CN210093072U

CN210093072U - Rotor cast aluminum middle sleeve die

Info

Publication number: CN210093072U
Application number: CN201921071966.9U
Authority: CN
Inventors: 黄先锋; 刘憬奇; 霍燕燕; 刘强; 杨祖伟
Original assignee: Shanghai Electrical Apparatus Research Institute Group Co Ltd; Shanghai Motor System Energy Saving Engineering Technology Research Center Co Ltd; Shanghai Dianke Motor Technology Co Ltd
Current assignee: Shanghai Electrical Apparatus Research Institute Group Co Ltd; Shanghai Motor System Energy Saving Engineering Technology Research Center Co Ltd; Shanghai Dianke Motor Technology Co Ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-02-18
Anticipated expiration: 2029-07-10

Abstract

The utility model discloses a cover die in rotor cast aluminium, a serial communication port, do the well cover die body that the nitridation was handled including the surface, the equipartition has many air discharge ducts of avoiding cast aluminium in-process aluminium liquid to spill over on the inner wall of well cover die body. The utility model provides the high quality of rotor cast aluminium, the product percent of pass reaches 98%, avoids spilling over of rotor surface aluminium water, has reduced the work load of rotor turning, for towards the air gap technology establish the basis, has cancelled the turning rotor process, has improved production efficiency.

Description

Rotor cast aluminum middle sleeve die

Technical Field

The utility model relates to a cover die in rotor cast aluminum for in the motor cast aluminum process manufacturing scheme, belong to middle-size and small-size motor and make technical field.

Background

According to the traditional process for finely turning the outer circle of the rotor, the turning tool is used for intermittently cutting and quickly wearing, the time for sharpening and installing and adjusting the tool is prolonged, and the working efficiency is reduced. And after the excircle of the rotor is finely turned, the inverted teeth, the inverted sheets and burrs are formed to cause adhesion between the sheets, the surface of the rotor generates loss due to eddy current, and the efficiency of the motor is reduced. Meanwhile, scrap iron and aluminum chips easily enter the notch and the radial air duct during turning, are difficult to clean, damage insulation between rotor sheets, increase rotor loss and influence the reliable operation of the motor. At present, the air gap punching process of the copper bar rotor of the high-voltage motor is finished by adopting a lamination mode or a high-speed progressive punching mode of a small motor, the schemes are only process measures taken aiming at a special rotor and a large-batch motor, and the air gap punching process is also adopted for a conventional motor with multiple varieties and small batch.

Traditional cast aluminum mould has the poor and excessive problem of aluminium water of air discharge nature when the rotor is cast aluminium, and the poor cold shut that can lead to cast aluminium rotor of exhaust, broken strip scheduling problem produce, and direct influence cast aluminium rotor quality leads to the motor loss increase, and aluminium water is excessive can make aluminium parcel on the rotor surface, needs the car to fall to change the aluminium from the outside, owing to need the turning, can increase the rotor loss to lead to towards the crack technology failure.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the problem of how to improve the air discharge of cast aluminium mould and avoid the aluminium water excessive is solved.

In order to solve the technical problem, the technical scheme of the utility model a mantle mould in rotor cast aluminium is provided, a serial communication port, do the well mantle body that the nitridation was handled including the surface, the equipartition has many air discharge ducts of avoiding cast aluminium in-process aluminium liquid to spill over on the inner wall of well mantle body.

Preferably, the number of the exhaust grooves is equal to the number of the grooves of the rotor core.

Preferably, the inner diameter of the middle sleeve die body is D-D1 + K; d1 denotes the outer diameter of the rotor core 2; k is the depth of the exhaust groove.

Preferably, the depth of the exhaust groove is 0.08-0.1 mm.

Preferably, for the motor rotor with the machine base number below H225, the depth of the exhaust groove is 0.03-0.05 mm; for the motor rotor above H225, the depth of the exhaust groove is 0.08-0.1 mm.

Preferably, the material of the middle die set body is hot die steel H13.

The utility model provides a suitable material of cover mould in the selection to processing air discharge duct on well cover mould has improved the quality that the rotor was cast aluminium, and the product percent of pass reaches 98%, avoids spilling over of rotor surface aluminium water, has reduced the work load of rotor turning, establishes the basis for towards air gap technology, has cancelled turning rotor process, has improved production efficiency.

Drawings

FIG. 1 is a cross-sectional view of a front view of a cast aluminum die for an electric machine;

fig. 2 is a front view of a rotor cast aluminum middle cover die.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Example 1

As shown in fig. 1, the cast aluminum mold of the motor is composed of an upper mold 1, a rotor core 2, a middle mold 3, a dummy shaft 4 and a lower mold 5, the dummy shaft 4 is arranged in the rotor core 2, the middle mold 3 is arranged outside the rotor core 2, and the upper and lower ends of the rotor core 2 and the middle mold 3 are respectively connected with the upper mold 1 and the lower mold 5. When the rotor is used for casting aluminum, the aluminum casting speed is high due to high aluminum liquid temperature, and if the rotor cannot timely exhaust, the defects can be caused.

The utility model discloses a material processing process of well cover mould as follows:

after the middle cover die 3 is processed, the middle cover die is heated to 600-700 ℃, heat treatment is carried out until the surface hardness is about 40HRC, then nitriding treatment is carried out on the surface of the middle cover die body 31, after nitriding treatment, the hardness of the inner wall of the middle cover die body 31 reaches about 70HRC, heat resistance, wear resistance and corrosion resistance are enhanced, and gas in a rotor groove can be discharged during aluminum casting.

The utility model provides a pair of cover mould (be well cover mould 3) in rotor cast aluminium, as shown in fig. 2, it includes well cover mould body 31, in order to avoid the overflow of cast aluminium in-process aluminium liquid, well cover mould body 31 internal diameter process to be close rotor core 2 external diameter D1 size after, process out on well cover mould body 31 inner wall and rotor core 2 groove number equals, the degree of depth is 0.08 ~ 0.1 mm's air discharge duct 32. The middle cover die body 31 is made of hot die steel H13.

The inner diameter of the cast aluminum middle cover die 3 is as follows: d ═ D1+ K;

wherein: d1 denotes the outer diameter of the rotor core 2;

k is the depth of the vent groove 32: taking 0.03-0.05 mm of a motor rotor with the engine base number below H225; and for the motor rotor with the machine base number of more than H225, the thickness is 0.08-0.1 mm. In this example, K is 0.03 mm.

Example 2

In this embodiment, the utility model discloses a material processing procedure of well cover mould as follows:

after the middle cover die 3 is processed, the middle cover die is heated to 600-700 ℃, heat treatment is carried out until the surface hardness is about 38HRC, then nitriding treatment is carried out on the surface of the middle cover die body 31, after nitriding treatment, the hardness of the inner wall of the middle cover die body 31 reaches about 68HRC, heat resistance, wear resistance and corrosion resistance are enhanced, and gas in a rotor groove can be discharged during aluminum casting. K is 0.05 mm.

The rest is the same as in example 1.

Example 3

after the middle cover die 3 is processed, the middle cover die is heated to 600-700 ℃, heat treatment is carried out until the surface hardness is about 42HRC, then nitriding treatment is carried out on the surface of the middle cover die body 31, after nitriding treatment, the hardness of the inner wall of the middle cover die body 31 reaches about 72HRC, heat resistance, wear resistance and corrosion resistance are enhanced, and gas in a rotor groove can be discharged during aluminum casting. K is 0.08 mm.

The rest is the same as in example 1.

Example 3

In this example, K is 0.1 mm.

The rest is the same as in example 1.

Claims

1. The rotor aluminum casting middle cover die is characterized by comprising a middle cover die body (31) with the surface subjected to nitriding treatment, wherein a plurality of exhaust grooves (32) for avoiding aluminum liquid from overflowing in the aluminum casting process are uniformly distributed on the inner wall of the middle cover die body (31).

2. A rotor cast aluminum center die as recited in claim 1, wherein the number of said air discharge grooves (32) is equal to the number of grooves of the rotor core (2).

3. The rotor cast-aluminum middle sleeve die as claimed in claim 1, wherein the inner diameter of the middle sleeve die body (31) is D ═ D1+ K; d1 denotes the outer diameter of the rotor core 2; k is the depth of the exhaust groove (32).

4. A rotor cast aluminum center die as claimed in claim 1 or 3, wherein the depth of the air discharge groove (32) is 0.08 to 0.1 mm.

5. The rotor cast aluminum middle cover die as claimed in claim 4, characterized in that, for the motor rotor below a machine seat number H225, the depth of the exhaust groove (32) is 0.03-0.05 mm; for the motor rotor above H225, the depth of the exhaust groove (32) is 0.08-0.1 mm.

6. The rotor aluminum casting middle die set as claimed in claim 1, wherein the material of the middle die set body (31) is hot die steel H13.