Abstract: An apparatus allows for chamfering and deburring the end edges of a toothed production gear in a single operation and with one and the same tool. The tool includes two pressure wheels. Provided on each pressure wheel, axially side by side, are a ring of guide teeth and a ring of deburring teeth projecting circumferentially beyond the ring of the guide teeth. The rings have a filleted transition between them and together form chamfering teeth by means of which the end edges of the production wheels are pressed radially and axially against the production gear by means of adjusting drives.

Abstract: The invention relates to a synchronous coupling with a straight-toothed coupling hub, a coupling star which is axially displaceable in relation thereto and is in engagement therewith. A synchronizing sleeve is held axially in the coupling star and is in engagement with it through ratchet teeth. The sleeve is in engagement with an output shaft for axial displacement thereon through a course thread wherein locking teeth on a locking sleeve can be brought into engagement with corresponding locking teeth on the coupling star. Screw-in teeth are provided at the driving shaft side and at the coupling star side. For the transmission of torque without problems in both directions of rotation, the locking sleeve is provided in engagement with the output shaft for axial adjustment thereon via adjusting teeth through a predetermined axial stroke relative to the driving shaft for interlocking the locking teeth together.

Abstract: A tool device has a toolholder and a profile tool detachably secured to this, both of which comprise stops cooperating with one another for the precise positioning of the cutting profile of the profile tool relative to the toolholder which can be mounted on a machine tool, the stops being constructed in the form of mating surfaces. At least one adjusting element is provided between the toolholder and the profile tool to bring the profile tool to bear on the mating surfaces on the toolholder.

Abstract: A cutting or drawing tool, in which a cutter plate can be precisely located and positioned by means of an adjusting device, in order to produce high-precision profiles. By provision of a second cutter plate, a further face of the workpiece can be machined in a specific relative position to the profile, possibly in a single operation but at least in one setting.

Abstract: A thrust bearing arrangement in which individual thrust bearings are arranged in a plurality of stages. These bearings are connected to thrust-load adjustment devices (1st type with travel limitation, 2nd type without travel limitation) as a result of which the beginning of load-carrying by each bearing can be determined as a result of an adjustable initial tensioning.

Abstract: The measuring system of the gear measuring feeler contains, as a Hall-effect sensor, two Hall-effect sensor elements which are arranged in opposing relationship to each other in the magnetic field. The differential output signal of this dual Hall-effect sensor is processed in a matching circuit which is designed as a differential amplifier circuit, to yield a measuring voltage with respect to zero volt. This measuring voltage is twice as high as in the case where only one Hall-effect sensor element is used as the Hall-effect sensor. Furthermore, the matching circuit is of a simpler structure and the measurement is substantially more precise since there is not required any reference voltage source in the matching circuit.

Abstract: Two shafts each containing a gear wheel or gear are each journalled in two bearing bushes. Each bearing bush is mounted in an end or closure bush laterally inserted into a housing. The end bushes each comprise a collar at the axially inner end thereof which overlaps the inner end of the associated bearing bush. The end bushes are each secured to a respective holder or retaining ring which is received in a countersink formed in the housing and which is firmly held intermediate the housing and a cover member. Consequently, the bearing bushes may be separated from the associated shafts by axially displacing the shafts within the housing after removal of the cover members.

Abstract: A doubly dished or double-cone grinding wheel or a pair of singly dished or single-cone grinding wheels are reciprocated in strokes along the tooth flanks or a helically toothed gear wheel to grind the gear. The stroke motion is controlled in dependence of measured values of the generating motion and of the momentary position of the grinding wheel or wheel pair upon the tooth flank being ground. For this purpose, a grinding reference polygon determining the grinding stroke limits is constructed from the gearing specifications or data. An effective grinding point of the grinding wheel or wheel pair is then determined at short time intervals from measurements of the momentary generating and stroke position of the machine. The spacing of this effective grinding point from the subsequent grinding stroke limit in the grinding stroke direction is determined.

Abstract: Two grinding rolls are mounted at a roll carrier. Below the roll carrier a grinding bowl is rotatably mounted on an axial thrust bearing for rotation about a substantially vertical axis. Below the axial thrust bearing there is arranged a drive device for the grinding bowl. A speed reduction gear arrangement is disposed between the drive device and the grinding bowl and contains a substantially cylindrical housing. This housing supports the axial thrust bearing and itself is supported by a substantially ring-shaped flange at a stand or framework at which there is also supported the roll carrier. The flange is connected to the roll carrier by means of a plurality of, for instance, four tie rods.

Abstract: The dressing tool is mounted on a cross-slide so as to be displaceable in parallel and normally with respect to the working surface or face of the grinding wheel which is to be dressed. After each dressing operation the grinding wheel is re-adjusted so as to be repositioned in a defined plane. A displacement measuring system is operatively coupled to the grinding wheel in order to measure the amount of such re-adjustment or adjustment. A difference observed between the desired amount of dressing and the measured amount of adjustment indicates the extent of wear of the dressing tool. The dressing tool is then correspondingly further adjusted and the grinding wheel is subjected to a further dressing operation.

Abstract: Two clutches are disposed between a driving shaft and a driven shaft, in particular a first synchronous clutch which automatically engages when the driven shaft overtakes the driving shaft and a second synchronous clutch which automatically engages when the driving shaft overtakes the driven shaft. As long as there is no external intervention the two clutches mutually protect one another against unintentional engagement. The clutch arrangement can only be put into a ready or enabled position by the action of an external force. From the ready position, the paired synchronous clutches can effect a torque transmitting connection between a driving shaft and a driven shaft when their rotational speeds are synchronous.

Abstract: Two cutting tool inserts are fastened at each side of a cutting tool insert holder to have their active primary cutting edges aligned. A third cutting tool insert is displaced in relation to the other two cutting tool inserts in the cutting direction such that its active primary cutting edge overlaps in extent the active primary cutting edges of the two aligned cutting tool inserts. This produces an effective total length of the cutting edges which corresponds to the sum of the edge lengths of the three cutting tool inserts less the two overlapping regions. Should one of the cutting tool inserts chip or break off in the region of the overlapping active primary cutting edges, the planing or shaping of hardened gear tooth flanks of a roughed-out gear blank or workpiece can nevertheless be continued since such chipping of the cutting edge has no detrimental influence on the workpiece due to the overlapping.

Abstract: In order to eliminate undulation errors in gear production wherein a generating motion of a gear-tooth flank of a gear fixed to a rotary table corresponding to an involute profile is induced by simultaneously imparting a predetermined rotary motion and a predetermined translatory motion to the rotary table, a reference ratio of these two speeds is determined, the momentary speeds of the table are measured and a momentary ratio is determined therefrom. A difference value is formed between the reference ratio and the momentary ratio. This difference value is first formed for each gear-tooth flank during one revolution and then stored in association with the momentary generating position of the gear and with the momentary stroke position of the gear-fabricating tool and only when the same gear-tooth flank is reached during a further revolution is the adjustment value of the gear-fabricating tool corrected by means of the stored difference values.

Abstract: The feeler in the tooth flank profile measuring apparatus for determining the roughness of the tooth flank surface comprises a Hall-effect sensor placed in a static magnetic field between two permanent magnets instead of the otherwise conventional piezo-electric or inductive measuring system. One of the two permanent magnets is adjustably mounted at one end of a feeler rod or arm which carries at its other end a feeler tip for scanning the tooth flank surface. A conventional cross-spring joint serves to rotationally mount the feeler rod or arm. The cross-spring joint need not be distorted or loaded for adjusting the bearing load of the feeler tip because there is provided for this purpose a magnetic bearing load adjustment device.

Abstract: In a gear tooth flank grinding machine operating on the indexing generating principle, a pair of dished grinding wheels is moved back and forth along the generatrices of involute gear tooth flanks, the grinding stroke being longer than the length of the generatrices by the amount of a supplemental dimension. The effective radius of at least one grinding wheel is measured at least once during the machining of each gear tooth flank and the grinding stroke is reduced in correspondence to the gradual reduction of the measured radius.

Abstract: An engageable toothed or jaw clutch is disposed in each of two parallel power transmission paths of a reduction gear unit. One of the clutches is a self-engaging main clutch having a synchronizing device and the other is a subsidiary clutch without a synchronizing device. The engageable clutch splines or gearing of each clutch are helically toothed and have substantially no clearance or play. Both clutches are interconnected by a converter or actuating mechanism with substantially no play. The converter or actuating mechanism translates the engagement motion of the main clutch into an engagement option of the subsidiary clutch.

Abstract: The double-flank composite error tester contains at least one magnet by means of which an associated gear is brought into a predetermined, always identical rotary position and fixedly held in this position prior to being interengaged with the teeth of another gear. A sensor is positioned adjacent the circumference of the other gear opposite to the center of a tooth tip or of a tooth space of the other gear. The teeth data of the other gear are supplied to a pulse processor. The other gear is then rotated and pulses are generated by the sensor due to this rotation. The pulses are fed to the pulse processor which generates pulses for controlling rotary drive means on the basis of the pulses received from the sensor and the teeth data supplied to the pulse processor. Such controlling pulses correspond to a central position at which the one gear can be engaged with the other gear in a collision-free manner. Instead of the sensor a magnet can be used and then the pulse processor can be omitted.

Abstract: The grinding wheel is axially displaceable by means of an axial drive for material removal or cutting operations and tooth flank corrections. The axial drive comprises a double-acting hydraulic piston-cylinder unit, the piston of which is formed at a spindle sleeve of a grinding wheel spindle and the cylinder of which is formed in a carrier or support sleeve. The cylinder is controllable by a servo-valve. A displacement or path measuring device is operatively associated with the spindle sleeve. The servo-valve as well as the displacement or path measuring device are connected to a displacement or path detection circuit which is connected to a program or operating control. There is thus realized a particularly sensitive and precise adjustment for the material removal or cutting operations and the tooth flank corrections.

Abstract: The dressing tool is mounted on a cross-slide so as to be displaceable in parallel and normally with respect to the working surface or face of the grinding wheel which is to be dressed. After each dressing operation the grinding wheel is re-adjusted so as to be repositioned in a defined plane. A displacement measuring system is operatively coupled to the grinding wheel in order to measure the amount of such re-adjustment or adjustment. A difference observed between the desired amount of dressing and the measured amount of adjustment indicates the extent of wear of the dressing tool. The dressing tool is then correspondingly further adjusted and the grinding wheel is subjected to a further dressing operation.

Abstract: A grinding wheel contains two ring-shaped flanks and is axially displaceable by an axial drive. A radial slide is radially adjustably displaceable relative to the grinding wheel by a radial drive. Both of the displacements in axial and radial direction can be measured by a respective displacement path measuring device. Two dressing tools can be independently reciprocatingly displaced between an operative position and a wear measuring position at the radial slide. A wear measuring device is arranged at the radial slide for measuring in a direction extending substantially parallel to the grinding wheel axis the wear of the dressing tools. The relative displacement in the direction of the grinding wheel axis is governed by the desired flank profile, and a control increases such relative displacement in the direction of the grinding wheel axis by the amount of the wear of the dressing tools.