Abstract: The invention makes available a method for the production of gear wheels, with which it is possible to produce gear wheels having double-helical teeth, in particularly efficient manner. For this purpose, in the case of the method according to the invention for chipping production of a gear wheel, which is provided with double-helical teeth, in which the teeth of the one gear half are configured to run counter to the teeth of the other gear half, in rising manner, wherein the gear halves are arranged offset from one another by an angle amount with reference to the axis of rotation of the gear wheel, a gear wheel blank is made available, on which the teeth provided on the gear wheel are produced by means of hobbing, using a hobbing wheel, which, during hobbing machining of the teeth, in each instance, of one of the gear halves, reaches all the way into the adjacent tooth gaps of the other gear half, in each instance.

Abstract: This invention provides a machine tool capable of easily and quickly attaching/detaching a tool holder while reliably holding the tool holder, including at least two clamp holes (211) that receive pins (203) extending through at least two through holes (202) provided in a tool holder (134), at least two tubular clamp sleeves (302) fitted in the at least two clamp holes (211), respectively, and each including a flexible trunk portion (321), a fluid encapsulating chamber that encapsulates a fluid, a channel extended from the fluid encapsulating chamber to an outer peripheral surface of the flexible trunk portion, and a pressure adjusting portion that adjusts a pressure of the fluid in the fluid encapsulating chamber, wherein a clamp fastening force is made to act on the pins (203) in synchronism with an increase or a decrease in the fluid pressure in the fluid encapsulating chamber.

Abstract: A workholding apparatus comprising a chuck body, first jaw members and second jaw members wherein the second jaw members are shaped to grip a workpiece of a particular geometry. The first and second jaw members are constructed to enable easy, quick and manual replacement of the second jaw members with other second jaw members having different grip shapes so as to enable gripping of workpieces with different geometries.

Abstract: A diaphragm chuck with an operating element inserted in a chuck body and axially movable in relation to the chuck body, a diaphragm attached to a free end of the operating element with the diaphragm secured to the chuck body by its outer circumference, three base jaws in driving connection with the diaphragm, on each of which a centering surface is disposed in a concentric alignment with the axis of the operating element, three clamping jaws attached to the corresponding base jaws, by which a gear to be machined can be clamped and which make contact with the centering surface, and clamping pins, each allocated to one of the clamping jaws, radially aligned and arranged between two teeth of the gear in the clamped condition, such that the diaphragm chucks reliably clamps differently sized gears and gears with different numbers of teeth between the three clamping jaws.

Abstract: A diaphragm chuck with an operating element inserted in a chuck body and axially movable in relation to the chuck body, a diaphragm attached to a free end of the operating element with the diaphragm secured to the chuck body by its outer circumference, three base jaws in driving connection with the diaphragm, on each of which a centering surface is disposed in a concentric alignment with the axis of the operating element, three clamping jaws attached to the corresponding base jaws, by which a gear to be machined can be clamped and which make contact with the centering surface, and clamping pins, each allocated to one of the clamping jaws, radially aligned and arranged between two teeth of the gear in the clamped condition, such that the diaphragm chucks reliably clamps differently sized gears and gears with different numbers of teeth between the three clamping jaws.

Abstract: A method for manufacturing a bevel gear member, comprises the steps of providing a bevel gear blank having a gearhead, forming gear teeth on the gearhead of the bevel gear blank by simultaneously cutting gear tooth top land, gear tooth side profile and a bottom land to form an unfinished bevel gear member using a face hobbing process, and machining at least one selected surface of the unfinished bevel gear member using the top lands of said gear teeth as a datum for centering the unfinished bevel gear member, thus forming a finished product. The method is applicable for manufacturing the bevel gear member both with shaft axially extending from the gearhead and without the shaft. The bevel gear members manufactured with this method exhibit reduced runout and require simpler, less expensive tooling.

Abstract: A method and apparatus for mounting a supply roll to a rotatable support shaft in an imaging system. The apparatus includes a first collet/collar assembly for accurately positioning the supply roll at a desired location on the support shaft, and a second collet/collar assembly for frictionally coupling the support shaft to an interior surface of a supply core of the supply roll using a deformable gland.

Abstract: Centering device acting upon an already present first ring (14a) of a straight or double helical toothing of gears, sprocket wheels or pulleys to obtain the second ring (14b) of the toothing generated by a pinion shaped cutter (16), a central groove (19) separating said first ring and said second ring. The centering device comprising a retractable pin (20, 120), cooperating during the positioning step of the gear (13), with at least a tooth (15) of the first ring (14a), having a first waiting position (20a, 120a) and a second operating position (20b, 120b) defining the angular position of the gear (13) clamped on the rotary supporting base (18), the angular position being functionally correlated to the plane which contains the axis (25) of the gear (11) and the axis (26) of the cutter (16).

Abstract: The present invention relates to a fixture and method for positioning and holding a gear to be machined, as for example in a ring and pinion gear set for vehicle axles. The fixture includes a base, a clamp and a locator. The base has a surface against which the gear is to be held and a bore which extends into the base from the surface of the base. The clamp is connected to the base. The locator is movably disposed in the bore of the base such that the locator is moveable between a first position wherein an end of the locator extends above the surface of the base for positioning the ring gear by aligning with a surface which defines a bore of the gear so that the clamp can be positioned to hold the ring gear and a second position to which the locator is retracted below the surface of the base so that the ring gear can be machined without interference by the locator.