Document Type and Number:
Japanese Patent JPS5310002
Kind Code:
B2
Abstract:
This invention provides a method for hardening sawteeth which comprises contacting running water with the top ends of sawteeth in air, blowing flames to the top ends of the sawteeth in this state to thereby blow off the running water at parts enveloping the top ends of the sawteeth and heat only the top ends of the sawteeth at a hardening temperature, and then shifting the sawteeth to separate the heated sawteeth from a sphere of influence of the flames and simultaneously cool the sawteeth with the running water. According to this method, the top ends of respective sawteeth of a band saw can be uniformly hardened by a very simple operation without using a hardening apparatus having a complicate structure.
Application Number:
JP6320575A
Publication Date:
April 11, 1978
Filing Date:
May 26, 1975
Export Citation:
International Classes:
B23D63/00; C21D9/24
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