A kind of manufacturing method of tension screw type laminated iron core

Abstract

The invention relates to a method for manufacturing a tension screw type laminated iron core, which comprises the following steps: step 1, stacking of punching sheets of the iron core and installationof tension screws: axially applying pressure on the punching sheets of the iron core by sections, and after the punching sheets of the iron core are stacked and pressed, preliminarily tightening fastening elements of the tension screws of the iron core in the compressed state; step 2, compaction processing: performing compaction processing on the iron core that is preliminarily tightened; step 3,when the iron core is at room temperature, tightening the tightening screws of the iron core subjected to compaction processing again; and step 4, spot welding for fixation: performing spot welding on the tension screws and the fastening elements thereof, so that the iron is fixed as one piece. Through the newly-added compaction processing, and re-tightening and then spot welding after the compaction processing, the iron core is formed as one piece to avoid the loosing of the laminated iron core loose, the laminated iron core is not easy to produce distortion and deformation, and ultimately the electrical performance of the motor is ensured and the working efficiency is improved.

Description

technical field [0001] The invention relates to a method for manufacturing a laminated iron core, in particular to a method for manufacturing a tension screw type laminated iron core. Background technique [0002] The types of laminated cores include: stator cores, rotor cores, pole cores, etc. Structurally, the laminated iron core includes at least one stack of iron core punching pieces, a set of axial fastening elements, and corresponding fasteners, locking devices and or spot welding fixing structures. [0003] The iron core is one of laminated iron cores. The iron core includes at least one set of laminations of iron core punching sheets, and a set of axial fastening elements, and the axial fastening elements are tension screws, and the fastening elements, locking devices and Or spot welding fixed structure. [0004] Corresponding to the type of laminated iron core, the corresponding iron core type includes: tensioned screw type stator core, tensioned screw type rotor...

AI Technical Summary

Problems solved by technology

[0013] During the operation of the motor, the compression degree of the conventional tightened screw type external press-fit stator core is easy to decrease, and even loosens, which increases the vibration of the conventional tension screw type external press-fit stator core. , and correspondingly increase the noise of the motor

Long-term operation of the motor will cause fatigue damage to the fasteners of the conventional tension screw type external press-fit stator core, and local heating of the conventional tension screw type external press-fit stator core will damage the conventional tension screw type. Insulation of the coils embedded in the outer press-fit stator core, thereby compromising the electrical performance of the motor

[0014] On the other hand, when the conventional tightened screw type outer press-fit stator core is laminated and formed according to the conventional tension screw type outer press-fit stator core manufacturing process, the tightened screw outer The stress generated by the stamping of the press-fit stator core during the stacking assembly process is not eliminated; at the same time, the stamping of the stamping of the screw-type outer press-fit stator core is produced during the stamping process in the previous process. Stress is not relieved

Therefore, when the conventional tension screw type external press-fit stator core is laminated and formed according to the conventional tension screw type external press-fit stator core, the conventional tension screw type external press-fit stator iron core The core is prone to distortion, deformation and other problems

As a result, it is difficult to embed the wire of the screw-type external press-fit stator core in the next process, and even damage the insulation of the embedded coil, and eventually damage the electrical performance of the motor

In addition, when tightening the screw-type external press-fit stator core sleeve stator frame in the next process, it is difficult to assemble, or even scrapped, which increases production costs

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