保定市冷拔无缝钢管厂

冷加工方式的配置     按冷轧和冷拔使用情况，方式配置可有单一冷轧、单一冷拔和冷轧冷拔结合3种方案。

Cold processing configuration used in cold rolling and cold drawing, configuration can single cold rolling, cold drawing and cold rolling and drawing a single combination of 3 kinds of scheme.

(1)单一冷轧方案。和冷拔相比，冷轧变形时应力状态好，道次变形量大，可减少中间工序并缩短生产周期，能降低消耗和降低成本，适宜加工塑性差的高合金钢管和难变形的有色金属。其缺点是生产力低，生产灵活性较小。

(1) single cold rolling scheme. Compared with cold drawing, cold rolling has good stress state and large pass deformation. It can reduce intermediate processes and shorten production cycle, reduce consumption and reduce cost, and is suitable for processing high alloy steel tubes and non-ferrous metals with poor plasticity. Its disadvantages are low productivity and less flexibility in production.

(2)冷轧冷拔结合的方案。是管材冷加工的合理方案，冷轧冷拔相结合可发挥冷轧变形量大和冷拔生产灵活的优点，以减少工序、缩短生产周期、提高生产力和扩大品种。采用冷轧冷拔结合方案时，通常是管料先在冷轧机上轧到定壁或定壁前的某个道次，然后进行拔制，直至成品道次。

(2) the combination of cold rolling and cold drawing. It is a reasonable plan for cold processing of pipes. The combination of cold rolling and cold drawing can bring into play the advantages of large cold rolling deformation and flexible cold drawing production, so as to reduce process, shorten production cycle, increase productivity and expand varieties. When cold rolling and cold drawing are combined, the pipe material is usually rolled on the cold rolling mill to a certain pass before or before the wall is fixed, and then pullled until the finished product passes.

(3)单一冷拔方案。由于冷拔的道次变形量较小，变形道次多，中间工序多，生产周期长，金属及辅助材料消耗大，单一冷拔方案不是最优方案。但拔管机结构比冷轧机简单，投资少，操作容易掌握，工具的制造和更换方便，生产灵活性大，生产力也较高。故采用单一冷拔方案来加工碳钢、低合金钢管和一般有色金属管在实际生产中有广泛的应用。

(3) a single cold drawing scheme. Due to the small deformation of cold drawing, there are many deformation passes, many intermediate processes, long production cycles, and large consumption of metal and auxiliary materials. The single cold drawing scheme is not the best one. But the structure of the pipe pullout machine is simpler than the cold rolling mill, the investment is less, the operation is easy to master, the manufacture and replacement of the tool is convenient, the production flexibility is big, and the productivity is high. Therefore, a single cold drawing scheme is used to process carbon steel, low alloy steel tube and nonferrous metal tube in practical production.