Heating furnace
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Jan 11, 2018
app pub date -
Jun 28, 2017
filing date -
Jul 11, 2016
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Abstract
A heating furnace includes a bolt inserted through an insertion hole in a part of a heater and further inserted into a hole on a tip surface of an electrode rod. A first washer is between a bearing surface of the bolt and one face of the heater. A second washer is between another face of the heater and the tip surface. The relation of: |L0·α0−(TH·αH+TB·αB+TE·αE)|·ΔT≤0.15(TB+TE) is satisfied, where L0 is an interval between the bearing surface and the tip surface, α0 is a linear expansion coefficient (LEC) of the bolt, TH, TB and TE are thicknesses of the part, first and second washers and αH, αB and αE are their LECs, respectively, and ΔT is a temperature increment quantity of a part where the heater and the electrode rod are fastened by the bolt.
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