Smak Krzysztof, Szablewski Piotr, Legutko Stanisław, Petru Jana, Kratochwil Jiri, Wencel Sylwia
Faculty of Mechanical Engineering, Poznan University of Technology, 3 Piotrowo Street, 60-965 Poznan, Poland.
Pratt & Whitney Kalisz, 4a Elektryczna Street, 62-800 Kalisz, Poland.
Materials (Basel). 2024 Sep 11;17(18):4465. doi: 10.3390/ma17184465.
The work deals with the influence of the reach of the applied tool holder on the edge wear, dimensional accuracy and surface quality defined by the topography as well as the roughness of the machined surface. The research has been conducted on specimens made of Inconel 718 in the configuration of sleeves, within the scope of finish turning with constant cutting parameters, = 85 m/min; = 0.14 mm/rev; = 0.2 mm. The material under machining has undergone heat treatment procedures such as solution treatment and precipitation hardening, resulting in a hardness of 45 ± 2 HRC. Two kinds of turning holders have been used with the reaches of 120 mm and 700 mm. The tools are intended for turning external and internal surfaces, respectively. The tests have been conducted using V-shaped cutting inserts manufactured by different producers, made of fine-grained carbide with coatings applied by the PVD (Physical Vapour Deposition) and CVD (Chemical Vapour Deposition) methods. The edge wear has been evaluated. The value of the achieved diameter dimensions has also been assessed in relation to the set ones, as well as the recorded values of surface roughness and the surface topography parameters have also been assessed. It has been determined that the quality of the manufactured surface evaluated by the 2D and 3D roughness parameters, as well as the dimensional quality are influenced by the kind of the applied tool holder. The influence is also visible considering the edge wear. The smallest values of the deviations from the nominal dimensions have been obtained for the coated inserts of the range of higher abrasion resistance (taking into account information from the producers). The obtained results show that in predicting the dimensional accuracy in the process of turning Inconel 718 alloy with long-overhang tools, one should consider the necessity of correction of the tool path. Taking into account the achieved surface roughness, it should be pointed out that not only the kind of the tool coating but also the character of its wear has a great influence, particularly, when a long cutting distance is required.
该研究探讨了所使用刀架的伸出长度对刃口磨损、尺寸精度以及由加工表面形貌和粗糙度所定义的表面质量的影响。研究在由因科镍合金718制成的套筒状试件上进行，在精车范围内保持切削参数恒定，即切削速度(v = 85 m/min)；进给量(f = 0.14 mm/rev)；切削深度(ap = 0.2 mm)。被加工材料经过了固溶处理和沉淀硬化等热处理工序，硬度达到45±2 HRC。使用了两种伸出长度分别为120 mm和700 mm的车削刀架，这些刀具分别用于车削外表面和内表面。试验采用了不同厂家生产的V形切削刀片，刀片由细晶粒硬质合金制成，并采用物理气相沉积（PVD）和化学气相沉积（CVD）方法进行涂层处理。评估了刃口磨损情况。还评估了所达到的直径尺寸相对于设定尺寸的值，以及记录的表面粗糙度值和表面形貌参数。已确定，由二维和三维粗糙度参数评估的加工表面质量以及尺寸质量受所应用刀架类型的影响。从刃口磨损情况也能看出这种影响。对于具有较高耐磨性的涂层刀片（考虑厂家提供的信息），获得了与标称尺寸偏差的最小值。所得结果表明，在用长悬伸刀具车削因科镍合金718的过程中预测尺寸精度时，应考虑刀具路径修正的必要性。考虑到所达到的表面粗糙度，应该指出，不仅刀具涂层的类型，而且其磨损特性也有很大影响，特别是在需要长切削距离时。
