Carrier, Blackman & Associates, P.C.
Process for producing hollow member
A process is provided for producing a hollow member having a wall thickness, in a cross section orthogonal to the longitudinal direction, that varies in the longitudinal direction, the process including a heating step of heating a tubular material (Pa) so that the tubular material (Pa) is given a temperature variation in the longitudinal direction, and a stretching step of axially stretching the tubular material (Pa) that has been heated in the preceding step. In this way, a hollow member having a cross-sectional wall thickness that is variable in the longitudinal direction can be easily produced.
Honda Giken Kogyo Kabushiki Kaisha
B B B
B21C B21K B21D
inventional inventional inventional
Kenji Izuru Kouki Yuji Kazuo Manabu
Miyanaga Hori Mizutani Kanai Isogai Maruyama