KR960003204B1 - Manufacturing method of the rotor for the compressor motor - Google Patents

Abstract

The method for manufacturing a rotor in a compressor motor comprises the steps of: (1) inserting a predetermined size of hole formed at the center of a plurality of core plates to the circumference of a fixing pin; (2) filling an aluminium layer in the space limited by the minor diameter of the core plates and the fixing pin by aluminium die casting the structure obtained by the step (1); (3) removing the fixing pin from the structure obtained through the step (2) and finely working the aluminium layer and the circumference of the core plates; and (4) heating and expanding the structure obtained through the step (3), inserting a crank shaft of a compressor and then contracting the structure to stick the minor diameter of the aluminium layer fast to the crank shaft.

Description

Rotor manufacturing method of compressor motor

1 is an exploded perspective view of the fixing pin and the core of the present invention.

Figure 2 is a cross-sectional view of the die casting aluminum to the fixing pin and the core combined.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a sectional view of a compressor motor equipped with a rotor obtained in the present invention.

* Explanation of symbols for main parts of the drawings

1: Fixing pin 2,3: Space protrusion

4: core 5: hole

6: pore 7: aluminum layer

The present invention relates to a method for manufacturing a rotor of a compressor motor in which the core diameter of the rotor is inserted without directly contacting the crank shaft so that the magnetic flux of the rotor is not lost through the crank shaft.

Conventionally, most rotors are press-fitted with several cores stacked on a fixed pin, and then inserted into an aluminum die casting mold, and then the fixed pins are separated to precisely process the inner and outer diameters of the rotor and press-inserted into the crankshaft. This is because the core of the core is in close contact with the crankshaft, so that the magnetic flux of the rotor is lost through the crankshaft. Also, the inner diameter of the core is wrapped in aluminum to correct the defect and increase the efficiency. What is given is that it is installed in the aluminum die casting mold to give a certain space between the outer diameter of the crankshaft and the inner diameter of the core, so that aluminum is filled in the space, which makes it difficult to position the crankshaft in the die. Most of them use the above rotor with loss of magnetic flux It was in.

In the present invention, the rotor is laminated with aluminum to the inner diameter of the core of the conventional rotor as described above, regardless of the crankshaft in the manufacturing process, so that three or more projections on the outer circumferential surface of the conventional fixing pin to facilitate the aluminum die casting operation, the outer diameter of the fixing pin By die-casting aluminum between the inner diameter of the core, will be described in detail according to the following embodiments of the drawings.

In Fig. 1, reference numeral 1 denotes a fixing pin. The fixing pin 1 protrudes space projections (2) and (3) in three directions on an outer circumferential surface of a conventional two-stage fixing pin. As indicated by, several small holes 6 are drilled around the hole 5.

EXAMPLE

[Step 1]

The inner diameter of the hole 5 of the above-mentioned cores 4 is inserted into the side of the fixing fan 1 having a large diameter so that the space projection 3 is in close contact with the inner diameter of the hole 5, and the Several cores (4) having a small inner diameter are inserted into the fixing pin (1) on the thin side so that the space projection (2) is in close contact with the inner diameter of the hole (5), and the small holes (6) perforated in the respective cores (4). It is stacked so as to be in communication with each other to form an assembly of the core (4) and the fixing pin (1).

[Step 2]

The assembly carried out in the first step of the above embodiment is the inner diameter of each core 4 and the outer circumferential surface of the fixing pin (1) except for the space projections (2), (3) by the space projections (2), (3) As the space is formed in the direction, it is loaded into the aluminum die casting mold to die cast the aluminum layer 7 so as to be in the cross-sectional view as shown in FIG. 2 and FIG.

[Step 3]

The fixing pin 1 is removed from the die-casted aluminum in the step 2 to form an unfinished rotor, and then the fixing pins other than the three-way recessed space formed by the inner diameter of the rotor, that is, the space protrusions 2 and 3 The inner peripheral surface formed by the outer peripheral surface of) and the outer peripheral surface of the rotor are processed precisely to make a finished product.

[Step 4]

Applying heat to the entire finished product made in step 3 above, expand and expand the precision machined inner circumferential surface, insert it into the crankshaft 9 of the compressor motor 8 shown in FIG. 4, and then cool the inner circumferential surface due to shrinkage of the expanded rotor. Therefore, to be in close contact with the crank shaft.

In the present invention as described above, since the inner diameter of each core 4 is covered with aluminum, as shown in FIG. 4, the rotor is in close contact with the outer circumferential surface of the crankshaft 9 of the overlaid aluminum. Since the magnetic flux of the rotor is not transmitted to the crankshaft because it is connected, the magnetism does not disappear and the rotation rate is higher than the inner diameter of the core directly contacting the outer circumference of the conventional crankshaft, and the space projection (2) on the outer circumferential surface of the fixing pin (1). , (3) is formed by stacking and inserting several cores (4) on the outer peripheral surface of the fixing pin (1), and then placing the die in an aluminum die casting mold, so that a constant space is maintained between the outer peripheral surface of the crankshaft and the inner diameter of the core in the conventional mold. As much as possible, rather than aluminum die-casting in the space, it is easy to work and can produce large quantities.

Claims (1)

(A) Space projections 2 in the three directions of the holes 5 of the plurality of core plate 4 formed with a predetermined size of the hole (5) in the center and a plurality of small holes (6) around the body , (3) forcing the respective small holes (6) to the outer circumferential surface of the fixing pin (1) protrudingly fitted; (B) The aluminum layer 7 is loaded on the space defined by the inner diameter of the laminated core plate 4 and the fixing pins 1 by loading the intermediate material passed through step (a) into a die casting mold and aluminum die casting. Filling; (C) Remove the fixing pin (1) from the intermediate through the step (b) and the outer peripheral surface of the aluminum layer 7 and the laminated core plate 4 filled in the inner diameter of the laminated core plate 4 Precision machining and (D) heating and expanding the intermediate, which has undergone the above (C), to insert the crankshaft 9 of the compressor, and then contract the intermediate to shrink the inner diameter of the aluminum layer 7 and the crankshaft. The rotor manufacturing method of the compressor motor provided with the step of closely contacting (9).

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