Punching equipment for punching sheet of motor iron core, punching method of ultrathin iron-based sheet and manufacturing method of motor iron core

Abstract

The invention discloses punching equipment for a punching sheet of a motor iron core, a punching method of an ultrathin iron-based sheet and a manufacturing method of the motor iron core. The ultrathin iron-based sheet comprises an amorphous sheet, a nanocrystalline sheet, a silicon steel sheet with the thickness of 0.05-0.15mm and other magnetic conductive ultrathin materials. The punching equipment for the punching sheet of the motor iron core comprises a lower die, an upper die matched with the lower die, a lower die pressing mechanism which is arranged on the lower die and used for pressing a silicon steel strip to enable the silicon steel strip to be tightly attached and fixed to the upper surface of the lower die, and a punching machine driving mechanism which is connected with the upper die to drive the upper die to move downwards to punch a lower silicon steel punching sheet from the silicon steel strip or punch an ultrathin iron-based punching sheet from the ultrathin iron-based strip. According to the punching equipment for the punching sheet of the motor iron core, a zero-to-zero punching process is realized by punching the ultrathin iron-based strip by means of the restpart of the silicon steel strip after the silicon steel punching sheet is punched, the requirement for the machining precision of a machine tool and a die due to the fact that the to-be-punched sheetis too thin is lowered, and then the punching cost of the ultrathin iron-based sheet is reduced.

Description

technical field [0001] The invention relates to a sheet punching equipment for a motor iron core, a punching method for an ultra-thin iron-based sheet, and a manufacturing method for a motor iron core. Background technique [0002] The stator core of the motor is the heart of the motor. Miniaturization, high efficiency, high power density, high frequency and high speed are the development trends of the future motor, which puts forward higher requirements for the electromagnetic performance of the stator core, and high-performance motors require The smaller the iron loss of the motor, the better (in order to reduce the heating of the motor), so it is hoped that the thinner the iron chip, the better (it can effectively reduce the eddy current loss of the iron chip) or use a new core material. Iron chips are usually made of silicon steel sheets (silicon steel sheets) or ultra-thin iron substrates, which are collectively referred to as sheets below. Sheets with a thickness great...

AI Technical Summary

Problems solved by technology

In addition to being "thin", the ultra-thin sheet also has the characteristics of "hard" and "brittle". Due to the special production process, the iron-based ultra-thin sheet has poor processability (for example, the hardness is increased by 5-6 times), and because the ultra-thin sheet Too thin leads to high requirements on the machining accuracy of the mold, which is difficult to achieve. If direct stamping is used, it will cause large burrs, tearing, unbroken, bending, etc., so that batch stamping cannot be realized. The mold fit precision and mold material are all very high, the equipment is extremely difficult to realize, and the production cost of equipment and iron core is high, so it cannot be applied on a large scale.

[0003] Therefore, ultra-thin sheet processing is usually processed by wire-cutting, and wire-cut processing is inefficient. First, it is difficult to mass-produce, and secondly, the high-efficiency motors made of ultra-thin sheets are expensive and cannot be widely promoted.

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