Grinding is a highly complex manufacturing process due to the stochastic nature of the active zone (composed of grains, binder, and pores) and, because of the large numbers of parameters, it influences the surface quality and material removal rate, which are the two main goals of this process.An important grinding application is the sharpening of cemented carbide cutting tools. Additional features of these processes compared to other types of grinding are the following: the small surfaces to be processed, which have many edges; high surface quality; small production series; different depths of cut; and specific mechanical properties of the cemented carbides used for cutting tools. The application is important because the quality of the clearance and relief surfaces (of the cutting tool) is important for the precision of the manufactured surface and the tool life of the cutting tool.The research focused on DK460UF tungsten carbide that consists of 91 % WC and 9 % Co. It is the main material used in twist drills, gun drills, end mills, etc.The aim of this study was to determine the optimum manufacturing parameters that lead to the desired surface quality. STATE OF THE ARTGiven its importance, the grinding process has been the subject of many investigations. In his book [1], Shaw presents the first grinding models developed in the 1990s.Currently, a large range of models are being developed. Some of them are physically focused. In this category, we include the fundamental analytical models, the kinematic, finite element method, regression and molecular dynamics. Empirical process models include regression and artificial neural models. The last category comprises the rule base models, which are heuristic [2].Kinematic models explain the grinding mechanisms, the parameters involved in this process, and their interdependence. Fig. 1 shows an original cumulative model of the main elements influencing the grinding process and the logical interaction between them. Grinding Tungsten Carbide Used for Manufacturing Gun Drills
In the present context of the construction domain where everything needs to respond to the market requirements and time efficiency is an ongoing issue, the paper analyses the optimum solution for a sliding formwork. By using all the previous data obtained through PLM (Product Lifecycle Management) approach, we determined the particular solution. For this creative methods were used.As a future step, by having such solution we can design an intelligent equipment and make a step ahead in the formwork industry.
The construction domain is an important part of everybody's life consisting of one of the major needs in the Maslow's pyramid: safety. The now-a-days complex, spectacular designed constructions imply new technologies with high efficiency and precise equipment.The paper analyses the optimum solution for the desired product by using the PLM (Product Lifecycle Management) approach, starting by using previous primary and secondary information and pursuing with the solution determination. The conceptual solutions are obtained through creative methods from the specifications-the functions-of the improved product.Hence, having the proper solution that responds to the client's needs we can make the next step in designing the model of the improved formwork equipment.
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