10 September 2009
PCD inserts with chipbreakers
WNT now offers a range of diamond tipped turning inserts with a choice of two precision chipbreaker forms, developed for the high performance machining of aluminium components.
Available in polycrystaline diamond (PCD) in fine and coarse grains sizes as well as synthetic diamond (CVD), the new range of inserts from is a major breakthrough in the machining of aluminium and other light alloys. Swarf can now be finely controlled, using either the CB1 or CB2 designated chipbreakers that are lasered into the diamond segment of the insert.
The CB1 chipbreaker style is ideal for finishing and superfinishing to a depth of cut between 0.05 and 1.5 mm. For semi-finishing and finishing operations, the CB2 geometry features a negative edge preparation, and produces high surface quality at depths of cut between 0.5 and 2.0 mm and operates best on solid workpieces under stable conditions.
The new inserts are available in a variety of ISO standard shapes, including CCGT, DCGT, RCGT, SCGT, TCGT and VCGT, and with a selection of corner radii between 0.1 mm and 1.2 mm. This, combined with the two chipbreaker forms, and three grades of diamond, ensure that the range suits the vast majority of turning operations.
The three grades of diamond are PCD, PCD-S and CVD-D. PCD features a fine grain structure to provide a sharper cutting edge and lower cutting forces, and is designed for fine finishing in materials with low levels of abrasiveness. PCD-S has a more coarse grain structure and is better suited to cut materials with higher levels of abrasiveness. Finally, the CVD-D grade is aimed at superfinishing due to its extremely fine grain structure and its ability to be formed to very close tolerances.
Author
Nicki McKenna
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WNT UK Ltd