stamping die on motor lamination influence

Influence Of Stamping Die On Motor Lamination

Welcome to the intricate world where precision meets power: the influence of stamping die on motor lamination. The influence of stamping die precision on motor lamination is pivotal, impacting the quality, production efficiency, and manufacturing costs of motor blanking.

As CNC equipment becomes ubiquitous, the demands on mold performance have surged. This shift necessitates meticulous attention to the design and manufacturing of molds to ensure optimal results.

The blog explores key factors, including optimal blanking clearances and heat treatment quality, directly impacting mold effectiveness. In a tech-driven landscape, grasping stamping dies’ nuanced impact on motor lamination is crucial for improved production.

What is Stamping Die?

At its core, the stamping die is a precision tool that shapes materials with accuracy and efficiency. Its purpose is to transform raw materials(such as electrical steel or silicon steel) into intricate lamination shapes, a crucial step in the manufacturing process.

Various stamping die types, such as progressive dies or compound dies, provide unique advantages in metal forming. The stamping process is a meticulous journey, starting with careful material selection and design considerations. Precision with the stamping die process ensures the production of high-quality motor laminations.

motor iron core stamping die

What is Motor Laminations?

Motor laminations are thin, insulated sheets of metal used in the construction of electric motors. Typically made from silicon steel, these stator and rotor laminations together to form the core of a motor, serving a crucial role in enhancing efficiency.

The precision demanded in these motor stators and rotors is achievable through stamping machines and stamping die.

By isolating individual laminations with insulation, motor laminations minimize these losses, improving the motor’s overall performance and energy efficiency.

This design also facilitates magnetic flux concentration, contributing to a more effective conversion of electrical energy to mechanical power in various applications, from household appliances to industrial machinery.

understanding electric motor lamination

Affect Of Stamping Die On Motor Lamination

The influence of stamping die on motor lamination is a critical aspect that significantly affects the performance and longevity of the motor. To achieve optimal results, one must carefully focus on designing and manufacturing the stamping die with careful attention.

Blanking Clearance

One key consideration is the rational selection of blanking clearance, which plays a pivotal role in extending the life of the mold. For silicon steel sheets with a thickness of 0.5 mm, a recommended clearance of 0.04 to 0.07 mm is suggested.

Drawing on both domestic and international data, it is advisable to slightly increase the clearance for the concave and convex dies to a range of 0.09 to 0.11 mm.

This adjustment serves to minimize friction between the plate and the concave and convex dies, simultaneously enhancing the quality of the plate section.

stamping die design and manufacture

Quality of Heat Treatment

The quality of the stator and rotor plate, produced by the punching die, is heavily reliant on the quality of heat treatment.

It is imperative to minimize material deformation during heat treatment and ensure that no surface decarburization layer is present, while carburized layers are strictly prohibited.

To enhance the working performance and overall service life of the mold, implement measures like nitriding, chrome plating, or laser surface hardening, considering the working conditions.

Additionally, one can employ shot peening treatment to further improve the durability of the stamping die.

Benefits Of Stamping Die On Motor Lamination Stacks

Here are some benefits of using stamping dies in the production of motor lamination stacks:

Precision and Accuracy:

Stamping dies allow for precise and accurate cutting of laminations. This precision is essential for maintaining consistent quality dimensions and tolerances across a large number of laminations, ensuring uniformity in the motor’s performance.

Cost-Effective Production:

Stamping dies contribute to cost-effective production due to their ability to mass production of precise laminations in a short production run time. The initial investment in tooling is offset by the efficiency and speed of the stamping process.

Material Efficiency:

Stamping processes optimize material usage by minimizing waste. Designing the dies and stamping press to maximize the number of usable laminations from a sheet of magnetic material actively reduces material costs and improves overall efficiency.

Reduce Losses:

The design of the stamping die can include features to minimize eddy current losses in the laminations. The die shapes and patterns control magnetic flux, minimizing energy losses in the motor.

Improved Magnetic Properties:

Stamping dies can be tailored to create specific shapes and orientations in the laminations, optimizing their magnetic fields. This leads to improved magnetic flux, better efficiency, and reduced hysteresis losses in the motor.

Lamnow Use Stamping Die Manufacture Quality Laminations

progressive stamping process

Lamnow, a leading motor lamination manufacturer in China, employs state-of-the-art stamping die technology to ensure the production of high-quality laminations.

Our precision-engineered stamping dies enable accurate and consistent cutting of silicon steel sheets, optimizing material usage and minimizing waste. This commitment to precision results in laminations with enhanced magnetic properties, reduced eddy current losses, and improved motor performance.

With a focus on efficiency, cost-effectiveness, and environmental sustainability, Lamnow delivers reliable solutions for various industries.


In conclusion, the intricate relationship between stamping die precision and motor lamination underscores the essence of meticulous design and manufacturing processes.

As highlighted, the rational selection of blanking clearances and the quality of heat treatment play pivotal roles in determining the efficiency, quality, and cost-effectiveness of motor blanking. In an era dominated by advanced CNC technologies, the significance of optimizing mold performance cannot be overstated.

A well-crafted stamping die not only ensures accurate cutting and stacking of laminations but also contributes to minimizing friction and energy losses in electric motors.


What are the key factors considered in stamping die design for motor laminations?

Factors include material selection, die material and hardness, die clearances, punch and die geometry, and tool maintenance. These aspects collectively impact the efficiency and effectiveness of the stamping process.

Which industries are stamping motor laminates suitable for?

Stamping motor laminates are suitable for a range of industries, including automotive, aerospace, and electric machinery manufacturing. These thin layer laminations are integral components in electric motors, generators, and transformers.

Their application ensures efficient energy conversion and is critical in various industries relying on electric and magnetic systems for optimal performance.

How does the precision of the stamping die impact the efficiency of motor lamination manufacturing?

A precise stamping die leads to accurate and uniform motor laminations, reducing waste and improving overall manufacturing efficiency. Tight tolerances are essential for meeting performance specifications.

What measures can be taken to enhance the lifespan of a stamping die used for motor laminations?

Regular maintenance, proper lubrication, and using high-quality materials for the die are essential for extending its lifespan. Additionally, monitoring and adjusting clearances can prevent premature wear.

Which are materials used in stamping motor laminations?

Stamping electric motor laminations commonly use electrical steel, prized for its magnetic properties. Additionally, materials like nickel and cobalt alloys are employed to enhance specific characteristics, such as corrosion resistance and temperature stability.  The amorphous metals offer very high permeability, a square hysteresis loop, and an oxide layer on the surface that provides electrical insulation for low eddy current losses.

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To learn more about our motor lamination manufacturing capabilities for your industry, contact our team today.