Showing papers in "Journal of Engineering for Industry in 1971"
TL;DR: 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 dynamic response of mechanical and electromechanical systems as mentioned in this paper, including determination of dynamic force amplification, frequency response, time displacement characteristics, and other dynamic characteristics.
Abstract: 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-displacement characteristics, and other dynamic characteristics. Whenever possible, the results for the impact pair under various operating conditions are illustrated by graphs, which may also offer some insight into the behavior of clearance-coupled systems.
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TL;DR: The basic concepts of screw coordinates described in Part I are applied to the numerical kinematic analysis of spatial mechanisms, illustrated with reference to the displacement, velocity, and static-force-and-torque analysis of a seven-link mechanism with screw pairs.
Abstract: The basic concepts of screw coordinates described in Part I are applied to the numerical kinematic analysis of spatial mechanisms. The techniques are illustrated with reference to the displacement, velocity, and static-force-and-torque analysis of a general, single-degree-of-freedom spatial mechanism: a seven-link mechanism with screw pairs (H)7 . By specialization the associated computer program is capable of analyzing many other single-loop spatial mechanisms. Numerical examples illustrate the results.
TL;DR: In this paper, an experimental investigation in which SAE 1040 steel was cut orthogonally with fluid being forced directly into the chip-tool interface through a small hole in the rake face of the tool is described.
Abstract: : An experimental investigation in which SAE 1040 steel was cut orthogonally with fluid being forced directly into the chip-tool interface through a small hole in the rake face of the tool is described. Three fluids were used, a straight mineral oil, and the same oil containing either chlorine or sulphur. The distance of the hole from the tool tip was varied over a range of one to three times the depth of cut. Results indicate that cooling of the chip-tool interface by the injected fluid is of primary importance; and that blocking of the hole is a result of the breakdown of chloride and sulphie films caused by high temperature at the interface. An explanation of how the fluid escapes from the chip-tool interface is provided. (Author)