A metal lath having an integral hem structure includes a main body. The main body is formed by enclosing the metal lath so that the main body has a ring-shaped side wall. The side wall defines an accommodating space therein. Two ends of the main body are formed with openings to communicate with the accommodating space, respectively. One of the openings is integrally formed with a hem around an end edge of the opening by bending. The hem is integrally formed with the metal lath, which can reduce production time and cost effectively and can prevent the user from being cut by the metal lath.

A thermal-assisted method deforms a sheet metal assembly having constrained ends. A focus bending area located between the constrained ends is heated. The focus bending area is bent while the sheet metal assembly is within an elevated bending temperature range. A sheet metal assembly may be formed by this method, which includes an outer metal sheet and an inner metal sheet fixed together to form constrained ends. The sheet metal assembly has a bend formed therein between the first and second constrained ends, wherein each metal sheet is bent at the bend with a maximum gap between the inner and outer metal sheets at the bend. The maximum gap is no greater than five times the thickness of one of the inner and outer metal sheets, and the bend has a radius less than three times the thickness of one of the inner and outer sheets.

A pouch forming method and a pouch forming device are provided. In particular, the pouch forming method for forming an accommodation part that accommodates an electrode assembly in a pouch sheet includes a seating process of seating the pouch sheet on a top surface of a lower die in which a forming groove is formed in an upper portion thereof. In a vacuum elongation process, a lower portion of the pouch sheet, in which the accommodation part is formed, is elongated by vacuum, and in an accommodation part formation process, the portion of the pouch sheet, which is elongated by the vacuum, is pressed by a punch disposed above the pouch sheet in a direction in which the forming groove is formed to form the accommodation part.

An electromagnetic forming device for an aluminum tube member, the electromagnetic forming device including: a jig plate in which a support member that has a through hole has been fixed to a substrate; and a tube insertion mechanism that inserts a tube member into the through hole in the support member. The electromagnetic forming device also includes: a coil unit that has an electromagnetic-forming coil part; a coil movement mechanism that supports the coil unit; a current supply part that supplies current for electromagnetic forming to the electromagnetic-forming coil part; and a jig plate transport mechanism that transports the jig plate from a tube insertion stage ST1 to a tube expansion stage ST2.

Disclosed is a hot-pressed member that can exhibit very high tensile strength after hot pressing as high as TS: 1780 MPa or more, and excellent resistance to resistance welding cracking by properly adjusting its chemical composition and its microstructure such that a prior austenite average grain size is 7.5 m or less, a volume fraction of martensite is 95% or more, and at least 10 Nb-based and Ti-based precipitates having a grain size of less than 0.10 m are present on average per 100 m.sup.2 of a cross section parallel to a thickness direction of the member within a range of 100 m or less in the thickness direction from the surface of the member, and such that a B concentration in prior austenite grain boundaries is at least 3.0 times a B concentration at a position 5 nm away from the grain boundaries.

A tubular product includes a tubular body made of steel and having a tube wall which includes an opening. The opening is produced by a high-speed stamping process at a stamping speed of more than 4 m/s. The opening is situated in the tube wall in a region thereof which has a tensile strength Rm>800 MPa.

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.

Provided is a steel sheet for a hot press formed member having excellent painting adhesion and post-painting corrosion resistance, and a method for manufacturing the same. A steel sheet for hot press forming according to one aspect of the present invention comprises a base steel sheet and a plated layer formed on a surface of the base steel sheet, wherein the ratio of an area occupied by pores to the entire area of a surface layer portion may be 10% or more in a cross section of the surface layer portion observed when the plated layer is cut in a thickness direction thereof.

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.

A first method is disclosed for forming a tubular reinforcement that comprises the steps of: providing a 7xxx aluminum tube, heating tube to at least 450 C. and water quenching the tube in less than or equal to 20 seconds after heating. All of the forming processes on the tube are then completed from within 1 to 8 hours of quenching. A second method for forming a tubular reinforcement is disclosed that comprises the steps of providing a 7xxx-O temper aluminum tube and forming the tube into a predetermined shape. The tube in then heated the tube to at least 450 C. and quenched the tube with water or air in a hydroforming die just prior to or while hydroforming the tube.