Face miller and use thereof

Abstract

The face miller (12) is equipped with a plurality of plate-shaped hard material cutting inserts (20) that are distributed over the circumference. The hard material cutting inserts are located on a graduated circle in pockets (18) of a blade carrier (16) and have a main cutting edge (24), which is adjusted at a cutting edge angle (Kr) smaller than 90 relative to the working plane (26) of the miller. In order to ensure maximum machining performance at a good service life, the cutting edge angle (Kr) is selected to range between 10 DEG and 30 DEG, preferably between 15 DEG and 25 DEG, wherein the main cutting edge (24) at the same time has a slightly convex design. The main cutting edge (24) transitions into the secondary cutting edge (32) via a transition radius (R30) having a value that ranges between 0.5 and 1.5 mm. The axial rake angle (ya) ranges between 20 DEG and 30 DEG , preferably between 23 DEG and 27 DEG. According to an advantageous further development, the radial rake angle (yr) ranges between -6 DEG and -10 DEG, preferably between -7 DEG and -9 DEG.

Description

technical field [0001] The invention relates to a face milling cutter according to the preamble of claim 1 with a plurality of plate-shaped hard material cutting inserts distributed around its periphery. Background technique [0002] Face milling cutters of this type are often implemented as milling heads, on which a number of inserts (for example indexable inserts) made of cemented carbide, ceramic (cermet) or polycrystalline diamond (PCD) are mounted. In conventional technology, the blade is formed with an entering angle κ of about 75° r It is installed on the flat milling head in the same way, that is, the main cutting edge forms an angle κ of about 75° with the plane to be machined in a plane containing the axis of the milling cutter r . Wherein, the axis of the milling cutter is perpendicular to the surface of the workpiece, and the secondary cutting edge against the end face of the cutter produces the surface to be processed. [0003] Like cutting tools, face millin...

AI Technical Summary

Problems solved by technology

[0004] However, the aforementioned type of face milling cutter has the following problems when the cutting speed is continuously increased: the cutting force distribution generated after the cutting edge suddenly cuts into the workpiece will cause the milling cutter to vibrate violently and cause the insert to be subjected to point-like distribution. overload

The result is often that the tool cannot maintain an adequate level of cutting efficiency and tool life

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