APPARATUS FOR RADIAL FORMING Russian patent published in 2002 - IPC

FIELD: manufacture of rod type filtering members of fuel pumps by radial forming. SUBSTANCE: working profiles of punches are shifted along axis in staggered fashion one relative to another in such a way that pitch values between them in upper and lower portions have doubled size in comparison with pitch value in central portion. Along each punch onto lateral sides of working portion there are radial fillets lowering resistance to metal yielding in radial direction. In order to increase rigidity of apparatus punches are in the form of sectors with springy shock absorbers between them. EFFECT: improved reliability of apparatus, high quality of products. 3 cl, 7 dwg