以往用切削棒材方法制造的管子,现在改用对板材进行拉深的方法成形具有自由直径和壁厚的管子。在某种程度可对管子内壁进行镜面精加工。由于用这种方法成形的管子不需要对端面进行磨削,所以可降低生产成本30～40%。这种管子的应用范围以电子行业中的小型零件为主。现在已开始试制以铝材为基 In the past, tubes made by the cutting bar method were now used to form tubes with a free diameter and wall thickness by drawing the sheet. To some extent, the inner wall of the tube can be mirror finished. Since the tube formed by this method does not require grinding of the end face, the production cost can be reduced by 30 to 40%. The scope of application for this tube is dominated by small parts in the electronics industry. Now trial production of aluminum-based