A kind of isometric helix milling method of large-sized aluminium alloy ultra fine grained steel bar

A kind of isometric helix milling method of large-sized aluminium alloy ultra fine grained steel bar of the present invention is related to technical field of mechanical processing, and in particular to a kind of isometric helix milling method of large-sized aluminium alloy ultra fine grained steel bar includes the following steps：S1：It is 40 200mm to choose diameter dimension D, and length is the aluminum alloy blank of 300 5000mm；S2：Above-mentioned aluminum alloy blank is placed in heating furnace and is heated to 410 440 DEG C；S3：Aluminum alloy blank after heating is transported to from heating furnace in skew rolling mill deflector chute, transhipment time is 5 20s；S4：Feeding is carried out in the deflector chute of skew rolling mill, aluminum alloy blank is sent into the deformed area between skew rolling mill entrance and exit, aluminum alloy blank, which is moved in deformed area inside spin until deforming, to be terminated；S5：Above-mentioned S2 S4 steps are repeated, 2 12 screw rolling is carried out to aluminum alloy blank and obtains aluminium alloy entirety ultra fine grained steel bar；The beneficial effects of the invention are as follows：Deformed area is worn deeply greatly, and multi- pass rolling is reciprocally carried out.Continuous-stable local deformation, pressure turn round complex three-dimensional drastic deformation, can obtain ideal grain refining effect.