圆形倾斜薄壁件的激光熔覆成形  

Laser Cladding Formingof Round Thin-Walled Parts with Slope Angle

作　　者：王续跃[1] 王彦飞[1] 江豪[1] 徐文骥[1] 郭东明[1] 

机构地区：[1]大连理工大学机械工程学院精密与特种加工教育部重点实验室,辽宁大连116024

出　　处：《中国激光》2014年第1期78-83,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(50975041;51375073)

摘　　要：航空发动机燃烧室是由向外倾斜、直壁和向内倾斜3部分组成的圆形薄壁件。面向燃烧室结构的圆形薄壁件,依据偏移无支撑熔融粉末不塌陷的临界条件和单道熔覆层高度建立了熔覆成形倾斜角度数学模型,研究了激光熔覆向内倾斜和向外倾斜圆形薄壁件的偏移量、成形高度和倾斜角度,并进行了试验验证。研究结果表明在单层等偏移量条件下,几何形状的差异导致了向内倾斜圆形薄壁件较向外倾斜圆形薄壁件偏移总量较大、成形高度较小和倾斜角度较大,最后试验熔覆出了航空发动机燃烧室模拟件。研究结果为圆形薄壁件激光熔覆成形应用提供了理论和试验依据。Aero-engine combustion chamber is a round thin-walled part comprised of outward, upright and inward walls. For the characteristic of the round thin-walled parts, the mathematical models are developed based on the critical condition of offset melting powder without support and the cladding height of single-layer. Both inward and outward thin-walled parts are investigated for the offset value, forming height and angle of inclination. The results show that, due to the difference of geometry the inward thin-walled parts have longer offset, higher forming height and bigger slope angle than those of outward thin-walled parts under equal offset condition. The simulated parts of aero-engine combustion chamber are formed in the experiment. The results provide further understanding for laser forming round thin-walled parts both in theory and application

关 键 词：激光器 熔覆成形 圆弧薄壁件 倾斜角度 偏移量 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]