Determining the bend angle for the sheet metal mold

[EmreYucel34]

I am planning to make a bending mold for the helix with this size. How should I follow a way to find out at what angle the leaf is bent. I need mold blades at the bending angle of the helix leaf.I also can't see the angle of the sheet metal in the technical drawing

[kacper.suchomski]

Hi

I'm not sure if your question is correct - for several reasons:

1. You can calculate the helical angle trigonometrically based on the pitch and the circumference of the projected circle (Pi*D).
   And you will get 2 different results - one for the inside diameter and one for the outside diameter.
   That's brutal math. At each depth the angle of inclination will be different.
2. Another issue is the direction of bending.
   Check the outside diameter of the flat pattern - it is larger than the outside diameter of the product.
   This may seem counterintuitive, but pressure in the direction of the axis alone does not solve the problem - in the forming process the material will also be twisted and bent in the direction of the central axis.

To design a formwork, you can simply open the Injection Mold environment and use the tools for (semi-)automatic nest modeling. You don't need measurements for this.

You can also use multi-body modeling (or derived parts) and use logical operations to imprint geometry into the nest in the formwork.

But in my opinion, the first step should be to determine the technological feasibility of this element and take into account all the phenomena that will occur, not only the material shift (this can be done with a mold/die), but taking into account a larger number of factors will force the tool to become more complex.

In any case, the question about the angle is not a problem, and if you need it for another program just calculate it on the calculator.

[johnsonshiue]

Hi! This one is tricky. Inventor does not support unfolding helical sweep body. You will need to use a different tool.

Many thanks!