elements for roller guide

LIU Wen-wei1，YANG Jia-jun1，SHEN Jing-fang2，SUN Jian-li3，GUAN Jing-kai3

（1. School of Mechanical Science and Engineering，Huazhong Univerity of Science and Technology，

Wuhan 430074，China；

2. College of Sciences，Huazhong Agricultural University，Wuhan 430074，China；

3. Guangdong Gaoxin Height Precision Machinery Co. Ltd.，Jiangmen 529100，China）

Abstract：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 and the 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.

Key words：clamping elements；non-self-locking；amplificatory coefficient；friction coefficient