JPS59209042A - Manufacture of laminated core of rotary electric machine with skew - Google Patents

Abstract

PURPOSE:To enhance the accuracy of a skew by providing a plurality of guide holes at a core steel plates which are punched in a suitable shape, and displacing one by one from the guide holes in the same direction in the same size, thereby forming an irregular surface in the same direction. CONSTITUTION:A plurality of guide holes 4 are formed on core steel plates 1 which are punched in a suitable shape, displaced one by one from the guide holes 4 in the same direction in the same size to for an irregular surface 2. The plates 1 which are thus obtained are laminated in the prescribed number, and guide pins 12 are inserted into the holes 4 by upper and lower molds 10, 20 to be pressed. In this manner, a laminated core 1 having simple and accurate skew can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides caulking protrusions formed by extruding a core steel plate punched into an appropriate shape, partially on one side, and sequentially shifted in position according to the amount of skew. The present invention relates to a method of manufacturing a laminated iron core for a rotating electric machine having a skew in which the protrusions are overlapped and fitted into each other to form a ski and are integrally connected and fixed.

In the manufacture of iron cores for rotating electric machines, it has been known for a long time that as a method of laminating and fixing iron core steel plates, a plurality of 7-shaped protrusions are provided on the steel plates, and these are laminated and pressurized to fit and bond the protrusions to each other. .

However, when installing a rotor core pressure ski, conventionally, as shown in the plan view of FIG. 1 and the front sectional view taken along the A-A line of FIG. By sequentially shifting the position of the caulking protrusions according to the amount of skew and forming these protrusions 2 perpendicular to the laminated surface, the skewed slot opening 3 is formed. is obtained (Jitsukai Showa q-10s; z
).

In this way, in conventional laminated cores for rotating electric machines, it is necessary to stack them under pressure so that the protrusions λ are in the vertical direction, and it is difficult to improve the skinny accuracy. The windings varied by about 10%, which caused problems in terms of performance, and there were drawbacks such as the inability to automate the winding of the windings around the core.

The present invention overcomes the drawbacks of conventional methods and provides a method for manufacturing a laminated iron core for a rotating electric machine having a skew in which positioning is perfectly performed during lamination molding of the core so as to prevent deviations in the ski angle. That is its purpose.

The present invention is carried out by the following steps.

■ When punching a button of an appropriate shape from a steel core plate for a rotating electrical machine, each time a core is punched out, a part of the core is extruded and molded on one side of the core in a sequentially shifted position according to the amount of skiing to form caulking protrusions. At the same time, one or more guide holes are provided in the iron core steel plate so as to be sequentially shifted by the same amount as the protrusion.

■ Temporarily laminate these core steel plates.

@ Then, a guide rod is vertically inserted into the guide hole to vertically align the protrusion.

(2) Then, the temporarily laminated core steel plates are pressed in the vertical direction so that the protrusions fit together and are connected and fixed together.

FIG. 3 shows a perspective view of a laminated iron core for a rotating electric machine having a spindle according to the present invention formed in this manner. G is a guide hole for positioning used when laminating the core, and S is a hole for the rotating shaft.

In addition, the same reference numerals indicate the same or corresponding parts in all the drawings.

FIG. 4 is a side sectional view showing a mode of core lamination in one embodiment of the present invention.

The iron core provided with the caulking protrusion, the positioning guide hole L, the slot opening 3, and the rotating shaft hole S are temporarily laminated and placed on the suppressing downstream mold J.

At this time, the rotating shaft hole 5 of the laminated core l. Lower plate receiving holes U / and U corresponding to the guide holes are provided on the lower plate, and are positioned at 5 so that they match, and the suppression soil mold /
Below the rotational shaft hole 5. Upper die mandrel //, guide pin /, 2 corresponding to each guide hole q are provided, and these mandrels // and guide pin 12 are inserted into holes j-, A.

Then, each time one core is punched out, the skew angle for one core rotates, so the mandrel //.

Guide bin 7.2 into hole 5. As the head is inserted, the iron core rotates and becomes skewed. This skew is achieved by vertically inserting the mandrel//1 guide bin lλ into the holes j-, &, so that its positioning is accurate and a high-precision ski is attached.

Then, when the guide bin/λ passes through the guide hole,
The upper die 10 and the lower die pressurize the iron core to fit and fix the previously provided protrusions.

If the upper die 10 is raised after processing, a laminated iron core l having a highly accurate skew is formed.

(According to the present invention, caulking protrusions are formed by sequentially shifting their positions according to the amount of steel plate core skew, and positioning guide holes are provided by sequentially shifting their positions by the same amount of shift as the protrusions. Since the press is aligned in the vertical direction, a laminated iron core for rotating electric machines with a high degree of precision and force can be obtained, and it is possible to fully automate everything from fitting and forming the caulking protrusions to winding the winding wire. Become.

[Brief explanation of the drawing]

FIGS. 1 and 1 are plan views of iron cores by conventional means. The front sectional view taken along line AA, FIGS. 3 and 7 are a perspective view of a formed laminated core and a side sectional view of a forming means in one embodiment of the present invention. L...Iron core, K...Protrusion for caulking, 3...Slot opening, D...Guide hole, 5...Rotating shaft hole,
io...Suppressing soil mold, /ka...mandrel, /ko...guide bottle, 〃...lower mold for pressing, yu/, 22...hole. Applicant's agent Kiyoshi Inomata 1st figure J 2nd iris chrysanthemum 3rd figure

Claims (1)

[Claims] A core steel plate punched into an appropriate shape is provided with caulking protrusions formed by extruding a portion of it on one side and sequentially shifted in position depending on the number of skis, and these protrusions are overlapped. In a method for manufacturing a laminated core for a rotating electric machine having skis that are fitted together to form a skew and are connected and fixed together, seven or more guide holes are sequentially positioned in the core steel plate with the same displacement amount as the protrusion. In addition to staggering the
After temporarily stacking these core steel plates, a guide rod is vertically inserted into the guide hole to vertically align the protrusions, and then the temporarily stacked core steel plates are vertically pressed to fit the protrusions into each other. A method for manufacturing a laminated iron core for a rotating electric machine having a skew, which is characterized by joining and fixing the core together.