Knowledge check (8 of 8)
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Lesson 03·Cavity design
Cavity design and stress concentration: radii, draft, flash land, gates
Where forge dies actually crack and the geometric rules that move the failure point: minimum radii at stressed corners, draft angles by cavity depth, flash land and gutter dimensions, and gate placement that does not dump metal into a corner.
8 min readLesson 3 of 13
Knowledge check
An H13 closed-die forge cavity has a print callout of R 1.5 mm on the internal corner at the base of a 25 mm rib. The first die out of the shop cracks at the base of that rib by hit 4,000. The shop wants to blame heat treat. What is the more likely cause and what changes do you make on rev B?