The paper presents the results of the modelling and study of the cutting process in the cut-in phase during the machining of external gears by the power skiving. The studies were carried out on the basis of the previously developed graphical model of the cut layers and the model of the cutting force as a function of the chip cross-sectional area, the shear strength limit of the workpiece material, and the intensity of plastic deformation during cutting. The regularities of the cutting force in the cut-in phase of gear machining are shown for successive tool revolutions in four passes with a gradual increase in the depth of cut. It is shown that the peak values of the cutting force at the contact between the front face of the cutter and the face plane are two times higher than under the conditions of steady stationary cutting in a preformed gap. At the same time, the amplitude of the cutting force and its average value over the cut-in passes are 1.7–3.7 times and 1.2–1.5 times higher, respectively, than the corresponding values of these parameters for steady state cutting. It is these peak jumps in the cutting force that limit the maximum depth of the cut, number of passes, and axial feed. Based on the data obtained, recommendations were developed to modify the traditional gear cutting scheme in power skiving. It is proposed to use short tool strokes with a low cutting depth along the length of the cut-in path and, after forming a gap in this area, to cut at a full depth to the full height of the gear rim. The possibility of a significant reduction of gear machining time using the proposed scheme of technological operation is demonstrated.

Ihor Hrytsai

Andrii Slipchuk

Acta Polytechnica

Acta Polytechnica is a scientific journal published by CTU in Prague. The main title, Acta Polytechnica, is accompanied by the subtitle Journal of Advanced Engineering, which defines the scope of the journal more precisely - Acta Polytechnica covers a wide spectrum of engineering topics, physics and mathematics.    Our aim is to be a high-quality multi-disciplinary journal publishing the results of basic research and also applied research. We place emphasis on the quality of all published papers. The journal should also serve as a bridge between basic research in natural sciences and applied research in all technical disciplines.    The innovative research results published by young researchers or by postdoctoral fellows, and also the high-quality papers by researchers from the international scientific community, reflect the good position of CTU in the World University Rankings.    We hope that you will ﬁnd our journal interesting, and that it will serve as a valuable source of scientiﬁc information.

Acta Polytechnica is a scientific journal published by the Czech Technical University in Prague. The main title, Acta Polytechnica, is accompanied by the subtitle Journal of Advanced Engineering, which more precisely defines the scope of the journal. Acta Polytechnica covers a wide range of engineering topics, physics, and mathematics. Our aim is to be a high-quality multidisciplinary journal publishing the results of both basic and applied research. We place a strong emphasis on the quality of all published papers. The journal also serves as a bridge between basic research in the natural sciences and applied research across all technical disciplines. The innovative research results published by young researchers or postdoctoral fellows, along with high-quality papers from the international scientific community, reflect the strong position of the Czech Technical University in the World University Rankings. We hope you find our journal interesting and that it serves as a valuable source of scientific information.

《Acta Polytechnica》是由布拉格捷克科技大学出版的科学期刊。期刊的主标题为《Acta Polytechnica》，副标题为《先进工程期刊》，更精确地定义了期刊的范围。该期刊涵盖广泛的工程主题、物理学和数学。我们的目标是成为一个高质量的多学科期刊，发表基础研究和应用研究的成果。我们强调所有发表论文的质量。期刊还应作为自然科学基础研究与所有技术学科应用研究之间的桥梁。由年轻研究人员或博士后发表的创新研究成果，以及来自国际科学界的高质量论文，反映了捷克科技大学在世界大学排名中的良好地位。我们希望您会发现我们的期刊有趣，并且它将成为您获取科学信息的宝贵来源。

Study of non-stationary cutting processes in power skiving

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Journal Info

Category	Quartile
ENGINEERING, MULTIDISCIPLINARY	3