven by a motor M <b> 2 arranged behind the conveyance path 5. Reference numeral M1 denotes a motor that moves the entire screw conveyor 4 back and forth. The screw type conveyor 4 has a blade 4p attached to the outer periphery of the shaft 4j, and when the shaft 4j is rotated by the motor M2 (when it rotates to the right), its rotational drive (circumferential rotational speed) is faster than the forward and backward movement by the motor M1, For this reason, the chip | tip x adhering to the wing | blade 4p is conveyed in the direction of the front chip | tip discharge port 5z by the wing | blade 4p, and is not returned reversely. Here, the screw type conveyor 4 compresses the chips x while conveying the chips x forward. As a combination of the conveying means 4 and the compressing means, the steel wire is processed into a coil shape and rotated. It is also possible to use a coil-type conveyor (a spiral conveyor without a shaft) for entraining and discharging the chips x. The conveying means 4 directly receives the chips x falling from the cyclone separator 2 while rotating and conveys them while rotating, so that the cutting fluid adhering to the chips x is separated or is about to be separated. You are in a state to do.

  An inclined conveyance path 5A that rises at a predetermined angle is formed in front of the horizontal cylindrical conveyance path 5, and the tip of the inclined conveyance path 5A is formed as a chip discharge port 5z. Accordingly, the chips x transported by the screw type conveyor 4 are particularly strongly compressed in the inclined transport path 5A, and push the chips x1 upwardly of the tilted transport path 5A. A cutting fluid discharge port 5d is provided as a valve at the lower rear side of the cylindrical conveyance path 5, and the cutting fluid adhered to the chips x discharged from the cyclone separator 2 from the cutting fluid discharge port 5d, and the above-mentioned The cutting fluid that exudes from the chips x1 strongly compressed in the inclined conveyance path 5A is discharged. The inclined conveyance path 5A of the present embodiment has a slightly larger diameter toward the chip discharge port 5z, but the same or gradually decreasing the diameter increases the compression rate of the chip x. It is also possible.

  A lid 6 and an air cylinder 6s that opens and closes the lid 6 are attached to the chip discharge port 5z. When the air cylinder 6s is driven, the lid 6 opens and closes via a hinge 6c. As such an opening / closing structure, the lid 6 may be opened / closed by driving the rod 6a of the air cylinder 6s every predetermined time. When the chips x are pushed up and discharged by a predetermined amount, the lid of the air cylinder 6s is opened. It may be opened against the closing action of the body 6. In addition, it can be used in the state opened without providing the cover body 6.

As an example of use of the chip conveyor device 1 according to the present embodiment, chips attached with cutting fluid discharged from a machine tool such as a lathe or a milling machine are introduced into the cyclone separator 2 from the inlet 2b (dirty liquid is introduced. Spray). In the cyclonic separator 2, the cutting fluid is separated from the chips to which the cutting fluid is attached by the centrifugal force (the chips are collected on the nozzle wall surface by the centrifugal force), and the clean cutting fluid rises while being in air contact. , And discharged from the upper discharge port 2a of the cyclonic separator 2. Chip x with the remaining cutting fluid (cutting fluid adhering to the surface of the chip) falls from below the cyclone separator 2 from the lower discharge port 2z via the cylindrical connector 3 (a small amount of cutting fluid). The conveying means 4 directly receives the dropped chips x and conveys the cylindrical conveying path 5.
When transported by the clew conveyor as the transport means 4, the chips x are compressed while being transported, and are sequentially discharged from the chip discharge port 5z at the tip of the inclined transport path 5A. That is, when the chips x are conveyed by the screw conveyor 4, the chips x are compressed even if the conveying path 5 is a horizontal conveying path, but the conveying path 5 of the present embodiment extends in the horizontal direction. Then, since it is sent to the inclined conveyance path 5A formed to rise obliquely upward at a predetermined angle, it is compressed more strongly than in a horizontal state, discharged from the chip discharge port 5z at the tip, and from the chip x The degree of cutting fluid recovery can be increased. On the other hand, the remainder of the cutting fluid falls from the compressed chips x to the lower side of the conveying path 5 due to gravity, and is sequentially discharged from a cutting fluid discharge port 5d provided on the lower side of the conveying path.
Here, since the cyclonic separator 2 is fixed to the cylindrical connector 2, the cyclonic separator 2 is driven stably, and the interior of the cylindrical coupler 2 is the cyclonic separator 2. Since the pressure is lower than the pressure in the lower cone portion (see the reference sign in FIG. 1: P1> P2), the chips x discharged from the lower cone portion easily fall and the liquid level Le. It has become difficult to rise. In other words, the structure is such that the cutting fluid is easily discharged outside the machine. For this reason, the situation where the cutting fluid stored in the discharge port (opening) 2z of the conical part below the cyclone separator 2 can be prevented, and the cyclone separator 2 can be stably operated continuously. Further, the cutting fluid discharge port 5d may not be provided. In this case, the cutting fluid is stored in the inner cylindrical connector 3, but the height position of the chip discharge port 5z is set to the cutting fluid (coolant fluid). If the height of the liquid surface is higher than Le, the chip discharge port 5z can be used without being provided with the lid 6 in an open state.

(Second Embodiment)
FIG. 3 is a cross-sectional view of the chip conveyor device 11 according to the second embodiment of the present invention. In the chip conveyor device 11 according to the present embodiment, the cylindrical connector 13 to which the cyclonic separator 2 arranged vertically is provided with a constricted portion 7 on the lower inner wall thereof. That is, the cylindrical connector 13 is formed with a lower end protruding portion 7a having an inner diameter that is substantially the same from the upper end to the lower side, the inner wall being close to the lower end, and the inner diameter being narrowed smaller than the upper end. After that, the widened portion 7b and the constricted portion 7 are formed where the inner wall becomes wider again toward the connection side of the opening 5e of the cylindrical conveyance path 5. In this way, the constricted portion 7 is formed on the lower side of the tubular connector 13, and the internal pressure P3 below the constricted portion 7 is larger than the internal pressure P2 above the constricted portion 7 (P2 <P3). And P1> P3). Due to this pressure difference, the chips x having a high specific gravity are collected in the center and easily dropped onto the conveying means 4. That is, the pressure P1 in the lower cone portion 12 acts on the portion 7c where the diameter of the constricted portion 7 is the smallest. In addition, although the cyclonic separator 2 of a vertical arrangement | positioning is attached above this cylindrical coupler 13, the cylindrical coupler 13 is good also as the integral cyclone separator 2. FIG.

(Third embodiment)
FIG. 4 is a side view of the chip conveyor device 21 according to the second embodiment of the present invention. In the chip conveyor apparatus 11 of the present embodiment, a compression cylinder 8 is connected to the tip of a shaft 4j of a screw conveyor 4 that is a conveying means 4. The compression cylinder 8 has an outer diameter slightly smaller than the inner diameter of the cylindrical conveyance path 5, that is, is in contact with the inner wall of the cylindrical conveyance path 5, and is made of metal. Then, the entire conveying means 4 is reciprocated by an air cylinder Er, an electric cylinder or the like, whereby the compression cylinder 8 is also reciprocated simultaneously. Reference numeral M denotes a motor that drives the screw type conveyor 4. Other configurations are the same as those in the first embodiment.

Therefore, when the entire conveying means 4 is reciprocated by the air cylinder Er, the compression cylinder 8 also reciprocates simultaneously, thereby compressing the chips x more strongly than in the case of the first embodiment. Will be. That is, when the moving distance is short in the reciprocating operation of the first embodiment, the air cylinder Er may be provided.
The cutting fluid discharge port may be the cutting fluid discharge port 5d of the first embodiment, but the cutting fluid discharge port 5d is formed on the lower side in the vicinity of the joint 5c between the horizontal conveyance path 5B and the inclined conveyance path 5A. Alternatively, the discharge hose may be pulled out from the position 5c and discharged. By discharging from the vicinity of the joint 5c and the like, the remainder of the cutting fluid can be quickly discharged outside the machine without staying in the machine. Further, the cutting fluid discharge port 5d may be provided.

(Fourth embodiment)
Fig.5 (a) is a side view of the chip conveyor apparatus 31 of the 4th Embodiment of this invention, FIG.5 (b) is a partially expanded sectional view. In the chip conveyor device 31 of the present embodiment, the transport means 4 is a scraper type conveyor Sk, and has a horizontal transport path 5B and an inclined transport path 5A, as in the above embodiment. A scraper (oyster plate) S9 is attached to the conveyor belt Sc at a predetermined interval, and the scraper S9 scrapes and discharges the chips x. That is, when each scraper S9 is conveyed obliquely upward at the position of the inclined conveyance path 5A, a compressive force is applied to the chips x at this time. Note that the cutting fluid falls downward from between the conveyor belt and the scraper S9. Also in the present embodiment, after the chips x are conveyed to the diagonally upper end, they are rotated halfway and discharged from the chip discharge port 6. In addition, although the cover body 6 is provided in the position near the upper end of the inclined conveyance path 5A, the height Le of the cutting fluid accumulated in the cylindrical connector 3 is higher than the height position of the chip discharge port 5z. If it is low, the cover 6 can be used without being provided with the lid 6 at the chip discharge port 5z.

As described above, in the above-described embodiment, the cyclone type separator 2 is described as an example of the cyclone type separator. However, as long as the present invention has a structure in which chips are discharged from the lower side in a vertical arrangement, the cyclone type is used. Not only the separator but also various cyclone separators can be used.

Claims (6)

  A cyclonic separator that separates the cutting fluid from the chips attached to the cutting fluid discharged from a machine tool such as a lathe or a milling machine, and a cutting fluid that is disposed below the cyclonic separator and discharged from the cyclonic separator The conveying means for receiving and conveying the chips to which the remainder is attached, and the cylindrical connector for connecting the cyclonic separator and the conveying means, and conveying the chips to which the remainder of the cutting fluid is adhered by the conveying means. A chip conveyor device, wherein chips are discharged from a chip discharge port as chips compressed by conveying a conveying path having a predetermined shape.   The transport path is a hollow cylindrical transport path, and a coil conveyor or screw conveyor as the transport means is arranged on the cylindrical transport path, and the coil conveyor or screw conveyor rotates while the cyclone rotates. 2. The chip conveyor device according to claim 1, wherein the chip conveyor apparatus receives the chips to which the remainder of the cutting fluid discharged from the separator is attached and conveys the chips while compressing the chips.   The conveyance path is a hollow cylindrical conveyance path, and a compression cylinder that moves so as to be in sliding contact with an inner diameter of the cylindrical conveyance path is connected to a shaft of the screw conveyor. The chip conveyor apparatus according to claim 2.   The cylindrical conveyance path is composed of a horizontal conveyance path and an inclined conveyance path that rises at a predetermined angle in front of the horizontal conveyance path, and a chip discharge port having a lid is formed at the tip of the inclined conveyance path. The chip conveyor apparatus according to claim 2 or 3.   5. The chip conveyor device according to claim 1, wherein an inner wall of the cylindrical connector is widened toward a connection side with the conveyance path.   The inner wall of the tubular connector is narrowed in the vicinity of the lower end and is narrower than the upper side thereof, and then the inner wall becomes wider again toward the connection side of the tubular connector. The chip conveyor apparatus according to any one of claims 1 to 4.

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