无缝钢管由于它的比刚度远远大于实心圆钢而获得材料的最大经济效果,所以在工业上一些要求重量轻的运输机械上(如飞机、汽车、拖拉机等)有些零件往往是在无缝钢管一端或两端要焊接铰链接头。由于薄壁无缝钢管(1/20<δ/D<1/10、L/D>10)与铰链接头头部要焊接,为了获得好的焊接工艺和焊接强度,所以在无缝钢管端部将壁厚加厚。为了达到这个目的,如果有旋转锻造机那就是最理想的加工设备,否则可 Because of its maximum stiffness, which is far greater than the stiffness of solid steel, the material is most economically viable, so some parts of the industrially demanding transport machinery (such as aircraft, cars, tractors, etc.) tend to be seamless One or both ends of the pipe to be welded hinge joints. Due to the thin-walled seamless steel pipe (1/20 <δ / D <1/10, L / D> 10) to be welded with the hinge joint head, in order to obtain a good welding process and welding strength, Thicker wall thickness. In order to achieve this goal, if there is a rotary forging machine that is the best processing equipment, or