Klöfver, Jörgen

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A double-sided milling insert (30;30') for high feed milling of metal workpieces with a trigonal basic shape and comprising upper (31) and lower (32) faces facing in opposite directions and convex clearance surfaces (33) extending between the upper (31) and lower (32) faces. Each one of the faces comprises a recessed support surface (34A,34B), the support surfaces (34A,34B) being substantially parallel to each other, and having a cavity (35) therein for receiving a fastening means. Intersections of the convex clearance surfaces (33) with the upper and lower faces (34A,34B) form convex cutting edges (37A,37B;37A',37B') when seen in a plan view (fig. 1A) and a rake face (38) is provided adjacent the convex cutting edges (37A,37B,37a',37b'). Each convex cutting edge (37A,37B,37a',37b') is concave when seen in a side view (fig. 1b) and comprises a substantially straight cutting edge portion (39A,39B;39A',39B') on each side of a curved cutting edge portion (40A,40B;40A',40B') when seen in a plan view (fig 1a). A milling tool with a plurailty of such inserts and a method of high feed milling using this tool are also disclosed.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

The application concenrs a turning insert (1) for longitudinal turning of metal work pieces, wherein a nose cutting edge (5;5') slopes from a trailing cutting edge (6;6') in direction towards a leading cutting edge (7;7'). A turning tool comprising a turning insert (1) is also disclosed.

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A tool for machining a stacked material workpiece includes a tool body (23) comprising one or more helical flutes (25) extending to a forward end (27) of the tool body. Each helical flute has a width defined by a first cutting edge (29) and a second edge (31), a surface (33) of the flute adjacent the first cutting edge facing the forward end of the tool body and a surface (35) of the flute adjacent the second edge facing away from the forward end of the tool body. Each helical flute can include a first portion (37) having a first pitch angle and a second portion (39) having a second pitch angle different from the first pitch angle, the first portion extending from the forward end of the tool body to the second portion. A method for machining a stacked material is also disclosed.

Zusammenfassung wird geladen …

The present invention relates to a cutting tool having a tool holder body (14') having a shank portion (12') and a head portion (13'); an indexable cutting insert in a cutting insert seat comprising, a first convex wall (19') and a second convex wall and at least one bottom surface (16'), at which the cutting insert is supposed to abut, the cutting insert having a cutting edge and a clearance surface. The convex walls are situated on separate pins (21',23'), which are perpendicular or substantially perpendicular to each other when seen in a side view. The second convex wall is situated below the cutting edge.