Abstract:
Mit der vorgestellen Bearbeitungsfolge gelingt es, den Schleifprozess aus der Kurbelwellenfertigung vollständig zu eliminieren. Die Feinbearbeitung wird vorzugsweise als Trockenbearbeitung als orthogonales Drehfräsen durchgeführt, wobei alle Hauptlager (37-39) und Hublager (48-51) in einer einzigen Aufspannung von den Schrubbbearbeitungsmaßen auf Endmaß bearbeitet werden. Für eine zweite Bearbeitungsfolge dienen einige der Haupt- und Hublager dann als Spannflächen, wodurch Maßketten vermieden werden. Kompensationsmaßnahmen zur Kompensation der Flexibilität der Kurbelwelle stellen Maßhaltigkeit derselben, auch unter Großserienbedingungen sicher.
Abstract:
The invention relates to a cutting insert used for cutting metal, especially for milling for example camshafts. The inventive insert comprises at least one cutting edge (4, 4') that is formed by the intersection of a face (2) with a flank (3). The aim of the invention is to provide a cutting insert for a milling cutter and a corresponding milling cutter the noise level of which, even if at full load, is considerably reduced for high-speed milling. To this end, the cutting edges (4, 4') extend at an angle deviating from 90 DEG relative to the cutting direction of the cutting insert.
Abstract:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur endmassgenauen Bearbeitung von Kurbel- oder Nockenwellen auf Endmaßtoleranzen R z
Abstract:
The invention relates to a cutting insert for camshaft milling cutters, consisting of a substantially cuboid cutting body (1), comprising an upper surface (2) and a lower surface (3) which is substantially parallel to said upper surface, four lateral surfaces (4, 4') and cutting edges (5, 6, 7) which are formed along the intersections of the lateral surfaces (4, 4') with the upper surface (2) and/or the lower surface (3) and comprising a corresponding side milling cutter. The invention aims to provide a cutting insert and a corresponding side milling cutter which are easier to manufacture and which can be used effectively to produce cam profiles with a linear principal cross-section that is parallel to an axis, for example, cylindrical, with bevelled edges and/or reduced-diameter projections on one or both sides. According to the invention, to achieve this, the upper surface (2) and/or the lower surface (3) have raised corner areas (8) on diagonally opposing corners, which project above the plane of the upper or lower surface (2, 3) and extend as far as the lateral surfaces (4, 4') in such a way, that the cutting edges (5, 6, 7) are formed at least partially by the intersection of the lateral surfaces (4, 4') with the surface of the raised corner areas (8).
Abstract:
A method of milling a work (1) by a cam shaft miller provided at the both sides of a plurality of journals (J1-J4) thereof with cams (C1, C2-C7, C8) having the same phase and also provided at one end thereof with a ring (C9), wherein use is made of a cutter (6) provided at the central portion thereof with a tip (6a) for milling the ring (C9) and also provided at the both sides of the tip (6a) thereof with tips (6b, 6c) for simultaneously milling the cams (C1, C2-C7, C8) having the same phase, whereby cams (C1, C2-C7, C8) having the same phase are successively and simultaneously milled for each journal (J1-J4) by the tips (6b, 6c) at the both sides, and the ring (C9) is milled by the central tip (6a). With this arrangement, the cams and the ring can be milled by use of only one machine, and cams having the same phase can be simultaneously milled, thereby improving the productivity.
Abstract:
A three-dimensional cam is defined by the peripheral surface (5) of a rotation body (4) which contacts the cam across its entire length (11) and whose rotational axis (6) intersects the rotational axis (3) of the cam when the circular cylindrical base section (2) of the cam is produced. The elevation section of the cam (1) and the areas of the circular cylindrical base section (3) adjoining the same are only crossed once. In order to produce the elevation section, the rotation body (4) carries out movements which include a rotation about an axis (12). A three-dimensional cam produced according to the inventive method can be used for a cam follower to feel different elevation curves when the cam is displaced along its rotational axis.
Abstract:
A milling apparatus and method are provided for generating eccentric camshaft lobes with a peripheral surface that is parallel to the horizontal axis of the camshaft for preferably the entire 360 degree peripheral surface of the lobe. In one form, the cutter (35) is shifted during milling so that the cutting insert (45) is cutting the peripheral surface on the lobe that is always parallel to the camshaft axis. The cutter head (30) can be tilted to keep the cutting edge (45a) straight and parallel to the camshaft axis and, as the cutting head (30) pivots the cutting edge (45a), it also moves sideways with the width of the cutter (30) covering the width of the lobe's peripheral surface.
Abstract:
A milling apparatus and method are provided for generating eccentric camshaft lobes with a peripheral surface that is parallel to the horizontal axis of the camshaft for preferably the entire 360° peripheral surface of the lobe. In one form, the cutter is shifted during milling so that the cutting insert is cutting the peripheral surface on the lobe that is always parallel to the camshaft axis. The cutter head can be titled to keep the cutting edge straight and parallel to the camshaft axis and, as the cutting head pivots the cutting edge, it also moves sideways with the width of the cutter covering the width of the lobe's peripheral surface. If an eccentric lobe is of a drastic shape where the cutting edge does not cover the entire width of the lobe, a fourth axis may be used in an interpolative manner to keep the cutting edge always bridging the lobe surface.
Abstract:
An indexable cutting insert (10) for use in a milling cutter (50). The cutting insert (10) having four identical side surfaces (16) extending between generally square shaped top (12) and bottom surfaces (14) with two diametrically opposite protuberances (28) extending away from each other in a top or bottom view of the cutting insert (10). The cutting insert (10) has eight identical major (30) and minor cutting edges (32). The milling cutter (50) having the general form of a circular disk (52) with a plurality of the cutting inserts (10) releasably mounted in insert pockets (54) angularly around the periphery (58) of the cutter. The cutting inserts (10) are arranged to produce a profile (60) on a workpiece (62) having a central straight section (60) and two beveled sections (60', 60'') on either side of the central straight section (60).