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Ear Curling Machine
  • Ear Curling Machine
  • Ear Curling Machine

Ear Curling Machine

This ear curling machine is essential for the automotive leaf spring industry, capable of efficiently processing flat curling/wrapping, center curling/wrapping, and bracket ear production.
The machine offers exceptional processing versatility, handling plate thicknesses up to 25mm and widths up to 120mm, while maintaining a tight inner diameter tolerance of 0.3mm across a range of Φ25—Φ130mm.
Utilizing a one-time downward curling formation process, the equipment achieves a production rate of 3–5 heads per minute and is engineered for continuous 24/7 operation across three daily shifts with a total power rating of 30KW.
Equipped with a Siemens PLC and a touch-screen interface, the system supports automated parameter input and comprehensive data collection, integrating premium components such as AirTAC pneumatics and Huade hydraulic valves for superior operational stability.


Equipment technical parameters

1. Steel plate thickness  ≤ 25mm
2. Maximum board width  120 mm
3. Inner diameter of rolled ear Φ 25 — Φ 130 mm
4. Ear inner diameter mm Φ 50 — Φ 160 
5. Ear inner diameter/ear plate thickness > 1.2 5
6. The distance between the centers of the two ears is  850-2000 mm (central positioning).
300 — 2200 mm (end positioning)
7. The tolerance for the center distance between the two ears is ±1.5 mm .
8. The inner diameter tolerance of the rolled ear is 0.3 mm .
9. Processed varieties include  flat rolled ear, flat wrapped ear, center rolled ear, and center wrapped ear.
10. The ear-rolling method involves rolling the ear in one go.
11. Production efficiency 3-5 heads/minute
12. The required heating temperature for leaf springs is 975±25℃.
13. Arrangement left-cut, right-roll
14. Total power 30KW


Equipment Uses
This machine is used to produce flat rolled ears, flat wrapped ears, center rolled ears, and center wrapped ears at the ends of automotive leaf springs. The equipment is highly rigid and capable, and can be used for bracket rolled ear production with high efficiency.


Equipment composition: one set
One set of ear-rolling main unit, one set of head-cutting main unit, hydraulic system and electrical control system, etc.


Other technical requirements for equipment
The control cabinet is equipped with an exhaust fan and an electricity meter with a data output communication port for convenient data acquisition and management. It is designed with information modules for production operation, fault alarm feedback, maintenance and other functions.
The equipment allows users to input product parameters via a touchscreen, and the control system automatically sets the equipment's operation.
The equipment is capable of continuous operation, allowing for three shifts of production per day;
The PLC uses Siemens products;
The main electrical control components are Chint products;
The pneumatic components are from airTAC.
The main hydraulic valves are products of Beijing Huade Technology.
Equipment color: Paint according to the equipment color swatch provided by the customer or use RAL6011 (fruit green).


Equipment environmental requirements
Compressed air source: pressure ≥ 0.5 MPa;
Power supply: Three-phase four-wire: AC380V, 50Hz;
Factory ambient temperature: 10～50℃. It also has good ventilation and a relative humidity of 40-75%.
The cooling water temperature of the hydraulic system shall not exceed 35℃.


Equipment technical data

1. Plan view, foundation map                                   1 copy
2. Electrical schematic diagram, wiring diagram, hydraulic schematic diagram         1 copy
3. Operating instructions (must include lubrication diagram, maintenance guidelines, and layout diagram)         1 copy
4. Consumable parts diagram (consumable parts list)            1 copy
5. List of purchased parts and instruction manuals for major purchased components                   1 copy



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About Us
Wuxi Weineng Automation Technology Co., Ltd.
Wuxi Weineng CNC Technology Co., Ltd., located in Wuxi, the Pearl of Taihu Lake, covers an area of ​​6,000 square meters and currently employs over 60 people. In 2016, the company's founding team began researching and developing complete sets of equipment for automotive leaf springs, hot-coiled springs, and stabilizer bars. To date, they have been deeply involved in this industry for 10 years and are recognized as a specialized, innovative, and distinctive enterprise in this field by the Ministry of Industry and Information Technology.
The company integrates R&D, production, sales, and service. Its main products include complete sets of automotive leaf spring equipment and stabilizer bar equipment, including stabilizer bar end induction heating equipment, stabilizer bar thermoforming induction heating equipment, hollow stabilizer bar double-end induction heating equipment, hollow bar resistance conduction heating production lines, stabilizer bar secondary vulcanization production lines, and hot-coiled spring equipment. The company also provides users with complete induction heating automated production lines.
Over the years, the company has served leading domestic enterprises such as Shanghai China Spring Manufacturing Co., Ltd., Huawei Technology Co., Ltd., Zhejiang Meili Technology Co., Ltd., Zhejiang Jinsheng Auto Parts Co., Ltd., Chengdu ThyssenKrupp Fawer Spring Co., Ltd., Pinghu ThyssenKrupp (Pinghu) Automotive Stabilizer Bar Co., Ltd., and Liaoyang ThyssenKrupp Fawer Spring Co., Ltd., earning high praise for its products and services. Furthermore, the company has exported its equipment to countries such as Turkey, South Korea, India, Brazil, Egypt, Dubai, Iran, Africa, Tunisia and Morocco. "Professionalism, precision, innovation, and integrity" are the development concepts that the company has always adhered to. While continuously strengthening its own scientific research capabilities, it has formed stable industry-university-research cooperation with many universities. It has been repeatedly rated as a high-tech enterprise and a specialized and innovative enterprise. In the future, the company will continue to deepen its research and development in the automotive leaf spring, automotive guide arm, automotive stabilizer bar and spring industry equipment, provide the spring industry with more professional, intelligent and sophisticated equipment products, and contribute to the high-quality development of the global automotive leaf spring, automotive stabilizer bar and hot-coil spring industries.

News

  • Company News Apr. 01. 2026

    The Specialized, Sophisticated, Innovative and Unique Benchmark in the Field of Automotive Spring Equipment

    With a professional and focused attitude, Wuxi Wei Neng NC Technology Co., Ltd. has created a legendary story of being specialized, sophisticated, innovative and unique in the field of automotive leaf spring, stabilizer bar and spring equipment.As a comprehensive enterprise integrating R&D, production, sales and service, Wuxi Wei Neng NC Technology Co., Ltd. has built a full industry chain product portfolio. It provides a complete range of products, including complete sets of equipment for automotive leaf springs and stabilizer bars, stabilizer bar end induction heating equipment, hot forming heating equipment, hollow bar resistance conduction heating production lines, secondary vulcanization production lines, and complete sets of hot coil spring equipment. The company can also customize complete sets of automatic induction heating production lines to offer customers one-stop solutions.
  • Company News Apr. 01. 2026

    The Technology Leader in Automotive Spring Automation Equipment

    On the precise track of auto parts manufacturing, induction heating and automatic forming technologies are the core keys to determining product quality and production efficiency. With 10 years of technological accumulation and innovative breakthroughs, Wuxi Wei Neng NC Technology Co., Ltd. has become a technology leader in the field of complete sets of equipment for automotive leaf springs, stabilizer bars and hot coil springs, injecting strong momentum into automotive spring manufacturing with cutting-edge technology.Having deeply rooted in the industry for a decade, Wuxi Wei Neng NC Technology Co., Ltd. fully understands the process pain points and technical demands of automotive spring manufacturing, and has created an industry-leading full-range product portfolio. Its core products cover three major fields: complete sets of equipment for automotive leaf springs, complete sets of equipment for automotive stabilizer bars, and complete sets of equipment for hot coil springs. Each type of product embodies the R&D wisdom and craftsmanship of the team.
  • Industry News Apr. 01. 2026

    Core Driving Forces Behind Technological Upgrades of Automotive Spring Equipment

    Technological upgrades of current automotive spring equipment are mainly driven by the in-depth transformation of the automotive industry toward electrification, lightweighting and intelligence, as well as the industry’s higher requirements for production efficiency, product quality and environmental protection. The superposition of multiple driving forces promotes continuous breakthroughs in equipment technology.With the rising penetration rate of new energy vehicles, the increased weight of batteries has driven a rapid surge in demand for suspension springs with larger diameters and higher strength. Traditional spring production equipment can hardly meet the requirements of durability and quality uniformity under high-load conditions. Meanwhile, the pursuit of longer cruising range in new energy vehicles has spurred a sharp demand for spring lightweighting. The application of new materials such as magnesium-aluminum alloys and composite materials has forced technological upgrades of spring equipment to adapt to the processing requirements of new materials. In addition, the popularization of 800V high-voltage platforms has raised higher requirements for springs in terms of signal compatibility and corrosion resistance, further driving spring equipment toward precision and customization.
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    Future Development Trends of Automotive Spring Equipment Technology

    Combined with the development trend of the automotive industry and technological innovation, future automotive spring equipment will further focus on precision, intelligence, flexibility and green development, while moving toward the direction of whole-industrial-chain collaboration and customized R&D. Specifically, it will present four major trends. First, continuous improvement of precision. As advanced autonomous driving imposes higher requirements on vehicle dynamic control accuracy, the manufacturing tolerance standards for springs will be further tightened. Future spring equipment will focus on optimizing precision control technology to achieve higher-precision dimensional control and mechanical performance regulation, while enhancing equipment stability and reliability to meet the production needs of high-end automotive springs. Second, in-depth integration of intelligence and informatization. Future spring equipment will further integrate technologies such as the Internet of Things, big data and artificial intelligence to realize full-process intelligent control of production. By collecting real-time production data, it will optimize process parameters, predict equipment failures, and improve production efficiency and product quality. At the same time, the equipment will realize informatized linkage with upstream and downstream production links, build a production system featuring whole-industrial-chain collaboration, and achieve integrated management from raw material procurement to finished product delivery.
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