挤出机螺杆的弯矩计算

Calculation of Bending Moment of Extrusion Screw

在计算机上利用 Ｍａｔｈｅ ｍａｔｉｃａ 软件，通过对螺杆截面图形的研究，得出了螺杆截面图形的正确结果，并建立了螺杆表面的参数方程。应用这一结果建立了螺杆弯矩既弯应力的计算公式，对具体例子的计算结果进行比较发现，螺杆的弯应力明显大于文献〔１〕、〔２〕中的相应结果。本文的结果对挤出机螺杆设计中的应力计算提供一定的理论依据。

s A correct cutaway drawing of screw was abtained from the study of the cutaway drawing of screw by means of Mathematica software,a formula for screw surface parameter was established,and the results were applied to the calculation of screw bending stress.It was found in the calculation of a specific screw that the bending stress was notably higher than those reported in the references 1 and 2 mentioned in this paper.The results of this paper provided a theoretical basis for the calculation of bending stress of extrusion screw.