SHEET BENDING MACHINE AND PRODUCTION OF INCREASING RADIUS OF CURVATURE Russian patent published in 2015 - IPC B21D7/02 

FIELD: metallurgy.

SUBSTANCE: bending is executed at the sheet bending machine. Forming drum is mounted at the bed of said machine. Said drum is composed of shaped cams coupled by two rods. One of the latter makes the shaft resting on two brackets arranged at said bed and revolved by the handle. The sheet blank end is fitted into the forming drum cutout, the drum being turned clockwise by aforesaid handle. Sheet elastoplastic straining starts after the sheet is pressed to the bed and ends at the moment the drum cams rest on the bed. After removal of the torque applied to the handle the sheet blank springs back to preset shape of the part.

EFFECT: higher precision of bending to low curvature radii of resilient steel sheets.

2 cl, 7 dwg