The Experts below are selected from a list of 90 Experts worldwide ranked by ideXlab platform
Changsun Moon - One of the best experts on this subject based on the ideXlab platform.
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Dimensional Change in Drawn Wire Product in the Two Cross-Roll Straightening Process
Transactions of The Korean Society of Mechanical Engineers A, 2013Co-Authors: Changsun MoonAbstract:The two cross-roll straightening process at room temperature is a manufacturing method for improving the straightness of a drawn Wire. The distribution and magnitude of the internal and surface residual stresses of the drawn Wire are changed after the Wire-drawing process through the two cross-rolls; this also results in a change in the diameter of the drawn Wire. The remaining residual stresses of the drawn Wire after the Wire-drawing dimensional changes were analyzed according to the distance between the rolls, oblique angle between the axes of the roll and the Wire, predicted residual stresses, and dimensional change in the final Product. The oblique angle between the concave and convex rolls did not affect the residual stresses or dimensional change, but the distance between rolls did.
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study on dimensional change in Wire Product during Wire drawing process
Transactions of The Korean Society of Mechanical Engineers A, 2012Co-Authors: Changsun MoonAbstract:During the cold Wire-drawing process, the diameter of a Wire is reduced and the length of the Wire is increased as the Wire passes through the die. The pressure and sliding motion at the interface between the Wire and die cause elastic recovery of the workpiece and friction and wear on the die. In addition, Wire deformation and frictional heating raise the temperature of the Wire and die, resulting in difficulty in manufacturing the drawn Products according to a designated inner diameter of the die, deviating from the designated dimension or the inner diameter of the die. In this study, considering the die temperature distribution, the effects of dimensional changes of the drawn Products were analyzed quantitatively; these changes are caused by the elastic deformation of the die, the elastic recovery of the workpiece, and the thermal deformation of both the die and the workpiece. It was confirmed that the elastic recovery of the workpiece influenced these changes the most. The initial dies considering these factors could avoid deviation from the designated dimension, and the desired drawn Products were obtained by using the designed initial drawing dies.
J.q. Whitley - One of the best experts on this subject based on the ideXlab platform.
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Coefficients of friction for arch Wires in stainless steel and polycrystalline alumina bracket slots. I. The dry state
American Journal of Orthodontics and Dentofacial Orthopedics, 1990Co-Authors: R.p. Kusy, J.q. WhitleyAbstract:The surface roughness and the coefficients of friction were measured for sixteen arch Wire-bracket combinations. The sample included one rectangular arch Wire Product from each of the four principal alloy groups and one bracket Product from among the stainless steel and polycrystalline alumina inventory. Although subsamples representing both the 0.018-inch and the 0.022-inch slot sizes were evaluated, no differences were observed in their rankings. When tested over a series of eight incident angles, the optical surface roughness of representative stainless steel and alumina brackets averaged 0.148 and 0.193 μm, respectively. After testing at a single angle (82°) and referencing a nomogram, the roughness of the stainless steel, cobalt-chromium, beta-titanium, and nickel-titanium arch Wire surfaces averaged 0.053, 0.129, 0.137, and 0.247 μm, respectively. When the various arch Wire-bracket couples were pressed against an 0.010-inch stainless steel ligature Wire at 34° C and otherwise prevailing atmospheric conditions, the coefficients of friction ranged from stainless steel (lowest) to cobalt-chromium, nickel-titanium, and beta-titanium (highest)—regardless of bracket Product or slot size. These results corroborated earlier observations in which the same arch Wire Products were drawn between stainless steel or alumina contact flats. In the current research, the average coefficient of kinetic friction for the stainless steel couple (0.139) was less than that for the stainless steel arch Wire against a polycrystalline alumina bracket (0.174).
D.j. Barta - One of the best experts on this subject based on the ideXlab platform.
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Revisions of the periodic conformance testing procedures in the NEMA MW 1000 magnet Wire standard
Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo 2005., 2005Co-Authors: D.j. BartaAbstract:In the last few years, there has been a considerable amount of activity generated in the NEMA 6-MW Technical Committee due to a change in philosophy regarding the periodic conformance testing of magnet Wire Products. In the past, the periodic conformance tests have been designed around the special testing of a few standard AWG sizes, to define the unique properties of a particular magnet Wire Product type. These periodic conformance tests have been used to describe the uniqueness of the particular insulation system of the MW type, rather than to describe the expected performance of different Wire sizes in these periodic conformance tests. The need to perform these periodic conformance tests on other Wire sizes has created the demand for a new approach
Chi Rong - One of the best experts on this subject based on the ideXlab platform.
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Improvements of Zinc-cupro-nickel Alloy Waire Drawing Process
Yunnan Metallurgy, 1998Co-Authors: Chi RongAbstract:According to the property and features of zinc - cupro- nickel alloy Wire, its drawing lubricant and drawing die have been improved to solve quality problem in commercial operation. Emulsion and normal die were replaced by sticy lubricant and composed pressure die respectively. These not only improved drawing and lubrication, but the saved energy and other consumption. And Productive cycle was shorted with improved quality of Wire Product
J.e. Bodette - One of the best experts on this subject based on the ideXlab platform.
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A new high temperature magnet Wire with excellent chemical stability
[1991] Proceedings of the 20th Electrical Electronics Insulation Conference, 1991Co-Authors: K.d. Bultemeier, J.e. BodetteAbstract:A method has been developed which utilizes a melt application process to manufacture a magnet Wire with poly(aryletherketone) as the insulating material. The resulting magnet Wire Product exhibits exceptional properties in hostile environments. This developmental magnet Wire Product has application in areas requiring high thermal and chemical resistance. >
