Abstract: An apparatus useful for forming in a curved surface, an enlarged hole surrounded by an upturned flange whose unattached edge lies substantially in a common plane, uses a drill rod, a set of bits, and a mechanism for forming an upturned flange. A first bit attached to the lower end of the rod forms an initial hole. A second bit, spaced axially along the rod, forms a widened oval hole with tapered sides upon continued axial and rotary movement of the rod relative to the workpiece. A flange forming mechanism is then extended beneath the edge region of the hole and pulled through the hole while rotating, to form the upturned flange. A third bit mounted peripherally with respect to the second bit is used to smooth and level the flange edge and to provide it with a desired shape.

Abstract: A housing for a tri-pot universal joint is manufactured from a tube blank which is cold formed in a two-step indenting process. The indenting process forms the middle of the tube into a tri-lobal section for broaching internal drive tracks while leaving the end portions sufficiently intact to provide circular bands at each end by subsequent machining operations. A closure is attached to the band at one end and the band at the other end is used to mount a conventional boot. A machine having a cam die arrangement suitable for indenting the tube blank is also disclosed.

Abstract: A method is proposed which serves to produce a valve needle of a needle valve. The basis of the method is the production, from a wire serving as the raw material, of a springlike coil on a carrier body, where the adjacent courses of the coil rest on one another, and this coil applied to the carrier body is provided on its circumference with a predetermined contour by grinding on a grinding machine. After the grinding, the individual courses of the coil, forming the individual valve needles, are separated. The wire serving as the raw material and the valve needles after separation of the courses of the coil can be subjected in a suitable manner to a heat treatment. In a simple and inexpensive manner, the method assures the production of curved valve needles with precise dimensions.

Abstract: A method for producing a magnetic rotatable member as a part of a pulley in an electromagnetic clutch is proposed. In order to reduce the producing time and the wasted material amount, the rotatable member is formed by press-drawing a magnetic circular plate to form an annular body consisted of an outer annular cylindrical portion, an inner annular cylindrical portion and an axial end annular plate portion connecting therebetween. Thereafter, the blank is subjected to ironing to form a radial annular rim on the outer surface of the outer annular cylindrical portion at the axial end, and also subjected to cutting-away and bending processes to cut away the outer edge of the inner annular cylindrical portion and to bend the resultant annular thin wall portion radially inwardly so that a radial flange is formed.

Abstract: Structure is provided for inwardly collapsing those portions of a needle jet defining at least the outlet end portion of the jet orifice extending therethrough and for providing the resultant smaller jet orifice with spiral grooves in its walls.

Abstract: A method of manufacturing a seamless outer sleeve for a ball bearing, wherein the sleeve is formed of a hollow cylindrical tube section of uniform wall thickness, with race sections paralleling its axis, projecting radially inward, and formed by non-cutting methods, after which the outer circumference of the sleeve section is cut away by the amount of the depth of the race sections. The race sections for the load-carrying balls are non-cuttingly formed by embossing adjoining ends of race sections together with race transitions which are inclined with respect to the longitudinal direction. The race sections can be slightly arcuate with respect to the longitudinal direction of the sleeve and formed by rolling.

Abstract: Elongate wire stock of gauge appropriate to the desired diameter of a rotatable ignition file or flint wheel is cut into blanks of suitable size. A series of press operations is applied to the blanks by means of respective punches and dies to champfer or round off the peripheral edges of the blanks, to provide axial mounting holes, and to harden the respective surfaces of the blanks. The circumferential surfaces of the respective blanks are formed as friction surfaces.

Abstract: The die set for sizing sections includes a movable block and a stationary one, both blocks having cutout portions receiving a sizing die, movable knives and stationary knives forming a jig secured to the stationary block, the jig having made therein communicating channels arranged in accordance with the contour of the section, the jig further having grooves perpendicular to the channels for receiving the movable knives and interacting with the inclined surface of the cutout portion of the movable block.

Abstract: The objects of the invention are the manufacture of drawn foil containers which have better appearance and strength and which can be made with these advantages from thinner foil and with greater depth. The essential apparatus employed to achieve these objects having a punch for drawing the container, is characterized by upper and lower peripheral guide structures located around the punch which present a plurality of intercalating radially aligned ridge formations for forming in accordance with the process alternate upwardly and downwardly directed light indentations in a flat foil blank before it is drawn and lightly guiding the indented blank to fold into double fold pleats which are thereafter drawn over a drawing edge to form the walls of the container. The container produced is characterized by double fold pleats in its walls.

Abstract: A method and apparatus for resizing torque converter impeller drive shafts. The method comprises the steps of heating the hollow drive shaft to a malleable state, radially expanding the drive shaft to a dimension larger than its original diameter, and grinding and polishing the outside of the drive shaft to its original size. The apparatus comprises a power drive tool for radially expanding a worn drive shaft to a diameter larger than its original diameter.

Abstract: A split beveled retaining ring and method for constructing the same is characterized by a beveled groove seating flange being formed by bending the radially inner or outer edge portion of a split ring body at an angle to the plane of the ring body. A grinding operation may be employed to remove protruding material from the bent annular flange on the side of the ring opposite the groove seating surface thereon to provide a flat bearing shoulder normal to the ring axis while permitting enough of the beveled flange to be received in the groove for safe part retention. Alternatively, the part abutment surface of the ring body may be maintained in substantially the same plane as the terminal portion of the bent beveled flange either by indenting the ring body to form a new part abutment surface or by bending the groove seating flange twice in opposite directions.

Abstract: Disclosed is a piston ring including a spacer-expander spring member. In a preferred embodiment the ring is of cast iron and includes two axially spaced cylinder wall contacting lands. At least one generally rectangular inwardly facing spring receiving recess is formed in the interior wall of the ring to receive the spring member which is formed from a flat strip of metal in a "U" configuration with the legs thereof facing outwardly, preferably aligned with the lands on the ring. A plurality of slots are provided in the spring member dividing the periphery into a plurality of feet. In a preferred embodiment the feet are radiused as seen in plan view to a radius less than the radius of the pocket in which they fit. This has been found to reduce wear in the spring receiving groove and to reduce the tendency of the ring and spring to become united which is detrimental to performance and is a common problem in rings of this general type.

Abstract: A machine for the trimming of a pipe bend held in a die in a machine frame has two hydraulic rams mounted at 45.degree., the piston rod of each ram carrying one of a pair of rotary cutting devices for trimming respective ends of the pipe bend. Under the two hydraulic rams there are arranged, each on a respective inclined guide way and likewise at an angle of 45.degree. in the machine frame, movable swarf or burr removing chamfering devices moving to bring their rotary cutter head coaxially into engagement with a respective trimmed end of the pipe bend.

Abstract: In a method and equipment for refurbishing gas turbine blades a portion of each blade extending from the tip is rolled under pressure, the direction of rolling being towards the tip, to effect extension of the tip, after which the extended tip is machined to a predetermined overall length of the blade, the rolling being effected between a pair of rollers, one with a convex profile and the other with a concave profile corresponding to the inside and outside respectively of the aerofoil section of the blade, one roller being fixed and the other roller being movable by pressure applying means towards the fixed roller, a carrier for the blade being rotatable and slidable in a guide aligned with the position of closest approach of the rollers, and driving means being provided for rotating the fixed roller such that its periphery moves through the position of closest approach in a direction towards the guide for the carrier.

Abstract: A process for finishing a 15.degree. to 180.degree. pipe bend which has been preformed on a pipe bending press comprises submitting a preformed pipe bend at a temperature of 700.degree. to 900.degree. C. at which it leaves a pipe bending press to a hot sizing operation which includes trimming both ends of the pipe bend to precise dimensions to eliminate further finishing.

Abstract: A petalled tulip-shaped end of a transmission shaft is formed by a cold forging operation consisting of four stages. In a first stage a blank is formed to the approximate size of the component desired, one end of the blank being chamfered eventually to provide a stem. In the second forging operation the petals and stem of the component are roughed out by reverse and direct drawing respectively and a central recess having radial recesses branching off therefrom is formed in the end face of the blank remote from the stem. In the third forging operation the radial recesses and the lateral faces thereof are pushed in the direction of the stem to produce oblique ramps which are extended to provide surplus walls. The fourth and final forging operation involves a cutting off of these surplus walls.

Abstract: In order to overcome the limitations on availability of suitable steel strip or bars in widths to suit all diameters of agricultural discs, a method of manufacturing such discs comprises cutting blanks from rolled steel strip or bar having a thickness greater than the thickness of the finished discs and a width less than the diameter of the finished disc, the blanks having a length substantially equal to the diameter of the finished discs, rolling each blank in the direction of its width until that dimension has increased to not less than the diameter of the finished discs, and blanking out from each rolled blank a disc with a diameter not less than the diameter of the finished discs and with a central hole, the cross-rolling of the strip or bar necessary to achieve the required increase in width and reduction in thickness having the beneficial result in affording quality comparable with that of discs formed from cross-rolled plate or sheet.

Abstract: A flat metal plate is first formed into a suitable segment of a large generally spherical body. It is then properly positioned on a horizontal cradle and its edges cut vertically as if from infinity, i.e. so that they are all parallel. A cutter then traverses the pre-cut edge to form the proper contour for welding. The pre-cut edge itself forms an accurate fixed reference and cooperates with guides on the face of the curved plate to keep the axis of the milling cutter tool substantially perpendicular to the surface of the plate at the point of milling contact. When all segments are so made and then joined, the resultant generally spherical body will be within substantially closer tolerances.

Abstract: This invention relates to a wire processing machine comprising a die through which wire is drawn along a rectilinear path and a turning head downstream of the die at which the die-drawn wire is surface turned. The turning head is rotatably mounted in bearings which are oil-mist lubricated.