Study on Welding Technology of Cooler in Dust Collecting Device

The dust collector cooler is mainly made of 10 mm thick support plate and φ18 mm×1.5 mm steel tube, and the materials are 06Cr19Ni10 stainless steel. The key point and difficulty of the cooler welding is that improper welding parameters or unappropriate operation mode easily causes the stainless steel tube burned through or the cooler support plate not welded through and so on due to thick support plate and thin pipe. The weldability of 06Cr19Ni10 stainless steel was analyzed. In order to guarantee weld penetration, the groove with 2×45° was designed at one side of the support plate. Clean the position to be welded and its surroundings thoroughly before welding. Firstly, spot welding positioning at the side of the groove was carried out, then adopt TIG welding with low line energy, that is small current, low voltage and no-swing. After welding, the leakage test of the welds was carried out. The results show that there is no leakage of the welds. The appearance of the welds is beautiful and the quality of the welds is up to standard.