Derust device of metallic bar and pipe

Abstract

The invention relates to a rust removal device for metal rods and pipes, which is characterized in that the metal rods and pipes to be derusted are twisted radially in a controlled manner, and then reversed to restore the metal rods and pipes, or retain parts The torsion value, or the number of positive torsion circles exceeded. The present invention makes use of the huge difference in the metallographic molecular structure properties of the metal substrate and the oxide layer attached to its surface, and uses the controlled torsion and controlled reverse torsion methods to make ferric oxide, ferric oxide, ferrous oxide or other The oxide layer on the metal substrate is completely separated from the metal substrate by self-explosion and self-abandonment during forward and reverse rotation, so as to achieve the purpose of removing the oxide layer. The invention does not have the acid hydrogen and oxygen caused by pickling to the metal substrate, especially the serious pollution of air and water by acid, and the noise and dust pollution caused by shot blasting, sand blasting and grinding.

Description

technical field [0001] The invention belongs to a rust removal device for metal rods, strips, pipes, blanks or other geometric cross-sections, which is used for cleaning and derusting the surface of metal rods and pipes before drawing or finishing rolling. Background technique [0002] At present, manufacturers and scientific research institutions in steel reforming, fasteners, metal products and other industries still use sulfuric acid, hydrochloric acid, nitric acid, oxalic acid, phosphoric acid, and hydrogen for surface purification and cleaning before steel cold drawing or finishing rolling and flaw detection. Fluoric acid or mixed acid is used for surface purification, water washing, and neutralization, and then a lubricating layer is applied, and then drawing or rolling is carried out. The pickling process not only causes a lot of waste of resources, but also has poor working conditions, high labor intensity and is extremely unsafe. Especially serious pollution to the...

AI Technical Summary

Problems solved by technology

The pickling process not only causes a lot of waste of resources, but also has poor working environment, high labor intensity and extremely unsafe conditions.

especially serious pollution to the environment

In order to solve this common phenomenon, recently developed countries and domestic large-scale production enterprises with certain strength have adopted high-speed shot blasting, sand blasting, and grinding processes and equipment to clean the surface of bar blanks. The cost of the process is high, the cost is huge, and it is accompanied by a lot of noise and dust pollution, and the cleaning of the surface of the material is not thorough, so it has not been widely used, and only a small number of manufacturers use it.

At present, there is no purification and cleaning technology that can effectively purify and clean the oxide layer on the surface of bars, strips, pipes, and billets without the above-mentioned pollution, is economical, practical, and suitable for various geometric cross-section steels.

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