Preparation technology of forging elbow

Abstract

The invention relates to the elbow preparation technical field, in particular to a preparation technology of forging elbow. The technology is characterized in that: (1) forging a pipe, namely a forging rod is fixed and forged into a forging pipe, and the eccentricity of the forging pipe is 4-6% of the wall thickness of a finished elbow; (2) bending, namely half-round thin pipe wall of the forgingpipe formed by eccentricity is made into the inner ring of an elbow while the half-round thick pipe wall is made into the outer ring of the elbow after the forging pipe is subject to heat treatment, thus the forging pipe is bent into the elbow. Compared with the prior art, the invention has simple technology, large elbow can be bent by adopting the technology, and the wall thickness of the inner ring and the out ring of the elbow can be ensured to be relatively uniform.

Description

Preparation process of forged elbow [technical field] The invention relates to the technical field of elbow preparation, in particular to a preparation process of forged elbows. [Background technique] The current elbow manufacturing process is mainly to bend the forged pipe with symmetrical center distance into an elbow, which causes the wall thickness of the outer ring of the elbow to become thinner after bending, while the wall thickness of the inner ring becomes thicker after bending. The wall thickness of the inner and outer rings of the elbow is uneven, so that after welding to related equipment in practical applications, it is easy to cause cracks at the thin wall, which affects the service life of the product. [Content of the invention] In order to overcome the deficiencies of the prior art, the present invention uses the eccentricity formed during forging to make half of the forged pipe thicker and the other half relatively thinner. The thicker wall is used as t...

AI Technical Summary

Problems solved by technology

The current elbow manufacturing process is mainly to bend the forged pipe with symmetrical center distance into an elbow, which causes the wall thickness of the outer ring of the elbow to become thinner after bending, while the wall thickness of the inner ring becomes thicker after bending. The wall thickness of the inner and outer rings of the elbow is uneven, so that after welding to related equipment in practical applications, it is easy to cause cracks at the thin wall, which affects the service life of the product

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