End Forming of A Round Tube into A Polygon Section With Small Corner Radii
The present invention relates to an end forming / expansion of a round tube into a polygon section having small corner radii and a method thereof. Accordingly, the end forming / expansion of the round tube into the polygon section includes: a) a conical die with a predetermined taper angle, wherein a tube having predetermined cross sectional end or diameter (D), thickness (t) and length (L) is provided and is to be placed on top of the said conical die, and a conically-expended tube is formed by an axially and/or uniformly compression force of a compression punch over the tube through the taper angle of the conical die at 1st stage of end forming / expansion process; and b) a taper square or polygonal die with an entry angle (α) and an escape angle (β) is used in association with a conical bottom square or polygonal punch to form a square or polygonal section from the conically-expended tube at 2nd stage of end forming / expansion process; and wherein end formation of tube into other polygon sections can be obtained by changing the shape of the punch and die in the 2nd stage.
Contact person for this offer:
ChM Dr. Lee Ching Shya, PhD (Dual), RTTP
Technology Transfer Manager
Tel: +603-7967-7351/ 013-2250151