| 摘要 |
<p>The present invention is a method for welding difficult-to-weld metal components as illustrated in the welding of a receiver (10) for a weapon. The method reduces net distortion by a number of techniques, including: cooling the weld with Carbon Dioxide preheated with the welding torch tip (66); use of not more than approximately 4 % oxygen in the shield gas to enable hotter, faster welding; the use of a reduced voltage and wire feed rate at the end of a weld to avoid cracking; the intentional use of distortion to reduce net distortion; and sequencing of welds to reduce distortion. Distortion can be introduced in the stamped parts as they are made or when placed in a fixture (12) for welding that, when welded, have less distortion than before. Distortion can also be countered by welding parts in a sequence where a subsequent weld reduces the distortion of a previous weld.</p> |
