不等厚切片分层熔积制造复杂金属零件  

Layered-deposition manifacturing complex metal parts by unequal thickness slicing

作　　者：胡帮友[1,2] 张海鸥[1] 蒋疆[1] 王桂兰[2] 

机构地区：[1]华中科技大学数字化制造装备与技术国家重点实验室,湖北武汉430074 [2]华中科技大学塑性成形模拟与模具制造国家重点实验室,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2011年第2期57-60,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划资助项目(2007AA04Z142);国家自然科学基金资助项目(50475134);华中科技大学博士后基金资助项目(0128100030)

摘　　要：在大倾角曲面或悬空特征等复杂形状熔积零件的制造中,应用等厚度切片技术来进行制造往往达不到成形性要求和实际使用性能.为解决这种问题,提出不等厚切片技术来改善制造效果.基本思想是沿着零件几何渐变生长方向的法平面进行等距切片,切片法向始终保持与零件几何特征的渐变方向一致.这种切片方法考虑了零件的几何形状的变化,始终保持最优的生长方向,因而制造出的零件无论在外部形貌还是内部力学性能上都可以得到最优效果.将该方法应用在复杂渐变结构零件的精确数字化熔积制造中,取得了满意的实验结果.When deposition manufacturing is applied to metal parts with complex structure such as cantilever or gradient surface, equal thickness slicing can not meet the target requirements for forming and employing. To solve this problem, unequal thickness slicing was presented to improve the quality of deposited metal part. The basic idea of this technique is equal distance slicing along the normal plane of the growth direction of part, so the normal vector of each slice always agrees with gradual changing direction of geometrical feature of metal parts. This method can optimize the growth direction according to the change on shape of metal parts. Thus, the figuration and mechanical performance of depositing metal part can be both improved obviously. This approach has been successfully applied to metal parts with complex structure such as gradual solenoid.

关 键 词：金属零件 熔积制造 不等厚切片 再切片 机器人熔丝熔积 

分 类 号：TP391.73[自动化与计算机技术—计算机应用技术]