Reamer comprising a cutting plate

Abstract

The invention relates to a reamer which comprises a shaft comprising a traction part and in the axial direction thereof, a working area which is provided with at least one interchangeable tool part and at least one pressure body which is fixed thereto. The tool part is embodied as a hard metal cutting plate (1), in particular, as an indexable insert. According to the invention, the cutting surface (4) of the cutting plate (1)is arranged at a distance (S) of at least 0,02mm from the cutting edge (5, 5') on one side in the region of the cut part (6) and at least partially has a peak-to-valley height which increases by at least 0,01mm in order to assure the production of cut fragments in the main cutting area and to prevent a build up of cuts in the region of auxiliary cutting section and / orto simplify the removal of cuts. Also, higher targets can be reached by virtue of the fact that the cutting plates (1) comprise at least one cutting cavity (8) in the cutting surface thereof (4) at adistance of at least 0.02 mm from the main cutting edge (5) on the end side in the region of the entry angle (6).

Description

technical field [0001] The invention relates to a reamer comprising a shaft with a traction part and an axially opposite working area with at least one interchangeable tool part and at least one pressure part, wherein the tool part Cutting plates of hard metal up to 25 mm in length, 8 mm in width and approximately 4 mm in height or thickness, especially designed as indexable inserts, having flat bearing surfaces in longitudinal section, each forming at least one main cutting edge and a secondary cutting edge tool side, chip-carrying surface and substantially concave pressure surface adapted to the clamping shoe, viewed from above, is a pluggable adjustable insertable at its end substantially parallel to the shaft axis for cutting The auxiliary cutting edge has a cut-off portion at an angle to the shaft axis in the feed direction of the reamer with at least one main cutting edge. Background technique [0002] Numerous indexable inserts for turning, reaming, planing, milling,...

AI Technical Summary

Problems solved by technology

[0009] However, all cutting plates of the prior art for reamers have the common disadvantage that the flat chip-carrying surfaces of the main and auxiliary cutting edges are facing the cutting edges, which collect chips especially in the area of ​​the auxiliary cutting edges and thus in the During finishing machining of workpieces, increased chip evacuation leads to higher coefficient of friction and heat generation due to chip clogging and reduces surface quality

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