Brief description of the shot blasting interior of tubular bar anti roll

摘要

Method of manufacture of a tubular steel bar against the roll for auto and heavy weight includes a shot blasting inside of the prestress is characterized in that the prestressing shot-blasting of the inside of the bars to roll tubular steel is carried out with the aid of projectiles in zinc and / or aluminum and that it is not sought after shot blasting to remove all the grains and the zinc dust and / or aluminum, which have remained in the tube forming the bar. This process can be followed by a projection of oil to be siccative or a film of paint to the inside of the tube forming the bar, in order to trap the particles of zinc and / or aluminum, which have remained in the latter, and this before closing the ends of the arms of the bar to roll.