Patent ID: 7231796
Filing Date: 2007-06-19
Classification: B21D

Abstract:
1. A roll-forming machine for the formation of a C-shaped component and a Z-shaped component selectively from sheet materials, comprising: a machine base, said machine base comprising a guide block unit provided at a front side thereof for guiding in a sheet material for processing; a plurality of sheet-transfer roll sets, each said sheet-transfer roll set comprising a left-side support and a right-side support arranged in parallel, a first axle and a second axle horizontally pivotally connected between said left-side support and said right-side support at different elevations, an impression roll fixedly mounted on said first axle, a sheet-transfer roll fixedly mounted on said second axle in proximity to said impression roll, a first gear wheel fixedly mounted on said first axle, a second gear wheel fixedly mounted on said second axle and meshed with said first gear wheel, a reduction gear box, and a coupling coupled between said reduction gear box and said second axle; a sheet-transfer roll set driving motor coupled to the reduction gear box of one said sheet-transfer roll set and adapted to drive the reduction gear box of each said sheet-transfer roll set to rotate the second axles of said sheet-transfer roll sets and to further rotate the impression rolls and sheet-transfer rolls of each said sheet-transfer roll set relative to each other in reversed direction to transfer a sheet material; and a plurality of forming roll sets, each said forming roll set comprising a left-side wheel holder, a right-side wheel holder, a first left-side forming roll and a second left-side forming roll pivotally mounted on said left-side wheel holder at different elevations, and a first right-side forming roll and a second right-side forming roll pivotally mounted on said right-side wheel holder at different elevations corresponding to said first left-side forming roll and said second left-side forming roll; wherein the left-side support and right-side support of each said sheet-transfer roll set are respectively fixedly fastened to said machine base at left and right sides; the left-side wheel holder and right-side wheel holder of each said forming roll set are respectively fastened to a first left-side bottom plate, a first right-side bottom plate, a second left-side bottom plate and a second right-side bottom plate, said first left-side bottom plate and said first right-side bottom plate each having a plurality of sliding blocks provided at a bottom side and respectively coupled to a first left-side rail and a first right-side rail at said machine base, said second left-side bottom plate and said second right-side bottom plate each having a plurality of sliding blocks provided at a bottom side thereof and respectively coupled to a second left-side rail and a second right-side rail at said machine base, wherein a pivot shaft at the left-side wheel holder of each said forming roll set has an outer end connected to a steering device, which is mounted on an upright at the first left-side bottom plate of the respective forming roll set, the steering devices of said forming roll sets being coupled to transmission shafts and then a motor by couplings for enabling the motor to rotate the transmission shafts and the couplings and to further drive the pivot shaft at the left-side wheel holder of each said forming roll set to turn wheel brackets at the left-side wheel holders of the forming roll sets through 180°, for selectively enabling the forming rolls of said forming roll set to roll a sheet material into the C-shaped component or the Z-shaped component.