Displacement monitoring system for stud welding
US5406044A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1994 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Apr 20, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/205
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A system (10) and method for predicting weld quality in a stud welding system by measuring the displacement of a movable shaft (20) with respect to the gun body (12) during the weld process. A sensor (34) is positioned with respect to the welding system in order to produce a series of discrete signal values each indicative of this displacement. These values are plotted graphically and used to produce a weld "signature" which can be compared with signatures of welds of known quality to more accurately predict the quality of the current weld. Based on these weld signatures, various weld parameters including current, time and lift can then be adjusted until a consistent signature indicative of good weld quality is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.