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Preparation technology of forging elbow

A preparation process and elbow technology, which is applied in the field of forged elbow preparation process, can solve problems such as cracking at thin wall parts, affecting product service life, uneven wall thickness of inner and outer rings of elbows, etc., and achieves the effect of simple process

Active Publication Date: 2009-12-16
SHANGHAI CHANGQIANG POWER
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Problems solved by technology

[0002] 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

Method used

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  • Preparation technology of forging elbow

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with the accompanying drawings.

[0010] Forged tube: fix the forged rod and punch it into a forged tube. The eccentricity of the forged tube is 4% to 6% of the wall thickness of the finished elbow;

[0011] Bending: according to the material of the forged pipe, heat the forged pipe to 1050-1200°C after heat treatment, and then sandblast and grind the inner and outer surfaces of the forged pipe as required, and remove the wall of the forged pipe formed by the eccentricity. The thin part of the semicircular pipe wall is used as the inner ring of the elbow, and the thick semicircular pipe wall is used as the outer ring of the elbow, and the forged pipe is bent into an elbow, so that the bent wall of the elbow is The thickness is relatively uniform, so that the elbow with uniform wall thickness can be obtained after a little finishing treatment such as grinding. In addition, the bent elbow can be subjecte...

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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 forging pipe 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

[technical field] [0001] The invention relates to the technical field of elbow preparation, in particular to a preparation process of forged elbows. [Background technique] [0002] 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] [0003] 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 the outer ring ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/02F16L43/00
CPCB21K1/16F16L43/001
Inventor 周菊明
Owner SHANGHAI CHANGQIANG POWER
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