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SolidWorks Tips & Tricks sponsored by AboutSolidWorks.com
The Corner Trim command is a great tool for preparing your sheet metal parts for manufacturing; however, it does not allow you to see the results in the 3D model. A simple work around is to use the Unfold command to flatten the bends in the corner you are concerned with and then apply an extruded cut to remove the material. Then, Fold the flanges back up and check out the results. Let’s try it! Open SolidWorks and create a simple box with four sides using the Base-Flange and Edge Flange sheet metal commands. Next pick the Unfold icon. Pick the base flange as the fixed face and use the Collect All Bends button to select the bend areas. Click OK to unfold the box. Zoom into one of the corners and take a close look. At this point it shows the V style of corner relief. But this is not the relief we want. Our plan is to use a ¼” punch to provide the relief. So, pick the Extruded Cut icon and sketch a rectangle over the corner. Dimension it, 0.25 horizontally and 0.25 vertically. Now, to locate the square pick the two edges of the V and then pick the Convert Entities icon. Pick the two edges again and check the box labeled For construction. Create a horizontal construction line through the midpoint of the one edge of the V and a vertical construction line through the midpoint of the other edge of the V. Make certain that you get the midpoint relations here.
Next select the midpoint of one side of the square and the construction line which intersects it. Create a Coincident relation. Then do the same with the other construction line. This ties the square to the center of the bend areas. Exit the sketch. In the Cut Extrude PropertyManager, check the Link to thickness box and click OK. Time to refold the part. Click the Fold icon. Then, pick the Collect all bends button and fold the part. Now look at the 3D model in the corner you modified. You can see the notch you created. Too big? Change the dimensions of the square, but remember you need to use a standard size punch for manufacturing.
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