Bronis Mateusz, Miko Edward, Nowakowski Lukasz, Bartoszuk Marian
Department of Manufacturing Engineering and Metrology, Kielce University of Technology, al. Tysiaclecia Panstwa Polskiego 7, 25-314 Kielce, Poland.
Department of Manufacturing and Materials Engineering, Opole University of Technology, ul. S. Mikołajczyka 5, 45-271 Opole, Poland.
Materials (Basel). 2022 Aug 10;15(16):5500. doi: 10.3390/ma15165500.
This article discusses experimental results concerning the quality of through holes drilled in Inconel 718. The tests involved hole cutting under 27 different conditions using different values of the feed per revolution and spindle speed, and different types of kinematic system. The drilling was performed on a CTX Alpha 500 universal turning center using tools with internal coolant supply. Three kinematic systems were considered for hole cutting. The first, based on the driven tool holder, had a stationary workpiece and a rotating and linearly fed tool. In the second, where drilling was based on the spindle rotations, the workpiece rotated while the tool moved along a straight line. In the third system, the workpiece and the tool rotated in opposite directions; the tool also performed a linear motion. The study aimed to assess the quality of holes on the basis of the following output parameters: the hole diameter, cylindricity and straightness errors, and the surface texture. A multifactorial statistical analysis was used to determine how the hole quality was dependent on the process parameters and the type of drilling kinematics. The findings confirm that the kinematic system, as well as the feed per revolution, are the key factors affecting the quality of holes drilled in Inconel 718. The analysis of the hole drilling process for Inconel 718, performed using a CNC turning center, shows that the third kinematic system was the best option as all the four parameters describing the hole quality had the lowest values. The best results were obtained in the 6th ( = 637 rpm, = 0.075 mm/rev, KIN III) and 8th experiments ( = 955 rpm, = 0.075 mm/rev, KIN II), because the parameters were then the lowest, with the scatter of results being up to 30%.
本文讨论了关于在因科镍合金718上钻出的通孔质量的实验结果。测试涉及在27种不同条件下进行孔加工，使用了不同的每转进给量和主轴转速值，以及不同类型的运动系统。钻孔是在CTX Alpha 500通用车削中心上使用具有内部冷却液供应的刀具进行的。考虑了三种用于孔加工的运动系统。第一种基于动力刀架，工件固定，刀具旋转并直线进给。第二种，钻孔基于主轴旋转，工件旋转而刀具沿直线移动。在第三种系统中，工件和刀具反向旋转；刀具也进行直线运动。该研究旨在基于以下输出参数评估孔的质量：孔径、圆柱度和直线度误差以及表面纹理。使用多因素统计分析来确定孔质量如何取决于工艺参数和钻孔运动学类型。研究结果证实，运动系统以及每转进给量是影响因科镍合金718上钻出的孔质量的关键因素。使用数控车削中心对因科镍合金718的钻孔过程进行的分析表明，第三种运动系统是最佳选择，因为描述孔质量的所有四个参数的值最低。在第6次实验（= 637转/分钟，= 0.075毫米/转，KIN III）和第8次实验（= 955转/分钟，= 0.075毫米/转，KIN II）中获得了最佳结果，因为当时参数最低，结果的离散度高达30%。
