摘要
金属带锯床锯切进给过程的研究对实现锯切负载预测与精确锯切控制有着至关重要的作用,其中进给液压驱动和摩擦导致的爬行现象尤其需要研究并解决.针对金属带锯床液压驱动锯切进给系统,首先,通过阀控非对称缸的非线性动力学分析,建立了锯切进给过程的锯架液压驱动的动力学模型;其次,结合Stribeck摩擦模型,建立了进给液压缸活塞与内壁间的非线性摩擦力模型;最后,综合两部分模型,提出了金属带锯床锯切进给过程的非线性动力学模型.仿真和锯切进给实验表明,提出的模型较好地描述了锯切进给过程,并给出了产生爬行现象的条件.
The performance of the feeding process has a crucial effect on both cutting force forecasting an accurate control for metal bandsaw machine.The characteristics such as friction and hydraulic drive of the feeding process can cause the stick-slip phenomenon.According to the feeding system of the metal band sawing machine with hydraulic drive,the dynamics model of the saw frame with hydraulic drive is established firstly based on the nonlinear dynamics analysis of valve-controlled asymmetrical cylinder.Secondly,the nonlinear fiction model between the hydraulic cylinder piston and inner wall is established combining the Stribeck friction model.Finally,synthesizing the forward two models,the nonlinear dynamics model of metal band sawing machine during the feeding process is proposed.Results of simulation and experiment show that the proposed model well descripts the feeding process,and presents the generation conditions of the stick-slip phenomenon.
出处
《杭州电子科技大学学报（自然科学版）》
2016年第5期62-67,72,共7页
Journal of Hangzhou Dianzi University：Natural Sciences
基金
国家自然科学基金资助项目(51375129)
