Development Trend Of Precision Stamping Core Industry

Benefiting from the rapid development of the new energy vehicle industry, the demand for drive motors and their core components continues to increase, and the revenue of new energy vehicle drive motor Relay Iron Core has grown rapidly.

Stamping Iron Core Bending Part for EV Relay is a forming processing method that relies on punching machines and dies to apply external forces to plates, strips, pipes, and profiles to produce plastic deformation or separation, thereby obtaining stamping parts of the required shape and size. The precision stamping industry is the basic industry of the machinery manufacturing industry. The development level of the machinery manufacturing industry reflects the competitiveness of a country's manufacturing process technology. It covers automobiles, home appliances, agricultural machinery, engineering machinery, electronics and electrical, communications, rail transportation, aerospace, medical equipment, energy and chemical industry, and related equipment manufacturing industries, covering a very wide range.

After a decade of rapid growth from 2001 to 2010, my country's precision Stamping Core for the New Energy Relay industry has entered a slow and stable development stage, and is shifting from competition in scale and quantity to competition in high quality, high performance, multiple varieties, and high-cost performance. During the 13th Five-Year Plan period, my country's stamping industry enterprises have played a role in the technical characteristics of the market segments, and the product positioning of enterprises has become more professional and sophisticated. Products in some segments have reached the international advanced level.

The precision Pure Iron Core for the EV Relay industry is a sub-industry of the precision stamping industry. Precision stamping core products can be divided into motor cores and non-motor cores according to the application scenarios. With the expansion of the market scale of downstream application fields, the intensification of industry competition, the increasingly complex performance indicators of materials used, and the functional structure of products, the division of labor in the industry has gradually been refined. Downstream complete machine enterprises have gradually changed from the full-chain model of design, research and development, production, and marketing in the early stage of development to focus on design, research and development, marketing, etc., and outsourcing the production of the main components of the motor to professional production enterprises. In the motor industry, the core (including the stator core and the rotor core) is one of the important parts of the motor.

The material quality, thickness, size and precision, lamination coefficient, cleanliness, and other aspects of the iron core directly affect the energy conversion efficiency, power and NVH (noise, vibration, and acoustic roughness,) and other performance indicators of the motor, which not only affect the electrical and mechanical properties of the motor but also are related to the manufacturing cost of the motor. Therefore, the Pure Iron Core for AC Relay is one of the important links in motor manufacturing, and its quality will directly affect the performance and quality of the motor.

At present, the commonly used drive motors for new energy vehicles are mainly permanent magnet synchronous motors and AC asynchronous motors. Most new energy vehicles use permanent magnet synchronous motors, and representative car companies include BYD and Ideal Auto. Some vehicles use AC asynchronous motors, and representative car companies include Tesla and Mercedes-Benz.

From the process flow, the process flow of precision AC Relay Core and Copper Ring has several iterations. Initially, companies in the industry generally adopted a single-punch process with slow ordinary punch presses and single-station composite dies, which had low production efficiency and material utilization. To more effectively utilize silicon steel raw materials, improve production efficiency, and reduce product costs, companies in the industry gradually changed the stamping process and adopted a high-speed stamping process with high-speed punch presses and single-row multi-station progressive dies.

Since then, the high-speed stamping process has been innovated around improving production efficiency, reducing material consumption, and reducing the cost of subsequent processes, and has gradually realized the forming of DT4C Iron Core for Latching Relay mold internal buckle riveting and high-speed stamping of double-row and multi-row multi-station progressive molds. In recent years, the glue dispensing process has gradually developed, and some international companies have taken the lead in mass production. The specific implementation method is to set a glue dispensing station on the stamping progressive die. When the material strip passes through the glue dispensing station, glue is applied to the material strip through the glue supply nozzle, and the iron core punching sheets are fixed together by glue.