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Viktor Ráczi, Sándor Sipos and Gabriella Farkas

Abstract

For machining of increasingly complicated geometries, the longitudinal and transverse turning operations should be performed with a single tool. Leading manufacturing companies have developed a number of constructions. The world’s largest manufacturer has recently revolutionised turning by launching roughing and finishing tools. The roughing insert can work with “high feed turning” in four different directions of movement. This tool has a unique chip forming and removal, it forms a unique machined surface. This study gives an overview of the results achieved in this area.

Open access

Levente Pécsi, Judit Pásztor and András Kakucs

Abstract

Archery is a tradition, a style of martial arts and a competitive sport, while at the same time being an art form. The equipment consists of a bow and arrows. The deflection of the arrow is a very important characteristic, one which has a decisive influence on how and if the arrow reaches the target. This has a tremendous impact on the performance of the archer in both competition and archery demonstrations. The quantification and measurement of arrow deflection is equally important to both manufacturers and archers. It is affected by the arrow’s static bending. In this paper the bend of the arrow shall be determined.

Open access

Sándor Uszkai, Beatrix Papp, Ádám Nemes and Timotei István Erdei

Abstract

Nowadays the ongoing trend of integrating everything into the cloud, connecting all sorts of gadgetry to the Internet (IoT) is omnipresent at this point, even in the industry, where small and medium sized companies alike can join this tendency. This is undoubtedly the result of the arrival of Industry 4.0, which caused an exponential growth in this field. This poses a new challenge for the IT field, since it needs in-depth knowledge of networking and routing, and formidable knowledge of the different devices and programming languages alike. Our project premises an RFID-based fully-fledged access control system, with a targeted market of small to large companies, and also individuals, as the result of ease of use, low price, and simplicity.

Open access

Roland Nagy, Péter Lendvai, Réka Kothencz and László Bartha

Abstract

The efficiency of demulsification is a key process in terms of extracting the oil of O/V (oil-in-water type) emulsions of enhanced oil recovery. Consequently, the separation of emulsion systems and the recovery of the maximum amount of oil from the colloid system play an important role in the petroleum industry. The stability of the emulsions from oil recovery is influenced by numerous factors. J. L. Salager developed the HLD (Hydrophilic-Lipophilic Deviation) equation in order to examine the efficiency of demulsification. Our aim was to investigate whether the equation developed by Salager is suitable for monitoring the stability of petroleum industrial emulsions.

Open access

Gyula Bagyinszki and Enikő Bitay

Abstract

The technological advantages of ultrasonic welding: (no requirement for filler metal; use of small electrical transient resistance contacts; ability to weld thin materials to thick materials) results in a helium-solid weld seam; the computer configuration of the welding parameters can easily be solved; clean and safe workflow (no sparks, flame or smoke); can be integrated into the production line. This article deals with some of the additional application features of this welding process.

Open access

András Gábora, Kristóf Balázs Sipos, Gyula Dávid Lovadi, Attila Szántó, Gusztáv Áron Szíki and Marian Borzan

Abstract

The Faculty of Engineering of the University of Debrecen has more than ten-years of experience in developing vehicles with pneumatic drive. It is an increasing challenge for the developer teams to improve the performance of vehicles, with rules becoming increasingly strict year by year. Recently, a student team of the Faculty of Engineering began developing a telemetric system to support the other teams at our Faculty and improve the possibility of their successful racing in this way.

Open access

Csaba Ungvári, Andrea Izbéki-Szabolcsik and Ildikó Bodnár

Abstract

In our research we pre-treated synthetically produced greywaters with filtration on various filters. We characterised the quality of greywater samples using several parameters. We investigated these parameters on the untreated and pre-treated samples as well. We evaluated the efficiency of the treatments by measuring the characteristic parameters. It was shown that the most effective pre-treatment for the greywater’s preparation for reuse is filtration on silica sand or activated charcoal and silica sand combined filter media.

Open access

Richárd Molnár and Gergely Dezső

Abstract

Nowadays more and more ultralight aircraft are being built because the building process itself and the acquisition of the necessary documentation is relatively easy. Furthermore, these planes are easier to fly than larger types of aircraft. This article presents the engineering work and documentation that is necessary for the building process. The calculations can be done traditionally on paper which is an extremely complex task. With the innovations and developments in the technical field though, it is possible now to simplify these calculations, the basis of which is the finite element method and aerodynamics simulations. If the finite element method is adequate, the boundary conditions are ideal and input-output settings for the simulations are correct, it is possible to compare the traditional calculations to the modern simulated engineering work, thus the time necessary for achieving precise results becomes significantly shorter.

Open access

Loránd Márton

Abstract

This paper deals with criteria and conditions that must be fulfilled by a modern grinding wheel dressing system. Its main task is the correct drawing of the given profile. By this task, the diamond pin’s axis must close during the motion at a constant angle with the normal of the wheel’s surface. This study presents the build-up and the proposed control strategy of the dressing device. Two control methods were analysed and compared.

Open access

Dan Alexandru Libotean, Alexandru Chira and Ferdinánd-Zsongor Gobesz

Abstract

The textile reinforced concrete is a material with increased mechanical properties that can allow the production of lighter structural elements. The alkali-resistant textile reinforcement is not affected by corrosion. A structural facade panel and a light pole were modeled in order to study their behavior in the case of wind pressure. The developed numerical simulations were calibrated according to available data from the literature. These simulations revealed information potentially useful in the planning of further experimental tests.