上泽充大￥ Involute profiles SHANCHAI HAD TONG UNVERSIY How involute profile constructed? What are its geometric properties? K A BK-AB B Base circle ⑧ 上泽充夏大粤 Involute profiles How involute profile constructed? What are its geometric properties? K2 B are instant centers and curvature centers of Ki Normal line of K is tangent B2 to base circle11 Involute profiles How involute profile constructed? What are its geometric properties? NO1 B Base circle K A Involute profiles How involute profile constructed? What are its geometric properties? NO2 Bi are instant centers and curvature centers of Ki Normal line of Ki is tangent to base circle