Technical requirements for 6061 aluminum flange lip welded structure?

According to the outer lip welding structure of the 6061 aluminum flange sealing surface, the leakage problem of the large diameter aluminum flange is fundamentally solved as follows:

1. Since the weld is a fillet weld, the weld angle is limited, so it can only withstand radial stress, but can not withstand axial stress, can only withstand shear stress, and can not withstand tensile stress and bending stress. Therefore, 6061 aluminum method Lan still needs to have sufficient strength and rigidity, so tighten the bolts first and then weld the lips.

2, in order to meet the space required for welding requirements. Without affecting the strength of the aluminum flange, the corresponding surface of the outer edge of the upper and lower aluminum flanges should be opened with appropriate groove; in order not to make the heat affected zone of the weld too large and improve this The weldability at the location, the lip edge is as thin as possible and thinner; in order not to cause thermal stress concentration in the weld, the lip edge should be smoothly transitioned with the aluminum flange body.

3, the welding angle size should not be too large, mainly to meet the continuous direction of the weld seam, as far as possible to select the low-group welding consumables, this is to remove the upper and lower aluminum flanges when the welding mouth is easy to use the grinding wheel to open.

4, 6061 aluminum flange lip welded structure can only be used for large-diameter aluminum flange connection, generally aluminum flange is not necessary. At the same time, the lower the removal rate of aluminum flange is required, the better, because the weld must be ground once removed Once dropped, too many welds can cause serious damage to the aluminum flange material.