Patent ID: 7107809
Filing Date: 2006-09-19
Classification: B21D,Y10T

Abstract:
1. A method for shaping a seamless aluminum wheel rim, comprising the steps of: (a) cutting an aluminum alloy plate into a circular plate; (b) drawing said circular plate into a cup-shaped embryo body by a deep drawing die, said cup-shaped embryo body having a first end being shaped into a cup-shaped cylinder and a second end being shaped into an embryo expansion part with a diameter greater than the diameter of said cup-shaped cylinder; (c) punching out a bottom surface of said cup-shaped cylinder to form a hollow cylinder; (d) putting said cup-shaped embryo body into an expanding-pressing female die having an expanding die cavity respectively at both ends of said expanding-pressing female die thereof and (e) pressing and expanding said cup-shaped embryo body at both ends of said cup-shaped embryo body by two sets of expanding-pressing male dies respectively to make said embryo expansion part and said hollow cylinder respectively form a first expansion part and a second expansion part that construct a wheel rim.