Locating a welding seam

US4206511A · kind A · utility

Assignee

• Mannesmann AG · DE

Inventors

• Karl Ries · Mülheim, DE
• Dieter Kaiser · Dortmund, DE
• Wolfgang Terschuren · Mülheim, DE

Key dates

• Filing date: May 17, 1978
• Grant date: Jun 3, 1980
• Expiry date: May 17, 1998

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2291/02854
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The welding seam of a pipe is located by means of ultrasonic transducers and echo pulses responding particularly to rather minute distance differences on account of the convex contour of the seam and its elevation above the continued contour of the unmodified parts being welded together. A two or a three transducer configuration is used.