Nut, female thread machining device and female thread machining method
AssigneeHonda Motor Co., Ltd.
InventorsYota Eguchi, Hiroki Fujiuchi, Naoki Takahashi, Toshihiro Murakawa
Life of this patent
Estimating the term…
Abstract
There is provided a nut having a thread portion having a female thread, a metallic plate portion having a base segment, and a hardness gradient portion provided between the thread portion and the metallic plate portion. The thread portion, metallic plate portion and the hardness gradient portion are monolithic each other, a metallographic structure of the metallic plate portion differs from a metallographic structure of the thread portion and a hardness of the hardness gradient portion is lower than a hardness of the thread portion and lowers from the thread portion toward the metallic plate portion.
Claims5
A nut comprising:
- a thread portion having a female thread;
- a metallic plate portion having a base segment;
- and
- a hardness gradient portion provided between the thread portion and the metallic plate portion,
- wherein the thread portion, metallic plate portion and the hardness gradient portion are monolithic each other,
- a metallographic structure of the metallic plate portion differs from a metallographic structure of the thread portion and
- a hardness of the hardness gradient portion is lower than a hardness of the thread portion and lowers from the thread portion toward the metallic plate portion.
5-19. (canceled)
Dependencies are inferred from the claim text.