The steel cage rolling welding machine, a specialized piece of equipment used in the construction and precast concrete industries for automatically manufacturing cylindrical steel cages for columns, piles, bridge piers, and other structures, is receiving increasing attention. It plays a significant role in enhancing production efficiency, ensuring stable quality, reducing labor, and improving the structural integrity of reinforced concrete components by rolling and welding longitudinal and spiral steel bars into cage-like shapes and connecting them at precise intervals through automatic welding.
Working Principle
The operation of the steel cage rolling welding machine is based on a precise process.
Firstly, according to construction requirements, workers manually pass the main bars of the steel cage through the corresponding round holes of the fixed rotating plate and extend them into the holes of the mobile rotating plate for fixation.
Next, the end of the coiled bar (wound bar) is welded to one of the main bars.
Subsequently, the fixed and mobile rotating discs begin to rotate. During this process, the mobile disc rotates while simultaneously moving backward, winding the reinforcing bars around the main bars and welding them automatically.
Eventually, the finished steel cage is formed.
For example, in highway bridge pile foundation construction, this principle is used to efficiently produce large quantities of steel cages that meet design specifications.
From a technical perspective, the steel cage has strict requirements for the precision of stirrup spacing. This automated steel cage rolling welding machine allows the spacing parameters to be set and controlled via the PLC system. In fact, the spacing is determined by the rotational speed and traveling speed of the two discs. As long as these speeds remain stable, the spacing accuracy can be reliably ensured.
Equipment Features
Fast Processing Speed
Taking a typical construction scenario as an example: under normal circumstances, five operators per shift, working two shifts per day, can process over 20 finished steel cages of 12 meters each. This includes material preparation, roll welding, installation of reinforcing ribs, detection tubes, and guide pads. Compared with traditional manual production, overall efficiency is significantly improved.
Stable and Reliable Processing Quality
Due to CNC mechanized operations, the spacing between the main bars and winding bars is uniform, and the diameter of the steel cages remains consistent. The finished products fully comply with specification requirements. Previously, when steel cages were produced manually, supervisors needed to perform daily inspections on-site. With mechanized processing, inspections are largely unnecessary because quality consistency is guaranteed.
Convenient Lap Jointing of Steel Cages
Because the main bars are evenly distributed around the circumference, lap jointing multiple steel cages is easier and faster, reducing hoisting time and accelerating project progress.
Quality Control Guarantee
Mechanized processing makes quality control more scientific and standardized, minimizing the impact of human error.
Technical Parameters of Common Models
| Equipment Model | FH2000 | FH2200 |
| Applicable Pile Diameter (mm) | 500–2000 | 600–2500 |
| Standard Cage Length (m)* *Other lengths can be customized |
12, 18, 22, 27 | 12, 18, 22, 27 |
| Weight of Steel Cage (kg) | 6000 | 8000 |
| Main Reinforcement Diameter (mm) | Φ12 – Φ40 | Φ12 – Φ40 |
| Coil Diameter (mm) | Φ6 – Φ16 | Φ6 – Φ16 |
| Rib Spacing (mm) | 50 – 400 | 50 – 400 |
| Welding Method | CO₂ Shielded Welding | CO₂ Shielded Welding |
| Hydraulic Station Pressure (MPa) | 8 | 8 |
| Power Supply | 380V / 50Hz | 380V / 50Hz |
| Power (kW) | Max 23, Working 18 | Max 29, Working 23 |
In the future, steel cage roll welding machines will evolve toward a higher degree of intelligence and automation, further improving production efficiency and product quality while reducing labor costs. Meanwhile, as the construction industry's requirements for green and environmentally friendly practices continue to rise, the equipment will also be continuously optimized for energy conservation and related aspects. In terms of technological research and development, greater emphasis will be placed on enhancing the precision and stability of the equipment to meet the increasingly demanding requirements of engineering construction.