JP5940884B2 - Chip removal method and cutting tool - Google Patents

Description

  The present invention is a method for removing chips generated when a cutting tool is attached to a die holder in a punch press such as a turret punch press and the lower surface of a plate-like workpiece is cut (ground). In particular, the present invention relates to a chip removal method and a cutting tool that can effectively remove chips without scattering to the surroundings.

  Conventionally, when a plate-shaped workpiece is bent at, for example, a right angle, a V-shaped groove is sometimes processed at a bending position of the workpiece. The V groove may be processed using a shaper or a dedicated groove processing machine. In this case, V-groove machining is performed after punching necessary for the workpiece. For example, there is an inconvenience of conveying and positioning the workpiece from the punch press to the groove machining machine.

  Therefore, a punch press has been proposed in which an upper turret in a turret punch press is provided with a cutting tool provided with a cutting tool for cutting a V-groove so as to be movable up and down (see Patent Document 1).

JP-A-5-42333

  In the configuration described in Patent Document 1, since the upper turret in the turret punch press is provided with a cutting tool provided with a cutting tool for processing a V groove, punching is performed on a plate-shaped workpiece. Later, it is possible to continuously perform V-groove processing, and to improve the efficiency of V-groove processing. However, there is a problem that the chips after V-grooving are scattered on the upper surface of the workpiece.

The present invention has been made in view of the above-described problems, and is a method for discharging chips generated during cutting of the lower surface of a workpiece by a cutting tool provided in a die holder in a punch press, in the cutting tool. The tool housing is provided with a rotary tool so as to be rotatable, an air motor for rotating the rotary tool is provided in the tool housing, and a communication hole communicated with a chip dropping space in which chips fall when machining the lower surface of the workpiece In order to generate a suction action on the die holder, the air motor is interposed between the inner peripheral surface of the die mounting hole in the die holder and the outer peripheral surface of the tool housing, or between the cover outer cylinder surrounding and surrounding the tool housing. the exhaust air by applying suction to the communication hole by the downward direction f ejected from, to aspirate the chips from the machining position It is an feature.

Further, it is a cutting tool, and the cutting tool includes a mounting portion that can be attached to and detached from a die mounting hole provided in a die holder in a punch press, and the mounting portion includes a tool housing that is long in the vertical direction. In this tool housing, a rotary tool for cutting on the lower surface of the workpiece is rotatably provided, and an air motor for rotating the rotary tool is provided, and chips generated by cutting the rotary tool are removed from the machining position. in order to, in order to exert a suction force to the communicating hole communicating with the chips falling space which chips to fall between the outer peripheral surface of the inner circumferential surface of the die mounting hole and the tool housing, or the tool housing surrounding the air ejection holes for ejecting downward exhaust air of the air motor to between the inner peripheral surface of the cover outer cylinder having in and said tool housing said tool Haujin It is characterized in that it is in that configuration that includes the.

  Further, in the cutting tool, in order to generate a swirling flow in the jet air from the air jet hole, the air jet hole is inclined in a circumferential direction of the tool housing with respect to a radial direction. It is what.

  Further, the cutting tool is characterized in that a chip scattering preventing means is provided at an upper part of the tool housing so as to surround the rotary tool.

  According to the present invention, since the lower surface of the workpiece is cut, the chips generated during the cutting process immediately drop from the lower surface of the workpiece. And since a chip is removed using the exhaust air from the air motor with which the cutting tool was equipped, the removal of a chip can be performed easily.

It is composition explanatory drawing which shows the mounting state of the cutting tool which concerns on 1st Embodiment with respect to the lower mold | type holder in a punch press. It is composition explanatory drawing which shows the mounting state of the cutting tool which concerns on 2nd Embodiment with respect to the lower mold | type holder in a punch press.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. A punch press (not shown) such as a turret punch press for detachably mounting a cutting tool 1 according to an embodiment of the present invention is well known. Since it is a structure, the detailed description about a punch press is abbreviate | omitted.

  Referring to FIG. 1, a cutting tool 1 according to an embodiment of the present invention is detachably attached to a die attachment hole 5 provided in a die holder 3 in a punch press (the whole configuration is not shown). The die holder 3 supports a die (not shown) as a lower mold, and when the punch press is a turret punch press, the lower turret corresponds to the die holder.

  A holder block 9 having a holder hole 7 communicating with the die mounting hole 5 is integrally attached to the upper surface of the die holder 3. Therefore, the holder block 9 can be regarded as a part of the die holder 3, and the holder hole 7 can be regarded as a part of the holder mounting hole 5. The cutting tool 1 includes a large-diameter mounting portion 11 that can be attached to and detached from the holder hole (die mounting hole) 7. A cylindrical tool housing 13 that is long in the vertical direction is provided at the bottom of the mounting portion 11. It is provided as a unit.

  An air motor 15 is housed in the tool housing 13, and a collet chuck 19 that is rotatably mounted on the upper portion of the tool housing 13 is provided on the upper end side of the rotating shaft 17 in the air motor 15. Yes. A cutting rotary tool (grinding tool) 23 as a rotary tool for cutting (grinding) the V-groove 21 and the like on the lower surface of the plate-like workpiece W can be attached to and removed from the collet chuck 19. Is provided. Further, an annular work support member 25 surrounding the cutting rotary tool 23 is provided on the upper surface of the tool housing 13.

  The workpiece support member 25 movably supports a workpiece W whose lower surface is cut by the cutting rotary tool 23, and is detachably fixed to the upper surface of the tool housing 13. Therefore, the workpiece support member 25 can be regarded as a part of the tool housing 13. On the upper surface of the workpiece support member 25, chip scattering preventing means 27 surrounding the cutting rotary tool 23 is provided. The chip scattering preventing means 27 is constituted by, for example, an annular brush or the like, and also has a function of supporting the workpiece W so as to be movable.

  In order to supply compressed air to the air motor 15, the tool housing 13 is provided with a compressed air supply path 29 that can be connected to an air supply pipe (not shown) and communicated with the air motor 15. The tool housing 13 is provided with an air ejection hole 31 for ejecting the exhaust air from the air motor 15 to the outside. In the configuration shown in FIG. 1, the air ejection hole 31 is formed so as to be directed downward in an annular gap 33 between the inner peripheral surface of the die mounting hole 5 and the outer peripheral surface of the tool housing 13. is there.

  Accordingly, when compressed air is ejected downward from the air ejection hole 31 to the annular gap 33, the upper air in the gap 33 tends to be sucked downward. Therefore, the upper part of the gap 33 is a chip fall space surrounded by the chip scattering prevention means 27 through a communication hole 11H formed in the mounting portion 11 and a communication hole 25H formed in the work support member 25. 35 is communicated. Therefore, the chips generated by the cutting of the cutting rotary tool 23 can be sucked and removed to the annular gap 33.

  In the configuration as described above, compressed air is supplied to the air motor 15 to drive the cutting rotary tool 23 to rotate. Then, the lower surface of the workpiece W is supported by the chip scattering preventing means 27, and the lower surface of the workpiece W is held in contact with the cutting rotary tool 23, and the workpiece W is relatively moved in the appropriate direction with respect to the cutting rotary tool 23. Accordingly, the V groove or the like is cut on the lower surface of the workpiece W. In addition, as a configuration in which the lower surface of the workpiece W is brought into contact with the cutting rotary tool 23, a configuration in which the workpiece W is movably down-pressed by an upper die or the like provided on an upper die holder (upper turret) in a punch press is provided, It is possible to have a desired configuration such as a configuration in which the collet chuck 19 is slightly raised.

  The chips generated by cutting with the cutting rotary tool 23 tend to scatter around, but the chips are prevented from being scattered by the chip scattering preventing means 27 and fall into the chip dropping prevention space 35. . At this time, the exhaust air from the air motor 15 has a suction action on the upper portion of the annular gap 33 due to the action of the air jetted downward from the air jet holes 31 formed in the tool housing 13. Therefore, the chips in the chip dropping space 35 are sucked and removed to the gap 33.

  By the way, the present invention is not limited to the embodiment described above, and can be implemented in other forms by making appropriate changes. For example, in order to generate a swirling flow in the annular gap 33, the air ejection holes 31 can be provided in a downward direction and inclined in the circumferential direction with respect to the radial direction. According to this configuration, a downward swirling flow is generated in the gap 33, and the suction and removal of chips from the chip dropping space 35 can be performed more effectively.

  Further, exhaust air is jetted from the air motor 15 to a machining position by the cutting rotary tool 23, and the chips are blown off in the direction of the communication hole 25H of the work support member 25 to remove the chips from the machining position. It is also possible to adopt a configuration. Further, as described above, a part of the exhaust air from the air motor 15 is ejected from the air ejection hole 31 to suck the chips in the chip dropping space 35 and to remove a part of the exhaust air. It is also possible to eject the portion into the chip dropping space 35 and blow it away in the direction of the communication hole 25H. That is, it is possible to simultaneously operate both the action of blowing the chips in the chip dropping space 35 in the direction of the communication hole 25H and the action of suctioning and removing the communication hole 25H. is there.

  As already understood, cutting is performed on the lower surface of the workpiece W, and chips generated by the cutting are immediately removed from the processing position, so that adhesion of the chips to the lower surface of the workpiece W is prevented. In addition, it can be prevented from being scattered around.

  FIG. 2 shows a cutting tool 1A according to the second embodiment of the present invention. In the constituent elements having the same function as the constituent elements shown in the cutting tool 1 according to the first embodiment described above, FIG. The same reference numerals are assigned and duplicate descriptions are omitted.

  In the cutting tool 1A according to the second embodiment, a cover outer cylinder 37 surrounding the tool housing 13 is provided, and between the inner peripheral surface of the cover outer cylinder 37 and the outer peripheral surface of the tool housing 13 is provided. The exhaust air is ejected downward from the air ejection holes 31 into the formed annular gap 39. Therefore, also in the cutting tool 1A according to the second embodiment, the same effect as that of the cutting tool 1 according to the first embodiment described above is obtained. In the cutting tool 1 </ b> A, the cover outer cylinder 37 is provided to prevent chips from adhering to the inner peripheral surface of the die mounting hole 5.

1,1A Cutting tool (grinding tool)
DESCRIPTION OF SYMBOLS 3 Die holder 5 Die mounting hole 11 Mounting part 13 Tool housing 15 Air motor 19 Collet chuck 23 Cutting rotary tool (rotary tool)
25 Work support member 25H Communication hole 27 Chip scattering prevention means 31 Air ejection hole 33 Annular gap 35 Chip fall space 37 Cover outer cylinder

Claims (4)

A method of discharging chips generated during cutting of a lower surface of a workpiece by a cutting tool provided in a die holder in a punch press, wherein a rotary tool is rotatably provided in a tool housing of the cutting tool, and the rotary tool is provided. An air motor for rotation is provided in the tool housing, and a die mounting hole in the die holder is provided in order to generate a suction action in the communication hole communicating with the chip dropping space where chips fall when the workpiece lower surface is processed . The exhaust air from the air motor is jetted downwardly between the inner peripheral surface and the outer peripheral surface of the tool housing or between a cover outer cylinder surrounding and surrounding the tool housing. A chip removing method, wherein a chip is sucked and removed from the processing position by applying a suction force. A cutting tool comprising a mounting portion that can be attached to and detached from a die mounting hole provided in a die holder in a punch press, and the mounting portion includes a tool housing that is long in the vertical direction. In the housing, a rotary tool for performing cutting on the lower surface of the workpiece is rotatably provided, and an air motor for rotating the rotary tool is provided, and in order to remove chips generated by cutting the rotary tool from the processing position. In order to apply a suction force to the communication hole that communicates with the chip dropping space where chips fall , between the inner peripheral surface of the die mounting hole and the outer peripheral surface of the tool housing, or surrounding the tool housing Bei air ejection holes for ejecting exhaust air of the air motor downward to between the inner peripheral surface of the cover outer cylinder and the tool housing with Te to the tool housing Cutting tool, characterized in that the Configurations.   The cutting tool according to claim 2, wherein the air ejection hole is inclined in a circumferential direction of the tool housing with respect to a radial direction in order to generate a swirling flow in the ejection air from the air ejection hole. A cutting tool characterized by that.   The cutting tool according to claim 2 or 3, further comprising a chip scattering preventing means surrounding the rotary tool at an upper portion of the tool housing.

Images