Calculate the bending unfolding size by applying the stamping unfolding coefficients:
A: Straight edge length (A1, A2 on both sides).
R: the size of R inside the bend.
T: material thickness.
P: bending unfolding factor.
W: inner R bending angle π:3.1416.
Then: the unfolded length after unfolding is L=A1+A2+W/360*2*3.1416*R*P.
Expanded Information: As a mold designer, designing a mold is not only about considering the structure of the customer's drawings. The most important thing to remember is that the molds are not only designed to meet the requirements of the customer's drawing, but also to meet the requirements of the customer's drawing in terms of dimensional tolerances, i.e., precision. Here the most difficult to ensure that the most test mold designers is the stamping and bending to unfold the accuracy of the relevant dimensions. The stamping bending coefficient is experienced mold designers, based on years of design experience repeatedly verified and summarized the data of things, and later mold designers can be directly into the formula can be obtained by bending the structure of the unfolding of the flat plate size. Based on this point, stamping and bending coefficient is for mold designers to calculate the unfolding of the size of the summary, regardless of which mold designers can be used. Baidu Encyclopedia - Bending Expansion Factor