Tool and cutting insert for milling
First Claim
1. Cutting insert adapted to be mounted in a pocket of a milling body to be rotated in a milling machine,the cutting insert comprising:
- an upper side constituting a chip surface,a lower side constituting a support surface,first and second major sides each intersecting the upper side, andfirst and second minor sides each intersecting the upper side and each interconnecting the first and second major sides;
the insert further including a pair of cutting edges formed by the intersection of the upper side, the first major side and the first minor side,the pair of cutting edges comprising a major cutting edge extending along the first major side, and a minor cutting edge extending along the first minor side,the major cutting edge and the minor cutting edge intersecting one another to form a cutting corner,the major cutting edge sloping to form an acute angle with the lower side;
the first major side and the first minor side forming a ledge structure underlying the pair of cutting edges, the ledge structure including a minor ledge underlying the minor cutting edge, and a major ledge underlying the major cutting edge, the minor ledge and the major ledge each forming an outwardly facing clearance surface, the minor ledge having a height less than a remaining height of the first minor side, and the major ledge having a height less than a remaining height of the first major side;
the major ledge extending along at least a portion of the length of the first major side, a lower end of the major ledge being stepped outwardly with respect to a plane defined by a portion of the first major side disposed below the major ledge, a plane defined by the clearance surface of the major ledge being in non-intersecting relationship with a remaining portion of the major side disposed therebelow, whereby the clearancesurface of the major ledge can be ground independently of the remaining portion of the major side,the minor ledge extending along only a portion of a length of the respective minor side, a lower end of the minor ledge being stepped outwardly with respect to a plane defined by a portion of the minor side disposed below the minor ledge, a plane defined by the clearance surface of the minor ledge being in non-intersecting relationship with a remaining portion of the minor side disposed therebelow, whereby the clearance surface of the minor ledge can be ground independently of the remaining portion of the minor side;
each of the major sides having a recess formed therein.
1 Assignment
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Accused Products
Abstract
A cutting insert for milling comprises two major sides, two minor sides, and upper and lower sides. At least one pair of cutting edges is formed at the transition of the upper side with a major side and a minor side of the cutting insert. The upper side constitutes a chip surface, and the major and minor sides constitute clearance surfaces. Each pair of cutting edges comprises a major cutting edge extending along the major side, and a minor cutting edge extending along the minor side. The major and minor cutting edges intersect in the area of a cutting corner. The cutting corner is provided inside an imaginary extension line of a major part of the minor side. The major cutting edge slopes such that it forms an acute angle with the lower side. Each pair of cutting edges joins a first clearance surface protruding relative to a plane containing a major portion of the minor and major sides. Recesses are formed in the major sides.
101 Citations
11 Claims
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1. Cutting insert adapted to be mounted in a pocket of a milling body to be rotated in a milling machine,
the cutting insert comprising: -
an upper side constituting a chip surface, a lower side constituting a support surface, first and second major sides each intersecting the upper side, and first and second minor sides each intersecting the upper side and each interconnecting the first and second major sides; the insert further including a pair of cutting edges formed by the intersection of the upper side, the first major side and the first minor side, the pair of cutting edges comprising a major cutting edge extending along the first major side, and a minor cutting edge extending along the first minor side, the major cutting edge and the minor cutting edge intersecting one another to form a cutting corner, the major cutting edge sloping to form an acute angle with the lower side; the first major side and the first minor side forming a ledge structure underlying the pair of cutting edges, the ledge structure including a minor ledge underlying the minor cutting edge, and a major ledge underlying the major cutting edge, the minor ledge and the major ledge each forming an outwardly facing clearance surface, the minor ledge having a height less than a remaining height of the first minor side, and the major ledge having a height less than a remaining height of the first major side; the major ledge extending along at least a portion of the length of the first major side, a lower end of the major ledge being stepped outwardly with respect to a plane defined by a portion of the first major side disposed below the major ledge, a plane defined by the clearance surface of the major ledge being in non-intersecting relationship with a remaining portion of the major side disposed therebelow, whereby the clearance surface of the major ledge can be ground independently of the remaining portion of the major side, the minor ledge extending along only a portion of a length of the respective minor side, a lower end of the minor ledge being stepped outwardly with respect to a plane defined by a portion of the minor side disposed below the minor ledge, a plane defined by the clearance surface of the minor ledge being in non-intersecting relationship with a remaining portion of the minor side disposed therebelow, whereby the clearance surface of the minor ledge can be ground independently of the remaining portion of the minor side; each of the major sides having a recess formed therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A milling tool comprising a milling body adapted to be mounted in a milling machine, the milling body comprising at least one pocket having an axial inclination and shaped to receive a cutting insert formed of cemented carbide,
the cutting insert comprising: -
an upper side constituting a chip surface, a lower side constituting a support surface, first and second major sides each intersecting the upper side, and first and second minor sides each intersecting the upper side and each interconnecting the first and second major sides; the insert further including a pair of cutting edges formed by the intersection of the upper side, the first major side and the first minor side, the pair of cutting edges comprising a major cutting edge extending along the first major side, and a minor cutting edge extending along the first minor side, the major cutting edge and the minor cutting edge intersecting one another to form a cutting corner, the major cutting edge sloping to form an acute angle with the lower side; the first major side and the first minor side forming a ledge structure underlying the pair of cutting edges, the ledge structure including a minor ledge underlying the minor cutting edge, and a major ledge underlying the major cutting edge, the minor ledge and the major ledge each forming an outwardly facing clearance surface, the minor ledge having a height less than a remaining height of the first minor side, and the major ledge having a height less than a remaining height of the first major side; the major ledge extending along at least a portion of the length of the first major side, a lower end of the major ledge being stepped outwardly with respect to a plane defined by a portion of the first major side disposed below the major ledge, a plane defined by the clearance surface of the major ledge being in non-intersecting relationship with a remaining portion of the major side disposed therebelow, whereby the clearance surface of the major ledge can be ground independently of the remaining portion of the major side, the minor ledge extending along only a portion of a length of the respective minor side, a lower end of the minor ledge being stepped outwardly with respect to a plane defined by a portion of the minor side disposed below the minor ledge, a plane defined by the clearance surface of the minor ledge being in non-intersecting relationship with a remaining portion of the minor side disposed therebelow, whereby the clearance surface of the minor ledge can be ground independently of the remaining portion of the minor side; each of the major sides having a recess formed therein.
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Specification