Method for shaping special pipe fitting having connection edge

• Main Authors: HE, Zhubin, YUAN, Shijian, LIN, Yanli, FAN, Xiaobo
• Format: Patent
• Language: English
• Published: 03.09.2020
• 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

A method for shaping a special pipe fitting having a connection edge, relating to the field of special pipe fitting shaping. First, an original pipe blank (4) having an integrated flange edge (4-2) is fixed on a mold (5, 6), the original pipe blank (4) adapting to the requirement for connection to an adjacent structure, and pre-deformation, i.e., bending or flattening, is performed on the original pipe blank, so as to deform the original pipe blank and the flange edge thereof so that the cross-sectional shape and bending axis of the pipe blank are approximate to those of a final part to obtain a pre-shaped pipe blank (5-3, 6-3); then the pre-shaped pipe blank is placed in a final shaping mold, the pre-shaped pipe blank is deformed under the effect of an internal pressure and an external load, i.e., an axial thrust, so that the pre-shaped pipe blank is attached to the mold and shaped to have bending axis and cross-sectional shape required to obtain the final special pipe fitting; the corresponding positions of the outside integrated flange and of a pipe wall are machined to obtain a connection hole required so as to complete machining. The present method has a simple process, high structural reliability and low manufacturing costs, and is a novel special pipe fitting shaping method.