Rolling method for wide metal strap foil

Abstract

The invention relates to a rolling method for a wide metal strap foil. By using a rolling mill with unequal working rollers, the roller diameter of one working roller of the rolling mill is greater than that of another working roller. During rolling, the linear speeds of roll surfaces of two working rollers are same, and the metal strap foil is wrapped to the roll surface of one working roller at an inlet side or an outlet side of a roller gap formed by the two working rollers to form a wrapping arc. Backed up by the working roller, tension of the metal strap foil is uniformly distributed on cross section of the wrapping arc. The strap foil is rolled by using the rolling mill with unequal working rollers, so that it is favorable to thin the strap foil and obtain a better plate shape. In addition, the wrapping arc is formed on the working roller of the strap foil, and backed up by the working roller, the front tension of the strap foil is uniformly distributed on the cross section of the wrapping arc at the inlet side, so that uniform tension rolling of the strap foil is realized, a bottleneck that restrains development of the strap foil in wider, thinner and more ideal plate shape is broken through, and the technical problem in the industry is solved.

Description

technical field [0001] The invention relates to the technical field of rolling, in particular to a rolling method of high-precision wide-width metal strips and foils, which is used to obtain good plate shapes. Background technique [0002] With the advancement of the technology industry, the market demand for high-precision wide-width thin strips and foils (hereinafter referred to as strips and foils) is becoming more and more urgent. Under the current technical background, the rolling technology for wide and thick strips is basically mature, but the technical bottleneck has emerged in the rolling technology of high-precision wide and thinner strips and foils, and a breakthrough is urgently needed. For thicker strips, even if there are shape defects after rolling, the shape can still be corrected by tension leveling or other leveling means, while for thinner strips and foils, especially very thin foils, due to lack of follow-up The shape correction means, the original rolli...

AI Technical Summary

Problems solved by technology

It is well known that the smaller the diameter of the work roll, the more favorable it is for the thinning of the strip foil 5, but it also brings problems: in Figure 4 Among them, the diameter of the left working roll is small, the rigidity is small, the bite angle of the strip foil 5 is large, and the lateral component of the rolling force is large, so its lateral bending tendency is large

[0008] To sum up, small-diameter work rolls are good for thinning, but limited by the difficulty in controlling the rolled strip shape, so the rolling width should not be too large; while large-diameter work rolls are conducive to the control of rolled strip shape and are suitable for rolling. Wide, but not suitable for rolling thin

For wide strip foil with a thickness of less than 0.3mm, the diameter of the work roll must be small enough (usually 25-50mm in diameter) to obtain a large amount of rolling reduction, and the shape of the plate at this time will be very difficult to control , which is currently the bottleneck restricting high-precision wide-width strip and foil rolling

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