3D打印UV与ABS材料仿生表面摩擦学性能

Tribological properties of bionic surface of 3D printed UV and ABS polymer materials

对在干摩擦条件下仿生表面对摩擦副的作用机理与影响规律进行了研究.实验以光敏树脂(UV)和丙烯腈-苯乙烯-丁二烯(ABS)2种高分子材料为样品,利用3D打印技术分别加工出具有仿生表面与光滑表面的试样.干摩擦条件下,在摩擦磨损试验机上进行球-面摩擦磨损实验,测量UV与ABS的摩擦系数与磨损量,并用激光共聚焦显微镜与体视荧光显微镜观察磨损表面.研究结果表明:载荷与转速的改变会引起摩擦系数与磨损量的变化.UV仿生表面在3 N载荷与200 r/min转速、5 N载荷与200 r/min转速和3 N载荷与400 r/min转速工况下平均摩擦系数分别为0.534、0.598和0.642;在5 N载荷下相较3 N磨损量提高了40.0%,在400 r/min转速下相较200 r/min磨损量提高了185.5%.ABS仿生表面在3 N载荷与200 r/min转速、5 N载荷与200 r/min转速和3 N载荷与400 r/min转速工况下平均摩擦系数分别为0.336、0.346和0.378;在5 N载荷下相较3 N磨损量提高了2.69%,在400 r/min转速下相较200 r/min磨损量提高了12.5%.UV样品为粘着磨损,而ABS样品黏着磨损为主,伴随有磨粒磨损.

The mechanism and influence law of bionic surface on friction pair under dry friction condition were studied.Two kinds of macromolecule materials,photosensitive resin(UV)and acrylonitrile-styrene-butadiene(ABS),were used as samples.The samples with bionic and smooth surfaces were fabricated by 3D printing technology.Under dry friction condition,ball-disk friction and wear experiments were carried out using a reciprocating friction and wear tester.The friction coefficients and wear quantities of the two materials were measured.The worn surfaces were observed by focusing microscope and stereofluorescence microscope.The results showed that the change of load and speed caused the change of friction coefficient and wear quantity.The average friction coefficients of UV bionic surfaces at 3 N load and 200 r/min speed,5 N load and 200 r/min speed and 3 N load and 400 r/min speed were 0.534,0.598 and 0.642,respectively,which were 40.0%higher than that of 3 N under 5 N load and 185.5%higher than that of 200 r/min at 400 r/min speed.The average friction coefficients of ABS bionic surfaces at 3 N load and 200 r/min speed,5 N load and 200 r/min speed and 3 N load and 400 r/min speed were 0.336,0.346 and 0.378,respectively,at 5 N load.The wear loss of the lower phase is 2.69%higher than that of 3 N and 12.5%higher than that of 200 r/min and 400 r/min speed.The adhesion wear of UV samples was mainly abrasive wear,while that of ABS samples was mainly abrasive wear.