The invention refers to a method and an apparatus (20) for manufacturing of a prismatic unilaterally open battery cell container (21). First an extruded container (41) is formed from a slug (38) by extrusion. The slug (38) consists of a uniform material. The extruded container (41) is then formed by a first ironing in a first ironing station (25) and by a second ironing in a second ironing station (28). During ironing the container is moved by a respective ironing ram (26, 29) only partly through an associated die tool (27, 30) and is reversed when reaching a reversal point (U). After the second ironing a remaining edge (82) of the obtained intermediate container (77) is separated, thereby the battery cell container (21) is obtained.

A method for producing a metal cylinder includes preparing a metal slug having a surface adjusted so that the crystal grain diameter at a depth of 10 m from the surface is smaller than that at a depth of 100 m from the surface, and the crystal grain diameter at a depth of 10 m from the surface is 30 m or more and 120 m or less; and forming a cylinder by impact pressing of the metal slug having the surface as a bottom.

A method for producing a metal cylinder includes preparing a metal slug having a surface adjusted so that the crystal grain diameter at a depth of 10 m from the surface is smaller than that at a depth of 100 m from the surface, and the crystal grain diameter at a depth of 10 m from the surface is 30 m or more and 120 m or less; and forming a cylinder by impact pressing of the metal slug having the surface as a bottom.

The invention refers to a method and an apparatus (20) for manufacturing of a prismatic unilaterally open battery cell container (21). First an extruded container (41) is formed from a slug (38) by extrusion. The slug (38) consists of a uniform material. The extruded container (41) is then formed by a first ironing in a first ironing station (25) and by a second ironing in a second ironing station (28). During ironing the container is moved by a respective ironing ram (26, 29) only partly through an associated die tool (27, 30) and is reversed when reaching a reversal point (U). After the second ironing a remaining edge (82) of the obtained intermediate container (77) is separated, thereby the battery cell container (21) is obtained.

A method for producing a metal cylinder includes preparing a metal slug having a surface adjusted so that the crystal grain diameter at a depth of 10 m from the surface is smaller than that at a depth of 100 m from the surface, and the crystal grain diameter at a depth of 10 m from the surface is 30 m or more and 120 m or less; and forming a cylinder by impact pressing of the metal slug having the surface as a bottom.

A method for producing a metal cylinder includes preparing a metal slug having a surface adjusted so that the crystal grain diameter at a depth of 10 m from the surface is smaller than that at a depth of 100 m from the surface, and the crystal grain diameter at a depth of 10 m from the surface is 30 m or more and 120 m or less; and forming a cylinder by impact pressing of the metal slug having the surface as a bottom.

A method of preparing a cylindrical metal member includes preparing a metallic ingot having at least one surface having a mean width with respect to roughness Sm in a range of from 100 m to 220 m; imparting a lubricant to the at least one surface of the metallic ingot; and subjecting the metallic ingot to impact pressing while the surface coated with the lubricant with respect to the metallic ingot is set as a bottom surface, to thereby mold a cylindrical metal member.

A method of preparing a cylindrical metal member includes preparing a metallic ingot having at least one surface having a mean width with respect to roughness Sm in a range of from 100 m to 220 m; imparting a lubricant to the at least one surface of the metallic ingot; and subjecting the metallic ingot to impact pressing while the surface coated with the lubricant with respect to the metallic ingot is set as a bottom surface, to thereby mold a cylindrical metal member.

A method and a former for necking and thickening a tube end. The former includes a hydraulic cylinder, a pusher, a concave die, a filler block, a plurality of heating rods and a heating device. The hydraulic cylinder is connected to a disc provided with a guide sleeve. The pusher is provided on the hydraulic cylinder and passes through the guide sleeve. The concave die is provided at a side of the pusher and includes a mold cavity and a plurality of heating holes. The filler block is provided in the mold cavity. The heating rods are provided in the heating holes connected to the heating device. The filler block includes a tapered portion provided at one end of the filler block and a diameter-reduced portion. The tapered portion is threadedly connected to the diameter-reduced portion. An ejector pin is provided at one end of the diameter-reduced portion.

A method and a former for necking and thickening a tube end. The former includes a hydraulic cylinder, a pusher, a concave die, a filler block, a plurality of heating rods and a heating device. The hydraulic cylinder is connected to a disc provided with a guide sleeve. The pusher is provided on the hydraulic cylinder and passes through the guide sleeve. The concave die is provided at a side of the pusher and includes a mold cavity and a plurality of heating holes. The filler block is provided in the mold cavity. The heating rods are provided in the heating holes connected to the heating device. The filler block includes a tapered portion provided at one end of the filler block and a diameter-reduced portion. The tapered portion is threadedly connected to the diameter-reduced portion. An ejector pin is provided at one end of the diameter-reduced portion.