What is the function of the straight seam welding machine?

The straight seam Pipe Welding Machine is a specialized equipment used for manufacturing straight seam welded steel pipes. Its core function is to process steel strips into pipe materials through forming and welding processes. Here is a comprehensive analysis of its main functions and features:
1. Core Function
Forming Function:
Using multiple forming rollers, the steel strip is gradually curled into pipe blanks, which can produce round, square, rectangular, and various special-shaped steel pipes. The forming accuracy can reach ±0.1mm.
Welding Function:
It supports multiple welding processes such as high-frequency resistance welding (ERW), submerged arc welding (SAW), and argon arc welding (TIG/MIG). The welding speed can reach up to 120m/min (high-frequency welding) or 1.5m/min (submerged arc welding).
It adopts single-sided welding and double-sided forming technology, ensuring the quality of the welds both inside and outside through back protection gas or copper liners.
Automation Control:
Integrated with PLC or CNC systems, it enables full-process automation from loading to finished products. Some models are equipped with laser tracking and AI algorithms to real-time correct weld seam deviations (accuracy ±0.05mm).
2. Technical Features
Structural Design:
The cantilever-type main machine structure facilitates the loading and unloading of workpieces, and the piano-key type pneumatic clamping device ensures uniform force on the weld seam. The clamping force can be adjusted to accommodate different thickness materials.
The welding trolley is driven by a servo motor and is driven by a gear rack transmission, ensuring high walking stability.
Material Adaptability:
It can process various materials such as low-carbon steel, stainless steel, and aluminum alloy. The wall thickness range is 0.2-40mm, and the diameter covers φ32-1500mm.
Special models such as the NM600D wear-resistant pipe welding machine support welding of high-hardness materials (carbon equivalent ≤0.45%).
Quality Control:
It has built-in ultrasonic testing (UT) and weld seam detection modules, with a one-time pass rate of up to 99.3%.
The heat treatment unit (such as annealing furnace) eliminates welding stress and improves mechanical properties.
3. Application Advantages
High Efficiency: Compared to seamless pipe production, the cost of straight seam pipe production is reduced by 30%-50%, making it suitable for mass production.
Flexibility: By replacing molds, product specifications can be quickly switched, meeting customized requirements.
Environmental Friendliness: The closed welding station combined with a dust removal system improves the working environment.
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