Research on Vibration Tapping of Hardened Steel |
| Journal |
Key Engineering Materials (Volumes 315 - 316) |
| Volume |
Advances in Machining & Manufacturing Technology VIII |
| Edited by |
Zhejun Yuan, Xipeng Xu, Dunwen Zuo, Julong Yuan and Yingxue Yao |
| Pages |
51-55 |
| DOI |
10.4028/www.scientific.net/KEM.315-316.51 |
| Online since |
July, 2006 |
| Authors |
R.D. Han,
B.L. Yin
|
| Keywords |
Hardened Steel, Tap Life, Tapping Torque, Torsional Rigidity, Vibration Tapping |
| Abstract |
As high-speed steel tap is incapable of small-hole tapping (M3) in hardened steel, vibration
tapping is introduced in this paper to solve this problem. Theoretic analysis with fracture mechanics
indicates that the impact effect of the tap on the workpiece results in extended micro cracks and a
much lower tapping torque. And the torsional rigidity of the tap is enforced in vibration tapping as
proved by dynamic analysis. The experimental results show that with well chosen amplitudes, tapping
torque decreases as vibration frequency increases and increases with the increase of net cutting time
ratio, with the latter being the more significant influencing factor. In vibration tapping of hardened
steel, 24 threads can be machined with a single tap. Vibration tapping is then proved to be a practical
solution to the problem of small-hole tapping in hardened steel. |
| Full Paper |
Get the full paper by clicking here
|
| Preview |
Free first page example |
