Method for removing oil of inner surface of small-caliber cold-rolling pipe

Abstract

The invention belongs to the field of steel pipe processing and manufacturing and particularly relates to a method for removing oil of an inner surface of a small-caliber cold-rolling pipe. A water-soluble cleaning agent and ultrasonic vibration are adopted, an inner wall is subjected to sand blasting washing, and oil stains of the inner surface of the small-caliber cold-rolling pipe are removed. The method comprises the steps of filling a material and immersing the pipe, conducting ultrasonic vibration, washing the inner wall by using a solution, washing the pipe by using hot water for the first time, subjecting the inner wall to sand blasting washing, cleaning the inner wall by using clean water, washing by using hot water for the second time, and checking. According to the method, the oil stains of the inner wall of the small-caliber cold-rolling pipe which is immersed in the water-soluble cleaning agent are subjected to vibration stripping through ultrasonic waves, the inner wall is washed by the solution which flows circularly, the oil stains of the inner wall are removed, the hot water and clean water are used for washing the inner wall respectively, and finally the inner wall is subjected to ceramic sand blasting, cleared completely and cleaned by using hot water. According to the method, the oil stains which are attached to the inner surface of the small-caliber cold-rolling pipe can be cleared completely, the problem that carburization of the inner wall of the steel pipe is caused during subsequent heat treatment due to the fact that the oil stains are carbonized is solved, and the method is pollution-free for the environment and causes no damage to a processed material.

Description

technical field [0001] The invention belongs to the field of steel pipe processing and manufacturing, in particular to a method for degreasing the inner surface of a small-diameter cold-rolled pipe. Background technique [0002] During the cold-rolling process of the steel pipe, the inner and outer surfaces of the steel pipe are attached with strong adhesive forming and rolling oil. Traditionally, strong acid or toxic trichlorethylene is used for cleaning, which not only pollutes the environment, but also easily causes corrosion to the material. Various types of cleaning agents have been developed at present, but their degreasing effect is average, especially for small-diameter and long steel pipes, the oil on the inner wall cannot be cleaned, which directly affects the internal quality of the steel pipe. Through water-soluble cleaning agent + ultrasonic vibration + sand blasting on the inner wall, the inner wall of the steel pipe is repeatedly degreased and cleaned to achie...

AI Technical Summary

Problems solved by technology

[0002] During the cold-rolling process of the steel pipe, the inner and outer surfaces of the steel pipe are attached with strong adhesive force forming and rolling oil. Traditionally, strong acid or toxic trichlorethylene is used for cleaning, which not only pollutes the environment, but also easily causes corrosion to the material.

At present, various cleaning agents have been developed, but their degreasing effect is average, especially for small-diameter and long steel pipes, the oil on the inner wall cannot be cleaned, which directly affects the internal quality of steel pipes