Research of rational roll profiling during cold rolling of tapes from copper and yellow metal

Abstract

It is shown that a main route of development of pressure treatment of non-ferrous metals is a heading of innovative designs in the manufacture, providing development of manufacture of new brands of alloys from brass metal and copper with demanded mechanical properties, including with high heat conductivity, and also the improved critical bucklings. Such properties tapes from brass metal and copper, and also their alloys with the improved critical bucklings possess. By manufacture of manufactured goods, and also by manufacture of the goods of mass demand (heat exchangers, pipes, radiators) are used cold rolling tapes from brass metal and copper. It is shown that questions of martempering of geometrical figures of merit of tapes from brass metal and copper, including formation of the transverse nonuniform thickness, a cross profile and the geometrical form of tapes, and also definition profiling rolls reversible four rolling mill and two rolling mill at cold rolling demand the development. It is installed that the major parametre of dimensional accuracy of tapes are nonflatness and the transverse nonuniform thickness, that is change of a thickness of a tape on its width. It is shown that on the form interstitial a positive allowance forming the transverse nonuniform thickness of tapes, following factors influence: an elastic bending flexure rolls, irregularity of flattening on length of the barrel rolls on work roll and hire contact, thermal convexity of barrels of shafts, deterioration of barrels rolls, a hydraulic bend rolling systems, the original transverse nonuniform thickness, profiling rolls. A traditional method of formation interstitial a positive allowance is profiling rolls which in huge extent influences a course of process of rolling and quality of metal products. Dependences for calculation rational profiling work rolls, and also an elastic bending flexure rolls on length of the barrel, equal width rolling tapes for the vacuum mill are presented. It is shown that at rolling of tapes from copper on the reversible two rolling mill 350×450 with use rational profiling rolls the deviation from planeness of ready tapes fulfils to acting specifications. At rolling of tapes from yellow metal on reversible four rolling a mils 150/500×400 with rational profiling rolls, the transverse nonuniform thickness of tapes of 1,00 mm matches in the thickness to the raised accuracy.