Problems with pressing in the flash of aluminum tubes

Flash indentation is an ear that appears along the longitudinal direction of the aluminum tube After processing, it is folded and pressed into the surface of the aluminum tube.

The flash is generally symmetrical and parallel to the longitudinal direction of the aluminum tube.

Flash intrusion destroys the continuity of the metal and is a very serious defect.

The reasons are too much feeding volume or unstable feeding, improper design and matching of tools.

The hole opening value is small, and the wide metal does not fill the space and will flow into the hole gap.

The hole type and the core do not match, a certain section of the metal is severely deformed during the rolling process, the metal is locally concentrated and pressed down, and the hole gap is too large, all of which may cause flash on the aluminum tube.

Preventive measures, methods to eliminate flash pressure,

The hole opening value should be checked frequently, the core head should be selected correctly, the feed amount should be adjusted, the hole spacing, hole misalignment and tube blank turning angle should be adjusted.