Integrated method for forming tubular part

• Main Authors: SUN LEI, CHU GUANNAN
• Format: Patent
• Language: Chinese; English
• Published: 28.07.2020
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PUNCHING METAL; TRANSPORTING; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

The invention provides an integrated method for forming a tubular part. The method comprises the following steps that 1, an initial tube blank is selected; 2, a mold closing position A and a positionB are determined; 3, the initial tube blank is heated to the temperature T, and T is in the scope of 300 DEG C-1400 DEG C; 4, a die is opened, the initial tube blank is put in a lower die, and an upper die is closed to the position B; 5, the two ends of the initial tube blank are sealed, a first valve is opened, fluid medium with pressure P fills the interior of the initial pipe blank, the initialtube blank is expanded to partially attached to the die, and the sharp portion of the initial tube blank is not completely attached to the die; 6, the internal pressure of the initial tube blank is adjusted to pcr; 7, the upper die moves to the die closing position A to be completely attached to the die; 8, a second valve is opened, the die is quenched under an internal pressure support; 9, the first valve is closed, the