Fuji Tekko Co., Ltd.

Masaji Yamada

Hideo Hikuma

A workpiece bite device having a pinch member provided at a side for biting a workpiece in a pair of flat cutters which are disposed with those working blades facing each other for rolling the workpiece. The pinch member is fitted to a cutter body such that a starting portion of the pinch member is positioned at a side for charging the workpiece rather than a starting portion of the working blades of the cutter body, a terminal portion is positioned at a side of the working blade starting portion of the cutter body, and a top of the pinch member protrudes higher than a top of the working blade starting portion.

Workpiece bite device in a rolling flat cutter

A method of rolling with flat cutters having finishing blades for rolling a periphery of a pipe. In working, the pipe is rotatably supported at both ends by a pair of centers, a pair of flat cutters which have a plurality of corrugated finishing blades formed on a substantially triangular blade base are disposed such that the finishing blades face each other and the directions of the finishing blades are parallel to an axis of the pipe, and the flat cutters are moved rectilinearly in opposite directions to each other from an initial working position to a terminal working position such that one end of each finishing blade presses the pipe. Thus, the periphery of the pipe is progressively worked axially from one end of the pipe.

Method of rolling a pipe by flat cutters

A rolling flat cutter having finishing blades corresponding to corrugation of a product to be obtained by working a tubular or cylindrical workpiece, and a method of rolling by the flat cutter. When the workpiece is worked, a pair of flat cutters are disposed such that the finishing blades face each other, and the cutters are moved rectilinearly in opposite directions perpendicular to a direction in which the finishing blades extend so that the corrugation is formed on a periphery of the workpiece from an end to the other in an axial direction thereof. As to the rolling flat cutter, a flat cutter is used which comprises a rectangular cutter body, a triangular blade base formed as a higher step on one side of a plane of the cutter body along a straight line parallel with a diagonal of the plane, and the finishing blades are formed on the blade base.

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Hamamatsu, Japan

Masaji Yamada