A material member blanked from metal sheet is subjected to upsetting to form an annular peripheral portion that is thinner than the center part of the material inside the annular portion, and the thicker inside portion is formed into a concavity. The first intermediate product thus formed is drawn to form a cup-shaped case with an internal boss and/or an external boss, and an outside flange. The intermediate product can also be used to make gears and the like.

There is provided an integral structural member comprising a plate and a tubular body, in which the rigidity of connection between the two is high, and the firm connection is achieved. Further, there is provided a production method of producing it easily.

Part of a cylindrical wall 3 of the tubular body 2 is defined by superposed walls 6 held in intimate contact with each other, and that the outermost one 5 of the superposed walls 6 is folded back to be integrally continuous with the plate 1.

A thin, forged magnesium alloy casing is integrally constituted by a thin plate with projections on either or both surfaces, and the thin plate is as thin as about 1.5 mm or less. The thin forged casing can be produced by (a) roughly forging a magnesium alloy plate to form an intermediate forged product under the conditions of a preheating temperature of the magnesium alloy plate of 350 to 500 °C, a die temperature of 350 to 450 °C, a compression pressure of 3 to 30 kbar, a compressing speed of 10 to 500 mm/s and a compression ratio of 75 % or less; and (b) precisely forging the intermediate forged product under the conditions of a preheating temperature of the intermediate forged product of 300 to 500 °C, a die temperature of 300 to 400 °C, a compression pressure of 1 to 20 kbar, a compressing speed of 1 to 200 mm/s, and a compression ratio of 30% or less.

The object of the present invention is to disclose a method of forming integrally an axis on a metallic plate at an arbitrary position thereof and perpendicularly to the surface thereof.

The method comprises a first step of forward squeezing performed by a pressing process applied to a metallic plate 1 and a second step of extending the length of a projection formed in the first step by rear-squeezing performed by pushing a punch into the projection, thereby producing an axis with a sufficient height and high precision.

Improvements in and to aluminium discs for the manufacture of metal containers by impact extrusion, which improvements are achieved by increasing the free surface of the faces of the discs, without varying their diameter, by means of a relief formed thereon, which is obtained by engraving or embossing the plane surfaces of an aluminium band, the said band being then subjected to a cutting operation for obtaining the said discs.

The present invention relates to a torsional extreme-plastic processing method capable of replacing a metal spinning process that is a method for processing a conic metal pipe which is mainly used for a projectile such as a bullet, missile, and a nose cone of an airplane. In other words, a processing method in which severe plastic deformation based on torsion and compressive force is applied to a material by using a mold to produce miniaturize and nano-size crystal particles in a conic pipe. According to the severe plastic deformation method of the present invention, a punch that matches an inner shape of the conic metal pipe is mounted inside the conic metal pipe, and then a mold that matches an outer shape of the conic metal pipe is mounted outside the conic metal pipe. Thus, microstructures of the conic metal pipe may be ultra-finely crystallized or nano-crystallized through shearing by applying compression and torsion to the conic metal pipe.

A zoning closed-die extruding device may be provided. The device may comprise a closed female die (6) and a male die (9), The male die (9) is disposed in a longitudinal direction and configured to be mated with a closed cavity (61) of the closed female die (6) to extrude a blank. The male die (9) comprises an extruding shaft portion (92) and a stamp-extruding head portion (93) which is connected with the extruding shaft portion (92) and disposed below the extruding shaft portion (92). A cross-sectional area of the stamp-extruding head portion (93) perpendicular to a longitudinal axis of the closed female die (6) is smaller than that of the extruding shaft portion (92) perpendicular to the longitudinal axis of the closed female die (6). The male die (9) is configured to rotate about the longitudinal axis of the closed female die (6) so that the blank is sequentially and zonally deformed by the stamp-extruding head portion (93) inside the closed cavity (61) of the closed female die (6). A zoning closed-die extruding method is also provided. According to the present disclosure, the formed vessel has an even wall thickness, a high reliability and a high strength, and cracks and defects of the vessel may be thoroughly closed and repaired.

Die Erfindung betrifft ein neuartiges Verfahren zur Herstellung eines Gehäuserings aus einem zu einem Bund aufgewickelten Draht durch ausschließliches Kaltumformen mit den folgenden Schritten

- Abtrennen eine Rohlings (1) vom Drahtbund durch Scheren,

- Planstauchen der Rohlingstirnflächen (3, 4) durch Setzen,

- kombiniertes Napf-Fließpressen,

- Lochen,

- Hohlrückwärtspressen,

- Ausbilden einer umlaufenden Ringnut (12) durch Stauchen und

- Anreduzieren der Walzkanten.