Arc welding current and voltage control method
US5233158A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1991 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Apr 15, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/073
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A control method capable of effecting satisfactory arc welding by automatically controlling arc welding current and voltage. A processor calculates (106, 112) errors (.epsilon.I, .epsilon.V) between mean value (I, V) of actual welding currents and voltages periodically detected a predetermined number of times and target values IO, VO) of the welding current and voltage. If the welding current error falls outside an allowable range, a wire feeding speed correction amount is determined (.DELTA.FW) (109) by substituting the mean value (I) of the welding currents and a welding current correction amount (.DELTA.I) equivalent to the product of the calculated welding current error and a current gain into a calculation formula containing a first-degree polynomial (g'(I)) for the welding current and a welding current change amount (.DELTA.I) as variables. The wire feeding speed correction amount is input to a welding machine. If the welding voltage error falls outside an allowable range, the processor determines a power supply output correction amount (.DELTA.U) (115) by substituting the welding current correction amount (.DELTA.I) and a welding voltage correction amount (.DELTA.V) equivale…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.