Abstract
We can only form straight hole in a material by the conventional method, drilling and laser machining etc. First aim of this study is to develop 3D laser drilling method of acrylic resin. The feature of the method is using a steel ball and a laser beam. The steel ball was on acrylic resin board and heat by laser beam in an experiment. When acrylic resin was melt by the heat ball, the ball entered into the resin board and pass it through. Furthermore, we moved or rotated the acrylic resin board during the laser 3D drilling. As a result, we were able to accomplished 3D laser drilling of acrylic resin. On the other hand, Second aim of this study is to develop inner machining method of acrylic resin. We developed a new one in this paper. The feature is using Ultra-short pulsed laser processing and thermal process. A lot of micro crack were formed in a acrylic resin by the focused laser. Then, in thermal process, we found out a lot of micro crack were continued and expanded 3D space.
