51 steel pipe network provides: Cold rolling and cold drawing combined production process has the advantages of: good quality steel pipe, cold rolled steel pipe wall thickness accuracy and surface quality is higher, cold drawing to ensure the accuracy of steel pipe diameter; cold processing cycle is short, reduce the intermediate degreasing, heat treatment , shrinkage, straightening and other processes, save energy, reduce metal consumption; can use large-scale waste pipe production of small diameter steel pipe, simplify the raw material specifications. At present, the level of cold rolling and cold drawing technology and equipment in the world has greatly developed. The cold rolling mill is developing in the direction of high-speed, long-stroke, ring-shaped L-shaped and high-precision. The characteristics of this rolling mill are as follows: (1) Inertia force and inertia torque vertical balancing mechanism are used to increase the round trip frequency of the rolling mill; The length of rolling deformation zone is 70% longer than that of short-stroke rolling mill. The uniformity of rolling deformation is improved and the delivery volume is increased. 3 Long tube blanks are used, and the length of barren pipe raw materials can be increased to l2 ~ 15m. Long steel pipes can be produced, and the use of rolling mills can be improved. Rate, rolling effective utilization coefficient up to 80%; 4 using a curved mandrel and the best parabolic face type, reasonable metal deformation, long tool life The above characteristics make the cold rolling mill production capacity and product accuracy greatly improve the production of stainless steel pipe The structure of the cold-drawing tube machine is still dominated by chain-type cold-drawing machines, and there are also a small number of hydraulic cold-drawing machines. Multi-line, high-speed, full-automatic is the direction of the current cold-drawing machine development.
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