Abstract:
Rotatable, solid cutting tool (100) with both right-hand spirals (120) and left-hand spirals (130), each of which includes an interrupted cutting edge having individual cutting edges (180, 190). Individual cutting edges (180) of the right hand spirals (120) are axially staggered helically around a circumference of a cutting portion (104) with respect to individual cutting edges (190) of the left hand spirals (130) so that, at each axial position along an axial length (Lz) of the cutting portion (140), each radial cross-section includes both at least one individual cutting edge (180) on a right hand spiral (120) and at least one individual cutting edge (190) on a left hand spiral (130). Individual cutting edges (180, 190) have a length along an outer circumference (160) of the cutting tool that is the same for individual cutting edges (180) of the right hand spiral (120) and individual cutting edges (190) of the left hand spirals (130). Cutting edges (180, 190) on differently handed spirals (120, 130) are both right-handed cutting edges (180, 190, see figures 1 to 8) or both left- handed cutting edges (280,290, see figures 9 to 16).
Abstract:
Schaftfräser zur spanenden Bearbeitung von Werkstücken umfassend einen Werkzeugspannbereich und einen sich von einer Stirnfläche (6) bis zum Werkzeugspannbereich (2) axial erstreckenden Werkzeugschneidenbereich (8) mit wenigstens zwei spiralförmigen Umfangsschneiden (10, 12), sowie parallel zu den Umfangsschneiden (10, 12) verlaufenden und diesen in Rotationsrichtung gesehen vorgeordneten spiralförmigen Spanräumen (14, 16) zum Wegführen von Spänen vom Werkstück, wobei wenigstens zwei Umfangsschneiden (10, 12) in Bezug auf ihre Spiralrichtung - rechts, links - gegenläufig spiralisiert und überlappungslos ausgebildet sind. Die Anmeldung sieht vor, dass die Beträge der Spiralwinkel (Θ 1 , Θ 2 ) der Umfangsschneiden (10, 12) in einem Bereich zwischen 16 Grad und 50 Grad liegen.
Abstract:
A compression milling cutter includes a shank and a front cutting portion that terminates at a leading end of the milling cutter. The front cutting portion has a first circumferential row of one or more insert receiving pockets proximate a leading end of the milling cutter, and a second circumferential row of one or more insert receiving pockets, each insert receiving pocket configured to receive a respective indexable cutting insert. The cutting insert mounted in the first circumferential row has a positive axial rake angle, A, and the indexable cutting insert mounted in an insert pocket of the second circumferential row has a negative axial rake angle, B. Because of the different axial rake angles, chips generated during a machining operation flow in opposite directions, thereby creating a compression zone disposed between the first and second circumferential rows. This compression zone replicates the cutting action of a solid end mill, particularly when machining fiber reinforced plastic materials.
Abstract:
Schaftoberfräser mit einem Grundkörper (1) mit einem Aufnahmeabschnitt (2) zur Einspannung in eine Fräsmaschine und einem Bearbeitungsabschnitt (3), an dem mehrere in Axial- und Umfangsrichtung versetzt angeordnete Schneiden (4, 5) vorgesehen sind wobei an dem Bearbeitungsabschnitt (3) in jedem Querschnitt senkrecht zur Axialerstreckung mindestens 3 Schneiden (4, 5) in Umfangsrichtung hintereinander angeordnet sind.
Abstract:
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 negative pitch angle and a second portion (39) having a second negative pitch angle different from the first negative pitch angle, the first portion extending from the forward end of the tool body to the second portion. The tool has only negative pitch angles. A method for machining a stacked material is also disclosed.
Abstract:
A method of milling a profile of a railway rail comprises: rotating a milling cutter including a plurality of face mounted cutting inserts mounted about a periphery thereof; milling a railway rail with cutting edges of the cutting inserts rotating in a predetermined plane corresponding to at least a portion of a desired rail profile while controlling the depth of cut of the cutting inserts; traversing the railway rail with the milling cutter while milling the railway rail; and controlling the speed of traverse of the milling cutter along the railway rail.