Abstract:

The melt deposition molding （FDM） 3D printing technology was used to form ABS parts of acrylonitrile （A） ? butadiene （B）?styrene （S）. The influence of nozzle extrusion temperature and layer height on the surface quality of the parts was investigated. According to the different extrusion temperature and layer height printing process parameters， multi groups of parts with the same shape and size were prepared. The surface morphology data of the parts were collected and analyzed by using the shape measurement laser microscope. The change trend of the surface parameters such as S_a、S_z、S_tr，etc with the extrusion temperature and the layer height was obtained. The flatness was measured and analyzed by using three?coordinate measuring instrument， and the variation trend of flatness error with extrusion temperature and layer height was obtained.The influence of temperature and layer height FDM process parameters on the surface quality of ABS printing parts was revealed The law of influence. The experimental results show that extrusion temperature and layer height have an important influence on the surface forming and surface quality of the parts. Under the same other conditions， the extrusion temperature of 230~240 ℃ makes the surface roughness of the products obtained by FDM process the best，and the flatness is the best at 210 ℃； the smaller the layer height， the better the surface roughness of the parts，and the larger the layer height， the smaller the flatness of the part.

Key words: three?dimensional printing, fused deposition modelling, acrylonitrile butadiene styrene copolymers, surface topography