Manufacturing method of segment core, segment core and iron core manufactured by using method

Abstract

The invention discloses a manufacturing method of a segment core, the segment core and an iron core manufactured by using the method. The manufacturing method of the segment core comprises the following steps: step one, coating insulating layers on two surfaces of a lamination; step two, then coating bonding layers on two surfaces of the lamination coated with the insulating layers respectively; and step three, bonding a plurality of laminations coated with the insulating layers and the bonding layers together to form a group, wherein one segment core is formed in each group. Through the technical scheme, the coating manner of the bonding layers is relatively uniform, the adhesion stress is also uniform, tight lamination among the laminations is guaranteed, the iron core can reach an extremely high overlying coefficient, and the positioning is simple, so that the overlying coefficient and overlying quality of the laminations are guaranteed.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a method for manufacturing a segmented iron core, a segmented iron core and an iron core manufactured using the method. Background technique [0002] At present, in the production process of the motor, the motor stator and rotor are formed by laminating the stator and rotor core punches. The stacking coefficient of the motor core punching sheet is an important index to measure the stacking of the core. The thickness after lamination is generally greater than the actual thickness, and the ratio of the actual thickness to the thickness after lamination is the lamination coefficient. The larger the lamination coefficient, the higher the lamination density and the higher the lamination quality. The high lamination coefficient can prevent loosening caused by mechanical vibration and temperature rise, so that the iron core always maintains a regular shape without serious fanning. [...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, when the punching sheets are laminated, the two ends of the iron cores that are simply stacked together are generally mechanically pressurized, and the punching sheets and the rotating shaft have an interference fit. The pressure is not enough, it is difficult to achieve the specified lamination coefficient

For example, when the rotor core of a permanent magnet synchronous motor is long, there are often problems such as uneven stacking, and the stacking coefficient is difficult to reach the design index.

And when the rotor core is longer, it is more difficult to locate the punching plate, and it is necessary to design complex guiding tooling

[0004] Therefore, this method of single-chip lamination will not only affect the lamination coefficient and lamination quality, but also seriously affect the production efficiency, and the process is complicated

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