Abstract:
The comparative thermography analysis of temperature during machining by turning was presented. For the tests
cast iron EN-GJL 250 and stainless steel 1.4301 were used. The machining by turning was performed with
the TNMG 220408HS PC9030 and TNMA 220208 NC6210 cutting inserts design for machining that kind
of materials. The temperature was measured on the machined material and on the surface of the cutting insert.
The temperature distribution was performed during 3 subsequent turning passes; therefore, the coolant was not
used during machining. The emissivity of TNMG 220408HS PC9030 and TNMA 220208 NC6210 cutting inserts
was performed. In the case of EN-GJL-250 cast iron, the tests have shown that due to safety reasons (the lack
of the safety cover in the working area of the lathe) it was impossible to perform the measurements at the highest
assumed machining speed of 339.1 m/min. The higher average temperatures in the material were recorded for
1.4301 steel, even though the machining process was performed at a much lower machining speed than in the case
of EN-GJL-250 cast iron. The average cutting insert temperature when turning EN-GJL-250 cast iron was
approximately 100°C higher than for 1.4301 steel.
