A method for stamping and stacking sheet metal parts to form lamination stacks is disclosed. In order to facilitate the separation of joined sheet metal parts into lamination stacks, a second stamping-out of at least one second sheet metal part is performed in a step preceding the first stamping-out, as well as a pushing-back of the separating element into a region of the electrical steel strip from which the second sheet metal part has been stamped and a pushing-out of the separating element from the electrical steel strip with the first stamping-out.

Disclosed is a process for the blanking of metal parts, in which a multi-layered basic material with a number of mutually stacked, preferably essentially identical, individual layers is placed and clamped partly between a blanking die and a blank holder and partly between a blanking punch and a counter punch and wherein the blanking punch and the counter punch that are moved relative to the blanking die and the blank holder over a distance corresponding to at least a thickness of the multi-layered basic material whereby several blanked parts are cut and separated from the multi-layered basic material.

Disclosed is a process for the blanking of metal parts, in which a multi-layered basic material with a number of mutually stacked, preferably essentially identical, individual layers is placed and clamped partly between a blanking die and a blank holder and partly between a blanking punch and a counter punch and wherein the blanking punch and the counter punch that are moved relative to the blanking die and the blank holder over a distance corresponding to at least a thickness of the multi-layered basic material whereby several blanked parts are cut and separated from the multi-layered basic material.

A method of manufacturing a laminated iron core includes: inserting a plurality of electrical steel strips in a superposed state to feed rolls including a pair of upper and lower feed rolls that are driven by a drive device to feed the electrical steel strips in a superposed state into a die having a plurality of punching processes in sequence; joining a part or all of the superposed electrical steel strips together before entering the die or at an upstream stage portion of the die after feeding out the electrical steel strips from the pair of upper and lower feed rolls; and punching simultaneously the plurality of electrical steel strips in a superposed state in the die.

A method of manufacturing a laminated iron core includes: inserting a plurality of electrical steel strips in a superposed state to feed rolls including a pair of upper and lower feed rolls that are driven by a drive device to feed the electrical steel strips in a superposed state into a die having a plurality of punching processes in sequence; joining a part or all of the superposed electrical steel strips together before entering the die or at an upstream stage portion of the die after feeding out the electrical steel strips from the pair of upper and lower feed rolls; and punching simultaneously the plurality of electrical steel strips in a superposed state in the die.

A method of manufacturing a laminated core includes supplying a stator material to a punching device and obtaining an electromagnetic steel plate corresponding to a rectangular processed body by punching the stator material. To obtain the electromagnetic steel plate ES, a slit is formed outside a processed body forming area in the stator material along a long side of the processed body forming area, and a center portion of the processed body forming area is punched out in a circular shape. Additionally, the processed body forming area is punched out after the slit is formed and the center portion is punched out. The laminated core is obtained by laminating and fastening a plurality of the electromagnetic steel plates.

In order to produce a clutch pack (3), clutch plates are cut from an electrical steel strip or sheet, arranged on top of one another to form the clutch pack (3) and connected to one another within the clutch pack (3). The material of the clutch plates is locally plasticised in the edge region via the generation of frictional heat by means of at least one tool (9′), in such a way that the material of at least adjacent clutch plates is mixed with the tool (9′) such that, after the plasticised material has cooled, these clutch plates are integrally connected to one another. The device used for this purpose has at least one punch press and/or at least one receiving means for one or more clutch packs (3). In addition, the device has at least one welding tool that is rotatably driven about its axis and can be moved in a transverse direction to its rotational axis.

In order to produce a clutch pack (3), clutch plates are cut from an electrical steel strip or sheet, arranged on top of one another to form the clutch pack (3) and connected to one another within the clutch pack (3). The material of the clutch plates is locally plasticised in the edge region via the generation of frictional heat by means of at least one tool (9′), in such a way that the material of at least adjacent clutch plates is mixed with the tool (9′) such that, after the plasticised material has cooled, these clutch plates are integrally connected to one another. The device used for this purpose has at least one punch press and/or at least one receiving means for one or more clutch packs (3). In addition, the device has at least one welding tool that is rotatably driven about its axis and can be moved in a transverse direction to its rotational axis.

The present invention relates to an apparatus (100) for notching. The apparatus (100) comprises a frame with a first stand (104), a second stand (108) and a headpiece (106) connecting the first stand (104) and the second stand (108), wherein the stands (104, 108) are arranged to be offset along an x axis with respect to each other. Furthermore, the apparatus (100) comprises a plunger (114), which is coupled to the headpiece (106) and is movable along a punching axis (116) extending along a y axis.

The present invention relates to an apparatus (100) for notching. The apparatus (100) comprises a frame with a first stand (104), a second stand (108) and a headpiece (106) connecting the first stand (104) and the second stand (108), wherein the stands (104, 108) are arranged to be offset along an x axis with respect to each other. Furthermore, the apparatus (100) comprises a plunger (114), which is coupled to the headpiece (106) and is movable along a punching axis (116) extending along a y axis.