Calculation method of internal size plus bending coefficient;
When the R angle in bending is less than or equal to the thickness of the material, it is expanded at an acute angle, and the expansion formula is:
22+56+0.8+56+0.8+22+0.8 =158.4 (the dimensions of 22 and 56 are the shape minus the material thickness).
The bending coefficient is the length of the plate after bending. Different materials, different thickness plates and different bending dies have different bending coefficients.
Extended data:
Calculation of bending expansion size by stamping expansion coefficient in bending expansion diagram;
A: length of straight side (A 1 and A2 on both sides of A2) R: size of R when bending T: material thickness P: expansion coefficient W when bending: bending angle π of internal R: 3.1416.
Then: the expanded length after expansion is l = a1+a2+w/360 * 2 * 3.1416 * r * p.
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Baidu encyclopedia-bending expansion coefficient
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