Papers by Keyword: Metal Cutting

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Authors: Yue Feng Yuan, Wen Ying Zhang, Xing Chang
Abstract: Cutting force experiments in turning aluminum-silicon alloy were carried out with cement carbide tool YG8. Experimental formulae of cutting force, back force and feed force were determined based on multi-variable linear regression analysis, and they were verified by analysis of variance, the results showed that the regressed models could be used to predict cutting force under certain conditions.
Authors: Yue Feng Yuan, Wen Ying Zhang, Xing Chang
Abstract: Cutting force experiments in turning aluminum-silicon alloy ZL104 are carried out with cement carbide tool YG8. The influence of cutting parameters on cutting force is obtained based on single factor experiments. The results indicate that depth of cut and feed rate have great influence on cutting force while cutting speed provides just little impact.
Authors: Yue Feng Yuan, Wu Yi Chen, Wen Ying Zhang
Abstract: Tool wear experiments in turning titanium alloy Ti6Al4V in the solution-treated and aged condition were carried out; the influence rules of cutting parameters such as cutting speed, feed rate and cutting depth on the tool life were obtained. Experimental formula of tool wear was regressed based on multi-variable linear regression analysis, it could predict tool life under certain conditions.
Authors: H.X. Liu, R.D. Yang, X. Wang, B. Wu, Lan Cai
Authors: Wen Jun Deng, C. Li, Wei Xia, X.Z. Wei
Abstract: A coupled thermo-mechanical model of plane-strain orthogonal metal cutting including burr formation is presented using the commercial finite element code. A simulation procedure based on Normalized Cockroft-Latham damage criterion is proposed for the purpose of better understanding the burr formation mechanism and obtaining a quantitative analysis of burrs at exit. The cutting process is simulated from the transient initial chip formation state to the steady-state of cutting, and then to tool exit transient chip flow, by incrementally advancing the cutting tool. The effects of cutting condition on the non-steady-state chip flow while tool exit can be investigated using the developed finite element model.
Authors: Shi Jin Chen, Q.L. Pang, K. Cheng
Abstract: In this paper, a finite element model of a two-dimensional orthogonal metal cutting process is used to simulate the chip formation, cutting forces, stress, strain and temperature distributions. Two deformable parts are involved in this model: the workpiece and the cutting tool. To make the results of the simulation agree the orthogonal cutting test better, the separation surface between the chip and the machined surface is not predefined in this simulation. The chip-separation criterion is based on the Johnson and Cook law. This work will help as a reference to tackle more complex cutting processes such as oblique and discontinuous cutting.
Authors: Gui Cheng Wang, Chun Yan Zhang, Hong Jie Pei, Yun Ming Zhu, Li Jie Ma
Abstract: Based on the metal cutting experiments, the forming model of feed direction burr is proposed in the paper, a physical parameter of determining the generating of typeⅠ feed direction burr — critical tool edge angle rI χ is given. And the main factors which influence rI χ are studied by the experiment, and related theory analysis is made. Furthermore, some new controlling methods and technology to restrain or decrease the feed direction burr in machining are developed.
Authors: Gui Cheng Wang, Chun Gen Shen, Hong Jie Pei, Yun Ming Zhu, Qin Feng Li, Hai Jun Qu
Abstract: Based on the orthogonal cutting experiments, the two side direction burrs in metal cutting were studied. In this study, the cutting model of two side direction burr formation and translation is established with plane stress-strain theory. The main laws of formation and change of burr in size and type in orthogonal cutting are revealed, and it is confirmed by experiment results, which first realizes control of the forming and change of the two side direction burr in metal cutting operation.
Authors: Hai Jun Qu, Gui Cheng Wang, Hong Jie Pei, Qin Feng Li, Yun Ming Zhu
Abstract: The cutting-direction burr is one of the important factors that influence the edge quality and performance of precision parts. The cutting-direction burr formation process is simulated with DeformTH3D. The mechanism of cutting-direction burr formation is analyzed in terms of the results of the simulation. The negative shear zone and initiation negative shear angle are discussed too. Study results show that the deformation of CDE is an important factor affect the cutting direction burrs’ size and shape.
Authors: Marta Oliveira, João P. Santos, Fernando G. Almeida, Ana Reis, João P. Pereira, Augusto Barata da Rocha
Abstract: This paper introduces a framework for the Ecodesign of sheet metal cutters, which targets the definition of a set of design guidelines for this type of machine-tools, based on the contribution of the main equipment sub-systems to the processing and environmental impacts associated to their electrical energy consumption. A comparative study of commercially available Laser cutting equipments, using CO2 or doped fiber as the energy source, is described. Two parallel analysis of electricity consumption have been carried out: (1) the observation of CO2-Laser cutters usage, production modes and work conditions in real industrial environments, and (2) a comparison between these and a Fiber-Laser equipment, for a similar work order (material and thickness). The specific process energy with the different equipments was calculated, and confirms the importance of alternative technologies and practices for the energy efficiency of machining processes.
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