摘要:
A cutting insert and an indexable insert-type cutting tool includes a cutting edge (6A) formed on each of a pair of side ridge portions of at least one of the side faces, wherein an insert main body (1) is formed in the shape of having front-back inversion symmetry which is 180° rotationally symmetrical with respect to a line of symmetry (N) passing through the center of the side faces; a flank face adjacent to the cutting edge (6A) is formed on the side face in the vicinity of each of the pair of polygonal faces (2); each of the flank faces is formed in the shape of a twisted face; the pair of side ridge portions on which the cutting edge (6A) is formed intersect each other in such a manner that the second corner portion (B) of one side ridge portion protrudes outside the other side ridge portion.
摘要:
A cutting insert, a cutting tool and method of manufacturing a machined product. The cutting insert includes: upper and lower surfaces; a side surface; a cutting edge; and a rake portion on the upper surface. The cutting edge includes major and minor cutting edges that are convex toward outside of the main body portion. The minor cutting edge has a curvature radius smaller than a curvature radius of the major cutting edge. The rake portion is inclined and approaches the lower surface as moving from the major cutting edge toward inside of the main body portion and is located along the major cutting edge. An inclination angle of the rake portion becomes smaller as moving from a part continuous with one end of the major cutting edge toward a part continuous with center of the major cutting edge.
摘要:
An insert comprises an insert main body having an upper surface and a plurality of side surfaces, a cutting edge located between both ends of a ridge which is between at least one side surface among the side surfaces and the upper surface, a high-positioned portion located at one end of the ridge, and a low-positioned portion located lower in the thickness direction of the insert main body than the high-positioned portion and located at the other end of the ridge. The cutting edge comprises a first flat cutting edge having substantially the same height as the high-positioned portion, and a tilted cutting edge having a height decreasing from the high-positioned portion toward the low-positioned portion. On at least the one side surface, at least one groove extends from the side surface to the upper surface to divide the cutting edge by the groove, and at least the one groove is formed at a region including an intersection of a first extension line formed by imaginarily extending the first flat cutting edge with a second extension line formed by imaginarily extending the tilted cutting edge. This enables reduction in the occurrence of vibration during cutting, and the chipping.
摘要:
A double-sided cutting insert with a plurality of indexable convex cutting edges can have a top face and a bottom face, at least three convex cutting edges on each face connected by at least three nose corners, at least three peripheral side surfaces extending from each face toward a virtual middle plane; and a common lateral seating surface on each peripheral side surface. Each convex cutting edge can have at least a curved cutting edge region, and can further have a primary substantially straight cutting edge region intermediate the curved cutting edge region and the nose corner. Each peripheral side surface can further have a primary planar facet associated with the primary substantially straight cutting edge, and each face may also be single-handed in same direction. Additionally, in various embodiments, the top and bottom faces of the cutting insert may be formed such that they are twisted or rotated with respect to each other. Further, additional cutting edges, edge regions, and/or surfaces may be included in a cutting insert in various embodiments. In such embodiments, the cutting insert or inserts may provide a powerful ramping function during milling operations.
摘要:
A cutting edge exchange type cutting tool includes a cutting insert and a body having a chip seat to which the cutting insert is attached. The cutting insert has a first inclined surface part and a second inclined surface part. In the first wall surface, a first abutting part which abuts on the first inclined surface part is formed. In the second wall surface, a second abutting part which abuts on the second inclined surface part is formed. The first and second inclined surface parts are formed with flat surfaces. The first inclined surface part is inclined at an obtuse angle to the bottom surface. The second inclined surface part is inclined at an acute angle to the bottom surface.
摘要:
A cutting insert according to an embodiment of the present invention includes an upper surface; a lower surface; a side surface located between the upper surface and the lower surface; at least one concave part extending in a thickness direction in the side surface, and having one end thereof located at the upper surface; and a cutting edge which is located at an intersection region of the upper surface and the side surface, and is divided into a plurality of divided cutting edges with the at least one concave part interposed therebetween. The upper surface includes a first raised part located inwardly of the at least one concave part, and a plurality of second raised parts respectively located inwardly of the plurality of divided cutting edges. The plurality of the second raised parts are located inward compared to one end of the first raised part close to the cutting edge in a top view. A cutting tool including the cutting insert, and a method of manufacturing a machined product using the cutting tool are also provided.
摘要:
A cutting tool comprises: a first cutting insert having a first side surface for interconnecting a first upper surface and a first lower surface, a first cutting edge located at the intersection between the first upper surface and the first side surface, and a first groove section located in the first side surface and extending to the first upper surface so as to divide the first cutting edge; a second cutting insert having a second upper surface, a second side surface, a second cutting edge located at the intersection between the second upper surface and the second side surface, and a cutting edge reinforcing section located on the second upper surface at an end thereof which is positioned on the second cutting edge side; and a holder for mounting thereto the first cutting insert and the second cutting insert. The first cutting insert and the second cutting insert are mounted to the holder in such a manner that the first cutting edge and the second cutting edge are located on the outer peripheral side of the holder, that the first lower surface and the second upper surface are in proximity to each other, and that the rotation trajectories of the cutting edge reinforcing section and the first groove section are partially superposed on each other.
摘要:
A cutting insert is provided with an upper surface, a lower surface, side surfaces for interconnecting the upper surface and the lower surface, cutting edges located at the intersections between the upper surface and the side surfaces, and grooves located in the side surfaces, extending from the upper surface toward the lower surface, and dividing the cutting edges. Each of the grooves is provided with a first edge and a second edge which are located at the edges of the groove in the width direction thereof and extending from the upper surface toward the lower surface. In a side view, the first edge has a first separated section located on the upper surface side and, as the first edge extends toward the lower surface, separated away from a reference line which passes through the midpoint of the groove in the width direction thereof and is substantially perpendicular to the lower surface. Also, in the side view, the second edge has a second separated section located on the upper surface side and separated away from the reference line as the second edge extends toward the lower surface.
摘要:
Disclosed is a cutting tool for milling works which employs a cutting insert. The cutting tool for milling works employs a cutting insert. By forming a concave nick cutting edge on the lateral surface of the cutting insert, it may cut a chip in a short form in case of high depth of cutting to shorten the effective cutting edge, so as to reduce a friction and a cutting resistance, thereby increasing the life span of the cutting tool as well as to facilitate a chip disposal and reduce the cutting resistance, so as to increase a feed rate at a high depth of cutting, thereby enhancing the productivity of the cutting works. By forming concave recesses on the upper and lower surfaces of the cutting insert it may reduce the cutting resistance between the chip being short cut by the concave nick cutting edge and the upper and lower surfaces. By forming a concave nick cutting edge at a major cutting edge of the cutting insert it is possible to perform a nick cutting edge function without deforming the seat lateral surface of a seat portion to couple the cutting insert with a cutter body.
摘要:
The invention relates to a milling head for milling chamfers, especially for a mobile chamfer miller, comprising successive seats for blanking dies, said seats having a position in which the blanking dies with a leading edge angle of between 40 and 75° operate respectively on average with a positive effective cutting angle of at least 6° and a clearance angle of at least 6°, and are provided for a border comprising blanking dies with a staggered arrangement of the cutting edges, such that respectively only one cutting edge length of 15 mm, preferably 12 mm, at the most, is active. Said measures increase the cutting performance of the milling head. The reduced cutting edge length can be formed on a long blanking die instead of using a shorter blanking die, in such a way that the cutting edge is interrupted by cavities or other e.g. flat triangular recesses on the surface of the blanking die. The staggered arrangement is then comparatively small.