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硬质合金拉铰刀是一种加工深孔的新型刀具。其优点是被加工孔的精度可达Ⅲ级,光洁度达▽7,切削速度提高10倍,使用寿命比高速钢铰刀提高3～10倍。它还能铰削高强度合金钢,尤其适合加工液压缸体,能使缸体内壁产生挤压层,此挤压层既耐磨又不易拉毛。用机械夹固的方法可使刀片的切削性能和使用寿命大大提高,克服了焊接所产生应力集中、强度降低的缺点。图1所介绍的是φ160mm 机械夹周式拉铰刀的结构,下面着重介绍其结构和刀片参数的选择。
Carbide pull reamer is a new type of deep hole processing tool. The advantage is the accuracy of the hole can be processed up to Ⅲ grade, finish ▽ 7, cutting speed increased by 10 times, the service life of high-speed steel reamers increased by 3 to 10 times. It can also reheat the high-strength alloy steel, especially for the processing of hydraulic cylinder, the cylinder wall can produce extrusion layer, the extrusion layer is both wear-resistant and easy to nap. The method of mechanical clamping can greatly improve the cutting performance and service life of the blade, and overcome the disadvantages of stress concentration and strength reduction caused by welding. Figure 1 describes the structure of the φ160mm mechanical clamp week-type reamer, the following focuses on the structure and choice of blade parameters.