TIG PROOFREADING METHOD OF AL SHEET TRANSFORMATION

摘要

In method for TIG faring of distortion and shrinkage during welding of Al metal plate (5000 series) with a thickness of 1-15 mm, a method is characterized by faring the distortion of fluminum base metal by high temperature arc heat generated between Al base metal and nonconsumable electrode located at a distance 4-7 mm from base metal with the flow of Ar or He at a rate of 10-25 l/min and after fairing, grinding the surface of Al base metal with a paper disk. In this method, the surface of Al base metal is heated to 350- 550 deg.C by arc heat, it can minimize the distortion and shrinkage and fare the disotrtion smoothly without melting Al base metal.