Nissan Motor Company Limited

Tomoyuki Hirota

Kazuhiro Mitamura

Masaaki Yoshitome

Hideto Kanafusa

Kazuto Ueno

Takashi Haraoka

Satoru Majima

Hajime Minagawa

Shinji Ooe

Tomoaki Watari

Hiroshi Takano

Yujiro Ohara

A preform having edges overlapped and jointed, two outer members for forming outer surfaces of a hydroformed product, and reinforcement members for forming reinforcement ribs that divide a hollow cross section of the hydroformed product, including a joint formed by, when more than three sheet materials for forming the outer members and the reinforcement members are overlapped together, welding a first sheet material on a surface of the overlapped sheet materials to a second sheet material positioned inside the first sheet material, and a space disposed and aligned with a joint plane between the second sheet material and a third sheet material located inside the second sheet material during the welding process.

Preform, hydroforming method, and hydroformed product

An assembled camshaft () for engine includes: a cam lobe piece (); and a hollow shaft member () having at least two shaft fixing surfaces (A) formed by plasticity process on a portion of the hollow shaft member () corresponding to a position between cylinders of the engine.

Assembled camshaft for engine and production method thereof

Growing community of inventors

Yokohama, Japan

Tomoyuki Hirota