Winding slot hole processing die set during motor stator core forming process

Abstract

The invention discloses a wire winding slot hole processing die set in the forming process of a motor stator core, which comprises a punching slot die, a b slot punching die and a c slot punching die which are sequentially arranged in the direction of strip material travel , the die for punching a slot includes several punches for punching a slot evenly arranged along the circumference, the die for punching b slot includes several punches for punching b slot evenly arranged along the circumference; several punches for punching a slot and several punches for punching b slot can be used Rotating along its arrangement center, several punches for punching a slots and punches for punching b slots successively punch the same area on the strip, and a number of a slots and a number of b slots evenly arranged along the same circumference are obtained on the strip, A number of a slots and a number of b slots cooperate one by one to form an axisymmetric distribution. The present invention can process a plurality of winding slots at one time through the cooperation of three punching hole dies, and can realize the processing of winding slots of various specifications by adjusting the rotation angle of two of the punching hole dies.

Description

technical field [0001] The invention relates to the technical field of motor iron core manufacturing, in particular to a die set for processing winding slot holes in the forming process of a motor stator iron core. Background technique [0002] The motor stator core includes winding slots, and the winding slots are not formed in one step during the forming process. It is necessary to process several winding slot holes uniformly distributed along the circumference on the iron core, and then punch the inner hole of the stator. Make a number of winding slots into winding slots with notches. In this process, the currently commonly used molds for processing the winding slots are several punches with the same outer profile as the inner profile of the winding slots. After cutting, several winding slots are formed. The disadvantage of this mold is that it can only process winding slots of one size and specification, that is, each piece of the stator core monolithic structure obtaine...

AI Technical Summary

Problems solved by technology

[0002] The motor stator core includes winding slots, and the winding slots are not formed in one step during the forming process. It is necessary to process several winding slot holes uniformly distributed along the circumference on the iron core, and then punch the inner hole of the stator. Make a number of winding slots into winding slots with notches. In this process, the currently commonly used molds for processing the winding slots are several punches with the same outer profile as the inner profile of the winding slots. After cutting, several winding slots are formed. The disadvantage of this mold is that it can only process winding slots of one size and specification, that is, each piece of the stator core monolithic structure obtained after stator blanking is In the same way, after lamination, it is the most common straight alveolar core

[0003] With the continuous development of the motor iron core manufacturing technology, the copper wire consumed by the winding slot of the straight tooth slot iron core under the same slot full rate condition is longer, and the production cost is higher. Therefore, as disclosed in the patent publication number CN 101523696A A disclosed laminated iron core came into being. This iron core has winding slots of various specifications. After stacking, multiple sets of steps are formed at the winding slots. The stator core of this structure has been verified by practice. Fewer copper wires are required for the same slot fullness rate, and the production cost is lower. However, the problem that follows is that due to the diversification of the specifications of the winding slots, the conventional winding slot hole processing molds are no longer suitable for this iron. Core, it is easy to think of setting up multiple sets of molds to process winding slots of various specifications, which is currently difficult to be adopted in terms of the design cost of the mold and the action space of the mold. , the patent disclosed by the patent publication number CN101523696A adopts the method of constantly changing the position of the mold group to make the concave-convex die stamp out winding slots of different sizes, but its manufacturing process has certain limitations, and it is only applicable to the separated stator iron core, that is, only one stator core block with continuously changing width of the winding groove can be processed. If the entire stator core needs to be processed, it is necessary to adjust the position of the concave and convex dies one by one to process multiple stator iron cores. The single core block, the single stator core block is wound and then spliced, the production efficiency is low, and the outer circle size of the stator core is prone to deviation after splicing multiple stator core single blocks

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