Forming method of variable cross section special-shaped single tube of thrust chamber body of liquid-propellant rocket engine

• Main Authors: DU LIYA, XIONG HEQIN, LI YULEI, LI JINTAO
• Format: Patent
• Language: Chinese; English
• Published: 12.04.2019
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; TRANSPORTING; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

The invention discloses a forming method of a variable cross section special-shaped single tube of a thrust chamber body of a liquid-propellant rocket engine. The method comprises the following stepsthat (1), bend shaping is conducted, specifically, a single tube workpiece in the annealing state and filled with filling materials is placed in a bend shaping tool for bend shaping machining, so thatthe workpiece can be bent along an inner molding surface curve of a theoretical single tube; (2) preforming is conducted, specifically, the single tube workpiece is placed in a preforming tool of a hinge pressing plate structure, the preforming tool is adopted to press the single tube workpiece in an oblateness shape with plane included angles of two sides being the same as the theoretical singletube; (3), hydraulic bulging is conducted, specifically, an internal high pressure forming mold with a high pressure forming inner cavity being completely attached to the outer surface of the theoretical single tube is adopted