Sandvik Intellectual Property Ab

Sandvik Ab

Sandvik Aktiebolag

Nordic Brass Gusum Ag

Nordic Brass Gusum Ab

Inge Svenningsson

Jan H Johansson

Göran Pantzar

Ralf Lehto

Lars-Ola Hansson

Mikael Lundblad

Lars-Gunnar Wallström

Magnus Åström

G&ouml;ran Pantzar

&angst;ke Sjolander

Jan Nilsson

David Öhlund

Magnus Åström

The present invention refers to a brass alloy, wherein AlOis present in the alloy in the form of ceramic nanoparticles. Furthermore the invention refers to a method for production of the brass alloy.

Brass alloy comprising ceramic alumina nanoparticles and having improved machinability

A milling tool intended for chip-removing machining includes a basic body rotatable around a geometrical centre axis and peripherically spaced-apart, detachable cutting inserts, which separately are securable in insert pockets adjacent to chip channels formed in the basic body. The individual cutting insert have at least one edge formed between a chip surface on the top side of the cutting insert and a clearance surface along the periphery side of the cutting insert, and the individual insert pocket is arranged to secure the individual cutting insert in a position in which the chip surface is inclined in relation to the centre axis while forming a positive angle of inclination.

Milling tool, a cutting insert for milling tool as well as a solid milling tool

A rotatable cutting tool for chip-removing machining includes a basic body which defines a center axis of rotation. Cutting inserts are detachably mounted in respective cutting seats that are formed in the basic body. Each insert has a square shape and includes first and second pairs of mutually parallel major cutting edges, four corners, and four wiper edges. Each wiper edge is situated between a major cutting edge and a respective corner. The wiper edges are shorter than the major cutting edges and are inclined relative thereto, wherein an imaginary extension line of the wiper edge forms a first acute angle with the respective major cutting edge as the insert is viewed in a direction perpendicular to the top surface. The cutting seats are arranged to orient the inserts wherein an axially forwardmost wiper edge of each insert lies in a plane oriented perpendicular to the axis, and wherein a radially outermost wiper edge of each insert is oriented parallel to the axis.

Rotatable cutting tool with cutting inserts for chip removing machining

A rotatable milling tool includes a body, and at least one set of circumferentially spaced cutting members that are intersected by a common plane oriented perpendicularly to a longitudinal center axis of the body. The set of cutting members includes at least three cutting members mounted in an envelope surface of the body. Each cutting member includes a flank surface and a cutting edge disposed adjacent to the flank surface. Each cutting edge has axially spaced apart ends. The flanked surface of each cutting member forms a clearance angle with a tangent extending through the respective cutting edge. The flank surface of the insert has a larger clearance angle than the flank surfaces of at least two other inserts in the same set. During a milling operation, the cutting members with smaller clearance angles tend to produce stability and vibration-free rotation, while the cutting member having the larger clearance angle ensures a high precision (smooth) machining.

Milling tool having cutting members with different clearance angles

A twist drill includes a shank which defines a longitudinal center axis and has a helical, chip-transporting flute formed therein. A cutting insert is arranged at a front end of the flute. The insert includes a body forming a cutting edge and a flank surface arrangement situated behind the cutting edge. The flank surface arrangement includes first and second flank surfaces extending at respective first and second acute angles relative to a reference plane which contains the center axis. The sizes of the first and second acute angles are different from one another. In one embodiment, each of the first and second flank surfaces intersects the cutting edge. In a second embodiment, only the second flank surface intersects the cutting edge, with the first flank surface extending from a rear end of the second flank surface.

Twist drill having multiple flank surfaces for each cutting edge

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Sandviken, Sweden

Inge Svenningsson