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我厂在生产中遇到加工图1所示φ2.3的小斜孔和间断孔,山于孔径小,钻头刚度差,钻面与孔轴线不垂直,钻头易引偏等原因,通常很难保证孔的加工精度。为了解决这一问题,我们采取了下述措施: 1.为提高麻花钻刚度,适当加长钻套,为防止钻头引偏及折断钻头,下端面制成与被加工曲面相符合的形状(图2)。 2.两孔之间间断处增加钻套或加一定位心轴,心轴上直接钻孔,经处理后代替钻套。
I plant in the production process encountered in Figure 1 φ2.3 small oblique hole and intermittent hole, the mountain in the small aperture, the bit stiffness is poor, the drilling surface and the hole axis is not vertical, the bit is easy to bias and other reasons, is usually very difficult Hole to ensure the accuracy of processing. In order to solve this problem, we have taken the following measures: 1. In order to improve the stiffness of twist drill, extend the drill sleeve appropriately, in order to prevent the bit from deviating and breaking the bit, the lower end is made into a shape conforming to the machined surface ). 2. Between the two holes to increase the interval between the drill sleeve or a positioning mandrel, the mandrel directly drilled holes, after treatment instead of drill sleeve.