How do i calculate the sheet metal size required for the bend I need?

Please refer the image attached. In this I need a bend like shown but the dimensions seems to be odd. The length is correct. the total sheet metal width seems doubtful. please make me understand how to find the width of sheet metal required for the bend.

Answer
 
Comments 0

5 Answers

This is what I get but it all depends on many factors, material, tooling machine etc.

 
Comments 0

The dimensions given are the outsides of the bends. As the dimensions for the blank pattern are the insides of the bends the thickness of the metal stock is a consideration when positioning these bend lines and the actual size of the required blank. With the 3D model sheet metal approach if the material setting are correct the flattened pattern will be right. In the pre 3D modelling era the engineer was required to manually calculate the blank size using the material thickness and an allowance for the bend radius. If you wish to know more about this, read a few books from the sheet metal trade. As I started my career in the pre-computer days, this and many other aspects of the engineering - manufacture required knowledge base was quickly learned

 
Comments 0

it's 1.2mm thick
written on that image only

 
Comments 0

Its correct.. this is how you find out..166-(2*1.2*2)=161

 
Comments 0

hi dear,
simple formula is there ( Thickness of material X 1.75 per bend X no of bend) e.g. - 1.2X1.75X2 = 4.2.
now total of dimension ( 126+30+10)-4.8 = 161.8 mm

 
Comments 0