Method for manufacturing steel channel for ventilation of motor

Abstract

The invention belongs to the method for manufacturing a steel channel for ventilation of a motor, mainly relates to a method for manufacturing the steel channel for ventilation of the motor, and particularly relates to a method for manufacturing the steel channel for radial ventilation of a stator and a rotor iron core of the motor. The method comprises the following steps: drawing, namely, drawing raw wires by a four-roller die at normal temperature so as to obtain blanks with shapes similar to ventilation steel channel cross section shapes, wherein the four rollers surround to form a hole shape; rolling, namely, rolling at normal temperature by adopting a four-roller universal rolling mill, and processing the wires at four surfaces in rolling so as to obtain a finished product conforming to the cross section shape of the ventilation steel channel; and carrying out intermediate thermal treatment, namely, carrying out online expansion-type thermal treatment on the drawn or rolled semi-finished wire, softening the wire for the benefit of subsequent processing. According to the method, the four-roller dies and the four-roller universal rolling mill are adopted for machining the wires in four directions so as to guarantee the shape requirement and prevent wire torsion and bending. The online expansion mode is adopted for the intermediate thermal treatment so as to guarantee the thermal treatment quality requirement and wire straightness requirement. The problems of high production difficulty and multiple production defects for the existing cold rolling method are solved, so that the aims of improving the production efficiency, simplifying the production technology, reducing the production cost and enhancing the product quality are achieved.

Description

technical field [0001] The invention belongs to the technical field of channel steel processing, and mainly relates to a processing method of channel steel for motor ventilation. In particular, the invention relates to a processing method and a device for channel steel used for radial ventilation of motor stator and rotor iron core. Background technique [0002] When the motor runs at high speed, it will generate heat. If it is not ventilated and cooled, it will directly affect the service life and rated capacity of the motor. The known ventilation cooling method is to insert the ventilation channel steel into the coil slots of the motor stator and rotor for ventilation cooling. As an important part of heat dissipation, the ventilation channel steel plays an important role in the cooling of the stator and rotor. [0003] Most of the traditional channels for motor ventilation are processed by sawing with milling machines or punching, but the machining methods waste materials...

AI Technical Summary

Problems solved by technology

But it has the following disadvantages: (1) It is difficult to design the pass shape of the two-roll mill, and it is difficult to adjust the pass shape during rolling, and the requirements for the inlet and outlet guides of the rolling mill are strict

(2) At the beginning of the rolling of the two-roll mill, the rolled piece is forcibly cut in, making it difficult to bite in; during rolling, there is a large uneven deformation, which distorts the rolled piece and increases the difficulty of subsequent straightening

(3) During the rolling of the two-roll mill, it is difficult to seal tightly between the rolls, so that the deformation of the ventilation channel steel in the pass is insufficient, resulting in collapsed shoulders and lack of meat, which affect the cross-sectional shape of the finished product

[0007] The cold rolling method is currently an advanced processing method for channel steel used in motor ventilation, but it is difficult to produce during the rough rolling of the two-roll mill, and there are many defects

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