我厂生产的某产品线圈架零件(见图1)在加工过程中,主要工序是铰孔,存在着铰刀使用寿命短(改进前用普通铰刀,如图2所示,平均每把只能加工零件约6～8件)、加工零件废品多,生产效率低、加工质量不稳定等一系列问题。为了提高铰刀的使用寿命,经过反复试验,不断改进,采用多元共渗铝高速钢内冷却铰刀取得满意效果。一、原铰孔存在的问题铰孔时进行了仔细观察,周密分析,找到了存在的主要问题为: I produced a coil of the product parts (see Figure 1) in the processing, the main process is reaming, there is a reamer life is short (before the improvement with a common reamer, as shown in Figure 2, the average only Machinable parts about 6 to 8), processing parts and more scrap, low productivity, processing quality and a series of problems such as instability. In order to improve the service life of the reamer, after repeated tests, continuous improvement, the use of multiple co-aluminized high-speed steel cooling reamer to obtain satisfactory results. First, the problem of the original reaming holes Reaming careful observation, careful analysis, to find the existence of the main problems: