JP2009202284A - Chip sucking and conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chip sucking and conveying device which has a short conveying passage for sucking and discharging chips, is excellent in sucking and discharging force, and proof against clogging with chips. <P>SOLUTION: The chip sucking and conveying device is formed of: a sub-filter portion 300 for sucking chips 400 from a tool 10 by a suction device 310, and temporarily storing the chips therein; and a main filter portion 500 for pressurizing and discharging the chips 400 collected in the sub-filter portion 300, by a pressurizing device. To carry out suction and conveyance of the chips, the chips 400 generated by the tool 10 are collected in the sub-filter portion 300 by suction, and the collected chips 400 are conveyed to the main filter portion 500 by pressurization. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a chip suction / conveying device, and in particular, a sub-filter part is provided in a movable part of a machine tool to suck chips with a negative pressure, and chip suction / conveyance is carried to a main filter part with compressed air. Relates to the device.

  In machine tools such as end mills and drills, disposal of chips generated during cutting is a problem. The cost increases due to a removal process such as cleaning of chips adhering to the product after the cutting process, and the quality is reduced due to scratches or the like attached to the product by the chips. In order to cope with such a problem, for example, there is a case in which a small hole penetrating in the axial direction of the end mill is additionally processed and processing is performed while suctioning and discharging chips from the small hole.

In addition, there has been proposed a machining device that uses a drill groove such as a drill to suck and discharge chips and process them (for example, Patent Document 1). In this machine tool, a cylindrical base cylinder having a hollow portion is attached to a main body of a drilling machine, and chips generated by processing are discharged to a vacuum tank through a rubber hose through a gap between the base cylinder and a drill groove.
JP 11-138319 A

  However, in the conventional method of processing while suctioning and discharging chips, chips are sucked and discharged by negative pressure, so there is a limit to shortening the suction path to the suction device, and sufficient suction and discharge force Could not get. Further, according to the machine device described in Patent Document 1, chips are sucked and discharged together with compressed air in addition to suction and discharge by negative pressure. However, since the filter unit for collecting chips is in an external suction device, the chips As a result, the suction / discharge route becomes longer, and the suction / discharge force is not excellent. Moreover, since the conveyance path | route for suction discharge is long, there also existed a problem that chip clogging was easy to generate | occur | produce.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a chip suction / conveying device that has a short conveying path for sucking and discharging chips and having excellent suction and discharging force and is less likely to cause chip clogging.

  [1] In order to achieve the above object, according to the present invention, a sub-filter unit for sucking chips by a suction device and temporarily storing chips when a tool mounted on a machine tool is moved by a movable unit and processed. And a main filter part that pressurizes and discharges the chips collected by the sub-filter part by a pressurizing device, and the sub-filter part is mounted on a movable part of a machine tool. A chip suction / conveyance device is provided.

  [2] The chip suction conveyance device according to [1], wherein the pressurization is performed by compressed air.

  [3] Further, a valve for controlling the chip conveyance path is provided between each of the sub-filter unit and the tool, the suction device, the pressurizing device, and the main filter unit. The chip suction / conveyance device described in [1] above may be used.

  ADVANTAGE OF THE INVENTION According to this invention, the conveyance path | route for sucking and discharging a chip | tip is short, it is excellent in the suction discharge force, and the chip | tip suction conveyance apparatus which does not generate | occur | produce chip clogging easily can be provided.

(First embodiment of the present invention)
FIG. 1 is an overall perspective view showing the overall configuration of the chip suction / conveyance device according to the first embodiment of the present invention. FIG. 2 is a block diagram showing a connection configuration of each component in the chip suction / conveyance device according to the first embodiment of the present invention. FIG. 3 is a partial cross-sectional view showing a state in which a cutting tool (end mill) is mounted on the chuck portion of the machine tool. FIG. 4 is a partial cross-sectional view showing a modification of FIG.

  As shown in FIG. 1, the chip suction / conveyance device 1 according to the first embodiment of the present invention is applied to, for example, a milling machine 100 that is moved and processed by a movable portion 100 a while rotating a tool. In the milling machine 100, the workpiece (workpiece) 200 is controlled by controlling the position of the movable portion 100a with the XYZ coordinates of the tip portion 10a while sucking and removing the chips being cut through the rotating tool 10 or the hollow main shaft 110. Cutting.

  The suction conveyance device 1 pressurizes the chip 400 from the tool 10 by the suction device 310 and temporarily accumulates the chips 400 collected by the subfilter unit 300 and pressurizes the chips 400 collected by the subfilter unit 300. And a main filter unit 500 for discharging. Here, the sub-filter unit 300 is mounted on the movable unit 100a provided with the tool 10 of the milling machine 100, while the main filter unit 500 is located in a region other than the movable unit 100a of the milling machine 100 or a region other than the milling machine 100. It arrange | positions and is connected by the conveyance tube 330 mentioned later, respectively. Further, the suction device 310 and the compressed air supply device 510 as a pressurizing device are arranged in a region other than the movable portion 100 a of the milling machine 100 or a region other than the milling machine 100.

  The sub-filter unit 300 is connected to the suction device 310 via the valve A320 via the transport tube 330, and is configured to be sucked from the suction device 310 with a negative pressure. The suction device 310 generates a negative pressure for suction, and sucks at a suction force of 1 atm or less, for example, 0.05 MPa (about 0.5 atm). The above-described valve A320 that opens and closes by a predetermined control signal to perform suction control is provided between the sub-filter unit 300 and the suction device 310, and a filter (not shown) for preventing the chips 400 from passing therethrough. Material is provided.

  In addition, the sub filter unit 300 is connected to the hollow main shaft 110 by a transport tube 330 via a valve B321. Since the hollow main shaft 110 can be rotated by a rotation drive unit (not shown), the valve B321 and the hollow main shaft 110 are connected by a rotary union 340 that can rotate and can be connected in an airtight state. The hollow main shaft 110 is rotatably supported by a main shaft bearing 350, and the tool 10 is mounted on the tip portion. As will be described later, since the gap 10d through which the chip 400 can pass is formed in the tool 10, the gap 10d of the tool 10, the gap 112 of the hollow main shaft 110, from the processing point to the sub filter unit 300, The rotary union 340, the transfer tube 330, and the valve B321 are connected in an airtight state. The valve B321 can be opened and closed by a predetermined control signal. In addition, it may replace with the rotary union 340 and may be connected via sealing members, such as a labyrinth seal which has a clearance gap.

  Further, the sub filter unit 300 is connected to the compressed air supply device 510 via the valve C322 by a conveying tube 330, and applies a predetermined pressure, for example, 0.5 MPa (about 5 atm) to the sub filter unit 300 by the compressed air. The pressure for pressurizing the sub-filter unit 300 with the compressed air can be arbitrarily set. The valve C322 can be opened and closed by a predetermined control signal.

  In addition, the sub filter unit 300 is connected to the main filter unit 500 via the conveyance tube 330 via the valve D323. The valve D323 can be opened and closed by a predetermined control signal.

  The main filter unit 500 has a capacity necessary to accommodate the chips 400 conveyed from the sub-filter unit 300, collects the chips 400 conveyed by the compressed air from the compressed air supply device 510, and air A filter material (not shown) for discharging the air from the main filter unit 500 to the outside air is provided.

  The tool 10 is a substantially cylindrical tool that has a cutting edge and performs processing by rotating, and examples thereof include an end mill or a drill. The tool 10 can be used by processing a commercially available end mill or drill. In the case of an end mill, the tool 10 has cutting edges at the tip 10a and the outer periphery 10b, the tool groove 10c is spirally formed on the outer periphery 10b as a spiral groove, and the tip is formed as a hollow portion 10d at the center. A through hole is made up to the portion 10a, and the chips 400 can be sucked.

  FIG. 4 shows a modification of the tool 10 shown in FIG. 3, in which a side hole 10e leading from the hollow portion 10d to the tool groove 10c is opened, and the chips 400 can be sucked from the side hole 10e through the hollow portion 10d. is there.

  The tool 10 configured as described above is used by being mounted on a milling machine 100, for example, as shown in FIG. The shank portion 10f of the tool 10 is mounted and fixed on the chuck portion 101 of the milling machine 100, and the tool 10 rotates at a predetermined rotation speed by the rotation of the spindle of the milling machine 100. As shown in FIG. 3, a gap 10 d penetrating from the tip 10 a of the tool 10 is formed and connected to the suction device 310 through the gap 112 of the hollow spindle 110 of the milling machine 100, and is generated along with the cutting process. The chip 400 can be sucked and removed.

(Suction conveyance operation of the first embodiment)
In the first embodiment, the operation of sucking and conveying chips generated when machining while rotating the tool 10 mounted on the milling machine 100 by the movable portion 100a will be described below. The transfer operation will be described separately.

(Chip suction operation)
The chip suction operation is an operation of collecting the chip 400 generated by the tool 10 in the sub-filter unit 300 by suction.

  First, during the chip suction operation, the valve A320 and the valve B321 are opened, and the valve C322 and the valve D323 are closed. In this state, the suction device 310 is operated at a predetermined pressure (negative pressure), and for example, suction is performed at 0.05 MPa (about 0.5 atm). The chips 400 generated at the processing point are collected by the sub-filter unit 300 through the gap 10d of the tool 10, the gap 112 of the hollow main shaft 110, the rotary union 340, the transfer tube 330, and the valve B321. The air that sucks and conveys the chips 400 reaches the suction device 310 from the sub-filter unit 300 through the valve B321 and the conveying tube 330, and is discharged to the outside air. As described above, since the filter material (not shown) is provided in the sub-filter unit 300, the chips 400 are collected in the sub-filter unit 300.

(Chip transport operation)
When a predetermined amount of chips 400 are collected in the sub-filter unit 300 by the chip suction operation, the process proceeds to the next chip transport operation. The chip conveying operation is an operation of conveying the chip 400 in the sub-filter unit 300 to the main filter unit 500 by pressurization.

  First, during the chip transfer operation, the valve A320 and the valve B321 are closed, and the valve C322 and the valve D323 are opened. In this state, the compressed air supply device 510 is operated at a predetermined pressure, and for example, pressure is applied to the sub-filter unit 300 side at 0.5 MPa (about 5 atm). The chips 400 collected in the sub filter unit 300 are conveyed to the main filter unit 500 through the valve D323 and the conveyance tube 330. As described above, since the filter material (not shown) is provided in the main filter unit 500, the chips 400 are accumulated in the main filter unit 500, but air is discharged from the main filter unit 500 to the outside air.

The first embodiment of the present invention has the following effects.
(1) Since the sub-filter unit 300 is mounted on the movable unit 100a of the machine tool (milling machine 100), the processing point, that is, the conveyance path from the tool 10 to the sub-filter unit 300 can be set short. Thereby, even when the chips are sucked with negative pressure, the suction efficiency is improved and the occurrence of chip clogging is reduced.
(2) Since the chips 400 collected by the sub-filter unit 300 are conveyed to the main filter unit 500, the sub-filter unit 300 may have a small volume, and the movable unit 100a can be easily reduced in size and weight. Has an effect.
(3) Since the pressure loss is large in the first embodiment in which the chips 400 are conveyed through the gap 10d of the tool 10, this embodiment in which the conveyance path from the tool 10 to the sub filter unit 300 can be shortened is particularly advantageous. is there.

(Second embodiment of the present invention)
FIG. 5 is a block diagram showing a connection configuration of each component in the chip suction / conveyance device according to the second embodiment of the present invention. The suction conveyance device 1 according to the first embodiment is configured to suck the chips 400 into the sub-filter unit 300 through the gap 10d of the tool 10 and the gap 112 of the hollow main shaft 110. The suction conveyance device 1 according to the embodiment includes a suction nozzle 360 in the vicinity of the tool 10 and sucks the sub-filter unit 300 through a conveyance tube 330 connected thereto.

  As shown in FIG. 5, the suction nozzle 360 is provided in the vicinity of the tool 10 and is connected to the sub filter unit 300 through the transport tube 330 and the valve B321. Therefore, in the present embodiment, the tool 10 does not need the gap portion 10d, and similarly, the main shaft that rotationally drives the tool 10 does not need to have the gap portion 112. Since the other configuration and the suction / conveying operation of the chips 400 are the same as those in the first embodiment, description thereof will be omitted.

  According to the second embodiment of the present invention, the tool 10 does not need the gap portion 10d, and similarly, the main shaft for rotationally driving the tool 10 does not need to have the gap portion 112. It is easy to attach the suction conveyance device 1 according to the second embodiment to the machine.

FIG. 1 is an overall perspective view showing the overall configuration of the chip suction / conveyance device according to the first embodiment of the present invention. FIG. 2 is a block diagram showing a connection configuration of each component in the chip suction / conveyance device according to the first embodiment of the present invention. FIG. 3 is a partial cross-sectional view showing a state in which a cutting tool (end mill) is mounted on the chuck portion of the machine tool. FIG. 4 is a partial cross-sectional view showing a modification of FIG. FIG. 5 is a block diagram showing a connection configuration of each component in the chip suction / conveyance device according to the second embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Suction conveyance apparatus 10 Tool 10a Tip part 10b Outer peripheral part 10c Tool groove 10d Gap part 10e Side hole 10f Shank part 100 Milling machine 101 Chuck part 110 Hollow main shaft 112 Cavity part 200 Work 300 Sub filter part 310 Suction apparatus 320-323 Valve A D
330 Conveying tube 340 Rotary union 350 Main shaft bearing 360 Suction nozzle 400 Chip 500 Main filter unit 510 Compressed air supply device

Claims (3)

A sub-filter unit for temporarily collecting the chips when moving the tool mounted on the machine tool by moving the movable unit by suction with a suction device;
A main filter part that pressurizes and discharges the chips collected in the sub-filter part by a pressurizing device,
The chip suction / conveyance device, wherein the sub-filter unit is mounted on a movable part of a machine tool.   The chip suction / conveyance device according to claim 1, wherein the pressurization is performed by compressed air.   The valve for controlling the conveyance path | route of the said chip is provided between each of the said sub filter part and the said tool, the said suction device, the said pressurization apparatus, and the said main filter part. The chip | tip suction conveyance apparatus of description.

Images