超声波在引线键合机变幅杆中的传递规律  

Ultrasonic transfer on horn of wire bonder

作　　者：王福亮[1] 李军辉[1] 韩雷[1] 钟掘 

机构地区：[1]中南大学机电工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2005年第6期1017-1020,共4页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金重大项目(50390064);国家重点基础研究发展计划("973"计划)项目(2003CB716202)

摘　　要：基于解析模型的方法,研究了超声波在热超声金丝球引线键合机变幅杆中的传递规律。在忽略变幅杆横向惯性效应,假定线弹性、无阻尼情况下,考虑变幅杆纵向微小振动,从一维变截面杆振动方程出发,建立热超声金丝球引线键合机复合变幅杆的动力学方程,推导它的频率方程,获得各阶振型。研究结果表明在变幅杆的各阶振型中,两端都是位移腹点,但是幅值不同,这也是变幅杆可以传递超声波的原因;夹持器应只有位于位移节点,才能为变幅杆系统提供支撑的同时不对超声波传递产生影响。Based on the analysis model, the ultrasonic transfer on the horn of wire bonder was studied. A dynamics equation of the composite transducer is established by the vibration equation of one dimension section changed pole, based on the following, the radial direction inertia and damping was ignored~ the material was liner elastic, only the axis direction micro-vibratlon was considered. The frequency equation and vibration model were also deduced. The results show that the ends of the transducer are always the maximum displacement positions, but the amplitudes are different, and this is the reason why the horn can transfer ultrasonic. The holder should be located on the node of the horn, so that it can support the transducer system and have no effect on the ultrasonic transfer.

关 键 词：超声波 变幅杆 引线键合 

分 类 号：TG453.9[金属学及工艺—焊接]