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

1.首先研制了脉冲压缩装置，并配备了响应速度为100 μ m，最大载荷为2.8kN的大功率压电驱动器。测量了输出位移（0 ~ 50mum）对输入电压（0 ~ 5V）的动态响应，尽管高压放大器在超过50hz的高频区响应变差，但结果令人满意。然后我们制作了微瓷/水颗粒注射装置，配备了注射筒和喷嘴。纯水注入稳定，证实了基本设计的合理性。在设备上配置混合装置后，瓷水混合颗粒的注入成为可能。注入的粉液比取决于驱动电压和波形。在接近最佳条件下，该比例约为60%。为了提高这一比率，使稳定的注射成为可能，似乎有必要进一步改进装置。所述注射装置与所述三维成型机相结合，形成所述三维形状。X-Y平面的扫描使我们的试验工作成为可能。不幸的是，观察到注入粒子与目标表面分离的现象。它来自于相对较低的粉液比，并且发现非常高的粉液比是实现稳定制造所必需的。

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.