(i) It is always desirable to keep the thickness of a web at the minimum, within practical limns. (ii) Avoid thin-ledged ribs and small fillet radii.Ī web is a thin part of the forging that is passing through or parallel to the forging plane.įollowing are the design considerations for webs: (i) It is recommended to keep the height-to-thickness ratio of a rib below 6, and preferably at 4. 5.29 (c).Ī rib is a thin part of the forging that is normal to the forging plane.įollowing are the design considerations regarding the ribs: (v) Another recommended method for providing the draft, is to provide greater draft on the shallower die cavity. Therefore, eliminating any draft on the surfaces. (iv) Sometimes, changing the orientation of the die cavity may result in natural draft. (iii) Try to make use of the natural draft inherent in some shapes, such as conical and curved surfaces, when designing the forged product. This is justified as outer surface will shrink away from the surface of the die cavity as a result of the part’s colling down, and hence provide easy removal of the forging. (ii) It is also recommended to apply a smaller draft angle on the outside periphery than on the inside one.
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