Abstract: A rack may include a toothed portion having a toothing, and a shaft portion having a threaded portion with a coaxial thread that has a thread length in an axial direction of a longitudinal axis. Separate segments comprising at least one in each case bar-shaped toothed segment and one shaft segment are provided, are aligned on the longitudinal axis, and are connected to one another at a joint. A method for producing the rack may involve providing a shaft raw material piece having a piece length that is a multiple of a shaft segment length, generating a thread that is continuous in a longitudinal direction on the shaft raw material piece across a multiple of the thread length to produce a threaded semi-finished product, cutting to length a threaded segment from the threaded semi-finished product, providing a toothed segment, and joining the threaded segment to the toothed segment.

Abstract: A system and method for forming a feature on an inner surface of a gear includes a sensor for sensing the position of a feature on the gear, a cutting station having a cutting tool for forming the feature on the inner surface of the gear, and a controller. The controller is operable to determine an amount of rotation necessary to rotate either the gear or the cutting tool such that the feature on the inner surface of the gear is formed at a desired orientation relative to the feature on the outer surface of the gear.

Abstract: A broach (20) includes a rough broach section (32) having toothed broach inserts (38) and guides (40) that provide rough broaching of gear teeth, and a shave ring section (34) of the broach includes annular shave rings (60) having internal teeth (62) for providing final shaving of the gear teeth and also having guides (70) that maintain the gear radially centered during the final shaving.

Abstract: The apparatus of the present invention provides a broaching machine configured to produce an internal gear member. The broaching machine includes a broaching tool defining a central axis. The broaching tool includes a first set of broaching teeth configured to cut only a first flank portion of a plurality of gear teeth; and a second set of broaching teeth configured to cut only a second flank portion of the plurality of gear teeth. The plurality of gear teeth are formed such that the first and second flank portions of each gear tooth are tapered between a first end portion and a second end portion. The broaching machine also includes a motor configured to rotate the broaching tool about the central axis at a selectable rate and in a selectable direction. A corresponding method for producing an internal gear member is also provided.

Abstract: The apparatus of the present invention provides a broaching machine configured to produce an internal gear member. The broaching machine includes a broaching tool defining a central axis. The broaching tool includes a first set of broaching teeth configured to cut both a first flank portion and a second flank portion of a plurality of gear teeth. The broaching tool also includes a second set of broaching teeth configured to cut only the second flank portion of the plurality of gear teeth. The plurality of gear teeth are formed such that the first and second flank portions of each gear tooth are tapered between a first end portion and a second end portion. The broaching machine also includes a motor configured to rotate the broaching tool about the central axis at a selectable rate and in a selectable direction. A corresponding method for producing an internal gear member is also provided.

Abstract: The apparatus of the present invention provides a broaching machine configured to produce an internal gear member. The broaching machine includes a broaching tool defining a central axis. The broaching tool includes a first set of broaching teeth configured to cut only a first flank portion of a plurality of gear teeth; and a second set of broaching teeth configured to cut only a second flank portion of the plurality of gear teeth. The plurality of gear teeth are formed such that the first and second flank portions of each gear tooth are tapered between a first end portion and a second end portion. The broaching machine also includes a motor configured to rotate the broaching tool about the central axis at a selectable rate and in a selectable direction. A corresponding method for producing an internal gear member is also provided.

Abstract: A milling tool includes a milling body and a plurality of cutting inserts. The milling body has fastening devices to hold the cutting inserts in a plurality of respective insert pockets each having at least one base surface. Each of the cutting inserts has at least one cutting edge. The tool has a rotational axis and a rotational direction, as well as a feed direction and an end surface. The milling tool is provided to cut a work piece substantially in an axial direction of the tool, which is substantially perpendicular to the feed direction.

Abstract: In order to manufacture parts with an outer profile, a workpiece (32) is pressed by a pressure piece (24) through a ring-shaped cutting tool (34). The cutting tool (34) has a plurality of disks with inner cutting edges (62) for removing material from the workpiece (32). The cutting edges are progressively longer in the advance direction, so that each cutting edge removes material chips and the last cutting edge in the advance direction corresponds to the desired outer profile of the part. In order to improve chip removal, the chip chambers (74) located between the cutting edges communicate with the outside through radial connection openings (128) which are distributed all around their circumference. To hold the workpiece (32) securely on the pressure piece (24), a pressure pad (76) extends through the cutting tool (34) and is supported on the side of the workpiece (32) opposite to the pressure piece (32), and a hydraulic piston (80) generates a compression force on the pressure pad (76).

Abstract: Apparatus for progressive blind broaching has an indexing table which carries a load station, a unload station and several tool stations. Broaches are mounted on the table at the tool stations. Rams on opposite sides of the table move workpieces up and down to be broached between intermittent indexing of the table. The load station has a workpiece holder to deliver unbroached workpieces to the rams. The unload station has a workpiece holder to receive broached workpieces from the rams. A transfer mechanism moves workpieces from a exchange depot at the rear of the table to the load station and moves workpieces from the unload station to the exchange depot. This transfer mechanism moves across the top of the table and does not occupy or obstruct any space along the sides or front of the table.

Abstract: Profiled workpieces are produced in a machine tool having a toolholder for at least one tool and work carrier for the workpieces, there being means for relative reciprocation of said toolholder and carrier. In the course of the reciprocatory movement the tool produces a profile on the workpiece in the direction of movement of the toolholder. The length of the profile in the stroke direction is greater than the length of the stroke movement. To produce the desired tool length, this is divided, in the direction of the relative movement between tool and workpiece, into at least two portions which are produced separately from one another.

Abstract: Work pieces, especially of rotational symmetry, are machined in a rotary broaching operation. The machine tool for this purpose has a tool carrier carrying a plurality of cutting edges arranged on a curved path in a radial work piece plane. In order to reduce down-time and to simplify the construction of the broaching apparatus, the insertion of a work piece blank into the apparatus and the removal of a finished work piece from the apparatus are preferably performed without interrupting the motions of a tool carrier. For this purpose the tool carrier is provided with a zone which is free of cutting tool edges. This tool free zone of the tool carrier is located downstream of the last cutting edge as viewed in the rotational direction of the tool carrier. This feature avoids the need for a return stroke of the tool carrier. Accordingly, respective return slides and return controls are also obviated.

Abstract: A tool holder with a coolant inducer and a quick acting locking mechanism is disclosed. The holder body is provided with a tapered bore to receive the tapered shank of a cutting tool. The tapered shank has cam surfaces for engagement with locking pins in the holder body to cam the shank into drive transmitting and fluid-tight engagement with the tapered bore. A locking mechanism locks the tapered shank in the camming relationship with the locking pins and a retaining mechanism holds the mechanism in its locked position. A coolant inducer comprises an inducer ring at the upper end of the holder body and defining a fluid-tight chamber therewith. A fluid conduit is connected through a fitting in the inducer ring to the chamber which communicates with the upper end of the tapered bore in the holder body.

Abstract: In a machine of the type in which cutting tools are arranged on successive links of an endless chain, each tool being in offset rotation to the preceding tool, at right angles to the direction of travel, means are provided for periodically shifting the workhead and work spindle parallel with the plane in which the tools travel when cutting. The means for shifting are operatively independent of the means for driving the chain and the work spindle in generation, and are operated when the tools and workpieces are disengaged, and normally after a predetermined number of stacks of workpieces has been cut, in order to equalize wear on the blades carried by the chain.

Abstract: A series of adjacent grooves with mutually equal pitch are produced by a broaching process wherein two adjacent grooves are simultaneously produced in one broaching stroke by means of two broaching tools, one of which performs the preliminary broaching of a first groove and the other of which performs the finish broaching of a second groove which was preliminarly broached on a previous stroke. A preferred device for execution of the process is formed by utilization of a broaching girder which secures a T-shaped supporting strip, and wherein two tools, one a preliminary broaching tool and the other a final broaching tool, are secured in the angular position of the pitch of the grooves to be produced between respective sides of the T-shaped supporting strip and claws of the broaching girder.

Abstract: Controllable tooling is mounted in a carrier with parallel spring elements positioned at right angles to an intended path of adjustment for the tooling so that precisely controlled adjustments can be applied to the tooling while it is performing a cutting operation on a workpiece.

Abstract: A gear manufacturing machine which includes an endless chain for carrying a series of stock removing tools is provided with a versatile drive train system which can be adjusted for different methods of gear manufacture. The drive train system includes coupling components which can be engaged and disengaged for connecting or disconnecting certain portions of the drive train from parts of the machine. With this arrangement, a single machine can be utilized for carrying out roll generating or hobbing operations with one or more workpieces.

Abstract: A gear cutting machine is provided with an endless chain for carrying a plurality of tools into contact with one or more workpieces to thereby form gear tooth configurations on the workpieces. The endless chain is pressed into firm contact with a first series of rollers in the zone in which its tools make contact with a workpiece to thereby prevent unwanted deflections of the endless chain and its tools relative to the workpiece. A second series of rollers prevents side-to-side deflections of the endless chain in the work zone.

Abstract: A gear cutting machine is provided with an endless chain for carrying a plurality of tools into contact with one or more workpieces to thereby form gear tooth configurations on the workpieces. The endless chain is provided with tightening means for stiffening articulated links of the chain as it passs through a zone in which its tools make contact with a workpiece, thereby providing a rigid series of links in the work zone.

Abstract: An endless chain for carrying stock removal tools is provided with two sets of rollers for supporting and guiding the chain around a chain housing. One set of rollers functions to guide the chain through the work zone portion of its travel while the second set of rollers functions to guide the chain through non-work zone portions of its travel.

Abstract: A machine for the manufacture of variable ratio racks such as are used in the steering gear of cars, the machine having a plurality of pairs of broaching blades and a holding fixture for holding at least one rack blank so that it can be indexed about a central point of the rack. The machine is arranged so that as either the broach blades are moved past the rack blank or the rack blank is moved past the broach blades pairs of corresponding teeth on each side of the center line are formed simultaneously, the rack blank being indexed to an angle to suit the angle of inclination of a pair of teeth about to be cut to the longitudinal axis of the rack. The machine produces a rack blank in which pairs of teeth of different form and different angular inclination are formed to a shape closely approximating the final shape of the teeth which is achieved by an additional step such as pressing or machining.

Abstract: A clamping means is provided between a movable housing and a fixed structure of an endless chain machine for reducing deflections between cutting tools carried by the movable housing and a workpiece carried by a separate housing of the machine.