Abstract: Disclosed is a method of grinding bevel gear teeth in an intermittent indexing process using a single grinding wheel provided with different bevel angles (.alpha.) to produce the desired grinding wheel radii (R): one flank is machined during grinding in downward generation as far as a first turning point, another flank is produced in upward generation as far as a second turning point, and machine settings are so adjusted in the turning points as to ensure a correct pressure angle and correct flank topography during the generating process, irrespective of the different bevel angles (.alpha.). The process combines the advantages of the known completing process, by which both flanks can be ground at the same time at the cost of imposing a particular wheel body geometry with conical teeth, with those of the known two-track process for grinding both flanks with a double grinding head, by which various additional correction factors can be introduced to optimize the flank shape for convex and concave flanks.

Abstract: In a process for finishing the hardened teeth of a bevel gear wheel by grinding after hardening, the ground teeth are fine- honed, this procedure being carried out in the same chucking as the preceding grinding. A machine especially suitable for this procedure has a chucking device for the bevel gear wheel (12) and a double machining head for mounting two machining tools, namely a grinding wheel (26) and a honing wheel (28). The bevel gear wheel (12) to be machined is preferably a pinion, and accordingly the honing wheel (28) is a bevel gear-type machining tool. Pairing the ground and honed pinion (12) with a bevel gear which has been only ground results in a good noise standard, and the lapping required for hypoid gears manufactured in the traditional way, with its associated drawbacks, is unnecessary.

Abstract: A CNC machine for producing spiral-toothed bevel gears is described, which has a first carriage supporting a tool spindle and is displaceable in height, and whose guide is disposed on a lateral surface of a machine housing, which is horizontally guided in a straight coordinate axis on a machine base. The tool spindle axis is parallel with the lateral surface and with the coordinate axis. Furthermore, the machine has a workpiece spindle support having a second carriage and a pivoting device with a vertical axis and is also horizontally guided on the machine base. The parallel arrangement of the tool spindle axis results in a new machine concept with a compact structure and optimal chip flow. Therefore the machine is particularly suited for heavy-duty dry milling. Since the tool spindle is not located above the area of the machine having a horizontal guide, it is possible to arrange a chip collector underneath the tool spindle, which can be reached by the chips essentially under the force of gravity.

Abstract: The invention relates to a method for producing continuous corrections on a bevel gear, whereby by entering a plurality of corrections into the CNC control of the machine and interpolation between them, camber designs and even the designs of twists or the avoidance of twists on the tooth flanks can be performed by suitable superimposition of corrections on the inner and outer tooth tips with corrections of the plunger position.

Abstract: A machine for grinding pregeared bevel gears in which the grinding of both flanks of the tooth gap is performed in a single setting and by a single tool in a hobbing process. The grinding machine is provided with a truing device rigidly connected to a stationary part of the machine, and a truing tool is pivotable relative to the grinding wheel to adjust an angle of engagement therebetween. An oscillating movement is imparted to the grinding head carrying the grinding wheel radially relative to the bevel gear being ground and a compensating movement in the direction perpendicular to the oscillating movement is also imparted to the grinding wheel, whereby the grinding of the pregeared bevel gears of any profiles is possible.

Abstract: A method and device for grinding pregeared bevel gears in which the grinding of both flanks of the tooth gap is performed in a single setting and by a single tool in a hobbing process. The grinding machine is provided with a truing device which is rigidly connected to a stationary part of the machine and in which a truing tool is pivotable relative to a grinding wheel to adjust the engagement of the grinding wheel and gear to be treated. A radial movement is imparted to the grinding tool and a compensating movement in a direction perpendicular to that of the radial movement is also imparted to the grinding tool, whereby the grinding of pregeared bevel gears having any profile is possible.

Abstract: A method of and an arrangement for grinding gears, particularly bevel gears, includes grinding in a cooling lubricant bath in the cooling and lubricating medium to provide an increased grinding efficiency and cooler grinding without danger of grinding damage, and also guarantee self-cleaning of the grinding wheel since the cooling lubricant is always available in the grinding point.

Abstract: A method and apparatus for grinding pairs of gear wheels such as spiral or curved tooth bevel gear wheels whereby a first wheel is ground with a male cup-type grinding tool and a second, counter wheel is ground with a female cup-type grinding wheel with an additional eccentric cyclic motion being applied to one of said wheels. In accordance with a preferred feature of the invention, the grinding tools utilized are not exactly complementarily congruent, the female tool differing by an amount that is equal to the amount of the additional eccentric cyclic motion that is effective in the direction of the tooth normal. The additional eccentric motion is preferably elliptical and in accordance with an apparatus aspect of the invention a drive is provided for achieving such elliptical supplementary motion.

Abstract: A wheel dressing system is designed for use on a grinding machine for producing spiral bevel gears with a cup-type abrasive wheel having conical faces on or in the edge of its cup. The dressing system makes use of a diamond dressing roller which is moved up in plunge cut motions to the separate flanks or sides of the abrasive wheel. The dresser roller has different cone angles for producing the best fit conditions between them and the grinding flanks of the abrasive wheels to be trued.

Abstract: In a process and apparatus for tooth-flank grinding of gearwheels, the opposing flanks of two adjacent teeth are initially ground simultaneously. In the terminal stages of the process, each flank is ground separately. A slight rocking motion of the gearwheel, provided by pivoted pawl in an indexing wheel, applies the grinding tool first to one tooth flank and then to the other. Any undesirable rounding off of the tooth flanks occurring during simultaneous tooth flank grinding can thus be corrected.

Abstract: A dressing tool for a gear machine grinding wheel has a disc with a notch reproducing the tooth space of the gear ground by the machine. The flanks of the space open radially inward into a bore. A strip coated with diamond granules is removably affixed to the sides of the notch and looped around a clamp bolt in the bore which holds the strip taut. The tool, when dressing the wheel, is guided in the same manner as a gear when being ground.

Abstract: A dressing arrangement for a gear grinding machine for form grinding helically geared wheels with a grinding wheel oriented with respect to the workpiece gear at an angle of inclination corresponding to the angle of inclination of the teeth of the workpiece gear. A dressing tool is provided with truing flanks in the form of a cut out of the workpiece gear and includes at least one tooth or tooth gap. The truing flanks are provided with diamond grains by coating the same or by applying a coated band on the flanks. The dressing tool may be mounted on its own axle to cooperate at any desired point with the form grinding wheel or the dressing tool and the gear workpiece may be disposed on the same axle. The dressing tool may also be disposed on a carrier having at least a single tooth mounted thereon with the coated band being disposed on the single tooth.

Abstract: A CNC machine for producing spiral-toothed bevel gears is described, which has a first carriage supporting a tool spindle and is displaceable in height, and whose guide is disposed on a lateral surface of a machine housing, which is horizontally guided in a straight coordinate axis on a machine base. The tool spindle axis is parallel with the lateral surface and with the coordinate axis. Furthermore, the machine has a workpiece spindle support having a second carriage and a pivoting device with a vertical axis and is also horizontally guided on the machine base. The parallel arrangement of the tool spindle axis results in a new machine concept with a compact structure and optimal chip flow. Therefore the machine is particularly suited for heavy-duty dry milling. Since the tool spindle is not located above the area of the machine having a horizontal guide, it is possible to arrange a chip collector underneath the tool spindle, which can be reached by the chips essentially under the force of gravity.