Abstract: The invention concerns a device for the non-contact measurement of the position of the teeth (13) of a workpiece (14) with precut teeth on a gear finishing machine. The measuring probe, retractable from the measuring position into a position of rest protected against soiling, is arranged in a holder (5) for radial and axial adjustment relative to the workpiece, the said holder (5) being a kinematic member of a parallelogram linkage (A) and by means of a hydraulic, pneumatic or electromechanical swivel drive (11) is swivellable from stop to stop between measuring position and position of rest in a plane containing the workpiece axis, such that in the advancement action from the lower end position (15) to the upper end position (12) motions of the measuring probe (1) tangential to the workpiece circumference are completely avoided. The parallelogram kinematics moreover afford adequate protection against swarf and grinding dust, and lends the device a high stiffness and reliability.

Abstract: On account of the constructional form of the tool head (17) according to the invention, the opposite sides (18, 19) of a tool (13) attached to the tool spindle (14) of a numerically controlled continuously generating gear grinding or hobbing machine are capable of machining the upper and lower sets of teeth (2, 3) of a double-sided face-gear (1) in one and the same set-up and without disturbing the synchronization between the rotations of the grinding worm and workpiece maintained during the grinding of the first set of teeth, without risk of collision. This eliminates the need to reset the workpiece (1) between the machining of the two sets of teeth (2, 3), thereby shortening the overall machining time substantially, and allowing the avoidance of accuracy losses due to the resetting of the workpiece (1).

Abstract: In a process for the registration of the state of wear of a tool used in gear manufacture, where the tool has at least one abrasive tooth tip for machining a workpiece in a machining process, a cutting distance per tooth tip of the tool is determined, and this cutting distance, weighted with a wear intensity factor, compared with a specified life path constant. This life path constant indicates the maximum acceptable state of wear of the tool for the machining of the workpiece. By way of this process the wear behaviour can be registered, and a total and residual piece potential determined.

Abstract: A grinding wheel fixture (S) for the accommodation of a dressable grinding wheel (5) is provided with an annular groove (6, 6′, 8) for the accommodation of balancing lugs (9, 10), the balancing lugs (9, 10) being for manual balancing purposes displaceable and fixable within the annular groove (6, 6′, 8) with respect to their angular position. The balancing lugs (9, 10) are divisible into at least two groups, the groups being displaceable and fixable in any desirable angular position independent of each other. The grinding wheel fixture permits a simple, quick, and nevertheless highly exact dynamic balancing, whereby repeated re-measurement and repeated correction are no longer necessary.

Abstract: The invention concerns a machine for the chip-forming machining and the measurement of gears and screw-type workpieces. Arranged on a swivel head (6) swivellable about an axis (A) at right angles to the rotary axis of the workpiece (4) are functional units (8a, 8b, 8c, 8d) with machining and measuring tools (10, 12, 14, 15, 17) which are displaceable radially and parallel relative to the swivel axis (A), which said tools can be brought consecutively into engagement with the workpiece (4), thus making possible the application of different tools (10, 12, 14, 15, 17) and machining techniques in the same work set-up without colliding. The work spindle (1) is driven by electric motor either directly or via a gear unit.

Abstract: The device serves for the end face, angularly true driving of a pre-toothed workpiece (21) clamped between work centers by the rotating work spindle (3) of a tooth flank grinding machine. It takes place by means of a wobble plate (10) connected without play to the work spindle by way of the work arbor (1), the intermediate disc (17) and the cylindrical steel rollers (13, 18), the surface of which said wobble plate which contacts the workpiece end face (29) being according to the invention coated with galvanically bonded hard material grains (24).

Abstract: In the continuous generation grinding of a gear the modifications of tooth trace contours and/or corrections of tooth trace deviations determined by flank measurement are specified separately for the left and right flanks (3, 4) of the gear (1). By means of these data, supplementary motions of the NC machine axes across the face width of the left flank (3) and the right flank (4) of the gear (1) are calculated in a control system of a gear flank grinding machine, by means of which a grinding worm produces the specified modified or deviation corrected tooth traces on the left flanks (3) and the right flanks (4) of the gear (1) in one and the same grinding stroke.

Abstract: A grinding wheel fixture (S) for the accommodation of a dressable grinding wheel (5) is provided with an annular groove (6, 6′, 8) for the accommodation of balancing lugs (9, 10), the balancing lugs (9, 10) being for manual balancing purposes displaceable and fixable within the annular groove (6, 6′, 8) with respect to their angular position. The balancing lugs (9, 10) are divisible into at least two groups, the groups being displaceable and fixable in any desirable angular position independent of each other. The grinding wheel fixture permits a simple, quick, and nevertheless highly exact dynamic balancing, whereby repeated re-measurement and repeated correction are no longer necessary.

Abstract: The device according to the invention for the tailstock end centering and clamping of a rotational workpiece with a circular-cylindrical end comprises a housing with a shank for accommodation in a tailstock barrel, and a chucking pot with a collet located in the housing for rotation about the axis of rotation of the workpiece. In accordance with the invention the collet is closable by way of the axial advancing action of the tailstock, and the axial tailstock thrust effecting the closing and clamping of the collet is transmitted to the workpiece in such manner that it is applied to the center of the workpiece, and the latter is displaceable into the center without friction generating radial sliding of the collet.

Abstract: The invention relates to a control system of a CNC machine tool with cyclically recurring sequences. The control system has a data input and visualization unit, a machine check unit and a NC control unit with at least one stored NC program for generating movement sequences for the CNC machine. Functional data which are required for the machining of a specific work piece and which have been fed into the data input and visualization unit or selected in the unit are conveyed from the data input and visualization to the NC control unit. The machine check unit calls up function modules of the NC control program according to selected control data and by means of control codes, said function modules representing part programs, and proceeds from one function module to the next independently of its hierarchical position in the tree structure. In so doing, the machine check unit deactivates the hold commands in each function module by means of the control codes.

Abstract: Determining of the starting and end positions of the machining programme of a gear making machine with respect to the axial position of the workpiece (11, 18) by means of a laser light line (14) projected at right angles to the workpiece axis, the position of which light line relative to the reference point of the tool (5, 17) is known. By mutual displacement parallel to the workpiece axis, the light line (14) and one or both of the workpiece end faces (16) are brought to coincide. The axial positions thus obtained are transmitted to the machine control system. The determining of the axial tool position takes place analogously by the projection of a laser light line onto the circumference surface of the tool (5, 17) at right angles to the tool axis.

Abstract: Located for rotation in a machine base (1) is a work spindle (4) for the setting up of a workpiece (6). A grinding spindle (10) for setting up a grinding wheel (11) can be radially infed relative to the work spindle (4) and displaced in the plane at right angles to the infeed direction. A pick-up holder (22) with several measuring sensors (23, 24) is displaceable parallel to the axis (7) by means of an NC controlled spindle (16). With the apparatus described the workpiece (6) can be measured for mesh-aligning before grinding, as well as during grinding (e.g. for avoiding grinding burn), and after grinding (for final inspection). The process permits high productivity with short cycle times and few rejects.

Abstract: A grinding worm (4) on a grinding spindle is driven in a rotating manner. On a rotatable plate (7), two workpiece spindles (6a, b) are positioned at a distance from one another and driven in a rotating manner. The one workpiece (5) is ground with the grinding worm (4), while on the other spindle (6b) a ground workpiece (8a) is exchanged for an unmachined part (8b) using a loader (10). Each spindle (6a, b) has a corresponding centering probe (9a, b). By means of the signal of the probe and a control mechanism, the newly clamped-on workpiece (8b) is centered before the rotating plate (7) is rotated into the position, in which this toothed gear (8b) can be brought into a mesh with the grinding worm (4). In such a way, the unproductive times can be largely reduced.

Abstract: Interface between the spindle nose (1) and the fixture flange (11) of interchangeable tool, gauge or workpiece holder (7) of a machine tool with a shortened centring taper (8) on the underside of the flange of the holder (7), said taper being formed as an axially and radially rigid but in circumference elastically expansible tubular stub (15), which due to its elastic properties adapts itself to the diameter of the centring taper (6) on the spindle nose (1).

Abstract: In a process for the registration of the state of wear of a tool used in gear manufacture, where the tool has at least one abrasive tooth tip for machining a workpiece in a machining process, a cutting distance per tooth tip of the tool is determined, and this cutting distance, weighted with a wear intensity factor, compared with a specified life path constant. This life path constant indicates the maximum acceptable state of wear of the tool for the machining of the workpiece. By way of this process the wear behaviour can be registered, and a total and residual piece potential determined.

Abstract: Method and an apparatus for the profiling of single-gear or multiple-gear grinding worms for grinding tooth profiles in accordance with the principle of continuous diagonal generating grinding. A grinding worm is divided into at least two axial zones wherein one zone remains unmodified and a second zone receives, by means of special profiling methods, modifications of the thread flanks for the generation of tooth flank modifications The main attribute of these profiling methods is additional movements, which are superimposed on the disk-shaped profiling tool and/or the grinding worm in relation to a given profiling shift position, and which result in the modifications of the grinding worm flanks that are mapped onto the flanks of the toothed wheel work during subsequent diagonal generating grinding across a grinding worm zone profiled in this manner.

Abstract: The gear train of a work drive system on a machine for the continuous grinding of gears, with which by means of non-integer transmission ratio between work spindle (3) and drive motor (4) as well as a high number of teeth on the cylindrical gear (6) on the work spindle (3), high integer transverse and face contact ratio of the gear train, and a damping ring (7) on the work spindle (3), tonal disturbances of the workpiece incorporated in the gear unit are avoided.

Abstract: The process describes how transmission gears (6) can be manufactured in a highly economical and highly precise manner. In one single mounting, the complete hard fine-machining on all of the most important functional surfaces of the workpiece is conducted simultaneously. This multi-process is made possible through the combined use of a continuous generating grinding process for the machining of gearing, a known method for the machining of the boring and possibly of a frontal surface, and the fixing of workpieces (6) on form elements such as chamfers or plane surfaces by means of centering elements (9, 10) which are designed in such a way that they do not block the free access of the individual tools (5, 11, 28) to the surfaces (7, 8, 27) to be machined.

Abstract: On account of the constructional form of the tool head (17) according to the invention, the opposite sides (18, 19) of a tool (13) attached to the tool spindle (14) of a numerically controlled continuously generating gear grinding or hobbing machine are capable of machining the upper and lower sets of teeth (2, 3) of a double-sided face-gear (1) in one and the same set-up and without disturbing the synchronization between the rotations of the grinding worm and workpiece maintained during the grinding of the first set of teeth, without risk of collision. This eliminates the need to reset the workpiece (1) between the machining of the two sets of teeth (2, 3), thereby shortening the overall machining time substantially, and allowing the avoidance of accuracy losses due to the resetting of the workpiece (1).

Abstract: The device serves for the end face, angularly true driving of a pre-toothed workpiece (21) clamped between work centers by the rotating work spindle (3) of a tooth flank grinding machine.