SHEET-BENDING FOUR-ROLLER MACHINE Russian patent published in 1994 - IPC

FIELD: plastic metal working. SUBSTANCE: sheet-bending four-roller machine has bedplate 1, uprights 2, 3, side rollers with their drives 6, 7 and lower roller 8 with drive all mounted in uprights. Upright 2 is provided with pivotal collapsible support 10 with throwing back drive 11, and top roller 13 is mounted on upright 3 in body 12. Body 12 has two fingers placed horizontally and pivotally fastened in holes of upright 3. One of the flanges of hollow bushing is attached to body 12. Cantilever section of top roller 13 passes through the hollow bushing. To another flange of hollow bushing 17 is attached engine 20 (hydraulic motor in particular) whose outlet end is connected to cantilever section of top roller. Such a design provides adjustment of top roller since after opening of collapsible support the roller finds itself only inside body 12. As the body is horizontally hinged on fingers position of top roller can be adjusted with a desired reliability. EFFECT: enhanced operating reliability. 3 dwg