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1. (WO2018020872) POST-HEAT TREATMENT DEVICE AND POST-HEAT TREATMENT METHOD

Pub. No.:    WO/2018/020872    International Application No.:    PCT/JP2017/021740
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Wed Jun 14 01:59:59 CEST 2017
IPC: C21D 9/04
B23K 31/00
C21D 1/26
C21D 1/42
C21D 9/50
G01B 11/00
Applicants: DAI-ICHI HIGH FREQUENCY CO., LTD.
第一高周波工業株式会社
Inventors: SUGIYAMA Kenji
杉山 健治
MATSUMOTO Nobuhiko
松本 信彦
HARADA Ryuta
原田 龍太
Title: POST-HEAT TREATMENT DEVICE AND POST-HEAT TREATMENT METHOD
Abstract:
Provided are a post-heat treatment device and a post-heat treatment method, whereby welded sections can be automatically detected and heat treatment performed thereon, in a post-heat treatment device that performs post-heat treatment on welded sections of rails. The present invention comprises: a displacement detection means 35 that detects displacement of a rail surface at each prescribed pitch along the longitudinal direction of the rail R; a control means 2 that determines the start point of a welded section if the displacement detected at each prescribed pitch by the displacement detection means exceeds a prescribed threshold value a prescribed number of times consecutively and determines the end point of the welded section if the displacement falls below the prescribed threshold value a prescribed number of times consecutively; and heating means 10a, 10b, 10c, 10d that perform heat treatment on the basis of the position of the welded sections detected by the control means.