METHOD OF AND APPARATUS FOR COOLING A HEATED WELD BY CONTROLLING THE FLOW RATE OF EMITTED SOLID CARBON DIOXIDE PARTICLES

摘要

The invention relates to a method of cooling a heated weld zone formed in a workpiece (12) by a welding process, in which solid carbon dioxide particles (18) are emitted from a nozzle towards the weld zone, and the cooling rate of the weld zone is controlled through controller (80) by controlling the rate at which solid carbon dioxide particles flow from the nozzle.