真空拾取器拾取动作响应时间与影响因素的研究

Response Time of Vacuum Sucking Discs

小型真空拾取器被广泛应用于轻质小型元器件的搬运机构之中。通常要求真空吸取器在执行搬运作业时其拾取动作尽可能迅速,其总响应时间为阀门动作、抽气降压和工件运动三部分响应时间之和。本文通过理论推导得到了工件运动响应时间的计算公式。借助fluent软件,模拟计算了抽气管道内的气体扩散降压流动过程,并讨论了真空管道长度与直径、储气罐容积等因素对抽气响应时间的影响。计算结论指出了提高真空拾取器响应速度的有效途径。

We addressed the impacts of various factors, such as the disc diameter, the length and diameter of the pumping pipeline,the valve size and the volume of gas gasholder,on the total response time of the vacuum sucking disc. The response time of the component＇s motion was analytically formulated. The diffusion and depressurized flow of gas in the pumping channel were numerically simulated with the commercially available software package, Fluent. The calculated results suggest several possible ways to shorten the response time of the vacuum sucking discs. For example, use of large sized valves and optimized length and diameter of the pumping pipeline, etc.