Sandvik Ab

Sandvik Intellectual Property Aktiebolag

Lars-Erik Enquist

Peder Arvidsson

The invention relates to an indexable milling insert () having a polygonal basic shape, comprising four peripheral sides, which meet each other in pairs in one the one hand two acute corners (), and on the other hand two obtuse corners (). Between chip surfaces () on the top side of the insert and flank surfaces () along the peripheral sides, cutting edges () are formed, which individually comprise on the hand a major edge portion (), and, on the other hand, a rounded minor edge portion (), formed in connection with an acute corner (). Characteristic of the invention is the combination that the individual major edge portion () is slightly arched and that at least one connecting surface () is formed in the bottom side of the insert, of the type that comprises a plurality of parallel ridges spaced-apart by grooves having a cross-section-wise tapering shape and which are intended to co-operate with an analogous connecting surface adjacent to a chip channel in a cutting-insert-carrying milling head.

Indexable milling insert

An indexible cutting insert has a connecting surface formed by alternating parallel ridges and grooves. Each ridge is defined by a pair of flanks which converge in an outward direction. Each ridge includes a convexly curved surface portion for making line contact with a corresponding ridge of a support surface. The convexly curved surface is spaced from outer and inner ends of the respective flank.

Tool and toolholder for chip forming machining

A positional adjusting mechanism for a cutting insert in a tool for chip removing machining, preferably a milling cutter. The positional adjusting mechanism includes a hole formed in the tool body adjacent to the cutting seat which receives the cutting insert. A slotted bushing is mounted in that hole. An adjusting screw is received in the bushing to expand an upper end of the bushing. In the mounted state of the bushing in its hole, contact occurs between an upper part of the bushing and a support surface of the tool body which urges the bushing laterally in its hole to eliminate lateral play and thus stabilizes the bushing.

Growing community of inventors

D'Dorf, Germany

Lars-Erik Enquist