A Reseatch on Optimum Condition of Gentle Wet Blasting

为了模拟微湿爆破的材料去除过程，新近开发了一个计算机程序。在选择了4种磨料和10种工作材料后，进行了大量的微湿爆破试验和计算机模拟。通过将试验结果与模拟结果进行比较，得出以下结论：1.当磨料为白刚玉(Wa)或碳化硅(C)，工作材料为5种金属时，模拟结果与试验结果较为吻合。因此，该模拟程序可用于预测爆破效果。2.当工作材料为软橡胶时，由于橡胶的弹性导致颗粒反弹，不会发生材料去除。合成树脂颗粒爆破，竟然在铸铁和铝的表面形成了一个凹坑。通过计算机模拟对这一现象进行了全面的预测。3.白刚玉颗粒爆破使天然金刚石的(111)面破裂，凹坑深度与模拟结果基本相同。4.对于平均直径为6.0-8.5微米的细目磨料爆破，最大凹坑深度的测试结果比模拟结果大20-200倍。为了揭示这种差异的原因，研究一直在继续。

A computer program has been newly developed in order to simulate a material removal process by gentle wet blasting. After 4 kinds of abrasive particle and 10 kinds of work material are chosen, many tests of gentle wet blasting and computer simulations are excuted. From the considerations based on the comparison of tested results with simulated ones, following results are obtained.1.When abrasive particle is white alundum (WA) or carborundum (C) and work materials are 5 kinds of metal, similated results are comparatively coincide well with tested ones. Therefore, the simulation program is available to predict the blasted result.2.When work material is soft rubber, material removal does not occur because of rebound of particles caused by rubber's elasticity. Blasting by synthetic resin particle unexpectedly makes a crater on the surface of cast iron and aluminum. This phenomenon is predicted thoroughly by the computer simulation.3.A (111) surface of natural diamond is fractured and removed by blasting of white alundum particle and the depth of crater is almost equal to the simulated result.4.In the case of blasting by fine mesh's abrasive particle having mean diameter of 6.0-8.5 mum, the tested result of the maximum depth of crater is lager 20-200 times than the simulated one. In order to reveal the cause of this defference, the research has been continued.