Papers by Keyword: Metal Cutting

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Authors: S.I. Petrushin, S.V. Gruby, A.A. Galeeva
Abstract: The paper considers the issue of optimum design of active part of metalcutting tools. Active parts are made of composite full-strength tool materials degrading uniformly. High-quality tools can be manufactured provided that the issue is sold.
310
Authors: Pei Yan, Xiang Su, Gang Wang, Yi Ming Rong
Abstract: As the development of new materials and high speed machining, cutting fluid becomes more and more important because of its functions of cooling, lubrication, corrosion protection and cleaning. The main purposes of cutting fluid are decreasing temperature, reducing friction, extending tool life and improving machining efficiency. In precision machining, high machined surface integrity is the most important. In this paper, a preliminary experimental study on effect of two different cutting fluids on milled surface quality of iron-base superalloy was taken. The surface morphology, roughness, micro hardness and residual stress of the machined surface were investigated. The results showed that the material properties and geometric characteristics of the machined surface were significantly affected by cutting fluid conditions. The effect of cutting fluid on machined surface quality and service performance will become an important research direction. This paper also suggests the main contents of the further research on effect of cutting fluids on machined surface.
61
Authors: A.V. Proskokov, S.I. Petrushin
Abstract: Most research on chip formation is based on free cutting with a single shear plane (the approach proposed by I.A. Time). No account is taken of the two-dimensional blade geometry nor of the three-dimensional character of the deformation source in the cut layer. It is assumed that the transformation of the cut layer into chip is confined to a very narrow zone adjacent to the shear plane. By contrast, constrained cutting is characterized by a conditional threedimensional shear surface, which is analogous to the shear plane.
304
Authors: Li Bao An, Chun Guang Lu
Abstract: Metal cutting indicates a specific category of processes in which unwanted material is removed from workpeice by single- or multi-point cutting tools for making products meeting prescribed specifications. Parameter optimization in metal cutting plays an important role in satisfying quality requirements of machined parts at low production cost or time. It requires optimal selection of cutting speed, feed rate, depth of cut, and the number of passes. A brief review of recent progress on the optimization of cutting parameters is introduced in the present work. Some new machining practices expending in recent years are involved including hard turning, dry cutting, high speed machining, machining of difficult-to-machine materials and composites. Modeling skills for creating optimization models and optimization techniques for solving optimal or near-optimal solutions are summarized and analyzed.
2218
Authors: Chun Lin Wang, Chong Hai Xu, Xiu Guo Xu
Abstract: The introduction and application of common finite element method (FEM) about the modern metal cutting theory research was stated emphatically. Graded self-lubricating ceramic tool materials was briefly introduced, and problems existed about simulating the metal cutting process using FEM are pointed out and discussed in this study.
683
Authors: Ming Cong, Jian Song
Abstract: In this paper, the turning process of 45# steel was simulated and analyzed based on the metal cutting finite element analysis software DEFORM-3D. The analysis result of cutting force was gained. However, due to some reasons of the software itself, there is noise data in analysis results. Thus, it’s needed to filter the data to extract useful information. The selected short-duration and steady-state cutting force data was processed with the use of six-sigma rule through mathematical statistics analysis. As a result, some bad data were rejected. Noise data was filtered out via wavelet analysis and the processed function curve of cutting force that changes with time during the whole cutting course was gained.
14
Authors: Jin Jing Ren, Jia Long Ren, Yan Wang, Feng Lei Yu
Abstract: From the perspective of clean production process, this paper summarizes the present research status of green cooling machining at home and abroad and analyzes the problems of coolant cooling during machining metal materials in traditional method and. The green cutting process tests using water vapor for cooling lubricant were done and the single-factor method was used. The cutting tests for the high-temperature alloy GH4169, titanium alloy TC4 and stainless steel Cr12 were done by the carbide cutting toolsunder th condition of distilled water, emulsion, water vapor for cooling lubricant and dry cutting. These tests results showed that in same process parameters, main cutting force Fc can be reduced by about 30%, 26% and 22% respectively when using water vapor for cooling lubricant than using dry cutting, distilled water and emulsion, while the cutting temperature T can be decreased by about 12%, 6% and 3% respectively.
2241
Authors: Shi Gang Wang, Yue Qiang Yu, Xi Bing Li
Abstract: Metal cutting is a very complex process of plastic deformation, and chip formation is a typical problem of large deformation, which involves the material nonlinearity, geometric nonlinearity and nonlinear state changes. Strain hardening model of Al 2024-T3 material is established based on elastic-plastic theory of material deformation. Finite element method is used in the analysis of the established model by ALGOR. The distribution of equivalent stress, yield stress and equivalent strain is concluded concretely in the metal cutting process in this paper.
383
Authors: Yong Yang, Cheng Jun Chen, Chang He Li
Abstract: Theoretical analysis and material experiment are employed to study the “single factor” material model. Based on the dislocation theory, an analysis shows that material model is deeply affected by temperature. By the least squares best fit to experimental data, material parameters are found. Experiment curves analysis and material parameters comparison show that the material parameters of “single factor” model of Mo-Cr cast iron are temperature dependent. Using the mathematical mapping between material parameters and temperature, the “single factor” material model of Mo-Cr cast iron is established, which is proven to be right by comparing with experimental measurements. This work provides a useful insight for understanding the material model and helps to develop further finite element simulation of high speed cutting process of Mo-Cr cast iron.
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