光固化成型中液位控制系统的研究

Research on resin level control in stereolithography apparatus

光固化快速成型是一种新型的加工方法,成型精度是零件加工的关键,成型过程中,树脂液位波动会影响成型精度及制作过程的进行。针对光固化成型(SL)系统中树脂液位波动的问题,本系统中采用了一种通过激光非接触反射测量的方式检测并控制液位的方法。实践表明采用液位控制后,液位波动可以很好的控制,完全能够满足整机系统对液位控制0.003～0.014mm的精度要求。

Rapid prototyping(RP) is a novel fabrication technology,and the part accuracy is the key factor in the development of this technology.In the course of fabrication,the fluctuate of the resin level can influence the fabrication accuracy and process.Aiming at the fluctuate of the resin level,a method which uses the reflect of laser to inspect and control the resin level is applied in stereolithography(SL) system.According to the application of this method,the resin level fluctuation can be controlled very well,which can satisfy the 0.003～0.014mm accuracy requirement of resin level control.