| 摘要 |
PURPOSE:To obtain a highly efficient shearing machine by providing a shearing machine with a mechanical non-uniform motion generating mechanism which drives the cutters planted on a pair of drums perpendicular to the drum surfaces by a non-circular gear. CONSTITUTION:A shearing machine is provided with a shear drum displacement means 10 which makes one (4B) of the shear drums 4A, 4B separated from the other (4A) to miss shearing of a band material 6, and also with a drum rotation detecting means 13 which detects the end of each rotation of the drums 4A, 4B. Furthermore, it is computed how many folds of the synchronized shear length given after each rotation of the shear drum by a mechanical non-uniform motion generating mechanism 2 corresponds to the specified shearing length. Also it is judged whether shearing of the band material 6 is to be carried out or missed, in accordance with the signal from the drum rotation detecting means. Moreover, the shearing machine is provided with a control means 14 which outputs a command signal during rotation of the shear drum 4A, 4B when shearing is to be carried out, to drive shear drum displacement device 10. Thus a small sized highly efficient shear drum is obtained.
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