Novel tribological test rig prototype and primary results of experiments for additively manufactured test samples

Abstract

This paper presents a new design of tribological test rig - (TTR), reciprocating type, with a ramp characteristic typical of computer numerical control drives. The guide temperature is measured by a series of sensors, calibrated using the triple point of water and gallium melting point methods. The uncertainty of wear measurements is provided. Experiments showed that TTR gives repeatable results of measurements with respect to wear and temperature. Each experiment was performed under different conditions: dry sliding, dry sliding with intermissions, dry sliding with a temporarily increased payload, and sliding with lubrication and with silicon oil residue. Wear rate was determined to predict the wear and compare it with established methods. Normal force and payload were predicted for a set distance and assumed wear. A set of micro-photographs helped to determine the contact surface position.