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由于扁钻结构简单,有较好的刚度和强度,并可根据被加工孔的需要,很方便地磨出所需形状。所以广泛地用于硬铝、铅黄铜以及硬塑料的孔加工中,也常用于对钢件的扩孔加工。特别是在引信制造业中,加工铜、铝件的锥孔、成型孔和阶梯孔更为常见。用于半精加工或精加工中可以获得较高的精度(IT10～IT11)和表面粗糙度(Rα3.2～Rα1.6)。某种程度上可以代替铣刀和铰刀,故扁钻也有“扁铣子”之称。其主要缺点是负前角大,切削条件差,排屑困难以及导向性差。这些缺点可以在设计中加以克服和改善。一、扁钻的结构要素扁钻是由柄部和工作部分两大部分所组成,见图1。视其大小可以做成整体式或焊接式。
As the flat diamond structure is simple, better stiffness and strength, and can be processed according to the needs of holes, it is easy to get the desired shape. So widely used in hard aluminum, lead brass and hard plastic hole processing, but also commonly used in steel reaming processing. Especially in the fuze manufacturing industry, the processing of copper, aluminum cone, forming holes and stepped holes are more common. For semi-finishing or finishing can get higher accuracy (IT10 ~ IT11) and surface roughness (Rα3.2 ~ Rα1.6). To some extent you can replace the cutter and reamer, so flat diamond is also called “flat milling.” The main disadvantage is the large negative anterior horn, poor cutting conditions, chip evacuation and poor guidance. These shortcomings can be overcome and improved in the design. First, the structural elements of flat diamond Drilling and working parts from two major components, shown in Figure 1. Depending on its size can be made as a whole or welded.