介绍了一种新型的锥形方管无模拉伸成形方法,该方法解决了锥形方管难于塑性成形的问题.通过对锥形方管无模拉伸变形机制的研究,建立了锥形方管无模拉伸的速度模型,制定了无模拉伸加工工艺,给出了主要工艺参数的确定方法.实验研究证明,所建立的速度模型较好地表达了无模拉伸速度变化规律,采用无模拉伸加工方法所获得的加工件,理论尺寸与实际尺寸相对误差小于7.6%.
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