ASME International
0022-0817
Cơ quản chủ quản: N/A
Các bài báo tiêu biểu
The Dynamics of Rotor-Bearing Systems Using Finite Elements
Tập 98 Số 2 - Trang 593-600 - 1976
A 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 approach. A...
Theory of Self-Excited Machine-Tool Chatter: Contribution to Machine-Tool Chatter Research—1
Tập 87 Số 4 - Trang 447-454 - 1965
Self-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
using a ...
Mechanism of Cutting Force and Surface Generation in Dynamic Milling
Tập 113 Số 2 - Trang 160-168 - 1991
An 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
directio...
The Prediction of Surface Accuracy in End Milling
Tập 104 Số 3 - Trang 272-278 - 1982
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
be predic...
Effect of a Time-Dependent Stenosis on Flow Through a Tube
Tập 90 Số 2 - Trang 248-254 - 1968
A 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 consequences
of thi...
Dynamic Analysis of Mechanical Systems With Clearances—Part 1: Formation of Dynamic Model
Tập 93 Số 1 - Trang 305-309 - 1971
A 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-displaceme...
New Developments in the Theory of the Metal-Cutting Process: Part I. The Ploughing Process in Metal Cutting
Tập 82 Số 4 - Trang 348-357 - 1960
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-tool inter...
Prediction of Cutting Forces and Tool Breakage in Milling from Feed Drive Current Measurements
Tập 114 Số 4 - Trang 386-392 - 1992
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 current
as a ...
Fixture Failure Diagnosis for Autobody Assembly Using Pattern Recognition
Tập 118 Số 1 - Trang 55-66 - 1996
In 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
measuremen...
Some Applications of Graph Theory to the Structural Analysis of Mechanisms
Tập 89 Số 1 - Trang 153-158 - 1967
Concepts 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 spatial
mecha...