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The surface quality is dependent on certain cutting process parameters that can vary, causing variations on the surface roughness. The main subject of this paper focuses on the experimental research management applied to a technological process whose final purpose was to determine an equation of the surface roughness depending on the process parameters, obtained by the Al7136 end milling process. The research method used in this paper is the Taguchi's method. According to the research management steps, in order to perform the experimental determination of the surface roughness, an experimental stand used to determine the objective function was presented. The surface roughness equation was determined using the Minitab 17 software. The regression equation allows to calculate the surface roughness at any point in the established experimental field.

This scientific paper conducts a study meant to improve the quality management of the thermosonic welding process of gold wires in the automotive industry. Within the large amount of electronic products manufactured worldwide, the gold wire bonding is the preferred technology for creating the needed interconnections in the microelectronic industry. In this paper, the quality management improving starts with an experimental research in the automotive industry, based on the gold wire thermosonic bonding, in terms of: conformal structuring, robustness and integrity of the electrical contacts. The experimental research is based on the processing parameters and on the independent variables and objective processing functions. In order to highlight the impact which one or more factors have on the quality of the thermosonic bonding, the dispersion analysis method was used. According to this, the importance of each factor, but also each factor's optimization, was underlined. The final goal was to reach a high reliability and quality of the finished goods.

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).