Gear cutting – milling – or planing – Milling – Process
Patent
1996-07-15
1999-09-07
Howell, Daniel W.
Gear cutting, milling, or planing
Milling
Process
408 1R, 408 58, 408 67, 409136, 409137, B23Q 1102, B23Q 1110
Patent
active
059476613
DESCRIPTION:
BRIEF SUMMARY
FIELD OF ART
The present invention relates to a cutting chip removing method and device for a machine tool, which can continuously remove, with an air stream, cutting chips generated during machining workpieces without any inconvenience of damaging workpieces.
BACKGROUND OF THE INVENTION
A machine tool in which the surrounding of a tool is enclosed by a cover and cutting chips generated by said tool during machining workpieces are able to be continuously sucked in and removed by sucking in air in said cover has been already disclosed (Refer to Japanese laid open utility model publication No. Hei-3-117518).
In this machine tool, the forward edge of said cover is brought into contact with the surface of a workpiece during machining, and there are cases where said cover is caught by staged parts on the surface of a workpiece, whereby a workpiece can not be machined while moving said tool along the surface thereof, and the surface of a workpiece may be damaged by said cover being brought into contact with the surface of a workpiece.
Furthermore, when machining a workpiece while moving a tool (for example, a drill) in the tool axis direction relative to said workpiece, the cutting is made deep, whereby cutting chips generated by the machining end of said tool can not be effectively removed by air sucking.
It is therefore an object of the invention to provide a cutting chip air-stream removing method and device when machining workpieces in a machine tool, which are able to solve the abovementioned shortcomings in a reasonable manner.
DISCLOSURE OF THE INVENTION
In order to achieve the abovementioned object, a first feature of the invention is constructed so that an enclosing member is provided at the circumference of the chucked end of a tool attached to the rotating axis, a cylindrical member which encloses a tool is slidably inserted into said enclosing member at said tool forward edge thereof, said cylindrical member is formed so that an opening secured at the machining end of said tool is made U-shaped toward the center of said tool, and is pressed toward the machining end of said tool by a spring or the like, wherein a suction pipe which sucks in air from the inside of the cylindrical member is connected to said enclosing member.
According to the feature of the invention, since said suction pipe sucks in air from inside said enclosing member and cylindrical member, the inside of said enclosing member and the like is caused to enter a negative pressure state. Due to this negative pressure and atmospheric air acting on the outside of the forward edge of said cylindrical member, said cylindrical member is sucked in and is caused to move upward along said rotating axis against a force of the spring, and at a specified position, said cylindrical member is balanced with the spring force. When a workpiece is machined, the atmospheric air flow into said enclosing member is limited since the forward edge of said cylindrical member is brought into contact with the surface of said workpiece, whereby the negative pressure inside the enclosing member is made greater. Therefore, since a pressing force due to the atmospheric air acting on the outside of the forward edge of said cylindrical member overcomes the spring force, said enclosing member is further drawn upward along the rotating axis, whereby the limitation of the atmospheric air flow into said enclosing member is broken, and said cylindrical member is retained at a new position with the suction force thereof balanced with the spring force. As the cutting depth of a tool is gradually deepened during machining, the forward edge of said cylindrical member is caused to gradually approach the surface of a workpiece in line with deepening of the cutting. Resultantly, said cylindrical member is caused to move upward along the rotating axis as described above so that said cylindrical member is located at a still new position relative to this approach with the suction force balanced with the spring force. Therefore, the cylindrical member is always maintained at a
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Horkos Corp.
Howell Daniel W.
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