Finishing correction die suitable for special material welded pipe and finishing machine

Abstract

The invention discloses a finishing correction die suitable for a special material welded pipe and a finishing machine. The finishing correction die comprises an upper die base and a lower die base, wherein the upper die base and the lower die base are fixed through a positioning pin, a cavity is formed by the interiors of the lower die base and the lower die base after the lower die base and thelower die base are closed, corresponding tiles are arranged in the cavity, die closing gaps are preset between the corresponding inner end faces of the lower die base and the upper die base after dieclosing, adjusting base plates are arranged at the two die closing gaps, the adjusting base plates are fixed to the corresponding inner end faces through stop bolts, it is guaranteed that the edges ofa welded pipe do not make contact with the outer surface of the special material welded pipe by adjusting the thicknesses and positions of the two adjusting base plates, the adjusting base plates comprise two sub-base plates which are combined into a whole to be in a hollow semicircular shape, and transition curved surfaces are arranged on the inner sides of the inner end faces of the upper die base and the lower die base. According to the finishing correction die suitable for the special material welded pipe and the finishing machine, the working performance is stable, diameter finishing capacity is large, the cavity of a die can be accurately and rapidly replaced, simple, exquisite and compact are achieved, special material welded pipes of various sizes can be finished and corrected, and efficient operation of a whole positive production line can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of finishing, and in particular relates to a finishing correction mold and a finishing machine suitable for special material welded pipes. Background technique [0002] Due to the difficult deformation of special materials and the large coefficient of resilience, the roundness and straightness of special material welded pipes have become one of the difficulties faced in the manufacture of special material pipes. Major equipment. The study found that the existing finishing molds in the market have the following deficiencies in use: [0003] ①The upper and lower finishing molds have large centering deviation and mold gap, and the welded pipe is easy to extrude at the gap between the upper and lower finishing molds; ②When finishing special material welded pipes, the upper and lower finishing molds The contact between the inner end of the special material welded pipe and the special material welded pipe wall i...

AI Technical Summary

Problems solved by technology

[0003] ①The upper and lower finishing dies have large centering deviation and mold gap, and the welded pipe is easy to extrude at the gap between the upper and lower finishing dies; ②When finishing special material welded pipes, the upper and lower finishing dies The contact between the inner end of the special material welded pipe and the special material welded pipe wall is a line contact, which often leaves obvious indentations on the outer wall of the special material welded pipe, which affects the appearance quality; The straight weld seam has high hardness, the yield strength of titanium and zirconium materials is large, and the deformation is large. Often, the indentation is squeezed out on the finishing die first, and the protruding part of the indentation is easy to remove the special material in the next finishing. The welded pipe is squeezed, resulting in scratches on the outer wall of the special material welded pipe and damage to the finishing die

Images