Calculate the length of developed blank, Mechanical Engineering

Calculate the Length of Developed Blank

Part shown in Figure is to be produced from flat sheet by bending operation. Calculate the length of the developed blank. Assume k = 0.3.

928_Calculate the Length of Developed Blank.png

                                        Figure

 

Solution

Reference to Figure 15.5 the part is a case of straight Bend with the following parameters :

Bend Angle  : 90 degree Bend Radius : 5 mm Lengths        

L1 : 20 mm

L2 : 15 mm

Bend Allowance = θ (r + kt)

BA = ∏ /2  (5 + 0.3 × 2)

= 8.796 mm

Bend Compensation = - BA

BC = - 8.796 mm

Blank Length = L1 + L2 - BC

= 20 + 15 - (- 8.796)

=  43.796 mm.

 

Posted Date: 12/26/2012 7:05:58 AM | Location : United States







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