METHOD OF FRICTION WELDING WITH MATERIAL MIXING AND DEVICE FOR WELDING Russian patent published in 2008 - IPC B23K20/12 

FIELD: technological processes.

SUBSTANCE: inventions may be used for connection of sheet structures like vessels, panels, profiles and units made of different structural materials, including unweldable ones and restrictedly weldable with melting. Welding device consists of two functionally independent parts. Casing with rest clamp and working rod with annular thread on its surface are installed with the possibility of independent rotation of every one of them. Rod is made with preset angles of cutting profile. Across thread-like rifling slot may be arranged with depth that is equal to 0.5-1 of thread-like rifling depth. Rod rotation in the process of welding is carried out in direction that is opposite to direction of annular thread on its surface. This provides extrusion of plasticised material in direction of working rod free end and to the zone of working rod trace during movement of working rod along joint of work pieces.

EFFECT: more uniform in structure; tight and defect-free welding seam.

4 cl, 2 dwg