Gullco KBM-28 User Manual download pdf (Page 31)

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.

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Gullco KBM-28 User Manual Page 31