Quality standard of hook mesh all components should ensure that the material, the length of the component error tolerance is 1mm. Before the component is blanked, it is necessary to check whether it is straight or not, otherwise it should be straightened. Welding rod or welding wire should be selected suitable for the type of welding materials, and there should be factory certificate.
When welding, the member should be placed in the correct position. When welding, the welding joints between the components should be healthy, the weld should be full, the welding wave of the weld surface should be uniform, there should be no bite, not full welding, crack, remaining, welding tumor, burn through, arc scratch, arc pit and needle pores and other shortcomings, the welding area should not have spatter.
After completion of welding, welding slag should be knocked out. After welding and assembling the components, they should be properly polished with hand-held tools to make the appearance smooth and bright. Check the quality of the fence should be careful, the standard beyond the allowable error: the lack of weld length and width, width and thickness, line deviation, bending and other errors, should strictly control the relative orientation of the welding position standard, qualified rear quasi welding, welding heart operation.
Weld crack: in order to prevent crack attack, should choose the appropriate welding technical parameters and welding procedure, avoid small current, do not suddenly flout, weld joints should be lap 10~15mm, welding is not allowed to move, hit the weldment. Surface porosity: the welding position should be washed and cleaned. Select the appropriate welding current during the welding process to reduce the welding speed and make the gas in the molten pool completely escape.
Post time: 17-08-21