Abstract
In this paper, the typical U-shaped pieces were taken as the object of study and the finite element numerical simulation software Dynaform is applied to simulate the effect of sheet metal bending. The U-shaped bending spring back and its thickness change are analyzed. The influence law of main parameters of die structure to sheet thickness change and the spring back amount are obtained by combining with the orthogonal analysis method. Finally a set of the optimal parameter combination is found, the spring back of U-shaped piece and the change of the thickness are controlled in a reasonable range.
Highlights
Sheet metal bending is a complicated process, after bending, the spring back affect occurs and its thickness will reduce
There are many parameters that affect the quality of curved pieces and in the structure of mold, die clearance, coefficient of friction, punch round radius, die round radius and other major factors affect the quality of curved pieces, and the values of parameters change within a range
The finite element numerical simulation software Dynaform can simulate the process of sheet metal bending, and predict the result of sheet metal bending accurately
Summary
Sheet metal bending is a complicated process, after bending, the spring back affect occurs and its thickness will reduce. Spring back affects the accuracy of part, and reduction of thickness affects the strength of part [1, 2]. There are many parameters that affect the quality of curved pieces and in the structure of mold, die clearance, coefficient of friction, punch round radius, die round radius and other major factors affect the quality of curved pieces, and the values of parameters change within a range. It is very difficult to accurately count values of spring back and reduction of thickness in theory. The finite element numerical simulation software Dynaform can simulate the process of sheet metal bending, and predict the result of sheet metal bending accurately. U-shaped bending is a kind of typical sheet metal bending type
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