Abstract: A method for forming a dome used in a launch vehicle includes cutting a disk from a plate, the disk having a first disk diameter. The method also includes forming a bend in the disk, the bend applying a curvature to at least a portion of the disk, the disk having a second disk diameter after the forming. The method further includes performing a first heat-treating process to the disk. The method also includes performing a second heat-treating process to the disk. The method further includes machining the disk to remove at least a portion of a thickness of the disk.

Abstract: A mandrel bar of a piercing machine includes: a bar body; a coolant channel formed inside the bar body and through which a coolant flows; an inner surface cooling mechanism which is disposed in a cooling zone and is connected to the coolant channel and which, during piercing-rolling or during elongating rolling, ejects the coolant to outside of the bar body to cool an inner surface portion of a hollow shell inside the cooling zone; and an inner surface damming mechanism which is disposed adjacent to the cooling zone on a rearward side of the cooling zone and which, during piercing-rolling or during elongating rolling, suppresses the coolant that is ejected to outside of the bar body from contacting the inner surface portion of the hollow shell that is positioned rearward of the cooling zone.

Abstract: A multi-axis roll-forming method includes simultaneously (a) spinning, about a rotation axis, a spin platter having placed thereon a ring encircling the rotation axis, (b) pressing at least one first roller against outward-facing surface of a first portion of the ring to press the first portion against an outward-facing surface of the spin platter, and (c) forcing a second roller against an outward-facing surface of a second portion of the ring to bend toward the rotation axis the second portion, so as to form a lip extending toward the rotation axis, wherein the step of forcing includes (i) pivoting the second roller against the second portion, and (ii) translating the second roller along the second portion toward the rotation axis.

Abstract: The invention relates to a method and a device for incremental forming of a metal workpiece, having at least one spindle, on which the workpiece is clamped, and at least one spindle drive, with which the at least one spindle is set in rotation with the workpiece and/or at least one forming roller is set in rotation relative to the workpiece, wherein the at least one forming roller is advanced radially and/or axially relative to the rotating workpiece by way of at least one actuator. According to the invention, a computer-based controller is provided which records multiple machine parameters via sensors, which parameters comprise at least a rotation speed of the spindle, a position of the forming roller and forming forces and/or an advancement speed of the forming roller, and process parameters and/or workpiece parameters are also recorded by the controller, and the controller creates at least one data set in which the machine parameters are assigned to the process and/or workpiece parameters.

Abstract: In a localized torsional severe plastic deformation method for conical tube metal, a desired region of a conical tube metal can be subjected to severe plastic deformation using molds in which roughness is formed at predetermined regions. The method includes roughening a predetermined region of each of the molds; sticking the conical tube metal only to the roughened regions of the molds; moving the lower mold toward the upper mold to apply a load to the conical tube metal; and rotating the molds to apply severe plastic deformation to the conical tube metal only at the regions stuck to the roughened regions of the molds.

Abstract: In a method for closing open ends of tubes, an open tube end is closed using spin-tubing methods known in the art. Following the tube end closing, a concavity is formed in the tube end in a tube end forming machine. The tube end is brazed with the tube end facing upright, so that the braze alloy pools in the concavity, strengthening the tube end.

Abstract: Provided is a fixing sleeve making it possible to reduce the surface roughness of the inner circumferential surface of the fixing sleeve by spinning, and a method for manufacturing the fixing sleeve. The spinning is performed by moving rollers, in the axial direction of a cup-shaped tubular body and, at the same time, a burnishing tool (spherical tool) is pressed against the outer circumferential surface of the cup-shaped tubular body after the spinning, and the burnishing tool is moved in the same direction as the rollers. The cup-shaped tubular body is plastically deformed in the axial direction of the cup-shaped tubular body, reduced in wall thickness, and elongated in the axial direction.

Abstract: The invention relates to a method for shaping an essentially flat-surfaced blank (10) to form a shell body (34), comprising the following steps: forming at least one flat-surfaced, buckling-stable insert (12) which is adapted to form, dimension and deformation properties of the flat-surfaced blank (10); forming a blank (14) to be deformed and at least one buckling-stable insert (16, 16?, 16?) to be deformed from the flat-surfaced blank (10, 10?) and the at least one flat-surfaced buckling-stable insert (12, 12?); placing and clamping the blank (14) to be deformed and the at least one buckling-stable insert (16, 16?, 16?) relative to one another and deforming the blank (14) together with the at least one buckling-stable insert (16, 16?, 16?) to be deformed in order to form the shell body, using at least one forming tool (32) that acts upon the front or inner side (20) of the blank (14) to be deformed or the at least one insert (16) to be deformed which is provided as a support.

Abstract: A method of making a seamless, tubular article comprises subjecting a cast tubular workpiece of a corrosion resistant alloy to at least about a 25% wall reduction at a temperature below a recrystallization temperature of the workpiece using a metal forming process comprising at least one of radial forging, rolling, pilgering, and flowforming. The cast tubular workpiece is a centrifugally cast tubular workpiece comprising an inner diameter and an outer diameter.

Abstract: A method of making a seamless, tubular article comprises subjecting a cast tubular workpiece of a corrosion resistant alloy to at least about a 25% wall reduction at a temperature below a recrystallization temperature of the workpiece using a metal forming process comprising at least one of radial forging, rolling, pilgering, and flowforming. The cast tubular workpiece is a centrifugally cast tubular workpiece comprising an inner diameter and an outer diameter.

Abstract: The invention relates to a process for forming a pipe portion, in which process a base having an opening and having an inwardly projecting collar is formed. It is provided that the pipe portion is made to rotate, that the pipe portion is drawn in by means of a forming roller, with the base being formed by the drawing-in process, that an inwardly projecting material thickening is formed integrally in the base and that an opening is made in the base in the region of the inwardly projecting material thickening, wherein the inwardly projecting collar is formed by at least part of the inwardly projecting material thickening. Furthermore, the invention relates to an apparatus for forming a workpiece.

Abstract: Surfaces of magnesium-base alloy workpieces may be mechanically worked and deformed to increase their resistance to corrosion, especially corrosion occurring in the presence of water or water and salt or other corrosive media. Workpiece surfaces that are to be thus protected are engaged in squeezing, sliding, and frictional contact with a suitable burnishing or other working tool that traverses the surface to compress and deform it and to refine the metallurgical grain structure. For example, the grain size is reduced in a surface layer that may extend to a depth of up to a few millimeters. And grain orientation is altered within that depth. The tool is not employed to intentionally remove material from the surface of the workpiece. The initial dimensioning of the workpiece may take into consideration the alteration of surfaces by the mechanical working process.

Abstract: An Fe—Ni alloy pipe stock containing, by mass %, C?0.04%, Si?0.50%, Mn: 0.01 to 6.0%, P?0.03%, S?0.01%, Cr: 20 to 30%, Ni: 30 to 45%, Mo: 0 to 10%, W: 0 to 20%, with Mo(%)+0.5W(%): more than 1.5% to not more than 10%, Cu: 0.01 to 1.5%, Al?0.01% and N: 0.0005 to 0.20%, and the balance being Fe, with 1440?6000P?100S?2000C?1300, Ni+10(Mo+0.5W)+100N?120, (Ni?35)+10(N?0.1)?2(Cr?25)?5(Mo+0.5W?3)+8?0, can be manufactured into a seamless pipe by use of a Mannesmann piercing and rolling mill because of its excellent inner surface properties. The resulting seamless pipe has excellent mechanical properties and moreover has excellent corrosion resistance in a sour gas environment.

Abstract: A hemming station is configured for hemming a panel assembly including an outer panel having a hem flange defined by a hem edge. The hemming station includes a roller configured to fold the hem flange, a heating device configured to heat the hem edge, and a control unit. The control unit is configured to control the roller and the heating device such that the roller folds the hem flange when the temperature of the hem edge is in a predetermined temperature range.

Abstract: A spinning method for making a seamless filter housing 50 with an elliptical bottom 52 and a bottom opening 58 for a drain port. An inlet port 62 is added after fabrication along with any optional sensor ports 64. The seamless filter housing 50 made with this process.

Abstract: The present invention teaches rolling a seamless tube, typically with a large diameter. The system comprises a furnace for heating billets produced by continuous casting. The system comprises a piercing mill for longitudinally piercing the heated billets to obtain a pierced blank. The system comprises an expanding-elongating mill for expanding the pierced blank diameter and for elongating the pierced blank to obtain a semi-finished tube. The system comprises a continuous main rolling mill with adjustable rolls for mandrel-rolling a semi-finished tube. The system comprises a fixed-roll extracting-reducing mill positioned downstream of the main rolling mill. The extracting-reducing mill extracts the semi-finished tube from the mandrel, reducing the diameter to a predetermined value close to that desired for the finished tube. The system comprises an adjustable-roll sizing mill to adjust the radial position of the rolls and define the diameter of the outgoing tube.

Abstract: A spinning method for making a seamless filter housing 50 with an elliptical bottom 52 and a bottom opening 58 for a drain port. An inlet port 62 is added after fabrication along with any optional sensor ports 64. The seamless filter housing 50 made with this process.

Abstract: Detection of fault occurrences within a power distribution system. A transient detector and fault classification system (10) implements an algorithm that detects transients which may result from the occurrence of a fault in the power distribution system. The system includes a detection module (18) which processes a set samples obtained from electrical waveforms propagated of through the power distribution system and appear to be statistically anomalous compared to other sample data. This is done using an adaptive detection algorithm that is applied when large changes occur in a waveform over a relatively short period of time. The identified samples are then provided to a signal classifier module (20) which processes sets of samples to classify a transient they represent as a likely fault occurrence or some other type of anomaly which is likely not a fault occurrence.

Abstract: Roll forging of an annular article of manufacture is accomplished with electric induction heating of the workpiece simultaneously during the roll forging process as required to keep the workpiece at optimum forging temperature during the roll forging process.

Abstract: A method of metal surface hardening treatment inducing transformation, in which transformation is induced in a surface interior of material as hardening treatment object by simple, rapid treatment utilizing a frictional heat under pressure without the occurrence of melt loss, quench crack, soft spot, deformation, etc. to thereby reform the structure of surface interior of material as hardening treatment object into a miniaturized martensitic structure.

Abstract: A bending apparatus has (a) a first manipulator which feeds a hollow metal blank of closed cross section in its lengthwise direction, (b) a second manipulator which supports a first support means disposed at a first position and a metal blank while feeding it, a heating means disposed at a second position downstream of the first position in the blank feed direction for heating all or part of the circumference of the blank, and a cooling means disposed at a third position downstream of the second position for cooling a portion of the heated blank, and (c) a third manipulator which constitutes a second support means disposed at a fourth position downstream of the third position in the feed direction of the blank and which moves two-dimensionally or three-dimensionally while supporting at least one location of the metal blank to bend the metal blank into a desired shape.

Abstract: A closing machine (1) for closing a rotating work piece (9) by pressing a heated die (4) against the work piece (9) comprises an air purge box (510) which opens onto the vicinity of the work piece (9), air supply means for supplying air to the air purge box (510), and a sensor (501, 502) provided in the interior of the air purge box (510) to detect a state of the work piece (9) or the die (4).

Abstract: In the production of a seamless steel tube by piercing-rolling a heated billet with a piercing machine to form the billet into a hollow blank, and without reheating the hollow blank, by successively subjecting the hollow blank to elongation-rolling with an elongation-rolling mill and diameter-adjusting rolling by a diameter-adjusting rolling mill, it is made possible to prevent non-uniform longitudinal temperature distribution from occurring in a steel tube after diameter-adjusting rolling and enable energy saving to be accomplished by including a step 1 of measuring a temperature of the hollow blank along a longitudinal direction at the exit of the elongation-rolling mill; and a step 2 of spraying water onto the hollow blank to cool the hollow blank at the entrance of the diameter-adjusting rolling mill according to a measured longitudinal temperature distribution of the hollow blank, whereby the longitudinal temperature distribution of the hollow blank becomes uniform.

Abstract: The invention relates to a charging device for a bush expander for punched bush blanks, having a charging weight of, in the warm state, many hundreds of tonnes, for example 200 to 800 tonnes, preferably 200 to 600 tonnes, and to a method for forging punched bush blanks.

Abstract: A spinning method for making a seamless filter housing 50 with an elliptical bottom 52 and a bottom opening 58 for a drain port. An inlet port 62 is added after fabrication along with any optional sensor ports 64. The seamless filter housing 50 made with this process.

Abstract: Disclosed is a method for producing a seamless pipe by using a piercing mill which pierces and rolls a round billet heated to 1300° C. or lower, wherein the piercing mill is composed of a pair of skew rolls disposed to face each other around a pass line, a pair of guide devices disposed to face each other around the pass line, and a plug disposed along the pass line, between the pair of the skew rolls and also between the pair of the guide devices, wherein the piercing-rolling is performed under the conditions satisfying the following formulas (1) to (3) to prevent wrinkle flaws of the seamless pipe: ?1.0<????(1) ??=?p??r??(2) ?0.37×??+1.47?Rn?0.37×??+2.

Abstract: Pipe-swelling can be prevented by piercing-rolling a high-alloy steel billet heated to a temperature range from 900 to 1250° C. with a piercing mill equipped with main rolls having a surface roughness Rmax of 150 to 500 ?m. A ratio (the gap WG of guide rolls/the gap WR of the main rolls) is preferably at 1.10 to 1.20. The difference (?P??R) is preferably set at 0 to 3.0°, where ?R is an angle between an exit-side face of each of the main rolls of the piercing mill and the pass line; and ?P is an angle between a rolling face of the piercing plug and the pass line.

Abstract: a billet made of high Cr-high Ni alloy, which contains, by mass percent, 20 to 30% of Cr, 30 to 50% of Ni, and at least one element selected from Mo and W with a value “Mo+0.5W” of 1.5% or more is heated under conditions satisfying the following formula (1), and then the billet is pierced and rolled using an inclined roll type piercing mill with a roll gouge circumferential speed of 2.28 m/sec or higher. This prevents melted rash on the inner surface and lengthens the plug life. T?1575?4.45×Vf?104.7×{?ln(th/ro)}??(1) wherein T indicates a heating temperature (° C.) of the billet, Vf indicates the roll gouge circumferential speed (m/sec), ro indicates a radius (mm) of a billet at an entry-side, and th indicates a radial thickness (mm) of a pipe after piercing.

Abstract: A hot forging facility enabling the manufacture of a hot forged product excellent in fatigue properties and cold workability is provided. A heating furnace for heating a steel material and a hot forging apparatus for performing forging of the heated steel material are sequentially arranged on a transport line. A partially cooling apparatus/apparatuses for partially cooling a forged product after hot forging is provided on an exit side of the hot forging apparatus.

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: a billet made of high Cr-high Ni alloy, which contains, by mass percent, 20 to 30% of Cr, 30 to 50% of Ni, and at least one element selected from Mo and W with a value “Mo+0.5W” of 1.5% or more is heated under conditions satisfying the following formula (1), and then the billet is pierced and rolled using an inclined roll type piercing mill with a roll gouge circumferential speed of 2.28 m/sec or higher. This prevents melted rash on the inner surface and lengthens the plug life. T?1575?4.45×Vf?104.7×{?ln(th/ro)}??(1) wherein T indicates a heating temperature (° C.) of the billet, Vf indicates the roll gouge circumferential speed (m/sec), ro indicates a radius (mm) of a billet at an entry-side, and th indicates a radial thickness (mm) of a pipe after piercing.

Abstract: The present invention relates to an apparatus for attachment to a conventional sheet metal forming press. The apparatus allows the sheet metal forming process to be preformed fully submerged in an oil. Methods for sheet metal forming in oil are also provided.

Abstract: An apparatus for rotating a container body that utilizes frictional forces rather than the engagement of gears to rotate the container body is provided. Such an apparatus may include a stationary housing and a turret rotating on a shaft proximate to the housing. The turret may have a plurality of pockets and a roller assembly disposed within each pocket. Each roller assembly may have a body portion and a drive roller portion. Each body portion may have a contact portion for contacting a container body received in a respective pocket. Each drive roller may be in contact with the housing such that as the turret rotates, friction between the drive rollers and the housing causes each roller assembly to rotate.

Abstract: A method of producing a light alloy wheel with a forging technique, aiming for producing the wheel having a large-diameter disk by use of a small-scale press device, comprising: heating an intermediate product that is formed by casting or forging and has a discoid and a cylindrical thick wall, which are to respectively become disk and rim at completion, to a plasticity temperature; then, rotating the intermediate product with stopping of the rotating at interval of a predetermined angle; pressing at least a portion of the to-be disk part by molds at time of said stopping, as to push out metal into recesses on the lower mold and to thereby form holes; repeating of such rotating, stopping and pressing as to give a pattern on whole of the to-be disk part; and further press processing and finish processing on the to-be disk and the to-be rim parts.

Abstract: An apparatus for forming a workpiece to a desired, non-planar configuration are provided. At least one friction stir forming tool, having a shoulder and a pin, is used to urge the workpiece to the desired configuration and friction stir form the workpiece. The forming tool can urge the workpiece against a contour surface of a die or a shoulder that is opposite the structural member from the tool. Thus, the forming tool plasticizes a portion of the workpiece and urges the workpiece to the desired configuration. In addition, the material properties of the workpiece can be improved by the friction stir processing.

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: Method of forming a workpiece comprising (a) providing a tool and a workpiece, wherein the workpiece has an initial shape; (b) placing the workpiece and the tool in contact, applying force to the tool and/or the workpiece, and moving the tool and/or the workpiece to effect a change in the initial shape of the workpiece by forming; and (c) providing a jet of cryogenic fluid and impinging essentially all of the jet of cryogenic fluid on a surface of the tool.

Abstract: A machine arrangement includes a plurality of machines arranged to cooperate with each other in a manner which comprises a machine line. This machine line incorporates apparatus which is associated with and/or comprises part of the machines for: at least one of moving, holding, manipulating and shaping cans as they pass from a can infeed to a can discharge of the machine line and move along a path having a predetermined configuration. This apparatus minimizes operations necessary for changing from a set up suitable for modifying a can having a first set of dimensions to a set up suitable for a can having a second set of dimensions.

Abstract: A method of manufacturing a clutch housing having a boss portion and a drum portion integrally provided with the boss portion, is characterized by steps of integrally forming the boss portion and the drum portion by hot forging, and forced-cooling at least a portion of the boss portion, continuous to the integrally forming step.

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: A method for bending a tube in a pre-selected geometry includes deriving at least one processing parameter from the geometry, applying a thermal source circumferentially to the tube to heat the tube along at least one circumferentially directed path in accordance with the parameter and actively cooling the tube to a pre-selected temperature. The applying and active cooling steps are alternately performed a number of times. A system for bending the tube includes a thermal source for heating at least one region along the path on the tube, a tube advancing module for advancing the tube, an active cooling module for cooling the tube to a pre-selected temperature, a processing module to derive at least one processing parameter from the geometry and a control module configured to control the thermal source and active cooling module in accordance with the parameter. The alternate heating and cooling are performed a number of times.

Abstract: An incremental forming apparatus 100 holds a workpiece 10 onto a table 110. A spindle is disposed perpendicularly above table 110. For incremental forming, an incremental forming tool 150 is mounted on the spindle, and a form portion 20 is formed on the workpiece 10. When incremental forming is completed, the tool on the spindle is replaced with a straightening tool 200, and hot air is blown out from the straightening tool 200 to anneal the edge lines 20a and 20b of the form portion 20 and to eliminate process strain.

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 method for making an intricately-shaped axisymmetric part having a central portion and a peripheral portion, comprises simultaneously rotating a blank structure fixed on a shaft and forming a peripheral portion of the blank using a forming tool having at least three degrees of freedom (i) at a temperature above 0.4 the blank melting point but below the temperature of secondary recrystallization, (ii) at a rate of from 10−3 to 102 s−1, and (iii) for a rotation period to effect stress relief in the portion being formed.

Abstract: A fuser roller is obtained by heating a blank over predetermined regions starting from both the opening ends, and then necking the heated regions of the blank by moving a forming roller with rotation on the heated regions through the external pressing of the forming roller against the heated regions of the blank being rotated on its axis to draw form sidewalls integrally at both ends of a cylindrical body of the blank, respectively, and draw form cylindrical shafts integrally with the sidewalls, respectively. In this manner, the fuser roller can be fabricated using a single processing machine with respect to a single pipe member, which reduces equipment cost, further enhances production efficiency and implements low-cost production of fuser rollers.

Abstract: Seamless tubing of a nonferrous material is made by continuously and concomitantly advancing a tubular workpiece of the nonferrous material along an axis through a rolling station, radially squeezing the workpiece in the station between external rolls and an internal mandrel to radially reduce a wall thickness of the workpiece and increase an axial length of the workpiece so that the workpiece is heated, and spraying a liquid coolant against the workpiece in and upstream of the station to maintain the workpiece at a temperature below a recrystallization temperature of the material.

Abstract: A mold for shaping end portions of glass tubes has first and second mating members which define a contoured bore into which the heated tube fits. Each member has a longitudinal bore from which extend radial bores opening into the interior cavity of the mold containing the tube. Each member also has radial vent bores for venting gases and vapor to the outside. Each longitudinal bore is connected to a lubricant, such as water, supply, which is applied to the surface of the tube through the radial bores.

Abstract: Via a first path (P1) which extends for continuous treatment from one longitudinal end to the other of a cylinder head (H) passing between pairs of exhaust ports (15) and pairs of intake ports (14) opposed to each other with respect to one cylinder and which terminates in a tension bolt hole (21), and via second paths (P2P5) which, after treatment by this first path (P1), extend for successive treatment from cylinders adjacent the terminal point of the first path (P1) and between a pair of exhaust ports (15) and a pair of intake ports (14) opposed to each other and which terminate in tension bolt holes (21), the surface of the cylinder head (H) is stirred for refining without melting it by the heat from a rotating tool.

Abstract: A rotary forging and quenching apparatus and method forms and rapidly cools an axial-symmetric object from a spin formable material. The process uses a preheated billet which is clamped between opposed fixture mandrels which have a circumferential die shape and with quench solution channels running through the fixtures. The mandrels are spun and at least one contour roller of a mating circumferential die shape is brought into bearing contact against the billet in order to spin-form the material into the desired die shape. The mandrel and peripheral margin of the spinning billet are flooded with a quench solution coolant while being spin formed. This process streamlines the manufacturing of wheels or other axial-symmetric parts like cylinders, hemispheres, cones, etc. Typically, parts that require heat treatment, like aluminum alloys, will benefit from this process. The process minimizes the distortion encountered in heat treatment and eliminates the need to add extra material to ensure final dimensions.

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.