Method for controlling a machine tool and apparatus therefor

Details Method for controlling a machine tool and apparatus therefor Method for controlling a machine tool and apparatus therefor

2009-03-25

2011-12-13

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

Position or displacement

C356S615000, C356S601000, C356S138000, C356S418000, C356S237200

Reexamination Certificate

active

08077327

ABSTRACT:
Relative movement in X, Y and Z axis directions is made between a main spindle and a table6for application in a machine tool in which a work is machined. An emitting element12for irradiating laser beam11and a photosensitive element13are disposed on the table6. A measuring tool8with its top end being shaped as a cone form is attached to the main spindle4. The laser beam11is interrupted with the cone form portion15of the measuring tool8through relative movement between the table6and measuring tool8before and after machining a work. Detection signal of interruption is generated at the moment of interruption, position is detected, operation processing is performed so that difference in X, Y and Z axes before and after machining is obtained along with values for correction. Positional coordinate values for three axis directions are detected simultaneously with a measuring device of a simple constitution by use of laser beam and values for correction such as of thermal displacement is obtained by operation processing of displacement values.

REFERENCES:
patent: 4808000 (1989-02-01), Pasciak
patent: 6072583 (2000-06-01), Kellner
patent: 6496273 (2002-12-01), Stimpson et al.
patent: 6775013 (2004-08-01), Wang
patent: 7120288 (2006-10-01), Fujishima
patent: 7355727 (2008-04-01), Turrini

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