Method and apparatus for controlling the temperature of continuously fed wires
US4580026A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1985 |
| Grant date | Apr 1, 1986 |
| Priority date | — |
| Expiry date | Jun 5, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/1093
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention provides an apparatus and a method for controlling the thermal state of a welding wire which is continuously fed and heated between two electric contact tips having a dielectric gap of a predetermined length therebetween. Heating is effected by passing an electric current between the two contact tips and through the wire. The method of this invention comprises the steps of characterizing the welding wire by establishing a preheating current versus wire feed rate relationship, predetermining the average temperature of the outcoming wire at known preheating currents and known wire feed rates, and establishing a series of temperature isotherms based at least in part on the aforedescribed relationship between heating current and wire feed rate. The apparatus includes a pre-programmed computer system which coordinates the wire feed rate and preheating power application to the cold wire according to the method of this invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.