Assembly method of split stator core and assembly tooling used

Abstract

The invention discloses an assembly method and assembly tooling of a segmented stator core, comprising: taking the outer cylindrical surface of the inner tube as the reference plane, placing the first iron core unit on the splicing platform, and positioning recesses on the outer surface of the iron core unit The slot fits and locates with the positioning piece on the top surface of the splicing table; other core units are sequentially spliced ​​through the connecting convex part and connecting concave part of the core unit to form a ring-shaped stator core; the stator core is tightened with a hoop; The laser pre-fixes the two ends of each welding seam by spot welding; the hoop divides each welding seam into upper and lower sections, and uses laser to perform spot welding on the upper and lower sections of each welding seam. The invention utilizes the inner tube and the hoop to splice the iron core unit, which can improve the welding deformation resistance, combined with the principle of symmetry, spot welding pre-fixation and spot welding seam, ensures the rounding accuracy of the stator core, improves the connection strength, and simultaneously spot welds a single point The energy output is low, the heat-affected zone of the core is small, and the deformation is small, which can ensure the smooth connection and tight fit of the inner water jacket and the stator core.

Description

technical field [0001] The invention is related to the motor manufacturing technology of new energy vehicles, in particular to an assembly method of a segmented stator core and a supporting assembly tooling. Background technique [0002] As a new type of environmentally friendly means of transportation, new energy vehicles have received more and more attention. Since they use motors to directly drive vehicles, they have higher requirements on the heat dissipation performance of the motors. In the motor, the main source of heat is the heat generated by the coil on the motor stator core during operation, so the heat dissipation of the motor is mainly carried away by the inner water jacket attached to the outer surface of the iron core. It can be seen that the smooth assembly and full fit of the stator core and the inner water jacket play a vital role in the heat dissipation of the motor, which requires the stator core to have a very high rounding quality, that is to say, the i...

AI Technical Summary

Problems solved by technology

Since argon arc welding will generate a lot of heat during welding, the residual stress of the stator core after welding is relatively large, which will cause serious deformation of the iron core and cannot meet the high precision requirements of the cylindricity dimension after forming

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