Abstract: The invention relates to a device and a method for forming, in which at least one spindle is driven in a rotating manner by means of a rotary drive, a workpiece is received on the spindle by means of a clamping means and clamped on the spindle and at least one forming roller is fed axially and/or radially relative to the workpiece in order to carry out a spinning or flow-forming process. In accordance with the invention provision is made for the spindle and the clamping means to be combined to a changing unit which is adjustable transversely to the axis of rotation, wherein the changing unit is adjusted between a forming position and a set-up position.

Abstract: A clutch cover for use with virtually any combination of make and model of engine components and method of making the same is disclosed. The clutch cover is made by spin forming a sheet of metal and removing material as needed to coincide with the corresponding engine components. Therefore, the exact design of the cover including attaching holes and apertures related to release levers may be quickly and easily formed in the clutch cover. Furthermore, a heat management system is provided that includes the addition of fins or other apertures through the clutch cover to increase the air flow to reduce the temperature within the clutch cover to cool engine components.

Abstract: A method of incrementally forming a workpiece. The method may include incrementally forming a stiffening feature on the workpiece and incrementally forming a part on the workpiece. A gap between forming tools may be decreased to reform the part.

Abstract: According to a method for forming an elliptical hollow cylinder, part of the elliptical hollow cylinder is formed into a circular hollow cylindrical shape by spinning. The forming method includes a first forming process for forming the part of the elliptical hollow cylinder into a circular hollow cylindrical shape by using an inside roller, and a second forming process for reducing a diameter of the part formed into the circular hollow cylindrical shape in the first forming process by using an outside roller. According to the forming method, it becomes possible to shorten time required for forming the part of the elliptical hollow cylinder into a circular hollow cylindrical shape by spinning.

Abstract: A device for manufacturing or processing work pieces consists of a preform (4.1), with a mandrel (1a) that is supported rotatably and parallel to a longitudinal axis (x) of the device, an associated chuck (1b) for clamping the preform (4.1) as well as a spindle sleeve (2a) that can be coupled with the mandrel (1a) and can be moved along the longitudinal direction (x), and with a forming unit (3) for forming the preform (4.1). The chuck (1b) is designed in a rotational fashion in relation to the mandrel (1a).

Abstract: A method of incrementally forming a workpiece. The method may include incrementally forming a stiffening feature on the workpiece and incrementally forming a part on the workpiece. A gap between forming tools may be decreased to reform the part.

Abstract: The present invention provides a mandrel mill and the like that is capable of not only enhancing the elongation ratio of the pipe or tube, but also suppressing a pinhole defect from occurring. The first means of the present invention provides a mandrel mill comprising a plurality of rolling stands in which two grooved rolls R11, R12 are disposed, respectively, the mandrel mill being characterized in that the roll diameter ratio for the first rolling stand and the second rolling stand is set at a value of 4.6 or over. The second means of the present invention provides a mandrel mill comprising a plurality of rolling stands in which three grooved rolls R21, R22 and R23 are disposed, respectively, the mandrel mill being characterized in that the roll diameter ratio for the first rolling stand and the second rolling stand is set at a value of 2.8 or over.

Abstract: A clamp for a disk rotation driving device has a centering hole which is fitted to an outer circumference of a centering projection of a hub of the disk rotation driving device. A clamping screw is screwed into an axial center of the hub whereby a fastening head of the clamping screw fastens the clamp to the hub and a contact portion of the clamp comes in contact with an information recordable magnetic disk attached to the hub and presses onto the disk in a rotation axis direction. The clamp includes a centering cylinder bent in an axial direction. The centering cylinder has a circumferential inner surface which defines the centering hole. The rounded section is provided along an edge of the centering hole and has a radius smaller than the thickness of the centering cylinder. The fastening surface is continuous to the rounded section.

Abstract: A clutch assembly for a vehicle transmission includes a housing defined by a wall having an annular configuration circumscribing a clutch axis. The wall extends between an open end and a floor. The floor extends inwardly from the wall toward the clutch axis. A plurality of splines formed in the wall and each is spaced from the open end of the housing. A snap ring retains clutch plates in the housing. The open end of the wall is deformed inwardly toward the clutch axis defining a retainer for retaining the snap ring within the housing.

Abstract: A method of producing a seamless, tubular product includes centrifugally casting a corrosion resistant alloy into a tubular workpiece having an inner diameter and an outer diameter. The method then removes material from the inner diameter of the workpiece and subjects the workpiece to at least about a 25% wall reduction at a temperature below a recrystallization temperature of the workpiece using a metal forming process. The metal forming process includes radial forging, rolling, pilgering, and/or flowforming.

Abstract: A method includes providing a shaft having a coupling section. The coupling section has a generally cylindrical exterior surface. The method includes applying a coating to the coupling section to form an engaging surface. The method further includes cold-forming the shaft and the coating such that a plurality of protrusions is formed in the engaging surface. The cold-forming of the shaft and the coating is performed contemporaneously.

Abstract: A method of forming a ring gear from a ring blank includes providing a mandrel having a central axis and an outer annular forming surface. The outer annular forming surface defines a plurality of forming elements having a forming element axis offset from the central axis of the mandrel. The ring blank has a ring axis and is placed over the mandrel generally aligning the central axis of the mandrel with the ring axis of the ring blank. A roll is provided having a roll axis that is generally parallel with the element axis. The roll is forced radially inwardly while circumscribing the central axis. The roll pivots around the roll axis deforming the ring blank radially inwardly forming teeth on an inner surface of the ring blank that coaxial with the element axis and offset from the mandrel axis.

Abstract: The present invention provides a spinning method of a work piece in a non-circular cylindrical shape capable of eliminating a swollen part, without causing any creases or depressions on the formed face, by performing spinning to the swollen part produced in a region near the minor axis of the work piece in a non-circular cylindrical shape.

Abstract: A method for producing a superconducting acceleration cavity having a stabilized quality, by which production cost is reduced by reducing the number of welding points. A dumbbell-shaped dumbbell cell (3) is formed by forming a recessed iris portion (3b) around the central part of a cylindrical pipe made of a superconducting material, a cup-shaped half cell (2) is formed by enlarging one opening and reducing the other opening of the cylindrical pipe made of a superconducting material, a plurality of dumbbell cells (3) are coupled by welding, and the each half cell (2) is welded to the opposite ends of the plurality of dumbbell cell (3), thus producing a superconducting acceleration cavity (1).

Abstract: A method of forming a ring gear from a ring blank includes providing a mandrel having a central axis and an outer annular forming surface. The outer annular forming surface defines a plurality of forming elements having a forming element axis offset from the central axis of the mandrel. The ring blank has a ring axis and is placed over the mandrel generally aligning the central axis of the mandrel with the ring axis of the ring blank. A roll is provided having a roll axis that is generally parallel with the element axis. The roll is forced radially inwardly while circumscribing the central axis. The roll pivots around the roll axis deforming the ring blank radially inwardly forming teeth on an inner surface of the ring blank that coaxial with the element axis and offset from the mandrel axis.

Abstract: There is provided a group III nitride crystal growth method capable of obtaining a material which is a GaN substrate of low defect density capable of being used as a power semiconductor substrate and in which characteristics of n-type and p-type requested for formation of transistor or the like. A growth method of group III nitride crystals includes: forming a mixed melt containing at least group III element and a flux formed of at least one selected from the group consisting of-alkaline metal and alkaline earth metal, in a reaction vessel; and growing group III nitride crystals from the mixed melt and a substance containing at least nitrogen, wherein after immersing a plurality of seed crystal substrates placed in an upper part of the reaction vessel in which the mixed melt is formed, into the mixed melt to cause crystal growth, the plurality of seed crystal substrates are pulled up above the mixed melt.

Abstract: The invention relates to a process for finish-machining of bearing positions on main bearing journals and connecting rod bearing journals of crankshafts for motor car engines, whereby the crankshafts have roundings between the bearing positions and transitions adjacent in each case to the bearing positions. The roundings are deep rolled with a deep rolling tool and then, while maintaining a distance interval to an individual transition in each case the bearing position concerned is machined with removal of material with a small cutting depth.

Abstract: A drawing apparatus is capable of releasing a material, the inner surface of which has been formed into a concavo-convex shape with drawing, from a mold with excellent release performance, even in the case where the concavo-convex part formed in the inner surface of the product is of a shape causing it to get caught in the direction of pulling out of the product against the mold. The mold is formed in a split structure having a concavo-convex surface shape and is contractible in diameter after the forming of the material.

Abstract: A method of forming a flange on a circular metal blank (1) has the following steps: By means of at least one pressure roller (3), a hub-type and/or conical structure is formed on the circular metal blank, and from the conical structure (4), a flange (7) is formed on the circular metal blank (1) by means of a subsequent treatment.

Abstract: A method for making a differential housing having a ring gear integrally formed therein includes the steps of providing a differential housing having an annular rim integrally preformed therein; supporting the differential housing between upper and lower halves of a rotatable holding tool such that the annular rim extends radially outwardly from the holding tool for movement therewith; providing a thickening tool having a tool surface engagable with the annular rim during rotation of the holding tool to form a thickened lip; and providing a gear forming tool engagable with the thickened lip during rotation of the holding tool, whereby a plurality of teeth are formed along the lip to form the ring gear.

Abstract: The invention relates to a vacuum-assisted method and a device for forming an essentially flat blank (12) of metal into a thin-walled, shell-type body (14), especially for performing the method in accordance with one of the preceding claims, that has a supporting structure (16) forming a mold chamber (18) that holds the blank (12) during increasing deformation into the thin-walled, shell-body (14), a device (20) allocated to the supporting structure (16) for clamping the blank (12) about its circumference (22) to the supporting structure (16), that seals the reverse face (24) of the blank (12) facing towards the mold chamber (18) against the front face (26) of the blank (12) facing away from the mold chamber (18), and a device (28) allocated to the mold chamber (18) that also communicates with the mold chamber (18) for applying a vacuum and evacuating the mold chamber (18), and at least one forming tool (50) applied to the front face (26) of the blank (12) is/are allocated to the supporting structure (16), an

Abstract: This invention relates to a unitary steel wheel as well as an apparatus and method for producing a unitary steel wheel. The unitary wheel comprises rim and disc components. In one embodiment, the unitary wheel further comprises approximately a 50 taper bead-seat for flat or semi-drop cantar rims, produced from a generally circular steel blank. The blank preferably has a cantar hole of predetermined size. In a first step, the blank is initially placed in a spinning machina to form disk and rim portions of a predetermined profila and shape. The preform is further spun and flow formed in the spinning machine, to form a gutter, well, bead-Seat, and/or fixed flange. The preform is then forward and reverse spun to form the final profila and shape of the gutter, wall, bead-seat, and/or fixed flange.

Abstract: A method of forming a circular sheet-metal blank which rests on a tool rotating about an axis. The sheet-metal blank has a thickness and has a diameter which is small than a diameter of the tool.

Abstract: A method for forming a part of deformed cross section with non-rotation symmetry on an end portion of a cylindrical workpiece. The method includes steps of performing a first relative motion of a roller against the workpiece toward its one open end, and performing a second relative motion of the roller against at least a part of outer peripheral surface of the end portion of the workpiece toward the inside thereof, while the roller is rotated relative to the workpiece by one rotation, in such a state as being held to be in contact with the end portion, in a plane which is perpendicular to the moving direction of the first relative motion, and which includes a position where the roller contacts the outer peripheral surface of the end portion, and performing a rotational motion of the roller relatively rotating around the workpiece, while performing the second relative motion, with the roller being held to be in contact with the outer peripheral surface of the end portion.

Abstract: The invention relates to a vacuum-assisted method and a device for forming an essentially flat blank (12) of metal into a thin-walled, shell-type body (14), especially for performing the method in accordance with one of the preceding claims, that has a supporting structure (16) forming a mold chamber (18) that holds the blank (12) during increasing deformation into the thin-walled, shell-body (14), a device (20) allocated to the supporting structure (16) for clamping the blank (12) about its circumference (22) to the supporting structure (16), that seals the reverse face (24) of the blank (12) facing towards the mold chamber (18) against the front face (26) of the blank (12) facing away from the mold chamber (18), and a device (28) allocated to the mold chamber (18) that also communicates with the mold chamber (18) for applying a vacuum and evacuating the mold chamber (18), and at least one forming tool (50) applied to the front face (26) of the blank (12) is/are allocated to the supporting structure (16), an

Abstract: This invention relates to a unitary steel wheel as well as the apparatus and method of producing a unitary steel wheel. The unitary wheel comprises wheel rim and disc portions. In one embodiment, the unitary wheel of this invention further comprise a one-piece wheel of 5° and 15° drop center rims, providing a generally circular steel blank from a sheet stock of pre-determined substantially uniform thickness. The bank preferably has a center hole having a predetermined size. The blank is performed in a spinning machine to a predetermined profile and shape. The perform is further spun and flow formed in a spinning machine, the perform being positioned between an outer roll and inner mandrel and held against a clamping plate. The inner mandrel comprises an outboard surface, which conforms to the predetermined inner diameter of the rim.

Abstract: A method of spinning multiple parts comprising attaching two blanks to an intermediate mandrel, loading the intermediate mandrel and blanks into the spinning machine by clamping the intermediate mandrel and the blanks between the spinning machine tailstock and the headstock, moving rollers simultaneously radially inward and outward to execute metal forming on each blank to form a part from each blank, ejecting the intermediate mandrel, and ejecting each part substantially simultaneously from the intermediate mandrel.

Abstract: A method and a device for straightening out irregularities in a flange by pressing a roller against a first side of the flange while supporting an opposite side thereof to preserve the angle between the flange and the part when undergoing compression loading by way of the roller.

Abstract: The present invention relates, among other things, to a method for forming a workpiece (240) of a material having an exponential tensile stress-strain behavior into a thin-walled, hollow shell (243). In this method, the workpiece (240) is clamped on its periphery and is actively rotated about its center line (M). A freely rotatable spinning die (4) having an external side (4a) with the desired shell shape (243) is pressed with a suitable pressure force against a workpiece side (24a).

Abstract: An aspect of the present invention relates to a method and a forming machine for working a workpiece, for example by deforming it or fixing it in another workpiece, in which the workpiece is fitted over a mandrel, at least a part of the mandrel is expanded so as to fix the workpiece, the workpiece and at least one tool, such as a forming roller, are rotated about an axis relative to each other and the workpiece is worked by means of said tool. The mandrel includes a stop adapted to engage the workpiece to obtain a desired axial position on the mandrel.

Abstract: At the time for forming an internal gear from a raw material 2 of an internal gear, first, the raw material 2 is externally inserted onto a forming die 3 and fixed to the forming die 3 through a pressing die 4. Next, a forming roll 5 is moved in a direction as indicated by an arrow B of FIG. 6 while rotating the forming die 3. By this, the inner peripheral surface of the raw material 3 is pressed against an outer gear part 3b formed on the outer peripheral surface of the forming die 3 so that an internal gear part 1c is formed on the inner peripheral surface of the raw material 2. The rotating direction of the forming die 3 is selected such that the first end part of the outer gear part 3b located on the front side in the feeding direction of the forming roll 5 is moved ahead in the rotating direction (the direction as indicated by an arrow A of FIG. 6) of the second end part located on the rear side in the feeding direction of the forming roll 5.

Abstract: Method of a spin forming conical fittings for HVAC systems from 10 to 26-gauge steel material. A flat pattern is cut, stamped or otherwise formed from flat sheet stock or roll stock. The pattern is rolled or otherwise formed into a frustoconical shape. The workpiece is engaged with a die, and the end portions of the workpiece are formed as the workpiece is spun to press the workpiece against the die. In this manner, a small diameter collar portion is formed at the smaller end of the conical connector and/or a larger diameter collar portion is formed at the larger diameter end of the conical connector. Also, a flange connector can be formed at the larger and/or smaller end portions of the conical connector using spin forming or a combination of spin forming and roll forming techniques.

Abstract: A method of manufacturing an elliptic deep-drawn product including a first step of providing an intermediate product and a second step of providing an end product. In the first step, a rotary forming die is used to form in a blank a substantially round formed portion of a U-shaped cross-section. In the second step, the formed portion is deformed at its semicircular portion by press working to form an elliptic portion, being formed into a final shape.

Abstract: There is provided a mandrel for spin forming that has a backing plate with removably attached mandrel portions and mandrel spacers, such that the mandrel is adaptable to numerous configurations. The various configurations of the mandrel are used to provide different spin forming contour surfaces upon which metal sheets or other spin formable materials can be spin formed. The adaptable mandrel also provides the ability to create a desired spin formed product from either a single metal sheet or multiple metal sheets joined by friction stir welding or other suitable processes. A spin formed welded metal sheet may also undergo a trimming process to remove the portions of the welded metal sheet having sufficiently different material properties resulting from the weld process, including the weld joint.

Abstract: A jewelry chain section and a method of forming the same having a spiral, twisted appearance, involves the winding of a wire on a support and the controlled manipulation of such wound wire during or after removal from the support. The wound wire comprises individual spirals that are twisted relative to each other, such that the individual spirals appear in a staggered formation, with the appearance of a chain section being varied by the number of spirals that are twisted at a particular time and the extent or angular dimension of the rotation imparted to such spirals.

Abstract: A rolled ball screw has a screw shaft having a ball screw groove so as to engaging with rolling elements of a ball screw, the screw shaft is formed by rolling while a thread rolling die is pressed against a cylindrical bar-shaped member to thereby roll the ball screw groove, wherein the number of waves per circumference per lead of said ball screw groove is set different from the integer multiples of the number of said rolling elements per lead of said ball screw groove.

Abstract: A flow-forming method and apparatus, in which a blank is placed on a rolling mandrel of a flow-forming machine, the blank is rotated relative to at least one flow-forming roll, the at least one flow-forming roll is infed radially and/or axially relative to the blank, and the blank is axially lengthened by the flow-forming roll and flow-formed to a workpiece.

Abstract: The present invention enables to firmly assemble a steel-frame structure. To form a steel-frame structure or to join two steel members being reinforcing members thereof, a slip-proof surface having one or plural concentric higher parts and grooves is formed on the joined surface of one side or both sides of the steel members, and these two steel members are clamped by a connecting member that passes through connecting holes in the state where the first and the second slip-proof surfaces are mutually engaged or not engaged. Thus, joining force between the joined surfaces is increased.

Abstract: A method is provided for forming a catalytic converter that includes a catalyst substrate having a noncircular circumference and surrounded by a metal housing. The catalyst substrate is initially measured to determine the radial dimension of the substrate circumference relative to a central axis. The substrate is wrapped in a compressible mat and arranged within a metal tube. The arrangement is subjected to a spin-forming process that forms the metal tube about the catalyst substrate. The spin-forming process includes rotating the metal tube about the substrate axis, while concurrently urging a metal-forming tool against the metal tube. The metal-forming tool is programmed to follow a metal-forming path corresponding to the substrate circumference plus a predetermined radial distance. In this manner, a metal housing is formed having a noncircular circumference corresponding in shape to the catalyst substrate and spaced apart by a uniform insulative layer.

Abstract: A cylindrical workpiece (20) is mounted onto and connected to a mandrel (14) that is itself mounted for rotation about a vertical axis (12). A first end portion of the workpiece (20) is housed within the mandrel (14). A second end portion projects axially outwardly beyond a radial forming surface (60) on the mandrel (14). A first forming roller (30) is mounted on a swing post (52) that is positioned by an adjustable length strut (56). The strut (56) is elongated to swing the post (52) downwardly and place the roller (30) inside the second end portion of the workpiece (20). Then, a lead screw (28) is used for pulling on a base (50) that supports the post (52). This pulls a convex face portion (32) of the roller (30) against the inside of the second end portion of the workpiece (20). Lead screw operation moves the roller (30), causing it to stretch the second end portion of the workpiece (20) and move it up onto and then move it radially outwardly along the forming surface (60).

Abstract: A method of flow forming in a tensile direction. More particularly, it comprises flowing the metal on the surface of a sheet (or plate) metal blank from a center radially outwards. A roller is initially engaged near or at the center of a rotating metal blank. The roller is then moved radially outward to the edge of the metal blank, gathering the metal as it moves. A mandrel tool surface is used to accumulate the gathered metal to form a predetermined shape at the edge of the workpiece, such as v-belt or multi-ribbed v-belt profile, or gear or sprocket tooth profile.

Abstract: A composite brake drum for use in a drum brake assembly includes a one-piece mounting flange and shell and a liner cast integrally in a shell portion thereof.

Abstract: The invention related to a method for producing a rim for a pneumatic tire. A rim base with a rear rim flange is produced from a ring-shaped blank by exerting pressure. Said rim base is then connected to a bowl of a rim at the side thereof facing away from the rear rim flange. In order to produce said rim base, the blank is inserted into a compression mould which is embodied as a cavity and is pressed against the at least partially contoured interior of the compression mould by means of at least one compression roll.

Abstract: The invention relates to a plate for a spin drum in a centrifuge. The plates contain integrally formed spacers. These plate spacers are comprised of plate material thickenings and are designed to maintain an intermediate space between two or more plates stacked on top of each other. To create this design, the invention includes a process for the manufacture of the plate as defined above. This process includes the step of roll-pressing a blank over a cone shaped mandrel provided with depressions conforming to the shapes of the spacers of the plate. During this rolling process, the spacers are formed when the depressions in the mandrel are filled with the material of the blank. To ease in the formation of these spacers, the blank may be heated prior to rolling.

Abstract: The present invention provides a method of manufacturing a poly-V pulley made of metal sheet, which can be easily produced from a thick flat-plate material. By this method, the poly-V pulley is formed to have a two-part arrangement of poly-V grooves having different diameters, i e., a small diameter and a large diameter. A circular flat-plate material having a boss portion at the center thereof is bent, thereby forming a first forming body whose section is dish-shaped. The first forming body includes a supporting base and a conical peripheral portion consecutively disposed so as to be inclined and widened from the outer peripheral end of the supporting base portion in the outward direction. Next, the conical peripheral wall is extended in the widening end direction so as to decrease the thickness thereof, thereby forming a second forming body whose section is also deep dish-shaped.

Abstract: According to the invention, a press roller device (1) for molding a grooved structure inside a tubular workpiece (7) has several press rollers (4,5,6), said press rollers rotating around a form tool (2) and being staggered axially in relation to one another. At least two of the press rollers (4,5) are driven in opposite directions to each other. This arrangement prevents the workpiece from twisting to a large extent.

Abstract: A forming machine for forming a workpiece having a rotatably drivable gripping device. The gripping device comprises a first forming tool and a press-on tool adapted to press the workpiece in the direction of the first forming tool. The forming machine further comprises a second forming tool mounted at least substantially co-axially round the press-on tool. The second forming tool can be moved along the press-on tool.

Abstract: In a flow-forming method, an axially symmetrical first workpiece is fixed on a spinning mandrel, which together with the workpiece is rotated. At least one spinning roll is infed. The workpiece is formed and shaped while on an axially extending external profile of the spinning mandrel. A spacer is mounted on this spinning mandrel. A marginal area of the workpiece is shaped on an area of the spacer, the latter being plastically deformed during the shaping of the marginal area of the workpiece. Also, a flow-forming apparatus has a spinning mandrel on which a workpiece can be fixed, a drive by which the spinning mandrel and workpiece can be rotated together, and at least one spinning roll for shaping the workpiece in a forming area. The deformable spacer has an overlap area. During workpiece shaping, the overlap area at least partly overlaps with the forming area of the workpiece.

Abstract: Methods for manufacturing a water hammer arrester having an endurance against pressure of a fluid as well as excellent productivity. There is provided Methods for manufacturing a water hammer arrester comprising steps of: deforming plastically an end of a work piece for a housing to close it by pressing the end toward a center thereof while the work piece is rotated at high speed, the work piece is a brass pipe having predetermined length; forming a housing by cutting a closed part in prescribed thickness; filling up a gas and inserting a piston within the housing to prevent the gas from leaking; forming a connecting part having smaller diameter than the housing by pressing an outside of an open end of the housing provided with poured gas and the piston; and mounting a connector to the connecting part.

Abstract: A roller levelling machine for levelling a rolled section includes a section inlet for introducing the rolled section into the roller levelling machine and a plurality of bending rollers for levelling the rolled section. The roller levelling machine further includes at least one runout roller which is adjustable by an adjusting element for guiding the levelled rolled section. A position sensor device for determining the location of the rolled section is arranged following the runout roller at a predetermined distance from the runout roller. For transmitting the location, the position sensor device is connected to an adjusting control unit for the runout roller. The control unit is capable of determining from the determined location an adjusting signal for the adjusting element and transmitting the adjusting signal to the adjusting element. The adjusting element is configured to adjust the runout roller in accordance with the adjusting signal.