Punching and shearing is an important part of the motor manufacturing process. Compared with other processes, the manufacturing of motor laminations is a highly repetitive process. In particular, the traditional lamination manufacturing process can cause great mental fatigue to the operators due to the repetitive punching process, which increases the probability of safety accidents.
To avoid such problems, many motor manufacturers have added robotic arms for feeding and receiving materials. With the development of the times, robotic arms have gradually evolved from simple devices into professional, fully automatic intelligent mechanical devices.
Fully automated intelligent mechanical devices have become an optional feature for punching and shearing equipment manufacturers. These devices can perform multiple functions such as material grabbing, feeding, punching, material removal, and material unloading in one go. They represent a revolutionary integration of punching and shearing processes and equipment technologies, achieving a simultaneous improvement in efficiency, safety, and quality. Especially with rising labor costs, the combination of automation, intelligence, and high speed in equipment has become a necessity and a product of our time, liberating operators.
Brief introduction to silicon steel sheets
Silicon steel, commonly known as silicon steel sheet or silicon steel plate, is an indispensable low-carbon ferrosilicon soft magnetic alloy in the power, electronics, and military industries. It is also the most produced functional metal material, accounting for approximately 1% of global steel production. It is a ferrosilicon alloy containing 0.8%-4.8% silicon, produced through hot and cold rolling into thin silicon steel sheets with a thickness of less than 1 mm. The addition of silicon increases the resistivity and maximum permeability of iron, reduces coercivity, core loss, and magnetic aging, and it is mainly used as the core of various motors, generators, and transformers.
Classification of non-oriented silicon steel sheets
Based on the manufacturing process, cold-rolled sheets can be divided into two types: hot-rolled and cold-rolled. Cold-rolled sheets can be further divided into two types: non-oriented and grain-oriented. Cold-rolled sheets have uniform thickness, good surface quality, and high magnetic properties.
Silicon steel sheets can be divided into two types according to their silicon content: low-silicon and high-silicon. Low-silicon sheets contain less than 2.8% silicon and have a certain mechanical strength. They are mainly used in the manufacture of motors and are commonly known as motor silicon steel sheets. High-silicon sheets contain 2.8%-4.8% silicon and have good magnetic properties, but are more brittle. They are mainly used in the manufacture of transformer cores and are commonly known as transformer silicon steel sheets. In practical applications, there is no strict boundary between the two, and high-silicon sheets are often used to manufacture large motors.
Performance indicators of silicon steel sheets
● Iron loss. This is the most important indicator of silicon steel sheet quality. Grades are classified based on iron loss values; the lower the iron loss, the higher the grade and the higher the quality.
● Magnetic induction intensity. Silicon steel sheets that can achieve higher magnetic induction under the same magnetic field can be used to manufacture motor or transformer cores that are smaller in size and weight, thus saving on silicon steel sheets, copper wire, and insulation materials.
●Lamination factor. Silicon steel sheets have a smooth, flat surface and uniform thickness, resulting in a higher lamination factor for manufacturing iron cores.
● Stamping performance. This is even more important for manufacturing cores for small and micro motors.
● The surface has good adhesion and weldability to the insulating film, and can prevent corrosion and improve the stamping performance.
● Minimal magnetic aging phenomenon.
●Silicon steel sheets should be annealed and pickled before they can be put into use.
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