A method of manufacturing a washer capable of improving a material yield is provided. The method includes: a preparation step of preparing a longitudinal member which includes an upper crest portion and a lower crest portion formed on at least one of an upper surface and a lower surface of the longitudinal member, and an upper valley portion and a lower valley portion continuous to the upper crest portion and the rower crest portion in the right-left direction, respectively, the upper valley portion and the lower valley portion provided with projections, respectively; and a deformation step of deforming the longitudinal member such that the upper surface and the lower surface are arcuate as viewed in the direction from the front to the rear.

A method of manufacturing a washer capable of improving a material yield is provided. The method includes: a preparation step of preparing a longitudinal member which includes an upper crest portion and a lower crest portion formed on at least one of an upper surface and a lower surface of the longitudinal member, and an upper valley portion and a lower valley portion continuous to the upper crest portion and the rower crest portion in the right-left direction, respectively, the upper valley portion and the lower valley portion provided with projections, respectively; and a deformation step of deforming the longitudinal member such that the upper surface and the lower surface are arcuate as viewed in the direction from the front to the rear.

To prevent an adhesive agent from adhering to a die set for outer shape punching and avoid contamination of the die set by the adhesive agent even if the adhesive agent protrudes from the outer shape contour of a laminated iron core, a laminated iron core manufacturing device includes: a first punch (32) and a first die (48) for punching a part of an outer shape of each iron core lamina in a sheet steel strip; an adhesive agent applying apparatus (60) configured to apply an adhesive agent on an adhesive agent application region including a portion defined in the sheet steel strip by punching by the first punch (32) and the first die 48; and a second punch (34) and a second die (50) configured to punch the outer shape of each iron core lamina other than the part punched by the first punch (32) and the first die (48) from the sheet steel strip.

A fin manufacturing apparatus includes: a first inter-row slit device that forms, by forming in a thin metal plate having a plurality of openings a plurality of slits extending in a longitudinal direction of the thin metal plate while leaving an uncut portion between the plurality of slits, metal strips partially coupled to each other in a transverse direction; a feed roller and a feeding device that convey, in the longitudinal direction, the metal strips in which the plurality of slits is formed by the first inter-row slit device; and a stacking device that (i) forms fins by cutting the uncut portion via which the metal strips are coupled to each other, to separate the metal strips and by cutting the metal strips at regular length intervals and (ii) stacks the formed fins.

A device for manufacturing a laminated iron core includes: a punch unit configured to form protrusions, and including N number of punches as a set, the N being a natural number larger than M; and N number of auxiliary punches. The N number of auxiliary punches are configured such that L number of auxiliary punches selected from the N number of auxiliary punches performs a nullification processing on a metal sheet, the nullification processing being configured to nullify a processing with the L number of punches among the N number of punches, the L being the natural number that is obtained by subtracting the M from the N. According to the above configurations, for example, since a processing position with the plurality of punches is limited in one position, a positional accuracy of protrusions formed in punched members with the plurality of punches is improved.

A device for manufacturing a laminated iron core includes: a punch unit configured to form protrusions, and including N number of punches as a set, the N being a natural number larger than M; and N number of auxiliary punches. The N number of auxiliary punches are configured such that L number of auxiliary punches selected from the N number of auxiliary punches performs a nullification processing on a metal sheet, the nullification processing being configured to nullify a processing with the L number of punches among the N number of punches, the L being the natural number that is obtained by subtracting the M from the N. According to the above configurations, for example, since a processing position with the plurality of punches is limited in one position, a positional accuracy of protrusions formed in punched members with the plurality of punches is improved.

Provided is a shield molding blank which has an uneven structure in which an air gap 4 is formed between metal plates 2, 3 formed in overlapping wavy shapes comprising recesses and projections that are periodically continuous in two directions orthogonal to each other, the shield molding blank being cut in a desired expanded shape and having peripheral edges folded. With the shield molding blank, it is possible to mold a shield having improved shield characteristics such as a heat-shielding property and a sound-shielding property.

A fin manufacturing apparatus includes: a progressive pressing device that forms, by forming in a metal plate having thermal conductivity a plurality of openings for tube-insertion and a plurality of slits while leaving uncut portions, strips that each have openings along a longitudinal direction of the strip and are partially coupled to each other in a width direction; an inter-row cutting device that separates, by cutting the portions via which the strips are coupled to each other, the strips such that each strip has a width of the fin; a cutoff device that cuts the separated strips to a predetermined length; and a guiding device between the inter-row cutting device and an inter-row slit device that guides and supplies, to the inter-row cutting device, the strips that are partially coupled to each other in the width direction, are arranged in the width direction, and are conveyed in the longitudinal direction.

A method of manufacturing a nut integrated with a bracket forms the nut formed integrally with the bracket or a slab base nut by using a plate material supplied between a punch and a die. The slab base nut includes a base plate and a boss extending from the base plate and including female-threads. The base plate and the boss are integrated into a single piece without welding trace.

A method of manufacturing a nut integrated with a bracket forms the nut formed integrally with the bracket or a slab base nut by using a plate material supplied between a punch and a die. The slab base nut includes a base plate and a boss extending from the base plate and including female-threads. The base plate and the boss are integrated into a single piece without welding trace.