| 摘要 |
PROBLEM TO BE SOLVED: To provide a cross-member for vehicle frame and its manufacturing method capable enhancing the yield of materials without increasing the number of component parts and suppressing the material cost. SOLUTION: The cross-member for the vehicle frame has a channel-shaped or Z-shaped section and a flange having the width widening toward the ends, and its web side is furnished with a slit having a starting point identical to the increase start point of the flange width in a position near each end, and the width increase at each end of the flange is generated by the increase in the slit width at the time of molding etc. The manufacturing method of this cross-member consists of a cutting process to generate slits at the ends of a plate, a first forming process to make the width of the web side near each end (or depth, height, width and depth, width and height) smaller than around the center when the channel-shaped or Z-shaped section is formed from the web side and the flange side continued thereto and make obtuse the bending angle of the flange near the ends, and a second forming process to give the web side near the ends a width (or depth, height, width and bending angle, width and bending angle and height) equal to around the center while the slit is widened. This allows sparing the materials without increasing the component processing cost etc. COPYRIGHT: (C)2005,JPO&NCIPI
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