Evaluation Measures of Lubricity by Means of Compression-Twist Type Friction Testing Machine

Nozomu Kawai, Kuniaki Dohda, Yoshihiro Nakashima

Research output: Contribution to journalArticlepeer-review

Abstract

A compression-twist type friction testing machine has been developed to establish the fundamental friction testing method for metal forming. This machine has been devised to change easily contact pressure, sliding velocity, sliding distance and combination of friction pairs. Two indenter types, that is, ones with different contact length along sliding direction and a ring-shape-indenter, are employed and several mineral oils are tested using mild steel and alloy tool steel SKD 11 as the friction pairs. Surface appearances of testpiece and tool during sliding are observed by a SEM and a profile projector. The variations of friction coefficient during sliding are understood based on the surface appearance. Thus, new measures to evaluate lubricity in boundary lubrication, oil film strength and antiweldability are proposed.

Original languageEnglish (US)
Pages (from-to)354-360
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series C
Volume52
Issue number473
DOIs
StatePublished - Jan 1 1986

Keywords

  • Alloy Tool Steel
  • Forming
  • Friction Coefficient
  • Friction Testing Apparatus
  • Mild Steel
  • Mineral Oils
  • Tribology

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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