| 摘要 |
FIELD: plastic working of metals, possibly manufacture of cylindrical branch pipes with inclined cut. ^ SUBSTANCE: method comprises steps of calculating coordinates of development and plotting it; determining Y-coordinates of development with use of two formulae taking into account thickness of branch pipe wall; forming butt portion of development with use of two sine curves passing through upper points of Y-coordinates and defining broken mean line of butt faces of branch pipe. ^ EFFECT: enhanced butt joining capability of branch pipes with inclined cut due to elimination of dip in mean portion of development. ^ 5 dwg |
