China has emerged as a global leader in manufacturing CNC PLC-controlled automatic 3/4 rolls bending machines, specializing in processing aluminium, PVC, and UPVC profiles with high precision. These machines are widely used in construction, automotive, and industrial fabrication due to their efficiency and versatility. Below is a comprehensive overview of their features, applications, and technological advantages:
1. Core Features of CNC 3/4 Rolls Bending Machines
- CNC & PLC Control: Equipped with advanced computer numerical control (CNC) and programmable logic controllers (PLC), these machines ensure repeatable accuracy (e.g., ±0.1mm tolerance) and user-friendly operation via touchscreen interfaces.
- Multi-Roll Design:
- 3-Roll Machines: Ideal for simpler bends and cost-effective production.
- 4-Roll Machines: Offer superior control for complex shapes (e.g., helical or conical bends) with dual-drive systems reducing material slippage.
- Material Compatibility: Engineered for aluminium alloys, PVC, UPVC, and thin-walled steel tubes, with adjustable roll pressures to prevent deformation.
- Hydraulic/Electric Hybrid Systems: Combine hydraulic power for heavy-duty bending (e.g., 40–100mm thick profiles) with electric actuators for energy efficiency.
2. Key Applications
- Construction: Bending aluminium/PVC profiles for curtain walls, window frames, and roofing systems.
- Automotive: Fabricating exhaust pipes, chassis components, and decorative trims.
- Industrial Piping: Creating seamless bends for HVAC ducts and plumbing systems (noted in models like YB-DYW-4 Electric Hydraulic Pipe Bender).
3. Technological Advancements
- Push Bending Function: High-end models (e.g., DW63CNCX4A-2SV) support mandrel-free bending for thin-walled tubes, minimizing cross-section distortion (as highlighted in Journal of Plasticity Engineering, 2019).
- Euro-Adapted Designs: Chinese manufacturers like Huaxi Machinery integrate European standards for durability, with laser-cut components and servo-driven feedback systems.
4. Leading Chinese Suppliers
- YONGBANG: Offers YB-SYW-4 series manual/hydraulic benders for pipes up to 4 inches.
- Huaxi Machinery: Specializes in 4-roll plate bending machines with CNC automation.
- King-Macc Machinery: Provides tube polishing and disk saw integration for end-to-end solutions.
5. Market Advantages
- Cost-Effectiveness: Competitive pricing (e.g., 20,000–20,000–50,000 for mid-range models) without compromising precision.
- Customization: Tailored for large-radius bends or high-volume production, with optional laser-guided alignment.
For inquiries, suppliers like FindChinatop and South Glass (for glass-bending hybrids) provide direct OEM/ODM services.
Note: Recent innovations include AI-assisted defect detection, as seen in 2025 models from Huaxi.
This article synthesizes technical data from manufacturers, academic journals, and industry catalogs to present a holistic view of China’s bending machine capabilities.
