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Cold drawn seamless tube manufacturing process and features
Apr 03, 2018

In the cold-drawing seamless tube manufacturing process, the material must be selected first. Usually, cold-precision precision steel pipes are mainly made of steel No. 10 and No. 20. In addition to ensuring chemical composition and mechanical properties, hydraulic pressure testing, crimping, flaring, and flattening tests are also required. In actual production, the basic process of cold-drawn seamless tube manufacturing process can be summarized as follows:

 

The first is the supply of pipe, and the cold-drawn seamless pipe manufacturing process usually requires that the pipe used is a hot-rolled product pipe, or a semi-finished pipe, an extruded pipe, and a welded pipe;

 

The second is to prepare corresponding piping materials, including inspection, baling, pickling, cleaning, rinsing, neutralization, drying and lubricant coating;

 

The third is the cold processing of the cold-drawn seamless tube manufacturing process, including cold rolling and cold drawing;

 

The fourth is finished product finishing. In the cold-drawn seamless tube manufacturing process, this link mainly includes: heat treatment of finished products, straightening, sampling, cutting head and tail, inspection (manual inspection and various inspections), water pressure Testing, oiling, packaging, storage, etc. Different product finishing content varies.

 

In general, the simple process of cold-drawing seamless tube manufacturing process can be summarized as follows: First, choose the appropriate round tube blank, followed by heating → piercing → heading → annealing → pickling → oil coating (copper plating) → multi-channel Cold drawing (cold rolling)→blank tube→heat treatment→straightening→hydraulic pressure test (flaw detection)→marking, and finally storage.

 

From the analysis of the cold-drawn seamless tube manufacturing process, the main production feature is that the tube material from the input to the processing into the finished cold-drawn precision steel tube, often requires many times of cold deformation and work hardening, so the entire production process by A plurality of preparation processes and deformation processes are combined and have the characteristics of reciprocating circulation.

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