Abstract
Gear precision measurement was carried out for gear with tooth number z=17, gear module mn=0.5, tooth width b=10mm, spur gear design and made using JIS C 3604 brass material. Cutting force measurement was carried out for gear with z=30, mn=1.75, spur gear, and JIS C 3604 brass material. Main results are as follows: (1) Gear precision and cutting force was almost the same in both dry and wet cutting. (2) Process capability index Cp of tooth profile errors were almost the same in both dry and wet hobbing gear cutting, and 5.9 to 8.1. Cp of tooth lead errors was 5.8 to 10.7. It was concluded that dry hobbing gear cutting of brass material has a sufficient production capacity. (3) Almost the same gear precision in both dry and wet hobbing gear cutting was considered because cutting forces were also same.
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