Title:
Induction hardening method for the inner surface of small holes
Document Type and Number:
Japanese Patent JP6315307
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a coil for induction hardening and an induction hardening method capable of hardening an inner surface of a small hole where it is difficult to harden in a conventional method, without any problem.SOLUTION: A pipe conductor in which coolant flows is used as a coil wire, and the pipe conductor is bent into an U-shape for forming a first coil part, and a second coil part whose bend direction is same to that of the first coil part and disposed in parallel to the first coil part, is formed, and a reverse U-shaped bent part extending from a termination of the first coil part to a start end of the second coil part, is also formed. In the first coil part and the second coil part, current flows in a same direction.
Inventors:
Makoto Sato
Application Number:
JP2013271431A
Publication Date:
April 25, 2018
Filing Date:
December 27, 2013
Export Citation:
Assignee:
Sumitomo Electric Sintered Alloy Co., Ltd.
International Classes:
C21D1/10; H05B6/40; H05B6/42
Domestic Patent References:
| JP9143550A | ||||
| JP2005259558A | ||||
| JP2001158912A |
Attorney, Agent or Firm:
Naoya Kamata
Bunji Kamada
Yaichiro Nakatani
Takayoshi Tagawa
Bunji Kamada
Yaichiro Nakatani
Takayoshi Tagawa
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