DENTAL CAD/CAM TECHNOLOGY BASED ON THE MICRO PILE-UP METHOD

1.首先研制了响应速度为100Musec、最大负载为2.8kN的大功率压电式脉冲压缩装置，测量了脉冲压缩装置的输出位移(0~50um)对输入电压(0~5V)的动态响应，虽然高压放大器在50 Hz以上的高频段响应变差。2.在此基础上，研制了带有喷油缸和喷嘴的陶瓷/水微粒注射装置。注入稳定的纯净水，印证了基础设计的合理性。在装置上安装混合装置后，瓷水混合颗粒的喷射成为可能。3.喷射的粉液比取决于驱动电压和波形。在接近最佳的条件下，该比例约为60%。为了提高这一比例，使稳定的注射成为可能，似乎有必要对该装置进行进一步的改进。4.注射装置与3D造型机相结合，形成3D形状。X-Y平面的扫描使我们的试验工作成为可能。不幸的是，观察到了注入粒子脱离靶面的现象。这是因为粉液比相对较低，研究发现，要实现稳定的生产，必须有很高的粉液比。

1.Firstly we made the impulse compression apparatus equipped with the powerful piezo-actuator of response speed 100 musec, maximum load 2.8kN.The dynamic response of the output displacement (0 to 50mum) against the input voltage (0 to 5V) was measured and found satisfactory one although the response on the high voltage amplifier become worse in the high frequency region over 50Hz.2.Then we made the injection apparatus for micro porcelain/water particles equipped with injection cylinder and the nozzle. The stable injection of pure water confirm the soundness of the basic design. After furnishing the mixing device to the apparatus, the injection of the porcelain-water mixture particle become possible.3.The powder/liquid ratio of the injected depends on the driving voltages and the wave forms. In the nearly optimum condition, the ratio is about 60%. To increase this ratio and make the stable injection possible, further improvement on the apparatus is seemingly necessary.4.The injection apparatus is combined with the 3D modeling machine, to form the 3D shape. The scanning in X-Y plane made us possible to made the trial work. Unfortunately the phenomena that the injected particle is detached from the target surface is observed. It comes from the relatively low powder/liquid ratio, and it was found that the very high ratio is necessary to realize the stable manufacturing.