摘要:
A cutting element for use in a cutting operation, comprising a cutting edge (CE) capable of cutting out material from a workpiece during the operation, to form therein a workpiece corner of angle alpha. There exists at least one view of the cutting edge in which a portion of the cutting edge is delimitable by a first (L1) and a second (L2) line oriented tangentially to the portion of the cutting edge portion at respective tangency points A and B. The lines form therebetween a cutting angle corresponding to the workpiece corner angle alpha and have a vertex 0. For a bisector of the cutting angle intersecting the portion of the cutting edge at the point C, the projection C of the point C of the portion of the cutting edge on a line OL passing through the vertex 0 perpendicularly to the plane of the one view is located between projections A1 and B′ of the respective points A and B of the portion of the cutting edge on the line OL.
摘要:
A cutting insert according to an embodiment of the present invention includes an upper surface, a side surface, and a first cutting edge located at an intersection of the upper surface and the side surface. The upper surface includes a pair of raised parts located opposite to each other with a perpendicular bisector of the first cutting edge interposed therebetween. A top of each of the pair of raised parts includes at least two protrusions oriented toward a direction along the perpendicular bisector in a top view. Each of the at least two protrusions includes a first protrusion located on a side closest to the perpendicular bisector, and a second protrusion which is located on a side further away from the perpendicular bisector than the first protrusion, and is located at a higher position than the first protrusion. A cutting tool including the cutting insert, and a method of manufacturing a machined product by using the cutting tool are also provided.
摘要:
In a cutting insert according to an embodiment of the present invention, an upper surface includes: a first concave groove which is continuous with a first cutting edge and extends along a longitudinal direction; a pair of second concave grooves which are respectively continuous with a pair of second cutting edges and extend along the longitudinal direction; and a pair of protruded parts respectively located between the first concave groove and the pair of second concave grooves. The pair of protruded parts are respectively continuous with an end surface cutting edge and are separated from each other by a larger distance therebetween as separating from the end surface cutting edge. A cutting tool with the cutting insert, and a method of manufacturing a machined product by using the cutting tool are also provided.
摘要:
In a cutting tool according to an embodiment of the present invention, at least one of an upper contact part of an upper surface of a cutting insert and an upper jaw of a holder and a lower contact part of a lower surface of the cutting insert and a lower jaw of the holder includes a first concave-convex surface and a second concave-convex surface. A distance d1 between tops of first convex parts adjacent to each other among a plurality of first convex parts of the first concave-convex surface is smaller than a distance d2 between bottoms of second concave parts adjacent to each other among a plurality of second concave parts of the second concave-convex surface in a sectional view perpendicular to the longitudinal direction of the holder. A method of manufacturing a machined product by using the cutting tool is also provided.
摘要:
The present invention relates to a tool for chip-removing machining, the tool comprising an insert holder (1), a cutting insert (3) for chip-removing machining, the cutting insert (3) being indexable and turnable, as well as means (5) for fixing the cutting insert (3) in an insert seat (7) of the insert holder (1). The invention also separately relates to a cutting insert for chip-removing machining as well as an insert holder. Characteristic of the tool according to the present invention is that the cutting insert (3) has a number of female parts (9) in both the base surfaces (4) thereof, and that the insert seat (7) has a number of male parts (20), which are integrated with the insert holder (1) and intended to cooperate with the female parts (9), and that the male parts (20) have certain flexibility in relation to the insert holder (1).
摘要:
The invention relates to a tool preferably for turning, and an insert therefor. The tool comprises a shank (11) upon which a loop-shaped outer disc - (12) is secured. An inner disc (13) is displaceably arranged between the arms of the outer disc (12). A screw (15) is arranged to push the inner disc (13) forwards relative to the outer disc during inward screwing, such that the fore ends of the inner disc force the lower face of the insert against the upper face of the shank (11). The insert (14) is provided with a hole which is arranged to be wedged up on a pin (36) extending in the hole during a forward movement of the insert at the same time as the pin and the hole comprise cooperating surfaces to force the lower face of the insert against the upper face of the shank.