Mitsui High-tec Incorporated

Fujitsu General Limited

Norio Tosu

Tomonori Kojima

Hisao Igarashi

Junichi Irie

Hideki Matsuo

Tatsumi Tomozoe

Hitoshi Kurita

A die assembly having a guide rod that includes a lower rod which is fixedly placed on a stripper plate which guides a punch for engagement with a lower die and an upper rod which is placed removably on the stripper plate for engagement with an upper die. When punching a material for punching, the upper rod is removed from the stripper plate so as to put the upper plate and the stripper plate in a disconnected state, i.e., so that the stripper plate is made free to move backwards and forwards relative to the lower die by the lower rod. When the material for punching is not punched, the upper rod is attached to the stripper plate so as to put the upper die and the stripper plate in a connected state by the upper rod, so that the stripper plate is held on to the upper die.

Die assembly

A method of producing a laminated variant-shaped core, includes punching out core sheets-from a stripto form the outlines of the core sheets-, and push back the punched out core sheets-into the strip; forming cutoutsandreaching outer peripheries of outer platesand, the outer platesandbeing the same in outer shape and respectively containing thereinside the core sheets-, the cutoutsandhaving inner edges respectively in contact with the core sheets-; forming caulking portionsin each of the core sheets-and caulking portionsin each of the outer platesand; punching out the outer platesandfrom the stripto form the outlines of the outer platesand, and laminating and interlocking the core sheets-to form the variant-shaped laminated coreand laminating and interlocking the outer platesand; and removing the outer platesandlocated outside the laminated and interlocked variant-shaped core

Method of producing variant-shaped laminated core

There is provided a method for manufacturing a stator core for an axial air-gap electronic motor, in which core sheets are laminatedly fixed while being shifted with predetermined intervals. The method includes a step in which first side surfaces in the circumferential direction (first slot surfaces) of the first to nth (n is a positive integer) core sheets are blanked out of a mother sheetby moving first blanking puncheswith predetermined intervals via a first control means; and a second blanking step in which second side surfaces in the circumferential direction (second slot surfaces) of the first to nth (n is a positive integer) core sheets are blanked in succession by moving a second blanking punchwith predetermined intervals via a second control means

Method for manufacturing a stator core for an axial air-gap electronic motor

A laminated core formed by reliably and firmly connecting laminated core segments () in an annular form by first and second joining sections () thereof, the first and second joining sections () formed by alternately laminating sets of core segment sheets () and sets of core segment sheets (), each set consisting of a predetermined number of sheets, the core segment sheets having brimmed concavities () and brimmed convexities () located at both ends of yoke-segment pieces (), wherein each laminated core segment () has round corners formed at both sides of a magnetic pole shaft section () and radially outward sides of a magnetic pole tooth section () at lower and upper laminated portions of the laminated core segment (), thereby preventing damage to wires wound around the magnetic pole shaft section ().

Growing community of inventors

Kitakyushu, Japan

Norio Tosu