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《China Mechanical Engineering》 2011-06
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Laser Cladding Forming of a Ramp Thin Wall with Variable Powder Feed Rate

Wang Xuyue Guo Huiru Xu Wenji Guo Dongming Wang Lianji Dalian University of Technology,Dalian,Liaoning,116024  
To prevent stair-step effect when layered forming parts using 2.5D slices,a geometrical model formed with variable thickness slices was developed.The research work performed with variable powder feed rate.The relationships between the geometrical precision of the parts formed by laser cladding forming(LCF) and the variable powder feed rate were investigated.While change of the powder feed rate every 2mm,the height of the cladding layer increases from 0.05mm to 0.46mm with the powder feed rate varying from 0.5g/min to 3.0g/min.The correct scanning paths were planned by simulating forming process of a ramp and a mountain shape parts through Matlab program.Using the scanning path obtained,a relatively smooth ramp of 316L stainless steel with a slope angle(3.37°) was formed through experiments.The results show the method with variable powder feed rate reduces the stair-step effect significantly and improves the geometrical precision of the ramp thin wall.
【Fund】: 国家自然科学基金资助项目(50975041 50775019);; 辽宁省科研项目计划资助项目(2008S054)
【CateGory Index】: TG174.44
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