CNC Pipe Pile Cage Welding Machine
High-Efficiency Automated Cage Production: Fully automatic CNC control enables fast, continuous welding with 3–4× manual productivity while reducing labor and material consumption.
Stable Resistance Welding Quality: DC resistance welding delivers uniform, high-strength joints with ≤5% strength loss, ensuring reliable cage performance and minimal spatter.
Flexible Multi-Specification Capability: Compatible with square and round pipe piles and multiple bar sizes, supporting precise preset pitch and length for diverse production needs.
Machine Overview
The Pipe Pile Rebar Cage Welding Machine is a fully automated industrial system engineered for producing high-strength concrete pipe pile reinforcement cages. It combines high forming speed with minimal welding strength loss, a well-optimized mechanical structure, and convenient maintenance. Integrated variable-frequency control and an advanced human-machine interface enable stable, long-term high-speed operation while ensuring consistent, high-quality cage production.
Power System Options
Medium-frequency configuration:
Utilizes medium-frequency inverter technology to lower energy consumption by more than 30%. It delivers stable welding current and uniform weld quality, making it ideal for precision, high-volume pipe pile manufacturing.
Power-frequency configuration:
Equipped with a conventional industrial transformer featuring mature technology, reliable performance, and simple maintenance. This option offers strong cost efficiency for medium- and small-scale production.
Key Advantages
The machine supports both square and round pipe pile cages, allowing versatile production without requiring additional equipment investment.
Advanced resistance welding with DC heating provides rapid thermal response, strong and clean weld joints without spatter, and welding strength loss of no more than 5%, exceeding traditional welding performance.
Fully automated CNC control with PLC and variable-frequency regulation ensures accurate preset spiral pitch and cage length with minimal deviation.
High operational efficiency reduces labor and material consumption. Welding speeds reach up to 3000 mm/min — three to four times faster than manual processes. Spiral bars require no overlap, saving approximately 1.5% in material usage, and the system can be operated by a small crew.
Designed for durability and ease of use, the system features intelligent fault diagnostics, touchscreen operation, fast operator training, and reliable 24-hour continuous production capability.
The machine accommodates multiple rebar sizes, enabling processing of various longitudinal and ring bar diameters to meet comprehensive pipe pile production needs.
Typical Applications
Suitable for pipe pile manufacturers requiring standardized cage fabrication for precast square and round piles.
Used in infrastructure precast facilities producing reinforcement cages for bridges, railways, highways, ports, and marine foundations.
Applicable in building construction for residential, commercial, and industrial foundation piles.
Supports municipal engineering projects including road construction, underground utilities, and wastewater systems.
Ideal for professional piling contractors performing near-site cage prefabrication.
Also serves hydraulic engineering projects such as reservoirs, embankments, and river management structures.
This equipment provides an efficient and standardized solution for pipe pile reinforcement cage production in modern infrastructure prefabrication.
Machine Structure
The Pipe Pile Rebar Cage Welding Machine is primarily composed of a head assembly, tail frame, carriage system, steel bar support platform, and an electrical control cabinet, forming a coordinated structure for precise automated operation.
| Component | Description | Notes |
Steel bar support table | Holds steel bars | Fabricated locally |
Welding drum | Mounts copper rings of equal diameter | Must be insulated from frame |
Welding mechanism | Press-welds spiral bars onto main bars | — |
Wire feeder | Feeds spiral reinforcement | Avoid overloading feeder reel |
Machine base | Structural mounting frame | Must remain insulated from tail frame |
Carriage | Pulls and advances main bars | — |
Tail frame | Guide rail support for carriage | — |
Technical Parameters
| Item | Specification |
Cage diameter | Ø300 / Ø400 / Ø500 / Ø600 mm |
Cage length | 7–15 m (extendable to 45 m) |
Number of longitudinal bars | 6, 7, 10, or customized |
Longitudinal bar diameter | Ø7.1 / Ø9.0 / Ø10.7 mm |
Spiral bar diameter | Ø4–Ø6 mm |
Spiral pitch | 0–100 mm |
Traction speed | Max 7500 mm/min |
Drive power | 8.4 kW |
Welding power | 300 kVA |
Main rotation speed | 0–80 rpm |
Welding method | Resistance welding |
Control mode | Automatic |
Welding material | Steel with carbon content <0.20% |
Strength loss at weld | ≤5% |
Weld tensile/shear strength | ≥200 kg |
Transformer cooling | Air/self cooling |
Power supply | 380V ±5%, 50 Hz |
Ambient temperature | −5°C to +35°C |
Relative humidity | <85% |
Machine weight | ≈5 tons |



