Use of rapid prototyping technology in complex plastic structures. Part II. Impact of operating conditions on functional properties of polymer harmonic drives

The influence of operating conditions on physical and mechanical properties of tooth surface in the flexspline of a harmonic drive was investigated. 3D printed test models were made from poly(acrylonitrile--co-butadiene-co-styrene) copolymer and from poly(lactic acid) and subjected to the accelerated UV aging test and to bench tests

Jacek Pacana; Rafal Oliwa

2019

Scholarcy highlights

  • The influence of operating conditions on physical and mechanical properties of tooth surface in the flexspline of a harmonic drive was investigated. 3D printed test models were made from poly(acrylonitrile--co-butadiene-co-styrene) copolymer and from poly(lactic acid) and subjected to the accelerated UV aging test and to bench tests
  • The degree of degradation of the plastics was determined with IR spectroscopy
  • That the ambient conditions and exploitation of harmonic drives do not affect the value of softening point and hardness
  • The atomic force microscopy analysis indicated that the sides of teeth were smoother as a result of their cooperation
  • The values of Ra parameter in the areas examined decreased from 110.0 to 54.6 nm and from 23.9 to 17.0 nm for the gear wheels made of ABS and PLA, respectively
  • The Derjaguin--Muller-Toporov modulus of surfaces was decreased from 10.0 to 3.0 GPa and from 4.5 to 2.2 GPa in the gear wheels made of ABS and PLA, respectively
  • The atomic force microscopy imaging provide evidence for destructive effects of UV radiation and elevated humidity, confirmed by IR spectroscopy

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