JPH02250645A - Coating of rotor in rotary electric machinery - Google Patents

Abstract

PURPOSE:To efficiently and effectively make coating treatment when a resin material is coated by shaping the coated surface of the resin material by rotating a rotor after bringing a vibrating body which makes ultrasonic vibrations nearer to the coated surface. CONSTITUTION:The part of a rotor 1 to which a coating material 7 is adhered is shaped. When the rotor 1 is shaped, the rotor 1 is brought nearer to a metallic mold 8 making ultrasonic vibrations while the rotor 1 is rotated at a required speed so that the impregnation of a slot and coil 5 with the coating material 7 can be facilitated and, at the same time, the coating material 7 can be shaped by means of the metallic mold 8 making the ultrasonic vibrations. Since the metallic mold 8 makes the ultrasonic vibrations in such way, the coating material 7 does not adhere to the surface of the metallic mold 8 and the slot 4 and coil 5 can be impregnated efficiently with the coating material 7. As a result, almost all of the coating material 7 can be used effectively for integrally rigidifying the rotor 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of coating a rotor in a rotating electric machine such as a motor.

[Prior art and problems to be solved by the invention] Generally,
In this type of rotor, it is necessary to prevent the coils inserted into the unrods from loosening or the insulating material from peeling off due to the centrifugal force generated when the rotor rotates at high speed. The rotor surface is coated with a coating material such as epoxy resin adhesive to increase the overall rigidity.

Some coating materials are powder-type, and in such cases, the coating material is attached to a heated rotor, the liquefied coating material is then shaped, and finally the coating material is reheated to heat cure it. However, when shaping the coating material,
It is necessary to deeply impregnate the inside of the slot or coil with the coating material, and it is also necessary to remove the coating material attached to the outer periphery of the teeth of the rotor.

Conventionally, this problem has been dealt with by pressing the roller 10 against the outer circumferential surface of the rotor, but with this method, the coating material adheres to the roller 10 and hardens, and the hardened coating material adheres to the roller 10 and is often removed. The coating material should not be removed from the roller 1 because it would be necessary to remove it and the workability would be degraded.
There was also a problem from an economical point of view, as an extra amount was needed to compensate for the waste that would be attached to the zero.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a coating method for a rotor of a rotating electrical machine that can eliminate these drawbacks. The rotor, which has coils inserted into slots, is coated with a resin material, and a vibrator that vibrates ultrasonically is brought into contact with the coated surface, and the rotor is shaped while being rotated. It is something to do.

According to the present invention, with this configuration, the rotor coating process can be carried out efficiently and efficiently.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawing, 1 is a rotor of a motor, and the rotor 1
A rotor shaft 2, a core 3 fitted on the rotor shaft 2 and rotating integrally with the rotor shaft 2, a coil 5 inserted and wound in a slot formed between the teeth 4a of the core 3, and a brush (Fig. The components such as the commutator 6 that come into sliding contact with the commutator 6 (not shown) are all the same as before.

7 is a thermosetting powder type coating material (adhesive) for coating the surface of the rotor 1, and the coating procedure is as follows: 1 rotor shaft 2. The outer periphery of 273 parts excluding parts that do not require coating such as the 6 parts of the commutator and the parts that require coating such as the 5 parts of the coil are immersed to adhere and liquefy the powder coating material 7, and then the coating material 7 is shaped. Then, the coating process is performed by finally heating again to heat and harden the deposited coating material 7.

8 is a mold for shaping the outer peripheral surface of the rotor 1;
The distal end of the mold 8 has a shape that roughly corresponds to the external shape of the portion of the rotor 1 to be coated, and the base end of the mold 8 is connected to a vibration generator 9, and when the vibration generator 9 operates, the mold 8 is connected to a vibration generator 9. It is configured to vibrate ultrasonically. The portion of the rotor 1 to which the coating material 7 is attached will be shaped, but in that case, the rotor 1 will be reshaped by a separately provided rotational movement device (
(not shown) and rotates at a required speed to approach and confront the ultrasonically vibrating mold 8, thereby promoting impregnation of the coating material 7 into the slot 4 and the coil 5. It has become.

In the embodiment of the present invention configured as described above, when coating the rotor 1, the coating material 7 is shaped by the mold 8 that vibrates ultrasonically.

In other words, in the present invention, the outer surface of the rotor 1 is shaped by bringing the mold 8 into contact with the portion of the rotor 1 to which the coating material 7 is attached before the coating material 7 hardens. In this case, since the mold 8 is vibrating ultrasonically, the coating material 7 does not adhere to the surface of the mold 8 and can be efficiently impregnated into the slot 4 and the coil 5. Almost all of it will be effectively used to make the rotor 1 integrally rigid. Therefore, unlike in the conventional case, the problem of the moting material 7 adhering to the forming roll side is eliminated, and the troublesome work of cleaning the rolls is no longer required. The amount that would otherwise be wasted by adhering to the forming rolls can be saved, resulting in excellent workability and economy.

Incidentally, in the mold 8 used in this example, the distance between the mold 8 and the rotor 1 is large on the upper side with respect to the rotation direction of the rotor 1, and gradually becomes smaller toward the lower side. The shape of the contact surface is set so that there is no gap in the sliding state, and this allows the coating material 7 to reliably enter the gap between the mold 8 and the rotor 1 during the coating process. Active impregnation of the coating material 7 into the slot 4 and the coil 5 is promoted.

It should be noted that the present invention is of course not limited to the above-mentioned embodiments, and the coating material may be liquid. Even if it is a type of coating material, it can be coated without any problem.

[Operations and Effects] In summary, the present invention is configured as described above, so when the rotor is coated to make it integrally rigid, the outer circumferential surface of the rotor to which the coating material is adhered is the ultrasonic vibrator. This will result in plastic surgery. Therefore, the coating material is prevented from adhering to the vibrating body side, which is the case with conventional roll shaping, and the coating material is not wasted and the attached amount is used to effectively increase the rigidity of the rotor. It will be used as a component. As a result, the rotor shaping work can be done efficiently, significantly improving productivity, and the coating material can be actively impregnated into the slots and coils, resulting in a highly reliable and highly rigid rotor. can be provided in large quantities and at low cost.

[Brief explanation of drawings]

The drawings show an embodiment of the method of coating a rotor in a rotating electric machine according to the present invention, and include FIGS.
B is an explanatory diagram showing a method for shaping the outer circumferential surface of a rotor, and FIG. 2 is an explanatory diagram showing a conventional example. In the figure, 1 is a rotor, 4 is a slot, 5 is a coil, 7 is a coating material, and 8 is a mold. Figure 2

Claims (1)

[Claims] A rotating electric machine characterized in that a rotor comprising a coil inserted into a slot is coated with a resin material, and a vibrating body that vibrates ultrasonically is placed in contact with the coated surface, and the rotor is shaped while being rotated. rotor coating method.