JP2010240831A - Chip conveyer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chip conveyer which operates, coping with a rapid increase and decrease of a dirty liquid discharged from a machine tool such as a lath and a milling machine, while it is smaller than conventional ones. <P>SOLUTION: The chip conveyer is provided with: a cyclone separator 2; a conveying mechanism 4 which receives a dirty liquid discharged from a separating discharge port 2z formed under the cyclone separator 2, and conveys the liquid through a conveying passage 5 having a predetermined shape so as to discharge cutting chips from a cutting chip discharge port 5z; and a cylindrical connector 3 connecting the cyclone separator 2 and the conveying mechanism 4. A relief circuit discharge port 3b for discharging part of the dirty liquid is formed on the side surface of the cylindrical connector 3, and the height h4 of the relief circuit discharge port 3b is set in a position lower than the height h5 of the cutting chip discharge port 5z. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a chip conveyor device that separates and discharges chips from a dirty liquid mixed with chips discharged from a machine tool such as a lathe or a milling machine, and more particularly, a chip conveyor device to which a cyclone separator is integrally attached. About.

  In machine tools such as lathes and milling machines, cutting fluid (coolant) is supplied to the processing part where the cutting tool such as a tool or cutter and the workpiece (workpiece) come into contact with each other to suppress heat generation at the processing part. The wet type to perform has become mainstream. A chip conveyor device is permanently installed in the wet type machine tool. The chip conveyor device separates and discharges chips (unnecessary solids removed from the workpiece) from dirty liquid (dirty cutting fluid) mixed with chips discharged from the machine tool. By regenerating the clean liquid (clean cutting liquid) from which chips have been removed by the filtering means and supplying it to the machine tool, the cutting liquid is circulated between the machine tool and the chip conveyor device. In this specification, metal scraps removed from workpieces by machining of machine tools or all scraps containing metal are represented as chips, and mustard, curl, small lump, powder, sludge, etc. It is expressed as chips.

  Examples of the filter that is disposed on the chip conveyor device and separates the clean liquid from the dirty liquid mixed with chips include a rotary drum filter, a cyclone separator, and a magnet filter. The rotary drum filter discharges the clean liquid to the outside of the rotary drum by a rotational force (centrifugal force) while retaining chips inside the rotary drum with a mesh (mesh). In the cyclone separator, dirty liquid mixed with chips is poured from the inlet on the side of the housing under pressure to generate a spiral flow (cyclone) inside the housing, separating clean cutting fluid and separating the cyclone separator. While discharging upward, the concentrated dirty liquid is discharged downward from the separation outlet (dirty liquid outlet) at the lower end of the casing. The magnet filter discharges the clean liquid out of the magnet filter while retaining iron chips on a magnetic body incorporated in the housing. Each of these filters is a device for separating a dirty liquid into a clean liquid and a concentrated dirty liquid.

In a chip conveyor device, examples of a transport mechanism that separates and transports chips from dirty liquid mixed with chips include a chain conveyor, a coil conveyor, and a screw conveyor. In the chain conveyor, a plurality of plate plates that convey chip dirty liquid with cutting fluid attached are continuously arranged and spanned between the drive shaft and driven shaft, and chips are conveyed on the plurality of plate plates. While being discharged from the total discharge port above the conveyor, the cutting fluid is passed below the plurality of plate plates. The chip conveyor mechanism of the chain conveyor includes a scraper type conveyor in which a scraping member (scraper plate) for scraping scraps is attached to a conveyor belt, and a magnet type conveyor in which a magnet is attached.
The screw type conveyor rotates the screw with a spiral propeller on the rotating shaft, compresses the chips while conveying them, and discharges them from the discharge port above the conveyor. It is to be moved. The coil-type conveyor moves cutting fluid below the conveyor while compressing and discharging chips from a discharge port above the conveyor while conveying chips by a rotating shaft formed in a spiral coil shape. All of these transport mechanisms are mechanisms that move the cutting fluid below the conveyor while moving the chips to the discharge port above the conveyor.

  In the conventional chip conveyor device, the size of the conveying path is increased in order to increase the chip processing capacity. On the other hand, there are a wide variety of specifications such as the shape, material, and surface roughness of the workpiece (workpiece) processed by the machine tool, and there is a large amount of chips generated from the workpiece depending on the progress of processing. In contrast, the increase / decrease in the amount of cutting fluid (coolant) supplied varies greatly according to the amount of heat generated by the workpiece. That is, generally, the discharge amount of dirty liquid mixed with chips discharged from the machine tool is abruptly fluctuated, and the proportion of chips in the dirty liquid is also largely fluctuated. In order to cope with this sudden increase / decrease in the amount of dirty liquid discharged, it is necessary to use a large conveyance path with a margin in accordance with the instantaneous maximum value of dirty liquid discharged, or to temporarily remove the dirty liquid. Either the capacity of the dirty liquid tank to be stored must be sufficiently increased, or both of them must be carried out.

  As a conventional chip conveyor device, for example, a chain conveyor device shown in Patent Literature 1 and a screw type conveyor device shown in Patent Literature 2 are shown. However, the separation of the chips from the dirty liquid and the clean liquid is insufficient only by using these conveyor devices alone. Therefore, a device has been devised to increase the cleanliness of the clean liquid to be recycled by attaching a rotating drum filter to the chain conveyor (for example, Patent Document 3) or by attaching a cyclone separator or a magnet filter. In addition, the dirty liquid is pumped up and supplied to the cyclone separator, and a part of the clean liquid is separated by the cyclone separator and discharged to the upper side of the cyclone separator. Dirty liquid tank which is discharged and dropped into the dirty liquid tank installed below the cyclone separator and settled and accumulated in the dirty liquid tank over time and stored (sludge called sludge) on the conveyor The liquid processing apparatus (patent document 4) which conveys to the upper side and discharges | emits out of the apparatus is disclosed.

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

  However, it is difficult to say that the conventional conveyor devices disclosed in Patent Documents 1 to 4 can cope with a sudden increase or decrease in the discharge amount of dirty liquid discharged from the machine tool. The reason for this is that it is difficult to predict a sudden increase or decrease in the amount of dirty liquid discharged from the machine tool, and if the amount of dirty liquid discharged from the machine tool increases rapidly, the level of dirty liquid rises. This is because the dirty liquid overflows from the chip discharge port of the conveyor device. On the other hand, if the amount of dirty liquid discharged from the machine tool suddenly decreases, the cyclone separator does not operate normally, and the dirty liquid drips downward from the separation discharge port (dirty liquid discharge port) at the bottom of the housing. As a result, the liquid level of the dirty liquid rises and the dirty liquid overflows from the chip discharge port of the conveyor device. In order to avoid these problems, a large-sized transport path with a sufficient margin should be set according to the instantaneous maximum value of dirty liquid discharge, or the capacity of the dirty liquid tank for temporarily storing dirty liquid should be sufficient. In reality, it is necessary to increase the size or both, and as a result, it is necessary to install a large chip conveyor device.

  Therefore, an object of the present invention is to provide a chip conveyor device that operates in response to a sudden increase / decrease in dirty liquid discharged from a machine tool such as a lathe or a milling machine, although it is a chip conveyor device that is smaller than the conventional one. is there.

  The chip conveyor apparatus of the present invention includes a cyclone separator that separates clean liquid from dirty liquid mixed with chips discharged from a machine tool such as a lathe or a milling machine, and a separation discharge port formed below the cyclone separator. A transport mechanism that receives the dirty liquid discharged from the transport path and transports it in a transport path of a predetermined shape and discharges it as a chip from a chip discharge port disposed at a position higher than the separation discharge port, the cyclone separator, and the cyclone separator A hollow cylindrical connector for connecting to the transport mechanism, and a relief circuit discharge port for discharging a part of the dirty liquid as a side surface of the cylindrical connector or a side surface of the casing of the transport mechanism in the vicinity thereof The height of the relief circuit discharge port is set at a position lower than the height of the chip discharge port.

In the present invention, a dirty liquid mixed with chips discharged from a machine tool such as a lathe or a milling machine is supplied to the cyclone separator, and a part of the clean liquid is separated and discharged by the cyclone separator. On the other hand, the concentrated dirty liquid is discharged from the separation outlet formed below the cyclone separator and falls directly below or along the inner wall of the hollow cylindrical connector to separate the cyclone. From a chip discharge port that is transferred to a transfer mechanism installed below the vessel, and is transferred through a transfer path of a predetermined shape by the transfer mechanism to a position higher than the separation discharge port of the cyclone separator. Is discharged.
According to the present invention, the relief circuit discharge port for discharging a part of the dirty liquid is formed on the side surface of the coupling tool or on the side surface of the casing of the transport mechanism in the vicinity thereof, and the relief circuit discharge port When the level of the dirty liquid rises because the height is set lower than the height of the chip discharge port, excess dirty liquid is discharged from the relief circuit discharge port to the outside of the machine. As a result, the dirty liquid does not overflow from the chip discharge port of the conveyor device.

  The present invention is characterized in that the internal cross-sectional area A of the connector located below the relief circuit discharge port is set to a size larger than the internal cross-sectional area B of the relief circuit discharge port.

The cyclone separator discharges the concentrated dirty liquid downward from its separation outlet. For this reason, during operation of the cyclone separator, the internal pressure P1 of the hollow tubular connector to which the cyclone separator is attached becomes higher than the external pressure P2 (P1> P2), and the external pressure P2 is subtracted from the internal pressure P1. The differential pressure P3 (P3 = P1-P2) is a positive value.
In the present invention, the cross-sectional area is set by setting the internal cross-sectional area A of the coupler below the relief circuit discharge port to a size larger than the internal cross-sectional area B of the relief circuit discharge port (A> B). The cross-sectional area ratio C (C = A / B) obtained by dividing A by the cross-sectional area B is a value larger than 1.
Therefore, according to the present invention, the differential pressure P3 (P3 = P1-P2) is set to the cross-sectional area ratio C (C = C = C = C) with respect to the liquid level of the dirty liquid discharged downward from the separation outlet of the cyclone separator. The pressing force corresponding to the value multiplied by (A / B) produces an action of pressing down the dirty liquid level downward, and prevents the dirty liquid from rising.

  The present invention is characterized in that the height of the separation discharge port of the cyclone separator is set to a position lower than the height of the relief circuit discharge port.

The cyclone separator has a property of discharging the concentrated dirty liquid downward from the separation discharge port and sucking air from the separation discharge port. For this reason, during the operation of the cyclone separator, the liquid level of the dirty liquid moves up and down around the height of the separation outlet.
According to the present invention, the dirty liquid discharged from the separation discharge port during operation of the cyclone separator by setting the height of the separation discharge port to a position lower than the height of the relief circuit discharge port. However, it is not discharged excessively from the relief circuit discharge port.

  In the present invention, the transport mechanism is any of a coil-type conveyor, a screw-type conveyor, or a scraper-type conveyor, and receives the dirty liquid and transports it in the transport path of the predetermined shape to separate and compress it. It is characterized by discharging as chips. In the present invention, it is preferable that the conveying path is a cylindrical conveying path, and the chips are compressed and conveyed while the screw conveyor disposed in the cylindrical conveying path rotates.

  According to the present invention, the transport mechanism is any one of a coil-type conveyor, a screw-type conveyor, and a scraper-type conveyor, and receives the dirty liquid and transports it in the predetermined-shaped transport path for solid-liquid separation. Since the chips are discharged as compressed chips, the chips are discharged together and can be easily disposed of. Further, the transport path is a cylindrical transport path, and the screw conveyor disposed in the cylindrical transport path is compressed and transported while rotating, whereby the received chips are scraped and collected without omission. Discharge from the chip outlet.

  The present invention is characterized in that the chip discharge port is formed by raising the conveyance path at an inclination angle of 30 to 80 degrees with respect to the ground.

  According to the present invention, the chips received on the conveyance path are gradually pushed up and discharged as chips compressed from the chip discharge port while cutting off the liquid, so that it is easy to clean up after the chips. The inclined position of the conveyance path may be a shape rising from an intermediate point of the conveyance path, or may be a shape rising from a chip conveyance start point. If the conveyance path has a simple shape rising straight from the chip conveyance start point, the screw conveyor can be easily rotated even with a small drive motor. On a horizontal floor, the optimum value of the tilt angle is about 60 degrees.

  In the present invention, a plurality of plate plates are continuously arranged, spanned between a drive shaft and a driven shaft, and dirty liquid mixed with chips discharged from a machine tool such as a lathe or a milling machine is added to the plate plate. Chain conveyor that discharges chips from the upper total discharge port while transporting above, a dirty liquid tank that temporarily stores the dirty liquid, and a pump that pumps the dirty liquid from the dirty liquid tank and supplies it to the cyclone separator It is characterized by providing.

According to the present invention, relatively large chips (as a guide, chips having a size of 1 mm or more) are conveyed on a plurality of plate plates of the chain conveyor and discharged from the upper total discharge port, below the plate plates. A relatively small chip (as a guide, a chip having a size of less than 1 mm) is temporarily stored in the dirty liquid tank. The dirty liquid is pumped up from the dirty liquid tank by the pump and supplied to the cyclone separator, and a part of the clean liquid is separated and discharged by the cyclone separator. And the dirty liquid concentrated from the separation outlet is discharged and dropped, and passed to any of a coil-type conveyor, a screw-type conveyor, or a scraper-type conveyor arranged below the cyclone separator, Chips are discharged from the chip discharge port by being compressed and transported through a predetermined-shaped transport path.
In other words, among the chips discharged from a machine tool such as a lathe or a milling machine, relatively large chips (as a guide, chips having a size of 1 mm or more) are separated and discharged by the chain conveyor, and relatively small chips are discharged. Since scraps (as a guide, chips less than 1 mm in size) are separated and discharged by either a coil conveyor, screw conveyor, or scraper conveyor, almost all chips discharged from the machine tool Will surely be discharged.
As the plate plate, a perforated plate plate in which a plurality of through holes are formed on a chip conveying surface of the plate plate, a plate plate with a protrusion in which a plurality of small protrusions are formed on a chip conveying surface of the plate plate, a plate plate A plate plate with a mesh in which a plurality of through windows and a mesh (metal net) covering the through windows are formed on the chip conveying surface, or a plate plate by combining two or all of them is applied.

In the present invention, it is preferable that the screw type conveyor is installed on a casing of the chain conveyor.
According to the present invention, since the screw type conveyor is installed on the casing of the chain conveyor, an arrangement configuration suitable for downsizing of the apparatus is obtained.

In the present invention, it is preferable that the connector is disposed substantially perpendicular to the floor surface, and the cyclone separator is detachably accommodated in the connector.
According to the present invention, by arranging the cylindrical connector substantially perpendicular to the floor surface, the dirty cutting fluid that has fallen directly from the separation outlet of the cyclone separator is shortest to the transport mechanism. Delivered by distance. In addition, by making the cyclone separator detachable from the cylindrical connector, the cyclone separator having the optimum capacity is appropriately replaced according to the amount of dirty liquid discharged from the machine tool and the type of chips. It is easy to respond. As the cyclone separator, a commercially available one can be applied, or a custom specification can be used.

The screw conveyor may be configured such that 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. 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 screw conveyor, so that the chips are pushed forward and compressed strongly in the conveyance path without returning the chips. .
As the shape of the inner diameter of the cylindrical connector, there is a constant straight shape, a wide trumpet shape toward the connection side with the cylindrical transport path, or a funnel shape narrow toward the connection side with the cylindrical transport path. Can be mentioned. Then, by setting the average value of the inner diameter of the cylindrical connector smaller than the average value of the inner diameter of the cylindrical conveyance path, the amount of dirty liquid discharged from the machine tool increases rapidly, and the liquid When the surface rises, the liquid level height of the cylindrical connector becomes higher than the liquid level height of the cylindrical conveying path due to the liquid head difference, so that excess dirty liquid from the relief circuit discharge port. Responsiveness of relief control that discharges water is improved.

According to the present invention, the relief circuit discharge port for discharging a part of the dirty liquid is formed on the side surface of the coupling tool or on the side surface of the casing of the transport mechanism in the vicinity thereof, and the relief circuit discharge port When the level of the dirty liquid rises because the height is set lower than the height of the chip discharge port, excess dirty liquid is discharged from the relief circuit discharge port to the outside of the machine. As a result, the dirty liquid does not overflow from the chip discharge port of the conveyor device.
According to the present invention, by setting the internal cross-sectional area A of the connector below the relief circuit discharge port to a size larger than the internal cross-sectional area B of the relief circuit discharge port, A pressing force corresponding to a value obtained by multiplying the differential pressure P3 (P3 = P1-P2) by the cross-sectional area ratio C (C = A / B) is generated with respect to the liquid level of the dirty liquid discharged downward. As a result, the liquid level of the dirty liquid is pressed downward, and the liquid level of the dirty liquid is prevented from rising.
According to the present invention, the dirty liquid discharged from the separation discharge port during operation of the cyclone separator by setting the height of the separation discharge port to a position lower than the height of the relief circuit discharge port. However, it is not discharged excessively from the relief circuit discharge port.

According to the present invention, by arranging the cylindrical connector substantially perpendicular to the floor surface, the dirty cutting fluid that has fallen directly from the separation outlet of the cyclone separator is shortest to the transport mechanism. Delivered by distance. In addition, by making the cyclone separator detachable from the cylindrical connector, the cyclone separator having the optimum capacity is appropriately replaced according to the amount of dirty liquid discharged from the machine tool and the type of chips. It is easy to respond.

According to the present invention, relatively large chips (as a guide, chips having a size of 1 mm or more) out of chips discharged from a machine tool such as a lathe or a milling machine are separated and discharged by the chain conveyor, Since relatively small chips (as a guide, chips less than 1 mm in size) are separated and discharged by either a coil conveyor, screw conveyor, or scraper conveyor, all discharged from the machine tool The chips are surely discharged.
According to this invention, the said conveyance path is a cylindrical conveyance path, The said screw type conveyor distribute | arranged to this cylindrical conveyance path receives the said chips while rotating, and compresses while conveying the said chips. Thus, the received chips are collected without omission and discharged from the chip discharge port. Then, the chips received in the transport path are gradually pushed up to be discharged as compressed chips from the chip discharge port while draining liquid, and it is easy to clean up the chips.
And the said screw type conveyor is installed on the housing | casing of the said chain conveyor, and it becomes the arrangement | positioning suitable for size reduction of an apparatus.

  Therefore, the present invention realizes a chip conveyor device that operates in response to a sudden increase / decrease in dirty liquid discharged from a machine tool such as a lathe or a milling machine, although it is a smaller chip conveyor device than conventional ones. To do.

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 from the side. It is sectional drawing which shows the chip conveyor apparatus of the 2nd Embodiment of this invention from the side. It is a front view which shows the chip conveyor apparatus of the 3rd Embodiment of this invention. It is a side view which shows the chip conveyor apparatus of the said embodiment. It is sectional drawing which shows the chip conveyor apparatus of the 4th Embodiment of this invention from a side. It is sectional drawing which shows the cylindrical connector concerning this invention from the side. It is sectional drawing which shows the relationship between the separation discharge port and relief circuit discharge port of the cyclone separator which concerns on this invention from a side. It is sectional drawing which shows the other example of the chip conveyor apparatus of the said 4th Embodiment from the side. It is sectional drawing which shows the other example of the chip conveyor apparatus of the said 1st Embodiment from the side. It is sectional drawing which shows the other example of the chip conveyor apparatus of the said 4th Embodiment from the side.

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

(First embodiment)
The side view of the chip conveyor apparatus of the 1st Embodiment of this invention is shown in FIG. Further, FIG. 2 shows a cross-sectional view of the main part showing the internal structure. The chip conveyor apparatus 1 according to the first embodiment of the present invention includes a cyclone separator 2, a hollow cylindrical coupler 3 that stores and holds the cyclone separator 2 in the interior thereof from above, and a cylindrical coupler 3. The cylindrical conveyance path 5 connected with the lower part of this, the screw type conveyor 4 incorporated in the cylindrical conveyance path 5, and the drive means 6 which drives the screw type conveyor 4 are provided. The chip conveyor apparatus 1 of the present invention is installed and used on the ground E and a horizontal floor E near a machine tool such as a lathe or a milling machine.

  The cyclone separator 2 according to the present embodiment has a cylindrical outer cylinder shape at the top, a funnel shape with a central portion that decreases in inner diameter toward the bottom, and a tube shape having an opening at the bottom at the bottom. (Fig. 2). The inside of the cyclone separator 2 has a substantially funnel shape, and dirty cutting mixed with chips (cut chips x here) discharged from a machine tool such as a lathe or a milling machine on the upper side. A dirty liquid supply port 2a for supplying the liquid L1 is disposed, and a clean liquid discharge port 2b for discharging the clean cutting liquid Lc is disposed on the upper surface side thereof. And the lower end of the cyclone separator 2 becomes the separation discharge port 2z which discharges the dirty liquid L2 (L2 = L1-Lc) after separating the clean liquid Lc from the dirty liquid L1.

  The cyclone separator 2 according to the present embodiment spirals into the casing when the dirty liquid L1 mixed with the chips x is fed into the cyclone separator 2 by a transportation means such as a pump from the dirty liquid supply port 2a. A flow (cyclone) is generated, and the clean liquid Lc is separated and discharged from the clean liquid discharge port 2b. Then, the dirty liquid L2 after the clean liquid Lc is separated from the dirty liquid L1 is discharged from the separation discharge port 2z at the lower end of the casing.

  The cylindrical connector 3 according to the present embodiment has a cylindrical outer cylinder at its upper part, a cylindrical part whose diameter is slightly smaller than the upper part, and has an opening 3a at its lower end (FIG. 2). . The tubular connector 3 has a hollow inside and is made of metal such as steel. A circular flange 3k is provided between the upper cylinder and the lower cylinder of the cylindrical connector 3, and a hook-shaped hook plate 2k of the cylindrical cyclone separator 2 is hooked on the circular flange 3k to be bolted. It fixes by fixing means, such as. In the present embodiment, the cyclone separator 2 is detachably accommodated in the cylindrical connector 3. By making the cyclone separator 2 attachable to and detachable from the cylindrical connector 3, the cyclone separator 2 having the optimum capacity is appropriately selected according to the amount of dirty liquid L1 discharged from the machine tool and the type of chips x. Replace and respond.

  The tubular connector 3 according to the present embodiment is disposed substantially vertically with respect to the floor E parallel to the ground. By attaching the cyclone separator 2 substantially vertically to the floor surface E, the dirty cutting fluid L2 in the cyclone separator is dropped from the separation discharge port 2z directly below to the transport mechanism 4 at the shortest distance. Deliver. In the present embodiment, a commercially available cyclone separator 2 is used, but a custom specification may be used. For example, a cyclone separator 2 in which the cyclone separator 2 and the cylindrical connector 3 are integrated may be used.

  A relief circuit discharge port 3b for discharging a part of the dirty liquid L2 is formed on the lower side surface of the tubular connector 3 according to the present embodiment. In the present embodiment, the relief circuit discharge port 3b has a normally open tube shape. An appropriate on-off valve or stopper may be additionally provided at the relief circuit discharge port 3b.

  In the present embodiment, the lower side of the cylindrical coupler 3 is an opening 3a, and the lower part of the cylindrical coupler 3 and the cylinder are aligned with the circular hole 5a formed on the upper side surface of the cylindrical conveyance path 5. The upper surface of the sheet-like conveyance path 5 is connected and fixed by a fixing means such as a bolt. The diameter of the opening 3a is set slightly smaller than the diameter of the circular hole 5a. This is for the purpose of facilitating removal of the dirty liquid L2 from the cylindrical connector 3 to the cylindrical transport path 5. A packing (oil seal) is sandwiched between the overlapping surfaces of the lower surface of the cylindrical connector 3 and the upper surface of the cylindrical conveyance path 5.

  In the present embodiment, a screw conveyor 4 is arranged inside the cylindrical transport path 5 as the transport mechanism 4 (FIG. 2). The screw type conveyor 4 is composed of a rotating shaft 4j and screw blades 4p integrally formed on the outer peripheral side surface of the rotating shaft 4j, and the drive motor 6M and the rotating shaft 4j are connected via a speed reducer 6g. At least the lower half of the inner periphery of the cylindrical conveyance path 5 is in sliding contact with the outer periphery of the screw blade 4p. This is because the chips x received from the cyclone separator 2 are scraped without leakage and compressed while being pushed forward.

  The cylindrical conveyance path 5 according to the present embodiment includes a straight cylindrical horizontal portion 5c installed horizontally with respect to the floor E parallel to the ground, and the floor E from the front end of the screw conveyor 4. It consists of an inclined portion 5b rising at a predetermined inclination angle (FIG. 2). The inclination angle K with respect to the floor E is 30 degrees to 80 degrees. The front side (right side in the drawing) of the inclined portion 5b is a chip discharge port 5z, and the opening diameter of the chip discharge port 5z is set slightly larger than the inner diameter of the horizontal portion 5c. As a substantially trumpet shape. This is to facilitate discharge of the compressed chips x1.

  In this embodiment, the screw type conveyor 4 consisting of the rotating shaft 4j and the screw blades 4p is rotated clockwise by the drive motor 6M (cw in the figure), and the screw blades 4p compress the chips x while conveying them forward. It pushes up toward the upper part of the inclined part 5b in the state of the cut chip x1. By pushing up the compressed chip x1, the cutting fluid adhering to the chip x1 is likely to run out. Accordingly, the chip x1 compressed as the unwanted material L4 is discharged from the chip discharge port 5z to the outside of the machine, while the cutting fluid adhering to the chip x1 travels along the inner wall of the inclined portion 5b by gravity. And returned to the lower side of the inclined portion 5b.

  In this specification, for the sake of convenience, the liquid staying inside the cylindrical connector 3 is referred to as dirty liquid L2, and the liquid staying inside the inclined portion 5b of the cylindrical transport path 5 is referred to as dirty liquid L3. The liquid level height h2 from the floor E of the dirty liquid L3 is set near the upper surface of the inner periphery of the horizontal portion 5c of the cylindrical transport path 5, and the screw type conveyor 4 is immersed in the cutting liquid L2. (Fig. 2). This is to suppress heat generation of the apparatus due to frictional heat with the cylindrical conveyance path 5 and frictional heat with the chips x (x1) as the screw type conveyor 4 rotates.

  In this embodiment, the opening diameter of the chip discharge port 5z of the cylindrical conveyance path 5 is set to be slightly larger than the inner diameter of the horizontal portion 5c of the cylindrical conveyance path 5, and the average value of the inner diameters of the cylindrical connectors 3 is The inner diameter of the cylindrical conveyance path 5 is set slightly smaller than the average value. For this reason, when the cutting fluid is discharged from the separation outlet 2z of the cyclone separator 2, the liquid level from the floor E of the cutting fluid L2 staying inside the cylindrical connector 3 due to the difference in the liquid head. The height h3 becomes larger than the liquid level height h2 from the floor E of the cutting fluid L3 staying inside the inclined portion 5b of the cylindrical conveyance path 5 (h3> h2). Therefore, when the amount of dirty liquid discharged from the machine tool increases sharply beyond the cutting fluid processing capacity of the conveyor device 1 and the liquid level rises, the liquid in the cylindrical connector 3 is caused by the liquid head difference. Since the surface height h3 becomes higher than the liquid surface height h2 of the cylindrical conveyance path 5, the responsiveness of the relief control for discharging the excess dirty liquid from the relief circuit discharge port 3b is improved.

  FIG. 8 is a cross-sectional view showing the relationship between the separation discharge port 2z and the relief circuit discharge port 3b of the cyclone separator 2 according to this embodiment from the side. The cyclone separator 2 according to the present embodiment discharges the concentrated dirty liquid L2 downward from the separation discharge port 2z. For this reason, during the operation of the cyclone separator 2, the internal pressure P1 of the hollow cylindrical connector is higher than the external pressure P2 (P1> P2), and the differential pressure P3 (P3 = P1) obtained by subtracting the external pressure P2 from the internal pressure P1. -P2) is a positive value. In the present embodiment, the internal cross-sectional area A of the connector 3 slightly below the separation discharge port 2z of the cyclone separator 2 is set to a size larger than the internal cross-sectional area B of the relief circuit discharge port.

In this embodiment, by setting the internal cross-sectional area A of the connector slightly lower than the relief circuit discharge port to a size larger than the internal cross-sectional area B of the relief circuit discharge port (A> B), The cross-sectional area ratio C (C = A / B) obtained by dividing the cross-sectional area A by the cross-sectional area B is a value larger than 1.
Therefore, according to the present embodiment, the differential pressure P3 (P3 = P1-P2) is set to the sectional area ratio C with respect to the liquid level of the dirty liquid discharged downward from the separation outlet 2z of the cyclone separator 2. The pressing force corresponding to the value multiplied by (C = A / B) produces the action of pressing down the liquid level of the dirty liquid, and the liquid level of the dirty liquid is prevented from rising. The cross-sectional area ratio C (C = A / B) is set to a value of 2 or more, for example.
Here, FIG. 8A is an example in the case where the height of the separation discharge port 2z of the cyclone separator 2 is set at a position slightly lower than the relief circuit discharge port 3b. The position of the cross-sectional area A is lower than the separation outlet 2z of the cyclone separator 2. FIG. 8B shows an example in which the height of the separation outlet 2z of the cyclone separator 2 is set at a position slightly lower than the relief circuit outlet 3b. The position A is slightly higher than the separation outlet 2z of the cyclone separator 2. FIG. 8C shows a case where the height of the separation discharge port 2z of the cyclone separator 2 is set to a position that is considerably lower than the relief circuit discharge port 3b and protrudes downward from the connector 3. The position of the internal cross-sectional area A of the connector 3 is considerably higher than the separation outlet 2z of the cyclone separator 2.

  In the first embodiment shown in FIG. 2, the separation discharge port 2 z of the cyclone separator 2 is attached in a state of being slightly retracted inside the cylindrical connector 3, and the separation discharge from the ground and the horizontal floor E is performed. The height h <b> 1 of the outlet 2 z is a position slightly higher than the lower surface of the tubular connector 3. The height h1 of the separation discharge port 2z from the floor E is set to a position lower than the height h4 of the relief circuit discharge port 3b from the floor E (h4> h1). Further, the height h6 from the floor E of the dirty liquid supply port 2a of the cyclone separator 2 is set to be larger than the height h4 from the floor E of the relief circuit discharge port 3b of the tubular connector 3 (h6>). h4). And the height h5 from the floor E of the chip discharge port 5z of the cylindrical conveyance path 5 is set larger than the height h4 from the floor E of the relief circuit discharge port 3b of the cylindrical connector 3 (h5). > H4). The height h6 of the dirty liquid supply port 2a from the floor E on the side surface of the casing of the cyclone separator 2 is set to be higher than the height h5 of the chip discharge port 5z of the cylindrical transport path 5 from the floor E. (H6> h5).

  According to this embodiment, when the liquid level height h3 from the floor E of the dirty liquid L2 rises and exceeds the height h4 from the floor E of the relief circuit discharge port 3b of the tubular connector 3, Excess dirty liquid L2 is discharged from the relief circuit discharge port 3b of the mold connector 3, and the dirty cutting liquid L3 does not overflow from the chip discharge port 5z of the cylindrical conveyance path 5. Therefore, the cyclone separator 2 and the screw conveyor 4 can be stably operated continuously without providing special control means.

  According to this embodiment, when the dirty liquid L1 discharged from a machine tool such as a lathe or a milling machine is poured into the dirty liquid supply port 2a of the cyclone separator 2, the clean liquid Lc is separated by the spiral flow (cyclone). The liquid is discharged from the clean liquid discharge port 2b and reused. Then, the dirty liquid L2 is discharged from the separation discharge port 2z and dropped, transferred to the screw conveyor 4, and discharged through the cylindrical transfer path 5 as compressed chips x1 from the chip discharge port 5z. The

  In the first embodiment shown in FIG. 2, the lower part of the cyclone separator 2 has a straight tube shape having an opening at the lower end, but the lower part of the cyclone separator 2 shown in FIG. 10 spreads toward the lower end. A trapezoidal conical tube shape having an opening may be used. By adopting such a trapezoidal conical tube shape, chips are not clogged in the cyclone separator 2. Further, the height of the separation discharge port 2z of the cyclone separator 2 may be set at a position slightly lower than the relief circuit discharge port 3b (FIG. 2), or the height of the separation discharge port 2z of the cyclone separator 2 May be set at a position slightly lower than the relief circuit discharge port 3b (FIG. 10).

  In 1st Embodiment mentioned above, although the screw type conveyor 4 was employ | adopted as the conveyance mechanism 4, using a coil type conveyor which processes a steel wire into a coil shape, rotates this, and entrains and discharges the chip x. Is also possible. It is also possible to increase the bulk and compression ratio of the compressed chips x1 by adding a drive motor for forward and backward movement and moving the screw conveyor 4 forward and backward while rotating. Although the chip discharge port 5z is in an open state, an openable / closable lid 6 may be provided in the chip discharge port 5z.

(Second Embodiment)
FIG. 3 shows a cross-sectional view of the main part showing the internal structure of the chip conveyor device according to the second embodiment of the present invention. The chip conveyor device 11 of this embodiment has a device configuration in which a cylindrical conveyance path 5 containing a screw type conveyor 4 is installed on a casing of a chain conveyor 9. The chain conveyor 9 is configured such that a plurality of plate plates 8 are continuously arranged and spanned between the drive shaft 8M and the driven shaft R to form a transport path, and the housing is slanted at an intermediate point of the transport path. It has stood up and has a lower supply port 9a for carrying chips and an upper total discharge port 9z for discharging chips. The plate plate 8 is a plate plate with a mesh in which a plurality of through windows and a mesh (metal net) covering the through windows are formed on a chip conveying surface.

  The cylindrical conveyance path 5 of the present embodiment rises in a straight shape from the chip conveyance start point, and the upper part of the rotating shaft 4j of the screw conveyor 4 is connected to a small drive motor 6M via a speed reducer 6g. Is done. The inclination angle K formed by the ground, the horizontal floor surface E, and the inclined portion of the casing of the chain conveyor 9 is set to about 60 degrees, and the inclination angle of the cylindrical conveyance path 5 is also about 60 degrees.

  In the present embodiment, the cylindrical connector 3 is integrally formed with the casing of the cylindrical conveyance path 5 and is disposed substantially vertically with respect to the floor E parallel to the ground. A cyclone separator 2 is housed and fixed in the tubular connector 3 with the separation outlet 2z facing downward. The separation outlet 2z of the cyclone separator 2 is set at a position lower than the relief circuit outlet 3b. Moreover, the chip discharge port 5z of the cylindrical conveyance path 5 is set to a position higher than the relief circuit discharge port 3b.

  In the present embodiment, the inner surface of the side surface of the tubular connector 3 is provided with a liquid level detection sensor 3s that detects the liquid level of the dirty liquid L2 in the tubular connector 3. The liquid level detection sensor 3s is a float switch. The liquid level detection sensor 3s is set at a position higher than the relief circuit discharge port 3b, and sends a liquid level detection signal to the control circuit 7 when the liquid level rises above the relief circuit discharge port 3b and reaches a predetermined height. . And the control circuit 7 which received this liquid level detection signal sends out a stop signal to the pump P, and the pump P stops.

  According to this embodiment, among the chips discharged from the machine tool M, relatively large chips y (as a guide, chips having a size of 1 mm or more) are separated by the chain conveyor 8 and discharged. Since small chips x (as a guide, chips having a size of less than 1 mm) are separated and discharged by the screw conveyor 4, all the chips x and y discharged from the machine tool M are reliably discharged. The Rukoto. The chips x and y are discharged as an unnecessary object L5 from the total discharge port 9z.

(Third embodiment)
The front view which shows the internal structure of the chip conveyor apparatus of the 3rd Embodiment of this invention is shown in FIG. FIG. 5 is a side view of FIG. The chip conveyor device 21 of the present embodiment has a device configuration in which a device similar to the chip conveyor device 1 of the first embodiment is installed on the casing of the chain conveyor 9 shown in the second embodiment. According to these embodiments, the arrangement is suitable for downsizing the apparatus.

(Fourth embodiment)
The cross section which shows the internal structure of the chip conveyor apparatus of the 4th Embodiment of this invention from a side is shown in FIG. In the chip conveyor device 31 of the present embodiment, the cylindrical connector 3 is integrally formed perpendicularly to the floor surface E from the lower side of the rectangular conveyance path 5 having a built-in scraper type conveyor. It is an apparatus structure in which the separator 2 is accommodated. In the scraper type conveyor, a chain conveyor is stretched between a drive shaft 8M and a driven shaft R to form a conveyance path, and a scraper 41 attached to the chain conveyor at a predetermined interval is provided on the casing of the rectangular conveyance path 5. The chips that have fallen to the inner bottom are scraped up and lifted up above the casing of the rectangular tube-shaped transport path 5. Chips compressed in the process of being scraped by the scraper 41 fall from the discharge port 5z above the casing of the rectangular transport path 5 to the outside of the machine and are stored in the disposal box 51. The chip conveyor device 31 of the present embodiment is provided with a plurality of casters 52 to facilitate the movement of the device. An inclination angle K formed by the horizontal floor surface E and the inclined surface of the casing of the rectangular conveyance path 5 is set to about 60 degrees. According to this embodiment, sludge-like cutting waste can be swept up by the scraper 41 while being settled on the bottom of the casing and discharged out of the machine from the discharge port 5z.

In the fourth embodiment shown in FIG. 6, the lower part of the cyclone separator 2 has a straight pipe shape having an opening at the lower end. However, this length is reduced by reducing the length of the straight pipe of the cyclone separator 2 shown in FIG. It is also possible to have a shape in which a pipe larger than the straight pipe is attached below. In this case, the chips are not clogged in the cyclone separator 2, and the discharge sound of dirty liquid from the cyclone separator 2 is generated. There is also an effect of decreasing. And the upper part of the cyclone separator 2 can be made the arrangement | positioning which protruded upwards from the cylindrical connector 3 (FIG. 11).

FIG. 7 is a cross-sectional view showing a cylindrical connector according to any one of the above-described embodiments from the side. In the cylindrical connector 3 illustrated in FIG. 7A, a relief circuit discharge port 3b is formed on the side surface of a straight cylindrical body, and a flange (flange) 3j for attaching to the conveyance path 5 at the lower end of the cylindrical body. A flange 3k for attaching the cyclone separator 2 to the upper portion of the cylindrical body is provided, and a box-shaped cover 3m that covers the head of the cyclone separator 2 is formed on the upper portion of the flange 3k. This corresponds to the embodiment. In the example shown in FIG. 7A, the opening diameter of the opening 3a at the lower end of the cylindrical body and the opening diameter of the opening 3a at the upper end of the cylindrical body are the same size.
In the example shown in FIG. 7B, a simple structure in which a side hole 3b as a relief circuit discharge port is formed on the side surface of a straight cylindrical body, and flanges 3k and 3j are provided at the upper end and the lower end of the cylindrical body, respectively. This is a cylindrical connector 3.
In the example shown in FIG. 7C, the relief circuit discharge port 3b is formed on the side surface of the trumpet-shaped cylindrical body that is wide toward the flange 3j. In the example shown in FIG. 7C, the opening diameter of the opening 3a at the lower end of the cylindrical body is set larger than the opening diameter of the opening 3a at the upper end of the cylindrical body.

  As described above, the present invention is not limited to the embodiment described above. For example, the cylindrical connector 3 may have a rectangular tube shape, and for example, the transport mechanism 4 can be a coiled conveyor. In the second and third embodiments described above, the chips x and y are collectively discharged from the total discharge port 9z, but the chips x and y are discharged from separate discharge ports. Also good. Thus, it goes without saying that the present invention can be modified as appropriate without departing from the spirit of the present invention.

1,11,21,31 The chip conveyor device of the present invention,
2 cyclone separator,
2b Clean liquid outlet,
2z separation outlet (dirty liquid outlet),
3 tubular connector,
3b Relief circuit outlet,
4 Conveying mechanism (screw type conveyor, scraper type conveyor),
5 transport path (cylindrical transport path, rectangular tube transport path),
5z chip outlet,
6 Driving means,
7 Control circuit,
x, y chips,
L1, L2 Dirty liquid,
Lc clean liquid

Claims (9)

  A cyclone separator that separates clean liquid from dirty liquid mixed with chips discharged from machine tools such as lathes and milling machines, and dirty liquid discharged from a separation outlet formed below the cyclone separator. A transport mechanism for transporting the inside of the transport path of a predetermined shape and discharging the chips as chips from a chip discharge port disposed at a position higher than the separation discharge port, and a hollow connecting the cyclone separator and the transport mechanism. A relief connection outlet for discharging a part of the dirty liquid is formed on a side surface of the cylindrical connection device or on a side surface of the casing of the transport mechanism near the discharge port. A chip conveyor device characterized in that a height of the outlet is set at a position lower than a height of the chip discharge port.   2. The chip conveyor apparatus according to claim 1, wherein an internal cross-sectional area A of the connector located below the relief circuit discharge port is set to a size larger than an internal cross-sectional area B of the relief circuit discharge port. 3. The chip conveyor apparatus according to claim 1, wherein the height of the separation discharge port of the cyclone separator is set at a position lower than the height of the relief circuit discharge port.   The transport mechanism is one of a coil-type conveyor, a screw-type conveyor, or a scraper-type conveyor, and receives the dirty liquid and transports it in the transport path of the predetermined shape to discharge it as solid waste and compressed chips. The chip conveyor apparatus according to any one of claims 1 to 3, wherein the chip conveyor apparatus is provided.   5. The chip conveyor apparatus according to claim 4, wherein the conveying path is a cylindrical conveying path, and the screw conveyor disposed in the cylindrical conveying path compresses and conveys the chips while rotating.   6. The chip conveyor apparatus according to claim 1, wherein the chip discharge port is formed by raising the conveyance path at an inclination angle of 30 degrees to 80 degrees with respect to the ground.   A plurality of plate plates are continuously arranged and spanned between a drive shaft and a driven shaft, and dirty liquid mixed with chips discharged from a machine tool such as a lathe or a milling machine is conveyed on the plate plate. A chain conveyor for discharging chips from the upper total discharge port, a dirty liquid tank for temporarily storing the dirty liquid, and a pump for pumping the dirty liquid from the dirty liquid tank and supplying it to the cyclone separator. The chip conveyor apparatus according to claim 4, wherein the chip conveyor apparatus is characterized.   The chip conveyor apparatus according to claim 7, wherein the screw type conveyor is installed on a casing of the chain conveyor. The chip conveyor apparatus according to any one of claims 1 to 8, wherein the connector is disposed substantially perpendicular to the floor surface, and the cyclone separator is detachably accommodated in the connector. .

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