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提出一种参数化绘制螺旋叶片展开图的方法及计算机应用程序。该程序用AutoLISP语言编写 ,在AutoCAD环境下 ,一旦调用 ,即可按给定的螺旋叶片的参数外径D、轴径d、螺距S ,自动计算图形尺寸及确定绘图比例 ,从而绘出标注有完整尺寸的螺旋面展开图 ,并在图下写出绘图比例。
A parametric method for drawing a spiral blade expansion plan and a computer application program are proposed. The program is written in AutoLISP language. In the AutoCAD environment, once the program is called, the program can automatically calculate the size of the graphic and determine the drawing proportion according to the parameters of the outer diameter D, the diameter d and the pitch S of the helical blade, so as to draw a mark Full-size helix expansion, and write the plot ratio under the graph.