Is flatten view must when making a drawing for sheet metal part? Because in this drawing there is no flatten view.
Solidworks tutorial | Sketch Power box chassis (Sheet metal) - YouTube
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Is flatten view must when making a drawing for sheet metal part? Because in this drawing there is no flatten view.
Solidworks tutorial | Sketch Power box chassis (Sheet metal) - YouTube
Time 0.50
If Sheet Metal part is intended for manufacturing I think so two views are enough 1)isometric view and 2)flatten view. What is in common place?
Maha Nadarasa wrote:
If Sheet Metal part is intended for manufacturing I think so two views are enough 1)isometric view and 2)flatten view. What is in common place?
No.
The customer (contract) pays for the dimensions of the finished folded model.
Because of bend allowance (material stretches on outside of bend and compresses on inside of bend) the flat pattern could be considered "reference" geometry - not the contract geometry.
Bend allowance can depend on material, bend radius, bend angle, thickness and the machine tooling used.
We never use a flattened view because different suppliers use different methods and "K" factors to manufacture the sheet metal piece. What we show on the drawing is enough views to properly define the piece because in the end, that's what we're buying.
Steve C
I work at a shop where your place of employment sends stuff to, a job shop. I redraw your drawings with the proper K factors we use for production of the part. This is the way, I myself send a drawing to my guys out in the shop. Because we are a "metal fabrication shop" the press brake guys ask for as much detail on a drawing as possible to ensure the part made as close to the customers specifactions as possible.
Depends on the vendor (if known) some vendors/ fabricators prefer to calculate the bend tolerances themselves to suit their machinery, making your lay-flat redundant. If you supply a lay-flat, then you're responsible for the outcome/revisions. If you supply the formed part, the vendor is more likely to do the work to deliver the formed part you specified.
For manufacturing of the part I would say yes. In the flatten state it shows the proper locations of the bend lines for the press brake operators to accurately achieve your part.