Title:
ヒータの製造方法及びヒータ
Document Type and Number:
Japanese Patent JP7004456
Kind Code:
B2
Abstract:
To provide a process of manufacture of heater and a heater in which when a sheath pipe and a housing are welded by laser over a peripheral direction to enable occurrence of cracks at the formed melting part to be restricted and a water tightness between the sheath pipe and the housing can be assured.SOLUTION: This invention relates to a process of manufacture of a heater in which a melting part is formed over an entire circumference of an overlapped part where an extremity end side of a housing and a rear end side of a sheath pipe are overlapped in an axial line direction. The process of manufacture of a heater comprises a first laser radiation stage in which a laser is radiated in at least one round over an entire circumference against the overlapped part to form the first melting part over the sheath pipe and the housing, and a second laser radiation stage in which laser is wound around the entire circumference by one round in respect to the first melting part to form a melting part where a part of the first melting part is changed to the second melting part through re-melting action.SELECTED DRAWING: Figure 4
Inventors:
Hirofumi Okada
Makoto Ejiri
Makoto Ejiri
Application Number:
JP2018071198A
Publication Date:
January 21, 2022
Filing Date:
April 02, 2018
Export Citation:
Assignee:
Nippon Special Ceramics Co., Ltd.
International Classes:
F23Q7/00
Domestic Patent References:
| JP2010203763A | ||||
| JP58000020A | ||||
| JP2014147962A | ||||
| JP11294769A | ||||
| JP4080521A | ||||
| JP2003088971A |
Foreign References:
| WO2012160816A1 |
Attorney, Agent or Firm:
Hiroki Nakajima