The shearing of the chips in a blind hole thread presents a particular problem in machining industry. The tap geometry plays an important role in the tool's durability, influencing the forces during the tapping process and also the way in which the chips are evacuated. This paper analyzes the influence of the tap geometry on the cutting of materials such as C45, 42CrMo4 and X5CrNi8. An adequate geometry will extend the tap durability by controlling the chip when the tap reverses while still engaged in the tapping process. It relates to the improvement of a spiral tap drill, which discharges chips towards the shank via a helical flute. The article contains details about the tap geometries and the results obtained in this research. Based on the results obtained in this research, the purpose of this paper was achieved. The tap durability was improved, the chip deposition on the rake surface was reduced and the torsion torque has a smaller value compared to the standard tap geometry.

Within the Faculty of Machine Building from the Technical University of Cluj-Napoca, Romania unconventional technologies researches were performed for 20 years. The team focused on national research projects referring to micro machining and special applications. EDM process (Electric Discharge Machining) has a great importance to the industry. Even if it never be able to compete with the metal cutting manufacturing process in terms of material removal rate, today it is the main manufacturing process of complex die and mould, due to the major advantages presented in this paper. Today, also the precision of the process competes with the milling process in terms of quality of the surface, which can arrive at values that, in some cases, are better than the values for grinded surfaces. The article presents the importance of the process in the industry of stamps, which can not be processed with other methods, due to special materials and forms that are wished to be obtained. The article presents comparatively the values of the roughness obtained by EDM process on different types of materials and by different process parameters. Concerning the optimisation of the EDM technological parameters, the research has been done on different types of EDM machines. The final scope is to elaborate a technological data base with the purpose of optimising the EDM process on different machines.

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Abstract. The goal of this paper is to determine the optimal cutting edge microgeometry for a carbide end mill used in stainless steel machining. The optimal cutting edge microgeometry will be determined through conducting more tool life tests. Tools with three different cutting edge radiuses and one without edge preparation will be tested in order to determine the influence of the cutting edge microgeometry on the wear and tool life. The edge microgeometry is obtained through wet blasting preparation.

Abstract. This paper sets forth the current state of security systems in prisons from Romania and around the world, particularly aiming electronic systems of monitoring the flow of people, materials control and perimeter security, focusing on the research results concluded by motion detection tests and devices. The currently used systems were observed in order to put an analysis of the methodology together and implement and perfect these systems in protected areas. The protection of citizens must be performed to the extent that is allowed by the legislation.

This paper aims to evaluate the solution behaviour of the "Overall Equipment Effectiveness" to determine the performance in innovative manufacturing environments. OEE literature categorizes six major losses: "Equipment failures and breakdowns", "Setup/Adjustments", "Idling and minor Stops", "Reduced Speed Losses", "Reduced Yields and Quality Defects and Rework". The technical implementation method used by the authors to achieve their scope has been described using a hybrid of software development programs such as: SAP MII, SAP PCo and SAP ME in relation to the theoretical existing principles. The results presented conclude that losses in practice can occur at both high rates and low rates and therefore, an innovative manufacturing concept must be further enhanced. In terms of performance related to equipment utilization, the specific stoppages and downtimes need to be taken in consideration and adjust the OEE results accordingly. The actual situation in a real-life environment has increased in efficiency, but as technology improves, opportunities for further development appear at a high rate.

The complex variable nature of the milling process complicates the scientific effort to understand it. Most scientific papers in this domain have focused on giving a particular solution for a specific subject of study, like: tool life, cutting forces, obtained surfaces after machining and so on. However a systematical analytical method for developing end milling cutter tools has not been found in the current literature. The main goal of this paper is to introduce and to give a general overview in the field of developing end milling cutters. The step-by-step approach focuses on the main element of a cutting tool: material, coating and geometry. Through an analytical study of the development of end milling cutters all elements in the design, manufacturing and testing have been taken into consideration. Such a method can be implemented when trying to analyze and summarize the research in the field of end milling cutters. The current paper is a preliminary evaluation in the development of end milling cutters. Further research will be accomplished in partnership between the Technical University of Cluj-Napoca and tool company Gühring KG.

In this paper are presented and analyzed a series of problems that are appearing during the CFRP machining. Due to their properties, the composite materials began to replace traditional materials (ferrous and non-ferrous) in a lot of industries leading out the development of new methods of machining or adaptation of the classic. Unlike traditional material, drilling in CFRP is more difficult due to inhomogeneity of the material, its high hardness but also due to lack of knowledge relating to how these materials behave. This paper investigates different types of tool wears as corner wear, welding, crater wear that are appearing in drilling operation due to the highly abrasive nature of the carbon fibers. Also, here is presented an evaluation that refers to the machined hole quality and describe defects as delamination, pull outs, fibers projections, pyrolysis and shape errors. The main goal of this paper is to verify the current status of technique in CFRP drilling in order to develop and produce a new drill geometry in a cooperation between the Technical University of Cluj-Napoca and the cutting tool company Gühring KG.