CN101588114B - Method for manufacturing iron core chute of motor segmental stamping - Google Patents

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

A kind of method for manufacturing iron core chute of motor segmental stamping

Technical field

The present invention relates to a kind of electric machine iron core skewed slot manufacture method, relate in particular to a kind of method for manufacturing iron core chute of motor segmental stamping.

Background technology

The electric machine iron core skewed slot can reduce the electric and magnetic oscillation and the noise of motor, design of electrical motor adopts iron core chute to optimize motor performance often, external diameter often adopts iron core chute less than the iron core of 1000mm, punching is the full circle punching, utilizes the taper key guiding and the pilot pin that laminate on the mandrel that laminate mould can laminate into skewed slot.And it is big, middle size motor is fixed, the rotor core external diameter is much larger than 1000mm, but silicon steel material width maximum is also below 1000mm at present, so can only adopt segmental punching, form circumference by the multi-disc segmental punching, the punching seam crossing gap of this circumference of will seeking common ground is even, laminate neat, skewed slot precision after laminating must be controlled in 5%, if the segmental punching iron core chute still adopts the taper key that laminates on the mandrel that laminates mould to lead, then the guiding taper key of arranging equal number on the mandrel by circumference punching quantity need laminated, the distribution consistency degree of guiding taper key must be consistent with the punching precision, and many places guiding taper key is assemblied in the slope that laminates on the mandrel also must be in full accord, adopts this process for stamping can't reach requirement at all.For this reason, at present the iron core of large-size machine have to move back and ask be designed to straight trough, thereby influenced the result of use of motor and reduced vibration, the noise objective of motor.

Summary of the invention

The object of the present invention is to provide a kind of segmental punching method for manufacturing iron core chute of guaranteeing to laminate back skewed slot precision, to improve the motor runnability, the vibration when reducing the motor operation reduces running noises.

Technical scheme of the present invention is: a kind of method for manufacturing iron core chute of motor segmental stamping, described iron core is overrided to form by punching, every layer of punching is made up of two above segmental punchings, the skewed slot of iron core is that every layer of punching laminates back formation, it is characterized in that, from second layer segmental punching, the groove radial centre lines of every layer of segmental punching is with respect to a groove radial centre lines skew angle (can be described as " the deviation angle ") α of the segmental punching of front one deck $\mathrm{\α}=\mathrm{arctg}\frac{L}{R},$ L is the displacement of every layer of punching in the formula, $L=\frac{b}{n}*\mathrm{arctg}\frac{b}{a},$ R is the punching exradius, and a is a core length, and b is the skewed slot distance, and n is the punching number of plies, and the punching device of segmental punching skewed slot is the high-speed numeric control notching press.

Described segmental punching is a punch forming at twice, and subpunch makes fanning strip base sheet, punching out groove again.

Each layer of described segmental punching has all been done a layer mark, ground floor be labeled as 1, the second layer be labeled as 2, by that analogy, the n layer be labeled as n, described iron core is that punching is overrided to form from 1 to n successively by the mark in the punching.

Effect of the present invention: because the precision of skewed slot is only relevant with the precision of deviation angle α, and the precision of deviation angle α is guaranteed by the high-speed numeric control notching press, the precision height of high-speed numeric control notching press, therefore laminate back skewed slot precision height, can be controlled at fully in 2%, realize the skewed slot manufacturing of segmental punching iron core, thereby improve the runnability of motor effectively by the punching out punching, vibration when reducing the motor operation reduces running noises.

Description of drawings

Fig. 1 is a segmental punching iron core schematic diagram;

Fig. 2 is one deck segmental punching distribution map;

Fig. 3 is the segmental punching shape schematic diagram after the punching out for the first time;

Fig. 4 is ground floor and second layer segmental punching jet-bedding deviation angle α schematic diagram.

Among the figure: 1, segmental punching, 2, the skewed slot center line, 3, skewed slot unshakable in one's determination, 4, the jet-bedding location hole, 5, the ground floor segmental punching, 6, second layer segmental punching.

Embodiment

The invention will be further described below in conjunction with accompanying drawing.

With reference to Fig. 1, Fig. 2, a kind of motor segmental stamping iron core, this iron core is to be overrided to form by punching, every layer of punching is made up of 6 segmental punchings 1, and iron core chute 3 is that every layer of punching laminates back formation, segmental punching 1 punching out at twice, with reference to Fig. 3, at first punching out goes out the base sheet of segmental punching 1; With reference to Fig. 2, Fig. 3 and Fig. 4, with 4 location of two jet-bedding location holes in the base sheet, go out ground floor segmental punching 5 by drawing, and do mark 1, during punching out second layer segmental punching 6, the skewed slot radial centre lines of second layer segmental punching 6 is with respect to the skewed slot radial centre lines of ground floor segmental punching 5 angle [alpha] of skew and punching out goes out second layer segmental punching 6, and does mark 2, deviation angle α is by artificial calculating $\mathrm{\α}=\mathrm{arctg}\frac{L}{R},$ Wherein L is the displacement of every layer of punching, $L=\frac{b}{n}*\mathrm{arctg}\frac{b}{a},$ R is the punching exradius, a is a core length, b is the skewed slot distance, and n is the punching number of plies, in order to ensure the precision of deviation angle α, the punching device of punching skewed slot is the high-speed numeric control notching press, analogize in proper order, from second layer segmental punching, the skewed slot radial centre lines of each layer segmental punching is with respect to angle [alpha] of skewed slot radial centre lines skew of last layer segmental punching, each layer segmental punching all carries out mark, the n layer be labeled as n.

When laminating iron core, laminate successively from 1 to n by the mark on the segmental punching.

Claims (2)

1. method for manufacturing iron core chute of motor segmental stamping, iron core is overrided to form by punching, every layer of punching is made up of two above segmental punchings, the skewed slot of iron core is that every layer of punching laminates back formation, it is characterized in that, from second layer segmental punching, the groove radial centre lines of every layer of segmental punching is with respect to angle [alpha] of groove radial centre lines skew of the segmental punching of front one deck

L is the displacement of every layer of punching in the formula,

R is the punching exradius, a is a core length, b is the skewed slot distance, and n is the punching number of plies, and each layer of segmental punching has all been done a layer mark, ground floor be labeled as 1, the second layer be labeled as 2, by that analogy, the n layer be labeled as n, described iron core is that punching is overrided to form from 1 to n successively by the mark in the punching, can guarantee that iron core laminates order and skewed slot precision; The punching device of segmental punching skewed slot is the high-speed numeric control notching press.

2. according to claims 1 described a kind of method for manufacturing iron core chute of motor segmental stamping, it is characterized in that described segmental punching is a punch forming at twice, subpunch is made fanning strip base sheet, punching out groove again.

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