新型气动式滚柱直线导轨副钳制器的力学分析  

Mechanical analysis of a new type of pneumatic clamping elements for roller guide

作　　者：刘文威[1] 杨家军[1] 沈婧芳[2] 孙健利 关景开 

机构地区：[1]华中科技大学机械科学与工程学院,湖北武汉430074 [2]华中农业大学理学院,湖北武汉430074 [3]广东高新凯特精密机械股份有限公司,广东江门529100

出　　处：《机电工程》2014年第12期1578-1582,共5页Journal of Mechanical & Electrical Engineering

基　　金：广东省教育部产学研结合项目(2012B091000078);中央高校基本科研业务费专项资金资助项目(2013QC022)

摘　　要：为了解决高速高精直线电机应用于机床上时滚动直线导轨缺乏制动功能的问题,将气动制动技术运用于直线导轨的制动系统中,设计了一种新型气动式钳制器。首先,分析了钳制器的结构特点及工作原理;然后,通过对内部结构的受力分析,给出了输出力及增力系数的计算公式,并确定了其不自锁的条件。最后,通过对各个参数的分析,得出了在润滑条件和无润滑条件下楔形角、滚动摩擦系数及滑动摩擦系数对增力比的影响关系。研究结果表明,在无润滑条件下得到的增力系数范围为7.46-10.76,有润滑条件下得到的增力系数范围为17.72-18.38。计算结果与试验值的比较结果显示,两者基本吻合,验证了力学分析的正确性,从而为设计较大增力系数的新型气动式滚柱直线导轨副钳制器提供了理论依据。In order to solve the problem of lacking braking capacity of linear rolling guide system when linear motor was applied in the machine tools, a new type of pneumatic clamping device was developed by using pneumatic braking technology. The structural characteristics and operating principle of clamping element were analyzed at first. Then, according to the mechanical analysis, computation formula of the output force andthe amplificatory coefficient were obtained, meanwhile, its non-self-locking conditions were also identified. Finally, parameters such as wedge angle, friction coefficient were analyzed, and the influence of these parameters on amplificatory coefficient under the conditions of lubrication and lubrication-free were obtained. The results indicate that amplificatory coefficient is obtained as 7.46-10.76 under the condition of lubrication and 17.72-18.38 under the condition of lubrication-free. Some calculated results are verified by the experimental data, which show they are reasonable, thus provide theoretical basis for design pneumatic clamping element for roller guide with bigger amplificatory coefficient.

关 键 词：钳制器 不自锁 增力系数 摩擦系数 

分 类 号：TH122[机械工程—机械设计及理论]