How is copper wire drawn for electrical use?

Table of Contents

1. Introduction
2. Copper Wire Drawing Process
   • Raw Material Selection
   • Annealing Process
   • Wire Drawing Machines
   • Lubrication in Wire Drawing
   • Quality Control and Testing
3. Sanjin Company Solutions
4. References

Introduction

Copper wire is a fundamental component in electrical systems due to its excellent conductivity and malleability. The production of copper wire suitable for electrical use involves a series of complex processes, ensuring the final product meets the necessary standards for conductivity, strength, and diameter. This article details the process by which copper wire is drawn for electrical applications, including specific parameters and technologies employed.

Copper Wire Drawing Process

Raw Material Selection

The copper wire drawing process begins with the selection of high-purity copper, typically 99.9% pure. The preferred raw material is copper cathode, which provides a consistent quality essential for high-performance electrical applications.

Annealing Process

Annealing involves heating the copper to 370-450°C to reduce its hardness and improve ductility. This step is crucial as it allows the copper to be drawn into thinner wires without breaking.

Wire Drawing Machines

Copper wire is drawn using wire drawing machines comprising several dies that gradually reduce the diameter of the wire. Modern machines can draw wire with diameters ranging from 0.015 mm to 10 mm. The drawing speed can reach up to 3000 m/min, depending on the wire size.

Lubrication in Wire Drawing

Lubrication is vital in the wire drawing process to minimize friction and heat production. Oil-based or water-based lubricants are typically used, with parameters like viscosity and temperature being controlled to ensure optimum performance.

Quality Control and Testing

Post-drawing, the copper wire undergoes rigorous quality control procedures, including tests for tensile strength, elongation, and electrical resistance. These tests ensure that the wire meets international standards like ASTM B3 and IEC 60228.

Sanjin Company Solutions

Sanjin Company offers advanced solutions in the field of copper wire drawing, focusing on efficiency and quality enhancement. Their latest wire drawing machines integrate advanced control systems for monitoring wire diameter and temperature in real-time, ensuring high precision and consistency. Sanjin's comprehensive lubrication systems optimize friction reduction, further enhancing the longevity and reliability of the equipment.

References

• ASTM International. Standard Specification for Soft or Annealed Copper Wire (ASTM B3).
• IEC. International Electrotechnical Vocabulary – Fundamental concepts (IEC 60228).
• Wire Journal International. Advancements in Copper Wire Drawing Technology.
• Sanjin Company. Innovative Solutions for Wire Drawing Processes. Company Brochure.