Hyundai Rotem Unveils First 'Laminated Press' for Electric Vehicle Motor Cores

High-Speed?High-Precision Stacking Press Self-Development
Diversification of High-Speed Press Lineup
Introducing High-Speed Battery Can Press for Secondary Battery Market Demand Response

Hyundai Rotem is responding to the future electric vehicle production equipment market.

Hyundai Rotem announced on the 13th that it held a demonstration of the high-speed press called the 'stacking press' at the Hyundai Rotem Dangjin Plant located in Dangjin-si, Chungnam, on the 12th. On that day, 12 customers and related companies attended the demonstration to observe the operation process of the stacking press.

At the 'Laminated Press' demonstration held on the 12th at Hyundai Rotem's Dangjin plant, attendees are seen inspecting the laminated press equipment (right) and the high-speed battery can press line (left).
[Photo by Hyundai Rotem]

A press is equipment that applies force to metal to shape it into the desired form. It is mainly used to form automobile bodies and various parts, and is classified into mechanical presses, hydraulic presses, and servo presses depending on the structure that generates compressive force.

The stacking press, developed independently by Hyundai Rotem, corresponds to a high-speed, high-precision mechanical press and is equipment that produces high-efficiency motor cores applied to electric vehicles. The electric vehicle motor generates rotational force that moves the electric vehicle, similar to an engine in a conventional internal combustion engine vehicle. Among these, the motor core is a component responsible for the power of the electric vehicle motor and is a key part that determines driving range and acceleration performance.

The stacking press produces motor cores by layering thin steel sheets. The thinner the steel sheets, the more the motor's efficiency improves. Maintaining high precision while producing at high speed is the core technology of the equipment developed by Hyundai Rotem.

Hyundai Rotem's stacking press is equipped with a dynamic balance device that balances the equipment, securing high precision even in high-speed processes of up to 300 SPM (Stroke Per Minute). Additionally, the frame uses a cast material that absorbs vibration, minimizing equipment vibration compared to general welded frames.

Furthermore, Hyundai Rotem applied a '4-point slide structure' to the stacking press to ensure high quality. This can be applied to large-size molds with increased process counts compared to the existing 2-point slide structure.

Hyundai Rotem expects that through the localization of this stacking press, it will be able to deliver faster than overseas competitors and receive high evaluations in terms of after-sales service response.

In addition, by expanding the press lineup, Hyundai Rotem is enhancing its business capabilities to realize smart factories in the future complete vehicle industry.

On the same day, Hyundai Rotem also showcased the cupping press, a high-speed press for battery cans. The battery can high-speed press produces not only various cans such as beverage cans but also cylindrical secondary battery 'cans' for electric vehicles. Cylindrical batteries are easy to mass-produce and have lower cost burdens than prismatic or pouch batteries, making them a key component expected to see greatly increased demand in the complete vehicle industry recently. Hyundai Rotem's cupping press can form up to 200 strokes per minute.

A Hyundai Rotem official said, "The development of this stacking press equipment was possible thanks to various press technologies we already possess, including mechanical, hydraulic, and servo presses," adding, "We will secure a press product lineup optimized for industry demand such as electric vehicle motors and battery-related parts to strengthen our market competitiveness."