Welding complicated, difficult-to-weld metal components
US5440099A · kind A · utility
Inventor
Key dates
| Filing date | Dec 22, 1993 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Dec 22, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/287
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention is a method for welding difficult-to-weld metal components as illustrated in the welding of a receiver for a weapon. The method reduces net distortion by a number of techniques, including: (1) cooling the weld with Carbon Dioxide (CO.sub.2) preheated with the welding torch tip; (2) use of not more than approximately 4% oxygen in the shield gas to enable hotter, faster welding; (3) the use of a reduced voltage and wire feed rate at the end of a weld to avoid cracking; (4) the intentional use of distortion to reduce net distortion; and (5) sequencing of welds to reduce distortion. Distortion can be introduced in the stamped parts as they are made or when placed in a fixture 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. The process is illustrated as applied to a receiver for a weapon made by welding non-compatible and low carbon steels in a low tolerance configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.