3 Results and discussion
3.1 Overall comparison of saw blades on corn stalk
cutting parameters
The relationship between cutting force and displacement
is shown in Fig. 14. The cutting force rapidly
increased using traditional saw blade during the displacement
from zero to 15 mm. Then the force decreased
rapidly and maintained a vibration state which lasted
until almost the cutting process finished. The force
swiftly increased again when near to the end of cutting
process, and it reached the maximum then rapidly
dropped to zero. While the cutting force using bionic
saw blade increased slowly and the vibration state lasted
to the end of cutting. The maximum forces using two
types of saw blades to cut corn stalk are different. The
maximum forces in the 12 experiments were recorded in
Table 1.
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