Touchwork system for a MIG arc welding apparatus
US4079231A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1976 |
| Grant date | Mar 14, 1978 |
| Priority date | — |
| Expiry date | Mar 30, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/12
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A touchwork system for use in conjunction with a MIG arc welding apparatus comprising a sensing circuit operating at very low output voltages, e.g. 6-8 volts, which senses the touch of the consumable wire electrode to the workpiece when the welding process is started. A control circuit energizes the welding contactor in response to a signal from the sensing circuit and turns on the power supply. At the same time, the control circuit starts the wire feeder motor and also the flow of shielding gas to the torch. A detector circuit detects the flow of welding current and feeds a signal to the control circuit to keep the welding contactor energized and the power supply in circuit and also to maintain operation of the wire feeder motor and the flow of shielding gas to the torch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.