JP2008207314A - Chip powder collecting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chip powder collecting system capable of efficiently discharging chip powder to the outside of a machine tool without using a chip conveyor. <P>SOLUTION: This chip powder collecting system comprises the machine tool 1 comprising a table 21 for loading a cut object, a cutting tool 15 for cutting the cut object, and a liquid injection device 60 for injecting liquid to the cut object, a chip powder discharge passage 22 as a flow channel formed along the table 21, a chip powder storage 30 disposed at one end 22a of the chip powder discharge passage 22, and a cutting liquid storing tank (liquid tank) 40 for storing the cutting liquid supplied to the liquid injection device 60. The liquid injection device 60 injects the cutting liquid toward the cut object to sweep away the chip powder toward the chip powder discharge passage 22, and to convey the chip powder to the chip powder storage 30 with the cutting liquid through the chip powder discharge passage 22. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cutting powder collection system provided in a machine tool, and more particularly to a cutting powder collection system used in, for example, a portal machining center.

  In the cutting process, for example, a cutting tool attached to a spindle of a machine tool rotates and approaches a workpiece placed on a table, and the cutting tool's blade portion comes into contact with the workpiece and the workpiece ( This is a processing method of processing a workpiece into a desired shape by cutting a workpiece. As machine tools, there are types such as vertical machines and horizontal machines depending on the arrangement shape of the main shaft, and in recent years, a 5-face machine capable of cutting the workpiece from the vertical and horizontal directions by attaching an attachment to the tip of the main shaft. There is also what is called.

  When cutting is performed, cutting powder called dairy powder or chips scraped from the workpiece is generated, and the cutting powder is applied to the table provided on the machine tool or the workpiece placed on the table. Scattered. This cutting powder is sometimes scattered outside the machine tool, and the working environment of the operator is deteriorated. When the cutting powder is scattered outside the machine tool in this way, it takes time and labor to clean the cutting powder, so that the productivity of the cutting process is deteriorated. Therefore, some machine tools are covered with a cover so that cutting powder does not jump out of the machine tool.

  Even if the cutting powder does not jump out of the machine tool and remains in the machine tool, if the cutting powder remains on the table or work piece, a pile of cutting powder is created and the cutting tool moves. May interfere. Sometimes cutting powder enters between the cutting tool and the work piece, interferes with the cutting tool's blade part, impedes cutting, and sometimes damages the cutting tool and shortens the life of the cutting tool. In some cases, the workpiece may be damaged. Therefore, in cutting using a machine tool, it is necessary to remove the cutting powder from the machine tool using some means.

  In order to remove the cutting powder, for example, an operator operating a machine tool uses a cleaning tool to discharge the cutting powder to the outside, or high-pressure air is blown against the cutting powder to remove the cutting powder and It is common to perform work such as moving away from the workpiece. However, in order to perform this operation, the operator must always monitor the machine tool being processed to grasp the state of the cutting powder. In recent years, machine tools have become mainstream what are called NC machines that perform cutting without bothering people according to a program that controls the movement of the cutting tool relative to the workpiece, but there is a problem with cutting powder. As far as this NC machine is, it is difficult to perform unmanned operation completely.

  In relation to this problem, Patent Document 1 discloses a machine tool including a chip conveyor that conveys cutting powder generated by cutting. This chip conveyor is a mechanical conveyor device that circulates over the chip conveyance path, and has a plurality of scrapers that scoop off the cutting powder generated by the cutting process and convey it to the chip discharge port. By using such a chip conveyor, it is possible to discharge the cutting powder generated inside the machine tool to the outside of the machine tool and reduce the amount of cutting powder staying inside.

  JP 05-31645 A

  In recent years, high-rotation type cutting machine tools have become widespread for some materials (aluminum and the like) that allow cutting tools to process at a high rotational speed of 10,000 to 30,000 rpm. For example, when this type of high-rotation cutting machine tool is used to increase the cutting feed at a rotational speed of 25000 rpm and cut aluminum or the like, the table of the machine tool and the work to be cut can be cut from several minutes to several tens of minutes. A situation occurs where it is filled with powder.

  Even if it is attempted to discharge cutting powder using a conventional chip conveyor for such processing, the amount of cutting powder increases in the machine tool because the generated amount is larger than the amount of cutting powder discharged. As a result, machining becomes impossible during machining. In this case, it is difficult to shorten the processing lead time because the processing must be temporarily stopped and the cutting powder in the machine tool must be discharged manually to restart the processing.

  Even if a chip conveyor is used, the cutting powder is not discharged to the outside of the machine tool unless it is sent to the chip conveyor. Therefore, for example, in the case of a gate-type machine tool having a large table (for example, a width of 2 m or more), the cutting powder easily collects on the table without being conveyed to the chip conveyor. It will be necessary to resume the processing after the cutting powder is discharged manually.

  In addition, even if cleaning is performed, if cutting powder is placed on the chip conveyor beyond the carrying capacity of the chip conveyor, the chip conveyor will stop due to overload, so it is not possible to place a large amount of cutting powder on the conveyor at once. Can not. Therefore, the cutting powder must be written on the chip conveyor in several times so as not to exceed the carry-out capacity of the chip conveyor, which requires a lot of labor and time.

  The present invention has been made in view of the above, and an object thereof is to provide a cutting powder collecting system capable of efficiently discharging cutting powder to the outside of a machine tool without using a chip conveyor. .

  The present invention is achieved by the following configurations.

(1) A table on which a workpiece is placed, a cutting tool that cuts the workpiece, and a machine tool that includes a liquid ejecting apparatus that ejects liquid onto the workpiece;
A flow path disposed along the table;
Cutting powder storage provided at one end of the flow path,
A liquid tank for storing the liquid supplied to the liquid ejecting apparatus,
The liquid ejecting apparatus ejects the liquid toward the workpiece to push the cutting powder toward the flow path, and conveys the cutting powder together with the liquid to the cutting powder storage through the flow path. Cutting powder collection system characterized by doing.
(2) The cutting powder according to (1), wherein the cutting powder storage includes a filter that separates the cutting powder and the liquid, and the liquid separated by the filter is sent to the liquid tank. Collection system.
(3) The cutting powder according to (1) or (2), further comprising a pump that sends the liquid stored in the liquid tank toward the flow path and increases the flow rate of the flow path. Collection system.
(4) The machine tool is a portal machine tool that drives the table along a predetermined direction,
The cutting flow collection system according to any one of (1) to (3), wherein the flow path is provided on both sides of the table along a driving direction of the table.
(5) The cutting powder collection system according to any one of (1) to (4), wherein the cutting powder storage is provided below a front floor of the machine tool.

  According to the cutting powder recovery system of the present invention, the cutting powder can be transported from the machine tool to the cutting powder storage using only the cutting fluid that is a liquid. Can be prevented in advance. Further, in the cutting powder collecting system according to the present invention, since the cutting fluid is merely used without using a chip conveyor or the like having a complicated mechanical mechanism, the machine tool can be stably operated with few failures. . In addition, since a large amount of cutting fluid is used to transport cutting powder with the cutting fluid, it is possible to significantly reduce the temperature change due to cutting of non-cutting objects compared to the past, and it is possible to perform highly accurate cutting. It becomes possible.

  Moreover, according to the cutting powder collection | recovery system concerning this invention, the cutting powder storage is equipped with the filter which isolate | separates cutting powder and cutting fluid, and the liquid isolate | separated with the filter is sent to a tank. That is, the cutting fluid circulates in the cutting powder collection system. Accordingly, the cutting fluid used for cutting and cutting powder conveyance can be used again for cutting and cutting powder conveyance.

  Moreover, according to the cutting powder collection | recovery system concerning this invention, the pump which sends out the cutting fluid stored in the tank toward the flow path and increases the flow volume of a flow path is provided. Therefore, even if a large amount of cutting powder is generated by cutting and a large amount of cutting powder flows into the flow path, the cutting powder can be quickly discharged from the machine tool.

  In the present invention, it is preferable to apply the cutting powder collecting system to the portal machine tool. In a gate-type machine tool, particularly a large machine tool having a table width exceeding 1 m and 3 m or more, it has been difficult to efficiently discharge cutting powder. Like the recovery system, the flow path is arranged so as to be provided on both sides of the table along the driving direction of the table, and the cutting powder is discharged to the flow path by flowing a large amount of cutting fluid, without human intervention. Cutting powder can be efficiently discharged.

  Further, in the cutting powder collecting system according to the present invention, the cutting powder storage is provided under the front floor of the machine tool, so that the operator can easily grasp the volume state of the cutting powder and does not hinder normal work. A storage can be provided.

  Hereinafter, an embodiment of a cutting powder collecting system according to the present invention will be described with reference to the drawings.

  FIG. 1 is a sectional view of a machine tool used in the cutting powder collecting system of the present embodiment as viewed from the front direction, FIG. 2 is a side view thereof, and FIG. 3 is a machine tool for the cutting powder collecting system of the present embodiment. It is a schematic diagram which shows the positional relationship of a machine. FIG. 4 is a block diagram showing the entire cutting powder collecting system of the present embodiment.

  As shown in FIG. 1, the machine tool 1 according to the present embodiment includes two columns 11 and 11 erected on both the left and right sides of the floor surface 5 a of the floor portion 5, and the columns 11 and 11 are substantially positioned with respect to the floor 5. A cross rail 12 fixed in parallel and provided so as to be slidable along the vertical direction of the floor surface 5a according to a drive device (not shown) provided inside the columns 11 and 11, and provided inside the cross rail 12. The spindle drive unit 13 is slidably moved along the longitudinal direction of the cross rail 12, that is, the horizontal direction in accordance with a drive device (not shown), and can move up and down vertically from the spindle drive unit 13. And a quill 14 to which a cutting tool 15 is attached at the tip. A cross beam 16 provided substantially parallel to the cross rail 12 is fixed to the ends of the two columns 11 and 11. The cross beam 16 holds the two columns 11 and 11 so as to keep them in a vertical state.

  Further, the machine tool 1 extends between the columns 11 and 11 and the longitudinal direction thereof extends in a direction perpendicular to the transition direction of the columns 11 and 11 and the cross rail 12, and holds the table 21 on the upper surface side. A bed 20 is provided. The bed 20 has rails 20b and 20b on both sides of the upper surface 20a in the longitudinal direction, and a table 21 is arranged along the rails 20b and 20b so as to be movable in parallel. The upper surface 21a of the table 21 is provided so as to be substantially parallel to the horizontal plane. A workpiece to be cut is disposed on the upper surface 21 a of the table 21.

  The machine tool 1 of the present embodiment includes a slide direction of the table 21 (hereinafter referred to as the X direction), a slide direction of the spindle drive unit 13 (hereinafter referred to as the Y direction), and a slide direction of the cross rail 12 (hereinafter referred to as the Y direction). Are referred to as “Z direction”). Further, the moving direction of the quill 14 is provided so as to be parallel to the sliding direction of the cross rail 12. Therefore, the machine tool 1 changes the table 21 in the X direction, changes the spindle driving unit 13 in the Y direction, and changes the cross rail 12 and the quill 14 in the Z direction to thereby change the upper surface 21a of the table 21. It is possible to freely bring the cutting tool 15 closer to the workpiece placed above from six directions in the vertical and horizontal directions. A spindle mechanism (not shown) is provided inside the quill 14. In the machine tool 1, the cutting tool 15 rotates according to the rotation of the spindle mechanism, and the workpiece is processed into a desired shape.

  On the table 21 side of the cross rail 12 or the spindle drive unit 13, a plurality of cutting fluid discharge pipes 18 for injecting a cutting fluid (cutting water or cutting oil) for cutting to a workpiece at the time of cutting are provided. ing. This cutting fluid discharge pipe 18 is a blowout port for cutting fluid supplied from a liquid ejecting apparatus 60 described later, and this cutting fluid improves cutting conditions during cutting. Further, a large amount of cutting fluid is supplied from the cutting fluid discharge pipe 18 to such an extent that the cutting powder deposited on the upper surface 21a of the table 21 or the workpiece is removed by cutting. The cutting fluid supplied here needs to have a pressure and a flow rate enough to blow off the cutting powder, although it varies depending on the material of the cutting powder.

  Further, as shown in FIG. 2, the machine tool 1 is provided with a cover 26 provided so as to cover a part of the side surface and the upper surface of the table 21 with a predetermined interval. This cover 26 is provided in order to prevent cutting powder generated by cutting from scattering outside the machine tool. In the present embodiment, as shown in FIG. 2, it is arranged only on the front side of the machine tool 1, but the present invention is not limited to this, and the rear side of the machine tool may be covered, or the entire table 21 may be completely covered. You may arrange | position so that it may cover.

  On both sides of the table 21 in the longitudinal direction, there are provided cutting powder discharge passages (flow paths) 22 for discharging cutting powder generated by cutting the workpiece with the cutting tool 15 to the outside of the machine tool 1. ing. The cutting powder discharge path 22 is a U-shaped toy (see FIG. 1) having a U-shaped cross-sectional view with an upper surface opened. As shown in FIG. 3, one end 22 a of the cutting powder discharge path 22 is connected to the cutting powder storage 30, and the other end 22 b is connected to the pump 50. The cutting powder discharged from the upper surface 21a of the table 21 or from the workpiece by the cutting fluid flows into the cutting powder discharge path 22. The cutting powder flowing into the cutting powder discharge path 22 together with the cutting fluid is conveyed by the cutting fluid along the cutting powder discharge path 22 and discharged toward the cutting powder storage 30. It is preferable that the cutting powder discharge path 22 is disposed so as to be inclined toward the cutting powder storage 30 so as to easily flow toward the cutting powder storage 30.

  Further, even when a large amount of cutting powder deposited on the summit or the like on the table 21 is poured all at once so that the cutting powder discharge path 22 becomes full, the material of 22 is made of a small friction coefficient such as stainless steel abrasive. If the material is used, for example, aluminum cutting powder, the cutting powder can be easily poured into the cutting powder storage 30 without adding manpower if the flow rate of the cutting fluid is appropriate.

  The cutting powder storage 30 is a storage that receives the cutting fluid and cutting powder flowing from the cutting powder discharge path 22 and stores only the cutting powder. The whole shape of the cutting powder storage 30 of the present embodiment is defined by a recess 33 formed by digging the front floor 5 of the machine tool 1. A cutting powder storage container 31 that is detachably disposed is disposed in the gate portion 33.

  The cutting powder container 31 is a substantially box-shaped container having an upper surface opened, and is configured such that cutting fluid and cutting powder flow from the upper surface. The cutting powder container 31 is provided with a plurality of holes 31a that are large enough to allow cutting fluid to pass but not cutting powder. Therefore, only the cutting powder accumulates in the cutting powder container 31, and the cutting fluid is discharged to the outside of the cutting powder container 31. That is, the cutting powder container 31 serves as a filter that separates the cutting powder and the cutting fluid. The cutting fluid discharged from the cutting powder container 31 passes through the cutting fluid discharge path 35 and is discharged from the cutting powder storage 30 toward a cutting fluid storage tank 40 described later.

  Here, the upper surface side of the cutting powder storage 30 is detachably provided with a lid 34 configured to be substantially flush with the floor surface of the floor portion 5. When the cutting powder storage container 31 in the cutting powder storage 30 is filled with cutting powder, the lid 34 is removed, the cutting powder storage container 31 is taken out, and the cutting powder in the cutting powder storage container 31 is exposed to the outside. By discharging and rearranging, the inside of the cutting powder storage 30 can be returned to the initial state. Here, since the lid 34 is disposed so as to be substantially flush with the floor surface of the floor portion 5, when the machine tool 1 is used for machining, the cutting powder storage 30 prevents the work from being performed. It will never be. Here, preferably, if the lid 34 has, for example, a lattice-shaped mesh hole, the operator can always grasp the state of the cutting powder container 31 and the cutting powder end container at an appropriate time. The cutting powder in 31 can be discharged.

  Here, in discharging the cutting powder inside the cutting powder container 31 to the outside, a chip conveyor extending outside from the cutting powder container 31 is provided so that the cutting powder is automatically taken out without human intervention. You may comprise. Furthermore, you may provide the volume reduction apparatus which presses and solidifies the cutting powder in the cutting powder storage container 31, and makes a volume small.

  Next, the overall configuration and operation of the cutting powder collection system of this embodiment will be described with reference to FIG. In the following description, there is a part that has already been described when the hardware configuration is described, but an overlapping part will be described without omitting it.

  Cutting fluid is supplied to the machine tool 1 from a cutting fluid storage tank 40 that stores the cutting fluid. The machine tool 1 injects the cutting fluid supplied from the cutting fluid storage tank 40 to the workpiece through the liquid injection device 60 during the cutting process. The cutting powder generated by this cutting is pushed along with the cutting fluid from the upper surface 21 a of the table 21 and the workpiece, and is sent to the cutting powder discharge path 22.

  The cutting powder discharge path 22 pushes the cutting powder with the cutting fluid sent from the machine tool 1 and sends it to the cutting powder storage 30. Here, when the amount of cutting powder is large relative to the flow rate of the cutting fluid and the flow of cutting powder is poor, the cutting fluid is further flowed from the pump 50 connected to the other end of the cutting powder discharge path 22. . The pump 50 is configured to directly supply the cutting fluid stored in the cutting fluid storage tank 40 to the cutting powder discharge path 22 and to increase the flow rate of the cutting powder discharge path 22 to a level sufficient for cutting powder conveyance. Have a role to play.

  The cutting powder and the cutting fluid that have flowed into the cutting powder storage 30 are separated into the cutting fluid and the cutting powder in the cutting powder storage 30. Here, the cutting powder is deposited in the cutting powder storage 30 as it is, and the cutting fluid is supplied to the cutting fluid storage tank 40. That is, in the cutting powder collection system of the present embodiment, the cutting fluid is configured to circulate inside the cutting powder collection system. That is, the cutting fluid plays a role of improving the cutting conditions at the time of cutting, and also plays a role as a transport medium for transporting the cutting powder.

  As described above, the cutting powder collecting system according to the present embodiment includes the table 21 on which the workpiece is placed, the cutting tool 15 that cuts the workpiece, and the liquid ejecting apparatus 60 that ejects liquid onto the workpiece. Supplied to the machine tool 1 provided, the cutting powder discharge path 22 as a flow path disposed along the table 21, the cutting powder storage 30 provided at one end 22 a of the cutting powder discharge path 22, and the liquid ejecting apparatus 60. And a cutting fluid storage tank (liquid tank) 40 for storing the cutting fluid to be used. Then, the liquid ejecting device 60 sprays the cutting fluid toward the workpiece to push the cutting powder toward the cutting powder discharge path 22 and cuts the cutting powder together with the cutting liquid through the cutting powder discharge path 22. It conveys to the powder storage 30.

  Therefore, according to the cutting powder recovery system of the present embodiment, the cutting powder can be conveyed from the machine tool 1 to the cutting powder storage 30 using only the cutting fluid that is a liquid. Accumulation of the cutting environment can be prevented in advance. Moreover, in the cutting powder collection system of this embodiment, since the cutting fluid is simply used without using a chip conveyor or the like having a complicated mechanical mechanism, the machine tool 1 can be operated stably with few failures. it can. In addition, since a large amount of cutting fluid is used to transport the cutting powder with the cutting fluid, the temperature change due to cutting of non-cutting objects can be reduced compared to conventional methods, and high-precision cutting can be performed. It becomes.

  Moreover, according to the cutting powder collection | recovery system of this embodiment, the cutting powder storage 30 is equipped with the cutting powder storage container 31 as a filter which isolate | separates cutting powder and cutting fluid, and isolate | separated with the cutting powder storage container 31. The liquid is sent to the cutting fluid storage tank 40. That is, the cutting fluid circulates in the cutting powder collection system.

  Accordingly, the cutting fluid used for cutting and cutting powder conveyance can be used again for cutting and cutting powder conveyance.

  Moreover, according to the cutting powder collection | recovery system of this embodiment, the pump 50 which sends out the cutting fluid stored in the cutting fluid storage tank 40 toward the cutting powder discharge path 30, and increases the flow volume of a cutting powder discharge path is provided. ing. Therefore, even if a large amount of cutting powder is generated by cutting and a large amount of cutting powder flows into the cutting powder discharge path, the cutting powder can be quickly discharged from the machine tool 1.

  In the present embodiment, the cutting powder collecting system is applied to a portal machine tool. In a gate type machine tool, particularly a large machine tool having a table width exceeding 1 m and 3 m or more, it has been difficult to efficiently discharge cutting powder. Thus, the cutting powder discharge path 22 is arranged so as to be provided on both sides of the table 21 along the driving direction of the table 21, and the cutting powder is discharged to the cutting powder discharge path 22 by flowing a large amount of cutting fluid. Cutting powder can be efficiently discharged without human intervention.

  Moreover, in this embodiment, since the cutting powder storage 30 was provided under the front floor of the machine tool 1, it is easy for an operator to grasp the volume state of the cutting powder, and the cutting powder storage 30 is not disturbed by normal work. It can be provided. Further, since a mechanical mechanism for lifting the cutting powder upward is unnecessary, a cutting powder collecting system with low cost and high reliability can be provided.

  In the present embodiment, a portal machine tool has been described as an example. However, the present invention is not limited to this, and may be applied to, for example, a cantilever vertical machine or a horizontal machine.

  It is sectional drawing seen from the front direction of the machine tool used for the cutting powder collection | recovery system of embodiment concerning this invention.   It is a side view of the machine tool used for the cutting powder collection | recovery system of embodiment concerning this invention.   It is a schematic diagram which shows the positional relationship of the machine tool with respect to the cutting powder collection | recovery system of embodiment concerning this invention.   It is a block diagram showing the whole cutting dust recovery system of an embodiment concerning the present invention.

Explanation of symbols

1: Machine tool 11: Column 12: Cross rail 13: Spindle drive unit 14: Quill 15: Cutting tool 16: Cross beam 18: Cutting fluid discharge pipe 21: Table 60: Liquid injection device 22: Cutting powder discharge path 30: Cutting Powder storage 31: Cutting powder container 40: Cutting fluid storage tank (liquid tank)
50: Pump 60: Liquid ejecting apparatus

Claims (5)

A machine tool including a table for placing a workpiece, a cutting tool for cutting the workpiece, and a liquid ejecting apparatus that ejects liquid onto the workpiece;
A flow path disposed along the table;
Cutting powder storage provided at one end of the flow path,
A liquid tank for storing the liquid supplied to the liquid ejecting apparatus,
The liquid ejecting apparatus ejects the liquid toward the workpiece to push the cutting powder toward the flow path, and conveys the cutting powder together with the liquid to the cutting powder storage through the flow path. Cutting powder collection system characterized by doing.   The cutting powder collecting system according to claim 1, wherein the cutting powder storage unit includes a filter that separates the cutting powder and the night body, and the liquid separated by the filter is sent to the liquid tank. .   The cutting powder collecting system according to claim 1, further comprising a pump that sends the liquid stored in the liquid tank toward the flow path and increases the flow rate of the flow path. The machine tool is a portal machine tool that drives the table along a predetermined direction,
The cutting flow collecting system according to any one of claims 1 to 3, wherein the flow path is provided on both sides of the table along a driving direction of the table.   The cutting powder collection system according to any one of claims 1 to 4, wherein the cutting powder storage is provided under a front floor of the machine tool.

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