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Cutting insert

An insert and milling technology, applied in metal processing equipment, milling machine equipment, manufacturing tools, etc., can solve the problem of not being able to cut 90° shoulders

Inactive Publication Date: 2008-04-09
钴碳化钨硬质合金维迪亚产品有限公司及两合公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are eight cutting edges, the 90° shoulder cannot be cut with such a cutting insert because the secondary cutting edge backcuts the crank arm of the 90° shoulder.
Therefore the use of these cutting plates is also limited to the utilization of four cutting edges

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0017] The cuboid cutting insert has opposite front faces 10 and 11 , which merge above and below via a convex end face 1 into an upper side and a lower side 5 . The cutting surfaces are formed by the side faces 6 which connect the respective front faces 10 and 11 to one another. These sides 6 are defined by the cutting edge 7 formed by the upper and lower surfaces 5 and the convex end surface 1, which covers an angle of 90° in the corner region 7' ​​and has an inwardly inclined secondary cutting edge, which passes through the tight The descending surface 2 connected after the end surface 1 is formed. This surface 2 extends along the entire thickness 3 of the cutting insert and exposes the secondary cutting edge so that it cannot backcut when the cutting tool enters the workpiece at right angles. The two front faces 10 and 11 also have a planar support surface 8 on each side, wherein these support surfaces lie parallel to one another. In the bearing surface there is a fasten...

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PUM

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Abstract

The present invention relates to a cutting inserting piece which is used to be clamped in a disk-shaped or board-strip-shaped knife body, especially for the milling of the crankshaft, the cutting inserting piece is basically rectangular and comprises the following components: two front surfaces (10 and 11) and the space length of which fixes the width (4) of the cutting inserting piece; two side surfaces which are used as the cutting surface (6) and the space length of which fixes the thickness (3) of the cutting inserting piece; and an upper side surface and a lower side surface (5), wherein one convex end plane (1) is respectively arranged between each front surface (10 and 11) and the upper side surface and the lower side surface (5), thereby the upper side surface, the lower side surface (5) and the convex end plane respectively form a knife edge (7) with one side surface (6), and the knife edge ends at the cutting angle part (7') in the side direction; the invention is characterized the convex end plane (1) is connected with a surface (2) that descends inward, the descending surface allows the knife edge projection (7'), the inclined surfaces (13 and 14) which descend to each outer periphery are arranged between the inward-descending surfaces (2) at the two sides of one flat supporting surface (8) on the front surfaces (10 and 11), and the width and the thickness of the cutting inserting piece differ by 20% to each other at most, preferably have same length.

Description

technical field [0001] The invention relates to a cutting insert for clamping in a disc-shaped or lath-shaped tool body, in particular for the milling of crankshafts, which is substantially cuboid and has: two front faces , the distance between which determines the width of the cutting insert; two sides serving as cutting faces, the distance between which determines the thickness of the cutting insert; A convex end face, whereby the upper side and the lower side and the convex end face each form a blade with a side, the blades terminating laterally in a corner of the blade. Such a cutting insert is known, for example, from DE 197 04 931 C1. Background technique [0002] In order to cut out a 90° shoulder when machining the bearing position of a crankshaft, the bearing must first be roughed with a first cutting plate, and then the cylindrical surface must be finished with the aid of a so-called diameter plate. If two different revolving cutting plates with four cutting edge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C5/20
Inventor M·海因洛特J·贝尔M·豪斯曼C·施瓦纳
Owner 钴碳化钨硬质合金维迪亚产品有限公司及两合公司