In the fields of modern industry and construction, square and rectangular pipes have become indispensable basic materials due to their excellent bending and torsion resistance and convenient connection characteristics. As the core equipment for square tube production, High-Frequency Welding square Tube Roll Forming Machine is continuously empowering the pipe manufacturing industry with its efficient, intelligent, and precise performance. We are committed to providing industry-leading square tube production line solutions, helping you easily handle the entire process from steel strips to high-quality square tubes.

Equipment Flow Overview：

The entire production line boasts a compact layout and a high degree of automation, with key processes interconnected:

1.Uncoiling and Material Preparation:
Steel strip coils are loaded onto the uncoiler by a feeding trolley. After being guided by a shovel and leveled, they are prepared for precise forming. To ensure continuous production, a shearing and welding machine and a horizontal spiral looper are typically included, allowing for continuous strip connection without shutting down the machine.

2.Cold Bending Forming:
The straight steel strip enters the forming unit. Through the alternating action of multiple horizontal and vertical rollers, the steel strip is gradually bent into an open circular tube blank. The forming passes and roller pattern design are optimized for the characteristics of square tubes, ensuring uniform edge deformation and laying the foundation for precise welding.

3.High-Frequency Welding:
The tube blank enters the welding unit. A solid-state high-frequency welder rapidly heats the edges of the tube blank to a molten state through induction or contact. It is then forcefully pressed together by extrusion rollers to form a strong straight seam. Internal and external burrs are removed online in real time, ensuring a smooth and aesthetically pleasing weld with strength close to that of the base material.

4.Cooling and Sizing:
The high-temperature welded pipes are rapidly cooled by a water-cooling system before entering the sizing unit. Through multiple precision sizing horizontal and vertical rollers, the pipes are progressively shaped into standard square or rectangular cross-sections, with precise control over dimensional tolerances, flatness, right angles, and surface quality.

5.Cutting and Collection:
A fixed-length flying saw or computer-controlled flying saw automatically tracks the production line speed, cutting the pipes to the required lengths online. The finished pipes are then conveyed via roller conveyors to a packaging and collection rack, completing the entire production process.

Diverse Application Scenarios：

• Construction and Infrastructure:
Steel structures, space frames, curtain wall framing, bridge railings, stair handrails, municipal fencing and columns, etc., requiring high load-bearing capacity and excellent corrosion resistance.

• Automotive and Transportation:
Vehicle chassis frames, beams, carriage frames, seat tubes, drive shaft sleeves, and rail transit supporting facilities, requiring precise dimensions, lightweight, and high strength.

• Machinery Manufacturing and Warehousing:
Automated equipment frames, conveyor rollers, rack uprights and beams, logistics turnover box frames, industrial platforms and escalator treads, etc.

Product Attributes:

Key Features：

1.High-Precision Forming and Dimensional Stability:
The rolls are made of high-quality alloy steel and undergo rigorous heat treatment. Combined with a computer-aided roll patterning system, this ensures excellent consistency in the side length, wall thickness, and radius (R-angle) of the square tubes. The sizing unit allows for flexible conversion from round to square tubes, resulting in regular and full profiles.

2.High-Efficiency and Reliable High-Frequency Welding:
Utilizing a new generation of solid-state high-frequency welding machines, the line features stable frequency, concentrated power, and a small heat-affected zone, achieving welding speeds of 20-120 m/min. The weld structure is dense, exhibiting excellent performance in flattening and flaring tests, significantly reducing cracking rates during production.

3.Intelligent Automated Control:
The entire line is centered around a PLC, with intuitive operation via a touchscreen human-machine interface. It enables one-click parameter recall, adaptive speed synchronization, closed-loop welding temperature adjustment, fault self-diagnosis, and remote maintenance, significantly reducing reliance on manual labor and improving yield.

4.Quick Changeover and Flexible Adaptation:
Through modular roll supports and a quick roll changer, the same line can quickly switch between producing square tubes, rectangular tubes, and even some open profiles of different specifications. Supports small-batch, multi-specification production, fully adapting to current market demands for customization.

5.Energy-saving, low-consumption, and long-life:
Optimized transmission structure and cooling water circuit, using high-efficiency energy-saving motors and low-loss high-frequency power supplies, resulting in a 10%~20% reduction in overall energy consumption compared to traditional models. Reinforced design of key components ensures equipment durability and stability, leading to significant long-term cost advantages.

Choose us and usher in a new era of square tube manufacturing：

Whether you’re planning to build a new production line or upgrade existing equipment, we can tailor the best solution for you. Welcome to inquire and explore the infinite possibilities of intelligent square tube manufacturing together.