Diagram 1. double-lance (4 carriers) |
This method enable carriers to be long. But when carriers
are too long the
remainder becomes is pushed under the original material at point A. Then it
becomes impossible to control bottom dead center. |
Diagram 2. double-rance (6 carriers) |
This method is used when carrier's length is too short for 8 carriers. |
Diagram 3. double-rance (8 carriers) |
Following this method produces the
best stability for the work-piece. |
Rance slits are at risk of suffering carrier wrinkling
It is better to use hourglass forming when the |
Diagram 4. hourglass-forming (2 carriers) |
This method can alter the material width. |
Diagram 5. hourglass-forming (4 carriers)rabbit's ears |
This method is used when constriction of the blank is a little. |
Diagram 6. hourglass-forming(4 carriers)frog's legs |
This method is used when constriction of the blank is not a little. |
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