基于CCD法的应变式测力仪优化设计  

Optimal Design of Strain Dynamometer Based on CCD Method

作　　者：郭强 赵知辛[1] 薛旭东 潘晓阳 GUO Qiang;ZHAO Zhi-xin;XUE Xu-dong;PAN Xiao-yang(School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong Shaanxi 723000,China)

机构地区：[1]陕西理工大学机械工程学院,陕西汉中723000

出　　处：《组合机床与自动化加工技术》2021年第4期139-142,145,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：陕西省科技厅重点研发计划项目(2019GY-068);陕西省教育厅专项科研计划项目(16JK147)。

摘　　要：为了提高切削力测量结果的精准度,通过结构优化,提高了平行八角环测力仪在同等载荷下的应变,降低应变传递误差。通过有限元方法对平行八角环测力仪进行静力学及模态分析,以提高传感器贴片位置的应变和八角环测力仪结构一阶固有频率为优化目标,在材料强度及弹性变形等条件约束下,采用基于中心复合设计(CCD)的响应面优化方法,对平行八角环测力仪进行了结构优化设计。分析结果表明,与优化前相比,其贴片位置应变值提高了11.05%;结构一阶固有频率提高9.63%。优化结果较好地提高了切削力测量时传感器的灵敏度,并改善了原结构对切削振动的抗干扰的能力,使测力仪工作更平稳。In order to improve the accuracy of the cutting force measurement results,the strain of the parallel octagonal ring dynamometer under the same load is improved and the strain transfer error is reduced through structure optimization.The static and modal analysis of the parallel octagonal ring dynamometer is carried out by the finite element method.The optimization goal is to improve the strain of the sensor patch position and the first-order natural frequency of the octagonal ring dynamometer structure.Under the constraints of material strength and elastic deformation,the response surface optimization method based on the Central Composite Design(CCD)is adopted to optimize the structure of the parallel octagonal ring dynamometer.The analysis results show that,compared with that before optimization,the strain value of the patch position is increased by 11.05%,and the first-order natural frequency of the structure is increased by 9.63%.The optimization results improve the sensitivity of the sensor in the measurement of cutting force,improve the anti-interference ability of the original structure to cutting vibration,and make the dynamometer work more smoothly.

关 键 词：应变测力仪 优化设计 响应面优化 

分 类 号：TH162[机械工程—机械制造及自动化] TG506[金属学及工艺—金属切削加工及机床]