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(一)绪言用角铣刀铣削普通的直铰刀的方法,已由本刊第二卷第七期中“怎样铣制铣刀铰刀等齿槽的倾角”以及第二卷第九期中“如何铣制铣刀的倾角及馀隙角”二文中说明了。当铣削退拔铰刀的时候,因为它大小两头的直径不相等,如果仍将它的中心轴线放成水平位置,那末,铣削后它两头的齿顶圆弧长度必不会相等,而一般是大头的齿顶圆弧比小头的要狭。齿顶圆弧长度决定麿齿后的稜边(Land)宽度,而稜边宽度对于铰刀在铰孔时的摩擦有关;因此我们希望它大小两头的齿顶圆弧长度相等。但在直径比较细的退拔铰刀中,为了照顾大头的曲的强
(A) Introduction The method of milling an ordinary straight reamer with an angle milling cutter has been described in “How to Milling Inclination of Molars and Other Gullets”, Vol. II, No. 7 and No. 9 in Volume II Inclination mill milling angle and clearance angle "two articles described. When milling a reamer, because its diameter is not equal at both ends, if its center axis is still placed horizontally, the lengths of the circular arcs at both ends of the rectangle after milling must not be the same, but generally The tip of the tooth is larger than the tip of the tooth. The length of the addendum arc determines the width of the land behind the fang, and the width of the edge is related to the reamer friction at the reaming; therefore, we would like the lengths of the addendums to be equal at both ends. However, in the relatively small diameter Reamer, in order to take care of the bulk of the song