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cutting of nonmetallic materials using Nd:YAG laser beam

Chinese Physics B 2012年第4期21卷 286-289页

作者： Bashir Ahmed Tahir Rashid Ahmed M. G. B. Ashiq Afaq Ahmed M. A. Saeed Institute of Advanced Photonic Sciences Faculty of Science Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia Physics Department Faculty of Science Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia Centre for Solid State Physics University of the Punjab Lahore Pakistan

This study deals with Nd：YAG laser cutting nonmetallic materials, which is one of the most important and popular industrial applications of laser. The main theme is to evaluate the effects of Nd：YAG laser beam power besides work piece scanning speed. For approximate cutting depth, a theoretical study is conducted in terms of material property and cutting speed. Results show a nonlinear relation between the cutting depth and input energy. There is no significant effect of speed on cutting depth with the speed being larger than 30 mm/s. An extra energy is utilized in the deep cutting. It is inferred that as the laser power increases, cutting depth increases. The experimental outcomes are in good agreement with theoretical results. This analysis will provide a guideline for laser-based industry to select a suitable laser for cutting, scribing, trimming, engraving, and marking nonmetallic materials.

关键词： laser power cutting speed depth of cut nonmetallic material Nd:YAG laser

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Universal Method for the Prediction of Abrasive Waterjet Performance in Mining

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Engineering 2017年第6期3卷 888-891页

作者： Eugene Averin OOO Skuratovsky Experimental Plant Tula 300911 Russia

Abrasive waterjets （AWJs） can be used in extreme mining conditions for hard rock destruction, due to their ability to effectively cut difficult-to-machine materials with an absence of dust formation. They can also be used for explosion, intrinsic, and fire safety. Every destructible material can be considered as either ductile or brittle in terms of its fracture mechanics. Thus, there is a need for a method to predict the efficiency of cutting with AWJs that is highly accurate irrespective of material. This problem can be solved using the energy conservation approach, which states the proportionality between the material removal volume and the kinetic energy of AWJs. This paper describes a method based on this approach, along with recommendations on reaching the most effective level of destruction. Recommendations are provided regarding rational ranges of values for the relation of abrasive flow rate to water flow rate, standoff distance, and size of abrasive particles. I also provide a parameter to establish the threshold conditions for a material＇s destruction initiation based on the temporary-structural approach of fracture mechanics.

关键词： Abrasive waterjet Energy conservation approach depth of cut Fracture mechanics Threshold velocity Mining

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Comprehensive Study on Machinability of Titanium Composite

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Journal of Materials Science and Chemical Engineering 2016年第2期4卷 1-7页

作者： Basim A. Khidhir Department of Production Engineering & Metallurgy Technical College of Engineering Sulaimani Polytechnic University Kurdistan Region Iraq

Metal framework composites have higher mechanical properties in examination to metals over an extensive variety of working conditions. This makes them an alluring alternative in swapping metals for different building applications. The present review is a study on the influence of composite titanium on the cutting parameters, mechanical behavior, reinforcements, structure and nanostructure. This review will provide an understanding into selecting the optimum machining parameters for machining titanium composites. It’s also an attempt to give brief explanation by suitably machining the titanium composite which can be made reasonable.

关键词： Titanium Composite Reinforcement cutting Speed Feed Rate depth of cut Surface Finish Machinability

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Research on dynamic characteristics of high speed milling force based on discontinuous functions

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黑龙江科技大学学报 2015年第1期25卷 75-81页

作者： С.В.Биленко П.А.Саблин Чжан Дань Комсомольский-на-Амурегосударственныйтехническийуниверситет Россия681000

This paper begins with a consideration of the influence of feed per revolution upon the depth of a cut and the impact of the machining method on the direction of tool pressure average and subsequent description of efficient cutting directions and the methods for load cell orientation. The paper goes further into the key conclusions concerning the dependences of the cutting depth at high-speed milling as in the case of discontinuous functions. It ends with recommendations offered for positioning of load cells for cut-up milling and cut-down milling.

关键词： high-speed milling load cells tools tool pressure depth of cut

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Tribological Approach and Surface Quality Analysis of Stainless Steel for cutlery Applications after Surface Grinding

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材料科学与工程（中英文B版） 2020年第4期10卷 134-138页

作者： Mayara Fernanda Pereira Bruno Souza Abrão Rhander Viana Rosemar Batista da Silva School of Mechanical Engineering Federal University of UberlândiaAv.João Naves deÁvila2121UberlândiaMGCEP 38408-100Brazil University of Brasilia GamaBrasília-DFCEP 72444-240Brazil

In precision machining processes such as grinding,for example,analysis of machined surface is important one of most parameters to evaluate process *** important is to perform tribological analysis to understand chip formation and abrasive wheel wear,thus enabling manufacturing of components free of thermal *** grinding,due to high hardness of abrasive grains that remove material from workpiece in chip form and very low values of radial depth of cut,combination of low roughness values and tight dimensional tolerances is ***,the parameters involved in this process are determinant in surface quality that is primarily evaluated in terms of surface roughness and workpiece *** this work,surface roughness(Rt parameter)and scanning electron microscope(SEM)images of ground surfaces of the AISI 420 martensitic stainless steel samples were *** were carried out in surface grinding with a white aluminum oxide wheel and an environmentally-friendly semisynthetic water-soluble *** values of radial depth of cut(10μm and 25μm)were *** results showed that the highest roughness values,deeper grooves on the machined surfaces as well as poorer surface quality were obtained after grinding under the severest cutting conditions.

关键词： Grinding AISI 420 martensitic stainless steel trigological analysis depth of cut surface roughness SEM images

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