Friction Performance of Wedge-shaped Texture on the Surface of 3D Printed ABS Materials

In order to fabricate the complex and asymmetric wedge-shaped triangular texture and verify its antifriction effect, acrylonitrile-styrene-butadiene (ABS) polymer material was used as the sample, and 3D printing technology (FDM) was used to process the sample with wedge-shaped pitting surface and the sample with smooth surface. The rotary pin-disk friction and wear test was carried out on the MRTR-1 friction and wear testing machine, and the wear morphology of the working surface was observed with the type microscope. The internal pressure of the lubricating oil film was simulated by the Fluent finite element software, and the simulation results were verified. The results show that, compared with the smooth and non-textured samples, the surface wedge textured samples have different degrees of friction reduction effect, and the friction reduction effect is the most obvious when the size is 2. 7 mm and the area occupancy is 15. 94%. The friction coefficient of the clockwise wedge texture is lower than that of the counterclockwise wedge texture under the loading conditions of 10 N and 5 N, with the size of 2. 7 mm, the fixed speed of 150 r/min and the loading conditions of 10 N and 5 N. This is because in the direction of lubricating oil flow, the asymmetric texture also presents different fluid dynamic pressure effects. Clockwise wedge texture has higher fluid dynamic pressure and higher bearing capacity than counterclockwise wedge texture, so the friction reduction effect is better. Theoretical support and technical guidance are provided for the preparation and application of complex-shaped surface textures.