By Yiming (Kevin) Rong
Illustrates lately built fixture layout and verification expertise, targeting their imperative position in production tactics. The textual content makes use of updated desktop know-how to reduce expenses, raise productiveness and guarantee product caliber. It offers complex info and research that's without delay appropriate to improvement of entire computer-aided modular fixture layout process
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Extra resources for Computer-Aided Fixture Design
Intensive removal of hydroxyl hydrogen from the slag is promoted by an addition of fluorides to the flux. This leads to a marked lowering of hydrogen content in the weld metal. Hydrogen may be removed from the slag, and, hence, its content in the weld metal may be reduced due to electrolysis of the liquid slag. 13 Dependence of oxygen content in the weld metal on ferrous oxide content in the slag in covered-electrode welding: (1) basic coating; (2) acid coating. 30 Since nitrogen penetrates into the metal from the atmosphere, having first passed through the slag, the process of metal interaction with nitrogen will depend on nitrogen concentration in the slag and on its diffusion mobility in the slag melt.
This is related to the fact that in a wetting liquid, the energy of the surface layer, contacting the solid, is smaller per unit area, than the energy of the liquid surface layer, not contacting the solid. For the unwetting liquid, this ratio is inverse. 4 THE ADSORPTION PROCESS Difference in the magnitude of surface energy per unit surface area of the liquid, is related to the fact that in addition to the attraction forces, acting from the side of the liquid inner layers, the molecule of the liquid surface layer is also under the impact of the forces of attraction or repulsion from the side of the molecules of the solid surface.
SA þ sA – B : (2:14) Therefore, in a liquid’s spreading over the surface of another liquid, the intensity of spreading rises with the increase of the work of adhesion and reduction of the work of cohesion of the spreading liquid. Difference in the behavior of the wetting and unwetting liquids consists in that the wetting liquid demonstrates a tendency to increasing the area of contact with the contacting body, and an unwetting liquid — to a reduction of this area. This is related to the fact that in a wetting liquid, the energy of the surface layer, contacting the solid, is smaller per unit area, than the energy of the liquid surface layer, not contacting the solid.