Temperature Dependence of the Friction Coefficient of Grease-Lubricated PTFE Linear Bushings Against Titanium Grade 5 Alloy (Ti6Al4V) and Life Tests Operating at High-Speed-Reference-Cited by-同舟云学术

Temperature Dependence of the Friction Coefficient of Grease-Lubricated PTFE Linear Bushings Against Titanium Grade 5 Alloy (Ti6Al4V) and Life Tests Operating at High-Speed

Published:2020-04-09 Issue:9 Volume:142 Page:
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Valiente-Blanco I.¹,Perez-Diaz J. L.¹,Perez-del-Alamo J. L.²,Diez-Jimenez E.¹

Affiliation:

1. Mechanical Engineering Area, Universidad de Alcalá, cta. Madrid-Barcelona km 33.6, 28805 Alcalá de Henares, Spain

2. MAG SOAR SL Avenida de Europa 82, 28341 Valdemoro, Spain

Abstract

Abstract Linear bushings are a compact and reliable solution for mechanisms requiring relative linear displacement between moving parts. In this paper, we report the dependence of the coefficient of friction (COF) of polytetrafluoroethylene (PTFE) grease-lubricated bushings against a Ti6Al4 V (grade 5) alloy shaft at high temperatures up to 200 °C, for a motion speed of up to 0.47 m/s and a load pressure of 0.8 MPa. A proportional sensitivity of the COF with temperature is observed due to the change in the viscosity of the grease lubricant. Results of survival tests are also reported demonstrating a total sliding distance of 3200 m without maintenance and a total a total sliding distance of 10,200 m without critical failure.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/doi/10.1115/1.4046708/6524584/trib_142_9_091701.pdf

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