Pulse spread laser

摘要

A system and method for precision welding using a fiber laser is disclosed in which varying intensity laser pulses are spread across the material junction in a number of high aspect ratio areas. The power density applied along each area is varied to accommodate differences in the material characteristics of each material while allowing for the creation of a more uniform weld pool alloy.

主权项

1. A method of laser welding, comprising:
steering a laser beam in a series of passes across the junction between first and second materials, wherein during each of the passes the laser power is applied across a continuous high aspect ratio area that traverses the junction, wherein the high aspect ratio area for each pass comprises a first elongated area on the first material and a second elongated area on the second material; and varying the power density that is applied during each pass in a predetermined manner such that the average power density that is applied to each of the first elongated areas is different from the average power density that is applied to each of the second elongated areas so as to compensate for different thermal characteristics of the materials.