The technical measures for cold forging processing of aluminum alloy are mainly as follows

(1) The aluminum alloy is annealed before cold forging in order to reduce the cold forging force and improve the material plasticity. For hard aluminum alloy, the hardness after annealing is not the lower the better. Generally, the hardness of the billet should be HBS49~50 for positive extrusion and HBS46~50 for reverse extrusion.

(2) hard aluminum should be oxidation-saponification treatment before cold forging, the billet will be placed in 50 ℃ ~ 70 ℃ NaOH solution (NaOH 40g ~ 60g per liter of solution) for 1min ~ 3min, so that the surface to generate a layer of crystalline oxide film. Then in industrial soap or sodium stearate heated to 60 ℃ ~ 70 ℃ treatment 20min ~ 30min, followed by natural drying or drying. Pure aluminum and rust-proof aluminum in cold forging generally do not carry out this surface treatment.

(3) Aluminum alloy can use soybean oil or industrial vegetable oil to lubricate the die when cold forging, and industrial lard can also be used. With the development of lubricant, many companies now produce special lubricant for cold forging of aluminum alloy, which has better lubrication effect.