A complete set of equipment for the production of pipes by cold rolling, cold drawing or cold rolling combined with cold drawing. It is a unit for deep processing of hot rolled pipe or welded pipe.
Different processing methods and corresponding processes are selected depending on the processing properties of the metal, the size of the pipe, the quality requirements, and the investment and benefits.
The basic processes of cold-rolled cold drawn tubes are:
(1) Pipe material supply, the pipe material used is hot-rolled finished pipe or semi-finished pipe, extruded pipe and welded pipe;
(2) Preparation of pipe materials, including inspection, bundling, pickling, washing, rinsing, neutralization, drying, coating of lubricants, etc.;
(3) cold working (cold rolling or cold drawing);
(4) Finished product finishing includes heat treatment of finished products, straightening, sampling, cutting head, inspection, hydraulic test, oiling, packaging, storage, etc. Different product finishing content is different.
The production characteristics of the cold-worked pipe unit are that the pipe material is usually subjected to multiple cold deformations and work hardening from the input to the finished product. Therefore, the whole production process is composed of a plurality of preparation processes and deformation processes, and has the characteristics of reciprocating and continuous, so that the process is numerous. The production cycle is long, the metal consumption is large, the production efficiency is low, and the general production scale is not large.