Processing device and cut-processing method

Patent metadata

Field	Value
Publication number	US-11980985-B2
Application number	US-201916967040-A
Country	US
Kind code	B2
Filing date	Feb 1, 2019
Priority date	Feb 6, 2018
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

A rotation controller controls a rotation mechanism for rotation of a spindle. A movement controller causes, while the spindle is rotating, a feed mechanism to bring a cutting tool into contact with a workpiece to cause the cutting tool to cut the workpiece. The rotation controller controls a spindle rotation speed so as to accelerate or decelerate the rotation of the spindle, and the movement controller brings the cutting tool into contact with the workpiece after the rotation controller starts the rotation of the spindle, and separates the cutting tool from the workpiece while the spindle rotation speed is put under the acceleration control or deceleration control exercised by the rotation controller.

First claim

The invention claimed is:

1. A machining apparatus comprising:
a rotation mechanism configured to rotate a spindle to which a cutting tool or workpiece is attached;
a rotation controller configured to control the rotation mechanism for rotation of the spindle;
a feed mechanism configured to move the cutting tool relative to the workpiece; and
a movement controller configured to control the feed mechanism to bring the cutting tool into contact with the workpiece, while the spindle is rotating, to cause the cutting tool to cut the workpiece, wherein
the rotation controller performing an acceleration control mode under which the rotation of the spindle is kept accelerated or a deceleration control mode under which the rotation of the spindle is kept decelerated, and
the movement controller brings the cutting tool into contact with the workpiece after the rotation controller starts the rotation of the spindle, and separates the cutting tool from the workpiece while a rotation speed of the spindle is put under the acceleration control mode or deceleration control mode performed by the rotation controller.

2. The machining apparatus according to claim 1 , wherein
when the rotation controller has rotated the spindle at least two rotations under the acceleration control mode or the deceleration control mode, the movement controller separates the cutting tool from the workpiece.

3. The machining apparatus according to claim 1 , wherein
the movement controller brings the cutting tool into contact with the workpiece after the rotation controller starts to change the rotation speed of the spindle, and separates the cutting tool from the workpiece before the rotation controller stops changing the rotation speed of the spindle.

4. The machining apparatus according to claim 3 , wherein
the movement controller receives notification of timing at which the rotation controller starts to change the rotation speed of the spindle, and controls the feed mechanism to bring the cutting tool into contact with the workpiece after the timing at which the rotation controller starts to change the rotation speed of the spindle.

5. A cutting method comprising:
a rotation control step of controlling rotation of a spindle to which a cutting tool or workpiece is attached; and
a machining step of bringing, while the spindle is rotating, the cutting tool into contact with the workpiece to cause the cutting tool to cut the workpiece, wherein
the rotation control step includes performing an acceleration control mode under which the rotation of the spindle is kept accelerated or a deceleration control mode under which the rotation of the spindle is kept decelerated, and
the machining step includes bringing the cutting tool into contact with the workpiece after start of the rotation of the spindle, and separating the cutting tool from the workpiece while a rotation speed of the spindle is put under the acceleration control mode or the deceleration control mode.

Assignees

• National Univ Corporation Tokai National Higher Education And Research System
• Denso Daishin Corp
• Denso Corp

Inventors

• HAYASAKA Takehiro
• Shamoto Eiji
• Nam Soohyun

Classifications

• B23Q15/12 Primary

  Adaptive control, i.e. adjusting itself to have a performance which is optimum according to a preassigned criterion · CPC title

• B23Q17/0976

  Detection or control of chatter (B23Q15/12 takes precedence) · CPC title

• G05B19/4163 Primary

  Adaptive control of feed or cutting velocity (without NC B23Q15/12) · CPC title

• G05B2219/49077

  Control of feed and spindle, cutting speed · CPC title

• G05B2219/43006

  Acceleration, deceleration control · CPC title