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当看到本刊第六卷(1955年)第三期上发表的‘怎样钻方形孔及多角形孔’一文后,笔者曾进行了比较细致的研究。兹将这些体会提出来,以供读者们参考:一、简单的试验用马粪纸做一道孔FJHG,另做一凸轮CDEB,令凸轮CDEB在导孔内按钻杆方向迴转(如图一),就会发现以下几个问题:(1)凸轮CDEB无论旋转到任何角度,在它的轮廓上永有四点与导孔FJHG的边上接触;(2)在凸轮上能找到一点A,当凸轮迴转时,A的轨
After I saw the article entitled “How to drill a square hole and a polygonal hole” published in the third issue of the sixth volume (1955) of this journal, I conducted a rather detailed study. The experience will be put forward for the reader’s reference: First, a simple test with manure paper to make a hole FJHG, and the other to do a CDEB cam, so that the CDEB cam guide hole in the direction of rotation (Figure 1 ), You will find the following questions: (1) Whether the cam CDEB is rotated to any angle, there are four points on the outline of the cam that always contact with the edge of the guide hole FJHG; (2) A point A can be found on the cam, When the cam is turning, A’s rail