DEVICE FOR FRICTION WELDING WITH MIXING OF HOLLOW TUBULAR ARTICLES Russian patent published in 2012 - IPC B23K20/12 B23K37/53 

FIELD: process engineering.

SUBSTANCE: invention may be used for friction welding with mixing of hollow articles. Welding head may be arranged outside article being welded and provided with rollers for tightening welded edges. Roller supports are arranged on base plate legs to be located inside article to be welded. Unlocking rings are to be arranged nearby welded edges outside and inside article, respectively. Every said roller is arranged in case to extend therefrom by tubular article nominal ID. Verniers are arranged on roller support cases to control roller extension size.

EFFECT: higher precision of welding, decreased tolerances.

2 dwg