正畸弓丝弯制特性分析及实验研究  

Bending Property Analysis and Experimental Study of Orthodontic Wires

作　　者：张永德[1] 蒋济雄[1] 

机构地区：[1]哈尔滨理工大学,哈尔滨150080

出　　处：《中国机械工程》2011年第15期1827-1831,共5页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50675054);黑龙江科技厅攻关计划资助项目(GC05A514)

摘　　要：对镍钛合金弓丝、β-钛合金弓丝、澳丝和国产不锈钢弓丝这4种正畸弓丝的弯制特性进行了分析。采用MSC.Marc有限元分析软件根据实际弯制方法建立弓丝弯制有限元模型并进行仿真分析,结合弯制实验得到4种正畸弓丝的回弹特性曲线,并对实验结果进行了对比。结果表明,镍钛合金弓丝、β-钛合金弓丝、澳丝和国产不锈钢弓丝这4种正畸弓丝的回弹性依次减小,回弹角随着弯制角度的增加而增大;有限元仿真结果和实验结果基本一致。采用弓丝弯制机器人在弓丝回弹特性的基础上进行弓丝弯制,固定夹具和移动夹具的距离t=2mm时的拟合曲线要优于t=10mm时的拟合曲线;因此在使用弓丝弯制机器人弯丝时要尽量减小固定夹具和移动夹具之间的距离。This paper analysed the bending properties of nickel steel wires,including domestic stainless steel wires,β-titanium alloy wires and Australia stainless steel wires.The finite analysis software MSC.Marc was used to model the process of orthodontic wires＇ bending combined with actual experiments.Then the paper compared the results and analyzed the errors.The results indicate that rebound angle of the four kinds of orthodontic wires is reduced sequencely,furthermore,rebound angle increases as bending angles＇ addition.The finite element analysis results are basically the same with the experimental ones.An orthodontic wires bending robot was used to bend wire based on orthodontic wires＇ bending properties.The fitting curve obtained when the distance of the fixed fixture and mobile fixture is two millimeters is much better than the fitting curve obtained when the distance is ten millimeters.So the distance between the fixed fixture and mobile fixture should be as small as possible when using orthodontic wires to bend wires.

关 键 词：正畸弓丝 有限元分析 弯制特性 弓丝弯制机器人 

分 类 号：TG135[一般工业技术—材料科学与工程] TP242[金属学及工艺—合金]