A
thread is completely rolled in the same time it takes to make one
pass with a single point tool. That is a 90% (or more) reduction
in cycle time!
A rolled thread is more precise and consistent than a cut thread,
eliminating the need to closely monitor thread making production.
By eliminating the need for constant size adjustments, set-up and
down time costs are reduced, resulting in a significant cost savings.
On a cost per piece basis, thread rolls cost less than carbide inserts.
Furthermore, the non-abrasive characteristics of the thread rolling
process results in less wear to the component part, thus increasing
tool life.
The inherent tensile strength and fatigue strength under reversed
bending stresses are basic to the uninterrupted structure.
The burnished thread surface, with a roughness level of below 32 micro,
improves resistance to corrosion and reduces abrasion within the thread.
Because minimal abrasion occurs when thread rolling, profile accuracy
increases.
The work hardened flank provides increased surface tensile, yield,
and shear strength. Due to pressure deformation, a residual compressive
stress system builds up at the thread root, which counter-acts tensile
loading. When compared to a cut thread, the load capacity of the rolled
thread is increased by 5-15%.
Cold Forming plastically and permanently displaces the component material
instead of cutting away material. |
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