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Core loss at a certain frequency and magnetic induction intensity is a major indicator of electrical steel sheets. Core loss consists of two parts: hysteresis loss and eddy current loss. The hysteresis loss is the energy consumption caused by the alternating magnetization of the iron core, which is related to the composition of the material and the size of the product, and can be represented by the area of the hysteresis loop.

SINGLE SLOT NOTCHING

In general, there are not too many types of slots on the stator or rotor lamination, and each slot needs a specific tool to stamp. Even so, the overall cost of the tool is very low. The production time of the mold is only one to two days.

Now, the outer diameter of the largest punching sheet we produce is as high as 1250mm, and it's the largest width of silicon steel coil. during the operation of the motor, in order to offset the tooth harmonics , the slots of the stator core or rotor core are designed to be skewed, rotary notching is good for the production of this type of motor lamination, which is quite helpful for the design of large size motors.    

WORKING PRINCIPLE

At the single notching time, the tool only cuts one slot on the round sheet at one time, which means that the total number of cuts is equal to the number of slots on the lamination. All of our CNC single notching presses have a high precision position system and indexer, which can control every action of the machine and allows us to produce some not ordinary laminations.

APPLICATION & COST

Single notching is very helpful for low-to-medium volume production or prototype development, the tool cost of it is quite low. Its production speed is relatively slow, and the time to produce a lamination varies from a few seconds to tens of seconds. More than half of our CNC presses are equipped with automated production systems. These devices can greatly reduce production costs while ensuring production speed.

 

Many manufacturers of medium & large size motor lamination production are very appreciate us because the craft of single notching is one of our strengths.

https://www.hnyongrongglobal.com/stator-and-rotor-lamination-by-single-notching/