Calculation of tension acting on arbor in process of extruding aluminium alloy tube without lubrication;

The extrusion length is mainly determined by arbor strength when aluminium alloy tube is extruded without lubrication based on the calculation of arbor′s pulling force.

The failure reason of the aluminum alloy tube was investigated by macroscopic and microcosmic appearance observement,quality of material test,the stress analysis.

Based on the analyses of the marketable reguirement,it is important that development of producing and deepen working aluminium alloy tube to advensed the economy of Shanxi.

In regard to eddy-current test for aluminium alloy tube, it is the established threshold value that will determine the ploducts acceptable or unacceptable.