Method and apparatus for arc welding

US4249061A · kind A · utility

Inventor

• Peter Puschner · Aachen, DE

Key dates

• Filing date: Aug 21, 1978
• Grant date: Feb 3, 1981
• Expiry date: Aug 21, 1998

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K9/127
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A process for adjusting a welding torch with respect to a weld joint formed between two workpieces is disclosed, including determining operating quantities for arcs located in at least two positions relative to said weld joint, deriving characteristic values for each of those operating quantities, mathematically combining such characteristic values, and comparing the mathematical combination with a theoretically calculated value for such characteristic values, and then adjusting the position of the welding torch in accordance with the difference between the mathematical combination of those characteristic values and their theoretically calculated value. An apparatus for effecting such welding torch adjustment is also disclosed, including means for adjusting the welding torch relative to the weld joint, means for producing welding arcs between the welding torch and at least two locations with respect to the weld joint, means for determining characteristic values corresponding to operating quantities of the welding arcs, computer means for mathematically combining those characteristic values, means for comparing the mathematical combination of the characteristic values with a theoret…