Page 38 - Iscar Article 2_2017
P. 38
High-Technology
Simplicity
A new standard of indexable
inserts: a carefully designed
complex shape for effective
cutting action
Cemented carbide indexable inserts are Effective machining demands constant rake and
an integral part of cutting tools today. relief angles along the cutting edge, which in
Cemented carbide inserts were introduced turn necessitate complicated contours of the top
in the early '60s and have substantially of the insert (and also bottom for double-sided
changed tool designs, putting tools with inserts) and its periphery. A land that strengthens
brazed carbide tips on the back burner. the cutting edge and a minor edge for better
Mechanical clamping of the indexable milling by ramping further increases the
inserts provided significant advantages design's complexity.
in productivity, efficient use of carbide The insert must ensure precise control of the flow
and tool maintenance. of chips produced by the cutting action, and so the
chip breaker on the rake face adjoining the cutting
Advances in technology and metallurgy edge must be specifically shaped.
have facilitated the development of indexable
inserts that are far more advanced than their This is particularly important for turning,
predecessors, and complicated shapes especially if a machined material produces
which have replaced the simple forms that long chips; here, the chip breaker controls
characterized inserts in the past. the direction of the chip flow so that the chip
overturns and breaks into smaller segments.
The shape of an insert is a key factor for cutting
geometry of a tool as a whole. For example, when Finding the optimal insert shape for efficient
milling, geometry variation by means of changing cutting and chip control is not a simple task,
the position of the insert in the tool is very limited, and tool manufacturers have leveraged new
and the results are far from optimal. technologies to develop successful solutions.
