Orientation

Shape orientation, its position relative to the roll axis, is to be considered as an important element of roll design.  It can affect machine cost, tool cost, part quality and also the overall efficiency of the operation.  A particular orientation may receive preference because of:

1. The limitations of the forming machine as to the number of roll stages and roll diameter.
2. The limitations of the cutoff machine as to the die space and stroke.
3. A desire to retain the finished or exposed surface of the section in a position visible to the operator as it is being formed.
4. A desire to position the cutoff burr in a particular direction.
5. A desire to tool similar sections in “combination” or “sectioned” rolls.
6. A desire to minimize, control or eliminate:
   1. Scratching and galling
   2. Blind bends
   3. Trapped coolant
   4. Springback
7. The requirement of other in-line operations, e.g., coiling, prepunching, postpunching.
8. Tool cost economies or ease of setup and operation.
9. The need to position a laminated section most conveniently for the application of the core of cover strips involved.