1, sheet metal chassis shell must be quite reasonable way to unfold, pay attention to saving materials as well as its processability;
2, the choice of gap and edge way should be prudent and reasonable, T = 2.0 or less, the gap is 0.2; T = 2-3 between the gap of 0.5; edge way should be used to wrap the long side of the short side of the way (i.e., the door class)
3, tolerance External dimensions: responsible for going to the end, the positive difference in half; hole size: go to the end of the difference, the negative difference in half;
4, the direction of the burr
5, tearing, riveting, extraction of teeth, punching the bumps (packages) and other positional directions, draw a sectional view;
6, check the material, the thickness of the plate, as well as the plate thickness tolerance;
7, pay attention to the special angle, the bending angle inner radius (i.e., the door category). Bending angle radius (generally R = 0/5) to try to fold and determine its expansion;
8, there are prone to error (such as similar asymmetric places) should be focused on;
9, the size of the place should be added to the enlargement of the picture;
10, need to be protected by spraying should be expressed;