Gullco KBM-28 - Manual (Page 31)

27
FORCES ACTING ON THE CUTTER
The rotary shearing cutter on the KBM
®
-28 Portable Plate Edge Bevelling Machine is subjected to
considerable stress under load. The drawings above outline the dynamic forces that may be
applied to a cutter in operation.
F1 = Cutter rotation shearing force.
F2 = Material feeding force generated by the cutter serrations.
P1 = Material pulling force generated by F1 and F2 as the material is drawn against the cutter
during operation.
P2 = External force pulling material away from the cutter.
P3 = Downward moment onto material.
P4 = Upward moment onto material.
P5 = External force interfering with feeding force F2.
P6 = Poor Main Roller rotation.
L1 = Material extension from the cutter.
The cutter rotation F1, material feeding force F2 and the material pulling force to the cutter P1 are
generated by the KBM
®
-28 machine itself. Under normal circumstances and correct operating
procedures, the machine is capable of withstanding these self generated forces. There are,
however, a number of factors that will cause the cutter to break, as described in the following
section.