The reason of High-speed foil rolling bulge reason

2015/11/13 8:39:04

Generally believed buried together leaflets foil rolling speed should reach 80% of the design speed of the rolling mill, Danyang Aluminum Company from Germany to introduce a 1500 mm ACIIENACH company four roller irreversible design speed aluminum foil roughing mill to 2 000 m / min currently single aluminum foil rolling speed substantially 600m / miT, horizontal, domestic single rolled speed is generally based juice rate 60% to 70%.

Often encountered in high speed rolling aluminum foil wrinkling, string layer, from the dark, poor flatness and other issues. Any defect could cause the next pass scrap, finished product rate dropped other issues. Make some qualitative analysis of the aluminum-up drum phenomena encountered in the production of high-speed rolling

The definition of bulge

It refers to the winding-up drum foil surface along the rolling direction partial or continuous projections. Its essence is where aluminum foil loosely, after coiling raised porosity than flat at large. With the aggravation from the drum, the drum part will play from the bar, from the runoff inspectors crack Gu starlings?

Cause of bulge

Aluminum foil rolling process, it will generate a lot of heat and friction heat deformation. The rolling deformation zone is always in the heated state. Roll if the local temperature is too high deformation zone. It exceeds the maximum cooling capacity of rolling punch cooling oil, so where thermal expansion becomes larger, with the export of aluminum foil should be at the loose, as it can not be flattened in aluminum foil coiling process. The porosity of the premises after winding ratio flat at cumulative after the formation from the dark, in some of the information will be referred to as hot drums. The main reason for the actual production, resulting in aluminum rolling drum are the following force plane