The present disclosure includes calculating coordinates of a midpoint of one of a plurality of first tool teaching points and the subsequent first tool teaching point, and calculating coordinates of a midpoint of one of a plurality of second tool teaching points that corresponds to the one first tool teaching point and the subsequent second tool teaching point, calculating an inter-midpoint distance between the midpoint of the first tool teaching points and the midpoint of the corresponding second tool teaching points, determining whether the inter-midpoint distance is within a given tolerance range, and reporting, when the inter-midpoint distance is out of the given tolerance range, the corresponding first tool teaching points and second tool teaching points as poor.

A press forming analysis method predicts an influence of a shape variation of a blank taken from a metal sheet having the shape variation when press forming is performed by using the blank and includes: acquiring a shape of a press formed part after die release as a first shape by performing press forming analysis when press forming is performed with a predetermined tool-of-press-forming model by using a flat blank model; generating a shape variation blank model corresponding to the shape variation; acquiring a shape of a press formed part after die release as a second shape by performing press forming analysis when press forming is performed with the predetermined tool-of-press-forming model by using the shape variation blank model; and acquiring a portion where both of the first and second shapes deviate from each other and a deviation amount by comparing the first and second shapes.

A press forming analysis method predicts an influence of a shape variation of a blank taken from a metal sheet having the shape variation when press forming is performed by using the blank and includes: acquiring a shape of a press formed part after die release as a first shape by performing press forming analysis when press forming is performed with a predetermined tool-of-press-forming model by using a flat blank model; generating a shape variation blank model corresponding to the shape variation; acquiring a shape of a press formed part after die release as a second shape by performing press forming analysis when press forming is performed with the predetermined tool-of-press-forming model by using the shape variation blank model; and acquiring a portion where both of the first and second shapes deviate from each other and a deviation amount by comparing the first and second shapes.

Warpage or torsion in a longitudinal direction is suppressed when an elongated curved component is manufactured by press forming. A method for manufacturing a pressed component includes a first step of press forming a metal sheet in a desired component shape using a first die, and a second step of press forming a formed product using a second die after the first step. In the second step, a cross section of a bent part and a vertical wall part are controlled to be opened depending on warpage at longitudinal end portions of the component by elastic recovery due to release from the first die, thereby suppressing the warpage.

Warpage or torsion in a longitudinal direction is suppressed when an elongated curved component is manufactured by press forming. A method for manufacturing a pressed component includes a first step of press forming a metal sheet in a desired component shape using a first die, and a second step of press forming a formed product using a second die after the first step. In the second step, a cross section of a bent part and a vertical wall part are controlled to be opened depending on warpage at longitudinal end portions of the component by elastic recovery due to release from the first die, thereby suppressing the warpage.

While a compression part (B1) in a bottom wall part of a cup-shaped workpiece (B) is compressed by an inner punch (11) and an inner die (14) and moved in a direction to get away from an intermediate die (15), the inner die (14) is pushed toward the inner punch (11); and a compression part (B2) being an outer end portion in a radial direction of the workpiece (B) is compressed by an outer punch (13) and an outer die (16) and moved in an direction to approach the intermediate die (15), to thereby suppress the workpiece (B) in the compression part (B2) from material-flowing in a direction to get away from a central axis (10), whereby thickness reduction processing of the compression part (B1) and thickness increase processing of a vertical wall part (B3) of the workpiece (B) sandwiched by an intermediate punch (12) and the inner die (15) and a vertical wall part (B4) of the workpiece (B) sandwiched by the intermediate punch (12) and an outer die (16) are performed.

While a compression part (B1) in a bottom wall part of a cup-shaped workpiece (B) is compressed by an inner punch (11) and an inner die (14) and moved in a direction to get away from an intermediate die (15), the inner die (14) is pushed toward the inner punch (11); and a compression part (B2) being an outer end portion in a radial direction of the workpiece (B) is compressed by an outer punch (13) and an outer die (16) and moved in an direction to approach the intermediate die (15), to thereby suppress the workpiece (B) in the compression part (B2) from material-flowing in a direction to get away from a central axis (10), whereby thickness reduction processing of the compression part (B1) and thickness increase processing of a vertical wall part (B3) of the workpiece (B) sandwiched by an intermediate punch (12) and the inner die (15) and a vertical wall part (B4) of the workpiece (B) sandwiched by the intermediate punch (12) and an outer die (16) are performed.

An apparatus and method of forming a metallic cup that is subsequently reformed into a container body is provided. More specifically, the present invention relates to an apparatus and methods used to form a metallic cup with a reformed bottom having an inwardly oriented projection. The inwardly oriented projection reduces a height of the metallic cup but utilizes the same amount of metallic stock material as a taller cup with substantially the same diameter that does not have an inward projection. The inwardly oriented projection thus allows the use of a conventional bodymaker and other can manufacturing tools to convert the cup into a container body of a preferred size and shape.

A can end for a two-piece beverage container has a curl positioned about a longitudinal axis which defines an outer perimeter of the can end. A circumferential wall angles downwardly and radially inwardly relative to a radially inner portion of the curl. A strengthening member extends radially inwardly relative to the circumferential wall. A center panel extends radially outwardly from the longitudinal axis towards the strengthening member and has a diameter greater than 87.7% of an overall diameter of the can end. A frangible score and a hinge portion define an openable tear panel in the center panel. A stay-on tab is attached to the center panel and has a nose portion overlying the tear panel opposite a lift end of the tab.

A domer station having a domer assembly, a housing assembly, and a stacked piston assembly is provided. The domer assembly is movably disposed within a domer body passage located in the housing assembly and structured to move between a forward, first position and a retracted, second position. The stacked piston assembly includes a plurality of pistons, preferably three pistons, disposed in series and a pressure supply. The pistons are disposed behind the domer in pressure chambers. The pistons have a constant pressure applied thereto and are biased towards the domer. The pistons are, however, each restrained by a stop and do not contact, or operatively engage, the domer when the domer is in the domer first position.