Introduction: New Opportunities Under Industry Transformation
Against the backdrop of global smart grid upgrades, large-scale 5G optical cable deployment, and aging transmission line renovation in 2026, preformed armor rods (PA Rods) have seen rapid growth in demand as a critical protection fitting for power transmission lines.
For power fitting manufacturers, traditional semi-automatic or manual production methods suffer from low efficiency, inconsistent quality, and lack of digital traceability, making them increasingly unsuitable for power utility tenders and international energy projects that follow IEC and IEEE standards. With over 20 years of experience in preformed fitting equipment, XINGANG MACHINERY has introduced a fully automatic production line solution that is becoming the industry standard for factory upgrading.
Watch the automatic preformed armor rods (PA Rods) production line in operation, including forming, end-rounding, marking and grouping processes.
1.Technical Principles and Application Value of Preformed Armor Rods (PA Rods)
Preformed armor rods are wrapped uniformly around conductors through a unique helical structure. Their primary function goes beyond physical protection and focuses on extending line service life:
Stress Distribution: Effectively relieves bending stress and vibration pressure at suspension points, preventing conductor deformation.
Anti-Vibration Fatigue: Suppresses aluminum strand fatigue fractures caused by aeolian vibration, a key requirement in aging line refurbishment projects.
Conductivity Restoration: When outer conductor damage ranges from 7% to 25%, armor rods can restore 100% of mechanical strength and electrical performance.
Armor rods produced using XINGANG MACHINERY equipment strictly follow color coding identification systems, with waterproof traceability labels for fast selection and accurate installation on-site.
2.Why a Fully Automatic Production Line Is Essential for Tender Qualification？
In today’s tendering environment, project owners focus not only on unit price but also on production stability and quality consistency:
Elimination of Human Error: PLC-controlled automation ensures consistent lay length and helix angle for uniform holding strength.
Full Traceability: Integrated online marking and automatic grouping provide digital traceability for each production batch.
Lower Total Cost: Despite initial investment, labor costs are reduced by up to 80% and scrap rate remains below 0.5%.
3.Core Equipment of XINGANG MACHINERY Automatic Solution
3.1 High-Speed Preformed Armor Rod Forming Machine
As the core unit of the entire line, this machine supports aluminum alloy wire, aluminum-clad steel wire, and galvanized steel wire.
High Precision: Length tolerance within ±2 mm, compliant with DL/T 763-2001.
High Efficiency: Maximum speed up to 1.5 m/s, suitable for 24/7 operation.
Intelligent Control: Siemens control system enables quick specification changeover.
3.2 Automatic End-Rounding Machine
Manual end grinding is inefficient and prone to burrs that may cause corona discharge. The automatic end-rounding machine applies induction heating and extrusion forming to produce smooth, rounded ends, improving electromagnetic compatibility in high-voltage applications.
3.3 Online Automatic Grouping and Marking System
This system integrates color marking, specification printing, barcode labeling, and automatic grouping, significantly improving site inspection and installation efficiency.
4.Core Equipment Parameters (Factory Setup Reference)
| Equipment | Processing Range | Key Advantage | Standard |
|---|
| Automatic Forming Machine | 1.67–10.3 mm | Modular design, 99.5% stability | IEC / DL-T |
| Automatic Bending Machine | 5.0–50.0 mm | Fast changeover, IP54 | All-weather |
| End-Rounding Machine | Full range | Smooth ends, no burrs | Corona-free |
| Synchronous Stranding Machine | 50–2500 mm | ±1° angle control | Mechanical strength |
5.Global Service Capability of XINGANG MACHINERY
As a national high-tech enterprise, XINGANG MACHINERY has supplied equipment to over 500 power projects worldwide.
Global Export: Equipment delivered to over 30 countries.
Turnkey Projects: Complete support from factory layout to installation and training.
6.Conclusion & Contact
Choosing XINGANG MACHINERY means selecting not only equipment, but also a long-term partner with 20 years of industry experience.
Contact Us
WhatsApp / WeChat: +86 15814626624
Email: info@xingangmachinery.com
Website: www.xingangmachinery.com
