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

1.首先研制了响应速度为100 μ sec的大功率压电驱动器的脉冲压缩装置，最大负载2.8KN。输出位移的动态响应（0至50 μ m）对输入电压（0至5V）对高压放大器进行了测试，发现在50 Hz以上的高频区，高压放大器的响应变差，但仍能得到满意的结果一种用于陶瓷/水微粒的装置，其配备有注射缸和喷嘴。纯水的稳定注入证实了基本设计的合理性。在装置上配置混合装置后，陶瓷-水混合物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，该比率约为60%。为了提高这一比例并使稳定的注射成为可能，似乎有必要对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。在X-Y平面上的扫描使我们有可能进行试验工作。不幸的是，观察到注入的粒子从靶表面脱离的现象。这是由于相对较低的粉末/液体比率，并且发现非常高的比率对于实现稳定的制造是必要的。

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.