Paper Title:
Study on Micro Drilling — Rotating Bending Fatigue of Micro Carbide Drills
  Abstract

In micro drilling, the run-out of drill due to rotational motion error of spindle or eccentric chucking of drill causes machining error and larger radial forces which may break the drill. Furthermore, because the spindle speed is very high, rotating bending fatigue of drill may dominate the tool life. In the previous work, relationship between bending deflection and radial cutting force, and fatigue fracture of drill were investigated theoretically and experimentally. The objective of this paper is to investigate more in detail the relationship between the radial cutting force/deflection of drill and its fatigue life. A series of pseudo rotating bending fatigue tests was performed by using three types of ultrafine grain carbide drill blank with 0.1mm diameter. The main results obtained are as follows, (1) Rotating bending fatigue curve did not depend on cobalt content and tungsten carbide grain size. This differs from the results of conventional cemented carbides. (2) The fatigue fracture surface was dominantly occupied by fast fracture regions.

  Info
Periodical
Key Engineering Materials (Volumes 407-408)
Edited by
Fan Rui, Qiao Lihong, Chen Huawei, Ochi Akio, Usuki Hiroshi and Sekiya Katsuhiko
Pages
45-48
DOI
10.4028/www.scientific.net/KEM.407-408.45
Citation
B. X. Ma, M. Nomura, T. Kawashima, T. Shibata, Y. Murakami, M. Masuda, O. Horiuchi, "Study on Micro Drilling — Rotating Bending Fatigue of Micro Carbide Drills", Key Engineering Materials, Vols. 407-408, pp. 45-48, 2009
Online since
February 2009
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: You Tang Li, Ping Ma, Chang Feng Yan, Fu Yuan Lang
Abstract:Safety designs and fracture designs are the two important fields of crack theory. The fracture problems of middle carbon steel under...
1153
Authors: Ryosuke Matsui, Hisaaki Tobushi, Yoshiyasu Makino
Abstract:In this study, we performed the bending fatigue test and investigated the influence of strain ratio on fatigue life in TiNi shape memory...
1193
Authors: Dal Woo Jung, Nak Sam Choi
Abstract:Fatigue fracture behavior of a hybrid joint part for the tilting car body was evaluated in comparison to the case of static fracture. The...
2860
Authors: Wu Zhao, De Jie Chen
Abstract:Fatigue failure is the most common failure mode of boring bar in the deep-hole boring processing system. For solving the problem of fatigue...
2264