DOI: 10.18503/1995-2732-2026-24-1-69-74
Abstract
Problem Statement (Relevance). Quality parameters of the surface layer, in particular surface roughness, are standardized design documentation. This makes it mandatory to provide them further during the manufacturing process of machine parts and assemblies. Drilling pump cylinder units are no exception. Actuating surfaces of their units are subject to increased requirements for surface roughness. Boring is used as a finishing method for such parts. At the same time, an important issue is the appointment of cutting modes, which should provide the required surface quality parameters. When processing materials with special properties, the problem of the lack of recommendations for cutting modes arises. This problem can be solved either through experimental research or using theoretical calculations. This paper provides justification for the possibility of using theoretical dependencies to assign cutting modes when processing materials with inverse hardness distribution. Objectives. The research is aimed at developing an approach to determine the cutting modes at finishing of materials with inverse hardness distribution, which allow to provide required parameters of surface quality. Methods Applied. The paper uses methods of mechanical engineering technology, cluster analysis, approximation. Originality. Based on calculations using theoretical formulas that take into account the features of the surfaces roughness formation, technological cutting modes are determined that can be used in the final turning of parts made of materials with inverse hardness distribution. Result. In the course of the work, calculations have been made of the arithmetic mean deviation of the profile, which is in the form of components generated by the kinematics and geometric parameters of the cutting process, vibration processes in the technological system, roughness of working surfaces of the tool and elastic deformations. The calculation has been made taking into account the peculiarities of the processed material (the inverse nature of the hardness distribution). Subsequent experimental verification has shown the consistency of the results obtained. Based on the use of cluster analysis, mode values have been determined that provide the required level of quality. Practical Relevance. As a result of the studies, recommendations have been obtained on the modes of mechanical processing of parts that are made of materials with inverse hardness distribution. The advantage of using the obtained results in practice is the versatility of the apparatus used. Theoretically, cutting modes can be determined when processing with a tool with different geometry and holders. It is also possible to calculate when changing the configuration of a layer with inverse hardness distribution. Thus, the process of technological preparation of production can be improved
Keywords
treatment, surface quality, roughness, modes, provision
For citation
Nekrasov R.Yu. Determination of the Treatment Modes of Mud Pump Cylinder Liners that Ensure the Required Surface Quality. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2026, vol. 24, no. 1, pp. 69-74. https://doi.org/10.18503/1995-2732-2026-24-1-69-74
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