Die hole configurations
Tapered entry die: A type of entry more often in large hole dies (greater than 10 mm).
The taper consists of reamer angle and reamer depth. Reamer angles vary while the
taper depth is usually from 20 to 50 mm. Generally, tapers are not severe angles and
are used to moderately increase compression. Well dies are used for greater
compression requirements.
Well die: A type of hole entry in large hole dies (greater than 12 mm in diameter).
The hole entry is substantially larger than the actual hole size. Hole depth is
predetermined based on hole diameter. Well dies offer greater versatility to handle
variations in feedstock.
Well die-tapered bottom: The well has a slight taper at the bottom leading to the true
hole size. The taper is a transition between the well and hole.
Well die-flat bottom: The well in this die has a flat bottom and there is no taper
transition. Maximum compression is obtained with this die.
Straight relief: The relief in the die is uniform across the die to obtain the desired
effective thickness.
Variable relief: The outside two or three rows are lowered about 1 cm, thus reducing
the effective thickness of these holes. The purpose is to improve material flow
through these outer holes.
w
đang được dịch, vui lòng đợi..