METHOD AND DEVICE FOR MAKING PRESS PUMPS FOR FLUID MEDIA Russian patent published in 2019 - IPC B21C23/20 

FIELD: physics.

SUBSTANCE: invention relates to production of high pressure vessel. Closed high pressure vessel is molded from extruded metal. Vessel comprises section of closed end, cylindrical side wall with inner diameter in cross section, flange and neck and has longitudinal axis of symmetry, wherein the inner end profile of the closed end section includes a center section, at least one intermediate ring and the outermost ring with different radii values of the curvature of their surfaces R, r and Rc, respectively, wherein said extreme ring, at least one intermediate ring and central section form a surface connecting cylindrical side wall with central point, in which section of closed end crosses longitudinal axis of symmetry, wherein cross-section through joint of extreme ring with cylindrical side wall crosses longitudinal axis of symmetry at axial distance H from said central point and wherein axial distance H is in range from 0.28 inner diameter to 0.5 inner diameter.

EFFECT: vessel can be produced by cold or warm extrusion and has equivalent or extended service life in comparison with known vessels made by hot extrusion.

22 cl, 6 dwg, 6 tbl