APPARATUS FOR DRAWING METALLIC TUBE WITH WALL THICKNESS VARIABLE ALONG DRAWN TUBE Russian patent published in 1997 - IPC

FIELD: matching of motion of cone mandrel in drawing die and motion of drawn tube. SUBSTANCE: apparatus includes drawing die, short cone mandrel secured to end of rod and drawing car. Mandrel rod is jointly connected with one arm of double-arm lever having rotation axle mounted in frame. Second arm of said double-arm lever carries grooved roller arranged in pair with identical roller mounted in frame. Template is arranged between rollers in their grooves. Said template is in the form of spindle-shaped body of revolution having curvilinear generatrix. Template is joined with longitudinal tie rod whose opposite end is jointly connected with drawing car. EFFECT: improved design. 1 dwg