Key points for the operation of electric fusion welding machine

1. Preparation of pipe fittings and pipes
Before electric fusion welding, ensure the quality of electric fusion pipe fittings and pipes. Check whether the specifications of pipe fittings meet the requirements, including pipe diameter, wall thickness, etc. The connection surface of pipes and pipe fittings should be clean, dry, and free of oil, dust and impurities. For PE pipes and pipe fittings, the surface oxide layer should also be removed, and the connection surface can be gently wiped with a special cleaning tool or sandpaper.
Insert the pipe into the fitting to the correct insertion depth. Generally, there will be a mark on the fitting to indicate the insertion depth. Insufficient or excessive insertion depth will affect the welding quality. Insufficient insertion depth may lead to insufficient connection strength, and excessive insertion may cause uneven material extrusion during welding.
2. Welding machine connection and parameter setting
Correctly connect the output line of the electric fusion welding machine to the terminal or socket of the electric fusion pipe fitting to ensure a firm connection and prevent looseness or poor contact during welding.
According to factors such as the model and specification of the electric fusion pipe fitting and the material of the pipe, set appropriate welding parameters such as welding voltage and welding time on the operation panel of the welding machine. These parameters are usually provided by the pipe fittings manufacturer. Strictly setting the parameters according to the manufacturer's requirements is the key to ensuring welding quality.
3. Welding process monitoring
During the welding process, closely observe the operating status of the welder. Pay attention to whether the output voltage and current of the welder are stable. If there is a large fluctuation in voltage or current, it may be caused by unstable power supply, welding machine failure or poor connection between pipe fittings and pipes. Welding should be stopped in time and the cause should be checked.
At the same time, some electric fusion welders are also equipped with temperature monitoring functions (directly or indirectly). If the temperature of the welding part is found to be abnormally high or rising too slowly, the welding process needs to be checked, such as checking whether the pipe fittings have quality problems or whether there are external factors interfering with the welding process.
4. Cooling and inspection after welding
After welding, let the welding part cool naturally. Do not apply external force or move the welding part to avoid affecting the welding quality. The cooling time depends on the specifications of the pipe fittings and the ambient temperature, and generally takes a few minutes to more than ten minutes.
After cooling, perform a visual inspection of the welding part. Check whether there are obvious defects in the welding part, such as pores, slag inclusions, and unfused parts. The welding quality can be preliminarily judged by the uniformity and flatness of the appearance. If any suspicious welding quality problems are found, non-destructive testing methods (such as ultrasonic testing, X-ray testing, etc., for application scenarios with higher requirements) can be used for further inspection.