The invention relates to the technical field of
pipe fitting forming, in particular to a forming method of a flat
pipe fitting. The forming method comprises the following steps that A, edge rolling isconducted, wherein a plate is bent and rolled, the two ends of the plate are welded, and the plate forms a closed ring body through a
welding seam; B, radial forming is conducted, wherein a mold corematched with the preset shape of the
pipe fitting is added into the welded closed ring body, then the side wall of the
pipe fitting is pressed to make the radial section of the
pipe fitting achieve apreset shape, and the
welding seam is made to avoid the inflection point position of the closed ring body on the radial section in the process; and C, axial forming is conducted, wherein after the radial section of the
pipe fitting is formed, the front end and the rear end of the pipe fitting are
cut correspondingly to make the pipe fitting achieve a preset shape in the axial direction. Accordingto the forming method, the plate is connected into the closed ring body through the
welding seam, the
grinding amount is greatly reduced, the mold core is added into the pipe fitting, the interior and the exterior of the pipe fitting are formed simultaneously, the problem of part springback is solved, the
workload of manual shape correction is reduced, the pipe fitting forming effect is better, the quality guarantee of products is enhanced while the production efficiency is improved, and
mass production of the flat pipe fitting is achieved.