In the motor industry, the stator and rotor core is one of the important parts of the motor, and its quality directly affects the technical performance of the motor.

A traditional method for manufacture an iron core is as follows: a single punch die is used for punching stator and rotor punching sheet (scattered sheets), and that iron core is manufactured through processes such as sorting the punching sheets, riveting with rivets, buckling sheets, argon arc welding, laser welding and the like; the iron core of an alternating-current motor rotor needs to be manually twisted to form a chute, and a stepper motor requires that the magnetic performance and the thickness direction of the iron core of the stator and rotor are uniform, The stator core and the rotor core laminations are required to rotate by a certain angle respectively, and if the stator core and the rotor core laminations are manufactured by a loose sheet die method, the efficiency is low, and the precision is difficult to meet the technical requirements.

Now, with the rapid development of high-speed stamping technology, high-speed stamping multi-position progressive die has been widely used to manufacture automatic laminating structure iron core in the fields of motor, electrical appliances and so on, in which the stator and rotor iron core can also be equipped with torsion laminating chute, large angle rotary laminating riveting structure between the laminations, etc. Compared with single stamping die, the multi-position progressive die has the advantages of high punching precision, high production efficiency, long service life, good consistency of the size precision of the punched iron core, easy realization of automation, suitability for mass production and the like.

The progressive die for automatic stacking and riveting of stator and rotor has high manufacturing precision, advanced structure, and rotary mechanism, counting and separating mechanism and safety mechanism with high technical requirements. The punching process steps of automatic stacking and riveting of iron core, inclined stacking and riveting of rotor with torsion, and large-angle rotary stacking and riveting are all completed on the blanking stations of stator and rotor laminations.

Yuma Precision continuously focuses on the research and development of progressive dies for motor cores. Our company has invested tens of millions of yuan to equip more than 20 sets of precision die processing equipment. At the same time, our company has experienced and skilled tooling design, tooling processing, tooling assembly, tooling debugging and tooling after-sales team, which can develop new tooling according to the needs of different customers and market feedback. Such as stepper/servo/brushless/new energy/automotive motor core mold and large rotary mold. We will continue to provide customers with motor core progressive tooling customization services.