多齿分度盘动态分度误差分析  

Analysis on dynamic dividing error of teeth dividing table

作　　者：黄琦[1] 娄志峰[1] 马勇[1] 王晓东[1] 

机构地区：[1]大连理工大学精密与特种加工教育部重点实验室,大连116023

出　　处：《振动与冲击》2012年第9期172-175,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金(50905026);国家863高技术计划基金(2008AA042506)

摘　　要：多齿分度盘是机械领域分度精度最高的元件,它通过上下齿盘啮合完成分度。在多齿分度台上下齿盘啮合时,牙齿间不可避免的存在着冲击,影响分度精度。根据动力学的相关理论,采用ANSYS/LS-DYNA对上下齿盘建立弹性动力学模型,分析啮合牙齿的弹性体动力响应及对分度精度的影响,并实验验证。经过分析,当上齿盘下落高度为1mm,在文中中间位置下落,分度误差为0.08″;左侧位置下落,分度误差为0.53″。实验得出,上齿盘下落高度为1 mm,在中间位置下落,分度误差为0.09″;左侧位置下落,分度误差为0.55″。经过分析和实验可知,分度盘上齿盘由中间位置下落,且降低下落高度,可以减小齿面间冲击,提高分度精度。Teeth dividing table operates its dividing function by meshing between upper and lower tables,which has the highest dividing accuracy in mechanical field.The impact existing inevitably between teeth affects dividing precision when upper and lower tables is meshing.According to the dynamics theory,elastic dynamics model of upper and lower tables were developed by ANSYS/LS-DYNA.Elastic dynamic responses of meshing teeth were analyzed numerically and then verified by experiment.Numerical results show that,with 1mm falling height of upper table,dividing error is 0.08″ when the upper plate falls in the middle position and dividing error is 0.53″ when the upper plate falls from the left side.Experimental results show that the corresponding dividing errors are 0.09″and 0.53″ respectively under the same conditions mentioned above.The results also illustrate that the impact between teeth becomes smaller and the dividing precision gets higher when the upper table falls in the middle position and the falling height is lower.

关 键 词：多齿分度盘 动态分度 精度 ANSYS/LS-DYNA 

分 类 号：TH71[机械工程—测试计量技术及仪器]