D.Minnich
Cast Iron
- Joined
- Mar 30, 2021
- Location
- Cleveland area
Hello,
On draw dies, I was taught that when designing a cup draw strip with anything under a 40% draw, a ‘dog bone’ type strip design should be used, and that if it is over 40% it should be designed as an ‘onion cut’ (lanced) type strip (Some call it a cookie cut), & if it is really thick material or the draw depth is equal to or deeper than 2x the cup diameter. Then you should design using a stretch web type strip design. My question is:
A: Is this accurate
B: If so, how thick does material have to be to justify switching to the stretch web type carrier?
On draw dies, I was taught that when designing a cup draw strip with anything under a 40% draw, a ‘dog bone’ type strip design should be used, and that if it is over 40% it should be designed as an ‘onion cut’ (lanced) type strip (Some call it a cookie cut), & if it is really thick material or the draw depth is equal to or deeper than 2x the cup diameter. Then you should design using a stretch web type strip design. My question is:
A: Is this accurate
B: If so, how thick does material have to be to justify switching to the stretch web type carrier?