Points to Consider When Choosing a Tube Rolling Machine

The following are the key points for selecting the model of high-frequency pipe welding machine, considering both process requirements and equipment parameters comprehensively:
1. Core parameter matching principle
Welding process compatibility: When using an IGBT solid-state high-frequency welding machine (frequency 300-450 kHz), the pipe material specifications need to match within the range of 8-76 mm outer diameter and 0.3-3 mm wall thickness. The welding speed error should be controlled within ±0.5%.
For stainless steel pipe welding, a 200-400 kHz high-frequency welding machine is preferred. The skin depth is controlled at 0.3 mm (applicable for 1.5 mm wall thickness), and the brazing temperature can be precisely controlled at 1100-1200℃.
Power and efficiency balance: Industrial-grade production lines are recommended with an installed capacity of 680 kW, supporting a 30-50 ton/hour cooling water circulation system, and the welding energy consumption should be ≤ 0.15 kWh/m (φ50 mm stainless steel pipe).
For home use or small factories, an 30-240A inverter welding machine can be selected, such as ZX7-315D, which supports 0.6 mm thin plate welding and has a load duration rate of 99.9%.
2. Key component selection suggestions
Induction system configuration: The error in the distance between the induction coil and the extrusion roller should be ≤ 3 cm. It should be combined with a 5-10 mm non-contact design (applicable for mirror surface stainless steel pipes), and the surface oxide layer thickness should be ≤ 5 μm.
Solid-state high-frequency welding machines need to integrate a switch rectifier cabinet, an inverter output cabinet, and a MOSFET bridge circuit to ensure an electrical energy conversion rate of ≥ 98%.
Automation control requirements: The Siemens S7-1500 PLC system is used to achieve the linkage of forming, welding, and cold rolling processes, and a laser diameter measuring instrument (with 2000 sampling per second) is equipped.
The servo shearing system uses PID algorithm to achieve ±1 mm fixed-length cutting, and the inertia compensation module improves efficiency.