Title:
HIGH-FREQUENCY HARDENING METHOD AND DEVICE FOR CRANK SHAFT
Document Type and Number:
Japanese Patent JPH0633145
Kind Code:
A
Abstract:
PURPOSE: To shorten the tact time of a hardening stage at the time of hardening many crank shafts.
CONSTITUTION: The unhardened crank shaft W existing in a hardening standby position 3A is moved to a hardening position 3B through a first path EP and the hardened crank shaft existing in the hardening position 3B is moved through a second path into the hardening standby position 3A. The unhardened crank shaft W is hardened in the hardening position 3B. The hardened crank shaft W moved to the hardening standby position 3A is ejected during the hardening and the unhardened crank shaft W is moved from an idling station 2 in the front stage of the hardening standby position 3A to the hardening standby position 3A.
Inventors:
MAKI SHINTARO
Application Number:
JP21364592A
Publication Date:
February 08, 1994
Filing Date:
July 16, 1992
Export Citation:
Assignee:
FUJI ELECTRONICS CO LTD
International Classes:
C21D1/10; C21D9/30; (IPC1-7): C21D9/30; C21D1/10
Domestic Patent References:
| JPS5632373A | 1981-04-01 | |||
| JPH03226524A | 1991-10-07 |
Attorney, Agent or Firm:
Koji Onishi