Method and system to start and use combination filler wire feed and high intensity energy source for root pass welding of the inner diameter of clad pipe
US9718147B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2015 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Jul 19, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/50
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A welding system includes at least one high intensity energy source to create a weld puddle during a root pass on a narrow joint of a workpiece with a clad layer. The system also includes a controller to control a weld ramp out process such that, as the molten puddle advances to a start of an existing root pass weld, the controller at least one of decreases an energy output of the at least one high intensity energy source and reduces an interaction time between the at least one high intensity energy source and the weld puddle. After completion of the root pass, a thickness of a root pass weld in a region that is at or near the start point of the existing root pass weld is in a range of 100 percent to 130 percent of a nominal root pass thickness of a remainder of the root pass weld.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.