GEOMETRICAL MODIFICATION OF COATED CARBIDE INSERTS FOR IMPROVED PERFORMANCE IN HIGH PRODUCTION FACE MILLING

The role of some geometrical modifications of coated carbide inserts o n the improvement of their performance in high production face milling has been investigated. The principal geometrical features investigate d were: (i) edge-bevelling for controlled contact cutting effects, hig her edge-strength and better heat dissipation; (ii) intermediate cutti ng edge for higher tip-strength and better heat dissipation; (iii) wid e planishing edge for good surface finish. The role of these different geometrical parameters of the inserts on cutting forces, wear and sur face finish in machining low carbon steel has been studied, Some benef its of edge-bevelling have been observed. Mathematical relationships f or the cutting forces have also been developed.