METHOD OF CONTACT BUTT WELDING BY FUSION OF ROUND CROSS-SECTION PARTS WITH SUBSEQUENT REMOVAL OF FLASH Russian patent published in 2012 - IPC B23K11/04 B23K37/08 

FIELD: process engineering.

SUBSTANCE: invention may be used in contact butt welding by fusion at special welding machine of drawing shops for enlargement of wire coils. Ends of parts are cut, butted and clamped in moving and fixed electrodes with hard alloy half-sleeves with cutting edges made on opposite sides. Said half-sleeves are arranged with shift of vertical plane of cutting edges by amount exceeding the width of fillet upset in butt metal yielding. Moving clamp is displaced together with part for fusion and upsetting. After upsetting to preset allowance and cutting off of welding transformer without removing upsetting force, electrode clamping force is decreased to allow slippage of welded parts. Flash heated in welding is first cut by edge of one of aforesaid sleeves while remaining flash is removed by another edge of the same clamp half-sleeve.

EFFECT: higher efficiency of welding and flash removal.

5 cl, 5 dwg