The high quality prostheses fabrication on compound machining by CAE

近年来，激光焊接有望连接金属零件，特别是钛假体装置。然而，由于激光焊接存在着难以根据操作人员的技能控制质量、焊接过程中出现不规则收缩、设备成本高等缺点，目前在日本的牙科实验室工作中尚未普及。即使我们知道精密铸造是最流行的牙科金属假体的制造方法，我们认为，当我们单独制造假体的各个部分，然后通过激光焊接连接在一起时，我们称之为减少劳动力。本研究采用实验开发的数控电火花加工与激光焊接相结合的方法，研究了应用于植入体上部结构复合材料贴面钛骨架的制备工艺。在基础研究的基础上，采用两级光束能量设置和焊接时的数控辐照转弯，实现了框架的良好配合。结论激光焊接技术在义齿修复中具有广阔的应用前景，特别是在数控工艺下，但在质量控制方面还需要对能量和照射路径进行管理。

Recently laser welding has been expected to connect metal parts especially titanium prosthetic devices.However, since there are several drawbacks such as the difficult quality control based on the operator's skill, the occurrence of irregular shrinkage during welding, and the high cost of the equipment, laser welding has not been popular in dental laboratory works in Japan yet.Even we understand precision casting is the most popular fabrication method of dental metallic prostheses, we believe we call reduce labor when fabricating parts of the prostheses individually followed by connecting together by laser welding.In this study we investigated this procedure to apply to fabricate the titanium framework for composites veneering of implant superstructure with combining numerically controlled wire electric discharge machining and laser welding experimentally developed.Excellent fit of the frameworks was achieved when applying the two-stage beam energy setting and the NC irradiating turn during welding based on the fundamental studies.We conclude laser welding is promising for applying dental prostheses especially under numerically controlled procedure, but we have to manage energy and irradiating path for the quality control.