UA72986U - Method of manufacturing tees from forging blanks by stamping - Google Patents

Abstract

A method of manufacturing tees from forging blanks in which a tubular blank (1) is made with a lateral hole (2), then the blank (1) is placed between separated detachable crimping mobile upper (3) and fixed lower (4) plates (3, 4) of a die (5), into the blank (1) through its side opening (2) a rod (6) is introduced, at the upper end of which a punch (7) is attached using a releasable connection, and then the blank (1) is subject to reduction by volumetric deformation by closing the crimping movable upper (3) and fixed lower (4) plates (3, 4) of die (5), as well as flanging of the side edge of lateral hole (2) by the punch (7) by its pulling through said lateral hole (2) using the rod (6) with forming geometric parameters of a lateral pipe (8) and geometric parameters of the dimension type of a manufactured tee (9), and then the molded tee (9) is removed from the die (5). The blank (1) is made with the oval lateral hole (2), whose major axis is parallel to the axis of the blank (1), after making the blank (1) is heated in a furnace to the temperature of 1200- within a period of time determined by the condition of 12-17 minutes per of the thickness (S3) of blank wall (1), then it is placed between the separated detachable crimping mobile upper (3) and fixed lower (4) plates (3, 4) of die (5), in which removable upper (10 ) and lower (11) inserts (10, 11) are pre-installed, whose geometric parameters of inner surfaces correspond to the geometric parameters of dimension type of manufactured tee (9), and at compressing the blank (1) is given an oval shape with orientation of the major axis of its cross section in a vertical plane by transversal reduction of the blank (1).