Stamps for open die forging of forgings

摘要

1. Stamp for open die forging in the forging draft end, preferably annular forgings with inner and outer burr shifted to one or opposite ends of the forging comprising upper and lower halves with engravings forming the stream, and store obloyny bridge with obloynym bridge formed conjugation horizontal portion directly adjacent to the die stream, the length of which is 0.1-0.3 obloynogo bridge width, with a portion beyond the end face of the forging, the protrusion formed on one half of the die, limited part of the circumference (arc) of radius r and the groove on the other half die radius Rotlichayuschiysya in that the protrusion radius centers r and radius bore Rraspolozheny not above a line parallel to the base of the projection passing through the radius of rounding projection center adjacent to the stream stamp portion, the center of the radius of the bore Rsmeschen in side of the stream by an amount Δl less than h / 2, with the projection forming expanding obloyny bridge bore radius of Rvybirayut sootnosheniyaR = R + h + Δl, where h - height of the burr on the calculated obloynom bridge, Δl - value displacements Rotnositelno center protrusion radius center bore radius R.2. Stamp according to claim 1, characterized in that the bridge portion obloynogo adjacent the die stream is formed at an angle of not more than 45 ° to the end face of the forging and beyond it.