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在一些现在机器制造部门中,需要不锈钢、耐热钢和其他材料的特薄壁圆筒,其t∶D=1000(筒径为300～1000毫米)和D∶L≤1.5,当壁厚为0.2～0.6毫米时径向精度为4级和5级、壁厚公差为0.03～0.04毫米(t—被加工零件的壁厚;D—直径;;L—长度)。已知的正向和反向旋压方法,如实验指明的那样,不能得到给定尺寸的优质零件.应该强调指出,正向旋压(金属流动方向与工件的送进方向一致)时零件的被加工部分承受变形拉力作用,而非变形部分没有应力。为了克服芯轴和毛坯非变形段之间(间隙小)的摩擦力,使毛坯沿芯轴移动,必须有足够
In some current machine building departments, special thin-wall cylinders of stainless steel, heat-resistant steel and other materials are required, with t: D = 1000 (300-1000 mm diameter) and D: 0.6 mm radial accuracy of 4 and 5, wall thickness tolerance of 0.03 to 0.04 mm (t-processed parts of the wall thickness; D-diameter ;; L-length). Known forward and reverse spinning methods, as experimentally specified, do not yield a high-quality part of a given size. It should be emphasized that in the forward spinning (where the metal flows in the same direction as the workpiece is fed) The part to be processed is subject to deformation and tensile stress, while the non-deformed part is not stressed. In order to overcome the friction between the mandrel and the non-deforming section of the blank (small gap), the blank must be moved along the mandrel and there must be sufficient