Abstract: A gear machining machine has a cutter head with improved rigidity. The machine is equipped with a movement base that is movably supported and rotatably supports a rotation table on which an external gear or an internal gear is mounted; a bridge section of a gate-shaped column provided at a location above the movement base; a saddle which is supported by the bridge section in a vertically movable manner; and a cutter head on the front surface of the saddle, the lower end of which rotatably supports a tool. A protrusion which projects forward is provided on the front surface of the cutter head. The tool is disposed so that the front thereof protrudes further forward of an end surface which is the most forward projecting portion of the protrusion.

Abstract: The present invention relates to a processing head for processing machines, preferably tooth milling and tooth grinding machines, comprising a direct drive which is arranged in a processing head bed of a processing machine, wherein the direct drive comprises at least two motors actuatable in synchronism with each other.

Abstract: Race grooves and lobe outer surfaces of a constant-velocity race gear centered on a gear axis are finished by engaging a first groove of the race gear with a rotating groove-machining tool and relatively moving the race gear and rotating groove-machining tool arcuately to finish the first groove while holding the race gear against rotation about its gear axis. Then the first groove of the race gear is disengaged from the rotating groove-machining tool while holding the race gear against rotation about its gear axis. Then the race gear is rotated about its gear axis to align a second groove with the rotating groove-machining tool while engaging a first lobe outer surface with a rotating surface-machining tool to finish same. These steps are repeated in the same order to finish the second groove and a second lobe outer surface and so on until all the grooves and lobe outer surfaces of the race gear are finished.

Abstract: The invention relates to a device for green machining bevel gears, comprising an CNC machining station for gear cutting a wheel blank (K2). The machining station comprises a tool spindle which is used to receive a gear cutting tool and a work piece spindle which is used to receive the gear blank (K2). Said machining station also relates to a machining station which operates in a vertical manner. Said device also comprises a vertical processing station having a tool holder and a work piece spindle which is used to receive a work piece blank (K1). The machining station mechanically forms a functional unit together with the pre-machining station, wherein the work piece blank (K1) undergoes green machining in the pre-machining station, and is transferred as a gear blank (K2) to the first machining station after the first green machining where it is cut into a gear. Said machining station and the pre-machining station are linked together in terms of data and control.

Abstract: A method and tool arrangement for producing straight bevel gears and the like on a multi-axis computer controlled machine wherein a single tool is utilized in the machining process.

Abstract: A method and tool arrangement for producing straight bevel gears and the like on a multi-axis computer controlled machine wherein a single tool is utilized in the machining process.

Abstract: A gear-forming cutter for forming a gear tooth on a non-metallic blank includes a spindle and a blade portion. The blade portion extends from the spindle along an axis of the spindle, and includes a blade surface and a surrounding surface. The blade surface has front and rear sides, and opposite first and second lateral sides. The surrounding surface is disposed around the axis, and extends from the first lateral side to the second lateral side. Any point of the first lateral side is spaced apart from the axis by a first radial distance. Any point of the second lateral side is spaced apart from the axis by a second radial distance smaller than the corresponding first radial distance. The first radial distance corresponding to the rear side is larger than that corresponding to the front side.

Abstract: Method for machining right toothed bevel gears, wherein: at least a part of the tooth flanks is milled with a disc milling cutter, the left tooth flanks are milled at a different time than the right tooth flanks, the machined bevel gear is rotated by an angle between the milling process of at least one left tooth flank and the milling process of at least one right tooth flank, the inclination of the axis of the disc milling cutter remains unchanged during the milling process of said gear, said angle being not a multiple of the base pitch &agr;.

Abstract: An apparatus and method for milling internal gears and splines using a pair of opposed milling cutters disposed internally in a gear or spline blank. The apparatus generally milling gear teeth on generally opposite sides of the blank with an indexing mechanism for manipulating the orientation of the milling apparatus with respect to the blank. Also disclosed are internal gears having milled teeth which are manufactured using the apparatus and the method.

Abstract: The profiling tool (10) has a segment (12) of a worm thread. Its active zone (13) is coated with grains of hard material (16) and is crowned in cylinder sections coaxial to the tool axis (26). During profiling, the grinding spindle (2) and the tool (10) rotate synchronously. By appropriate correction of the coupling ratio by means of a CNC control when moving the tool (10) in axial direction of the grinding worm (2), the grinding worm flank (1) can be dressed with any desired topology. The method makes it possible to profile topologically modified grinding worms (2) at the grinding worm (2) rotational speed used for grinding, which was previously not possible.

Abstract: A base member such as an elevation pipe of a photographic tripod is severed and rack teeth are formed thereon in a single operation while the base member remains clamped in a V-block. The first rack tooth on each side of the location where the base member is severed includes half of a trough portion between adjacent rack teeth. Additional trough portions forming the remainder of the teeth are formed, either in the same severing and shaping operation, or in a later shaping operation. The formation of the inner half trough portions ensures that, when the two severed ends of the base member are brought together, a smooth transition will exist between the two rack portions. In addition, since the two severed ends always include half troughs immediately adjacent thereto, weaknesses and chipping resulting from the presence of partial rack teeth in these locations is avoided.

Abstract: A method for the manufacture of gears, in which a gear adapted for meshing with a toothed pinion is formed by means of a disc tool having a cutting edge exactly the same as the contour of the teeth of the pinion; the tool being positioned so that its cutting edge would be coincident, if the gear were meshed with the pinion, with the contour of the teeth of the pinion itself, and is pivoted about an axis perpendicular to its own axis of rotating; about the pivot axis, the gear is moved translationally along a line of action perpendicular to the axis of rotation of the disc tool itself and is rotated about its own axis perpendicular to the line of action; the ratio of the speeds of rotation of the gear about its axis and the speed of pivoting of the disc tool about is axis being variable in dependence on the position of the zone of contact of the disc with the gear.

Abstract: An apparatus for machining a bevel gear has an apparatus frame, a spindle head provided on the apparatus frame for rotatably supporting a spindle on which a machining tool is mounted, and an indexing unit provided for holding a workpiece such that the workpiece is indexed by one pitch of teeth to be formed thereon to perform machining of tooth spaces with the machining tool. The spindle is horizontally and rotatably held on a spindle head such that the spindle is immovable in the axial direction of the spindle. The spindle head is movable back and forth in the axial direction and is movable in a lateral direction at right angles to the axial line. A column is provided on the apparatus frame in front of the spindle head such that the column is turnable about a vertical axial line at an arbitrary angle. The indexing unit is provided in a plurality of pieces on an external periphery of the column at a distance between each of the indexing units.

Abstract: A fixture for manufacturing hubs for flexible gear couplings wherein the teeth of said hub are cut while the hub is being moved constantly through all of the positions that the hub would assume relative to the sleeve during operation with the hub shaft misaligned with the sleeve at the maximum angle of misalignment for which the coupling is designed.

Abstract: Formations on a workpiece (1) are machined along an arcuate path (5) having a center (4) in eccentrically spaced relation to a rotational axis (3) about which the workpiece is indexed by a holder (2). A tool (7) is controllably displaced through its carrier (12) in such a manner as to establish radial alignment of the tool relative to the indexing axis and the path center during operational strokes to enable machining of identical formations spaced along the path. The radius of curvature of the path is greater than the maximum distance (4-14) to which said operational strokes are limited.

Abstract: In order to increase its production rate, a grinding machine has two work tables situated one on each side of a grinding wheel. The tables each have a workpiece holder having a chuck which holds at least a workpiece. In this way the two workpieces can be ground simultaneously by the single grinding wheel. The chucks can be rotated step by step at the same instants as each other so that tooth gaps can be ground simultaneously on the two workpieces. The two tooth gaps, the shape and dimensions of which are dependent upon the profile of the grinding wheel, and which are ground simultaneously will be identical to each other.