Die Design And Optimization Of Aluminum Cans

Aluminum cans as a metal packaging containers, has the advantages of lightweight, easy to transport, recycling, long shelf life, are widely used in beverages, beer industry, consumption increased year by year. But with the growing competition in the packaging market for many canning companies, minimize the weight of a single tank, improving the utilization of aluminum to reduce the defect rate, improve production efficiency has become an important pursuit of business objectives. However, due to the die used to produce cans have manufacturing precision low, life is short, poorly designed and other shortcomings, often leading to the tank folds, scratches, cracks and other problems with the production of cans. So many canning companies need to import from abroad mold, which will increase the burden on enterprises. In view of this phenomenon, the project team decided to design and optimize the aluminum cans mold.This subject stem from the School-Enterprise cooperation project aims to design a long life, high precision, structural parameters correctly of aluminum cans mold, improve the quality of the tank. The main work and research contents of this paper are as follows:First of all, canning cup mold and process scheme analysis, select the composite blanking drawing die. The blank layout of reasonable design, improve the utilization rate of the material during blanking. According to the table and calculation, the main parameters of the die are selected, such as the appropriate blanking clearance, the drawing gap, the inner diameter of the drawing die, the die radius and so on. At the same time, the structure of the main parts of the cup mold is designed in detail.Secondly, the can body forming process are analyzed, the changes of each stage of the body shape. Through the look-up table and calculation, select more suitable drawing coefficient, ironing coefficient, main parameters and drawing die diameter of forming die. At the same time, the structure of the main parts of the tank body die is designed in detail.Finally, through the establishment of a cup and redrawing the numerical model for each process finite element simulation, each numerical simulation of FLD curve, thickness change. The results show that the cup and tank in the process of drawing does not appear broken, only the cup and the tank opening at severe wrinkling. In order to improve the surface quality of the cup and the body, the important parameters such as blank holder force, die radius and die clearance were optimized. The data obtained from the simulation optimization, when the blank holder force is 11000N, the die radius is 3.5mm, the drawing gap is 0.305mm, the quality of the cup will be better; When the redrawing blank holder force is 1742N～3484N, the die radius is 1.9mm～2.5mm, the quality of the cans is optimal. Through the numerical simulation analysis, optimization of mold structure parameters, the mold has been applied to the practice of production, and achieved the desired results.