College of Engineering;
China Agricultural University;
Beijing 100083;
P.R.China;
Key Laboratory of Optimal Design of Modern Agricultural Equipment in Beijing;
China Agricultural University;
Beijing 100083;
P.R.China;
Beijing Kuiente Technology Co;
Ltd;
Beijing 100043;
P.R.China;
hourglass; worm; gear; hob; cylindrical; generating; surface; spiral; flute; rake; face; rake; angle;