Method for manufacturing iron core chute of motor segmental stamping

Abstract

A method for manufacturing an iron core chute of motor segmental stampings is provided. The iron core is superposed by the stampings, each layer of the stampings is composed of two segmental stampings. The iron core chute is formed by superposing each layer of stamping, characterized in that from the second layer of segmental stamping, a chute radial central line of each layer of segmental stamping offsets an offset angle alpha=arctg(L / R) with respect to that of the previous layer, wherein L is displacement of each layer of stamping, L=(b / n)*arctg(b / a), R being exradius of the stamping, alpha being length of the iron core, n being the layer number of stampings. A punching device of the segmental iron core chute is a high speed numerical control notching machine. The iron core chute of the motor segmental stampings manufactured by the invention can improve operating performance of the motor, reduce vibration of the motor when operating and reduce operating noise.

Description

technical field [0001] The invention relates to a method for manufacturing a motor iron core chute, in particular to a method for manufacturing a motor fan-shaped punched iron core chute. Background technique [0002] The motor core chute can reduce the electromagnetic vibration and noise of the motor. The motor design often adopts the iron core chute to optimize the performance of the motor. The iron core with an outer diameter of less than 1000mm often uses the iron core chute. The punching is a full circle punching. The oblique key guides and guide pins on the lamination mandrel of the lamination mold can be laminated into inclined grooves. The outer diameter of the stator and rotor cores of large and medium-sized motors is much larger than 1000mm, but the maximum width of the silicon steel sheet material is less than 1000mm at present, so only fan-shaped punches can be used, and the circle is composed of multiple fan-shaped punches, which requires the same circumference....

AI Technical Summary

Problems solved by technology

The outer diameter of the stator and rotor cores of large and medium-sized motors is much larger than 1000mm, but the maximum width of the silicon steel sheet material is less than 1000mm at present, so only fan-shaped punches can be used, and the circle is composed of multiple fan-shaped punches, which requires the same circumference. The gap between the stamping joints is even, and the lamination is neat. The accuracy of the chute after lamination must be controlled within 5%. It is necessary to arrange the same number of guide oblique keys according to the number of circumferential punches on the lamination mandrel. The distribution uniformity of the guide oblique keys must be consistent with the punching accuracy, and the slope of multiple guide oblique keys assembled on the lamination mandrel It must also be completely consistent, and this stamping method cannot meet the requirements at all

For this reason, at present, the iron core of large motors has to be designed as a straight slot, which affects the use effect of the motor and reduces the vibration and noise indicators of the motor.

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