Abstract: A method of manufacturing a spline telescopic shaft includes a masking step in which, in a prescribed axial-direction region of an intermediate manufacturing product, partial tooth grooves that are equally spaced circumferentially are respectively covered by masking members that are equally spaced circumferentially; a resin coating step in which a resin layer is formed, and inner surfaces of the partial tooth grooves covered by the masking members are left as metal exposed portions that are equally spaced circumferentially; and a coating film forming step in which, in a state where the intermediate manufacturing product provided with the resin layer is centered with respect to a broach via the metal exposed portions, the intermediate manufacturing product and the broach are caused to slide relative to each other in an axial direction by press-fitting such that the resin layer is shaved to form a resin coating film.

Abstract: A shaving die for cutting the surface layer of a wire is provided with a circular cutting blade and a plurality of protrusions. The wire is inserted into the circular cutting blade so that the surface layer of the wire is cut. The protrusions are provided at positions around the cutting blade so as to come into contact with the surface layer of the wire that has been cut by the cutting blade.

Abstract: A method of manufacturing a duplex stainless steel wire product starting from wire rod, includes the steps of: roughening the wire rod surface; applying a carrier coating on the wire rod surface; peeling the wire rod using a shaving die comprising cemented carbide; roughening the wire rod surface; applying a carrier coating on the wire rod surface; and drawing to final wire dimension. In the peeling step, the shaving die used has a rake face land angle ? which is 10-30°, a rake angle ? which is 10-25°, a clearance angle ? which is 3-10°, a rake face land width w which is 0.1-0.5 mm, and an edge radius which is 0.02-0.08 mm. The duplex stainless steel wire product manufactured according to the method exhibits excellent fatigue resistance.

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: 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: A broach tool holding system (20) includes a pair of locator pins (46) rotatably mounted on a tool holder plate (36) to facilitate mounting and detachment of an associated broach tool (34). The broach tool (34) has a pair of locating openings (62) each of which has a locating hole (64) including round clearance surfaces (70) and round locating surfaces (72) that cooperate with the locator pins to provide the mounting in an accurately positioned location. The method of mounting the broach tool utilizing the rotatable locator pins (46) facilitates the mounting of the broach tool (34) with the locating holes that also facilitate the mounting and with securement being provided by clamps (74) for the broaching operation.

Abstract: The invention relates to a wheel bearing assembly for motor vehicles with a bearing provided with an inner ring and an outer ring, the bearing being fitted with its outer ring into a bearing casing and the outer ring being mechanically supported in axial direction on a first side by a supporting surface provided on the bearing casing. Discrete and preferably evenly arranged stop protrusions are formed on the inner circumference of the bearing casing, the outer ring abutting thereon in axial direction on its second side, and the stop protrusions being formed by locally plastic forming the bearing casing.

Abstract: An indexable cutting insert for use in a milling cutter. The cutting insert having four identical side surfaces extending between generally square shaped top and bottom surfaces with two diametrically opposite protuberances extending away from each other in a top or bottom view of the cutting insert. The cutting insert has eight identical major and minor cutting edges. The milling cutter having the general form of a circular disk with a plurality of the cutting inserts releasably mounted in insert pockets angularly around the periphery of the cutter. The cutting inserts are arranged to produce a profile on a workpiece having a central straight section and two beveled sections on either side of the central straight section.

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: In order to control fans, which are arranged for example in power supplies for cooling the components arranged there, a method and a circuit arrangement are proposed which, on the basis of control pulses which are derived from the input current of the fan, effect the control in such a way that the control pulses are re-shaped into monostable pulses and are fed, via an asymmetrical resistance circuit for charging and discharging, to a storage component whose charge state is a measure for the control of the fan.

Abstract: Molten metal created during cutting of a workpiece by a plasma-arc torch is discharged downwardly into a tubular collector duct. A power-rotated cutter is located adjacent the upper end of the duct and shaves dross from the underside of the workpiece as the latter is moved beneath the torch, the dross also being discharged downwardly into the duct. Water is sprayed into the duct to cool the duct and is also sprayed against the rotary cutter to cool the cutter as the dross is shaved from the workpiece.

Abstract: A pot type broach assembly having a plurality of tool holders serially connected to each other. Each tool holder has a plurality of sub-holder slots and a plurality of pilot slots equally spaced about an inner surface. The sub-holder slots and pilot slots are longitudinally aligned. A sub-holder member is attached in each longitudinally aligned sub-holder slot and a pilot member is attached in each longitudinally aligned pilot slot. Each sub-holder member has a pair of longitudinal side mounting faces and at least one broach member is attached to each side mounting face. The pilot member engages the broach members on either side thereof and prohibits lateral displacement of the sub-holders and the attached broach member. The pilot members also guide the part support member to which the part to be machined is attached as it is displaced through the broach assembly.

Abstract: A broaching method for finishing an outer peripheral surface of a resin layer of a resin-coated lobe-type rotor for a rotary fluid machine of a Roots type, which includes the steps of forming, with a leading grooving cutter, at least one chip-breaker groove in the outer peripheral surface of the resin layer, such that the chip-breaker groove extends in a broaching direction parallel to an axis of rotation of the rotor. The method further includes the steps of finishing at least a portion of the outer peripheral surface of the resin layer with a trailing finish cutter having a cutting edge contour corresponding to the portion of the outer peripheral surface of the resin layer, which is finished by the finish cutter after the chip-breaker groove is formed therein by the grooving cutter. A composite broach or formed broach having the grooving and finish cutters is fed such that the grooving cutter leads the finish cutter in the broaching direction.

Abstract: A broaching tool is provided with at least nine cutting tool edges arranged at its circumference. The cutting tool edges cover only a certain sector along the circumference of a tool disk while leaving another sector between a first and last cutting tool edge free of cutting tool edges. This feature enables moving a tool axially relative to a work piece without first moving the tool radially relative to the work piece. Further, the tool can be moved radially without damage. These movements are performed when the sector without cutting tool edges faces the work piece. This sector without cutting tool edges has an opening angle of less than 180.degree. and it provides a spacing and free space relative to a work piece. Thus, work piece surfaces that have been machined by the cutting edges, are free of these cutting edges if and when the other sector faces the work piece.

Abstract: A method of processing a scroll member having a spiral wrap and an end plate which is conducted by effecting a shaving on at least one side surface of the spiral wrap by a tool while applying to the tool both of an axial small force and an ultrasonic oscillation simultaneously. An apparatus is proposed which comprises a shaving tool having a spiral groove of the same configuration as the spiral wrap, and a cutting edge portion formed on at least one side edge of the groove over the entire length of the side edge. A tool supporting device supports the shaving tool, and a blank supporting device supports a scroll blank such that the scroll blank opposes to the shaving tool. A device is connected to the tool supporting means and is adapted to impart to the tool a pressing force necessary for effecting the shaving, and an ultrasonic oscillation generating device is adapted to impart an ultrasonic oscillation to one of the tool or the blank.

Abstract: A pot broach for cutting small pinions from the solid for use with a pull-up broaching machine, the pot having a multiplicity of solidly abutting flat sided internally toothed cutting rings and internally slotted support rings, with elongated toothed sticks received in the slots of said support rings.