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在生产中,常遇到一些位置公差要求较高的深小孔加工。对于这类工件我们常采用钻模在台钻上按常规方法加工,但其位置公差难以保证。如图所示零件,钻φ2.05mm孔,按常规加工方法,其φ2.05mm孔与A基准的平行度为0.04～0.09mm,造成部分产品超差。但通过对各种因素的分析,多次试验,采用了以下措施,解决了问题。1.依靠钻套导向,钻削时先轻轻点出凹坑,定准中心。2.将台钻转速n提高到6900～10000r/min(这种转速可在高速台钻上
In production, often encounter some of the requirements of the location of the deep hole deep hole processing. For these types of workpieces, we often use the drill in the bench drill according to the conventional method of processing, but the position tolerance is difficult to guarantee. As shown in the figure, drill φ2.05mm hole, according to conventional processing methods, the φ2.05mm hole parallel to the A benchmark for the 0.04 ~ 0.09mm, resulting in some products over tolerance. However, through the analysis of various factors, many tests, the following measures have been adopted to solve the problem. 1. Rely on the drill guide, drill gently when the first point out of the pit, set the center. 2. Drill speed n raised to 6900 ~ 10000r / min (this speed can be drilled in the high-speed bench