| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that it is difficult to attain cost reduction because equipment becomes large necessarily as a press forming device is used for manufacturing an axle beam in background technology. SOLUTION: This invention relates to a method for manufacturing the axle beam, in which a workpiece 100 of which the stock is a pipe is formed in a nearly U-shaped cross-sectional shape to form the axle beam, wherein the workpiece is supported with guide rolls 7 or the like, for example, and moved in the length direction of the workpiece by driving rotational force of the forming rolls or the like, for example, while a part of the length range of the workpiece is compressed with a pair of upper and lower forming rolls 1, 2 the upper one of which is protruded and the lower one of which is recessed. COPYRIGHT: (C)2011,JPO&INPIT |
