Internal Temperature Distribution of the Carbide Fly Cutting Tool

Abstract

The temperature distribution inside the carbide tool of a face-milling fly cutter was calculated from the previously obtained data of the tool chip interface temperature during the cutting period in machining a medium carbon steel. Effects of the cutting speed, tool material grade, use of water-miscible cutting oil, work width and cutter diameter on the surface and internal tool temperature are discussed in the present study. The ratio of the cutting time to the period of a cycle (referred to as the cutting time ratio) is a decisive factor for the internal temperature pattern, and it also determines the cooling rate of the tool surface during the non-cutting time. A modified non-cutting time is proposed as a unique parameter which determines the tool-chip interface temperature during the non-cutting time when different work widths or cutter diameters are used.