Abstract:
The invention relates to a method for producing gear plates (1) for a continuously variable gearbox wherein at least two gear plates (1) with the transmission surfaces (2) thereof are arranged in an opposite manner. When the gearbox is in operation, said transmission surfaces come into contact in a non-positive mode with a power transmission element, on a device comprising at least one workpiece spindle (3) and a grinding disc (4) which is driven by a grinding spindle (5) in order to grind the transmission surface (2) of at least one gear plate (1). During the grinding of the transmission surface (2), a repeated relative oscillating movement is carried out radially in relation to the workpiece spindle (3), between the grinding disc (4) and the gear plate (1), in such a way that the grinding region of the grinding disc (4) is moved back and forth between an inner radius (2.1) and an outer radius (2.2) of the transmission surface (2). The gear plate (1) is rotated by means of the workpiece spindle (3) in such a way that the entire transmission surface (2) is ground.
Abstract:
The invention relates to a loading and unloading device for a machine tool (5). A travelling loading unit (1) can be coupled to a machine tool (5) by at least one securing device (10). One part of securing device is mounted on machine tool and another interacting part is fixed to loading unit and can be decoupled once more from machine tool after loading or unloading.
Abstract:
On a workpiece (1) there are first longitudinal portions (2a, 2b, 2c) which are rotationally symmetrical with respect to the continuous longitudinal axis (5) and are intended to be ground by way of centreless grinding. The workpiece (1) also has a second longitudinal portion (3), which is not rotationally symmetrical with respect to the longitudinal axis (5) and would lead to imbalance in the event of rotation. Therefore, a balancing weight (6) having a radially extending recess (7) is placed on the second longitudinal portion (3) (arrow 9, sliding ribs 8). The balancing weight (6) contributes largely to uniform distribution of the rotating masses, thus reduces the imbalance to a very low residual imbalance and allows reliable and precise centreless grinding.
Abstract:
The invention relates to a grinding machine comprising at least one bed, feed slides and a grinding table with superstructures, which further presents a turning-tool holding fixture (6) for hard machining. The invention also relates to a method for machining a workpiece (1) in a grinding machine, according to which the workpiece (1) is hard-machined by turning in said grinding machine.
Abstract:
Disclosed is a machine part (5) with a conical effective surface, which is machined by means of a device comprising a machine bed (1), a longitudinally movable grinding bench (7), and a workpiece spindle head (2) that clamps the machine part (5) by means of clamping jaws (4) via a chuck (3). The conical effective surface of the machine part (5) is ground by means of a first grinding disk (14) in a vertical grinding mode by longitudinally moving the grinding bench (7) in the direction of the longitudinal axis (6). The associated grinding spindle head (10) is provided with a first grinding spindle (12) for the first grinding disk (14) and a second grinding spindle (13) for a second grinding disk (16) that is fixed to a grinding arbor (15). The grinding spindle head (10) is fixed to a grinding spindle carriage (9) so as to be pivotable around a vertical shaft (11), said grinding spindle carriage (9) being movable in the direction of the x-axis via a displacement motor (8). B indicates the swiveling direction of the grinding spindle head (10) while X and Z represent the common axes referred to in CNC technology. The first grinding disk (14) can be driven out of the area of the machine part while the second grinding disk (16) can be made to act upon the machine part (5) in order to internally grind a longitudinal borehole.
Abstract:
The invention relates to a method for producing gear plates (1) for a continuously variable gearbox wherein at least two gear plates (1) with the transmission surfaces (2) thereof are arranged in an opposite manner. When the gearbox is in operation, said transmission surfaces come into contact in a non-positive mode with a power transmission element, on a device comprising at least one workpiece spindle (3) and a grinding disc (4) which is driven by a grinding spindle (5) in order to grind the transmission surface (2) of at least one gear plate (1). During the grinding of the transmission surface (2), a repeated relative oscillating movement is carried out radially in relation to the workpiece spindle (3), between the grinding disc (4) and the gear plate (1), in such a way that the grinding region of the grinding disc (4) is moved back and forth between an inner radius (2.1) and an outer radius (2.2) of the transmission surface (2). The gear plate (1) is rotated by means of the workpiece spindle (3) in such a way that the entire transmission surface (2) is ground.
Abstract:
The invention relates to a method and device for grinding fluted tools (10) that have an essentially circular envelope curve, in particular, for grinding spiral fluted tools. The device provided with a steady for guiding the tool to be ground comprises a guideway (8) with at least two inner lateral faces. The lateral faces each extend in planes in a manner that is essentially parallel to the longitudinal axis of the tool to be ground and they from an angle for accommodating the tool to be ground, whereby the tool to be ground rests each time with at least two circumferential points (a11, a12) of its essentially circular envelope curve at least on two of the inner lateral faces of the guideway. In order to carry out the inventive method, a tool to be ground is appropriately clamped and pressed into the guideway by means of at least one grinding wheel (41) while the flutes are ground.
Abstract:
The invention relates to a method for controlling the process during rough grinding of a workpiece (2) in which, according to the invention, the workpiece (2) is measured during grinding by a sensor (13) to ascertain an actual size, and the measured actual size is corrected in a continuously automatic manner to attain a predetermined specified size according to grinding time. The invention also relates to a grinding machine which is provided for carrying out the method and which comprises a grinding wheel (10) for rough grinding a workpiece (2) on a grinding spindle head. The grinding machine also has a sensor (13) for detecting a ground workpiece dimension, and comprises a machine control, whereby the workpiece (2) is held between a workpiece spindle (1A) and a tail spindle (4A). According to the invention, the sensor (13) is arranged primarily in a plane formed by the contact area of the grinding wheel (10) which turns on the workpiece (2), and during rough grinding, said sensor continuously transmits measurement signals to the machine control. Said machine control controls the grinding wheel (10) based on these signals in such a way that the grinding process can be executed as an in-process control.
Abstract:
Gemäß einem ersten Aspekt der Erfindung wird ein Verfahren zur Komplettbearbeitung zumindest von unbearbeiteten zentrischen Zapfen (10) und Hublagerzapfen (11) sowie deren jeweiligen, die Zapfen umgebenden Planschultern (9, 10) geschmiedeter oder gegossener Rohlinge einer Kurbelwelle beschrieben. Bei dem erfindungsgemäßen Verfahren werden zunächst die den zentrischen Zapfen (10) zugeordneten Planschultem (9) gedreht, woran sich ein Grobschleifen der zentrischen Zapfen (10) ohne deren Planschultern (9) und der Hublagerzapfen (11) mit deren Planschultern (12) anschließt. Nach dem Grobschleifen der Zapfen (10, 11) verbleibt ein Aufmaß, welches kleiner ist als ein für ein übliches Fertigschleifen von Zapfen und Planschultern erforderliches Aufmaß. An den Schritt des Grobschleifens schließt sich danach das Fertigschleifen der zentrischen Zapfen (10) und der Hublagerzapfen (11) von dem durch das Grobschleifen verbleibenden kleineren Aufmaß (23) auf Endmaß an. Gemäß einem zweiten Aspekt der Erfindung wird eine Fertigungslinie für eine solche Komplettbearbeitung beschrieben.
Abstract:
Die Erfindung betrifft ein Schleifzentrum zum gleichzeitigen Schleifen mehrerer Haupt- und Hublager bzw. zentrischer und endseitiger Partien von Kurbelwellen (22). Zwei Hublager-Schleifspindeln (14, 15), von denen die erste nur in Z-Richtung und die zweite nur geringfügig in X-Richtung verstellbar sind, sind auf einem gemeinsamen Hublager-Kreuzschlitten (11) montiert. In der Endphase des Schleifens erfolgt eine Korrektur von Maßabweichungen zwischen den beiden bearbeiteten Hublagern über eine gesonderte Ansteuerung der zweiten Hublager-Schleifspindel (15) im Sinne einer Maß- oder Rundheitskorrektur. Die Abweichungen werden über Messeinrichtungen erfasst. Für das Schleifen der endseitigen Partien ist eine schräggestellte profilierte Schleifscheibe vorgesehen.