ASME International
0022-0817
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Các bài báo tiêu biểu
The Dynamics of Rotor-Bearing Systems Using Finite ElementsA procedure is presented for dynamic modeling of rotor-bearing systems which consist of rigid disks, distributed parameter finite rotor elements, and discrete bearings. The formulation is presented in both a fixed and rotating frame of reference. A finite element model including the effects of rotatory inertia, gyroscopic moments, and axial load is developed using the consistent matrix app... ...
Tập 98 Số 2 - Trang 593-600 - 1976
Theory of Self-Excited Machine-Tool Chatter: Contribution to Machine-Tool Chatter Research—1Self-excited chatter, an instability of the cutting process in combination with the machine structure, is a basic performance limitation of a machine tool. A theory is developed which permits calculation of borderlines of stability for a structure having n-degrees of freedom and assuming no dynamics in the cutting process. Harmonic solutions of the system characteristic equation are found ... ...
Tập 87 Số 4 - Trang 447-454 - 1965
Mechanism of Cutting Force and Surface Generation in Dynamic MillingAn improved model of the milling process is presented. The model proposes a method of determining cutting forces in five distinct regions where the cutting edge travels during dynamic milling. Trochoidal motion of the milling cutter is used in determining uncut chip thickness. The kinematics of the cutter and workpiece vibrations are modelled, which identifies the orientation and velocity ... ...
Tập 113 Số 2 - Trang 160-168 - 1991
The Prediction of Surface Accuracy in End MillingIn 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... ...
Tập 104 Số 3 - Trang 272-278 - 1982
Effect of a Time-Dependent Stenosis on Flow Through a TubeA common occurrence in the arterial system is the narrowing of arteries due to the development of atherosclerotic plaques or other types of abnormal tissue development. As these growths project into the lumen of the artery, the flow is disturbed and there develops a potential coupling between the growth and the blood flow through the artery. A discussion of the various possible consequence... ...
Tập 90 Số 2 - Trang 248-254 - 1968
Dynamic Analysis of Mechanical Systems With Clearances—Part 1: Formation of Dynamic ModelA mathematical model of an elastic mechanical joint with clearances has been formulated and the dynamical equations of motion derived (Part I). The model, which we have called an Impact Pair, is basic to the determination of the dynamical response of mechanical and electromechanical systems with clearances, including determination of dynamic force amplification, frequency response, time-di... ...
Tập 93 Số 1 - Trang 305-309 - 1971
New Developments in the Theory of the Metal-Cutting Process: Part I. The Ploughing Process in Metal CuttingRevelation 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... ...
Tập 82 Số 4 - Trang 348-357 - 1960
Prediction of Cutting Forces and Tool Breakage in Milling from Feed Drive Current MeasurementsThis 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... ...
Tập 114 Số 4 - Trang 386-392 - 1992
Fixture Failure Diagnosis for Autobody Assembly Using Pattern RecognitionIn this paper, a fault diagnostic method is proposed for autobody assembly fixtures. This method uses measurement data to detect and isolate dimensional faults of part caused by fixture. The proposed method includes a predetermined variation pattern model and a fault mapping procedure. The variation pattern model is based on CAD information about the fixture geometry and location of the me... ...
Tập 118 Số 1 - Trang 55-66 - 1996
Some Applications of Graph Theory to the Structural Analysis of MechanismsConcepts in graph theory, which have been described elsewhere [2, 4, 6] have been applied to the development of (a) a computerized method for determining structural identity (isomorphism) between kinematic chains, (b) a method for the automatic sketching of the graph of a mechanism defined by its incidence matrix, and (c) the systematic enumeration of general, single-loop constrained spati... ...
Tập 89 Số 1 - Trang 153-158 - 1967