METHOD FOR SHAPING CHUTE-LIKE PANELS OF VEHICLE BODY Russian patent published in 1997 - IPC

FIELD: cold sheet forming, namely manufacture of drawn chute- like panels (hood panels, rear panels of truck cabin, cover panels of van truck and so on) with lateral front walls and one or both opened ends. SUBSTANCE: method comprises steps of bending sheet blank, clamping zone of technological allowance of panels by clamping surfaces of die and holder and drawing blank at braking flange. Zones of allowance adjoining to angles on end sides of blank are not clamped. It significantly reduces dimensions of end sides of blank, allows to eliminate waviness on front surface of lateral walls and provides possibility of changing preliminary bending of sheet blank in unclamped zones according to manufacturing properties of sheet metal. EFFECT: metal economy in allowance zones, enhanced quality of panels due to lowered waviness and scratch of front surface of lateral walls. 2 cl, 6 dwg