When designing a sheet metal part using the extruded wall feature, do you always have to add fillets to represent the bends can you define a default bend radius somewhere and have the system add them to sharp corners you sketch?
"SR" wrote in message news: snipped-for-privacy@posting.google.com... : When designing a sheet metal part using the extruded wall feature, do : you always have to add fillets to represent the bends or can you define a : default bend radius somewhere and have the system add them to sharp : corners you sketch?
In sheetmetal, when you've done 'Feat>Create>Sheetmetal>Wall' and gotten to the Options menu where you can select Extruded, you'll notice at the bottom of the menu some choices. If you wish to generate you own radiuses by sketching the radius or later creating rounds on corners, pick 'No Radius'. If you wish to have the program generate the radiuses at the corner (and figure developed length), pick the 'Use Radius' option. Subsequently, you'll be asked to decide whether you're specifying the dimension of the inside or outside radius and, after creating the sketch for the extruded wall, you'll be given some two defaults for specifying radius plus the option to enter a value. The two defaults are Thickness or 2*Thickness; these act in conjunction with your inside/outside radius choice. So, for example, if you'd said outside radius and picked thickness, the inside radius would be zero. Or, if you'd picked inside radius and said thickness, on a one millimeter thick part, the inside radius would be a millimeter and the outside radius would be two times stock thickness.
One last hint about sheetmetal design with Pro/SHEETMETAL and this is something I had to figure out for myself as I've seen it documented nowhere. Most sheetmetal design builds from either the outside in or the inside out. Many enclosures that have to fit in fairly tight spaces build from the outside dimensions of the part. Electronic component RF shielding OTOH form themselves tightly around the component, making inside dimensions of the 'box' critical. How do you design this way with extruded or flat wall in Pro/e? Both types ask for an attachment edge and sketching planes. In the case of the extruded wall, you are just sketching a line to represent an angle to another wall and a length. Thickness will be added. But, will it be added to t he inside or outside? If you sketch the line away from the part (e.g., pick the top edge and sketch up or bottom edge and sketch down), you have sketched the inside of the wall and thickness will be added tothe outside. If you do the opposite, pick teh top edge and sketch down, across the thickness of the part, you have sketched the outside of the wall and thickness will be added to the inside. The same applies to flat, secondary walls. Also, radiusing will work into the part. Much grief will be saved by remembering this.
David Janes
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