JPS5923174B2 - How to align stator cores with reference positions - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for safely and quickly aligning a plurality of uneven stator cores in the process of manufacturing a stator for an electric motor.

Conventionally, in the process of manufacturing a stator, as is well known, cores punched out by press processing are piled up from a few dozen to around 100 pieces and fixed together by welding or pin tightening.
During this process, there is no problem if the cores are taken out of the press in an orderly manner and then subjected to tightening or tightening work while the cores are in a uniform state. If this is the case, there will be intermediate work involved in transporting it to the location.

In addition, when low-quality materials require annealing to improve their magnetic properties, the reality is that stator cores often become stacked unevenly while traveling back and forth between workshops.

In such cases, conventionally, it was necessary to intervene each time,
Unexpected situations such as damage to the core itself that tends to occur due to interrupting related work to request assistance or manual intervention, and injuries to fingers and fingers caused by handling the core are likely to occur.
There were drawbacks such as the flow of the process being obstructed and problems occurring each time.

In view of the foregoing, it is an object of the present invention to provide a method for safely and quickly aligning important cores at one time without requiring much manpower.The present invention will be described below with reference to an illustrated embodiment.

First, in order to implement this, it is necessary to set alignment standards for each stator core in advance, but among the dimensions of each part of the core 1 shown in FIG. 1, for the slit dimension A (slot opening), Only one A10 slit is used as the alignment reference slit.
．． Expand it to 5%.

In order to apply the above values to tilted models with different core sizes, the slit size A is always the standard slit size only, even if there is a slight difference. Only the demon needs to be added, and as will be explained later, the minimum shaft thickness of the rotating shaft is added to this part A + o, 3z
is inserted, and all the cores that were picked up can be aligned here, and the condition for the rotating shaft side is that the width of the slot bottom is smaller than C. This requires a dimensional constraint that allows rotation.

On the other hand, the apparatus used in the present invention is a simple one in which a rotating shaft 3 is attached to a table 6 equipped with a motor 5 shown in FIG. Various shapes as shown in each figure can be arbitrarily selected.

In either case, it is essential that all the dimensional conditions shown in each figure in FIG. 3 be met.

For example, if the rotating shaft has a round cross section, it would be too thin to fit within the standard slit A + 0.5%, and it would not be possible to support several cores at once. I'm jealous that I don't have it.

Furthermore, in the case of the original model, even if the shaft rotates, the speed at which each core rotates with each other is high, making it difficult to align each core and send it quickly to the reference slit.

Therefore, the rotation axis must have a cross-sectional shape close to an ellipse, or a reinforcing shape that can be easily inferred from the ellipse (as shown in the third figure).

The basis for limiting the dimensions is that even when applied to various stators of different models, the slit A (slot opening)
, the relationship between the polar arc length B, the slot bottom width C, and the minimum rotation axis,
The method of the present invention will not work unless the maximum Kashihara numerical limit is met.

That is, the minimum Kashiwara dimension is A+0.3 or more for the slits A (slot openings) of stator cores 1 and 2,
The maximum Kashihara dimension is A (slit) + B (polar arc length), and C (
Slot bottom width) or smaller than A + 0.3X and smaller than C, so that the core rotates with the rotation of the shaft and is still able to rotate even after the rotation shaft enters the slot. This is why limitations are required.

The present invention uses the above-mentioned device to take out an appropriate amount of irregular stator cores (approximately enough for one electric motor), passes the shaft 3 through the inner periphery of the group of cores 1 and 2 as shown in FIG. If the cores are stopped by the core stopper 4 and the motor 5 is driven while blowing air or other means to prevent adjacent cores from coming into close contact with each other, the rotation of the rotating shaft 3 will move the cores 1 and 2 individually. Separately, the core alignment reference slit (A+o, 5z part) and the minimum shaft thickness part (A+0.3
When 1) coincides, the shaft enters the slot, each core falls down to the slot bottom width C, and the rotating shaft itself continues to rotate within the slot until all cores are aligned. Stop it at that point.

In this way, the shafts can be removed from the slots and all the cores can be aligned in a very short time.

Incidentally, the table below compares the results of the conventional method involving manual intervention and the method of the present invention.

As mentioned above, the efficiency increases as the number of sheets increases, but according to the method of the present invention, the cores can be aligned safely and in a short time without bending the cores or hurting the hands or fingertips, which saves labor. It not only greatly contributes to improving efficiency, but also has the remarkable effect of smoothing the flow of a series of processes, including related work.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a stator core provided with the reference position of the present invention, Fig. 2 is a perspective view showing an example of the method of the present invention, and Fig. 3 each figure shows the shape of the rotating shaft used in the present invention. FIG. 3 is a cross-sectional view of each example. 1... Cores (or group of cores) that have been assembled,
2...Irregular cores (or group of cores), 3
... Rotating shaft, 4 ... Core stop, 5.
...Motor, 6...... units.

Claims (1)

[Claims] 1. The minimum shaft original dimension of the rotating shaft is A-) -0.3% of the stator core slit dimension A. 1. The maximum shaft thickness dimension is the ten pole arc length B of the slit A, and the bottom width of the slot C. or mold it so that it is smaller than the bottom width C of the slot with A + 0.3%, and only one part of the slot l-A of each stator core is A + 0.5, which is the alignment standard. %, each stator core rotates as the rotating shaft rotates, and each stator core fits into the minimum thickness part of the shaft from the alignment reference slit, and while the shaft rotates within the slot having the alignment reference slit, all of the stator cores rotate together. A method of aligning stator cores with a reference position, characterized in that the stator cores are aligned.