Abstract
The conventional analysis through tool life curves, the relationships between cutring speed and life, is not sufficient to investigate the characteristics of carbide tools.
After a great many tool life tests, it has been found out that many interesting characteristics can be detected by plotting the relationship between flank wear and cutting time on log-log paper. The relatiohship thus obtained consists of two straight lines and the critical wear which connects these lines. The slope of each line, its level, the critical wear and so on have their proper meanings and affect the tool life in their particular manners.
In this report, such a new type of analysis has been demonstrated in the case where FC27 (a high class cast iron) was machined with G seties carbide tools manufactured by five different makers.
