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在生产中会遇到这样的问题:在纯铜材料上钻 M6深50mm 的螺孔时,当螺纹底孔钻头钻至状约32mm深时,钻削情况不正常,如再钻深,便开始发出刺耳的尖叫声,而且还会出现钻头被卡甚至折断的现象,故钻头损耗很大。为此,我们经过多次试验,得出下列办法解决了此问题。在钻头的顶端6～7mm 范围内保留钻头原来直径,磨小钻头其余圆柱部份的外径,减小支承面。经这样改进后的钻头,经使用、效果良好。此法也适用于其他粘性金属。
In the production of such a problem encountered: the pure copper material drilling M6 depth 50mm screw hole, when the bottom hole drilled drill bit to about 32mm deep, the drilling situation is not normal, such as further drilling depth, they begin Issued a shrill scream, but also the phenomenon of bit stuck or even broken, so the drill loss. To this end, we have tried many times to come to the following solution to this problem. Keep the original diameter of the drill bit within the range of 6 ~ 7mm at the top of the drill bit, and reduce the outer diameter of the remaining cylindrical portion of the small drill bit to reduce the bearing surface. After the drill so modified, after use, the effect is good. This method also applies to other sticky metals.