Punching-shearing method for inspecting quality of butt welded joint
US4416158A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 3, 1982 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | Feb 3, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0274
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A punching-shearing method for inspecting the quality of a butt welded joint comprises pressure butt welding steel members under heat to form an annular bulge around the joint portion of the steel members, punching-shearing the bulge under red heat immediately after the pressure butt welding process from one side of the bulge in parallel with the axes of the steel members by use of a shearing die having higher and lower shearing edge portions so that the higher shearing edge portions penetrate the bulge prior to the lower shearing edge portions, so as to cause the base of the bulge to remain around the joint portion in a slightly higher position than the peripheral surfaces of the steel members, and determining the quality of the joint portion from the peripheral surface of the base of the bulge remaining on the joint portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.