Patent ID: 6277004
Filing Date: 2001-08-21
Classification: B23Q,G05B

Abstract:
A recess machining apparatus for manufacturing a work with recesses disposed in a circumferential direction at a predetermined interval, said recess machining apparatus comprising:a holding and rotating member by which a work can be held at any angular positions and said work can be rotated around its axis;a machining unit having a tool by which said recesses of said work can be finally machined;three dimensional drive unit for driving relatively said machining unit and said holding and rotating member in a X direction horizontally extended along the axis of said work, a Y direction horizontally extended along a line perpendicular to said X direction and a Z direction vertically extended along a line perpendicular to said X and Y directions;table sensor detecting an angular position of said work about the axis of said work;position sensors respectively detecting positions of the machining unit in the X, Y and Z directions;a contact sensor provided with said tool while keeping a predetermined positional relationship between said contact sensor and said tool; anda phase controller for controlling and adjusting a positional relationship between said tool and an angular position of each of said recesses, whereinsaid phase controller brings said contact sensor to an initial position,said phase controller rotates said work in a first direction by a first rotational angular distance and then stores a first data,said phase controller reverse-rotates said work in a second direction opposite to said first direction by a second rotational angular distance and then stores a second data,said phase controller calculates a rotation angle on the basis of said first and second data, andsaid phase controller adjusts said recesses into a predetermined angular position by rotating said work around said axis in accordance with said rotation angle thus calculated.