Method for controlling aluminium strip material periodic thickness difference

Abstract

The invention discloses a method for controlling periodic thickness difference in producing aluminum alloy strop, the control method comprises grinding a roller and implementing a pressure test on the ground roller; the roller grinding comprises: putting the roller upon a grinder on the basis of a bearing location for grinding to obtain the roller having accurate roller-type parameter and accurate basic circle run-out parameters; the pressure test for the ground roller comprises: mounting the roller on a rolling mill, measuring total rolling force deviation of the roller, judging fluctuation situation of the pressure at both sides of the roller: a, uniform pressure fluctuation at the both sides represents that the roller is qualified; b, non-uniform pressure fluctuation at the both sides represents checking the grinding parameters of the roller. The invention can accurately evaluate the condition of thickness distribution in the entire length direction of the aluminum strip and correctly judge the thickness of coil to control the quality.

Description

technical field [0001] The invention relates to a method for controlling the periodic thickness difference of an aluminum strip. Background technique [0002] At present, aluminum users have higher and higher tolerance requirements for aluminum alloy strip products. Taking 3104 canning material as an example, the previous tolerance requirement was ±0.008mm, but now it is required to reach ±0.003mm, so the accuracy required for thickness control is corresponding improve. There are many factors affecting the thickness of aluminum alloy strip products, such as thickness gauge, billet quality, roll system accuracy and operation, etc. Except for the roll system, other factors are accidental, which may cause individual coil thickness fluctuations, but not There will be a batch problem. Among them, the thickness problem caused by accidental reasons is mostly manifested in a certain length section in the strip production process, that is, the local thickness exceeds the standard, ...

AI Technical Summary

Problems solved by technology

Its shortcoming is that the accuracy of the thickness gauge must be high and stable, and the frequency of adjusting the compensation coefficient will increase; the grinding of the roll is only limited to the accurate control of the basic parameters such as the original roll shape and surface roughness of the roll, while for There are no technical requirements for parameters such as roll runout and base circle runout of assembly dimensions, bearing position runout, and roll pressure, so the control of periodic thickness difference has almost no effect, and the purpose of accurately controlling periodic thickness difference cannot be achieved.

[0004] Existing roll grinding methods are not conducive to accurate control of parameters such as roll profile and base circle runout

Periodic thickness difference fluctuations are not taken into account when detecting strip thickness, so that the parameter changes during roll grinding cannot be accurately guided, and the purpose of accurately reflecting and controlling periodic thickness differences cannot be achieved.