基于喷射抛光实验研究结果的异形抛光实验台设计

Design of an Equipment Polishing Special Outline Objects Based on Jet Polishing Experiment Results

介绍了标准的液体喷射抛光实验,提出了近壁面附近固液两相流中的颗粒作用导致的流体摩擦剪切去除材料的机制假设,然后通过实验研究了抛光时间、样品表面初始粗糙度、喷头形状、喷射距离、喷射压力和pH值对抛光结果的影响。结果表明,抛光结果随时间趋于稳定并与初始粗糙度无关,圆形喷头比扇形喷头抛光效率高,喷射距离和压力影响一致,pH值越低影响越大。最后基于理论假设和实验结果设计了一个可以用于精密光学制造中异形表面抛光的实验装置。

The fluid jet polishing was introduced. A principle on the surface material removed by the fluid friction strain was proposed. Experiments were carried out and influence of polishing parameters such as polishing time, the initial roughness of workpiece,blow head shape,jet distance,jet pressure and pH value on the surface was studied. Results show that polishing results has nothing to do with initial roughuess of the workpiece;final roughness remains a steady value as the polishing time is long enough;circle shape blow head gives a higher polishing rate when comparing to a sector one;influence of polishing distance and pressure shows a uniform tendency ; the lower pH value, the stronger the effect is. An equipment employed jet polishing, which can be applied to polish special outline objects in precise machines, was designed based on the experiment results and the assumption of the material removal principle.