To suppress springback of the press-formed product, in improving rigidity of a press-formed product having a low rigidity shape produced by press-forming a sheet material by a rigidity adding shape to suppress springback at a time when the press-formed product is removed from a die, the rigidity adding shape is arranged to extend in a direction of crossing a displacement contour indicating a state of springback in an initial shape prior to an arrangement of the rigidity adding shape of the press-formed product.

To suppress springback of the press-formed product, in improving rigidity of a press-formed product having a low rigidity shape produced by press-forming a sheet material by a rigidity adding shape to suppress springback at a time when the press-formed product is removed from a die, the rigidity adding shape is arranged to extend in a direction of crossing a displacement contour indicating a state of springback in an initial shape prior to an arrangement of the rigidity adding shape of the press-formed product.

The disclosure relates to a method for producing a overlapping connection, in which at least two overlapping components are connected to one another via a folded flange, with a first edge of a first component being folded over a second edge of a second component to form the folded flange, along with a body component that includes such an overlapping connection for a vehicle and a stamping tool for such a body component. According to the disclosure at least one connection region is formed on the folded flange, in which the stamping tool stamps the first component through the second component at least one stamping point, with displaced material of the first component passing into the second component and producing a positive connection.

A material includes a sheet of metal having a first face and an opposed second face, and a metal grain direction. The first face is textured with a first set of texturing features. Each texturing feature of the first set includes, respectively, a groove cut into the first face and extending along a groove axis, and a barb extending from the groove and away from the first face. The texturing features of the first set are arranged in a plurality of rows, and the groove axes of the texturing features in a given row extend generally parallel to the given row. The rows are generally non-perpendicular to the grain direction.

A convex portion projecting from a plate member includes a base, a convex body, and a guide. The base is part of the plate member. The convex body erects in a cylindrical shape from the base. The guide is at a top end of the convex body. The base includes a first inner circumferential surface, a second inner circumferential surface, and a third inner circumferential surface. The first inner circumferential surface is continuous with an inner circumferential surface of the convex body and extends in a direction opposite to an erecting direction of the convex body. The second inner circumferential surface is continuous with the first inner circumferential surface and intersects the erecting direction of the convex body. The third inner circumferential surface is continuous with the second inner circumferential surface and is larger in diameter than the first inner circumferential surface.

A metal member manufacturing method according to one form of this disclosure is a method of manufacturing a metal member that is thinner at some portions than at other portions. The method includes a formation step of pressing one surface of surfaces of a metal workpiece that are perpendicular to a thickness direction with a press-working die so as to form a raised portion in the other surface, and a cutting step of moving a cutting blade along the other surface to cut off the raised portion by shaving. In the formation step, the raised portion is formed such that the area of a cross-section of the raised portion that is parallel to a moving direction of the cutting blade and perpendicular to the other surface decreases toward an end of the raised portion on a rear side in the moving direction of the cutting blade.

A metal member manufacturing method according to one form of this disclosure is a method of manufacturing a metal member that is thinner at some portions than at other portions. The method includes: a formation step of pressing one surface of surfaces of a metal workpiece that are perpendicular to a thickness direction with a press-working die so as to form raised portions in the other surface; an application step of applying a lubricant; and a cutting step of moving a cutting blade along the other surface to cut off the raised portions by shaving. In the formation step, a sump in which the lubricant is held is formed between the raised portions in the other surface or at a position on a rear side of the raised portions in a moving direction of the cutting blade, and in the application step, the lubricant is applied to the sump.

An electromagnetic stamping apparatus includes a work platform configured to load a work piece. A stamping component is coupled to the work platform and has a first position and a second position. The stamping component includes a stamping rod and a stamping head. The stamping head stamps the work piece on the first position. An electromagnetic device is coupled to the stamping rod and generates a magnetic force according to an alternating current to push the stamping component to the first position to make the stamping component stamp the work piece. A compression spring pushes the stamping component to the second position according to the restoring force of the compression spring. Wherein, the magnetic force is greater than the restoring force of the compression spring to make the stamping component stamp the work piece twice in every waveform period of the alternating current.

A 3-dimensional (3D) pattern puncher for punching a lithium metal electrode to provide one or more unit electrodes is provided. The 3D pattern puncher includes a mold punch configured to move up and down, the mold punch corresponding to a size of the unit electrode; a die corresponding to the mold punch; a mold blade disposed at an edge of the mold punch and configured to punch the lithium metal electrode to provide the one or more unit electrodes; and a 3D pattern positioned at an inner portion of the mold punch where the mold blade is not disposed.

A 3-dimensional (3D) pattern puncher for punching a lithium metal electrode to provide one or more unit electrodes is provided. The 3D pattern puncher includes a mold punch configured to move up and down, the mold punch corresponding to a size of the unit electrode; a die corresponding to the mold punch; a mold blade disposed at an edge of the mold punch and configured to punch the lithium metal electrode to provide the one or more unit electrodes; and a 3D pattern positioned at an inner portion of the mold punch where the mold blade is not disposed.