Friction modelling in metal cutting

• Published in: Wear Vol. 260; no. 3; pp. 310 - 318
• Main Author: Childs, T.H.C.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 10-02-2006; Amsterdam Elsevier Science; New York, NY
• Subjects: Applied sciences; Exact sciences and technology; Friction; Friction, wear, lubrication; Machine components; Mechanical engineering. Machine design; Metal machining; Modelling; Friction; Metal machining; Modelling; Solid lubricant; Solid inclusion; Low speed; Chip formation; Machining; Turning; Metal; Experimental study; Modeling; Cutting; High speed; Metal machining: Friction; Self lubricating material; Tribology; Chip tool interface
• ISSN: 0043-1648; 1873-2577
• DOI: 10.1016/j.wear.2005.01.052

This paper reviews the experimental evidence for what is the nature of the friction contact between chip and tool during continuous chip formation and the historical development of friction models. It considers three separate circumstances of turning: at low speeds when lubricants can reduce friction by partial penetration of the chip–tool contact; at high speeds when thermal softening can provide self-lubrication; and at intermediate speeds when in some cases solid-lubricating inclusions from the work material can segregate in the chip–tool contact. It demonstrates, through numerical simulation of the turning process, shortcomings in a commonly used friction model and proposes an improved formulation.