ASSIST GAS GENERATION APPARATUS FOR LASER PROCESSING MACHINE

摘要

There is provided an assist gas generation apparatus for a laser processing machine that is capable of dross-free cutting by using a nitrogen-rich gas and of reducing the cutting cost. An assist gas supply portion in a laser processing machine includes an air compressor for taking in air and compressing the air to a prescribed pressure, an oxygen separation device having an oxygen separation membrane for separating an oxygen gas from the air compressed by the air compressor and generating a nitrogen-rich gas, and a booster for compressing the nitrogen-rich gas generated by the oxygen separation device. A throttle portion is provided between the air compressor and the oxygen separation device or between the oxygen separation device and the booster.

主权项

1. An assist gas generation apparatus for a laser processing machine that emits a laser beam from a nozzle and injects an assist gas during processing, the assist gas generation apparatus comprising:
an oxygen separation device including an oxygen separation membrane for separating an oxygen gas from compressed air and generating a nitrogen-rich gas; a booster for compressing the nitrogen-rich gas generated by said oxygen separation device; and a throttle portion being provided between said oxygen separation device and said booster.