Abstract: Press apparatus and methods for manufacturing hot formed structural components are provided. The apparatus comprise a fixed lower body, and a mobile upper body. The apparatus comprise a cooling tool and a press tool which is arranged downstream from the cooling tool, and a blank transfer mechanism to transfer the blank from the cooling tool to the press tool. The cooling tool has an upper gas cooling tool connected to the mobile upper body and/or a lower gas cooling tool connected to the fixed lower body. The press tool comprises an upper pressing die connected to the upper body and a lower pressing die is connected to the lower body.

Abstract: A method of and device for manufacturing a hollow anchor with a radial, helical contour on its outer surface is provided. The contour is preferably a raised external contour or helix that is formed on the outer wall of the anchor and is suitable for tapping a thread in masonry. The hollow anchor formed by the method has an internal cavity that can receive another member and an outer surface with a raised external contour that is suitable for tapping a thread in a blind bore in a masonry member.

Abstract: A method for hot forging at least one end of a steel reinforcing bar (i.e., a rebar) to simultaneously form a wide head and threads funning around the head during a single step whereby to enable the bar to be coupled end-to-end an adjacent steel bar to be used, for example, to reinforce a precast concrete structure. The end of the bar is first preheated, and the heated end is surrounded by a closing die having a threaded geometry. The die is then nested within and closed around the heated end by an annulus ring of a hydraulic press, or the like. A hydraulic ram of the press is moved through the annulus ring and into engagement with the heated end of the rod so as to apply a compressive force thereto. The metal of the heated end flows into the die so as to be enlarged therein and assume the threaded geometry of the die.

Abstract: An apparatus (10) for forming an article by forging. The apparatus comprises at least one die (12) having a die cavity (14) to receive material, said material (16) being at least partially molten, and at least one punch (20) adapted to slidably engage the die cavity and to exert a forming pressure on material disposed in the cavity. There is also at least one pin (24) for forming an article feature. The pin is adapted to slidably engage the die and to contact the material, the pin being further adapted to recede upon exertion of the forming pressure and to exert a feature forming pressure when receded and thereby form the article (30) having the article feature when the material solidifies under the forming pressure.

Abstract: A forging device for producing a piston blank has a forging mold that has an essentially cylindrical cavity matching the radial outer surface of the piston blank, a forging base delimiting the cavity, and a central die consisting of a mandrel that has a conically tapering extension which is mounted on the mandrel and the shape of which matches the inner surface of the piston blank. In order to form the radially outer surfaces of the piston slipper walls and a peripheral cooling pocket located radially outside the slipper walls in the piston head, the forging device has two lateral jaws which are mounted in the forging device so as to be movable at an angle to the longitudinal axis of the forging device.

Abstract: This invention relates to a method for manufacturing a damping shaft sleeve that includes: forging a base material into a billet that includes a cylindrical body having two opposite ends and an annular flange formed on one of the opposite ends; forging a shaft hole in the cylindrical body; inverting the base material and forming two annular grooves that are respectively indented from two opposite surfaces of the annular flange; forging the billet to form the annular flange into a bottom wall and a side wall, the bottom wall cooperating with the side wall to form an asymmetrical and helical groove; and forging the shaft hole to pass through the cylindrical body of the billet.

Abstract: A compression limiter is disclosed that comprises an upper surface and a lower surface. The compression limiter further comprises an inner surface that defines a passageway configured to accommodate a fastener and an outer surface configured to engage a structure in which the compression limiter is placed. A first retainer projects outwardly from the outer surface and includes a first retention surface that has at least a planar portion. The first retainer further includes an undercut surface disposed inwardly from the first retention surface so as to create a corner extending in a direction with at least a component perpendicular to the longitudinal direction. A method of forming the compression limiter is also disclosed.

Abstract: The invention refers to a method and a press tool for manufacturing a separating disk adapted to be included in a disk package of a centrifuge rotor of a centrifugal separator. The separating disk extends around an axis of rotation and has a tapering shape with an inner surface and an outer surface along the axis of rotation. A blank of a material is provided. A central opening is made in the blank. The blank is positioned in a charging position by means of a projecting central portion. The blank is pressed against the first tool part having a shape corresponding to the tapering shape of the separating disk.

Abstract: The present invention is a method of forging a bevel gear, comprising: a first forging step in which a first intermediate article is obtained by pressing a blank, such that there is formed a preliminary one-end recessed part that is axially recessed in an axis-center part on an axially one-end side and/or a preliminary other-end recessed part that is axially recessed in an axis-center part on an axially other-end side; a second forging step in which a second intermediate article is obtained by pressing the first intermediate article in a hermetically sealed cavity space defined by a first die and a second die that is positioned opposedly to the first die in the axial direction, such that there are formed: a body part including a tooth part on a radially circumference thereof and a one-end recessed part that is axially recessed in an axis-center part on the axially one-end side; and a projecting part projecting from a rear surface part of the body part on the axially other-end side; and a through-hole forming

Abstract: A spline member manufacturing apparatus includes a shaving punch, a shaving die, a spline punch, and a stripper. The stripper supports a first surface of a base plate portion and an outer circumferential surface of a boss portion. The shaving punch is advanced relatively, while a material and the stripper are being pressed so that cutout portions are formed in an outer circumference portion of the base plate portion by the shaving punch and the shaving die. The shaving punch is further advanced relatively while the outer circumferential surface of the base plate portion is held by the shaving die, so that a spline portion is formed by inserting the spline punch along the inner circumferential surface of the boss portion.

Abstract: A method and apparatus for manufacturing a legged annular member. In one aspect, a work member is formed from a ring-like raw material, and has an annular part and an outer wall part, which is formed from a leg part and a connecting part. The connecting part is removed from the work member to form an intermediate legged annular member having an annular part and a leg part. An inner diameter of the leg part of the intermediate legged annular member is expanded while a burr is removed to form a carrier, which serves as a legged annular member. Therefore, the number of manufacturing processes until completion of the carrier can be reduced, compared to performing separate processes to expand the diameter of the leg part and remove the burr. Thus, it is possible to shorten the period of time needed for completion of the carrier.

Abstract: An apparatus for cold-forming a workpiece having a substantially round cross-section and an elongate body into a tube having a main portion with a substantially tetragonal cross-section and a reinforced end. The apparatus includes a die in which a received portion of the body of the workpiece is receivable and from which a preselected portion of the body extends, and a first punch adapted to bend the preselected portion radially outwardly to form a curled end. The apparatus also includes a second punch to form the curled end into a round reinforced end, and a die subassembly for forming the received portion of the body of the workpiece into the main portion of the tube having the substantially tetragonal cross-section and for forming the round reinforced end into the reinforced end of the tube.

Abstract: A closed forging die and a forging method with which sagging can be reduced, a constant velocity joint and a universal joint can be made compact and lightweight, removal of a shaft tip thereof by machining prior to heat treatment is not required, and material costs and machining costs can be reduced by using a closed forging die includes openable dies, and punches that move in an opening/closing direction of the dies to pressurize a material in the dies. By using the die, a product having shaft portions formed radially is manufactured. A clearance is provided to each of the formed shaft portions between a tip surface, and abutting portions are provided to the dies side abutting against at least a tip side of an outer circumferential surface of the shaft portions.

Abstract: A forging die tool set defines a cavity and includes a core rod in the cavity for shaping a void in a work piece. The core rod extends in a direction in which the work piece is introduced, compressed, and ejected from the cavity. The core rod includes an upper portion and a lower portion. The upper portion has a cross sectional shape that forms a certain shape in the work piece and a radially tapered section that tapers toward the lower portion of the core rod. The lower portion also has a cross sectional shape that forms a certain shape in the work piece, and the cross sectional shape of the upper portion differs from the cross sectional shape of the lower portion, the lower portion being a more wear resistant shape characterized by larger radii and the upper portion being a finishing shape with smaller radii for shaping the final form of the forged work piece.

Abstract: A metal forming die includes a first die half and a second die half moveable relative to the first die half. The first and second die halves define a die cavity when the second die half is in a closed position. A transducer is operable to vibrate the first die half during metal forming.

Abstract: A method for forming a component includes forming a workpiece into a hollow preform cylinder concentric with an axis and including an inner surface that extends along the axis, placing within the preform cylinder a mandrel having an outer surface, flow-forming the inner surface and the outer surface of the preform cylinder such that the inner surface of the cylinder conforms to at least a portion of the outer surface of the mandrel, and cutting the flow formed cylinder transversely with respect to the axis into segments, each segment having an axial length.

Abstract: A sprocket is formed by fine-blanking a steel plate using a die having a cutting edge shaped to produce rounded edges on the back sides of the sprocket tooth heads, and protrusions on the front sides. Thereafter the edges of the front sides of the sprocket tooth heads are formed in a press so that the protrusions are removed, and the edges of the front sides of the sprocket tooth heads have a rounded cross-sectional shape substantially the same as that of the edges of the front sides.

Abstract: The present invention provides a metal molding method, a metal molding machine and a metal molded body, wherein using a mold in which a molding space having a predetermined shape and a metal body lead-in space which is communicated with the molding space are formed, a metal body which is inserted into the metal body lead-in space is fed into the molding space by applying a predetermined pressure thus forming a molded product having a predetermined shape. Particularly, the metal body is deformed by shearing when the metal body is fed to the molding space from the metal body lead-in space thus turning the metal structure of the metal body into the finer grain structure.

Abstract: A machine, method and tooling to precision cold-form roller blanks for anti-friction bearings. The machine is a multistage progressive former using floating die cavities to enable simultaneous shaping of the ends of the roller with high accuracy and without flash. The tools and staged forming create an improved roller with an advantageous grain pattern and devoid of structural defects previously attributable to the presence of sheared end face material in the radiused corners of the blank and flash at its mid-section.

Abstract: A high-pressure piping part includes a body structure forged in a closed space. The body structure is formed to include a main body portion formed by forward extrusion and side arm portions formed by side extrusion. The main body portion has therein a fiber flow formed along a passage, and the side arm portion has therein a fiber flow formed along the passage. Therefore, the direction in which stress is applied to the passage of the body structure by an internal pressure is approximately perpendicular to the directions of the fiber flows, thereby improving the degree of allowance of the resistance to pressure of the body structure for an injector.

Abstract: A method of manufacturing a member having a toothed portion, comprises a first step of cutting a work piece into predetermined dimensions and then deburring the same, and a second step, in succession with the first step, of pressing an axially end face of a portion to be toothed with a predetermined load, and simultaneously drawing the work piece so as to form the toothed portion.

Abstract: A cold forging apparatus for forming complex shapes at a single station includes a plurality of multiple function punch assemblies disposed on intersecting axes. Each of the multiple function punch assemblies includes an inner or a center punch and an outer or ring-shaped punch surrounding and in sliding contact with the inner punch. The apparatus also includes a die holder for positioning a mass or slug of metal between the punches. A computer system controls movement of the punches and is programmable to form parts of different shapes at a single station. Off axis punches and angularly offset punches and an additional punch or punch assembly are also disclosed.

Abstract: An annular excess portion is disposed, a spline forming male mold is passed through a boss of a sheet metal-made rotary member in which a root portion of the boss and a peripheral portion are previously displaced, and the boss is set to a stationary mold with being fitted into a boss fitting hole of a rotary member holding mold. Thereafter, the annular excess portion is clamped between a pressing mold and the stationary mold to be deformed into a flat shape, and the root portion of the boss is squeezed into spline forming grooves to be plastically deformed, thereby forming a boss spline. According to the configuration, increase in thickness os a sheet metal blank is avoided, the strength of the boss is ensured, and weight reduction is achieved. The production efficiency can be remarkably improved, and cutting chips are eliminated, so that adverse influence on the working environment can be avoided.

Abstract: A die for forming a work-piece having a complex geometry includes a die insert having an interior surface that defines a first portion of the complex geometry and a retainer ring that selectively engages the die insert. The retainer ring includes a circumferential interior surface that defines a second portion of the complex geometry. A punch insert that is slidably disposed in the retainer ring and includes a surface that defines a third portion of the complex geometry.

Abstract: A connecting rod is formed by cold forging in a single pressing cycle at a good accuracy without separately preparing a large-end cap, to thereby reduce the manufacturing cost. A double-action type of forging apparatus is made up of an upper die, a lower die, and a large-end portion punch and a small-end portion punch, both being movably provided in each of the dies. The upper die is closed to the lower die while forging a preform, to thereby roughly form a connecting rod. Then, the large-end portion punch and the small-end portion punch are protruded into a forming space between both the upper and lower dies to forge the parts to be pierced, thereby filling underfilled parts with material. Then, the large-end portion punch and the small-end portion punch on the side of the upper die are pushed out of the forming space to reach the lower die. The underfills left in the parts to be pierced are blanked or punched away to form a large-end hole and a small-end hole.

Abstract: A method and apparatus for the formation of an enlarged end portion of a bar (48) by upset forging. Before upsetting, the bar end portion (46) is heated to a forging temperature and passed through a passage (40) of a form part (2,4) and into a cavity (44) with increased cross-sectional area which is defined by the form part (2,4). The portion of the cavity (44) which is located opposite the passage (40) is defined by wall (42) with a shape corresponding to the cavity's (44) cross section. For the formation of the enlarged end portion, the wall (42) is pressed against the end of the bar and upsets the bar end portion until the bar material fills the cavity (44). According to the method a bar portion which is located in the passage (40) is also heated to forging temperature, and the form part (2,4) is moved simultaneously with the wall (42), whereby this bar portion (48) is successively fed into the cavity (44) during the upsetting process.