Title:
HARDENING AREA MEASURING APPARATUS AND HARDENING AREA MEASURING METHOD
Document Type and Number:
Japanese Patent JP2013234947
Kind Code:
A
Abstract:
To solve the problems of a conventional expensive hardening area measuring apparatus including an eddy-current type non-contact detector, which requires long measurement time.
A hardening area measuring apparatus includes: marking means 1 for forming a plurality of reference lines M at fixed intervals on a surface of a workpiece W; pitch measuring means 3 for measuring a pitch between the reference lines after partially hardening the workpiece W with the reference lines M formed thereon; and area detection means 4 for detecting a hardening area A on the basis of a measurement result of the pitch measuring means 3. In measuring the hardening area A of the workpiece W partially hardened, equipment cost and measurement time can be reduced.
Inventors:
TAKASHIMA KAZUHIKO
NAKAJIMA SHIGERU
WATANABE TAKAFUMI
SUGIYAMA SEIICHI
NAKAJIMA SHIGERU
WATANABE TAKAFUMI
SUGIYAMA SEIICHI
Application Number:
JP2012108498A
Publication Date:
November 21, 2013
Filing Date:
May 10, 2012
Export Citation:
Assignee:
NISSAN MOTOR
International Classes:
G01B11/16
Domestic Patent References:
| JPH0754037A | 1995-02-28 | |||
| JPH01152221A | 1989-06-14 |
Attorney, Agent or Firm:
Janggi Motonori