ASME International

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A Study of the Normal and Shear Stresses on a Cutting Tool
ASME International - Tập 88 Số 1 - Trang 51-61 - 1966
T. C. Hsu
This paper contains an explanation for the variation of the “coefficient of friction” in metal cutting. The chip partly sticks to and partly slides over the tool and only in the latter region can friction occur. In the experiments, the contact area between the chip and the tool is controlled and the change in the size of the sticking region is observed. The ploughing force acting on the to...... hiện toàn bộ
New Developments in the Theory of the Metal-Cutting Process: Part I. The Ploughing Process in Metal Cutting
ASME International - Tập 82 Số 4 - Trang 348-357 - 1960
P. Albrecht
Revelation of the significance of “ploughing” in the metal-cutting process, which occurs because of the finite sharpness of the cutting edge, leads to a better understanding of the mechanics of the metal-cutting process. The concept of the ploughing force on the extreme cutting edge allows the development of a more complete force diagram which separates the ploughing force from the chip-to...... hiện toàn bộ
A Study of Metal Flow Ahead of Tool Face With Large Negative Rake Angle
ASME International - Tập 104 Số 3 - Trang 319-325 - 1982
Yosuke Kita, Mamoru Ido, Naomichi Kawasaki
Although the chip formation mechanism by a tool having a large negative rake angle is not well known, it is very important to make the process clear in order to get high quality in finished surfaces. In this paper, the behavior of material ahead of a tool face with a large negative rake angle is examined by means of low speed machining on lead. The deformation process of the material is in...... hiện toàn bộ
New Development in the Theory of the Metal-Cutting Process: Part II—The Theory of Chip Formation
ASME International - Tập 83 Số 4 - Trang 557-568 - 1961
P. Albrecht
Introduction of the concept of ploughing into the metal-cutting process lead to the abandoning of the assumption of collinearity of the resultant force on tool face and on the shear plane. With this understanding the tool face force is found to produce a bending effect causing bending stresses in the shear zone. Study of the chip formation mechanism when varying cutting speed showed that i...... hiện toàn bộ
A Dual-Mechanism Approach to the Prediction of Machining Forces, Part 1: Model Development
ASME International - Tập 117 Số 4 - Trang 526-533 - 1995
William J. Endres, Richard E. DeVor, Shiv G. Kapoor
A cutting-process model addressing the chip removal and edge ploughing mechanisms separately yet simultaneously is presented. The model is developed such that it is readily applicable in an industrial setting, its coefficients have physical meaning, and it can be calibrated with a concise quantity of orthogonal cutting data. The total cutting and thrust forces are each the summation of its...... hiện toàn bộ
The Prediction of Surface Accuracy in End Milling
ASME International - Tập 104 Số 3 - Trang 272-278 - 1982
William Kline, Richard E. DeVor, Iqbal Shareef
In the end milling process, the cutting forces during machining produce deflection of the cutter and workpiece which result in dimensional inaccuracies or surface error on the finished component. A previously developed mathematical model for the cutting force system in end milling is combined with models for cutter deflection and workpiece deflection so that the surface error profile may b...... hiện toàn bộ
Size Effect in Metal-Cutting Force
ASME International - Tập 90 Số 1 - Trang 119-126 - 1968
Keisuke Nakayama, Kiyoshi Tamura
Tool Edge Roundness and Stable Build-Up Formation in Finish Machining
ASME International - Tập 96 Số 4 - Trang 1258-1267 - 1974
M.Es. Abdelmoneim, R. F. Scrutton
The results of cutting force measurements when machining materials which do not form a sizable unstable built-up-edge are compared with the results of a theoretical analysis. This analysis, based partly on the use of circular cylindrical surfaces of velocity discontinuity around the base of the tool, yields specific energy values which are uniquely determined by the value of the undeformed...... hiện toàn bộ
Prediction of Cutting Forces and Tool Breakage in Milling from Feed Drive Current Measurements
ASME International - Tập 114 Số 4 - Trang 386-392 - 1992
Yusuf Altintaş
This paper describes the use of current drawn by feed drive motors for milling process monitoring. A model of a vertical milling machine feed drive control system is used to analyze cutting force measurements from the drive motors. The current and voltage limits in the amplifier, and the friction in the feed drive assembly are included in the analysis. The viability of using armature curre...... hiện toàn bộ
Deformation Modes and Lip Fracture During Hole Flanging of Circular Plates of Anisotropic Materials
ASME International - Tập 99 Số 3 - Trang 738-748 - 1977
W.S. Johnson, N.R. Chitkara, Huy Van Minh
An experimental investigation was carried out to determine the deformation leading to failure of the hole periphery in the hole flanging process using a conical punch. Circular plates of various hole sizes and of different materials were tested to different depths of punch penetration and the lip strain paths as well as the variation of thickness around the periphery of the lip were studie...... hiện toàn bộ
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