This section is from the book "Machines And Tools Employed In The Working Of Sheet Metals", by R. B. Hodgson. Also available from Amazon: Machines and tools employed in the working of sheet metals.
Blank .995 diameter by .05 thickness. | Cupping. 1st process. | 1st re-draw. 2nd process. | 2nd re-draw. 3rd process. | Heading. 4th process. |
Outside diameter of shell.................................... | •593 | •498 | •407 | •410 |
Inside diameter of shell.......................................... | .496 | •407 | •221 | •322 |
Reduction in shell thickness............................... | •0015 | •003 | •0025 | nil |
Length in shell thickness.............................. | •387 | •490 | •630 | •493 |
Thickness of shell.............................................. | •0485 | •0455 | •043 | •044 |
Blank .613 in diameter by .051 in thickness. | Cupping. 1st process. | Extension. 2nd process. | Extension. 3rd process. | Extension. 4 th process. | Extension. 5th process. |
Outside diameter of shell | •415 | •368 | •335 | •313 | •293 |
Inside diameter of shell | •341 | •324 | •299 | •285 | •269 |
Thickness of metal in shell | •037 | •022 | •018 | •014 | •012 |
Reduction in thickness of metal in shell | •014 | •015 | •004 | •004 | •002 |
Length of shell | •275 | •501 | •604 | •902 | 1.028 |
Reduction in outside diameter | .. | •047 | •033 | •022 | •02 |
Difference in outside and inside diameter | •074 | •044 | •036 | •028 | •024 |
Increase in length of shell at each process | •• | •226 | •103 | •298 | •126 |
 
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