|
Abstract: A
high-resolution stereolithography system to build small objects with
intricate structure is developed. With this system, it is possible to
build component with the dimensions of 65 mm×65 mm×150 mm in resolution
of 0.02 mm. This newly developed apparatus consists of a He-Cd laser
with TEM00 beam quality, an improved optical scanning system,a novel
recoating system and a comprehensive control system. The improved
optical scanning system consisting of a beam expander, a galvanometric
scanner with automatic self-calibration and an f-theta lens can get a
laser light spot with the diameter of 0.012 mm on the focal plane. The
novel recoating system consisting a roller pump for accurately supplying
resin, a resin vat with an integrated high-resolution translation stage
and component building platform, and a scraper can obtain resin layers
with the thickness of 0.02 mm. The high-resolution SL system set-up is
described in detail. Examples of drip irritation emitters and other
small size parts fabricated by the system are shown.
Key words:Rapid
prototyping Stereolithography
Recoating High-resolution
CLC No: TG665
国家863高科技基金(2002AA2Z4081、2001AA242101)及全国优秀博士学位论文基金(200026)资助项目.
Received 20040118, received in revised form 20020040420
|