The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
M Mori - One of the best experts on this subject based on the ideXlab platform.
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Workpiece and Tool Handling in Metal Cutting Machines
CIRP Annals - Manufacturing Technology, 2006Co-Authors: Jürgen Fleischer, B. Winfough, Berend Denkena, M MoriAbstract:Recently many researchers have focused substantial efforts on understanding the Cutting process in mechanics, capability and design. Advances in machine performance with research towards high performance Cutting (HPC) and high speed Cutting (HSC) have led to improved tool properties and application of advanced materials. Because of that, primary processing time has been successfully reduced, which leads to the need for re-focusing on reduction of secondary processing time. Minimizing the time for workpiece and tool changing, re-positioning, workpiece handling, and tool handling systems shift attention towards improvement of these systems which are currently installed in various Metal Cutting machine tools. This paper presents an approach for the assessment of the technological effectiveness of workpiece and tool handling systems for Metal Cutting machine tools, gives an overview of the state of the art of these systems, surveys recent developments and elaborates requirements for future systems.
Viktor P. Astakhov - One of the best experts on this subject based on the ideXlab platform.
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Metal Cutting Mechanics
2019Co-Authors: Viktor P. AstakhovAbstract:Introduction General Reasons for Studying Metal Cutting History of Metal Cutting Basic Problems Requiring Solution Parallel-Sided Deformation Zone Theory The Role of Engineering Plasticity in Metal Cutting Studies Application of the Slip Line Method to the Analysis of the Shear Zone Model with Parallel Boundaries Analysis of Plastic Deformation in Metal Cutting Strain Rate in Metal Cutting Work Material Consideration What Has to Be Predicted According to the Existing Theories Review of Attempts Made to Predict Shear Flow Stress What Has to Be Predicted in Reality? Experimental Verification The Cause of Significant Discrepancy in Reported Results Nature of Plastic Deformation in Polycrystalline Materials Fracture of Ductile Polycrystalline/Fracture Strain Determination Mechanism of Fracture in Metal Cutting Fracture Strain Determination System Approach Observation Part of Existent Studies on Chip Formation System and Assemblage Cutting System Finite Element Simulation General Computational Details of Simulation Applications of FEM Results and Discussions Methodology of Experimental Studies in Metal Cutting Similarity Methods in Metal Cutting Temperature Measurements in Metal Cutting Cutting Force Measurements Appendix: Cutting Tool Geometry A1 - Tool-in-Hand System A2 - Tool-in-Machine System (Setting System) A3 - Tool-in-Use System A4 - Determination of the Uncut Chip Cross-Section for Non-Free and Non-Orthogonal Cutting Conditions
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Importance of Temperature in Metal Cutting and Its Proper Measurement/Modeling
Materials Forming Machining and Tribology, 2018Co-Authors: Viktor P. Astakhov, José OuteiroAbstract:This chapter reveals the modern objective of Metal Cutting processes as increased productivity of multiple machining operations. It is discussed that the only feasible option to increase productivity is increasing the Cutting speed. The chapter further analyzed the known attempt to increase the Cutting speed showing that the Cutting temperature is the major constraint in such an endeavor. It is explained the notion of the optimal Cutting temperature explaining that its wide acceptance is limited by lack of a physical explanation of its nature. The physical essence of the optimal Cutting temperature is revealed. The place where the temperature in Metal Cutting should be measured is explained. The basic methods of measuring temperatures in Metal Cutting are discussed. Infrared measuring technology is explained in details including its physical principle, advantages and limitations, and use of very short-wave cameras.
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Practical applications of the “energy–triaxiality” state relationship in Metal Cutting
Machining Science and Technology, 2017Co-Authors: Yalla Abushawashi, Xinran Xiao, Viktor P. AstakhovAbstract:ABSTRACTMost of the energy spent on Metal Cutting is due to the unavoidable plastic deformation of the layer being removed during its transformation into the chip. Based on the new principle of Metal Cutting being a purposeful fracture process, the dominant parameter that controls this process in orthogonal Metal Cutting (OMC) is the triaxiality state. Therefore, the chip triaxiality state in the deformation zone can be correlated to the energy of the unwanted plastic deformation for a particular Cutting configuration. This article investigates this type of correlation by changing the Cutting tool geometry. A series of finite element (FE) simulations were performed for various tool rake angles shows a strong relationship between the stress triaxiality state parameter in the deformation zone and the required Cutting force components.
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Screening (Sieve) Design of Experiments in Metal Cutting
Management and Industrial Engineering, 2015Co-Authors: Viktor P. AstakhovAbstract:This chapter discuses particularities of the use of DOE in experimental studies of Metal Cutting . It argues that although the cost of testing in Metal Cutting is high, there is no drive to improve or generalize the experimental results. It explains that full factorial design of experiments and the most advanced group method of data handling (known as GMDH) method allow accurate estimation of all factors involved and their interactions.
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Editorial: tribology at the forefront of study and research on Metal Cutting
International Journal of Machining and Machinability of Materials, 2007Co-Authors: Viktor P. AstakhovAbstract:A clear distinction of the Metal Cutting tribology and a short description of the author?s personal vision on the place, role and importance of this field of knowledge are presented. As discussed, a great amount of this energy required by the Cutting system for its existence is spent over the tribological interfaces in Metal Cutting, namely, on the tool-chip, tool-workpiece and chip-workpiece interfaces. System specifics of Metal Cutting tribology are discussed. This paper sets the objectives and direction for the future work on Metal Cutting tribology. This paper highlights the major features of the current Special Issue.
Jürgen Fleischer - One of the best experts on this subject based on the ideXlab platform.
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Workpiece and Tool Handling in Metal Cutting Machines
CIRP Annals - Manufacturing Technology, 2006Co-Authors: Jürgen Fleischer, B. Winfough, Berend Denkena, M MoriAbstract:Recently many researchers have focused substantial efforts on understanding the Cutting process in mechanics, capability and design. Advances in machine performance with research towards high performance Cutting (HPC) and high speed Cutting (HSC) have led to improved tool properties and application of advanced materials. Because of that, primary processing time has been successfully reduced, which leads to the need for re-focusing on reduction of secondary processing time. Minimizing the time for workpiece and tool changing, re-positioning, workpiece handling, and tool handling systems shift attention towards improvement of these systems which are currently installed in various Metal Cutting machine tools. This paper presents an approach for the assessment of the technological effectiveness of workpiece and tool handling systems for Metal Cutting machine tools, gives an overview of the state of the art of these systems, surveys recent developments and elaborates requirements for future systems.
Pm Braiden - One of the best experts on this subject based on the ideXlab platform.
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The effect of reverse shear on the failure of Metal Cutting tools
Journal of Materials Processing Technology, 1991Co-Authors: J.f.l. Chan, Pm BraidenAbstract:Abstract Finite element models of a Metal Cutting tool have been developed to examine the reverse shear mechanism. The stress distributions at both tool/work engagement and disengagement have been studied. Direct and shear loads have been applied both separately and simultaneously. A reverse shear as well as a diminishing direct loading during disengagement have also been modelled. It was found that under certain Cutting conditions reverse shear could have very strong influence on the stress distribution within a Cutting tool. However, it was also found that mechanical stresses alone would not have caused unexpected tool failure for a properly designed Metal Cutting tool. Thermal stresses generated upon tool/work engagement and disengagement also play a very significant part in influencing the performance of Metal Cutting tools. The combined effect of a built-up-edge and reverse shear on tool performance has also been discussed.
A. P. Kuznetsov - One of the best experts on this subject based on the ideXlab platform.
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Precision and efficiency of Metal-Cutting machines
Russian Engineering Research, 2016Co-Authors: V. V. Bushuev, A. P. Kuznetsov, F. S. Sabirov, V. S. Khomyakov, V. V. MolodtsovAbstract:Approaches to improving the design of Metal-Cutting machines are discussed. The most important problems relating to the precision, thermal processes, dynamic modeling, and diagnostics of Metal-Cutting machines are considered.
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Trends in research on Metal-Cutting machines
Russian Engineering Research, 2016Co-Authors: V. V. Bushuev, A. P. Kuznetsov, F. S. Sabirov, V. S. Khomyakov, V. V. MolodtsovAbstract:This review covers the current state and prospects for the design of Metal-Cutting machines, including numerically controlled machines. The characteristics of common mechatronic modules are considered. The structure of Metal-Cutting machines is outlined, and means of complying with operational requirements are presented.
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Thermal assessment of Metal-Cutting machines
Russian Engineering Research, 2015Co-Authors: A. P. Kuznetsov, V. M. Utenkov, A. G. ShirshovAbstract:The formulation of models for the assessment of processes in the components of Metal-Cutting machines is considered. The thermal, elastic, electric, and hydraulic processes in the machine parts may be described in the same general terms. On that basis, their mathematical models will be analogous.
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Patterns of thermal behavior of Metal-Cutting machines
Russian Engineering Research, 2011Co-Authors: A. P. KuznetsovAbstract:The basic methodological principles relating to the thermal behavior of Metal-Cutting machines are outlined. Standard formulas for the relative displacement of the shaping tools are presented and analyzed.
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Thermal behavior of components in Metal-Cutting machines
Russian Engineering Research, 2011Co-Authors: A. P. KuznetsovAbstract:The thermal behavior of components in Metal-Cutting machines is considered, and corresponding formulas are derived. Characteristics of standard components are determined, and their ranges are noted.
