The manufacturing method includes a first step in which a pad holding state is established and a second step in which pad draw forming is performed after the first step is completed. In the pad holding state, (a) a part of a blank 15 to be formed into a top plate 21 is held between a pad 13 and a punch 11, and a part of the blank 15 to be formed into a flange 25 is held between a die 14 and a blank holder 12, (b) in a specific press directional cross section of a part of the blank 15 to be formed into a first part, the position of the contacting surface of the blank holder 12 that makes contact with the blank 15 in the direction of pressing is located toward the punch 11 in the direction of arrangement of the pad 13 and the punch 11, compared with the position of the contacting surface of the pad 13 that makes contact with the blank 15 in the direction of pressing, (c) a vertically-reversing cross-sectional angle is more than 0 and equal to or less than 80, and (d) in a press directional cross section that is different from the specific press directional cross section, the position of the contacting surface of the pad 13 that makes contact with the blank 15 in the direction of the pressing is located toward the pad 13 in the direction of the arrangement, compared with the position of the contacting surface of the blank holder 12 that makes contact with the blank 15 in the direction of pressing.

An automatic machining device for shaft body includes a blank cutting mechanism and an automatic blank feed mechanism arranged at one side of the blank cutting mechanism, wherein, a machining platform is arranged at one side of the automatic blank feed mechanism, and a numerical control machine tool is arranged above the machining platform, thus realizing automatic cutting, feeding and machining of blanks.

An automatic machining device for shaft body includes a blank cutting mechanism and an automatic blank feed mechanism arranged at one side of the blank cutting mechanism, wherein, a machining platform is arranged at one side of the automatic blank feed mechanism, and a numerical control machine tool is arranged above the machining platform, thus realizing automatic cutting, feeding and machining of blanks.

The present invention relates to a method for producing a vehicle wheel consisting of sheet metal.

A method of forming a hot stamped, die quenched, and die trimmed part is provided. The method includes hot stamping and die quenching a blank with a quench die and forming a die quenched panel. The quench die includes at least one slow-cooling channel. The die quenched panel is die trimmed along the at least one localized soft zone that is adjacent a hard zone. The blank may be formed from a press hardenable steel (PHS), and the at least one soft zone may have a ferritic microstructure and the at least one hard zone may have a martensitic microstructure. The at least one localized soft zone may have a microhardness between about 200 HV and about 250 HV and the hard zone may have a microhardness between about 400 HV and about 500 HV.

A method for producing a component from a blank made of a medium manganese steel having 4 to 12 wt. % Mn and a TRIP effect at room temperature, in which method the blank is mechanically cut to make a prepared blank having the desired dimensions, cut edges are produced on the prepared blank by means of mechanical cutting, and the prepared blank with the cut edges is cold-formed to obtain the component at room temperature or at a temperature above room temperature but below 60 C. The method is distinguished by cost-effective production, improved formability with reduced cracking at the formed cut edges, while simultaneously reducing the forming forces. The mechanical cutting is performed at a pre-heating temperature in the range of 60 C. to less than 250 C.

Provided is a steel sheet for a hot press formed member having excellent resistance to hydrogen delayed fracture, and a method for manufacturing the same. A steel sheet for a hot press formed member comprises: a base steel sheet; an aluminum alloy plating layer on a surface of the base steel sheet; and an oxide layer which is formed on a surface of the plating layer and has a thickness of 0.05 ?m or more.

Disclosed are a stamping method and a deep-drawing die for an aluminum alloy liner of a large-volume hydrogen storage cylinder, which solve that technical problem of low production efficiency of processing the aluminum alloy liner of the large-volume hydrogen storage cylinder by adopting strong spin and thinning of an aluminum tube in the prior art. The stamping method includes heating and stamping an aluminum ingot into a cup-shaped rough blank, then cold deep drawing the cup-shaped rough blank for thinning and lengthening into an aluminium alloy liner, and the deep-drawing die includes terrace die and thinning dies.

The present disclosure provides a hot-press formed part comprising a plated steel sheet and an aluminum alloy plated layer formed on the plated steel sheet, wherein the aluminum alloy plated layer comprises: an alloying layer (I) formed on the plated steel sheet and containing, by weight %, 5-30% of Al; an alloying layer (II) formed on the alloying layer (I) and containing, by weight %, 30 to 60% of Al; an alloying layer (III) formed on the alloying layer (II) and containing, by weight %, 20-50% of Al and 5-20% of Si; and an alloying layer (IV) formed continuously or discontinuously on at least a part of the surface of the alloying layer (III), and containing 30-60% of Al, wherein the rate of the alloying layer (III) exposed on the outermost surface of the aluminum alloy plated layer is 10% or more.

To provide a steel sheet for hot stamping suitable for manufacturing, through hot-stamping working, a component having portions with different strengths, and a hot-stamped member having portions with different strengths. A steel sheet for hot stamping according to the present invention includes, on a surface of the steel sheet: a site having a surface-treated film whose emissivity at a wavelength of 8.0 m at 25 C. is 60% or more; and a site at which the surface-treated film is not provided, in which the surface-treated film contains carbon black, and one or more of oxides selected from a group consisting of a Zr oxide, a Zn oxide, and a Ti oxide, in which the carbon black and the oxides exist while being dispersed over the entire surface-treated film, the surface-treated film has a silica content of 0 to 0.3 g/m.sup.2, and when an adhesion amount of the carbon black and an adhesion amount of the oxides are set to X.sub.CB (g/m.sup.2) and X.sub.Oxide (g/m.sup.2), respectively, an equation (1) below is satisfied.