Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
VALVE GUIDE AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JP09144515
Kind Code:
A
Abstract:

To provide a valve guide having excellent wear and abrasion resistance and machining working properties at a low price by providing an enlarged diameter stepped part having required length on the inner periphery of both longitudinal end parts in a cylindrical guide body, and fittedly attaching an annular member formed of excellent wear and abrasion resistant material in both the enlarged diameter stepped parts.

A valve guide 1 is composed of a guide body 2 having expanded diameter stepped parts 2a severally formed on the inner peripheries of vertical end parts and an annular member 3 fittedly attached in both the expanded diameter stepped parts, and the length of the expanded diameter stepped part 2a is set up to be about 1/3 of the total length of the valve guide 1 or less than the above total length. The guide body 2 is formed of free-cutting steel having added machinability improving element of a middle carbon steel, and on the other hand, the annular member 3 is formed of excellent wear and abrasion resistant material such as high-speed steel. Thus when the guide body 2 is formed of material having excellent machinability, and only both its end parts are formed of material having excellent wear and abrasion resistance, machinability becomes excellent, and the life of a tool can be elongated and the manufacturing cost can be reduced.


Inventors:
Hirose, Masahito
Application Number:
JP1995000300872
Publication Date:
June 03, 1997
Filing Date:
November 20, 1995
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
FUJI OOZX INC
International Classes:
F01L3/08; B22F3/02; B22F3/035; B22F5/00; B22F5/12; C22C38/00; F01L3/00; B22F3/02; B22F3/03; B22F5/00; B22F5/12; C22C38/00; (IPC1-7): F01L3/08; B22F3/035; B22F5/12; C22C38/00