Cutting method of cold drawn seamless tubing

Cold drawn seamless tubing is seamless pipes with high dimensional accuracy and good surface finish for mechanical structures and hydraulic equipment. The use of cold drawn seamless tubing to manufacture mechanical structures or hydraulic equipment can greatly save machining hours, improve material utilization, and help improve product quality.

How is cold drawn seamless tubing cut?

1) Mechanical cutting adopts external installation and internal installation.

It adopts the principle of turning tool to cut and bevel the nozzle. The single machine has a large span, can process a large thickness, less waste, no pollution, and does not generate high temperature during processing. It does not affect the pipe material, which is conducive to the welding. Water cutting processes pipes through the combined action of high-pressure pump and emery. The incision is clean and the processing span is large, but its efficiency is low and the processing thickness is severely limited. It is manifested in the inconsistency between the center line of the cold drawn seamless tubing and the drawing, the improper installation of the drawing die, the drawing speed is too fast, the tool selection is not appropriate, the diameter of the mandrel rod is too large or too small, the amount of deformation is too large, the core The rod was not sent in time and so on.

2) Oxygen acetylene flame cutting

By adjusting the oxygen valve and acetylene valve, the mixing ratio of oxygen and acetylene can be changed to obtain three different flames: neutral flame, oxidizing flame and carbonizing flame.

3) Ion cutting

Plasma cutting with different working gases can cut various metals that are difficult to cut by oxygen cutting, especially for non-ferrous metals (stainless steel, aluminum, copper, titanium, nickel), the cutting effect is better; its main advantage is the cutting thickness When the metal is not large, the plasma cutting speed is fast, especially when cutting ordinary carbon steel sheets, the speed can reach 5~6 times that of the oxygen cutting method, the cutting surface is smooth, the thermal deformation is small, and the heat affected zone is less. The second feature is that due to the integrity, the layers of the cold-drawn steel pipe cannot have different extensions during deformation, so the layers must be mutually restrained. Using the plastic method instead of the elastic method to calculate the strength can increase the bearing capacity of the member by 14%

Article source: https://article-realm.com/article/Finance/20218-Cutting-method-of-cold-drawn-seamless-tubing.html