The welding process of fin tube is controlled by PLC program, the spindle motor and trolley motor are controlled by frequency conversion, the pitch is controlled by microcomputer, the resolution is 0.1mm, and the start-stop, sizing and automatic unloading of program-controlled welding are adopted. After the end of welding, the welding power supply high voltage can be stopped slowly as required. The welding transformer and welding contact head are moved by pneumatic system, and can be automatically repositioned and reset. The driving car can return quickly and automatically reduce the speed and return to the position. The workpiece clamping and supporting adopt pneumatic system, and can automatically support the finned tube. Break the belt, no belt, chuck loose automatic stop protection. The gear cutting machine can cut on the fin, and the width of the steel belt can be cut: 15 ~ 40mm; Thickness of steel strip: ≤1.5mm; Depth of cutting teeth: 10 ~ 20mm; Tooth distance: 4.5, 8mm; Tooth shape: V shape.

The welding equipment performance parameters and main performance indexes of high-frequency welding spiral finned tube (also known as finned tube or finned tube) are shown in the following table. The products meet the requirements of HG/T3181 "High Frequency Resistance Welding Spiral Finned Tube" and JB/T6512 "Manufacturing Technical Conditions of Spiral Finned Tube with High Frequency Resistance Welding for Boiler".

Performance parameters of spiral finned tube welding equipment

Project performance parameters

Welding power supply (W) 300

Maximum spindle speed (RPM) 300

Weldable steel pipe diameter (mm) Φ 25 ~ Φ 168

Thickness of weldable steel tube (mm) 2 ~ 10

Length of weldable steel tube (m) 0.5 ~ 25

Weldable fin width (mm) 13 ~ 30

Weldable fin thickness (mm) 0.8 ~ 2.5

Fin spacing (mm) 4 ~ 90

Open tooth pitch (mm) 4.5 ~ 8.0

Welding line speed (m/min) 35

The helix rotates to left and right

Weldable material carbon steel, low carbon steel, stainless steel