中空ラックバーの製造方法及び製造装置

Title:

中空ラックバーの製造方法及び製造装置

Document Type and Number:

Japanese Patent JP7133304

Kind Code:

B2

Abstract:

A manufacturing method is provided for a hollow rack bar made of a hollow shaft material and including a toothed section which has a rack on an outer surface and a shaft section which is thinner than the toothed section. The manufacturing method includes: (i) drawing the hollow shaft material using a die and a plug, and preforming regions of the hollow shaft material including a toothed section formation region configured to become the toothed section and a shaft section formation region configured to become the shaft section so as to have thicknesses according to the respective regions; and (ii) forming the rack at the toothed section formation region of the hollow shaft material which is preformed.

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Inventors:

Toshifumi Uemoto
Nobumoto Isshiki
Takashi Yamawaki

Application Number:

JP2017223770A

Publication Date:

September 08, 2022

Filing Date:

November 21, 2017

Export Citation:

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Assignee:

Neturen Co., Ltd.

International Classes:

B21C37/15; B21C1/00; B21K1/76

Domestic Patent References:

JP2007275896A

Foreign References:

EP0099311A1
DE19508798A1
US20060201227

Attorney, Agent or Firm:

Patent Business Corporation Koei Patent Office

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