Abstract:
La presente invención se refiere a una máquina para el mecanizado de extremos de cigüeñales (5) que comprende dos cabezales de mecanizado (1, 2) configurados para mecanizar extremos de cigüeñales (5) y dos estaciones de mecanizado (3, 4) configuradas para recibir y fijar al menos un cigüeñal (5), situadas dichas estaciones de mecanizado (3, 4) entre los dos cabezales de mecanizado (1, 2). Los cigüeñales (5) estarán montados de tal modo que estén situados paralelamente y a orientados 180°. Adicionalmente, los cabezales de mecanizado (1, 2) están configurados para enfrentarse a los extremos de los cigüeñales (5) de las estaciones de mecanizado (3, 4). Adicionalmente la invención se refiere a un procedimiento de mecanizado de cigüeñales (5) basado en que ambos cabezales de mecanizado (1, 2) mecanicen extremos brida (9) y extremos espiga (8) alternativamente en los cigüeñales (5) fijados en las estaciones de mecanizado (3, 4). De esta manera la máquina mecaniza cigüeñales sin realizar paradas entre el mecanizado de dos cigüeñales sucesivos.
Abstract:
In a crank pin grinding machine, device and method for indexing the phase of a crank pin that can index the phase while a spindle is being rotating. The device comprises a pair of spindles (23, 24) disposed on a first axis ( alpha ) so as to be separated away from and facing each other and adapted to be driven synchronizing with each other, a chuck main body (26, 27) provided on a leading end of each of the spindles for gripping a crank shaft (34) on a second axis ( beta ) that is parallel to the first axis ( alpha ), a phase changing shaft (55) provided on the second axis ( beta ) of at least one of the chuck main bodies for indexing crank pins (40-42) having different phase angles on the first axis ( alpha ) and a phase indexing shaft (65) coupled to the phase changing shaft so as to be rotatingly driven concentrically with the spindles, the device being controlled such that a first mode in which the phase changing shaft is rotated in a synchronized fashion at the same speed as that of the spindles and a second mode in which the phase changing shaft is rotated in a synchronized fashion with a relative speed difference are effected.
Abstract:
To improve a metal-cutting process for machining cylindrical contours, especially eccentric cylindrical contours on a workpiece mounted to rotate about a longitudinal axis, especially with eccentric crankshaft bearings using a lathe tool, producing a finished contour that either has end measures of satisfactory surface quality or has oversize for finish machining such as grinding or dressing, so that while maintaining or enhancing surface quality and maintaining or enhancing dimensional accuracy, machining times are reduced and overall economic efficiency is raised, the invention proposes that the tools tipped with cutting inserts, especially throw-away cutting inserts, are engaged successively or even simultaneously and that at least one part of the cutting inserts is guided in relation to the workpiece at an effective cutting angle ( gamma f) between -5 DEG and +5 DEG and/or a positive tool back wedge angle ( gamma p).
Abstract:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur endmassgenauen Bearbeitung von Kurbel- oder Nockenwellen auf Endmaßtoleranzen R z
Abstract:
Zur Herstellung rotationssymmetrischer Flächen eines Werkstückes (10) wird eine Drehbearbeitung des rotierend angetriebenen Werkstückes (10) durchgeführt. Hierzu wird ein Werkzeug (12) verwendet, dessen Schneide (16) in einer kreisbogenförmigen Vorschubbewegung (f) bewegt wird. Die Schneide (16) hat die Form einer zur Werkzeugrotationsachse (A 1 ) koaxialen Schraubenlinie.
Abstract:
A crankshaft miller wherein two cutter units (5a, 5b) are provided between a pair of work heads supporting a work (3) provided on a bed at its ends in such a manner as to move longitudinally of the work (3), wherein a main journal processing cutter (12a) and a first rest device (15a) are provided on one (5a) of the pair of cutter units, a pitch between the cutter and rest device being set such that when processing a counterweight (3c) by means of the main journal processing cutter (12a), a main journal (3a) adjacent to a counterweight (3c) forming a pair together with the counterweight (3c) to be processed is clamped by the first rest device (15a), and wherein a pin journal processing cutter (12b) and a second rest device (15b) are provided on the other (5b) of the pair of cutter units, a pitch between the cutter and rest device being set such that when processing a pin journal (3b) by means of the pin journal processing cutter (12b), the main journal (3a) adjacent to the pin journal (3b) is clamped by means of the second rest device (15b).
Abstract:
A broaching machine provided at the front end portion of a driving shaft (3) with a first fitting part (10) engaged with one end portion of a broach shaft (25b), and a clamp means (10g) for tightening and fixing this end portion of the broach shaft, and at the front end portion of a support shaft (4) with a second fitting part (4a) engaged with the other end portion of the broach shaft (25b) and axially movable, the second-mentioned end portion of the broach shaft (25b) being rotatable with respect to a broach shaft body (25). A broaching machine in which a presser piece (41) engaged with a tightening bolt (40) screwed to a broaching tool body (31), and passed as a whole through an elongated bore (33b) in a holder (33) is turned so as to be engaged with the holder, the tightening bolt (40) being then tightened so as to fix the holder (33) to the broaching tool body (31), the holder (33) being provided with a stopper (41) for controlling the presser piece (41) in a position in which the presser piece (41) is aligned with the elongated bore (33b) in the holder (33).
Abstract:
Eine Bearbeitungseinrichtung (3) weist zum Bearbeiten von Kurbelwellen (2) ein Werkzeug (13) auf, das einen scheibenförmigen Grundkörper (29) mit umfangsseitig daran angeordneten Schneideinsätzen (31) umfasst. Das Werkzeug (13) ist mittels einer Antriebseinheit (12) um eine Drehachse (14) drehantreibbar. Konzentrisch zu der Drehachse (14) ist eine erste Zuführleitung (33) für ein kryogenes Kühlmedium (5) angeordnet, die zumindest abschnittsweise thermisch isolierend ausgebildet ist. Weiterhin weist das Werkzeug (13) mehrere quer zu der Drehachse (14) verlaufende und zu den Schneideinsätzen (31) führende zweite Zuführleitungen (34) für das kryogene Kühlmedium (5) auf, die jeweils zumindest abschnittsweise isolierend ausgebildet sind. Eine Verteilereinheit (46) koppelt die erste Zuführleitung (33) mit mindestens einer der zweiten Zuführleitungen (34) zum Zuführen des kryogenen Kühlmediums (5) zu mindestens einem der Schneideinsätze (31). Mittels der Bearbeitungseinrichtung (3) kann das kryogene Kühlmedium (5) direkt zu den in Eingriff mit der zu bearbeitenden Kurbelwelle (2) befindlichen Schneideinsätzen (31) geführt und diese gekühlt werden, wodurch eine höhere Produktivität und Wirtschaftlichkeit bei der Bearbeitung der Kurbelwellen (2) erzielt wird.
Abstract:
The invention relates to a method for finish machining of rotary pieces, especially crankshaft bearing points in passenger cars, which are at least partially subjected to a hardening process. The inventive method seeks to simplify the removal of material during machining of bearing points pertaining to a crankshaft that is to be hardened. After primary forming, the material is removed by machining using a specific cut.