How to use aluminum foil thickness difference tension adjustment

Aluminum foil rolling before changing tension (σ1) and back tension (σ0) values ??the role swap thick vary greatly. Equivalent tension on the change before and after the impact of foil thickness , tension before tension is much smaller than the rear , but the tension σ1 right before being rolled foil flatness there is a huge impact . To ensure the quality of the finishing machining processes , hoping to specify a minimum tension of the first , so in fact before the tension σ1, is used as a parameter for adjusting thickness , before the dynamic tension control accuracy is usually ± 5 % range.

In contrast, after the tension in thick foil rolling tone is very clear and important role , as compared with the speed of adjustment thick , thick with tension adjustment rapid and sensitive features. However, by changing the material thickness of the back tension adjustment tank , the tension by adjusting the amount of stable rolling process flow conditions. Excessive tension is likely to cause breakage of aluminum .

The rolling passes , in order to improve production efficiency are generally used close to the maximum design speed of the rolling mill . Currently , the pass can already use the normal speed rolling up to 2500m/min . At this point the tension can only be used to fine-tune fine-tuning approach thickness difference . So the mill thick tone system design, electronic control system must be increased tension regulation accuracy. But also to set up high-precision tension measuring roll , used to directly measure the tension .

In foil rolling production of all passes , the tension adjusting thick links actually can participate thick droop . The design tension control adjustment range pass 30% of a given tension within the thick tone to meet the requirements .