Precision Winding Technology for Ultra-Fine Enameled Wire | ZHPWT

In the fields of new energy vehicles, medical devices, and precision inductors for consumer electronics, the trend toward miniaturization and high performance has placed increasingly stringent demands on manufacturing processes. Among these, “0.02mm ultra-fine enameled wire winding” is a representative process in the current micrometer-level machining sector. When dealing with metal wires that are several times thinner than a human hair, traditional mechanical insulation stripping and tension control face significant challenges. Modern precision winding processes are driving the evolution of precision winding toward digital intelligent manufacturing by introducing technologies such as “0.02mm enameled wire laser stripping and stranding,” “dual-servo digital tension control,” and “MES management.”

0.02mm Magnet Wire Laser Stripping & Twisting

Dual-Servo Digital Tension Control & MES Integration

I. 0.02mm Enameled Wire Laser Stripping and Integrated Stranding

For 0.02mm (20-micron) enameled wire, both the bare copper diameter and the thickness of the insulating varnish layer are at the micron level. With low tensile strength, conventional mechanical contact can easily damage the wire.

• Laser Enamel Stripping: Traditional processes often rely on mechanical scrapers or chemical agents for enamel removal. Laser enamel stripping utilizes energy at a specific wavelength to instantly vaporize the polymer enamel layer, effectively reducing the risk of damage to the copper core while achieving higher process cleanliness.

• Precision Stranding: In electromagnetic components, multiple strands of fine wire are typically precision-stranded to minimize the high-frequency skin effect. By integrating laser varnish stripping with the stranding process, we have achieved a continuous production line operation spanning single-wire processing, precision stranding, and end-of-process varnish removal, which helps improve conduction rates and Welding reliability.

On-site view of a customer’s battery wire precision winding operation

II. Dual-Servo Digital Tension Control System

During the winding process, tension control is one of the key factors determining coil quality. Excessive tension can cause fine wires to stretch or break, while insufficient tension may result in loose coils and uneven wire arrangement.

The dual-servo digital tension system employs a more proactive control strategy:

• Active unwinding servo: Based on the rotational speed and acceleration of the winding spindle, it calculates and outputs the corresponding wire length in real time, reducing sudden tension fluctuations during start-up and stop.

• Feedback control servo: Working in conjunction with a high-precision micro-tension sensor, it forms a high-speed closed-loop control system to fine-tune tension in real time.

Through high-frequency sampling, the system can control tension fluctuations for 0.02mm wire within a narrow range and supports the configuration of tension process curves, effectively addressing the varying tension requirements during the winding of irregularly shaped coils.

III. MES Management and Full Lifecycle Data Traceability

Against the backdrop of smart factory development, the deep integration of MES (Manufacturing Execution System) provides robust data support for precision winding equipment.

• Automatic Dispatch of Process Parameters: Before production begins, the MES system automatically dispatches the process recipe for the batch of electromagnetic components (including laser power, stranding pitch, and servo tension curves for each stage) to the winding machine based on the production order, reducing the error rate caused by manual input.

• Online Monitoring of Core Parameters: During the winding process, the MES system collects and records the digital characteristics of each coil in real time, such as tension waveforms and laser energy monitoring. If data exceeds preset limits, the system promptly issues alerts and marks the product as defective.

• Closed-Loop Quality Traceability: Through the MES system, a data profile is established for every electromagnetic component shipped, enabling traceability back to the corresponding processing equipment, laser parameters, and winding tension curves, thereby meeting the compliance requirements for full product lifecycle traceability in high-end manufacturing.

The seamless integration of 0.02mm enameled wire laser stripping and stranding, dual-servo digital tension control, and the MES management system demonstrates the current state-of-the-art in precision winding for electromagnetic components. This not only addresses the processing challenges of “ultra-fine wires being prone to breakage and damage” but also drives the standardization and quantification of traditional processes through digitalization. 

About ZHPWT

Guangdong Zongheng Technology Co., Ltd. has dedicated 19 years to the R&D and intelligent manufacturing of precision winding machines for hollow coils, Alpha coils, voice coils, and similar components. Our equipment is widely utilized across various sectors, including smartphones, 3C electronics, new energy vehicles, home appliances, aerospace and defense, nuclear power, and marine engineering. For more details, Contact us: +86-186 2185 7689/Email:tech@zhpwt.com.