| 摘要 |
PURPOSE:To improve the efficiency of the operation for straightening with the steel plates of 4-12mm. thickness, by heating the weld zone of steel plates with a TIG arc of high current and large extension then cooling quckly the weld zone. CONSTITUTION:The effect of straightening is higher as the thickness is smaller and the effect of straightening is increased by increasing electric current but the flaws on the base material increase. However, the damage on the surface of the base material can be prevented by increasing the extension. The rate of straightening is adequately about 100cm/min and if the strain is not relieved at one time, the repetition of straightening is required. |
