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US 6,682,271 B2Granted
Milling tool and insert, particularly thread milling cutter
AssigneeVargus Ltd.
InventorMichael Kichin
Life of this patent
Estimating the term…
Abstract
The invention relates to a milling tool. The milling tool has bearing and orientation surfaces for a substantially tangential reception of milling inserts. The receptacles of the milling tool can be arranged in adjacent manner axially symmetrically to the rotational milling axis of the milling tool. The milling insert can be eccentrically braced in the milling tool receptacle.
Claims26
A milling insert comprising:
- a generally flat holding section for connecting the milling insert to a receptacle of a milling cutter shank, the holding section having a trapezoidal inner base face forming a bearing surface for bearing against the milling cutting shank, an outer top face, a rear face, and lateral faces extending on both sides of the holding sectional, said lateral faces forming sides of the holding section and defining orientation surfaces, the sides of the holding section diverging from the rear face to a front portion of the holding section;
- a cutting section for cutting a workpiece, said cutting section forming said front portion of the holding section, and projecting outwardly from the holding section at an obtuse angle thereto, the cutting section having an outwardly pointing end face, a rear face, and a front face including a planar portion and a rounded tool face portion, wherein the rounded tool face portion of the front face of the cutting section is constructed as a chip guidance surface for guiding chips away from the cutting section of the milling insert, and wherein a cutting edge is formed at the intersection of the end face and the planar portion of the front face;
- at least one hole through the holding section for receiving holding means for pressing the holding section to a bearing surface of the milling cutter shank;
- wherein the holding section and the cutting section of the milling insert are arranged such that said rear face of the cutting section and the outer top face of the holding section are at an obtuse angle to one another.
1 more element
A milling tool comprising:
- a milling cutter shank mounted rotatably about a milling rotational milling axis;
- the milling cutter shank comprising a plurality of receptacles formed on a surface of the milling cutter shank for receiving a plurality of milling inserts, the milling cutter shank having a polygonal cross-section in the vicinity of the receptacles;
- wherein each receptacle has bearing and orientation surfaces adapted to cooperate with corresponding bearing and orientation surfaces of the milling inserts for mounting each milling insert in a respective receptacle in a fixed orientation;
- wherein the bearing surfaces of the shank extend in a substantially tangential direction to the circumference of the shank around the rotational milling axis such that bearing surfaces of each adjacent receptacle are contiguous and form said polygonal section of the milling cutter shank;
- wherein the bearing and orientation surfaces of the milling insert are constructed on a holding section of the milling insert at an obtuse angle to a cutting section of the milling insert;
- the cutting section of the milling insert comprising a cutting edge and a tool face constructed as a chip guidance face;
- the milling inserts being fixed to the milling cutter shank by means of holes and screws.
4 more elements
A milling cutter shank rotatable about a rotational milling axis, comprising:
- a plurality of receptacles formed on a surface of the milling cutter shank, each receptacle provided for receiving a milling insert having a cutting edge;
- each receptacle having bearing and orientation surfaces adapted to cooperate with corresponding bearing and orientation surfaces of the milling insert for mounting the milling insert in the receptacle in a fixed orientation;
- the bearing surfaces extending in a substantially tangential direction to the circumference of the shank around the rotational milling axis;
- at least one hole extending substantially radially in each bearing surface for fixing the milling insert;
- wherein the orientation surfaces extend on both sides of each bearing surface and diverge in a circumferential direction;
- and
- wherein the bearing surfaces of each adjacent receptacle are contiguous and form a polygonal section of the milling cutter shank.
4 more elements
Dependencies are inferred from the claim text.