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Chrome plating of long bars in conventional batch plants proves to be challenging, requiring complex lifting equipment and considerable vertical space. Therefore, the use of continuous chrome plating plants, which allow controlled passage of the bars through the chrome plating bath, is preferred. The continuous hard chrome plating plant operates automatically, controlling the entire process from the loading to the discharge of chrome plated bars. The feed and discharge mechanisms must allow the flow of electric current through the bars subject to the chrome plating. This calls for the design of some mechanisms capable of ensuring a constant feed of bars and their efficient discharge. This paper presents a virtual study using finite element analysis (FEA) focused on the strength assessment of the mechanism including the drive pin, the levers and the sliding plates responsible for the movement of the bars. As a result of the study, essential data on critical stresses, local deformations and factor of safety (FOS) for the whole mechanism were obtained, thus providing valuable information for the optimization of the chrome plating process. [ABSTRACT FROM AUTHOR]

The study presents simplified approximations that allow the evaluation of the unidirectional longitudinal and transverse modulus of a composite material, starting from the elastic properties of the constituents (inorganic particles, matrices) as well as its relative properties. In calculations, the response of the composite material is assimilated with an associated system of particles and matrices [ABSTRACT FROM AUTHOR]

The purpose of using bubbling in the case of metal alloys was to increase the mechanical resistance, to improve the casting properties as well as to observe the changes brought by gases on the structure. During bubbling, especially hydrogen and oxygen are removed, which obviously leads to the improvement of metal alloys. The influence of bubbling on the casting properties is explained by the structural changes that occur in the cast alloys. Therefore, bubbling with methane gas is a safe means of improving the quality of cast parts, ensuring at the same time the increase of casting properties of alloys. [ABSTRACT FROM AUTHOR]

The temperature on the surfaces in sliding motion changes as a result of the operating conditions. The temperature distribution generated during the friction process depends on the forces generated in operation, the speed of sliding, the topography of the surface,the properties of the materials that form the friction coupling. The purpose of this paper is to analyze the effects of temperature increase on surfaces in sliding motion with implications on the hardness of friction coupling materials. [ABSTRACT FROM AUTHOR]

The effects of friction on polymeric materials are quite difficult to explain due to the micro and macroscopic interactions of the friction coupling surfaces, which slide over each other. The friction and wear behavior of surfaces in sliding motion can be considered important design criteria. By adding different concentrations of reinforcing agent to the base material, the tribological performance of surfaces in sliding motion can be obtained. The experimental study was carried out on a pin-on-disc type tribological stand under dry friction conditions. The friction and wear behavior was analyzed for two base materials (PTFE and PA66) and the same glass fiber reinforced materials (PTFE + 25% fiber-glass and PA66+GF30). The tests were carried out at different sliding speeds and loading forces, v1=0.20 m/s, v2=0.50 m/s, v3=0.75 m/s and loading forces, Fn1=1.0 N, Fn2=2.5 N, Fn3=5.0 N over a friction length of 5000 mm. Research has shown that the coefficient of friction decreases with increasing loading force. Tests have shown that a high value of the friction coefficient does not mean a high wear rate, the wear rate values are between 10-12 and 10-15 m2/N. TheL(1) presences of the reinforcing agent in the base material have a significant importance on the friction and wear behavior under the action of operating factors (load, sliding speed). [ABSTRACT FROM AUTHOR]