Laser processing method and laser beam processing machine

Details Laser processing method and laser beam processing machine Laser processing method and laser beam processing machine

2007-09-10

2010-11-30

Heinrich, Samuel M (Department: 3742)

Electric heating

Metal heating

By arc

C219S121690, C438S463000

Reexamination Certificate

active

07842902

ABSTRACT:
A method of carrying out laser processing along processing lines having linear portions and curved portions formed on a workpiece by using a laser beam processing machine comprising a laser beam application means for applying a laser beam to the workpiece held on a chuck table which comprises a condenser for converging a laser beam, having a focal spot changing means for changing the shape of a focal spot between an elliptic spot and a circular spot, comprising the steps of:moving a processing line formed on the workpiece to the application position of a laser beam, activating the focal spot changing means to make an elliptic focal spot and positioning the long axis of the elliptic spot along a linear portion of the processing line when the linear portion of the processing line is located at the application position of the laser beam and activating the focal spot changing means to make a circular focal spot when a curved portion of the processing line is located at the application position of the laser beam.

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