Abstract: According to one embodiment, a method for manufacturing an iron core product includes providing an iron core body which includes a magnet insertion hole in which a permanent magnet is disposed, injecting a molten resin into the magnet insertion hole of the iron core body at a first pressure, and setting a pressure applied to the molten resin to a second pressure lower than the first pressure after the molten resin is injected into the magnet insertion hole and before the molten resin is cured.

Abstract: A method of manufacturing a metal product comprise forming a base region on a surface of a metal member by repeatedly scanning along a predetermined first direction while irradiating the surface of the metal member with a base laser beam over a first set of rows. The method further comprises forming a marking by repeatedly scanning along a predetermined second direction while irradiating the surface of the metal member with a marking laser beam over a second set of rows. The second direction is different from the first direction. An identification code having a predetermined pattern comprises a combination of the base region and the marking.

Abstract: An annular core piece in which an annular core piece can be received inside a contour of an outer circumstance of the annular core piece and the number of recesses formed on the outer circumstance is small is provided. In an annular core piece including a plurality of recesses opened in an outer circumferential part, the recess includes a narrowed part and a raised part, and a transverse width of the narrowed part is made narrower than a transverse width of a different region present on a side of a bottom of the recess further beyond the narrowed part, and the raised part is formed such that a part of the bottom of the recess is raised and projected toward an opening end of the recess.

Abstract: A method of manufacturing a stacked core includes forming a first pilot hole in a strip-like metal plate by a first punch, and working a predetermined portion of the metal plate by a second punch, in a state in which a first pilot pin is inserted into the first pilot hole. A worked portion of the metal plate that is worked by the second punch is press-fitted into the metal plate, in a state in which a first pilot pin is inserted into the first pilot hole, and a second pilot hole is formed in the metal plate by a third punch, after press-fitting the worked portion into the metal plate and before performing another work on the metal plate. Additionally, the method includes forming a blanked member by blanking a region including the worked portion by a fourth punch, in a state in which a second pilot pin is inserted into the second pilot hole.

Abstract: A laminated rotor core (36) wherein permanent magnets (47) are inserted in respective magnet insertion holes (46) is disposed between and pressed by an upper die (37) and a lower die (29). The upper die (37) has resin reservoir pots (50) provided above the laminated rotor core (36) and at positions corresponding to the respective magnet insertion holes (46). Raw resin material put in the resin reservoir pots (50) is heated by the upper die (37). Subsequently, the resin material in a liquefied state is ejected from the resin reservoir pots (50) by plungers (52) that are inserted and moves vertically in the resin reservoir pots (50) and is directly filled in the magnet insertion holes (46). Consequently, the respective magnet insertion holes (46) are filled with the resin material more evenly and highly reliable products can be supplied at low cost.

Abstract: A method of manufacturing a stacked stator core comprises forming a stack that comprises an annular yoke portion, a plurality of tooth portions, and a plurality of slots. The method further comprises inserting a mold core member of the plurality of mold core members into a slot of the plurality of slots, the mold core member comprising a body portion and a closing portion connected to the body portion, the body portion extending along a longitudinal direction of the slot and spaced apart from an inner wall surface of the slot, the closing portion being positioned on a slot opening side of the slot and closing an open end portion of the slot on the slot opening side. Additionally, the method comprises forming a resin portion by charging a melted resin into a filling space between the slot and the mold core member.

Abstract: In a cross sectional plane perpendicular to a center axis line of an annular core, a connection projection and a connection recess have complementary configurations in which the connection projection and the connection recess are narrowed in width with distance from coupling surfaces, the connection projection and the connection recess respectively include a pair of friction surfaces and a pair of friction surfaces extending in a direction separate from the coupling surfaces, the friction surface of the connection projection is inclined relative to a virtual normal line perpendicular to a line connecting bottom portions of the pair of friction surfaces of the connection projection, and the friction surface of the connection recess is inclined relative to a virtual normal line perpendicular to a line connecting bottom portions of the pair of friction surfaces of the connection recess.

Abstract: This disclosure relates to a method of manufacturing a laminated core including a plurality of poles arranged side by side in a circumferential direction, each pole having three or more magnet housing holes and magnets housed in the magnet housing holes. The manufacturing method includes: a step of preparing a lamination having the magnet housing holes; a step of injecting sealing resin into a pair of magnet housing holes arranged at symmetric positions with respect to a line extending in a radial direction of the lamination, with the magnets being disposed in the pair of respective magnet housing holes; and a step of injecting sealing resin into another magnet housing hole, with the magnet being disposed in the magnet housing hole.

Abstract: An apparatus for inserting a magnet into a rotor iron core includes a magnet inserting unit configured to insert a permanent magnet into a magnet-insert hole formed along a lamination direction of a rotor iron core body in which a plurality of iron core pieces are laminated, and a guide member to be attached to the magnet inserting unit, and arranged in a space formed between the magnet inserting unit and the rotor iron core body and configured to communicate the magnet-insert hole of the rotor iron core body to a supply part for the permanent magnet formed in the magnet inserting unit.

Abstract: A method of manufacturing a stacked core includes: forming a stack by stacking a plurality of core members, each of the plurality of core members including one or more blanked members blanked by a die from a metal plate along a predetermined shape; removing one core member of the plurality of core members from the stack; supplying adhesive to the one core member removed from the stack; and stacking the one core member next to an adjacent core member of the plurality of core members so that the adhesive is placed between the one core member and the adjacent core member.

Abstract: The method includes a step of aligning and laminating enlarged iron core pieces including iron core pieces and dummy piece parts and forming a composite laminated iron core integrally including a dummy laminated part with the dummy piece parts laminated and a laminated iron core, a step of placing and positioning the composite laminated iron core on a jig and removing the dummy laminated part, and a step of mutually bonding the laminated iron core body with the dummy laminated part removed to form the laminated iron core.

Abstract: A method of manufacturing a laminated stator core includes: blanking an electrical steel sheet at 1st to Nth (N is a natural number equal to or greater than 2) positions arranged in the width direction of the electrical steel sheet to form 1st to Nth blank members, and laminating the 1st to Nth blank members to form a laminated stator core. The shape or arrangement of at least one odd-shaped part of a plurality of odd-shaped parts in the kth (k is a natural number of 1 to N) blank member differs from the shape or arrangement of at least one odd-shaped part of a plurality of odd-shaped parts in the mth (m is a natural number of 1 to N and satisfying m?k) blank member such that the shapes of given two blank members do not agree with each other.

Abstract: A blanking die apparatus includes multiple machining stations having respective cutting tools operated simultaneously to perform predetermined blanking operations on a belt-shaped workpiece fed progressively in a longitudinal direction and finally to perform a contour blanking operation on the workpiece, thereby forming core pieces used for manufacturing a laminated iron core, and an auxiliary cutting tool that forms a disposal hole by partly blanking a scrap forming area of the workpiece simultaneously with the operations of the cutting tools of the machining stations.

Abstract: A tray is provided for conveying a workpiece placed on the tray inside a heat treatment furnace. The tray includes plural kinds of positional displacement regulating parts for respectively regulating horizontal positional displacements of plural kinds of workpieces with different sizes, wherein the plural kinds of positional displacement regulating parts are arranged concentrically in a plane shape.

Abstract: A semiconductor device includes: a first switching element that is provided on a high side; a first diode element that is connected in parallel to the first switching element; a second switching element that is provide on a low side and connected in series to the first switching element; and a second diode element that is connected in parallel to the second switching element, wherein the first switching element and one of the first diode element and the second diode element are stacked adjacently to each other in a vertical direction of respective electrode surfaces thereof via a conductive electrode, the second switching element and the other of the first diode element and the second diode element that is different from the diode element adjacent to the first switching element are stacked adjacently to each other in a vertical direction of respective electrode surfaces thereof via a conductive electrode, and the first switching element and the second switching element are not adjacent in a vertical direction

Abstract: A method for manufacturing a segmented laminated core is provided. This method includes (A) feeding a metal sheet to a progressive die, (B) stamping out workpieces in the progressive die, workpieces each include a plurality of pieces aligned in the circumferential direction with a circumferential part, and (C) fastening the workpieces together to obtain a segmented laminated core. The step (B) includes (b1) performing cutting-and-bending processing to form a slit line and a bending line across a region configured to be the circumferential part, (b2) returning by push-back a bent part that is a portion between the slit line and the bending line to an original position, and (b3) forming a swaged portion on the bent part. The step (C) includes (c1) fastening the workpieces by the swaged portion.

Abstract: There is provided a method for measuring a laminated iron core. The method includes preparing a laminated iron core in which two or more kinds of metal plates with different shapes are laminated and a deformed part is formed inside a hole continuing in a lamination direction of the laminated iron core, acquiring a surface profile data indicating a surface shape of the deformed part through an inlet of the hole by a non-contact sensor located in an outside of the hole, and calculating a length from the inlet of the hole to the deformed part in the lamination direction by a calculator based on the surface profile data.

Abstract: A stack formed by stacking a plurality of blanked members includes a first blanked member forming an outermost layer of the stack and a second blanked member located adjacent to the first blanked member. A through is hole formed in the first blanked member, and an area of the through hole has a length that is greater than a width. A connecting tab having a chevron shape is formed in the second blanked member so as to be fitted into the through hole of the first blanked member. On opposite sides of the through hole, notches are recessed outward from an inner-wall surface of the through hole in opposing directions that correspond to the width of the area of the through hole.

Abstract: A method of manufacturing an core product includes heating the resin pellet at a temperature higher than 25° C. for 24 hours or longer, the resin pellet being formed of a thermosetting resin composition including epoxy resin, a curing agent, accelerator, and a release agent. The method includes holding a core body having a resin formation region, which is a region in which a resin is to be formed by injection of a melted resin, between a pair of holding members, and disposing the heated resin pellet in a resin pot formed in at least one of the pair of holding members. Additionally, the method includes melting the resin pellet in the resin pot and injecting the melted resin into the resin formation region through a resin channel extending from the resin pot in communication with the resin formation region, and curing the melted resin injected into the resin formation region.

Abstract: A manufacturing method of a laminated core includes forming a first blanking member by blanking a band-shaped metal plate along a predetermined first blanking shape and forming a second blanking member by blanking the metal plate along a predetermined second blanking shape. The first blanking shape has a first-yoke corresponding region corresponding to a first yoke portion and a plurality of first-teeth corresponding regions corresponding to a plurality of first teeth portions. The second blanking shape has a second-yoke corresponding region corresponding to a second yoke portion and a plurality of second-teeth corresponding regions corresponding to a plurality of second teeth portions. The plurality of second-teeth corresponding regions are located between the plurality of first-teeth corresponding regions in a width direction one by one. The second teeth-corresponding region is located closer to one first-teeth corresponding region than a virtual straight line.