摘要
为提高搅拌摩擦焊电主轴的设计水平,获得最佳的搅拌摩擦焊接质量,运用有限元理论和模态频率灵敏度理论对搅拌摩擦焊电主轴进行动态特性分析。将电主轴密度、泊松比、弹性模量、轴承刚度以及结构参数作为设计变量,电主轴模态频率作为响应,通过APDL语言建立搅拌摩擦焊电主轴的参数化有限元模型,利用半分析灵敏度方法,计算响应对各设计变量的灵敏度,并进一步对电主轴的动态特性进行优化。研究结果表明:该电主轴结构设计合理、满足要求。电主轴密度和弹性模量对其模态频率的影响较大,结构参数和轴承刚度对电主轴模态频率的影响取决于焊接质量所需的电主轴转速。通过对电主轴进行优化设计,在提高模态频率并保证焊接质量的前提下,减轻了电主轴质量。
In order to improve the design level of the motorized spindle for friction stir welding and obtain the best quality of friction stir welding, finite element and model frequency sensitivity theory were applied to a- nalysis of the dynamic characteristics of the motorized spindle. The density, Poisson＇s ratio, elastic mod- ulus, bearing stiffness and structural parameters of spindle are taken as design variables, and the spindle frequency is taken as a response. The parametric model of motorized spindle for friction stir weld- ing was built by APDL language. The sensitivity of the response to each design variable was calculated by the semi analytical sensitivity method, and the dynamic characteristics of the motorized spindle were further optimized. The results show that the design of the motorized spindle is reasonable and meets the requirement. The density and elastic modulus of spindle have great influence on the model frequency, and the influence of structural parameters and bearing stiffness on the model frequency of the motorized spindle depends on the speed of the motorized spindle required by the welding quality. Through the opti- mization design of the motorized spindle, the quality of the motorized spindle is reduced under the prem- ise of improving the model frequency and ensuring the quality of welding.
出处
《制造技术与机床》
北大核心
2017年第12期97-102,共6页
Manufacturing Technology & Machine Tool
基金
河南省高等学校重点科研项目(17B460001)
安阳市科技计划项目
安阳工学院校科研基金项目(YJJ2016010)
安阳工学院博士科研启动基金项目(BSJ2017009)
关键词
搅拌摩擦焊电主轴
焊接质量
模态频率
灵敏度
friction stir welding motorized spindle
welding quality
model frequency
sensitivity
