In the face of different production needs, the requirements for the use of color coated coils are also different. Generally, the plates are welded according to the needs of customers and welded into different size states for use. The following precautions
need to be understood during welding. The quality of welding will directly affect the subsequent use effect of plates.
What are the key points of welding color coating?
1、 Turn on the appropriate power supply
Generally, the durable color coating coil adopts the power supply with vertical external characteristics, the positive polarity is adopted in DC, and
the welding wire is connected to the negative pole. It is generally suitable for the welding of thin plates of corresponding specifications, with the characteristics of beautiful weld formation and small welding deformation. The shielding gas used is
argon with very high purity. When the current and argon flow of welding color coating coil are, they should be within the specified range.
2、 Grasp the size
The length of the tungsten electrode protruding from the gas nozzle has a suitable
range, which should be understood first. There are size regulations in places with poor shielding such as fillet welding and deep grooving, and the distance from the nozzle to the work should also be controlled in the corresponding range. The arc length
of welding color coated coil, the corresponding distance should be mastered when welding ordinary steel and color coated coil with high welding quality. It is wrong to be too long or too short.
3、 Clean and control the temperature
to prevent the occurrence of welding pores, the welding parts of color coated coil must be cleaned if there is rust, oil stain, etc. In order to protect the welding pool well with argon to facilitate the welding operation, the tungsten electrode line
and the workpiece at the welding position shall generally maintain the specified angle, and the included angle between the filler wire and the workpiece surface shall be as small as possible, generally about zero degrees.
The above are the key points
of welding the color coating roll. At the same time, in order to prevent the back quality of the bottom weld bead from being affected by oxidation, it is necessary to use gas protection to protect the color coating roll. At the same time, in order to
avoid welding holes or bubbles when welding color coated coils, the corresponding rules and requirements should be strictly observed during welding.