AutoCAD中三维螺旋弹簧、螺纹的近似画法

在AutoCAD中没有直接绘制三维螺旋弹簧、螺纹的方法。本文主要介绍绘制三维螺旋弹簧的近似方法:对于弹簧的有效圈,在楔形体的斜面上绘制圆弧,沿圆弧路径拉伸簧丝断面圆得半圈弹簧,通过复制、旋转和移动组成一圈弹簧,将一圈弹簧阵列得到整个弹簧;对于弹簧的支撑圈,方法类似,只是楔形体的斜面倾斜角度要小一些。

Approximate Graphics of 3D Spiral Spring and Thread in AutoCAD

There's no direct method to draw graphics of 3D spiral spring and screw thread in AutoCAD. This paper introduces an approximate way to draw graphics of 3D spiral spring. To draw the effectual loop of the spiral spring, firstly one should draw an arc on the bevel of the wedge, then stretch the section plane of the spring along the arc's path to gain a half loop of the spring, and get a whole loop of the spring by copying, rotating and moving which will be arrayed to obtain a full spiral spring. To draw the spring-leaf retainer can use the similar method with the wedge which has a smaller obliquity.