Oval cage welding machine line 1. Rails (7500mm) and material shelf (7500mm) equipped and connected to the welding unit. The front end of the rail is adjustment-free. Good linearity can be achieved for wire cages. 2. Equipped with auto feeding unit, no restrictions on ring space. 3. Positioning mould manufactured with wire-cutting process, it features high accuracy, good insulation and long life. 4. Four air tanks, short air route inside the machine ensures quick response of the cylinder. 5. 25mm front plate resulted from one-time machining, firmly secure that the welding cylinders are on the same plane and perpendicular to the axes, thus the linearity of the cage can be ensured. 6. Air valves (Airtac) together with stroke-adjustable cylinders increase welding speed, pre-pressing only takes 0.08s. 7. Controlled by micro-computing unit. 8. Time-sharing power-on transformer reduces the burden on local electricity grid.