JP2008168411A - Hole chip removing tool and chip removing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly discharge cutting chips from each of holes by one time cleaning even when there are a plurality of holes adjacent to each other. <P>SOLUTION: A piston 12 is mounted on the fore end side of a tool main body 10 free to go in and out by a prescribed quantity, and a cover 17 having an escape groove 19 to cover an inlet of the hole 16 which is a cleaning object and to open it toward the prescribed direction is mounted on a fore end of this piston 12. The bottom end side of the tool main body 10 is mounted on a main spindle S of a machine tool working the hole 16 free to connect to and disconnect from it, a through hole 12 to supply pressurized air through a passage 20 of the main spindle S is provided on the bottom end side of the tool main body 10, and a nozzle 22 is mounted on this through hole 21. The nozzle 22 is formed so that the fore end side is free to intrude the inside of the hole 16 which is the cleaning object and discharges the chips 24 in the hole 16 outside from the escape groove 19 by the nozzle 22 by covering the inlet of the hole 16 by the cover 17. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hole chip cleaning tool and a chip cleaning method for discharging chips and the like in a hole before and after a tapping process for cutting a screw into a hole opened in a workpiece, and in particular, a hole is formed. The present invention relates to a chip cleaning tool and a chip cleaning method for a hole suitable for chip cleaning when there are a plurality of adjacent ones.

Conventionally, in machine tools, in order to eliminate chips generated during processing with a cutting tool such as a tool, as shown in Patent Document 1, an oil hole for ejecting pressure oil is provided in the cutting tool, or Patent Document 2 As shown in Fig. 4, oil mist is ejected to the cutting part by the cutting tool.
Japanese Patent Laid-Open No. 6-297 211 JP 2005-14117 A

  By the way, in the tapping process of cutting a screw into a hole opened in a workpiece, conventionally, in order to discharge the chips remaining in the holes, the chips are manually removed from the holes by air using a nozzle-shaped cleaning jig. It was discharged.

  However, in this method, when there are a plurality of holes and they are close to each other, the chips once again enter the holes that have been cleaned, so it is necessary to circulate the cleaning multiple times, which requires a lot of man-hours. There was a problem.

  The present invention relates to a chip cleaning tool for a hole and a chip capable of reducing man-hours by reliably discharging chips from each hole even if there are a plurality of adjacent holes. It aims to provide a cleaning method.

  In order to achieve the above object, a hole chip cleaning tool according to the present invention comprises a tool body having a cylinder hole at least on the tip end side, a piston fitted into the cylinder hole over a predetermined length, and a piston. An urging means that presses toward the tip end side of the cylinder hole, a cover that is attached to the tip end of the piston, covers the inlet of the hole to be cleaned, and has an escape groove that opens in a predetermined direction, and the original end side is The nozzle body is fixedly attached to the tool body and is supplied with pressurized air, and the tip end side includes a nozzle formed to be able to enter and exit the hole to be cleaned through the piston. It is characterized by.

  In addition, the said tool main body may be formed so that attachment or detachment is possible directly or indirectly to the main axis | shaft which attaches the tool of the machine tool which processes the hole which is the said cleaning object.

  Further, in the hole chip cleaning method according to the present invention for achieving the above object, the above-mentioned tool body can be directly or indirectly attached to or detached from a spindle for attaching a tool of a machine tool for machining the hole to be cleaned. The chip cleaning tool is the object to be cleaned by automatically controlling the three-dimensional position and the rotation angle position of the spindle by the numerical control function of the machine tool using the chip cleaning tool in the hole formed in In addition to positioning with respect to the hole, the nozzle is advanced into the hole to discharge chips in the hole in a predetermined direction.

  According to the present invention, the chips discharged from the hole to be cleaned by the pressurized air ejected from the tip of the nozzle are restricted in the discharge direction by the cover, and only from the portion of the cover relief groove to the outside. Therefore, it is possible to prevent chips from entering the hole once cleaned by directing the escape groove in a predetermined direction, even if there are multiple holes adjacent to each other. With this cleaning, chips can be surely discharged from each hole and the man-hour can be reduced.

  Further, the chip cleaning tool is formed so as to be detachable directly or indirectly on a spindle to which a tool of a machine tool for machining the hole to be cleaned is attached, and the three-dimensional position and the rotation angle position of the spindle are determined. If the chip cleaning tool is automatically moved and positioned by the numerical control function, it is possible to clean the chips in the hole easily and reliably.

  An embodiment of the present invention will be described below with reference to FIGS. 1 and 2, reference numeral 10 denotes a tool body. As shown in FIG. 2, the tool body 10 has a cylinder hole 11 having an open end on the lower end side in FIG. 11, a piston 12 is fitted in and out freely. A guide groove 13 extending in the longitudinal direction is provided on the outer peripheral surface of the piston 12. On the other hand, a guide pin 14 that fits into the guide groove 13 is provided on the tool body 10, and the piston 12 is connected to the cylinder hole 11 of the tool body 10. The piston 12 is elastically pressed toward the tip end side of the cylinder hole 11 by a compression coil spring 15 as an urging means provided in the cylinder hole 11. It has become.

  As shown in FIG. 3, a cover 17 is attached to the tip of the piston 12 so as to cover the entrance of the hole 16 to be cleaned provided on the workpiece W. An elastic material such as rubber or plastic is attached to the lower surface of the cover 17. The flexible material 18 which consists of material and comprises a part of cover 17 and makes this cover 17 closely_contact | adhere to the workpiece | work W is provided. The cover 17 is provided with a relief groove 19 that opens the entrance of the hole 16 in a predetermined direction (left direction in FIG. 3).

  As shown in FIG. 3, the base end side of the tool body 10 is formed so as to be directly or indirectly attached to the spindle S of the machine tool via a holder or the like. This machine tool is a machine tool that processes the hole 16 to be cleaned (including tapping and pilot hole processing), and controls the position and movement of the spindle S in three dimensions by numerical control. 16 processes are performed.

  The tool body 10 is configured to be automatically attached to and detached from the spindle S of the machine tool, preferably by an automatic tool changer, and the tool body 10 is provided on the former end side of the tool body 10 via a passage 20 in the spindle S. A through hole 21 to which pressurized air is supplied from an air pressure source (not shown) is provided, and a nozzle 22 is fitted and fixed to the through hole 21 in an airtight manner. The front end side of the nozzle 22 penetrates the piston 12 along the axis of the piston 12 so as to freely enter and exit, and is formed so as to be able to enter the hole 16 to be cleaned as shown in FIG. Reference numeral 23 denotes a vent hole for communicating the space of the portion having the compression coil spring 15 in the cylinder hole 11 to the outside.

  Next, the operation of this tool will be described. Preferably, the tool tool 10 is attached to the spindle S of the machine tool as shown in FIG. 3 by the automatic tool changer as described above. This machine tool is a machine tool that performs processing of the hole 16 to be cleaned, that is, tap processing and pilot hole processing, and has data for numerical control for processing the hole 16, and based on the data. By controlling the position and movement of the spindle S in three dimensions using the numerical control data for cleaning created in this way, the tip of the nozzle 22 is positioned above the hole 16 to be cleaned and the spindle S is rotated. The angular position is set to a predetermined position, and the direction of the relief groove 19 of the cover 17 is directed to the predetermined direction.

  The positioning of the nozzle 22 with respect to the hole 16 is such that the nozzle 22 escapes with respect to the center of the hole 16 and is shifted to the opposite side to the opening direction of the groove 19 in order to facilitate discharge of chips described later. You may make it open widely.

  Next, the spindle S is lowered at a predetermined speed, and the cover 17 is pressed against the surface of the workpiece W to cover the entrance of the hole 16. After the inlet of the hole 16 is covered by the cover 17, the main shaft S is fed at a predetermined speed or step feed to the bottom of the hole 16 while supplying pressurized air from an air pressure source (not shown) to the nozzle 22 through the passage 20 and the through hole 21. Lower to near.

  The pressurized air supplied to the nozzle 22 is ejected from the tip of the nozzle 22 into the hole 16, and the chips 24 in the hole 16 are released and discharged from the groove 19 to the outside. Since the discharge direction of the chips 24 discharged from the holes 16 is determined by the escape grooves 19, the holes 16 are cut into the holes 16 once cleaned by appropriately determining the order of cleaning with respect to the holes 16 and the direction of the release grooves 19. The powder 24 can be prevented from entering.

  In the above-described embodiment, the example in which the tool body 10 is attached to the spindle S to which the tool of the machine tool for machining the hole 16 to be cleaned is attached and automatically cleaned is shown, but the present invention is limited to this. However, the tool body 10 may be manually operated, and the shape of the tool body 10 and the like can be variously modified.

  The present invention is not limited to the discharge of chips from the hole before and after the tapping process, and can be widely applied as a tool for cleaning the hole.

1 is a front view showing an embodiment of the present invention. The longitudinal cross-sectional view by the AA line of FIG. The longitudinal cross-sectional view which shows an example of the use condition of the tool shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Tool main body 11 Cylinder hole 12 Piston 13 Guide groove 14 Guide pin 15 Compression coil-like spring 16 Hole 17 Cover 18 Flexible material 19 Escape groove 20 Passage 21 Through-hole 22 Nozzle 23 Vent hole 24 Chip S S Spindle W Workpiece.

Claims (3)

A tool body having a cylinder hole at least on the tip side;
A piston fitted into the cylinder hole so as to freely enter and exit over a predetermined length;
Urging means for pressing the piston toward the tip side of the cylinder hole;
A cover that is attached to the tip of the piston and covers an inlet of a hole to be cleaned and has an escape groove that opens in a predetermined direction;
The former end side is fixedly attached to the tool body and receives supply of pressurized air, and the tip end side penetrates the piston so as to freely enter and exit, and a nozzle formed to be able to enter the hole to be cleaned,
A hole cleaning tool comprising:   2. The chip cleaning of a hole according to claim 1, wherein the tool body is formed to be detachable directly or indirectly to a main shaft to which a tool of a machine tool for machining the hole to be cleaned is attached. tool.   By automatically controlling the three-dimensional position and the rotation angle position of the spindle by the numerical control function of the machine tool, the chip cleaning tool is positioned with respect to the hole to be cleaned and the nozzle is placed in the hole. 3. The method for cleaning a chip of a hole by using a chip cleaning tool for a hole according to claim 2, wherein the chip is discharged into a predetermined direction by discharging the chip into the hole.

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