High Feed Turning: Roughing and Finishing with the Same Insert?

Abstract

The tools of multi-directional machining, having appeared in the recent years, have revolutionised turning operations. The chip removal of high feed roughing and finishing inserts is so specialised, that new formulas have to be introduced instead of those used so far. In this paper, the result of tests carried out up till now will be summarised; furthermore, a proposal will be made on the description, analysis and calculation of force demand of multi-directional inserts as well as the roughness of the surface being prepared during machining.

On the effects of cutting-edge angle on high-feed turning of Inconel 718© superalloy

“…13), using a wiper edge insert, with a double radius and a very low position angle Kr = 5°, it is possible to smooth the ridges with feeds of 0.3-0.4 mm/rev. This is the case of the PrimeTurning™ insert type B, not used in this work but used by Ráczi et al [39]. In that work, they observed the roughness Rz obtained with insert type B in roughing does not correlate with the theoretical formulas but with a second order equation (it was found to be about 11 times lower than using the theoretical formula).…”