Common Problem
In the process of construction, it is inevitable to encounter the welding of large, thick-walled workpieces, alloy steel, aluminum alloy, etc., because the thickness of the weldment is relatively large, so in order to generate cold cracks, improve the welding effect of the weldment, Before welding, we should preheat before welding.
Preheating principle before welding:
Preheating before welding is a process measure that properly heats the part and the whole of the weldment before welding. Its purpose is to reduce the cooling rate of welded joints, avoid hardened structure and reduce welding stress and deformation. It is an effective method to prevent welding cracks.
Method:
Common pre-weld preheating methods mainly include flame heating, furnace heating, infrared heating, resistance heating lamps and electromagnetic induction heating. The traditional heating method is based on the heating method, heating efficiency, life maintenance, and heating characteristics. , the work efficiency is not as good as electromagnetic induction heating. (See the article "Advantages and Equipment Advantages of Intermediate Frequency Heating Equipment Compared with Other Heating Methods")
Machine:
At present, the all-digital medium and high frequency induction heating equipment developed by POLARIS-ETeK adopts PLC and IGBT inverter technology, and is committed to providing customers with one-stop induction heating solutions.
Case:
Preheating and Hydrogen Removal of Circumferential Butt Welding of Cylinder
Pre-Welding Preheating for Offshore Wind Turbine Body Prefab (Built-in Induction Heater)