Machine tool

Details Machine tool Machine tool

1997-04-09

1999-03-09

Howell, Daniel W.

Gear cutting, milling, or planing

Milling

Including means to infeed work to cutter

408124, 409154, 409193, 409231, B23C 106, B23C 900, B23Q 15013

Patent

active

058791132

ABSTRACT:
A machine tool comprises a spindle unit for raising a spindle on which a cutting tool is mounted by a magnetic force and supporting the spindle. The spindle unit carries out feedback control so as to maintain the spindle in its target position in the radial direction. A feeder for feeding the cutting tool to a work comprises a servo motor for moving the spindle unit relatively to the work. A feeding controller for controlling a feeding operation of the feeder controls the speed of rotation of the servo motor on the basis of feed speed data stored in a memory. The feed speed data comprises a first feed speed corresponding to the time when the cutting tool cuts through an end surface of the work crossing the direction of feeding and a second feed speed corresponding to the time of normal working and higher than the first feed speed.

REFERENCES:
patent: 5193953 (1993-03-01), Jesinger
patent: 5739607 (1998-04-01), Wood, III
patent: 5772564 (1998-06-01), Taniguchi et al.

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