Processing method of cold drawn cylinder tube

Abstract

The invention provides a method for processing a cold-drawing oil cylinder pipe. The method comprises the following steps: step one, processing the head part of a steel pipe; step two, drilling holes in the steel pipe; step three, performing acid washing on the steel pipe; step four, performing phosphorization on the steel pipe; step five, saponifying the steel pipe; step six, performing cold drawing on the steel pipe. The method provided by the invention has the advantage as follows: the problem of defects in the conventional cold drawing process is solved; the method is suitable for cold drawing of oil cylinder pipes, the wall thickness of which is required to be reduced greatly; the quality of the oil cylinder pipes after cold drawing can be improved; the uniform wall thickness of the oil cylinder pipes after cold drawing can be ensured, and the inner surfaces and outer surfaces of the oil cylinder pipes after cold drawing are smooth.

Description

technical field [0001] The invention relates to the field of steel pipe processing, in particular to a processing method for cold-drawn cylinder pipes. Background technique [0002] Cold-drawn steel pipes are steel pipes with no seams on the surface of the whole steel pipe produced by drawing, extrusion, perforation, etc., which are made of steel ingots or solid tube blanks through perforation to make capillaries, and then made by cold drawing, which can greatly save machining. Working hours, improve material utilization, and help improve product quality. Steel pipes include oil cylinder pipes, seamless steel pipes and other types. Compared with seamless steel pipes, oil cylinder pipes have the following advantages: smaller outer diameter; high precision of cold-drawn finished products; good surface quality; more complex cross-sectional area of ​​steel pipes; superior performance of steel pipes ; The metal is relatively dense. The existing cold-drawn steel pipe processing ...

AI Technical Summary

Problems solved by technology

The existing cold-drawn steel pipe processing methods are mainly aimed at seamless steel pipes. The ordinary cold-drawing process will lead to poor quality of the inner and outer surfaces of the processed steel pipes, and there are often defects such as pits, pitting, and scratches, which are difficult to meet. requirements; there are also some reasonable cold drawing processes, such as the Chinese patent application number 201010614321.2, which provides a cold drawing process for aviation-grade seamless stainless steel pipes, including the following steps: degreasing, solid solution treatment, pickling raw materials, swimming cold Rolling, swimming cold drawing, and finished products, but the cold drawing process is mainly aimed at seamless stainless steel pipes. Compared with the original steel pipes, the finished products can only reduce the limited wall thickness, while the oil cylinder pipes need cold drawing to reduce the wall thickness. It will exceed 1cm. If this method is used to cold draw the cylinder pipe, the cold drawing machine will be damaged, and the steel pipe will be damaged at the same time, making the cold drawing of the steel pipe uneven, resulting in the scrapping of the steel pipe