Title:
A move hardening apparatus and a move hardening method of a long picture-like work
Document Type and Number:
Japanese Patent JP6108612
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a movement hardening apparatus and a movement hardening method for long work, which provide a hardening pattern with a uniform hardening depth and allow quick movement hardening.SOLUTION: Annular induction parts 5a and 6a of a heating coil 3 are arranged adjacently and made to each face the outer peripheral surface 29 of work W1. Until a specified time passes from the start of induction heat, only the first induction part 5a is applied with a high-frequency electric current, and only a first region of the work W1 is induction-heated, the induction part 5a facing the first region. After a lapse of the specified time, the second induction part 6a is also applied with a high-frequency electric current, and the heating coil 3 is moved along the work W1. A second region and a third region are induction-heated to certain temperatures and then induction-heated by the moved induction part 5a to reach the hardening temperature. As a result, a hardening pattern uniform in hardening depth over the whole regions of the work W1 to be hardened is formed.
Inventors:
Akira Udagawa
Junji Miyuki
Junji Miyuki
Application Number:
JP2013105233A
Publication Date:
April 05, 2017
Filing Date:
May 17, 2013
Export Citation:
Assignee:
Fuji Electronics Industry Co., Ltd.
International Classes:
C21D9/00; C21D1/10; H05B6/06; H05B6/10; H05B6/44
Domestic Patent References:
| JP2008267786A | ||||
| JP50019483B1 | ||||
| JP5214436A | ||||
| JP2004127854A | ||||
| JP10212525A | ||||
| JP1316422A | ||||
| JP6330178A | ||||
| JP38023016Y1 |
Attorney, Agent or Firm:
Takashi Fujita