ASME International

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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
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
Size Effect in Metal-Cutting Force
ASME International - Tập 90 Số 1 - Trang 119-126 - 1968
Keisuke Nakayama, Kiyoshi Tamura
Experiments on Adaptive Control of a Milling Machine
ASME International - Tập 98 Số 1 - Trang 239-245 - 1976
R. Bedini, G. G. Lisini, Paolo Pinotti
The paper describes a theoretical and experimental research on adaptive control of the metal-cutting process. Results of experiments performed in various cutting conditions on a milling machine connected to a process computer acting as adaptive controller are reported. The behavior of the adaptive control system in stationary and transient conditions and in presence of air gaps has been te...... hiện toàn bộ
Model Reference Adaptive Force Control in Milling
ASME International - Tập 111 Số 1 - Trang 13-21 - 1989
Leal K. Lauderbaugh, A. Galip Ulsoy
This paper describes the design and implementation of a Model Reference Adaptive Controller (MRAC) for force control in milling. First, previous work in this area is discussed. Results from previous work on the performance of fixed gain process controllers is summarized. The design of an MRAC for force control in milling is described, including a discussion of the implementation issues of ...... hiện toàn bộ
Analysis of Transients in an Adaptive Control Servomechanism for Milling With Constant Force
ASME International - Tập 99 Số 3 - Trang 766-772 - 1977
J. Tlusty, M.A. Elbestawi
Characteristics of a reasonably well-adjusted NC servo are given as measured as well as modeled. A model of an A/C loop is added and investigated for stability and for a transient in meeting a sudden increase of depth of cut. Both the classical approach and a numerical simulation (state-space approach) are used. The important effect on stability is shown of a time delay between table veloc...... hiện toàn bộ
Effective Elastic Constants for the Bending of Thin Perforated Plates With Triangular and Square Penetration Patterns
ASME International - Tập 95 Số 1 - Trang 121-128 - 1973
W. J. O’Donnell
Bending tests were run on a series of aluminum beam specimens perforated in triangular and square arrays. Progressively thinner specimens were tested down to 1/8 the thickness covered by the ASME Code. The results for the thick specimens show good agreement with the theoretical generalized plane strain values. The trend of the results with decreasing thickness agrees with the theoretical v...... hiện toàn bộ
A Knowledge-Based Diagnostic Approach for the Launch of the Auto-Body Assembly Process
ASME International - Tập 116 Số 4 - Trang 491-499 - 1994
Dariusz Ceglarek, Jianjun Shi, Shaocheng Wu
This paper is the first attempt to implement a knowledge-based diagnostic approach for the auto-body assembly process launch. This approach enables quick detection and localization of assembly process faults based on in-line dimensional measurements. The proposed approach includes an auto-body assembly knowledge representation and a diagnostic reasoning mechanism. The knowledge representat...... hiện toàn bộ
Further Developments in Applying the Finite Element Method to the Calculation of Temperature Distributions in Machining and Comparisons With Experiment
ASME International - Tập 105 Số 3 - Trang 149-154 - 1983
M.G. Stevenson, Paul Wright, J. G. Chow
The finite element program developed in previous work [1] for calculating the temperature distributions in the chip and tool in metal machining has been extended in its range of application. Specifically, the program no longer needs a flow field as input and it can accommodate a wide range of shear angle and contact lengths. An important feature of this paper is that temperature fields fro...... hiện toàn bộ
Measurement of Temperature Distribution Within Tool Using Powders of Constant Melting Point
ASME International - Tập 98 Số 2 - Trang 607-613 - 1976
S. Kato, Koji Yamaguchi, Yoichi Watanabe, Yasuyuki Hiraiwa
A method was developed to measure tool temperature distribution within the tool by means of fine powders that have a constant melting point. The method involves observation of the boundary line formed by melted and unmelted powder scattered on the tool surface. It is clarified that temperature distribution within the tool is easily and accurately measured in this manner. Temperature distri...... hiện toàn bộ
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