0000000000617791
AUTHOR
Mihail Aurel ŢîţU
Modeling the machined surface quality of an aluminum alloy using the active experiment type
Abstract The surface roughness obtained by the cutting processes has always been a subject of great interest when it is intended to improve the quality of the final product requested by the customer. The objective of this scientific paper involves a comparative study on the tracking of the surface roughness measured both longitudinally and transversely in the direction of the cutting feed movement, following the end-milling process of an aluminum alloy used in the aerospace industry worldwide. Practical experiments have conducted in a prestigious company in the aerospace industry of Romania. Regarding the cutting regime, in terms of milling, a cutting speed was adopted to maintain its const…
Using the factorial experiment method to analyze the corrosion protection process
The organization functions are: research-development, production, commercial, financial-accounting, personnel and quality. In this paper the factorial experimental method will be applied, which is currently one of the most widespread methods used in the research-development departments of the organizations, due to its advantages and efficiency. The experiment was carried out at SC Coifer Impex SRL-Mirsa’s metal structures factory. In this paper it is presented the factors modelling that exerts their influence on two objectives functions: the ensuring the nominal thickness of the rough-cast film and the consumption limiting. For data processing the STATISTICA 7 software was used which provid…
Optimization of the objective function –surface quality by end-milling dimensional machining of some aluminum alloys
Abstract In the aerospace industry, the milling of aluminum alloy parts is a machining process with the primary purpose of removing high volumes of material. Aluminum alloys are materials that have relatively good machinability, which helps the process because many of the components of the aircraft are of high dimensions. These parts have many pockets more or less deep, and the removal by cutting off about 90% of the initial volume of the workpiece is a matter of consideration. The manufacturing process is protracted and involves long semi-finishing and finishing operations, so it is recommended that any researcher who begins and finishes an experimental study should do it base on a specifi…
Applying Experimental Research Management to a Technological Process using Taguchi's Method
Abstract 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 equat…
RETRACTED: Measuring Service Quality in Tourism Industry
Abstract The expansion of the service sector, the stronger competition resulting from globalization and deregulation, and the emergence of new information technologies have accelerated the shift toward a knowledge-based and innovation-driven economy. With the increasing role of tourism in global economy and the growing competition in the global tourism market, the importance of developing quality tourism products has been recognized by both the public and the private tourism sectors. In order to develop quality tourism, organizations need to know what their competitive advantage is and what capabilities they need to grow and maintain. The aim of this paper is to analyze the customer satisfa…
Measuring Service Quality in Tourism Industry
AbstractThe expansion of the service sector, the stronger competition resulting from globalization and deregulation, and the emergence of new information technologies have accelerated the shift toward a knowledge-based and innovation-driven economy. With the increasing role of tourism in global economy and the growing competition in the global tourism market, the importance of developing quality tourism products has been recognized by both the public and the private tourism sectors. In order to develop quality tourism, organizations need to know what their competitive advantage is and what capabilities they need to grow and maintain. The aim of this paper is to analyze the customer satisfac…
Improving the Quality Management of the Thermosonic Welding Process of Gold Wires in Automotive Industry
Abstract 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 variab…