Process for manufacturing straight-bar stator cores

Abstract

The invention discloses a process for manufacturing straight-bar stator cores. The process comprises the following steps of stamping a bar material into required stamped plates by using a progressive stamping die, and simultaneously welding the stamped plates into an iron core with certain thickness through laser in the die; welding the rest soldering points on the exterior of the die; finally forming the required products. Pre-welding is realized in the stamping die for the first time, and procedures are effectively reduced; in the stamping procedure, a welding groove gap of the (N+1)th plate is particularly stamped, so that the size of the welding groove of the plate is greater than the size of a welding groove of a conventional stator single plate, and the (N+1)th plate cannot be welded in the welding process in the die, so that stator cores welded in the die can be easily separated from each other, setting on laser welding equipment is not required, the welding yield is greatly improved and the cost is reduced.

Description

technical field [0001] The invention relates to a manufacturing process of a straight stator iron core. Background technique [0002] At present, most of the stator cores of automobile generators are generally formed by winding. The shape of the stator core is mostly circular before winding, but it is difficult to wind the wire on the circular stator core. The time is long, the slot full rate is low, the waste of copper wire is large, and the production efficiency is low. Therefore, part of the stator core is strip-shaped. The strip-shaped means that the stator core is strip-shaped before the winding is completed. The difficulty of winding wires on the bar-shaped stator core groove is reduced, and the production efficiency is high. After the winding is completed, the bar-shaped stator core is bent into a cylindrical shape. Such as figure 1 As shown, it is a schematic diagram of a strip-shaped stator core through automatic riveting in the prior art. The disadvantage of u...

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Problems solved by technology

The disadvantage of using automatic riveting is that there are multiple self-riveting points on the product, and the tooth or yoke with riveting points will affect the magnetic flux; there is also a method of welding the stator core outside the mold. The disadvantage is that because it is a straight piece, Manual or mechanical methods are required for finishing after welding, which requires more procedures and processing costs

[0003] Another: The conventional welding method is usually to set a predetermined number of welding pauses once by programming the laser welding equipment, so as to separate each formed stator core. Due to the high welding speed, there will be unwelded or multiple welds. Therefore, the defective rate of this welded stator core is relatively high

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