Scientific Bulletin Series C, Volume XXXVII (2023)

The Influence of The Spindle Speed on the Damping Capacity of the Oil Film for a Radial Bearing with the Ratio L/D=1 as a Function of the Static Loading of the Bearing

Ioan Marius Alexandrescu, Radu-Iacob Cotetiu, Ioana Laura Alexandrescu

Abstract: The main objective presented in this paper is to determine the acceleration taken during the shock by the bearing-lubricant film-spindle system and the damping of the lubricant film of the bearing with the ratio L/D=1, for the spindle speed n = 370 rpm, and n = 600 rpm, the dynamic load F3=3332 N depending on the static load G1 and G2, and to determine the influence of the spindle speed on the damping capacity of the oil film for a radial bearing with the ratio L/D=1 as a function of the static loading of the bearing.

Keywords: acceleration of the bearing, damping capacity, radial sliding bearing, ratio L/D=1.

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Actuation of a Linear Electromechanical Actuator

Ionuț Ciprian Bîrsan

Abstract: The present work aims to analyze an electromechanical actuation, composed of a system in which we have a linear electromechanical actuator, nut screw type, with balls, driven by an asynchronous electric motor with the rotor in short circuit and controlled by a frequency and voltage converter. This work is part of a large study that aims to try to optimize some operating parameters of a linear electromechanical actuator. First, some characteristics of electromechanical with ball nut type actuators will be mentioned, then a presentation of a frequency and voltage converter. Finally, some results of some measurements regarding the actuation of the linear electromechanical actuator with an asynchronous motor with the short-circuited rotor will be presented and concluded.

Keywords: Actuator, actuation, asynchronous motor, electromechanical, frequency converter, linear.

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Considerations on the Current State of Research on Vibration Testing of Rubber-Metal Products

Alex Marius Cerapon, Radu-Iacob Cotetiu, Vasile Nasui

Abstract: The paper presents some considerations on the current state of research in the field of vibration testing of rubber-metal shock absorbers used in the railway field for high-speed trains. For these, the performance increase due to the accelerated development of transport vehicles with ever higher speed is aimed at. The main problem with rubber plug-type dampers used in the railway sector, which have embedded metal elements in their construction, is the resistance of the rubber-metal contact area.

Keywords: vibration testing, rubber-metal dampers, high-speed trains, rubber-metal adhesion.

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Exploring the Practical Uses of Technology and Harnessing the Power of Big Data

Raul Florentin Drenta, Diana-Elena Micle

Abstract: This scientific article explores the practical uses of technology and the power of Big Data. In the 21st century, the fusion of technology and Big Data has emerged as a transformative force, reshaping the way we live, work, and interact with the world around us. The research delves into the multifaceted applications of technology and the strategic utilization of Big Data to unlock unprecedented insights and drive innovation across diverse sectors. The article dissects the symbiotic relationship between technology and Big Data, shedding light on how their integration can revolutionize industries, streamline processes, and pave the way for unprecedented advancements. The insights gleaned from this exploration will not only contribute to our understanding of the practical uses of technology and Big Data but also provide a roadmap for harnessing their combined power to address some of the most pressing challenges facing society today.

Keywords: Technology; Big Data; Industry 4.0; The Internet of Things (Iot).

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An Examination of the Logistical Distribution of Final Bread Goods in the Industry from a Theoretical Perspective

Raul Florentin Drenta, Dan Adrian Pop

Abstract: The distribution process is a crucial aspect of economic activities conducted by market participants. This process must be designed to maximize the value of each product, considering various aspects related to the function of distribution in each unit’s activities, the fundamental components of this process, the distinct elements of diverse market structures, and a set of criteria that can serve as the foundation for organizing distribution relationships. The conceptual notion of distribution must be approached from two perspectives: the macroeconomic perspective and the microeconomic perspective. From a macroeconomic perspective, distribution is determined by the interplay between three key components of the market: production, consumption, and distribution. Distribution encompasses all the methods and processes that provide the accessibility of products and services generated by firms to the final customers.
Hence, it is crucial to differentiate the notion of distribution from the act of transporting products. This paper examines the logistical distribution of final bread goods in the industry from a theoretical perspective.

Keywords: logistical distribution, final bread goods, industry, macroeconomic perspective, microeconomic perspective, accessibility.

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Complaint Management in the Manufacturing Industry

Dacian Manoliu, Nicolae Stelian Ungureanu

Abstract: To maintain a competitive edge and satisfy customers in a way that fosters a long-term connection, manufacturers are changing their business model from one that is product-dominated to one that is customer-centric. Company performance is seen to be influenced by how complaints are handled. It is essential to look at a company’s internal complaint handling management to identify the critical elements that affect how well complaints are handled in the manufacturing sector.
We propose conducting a series of case studies with managers from different manufacturing organizations by participating in semi-structured, face-to-face interviews.

Keywords: competitive advantage; customers; the producers; managed complaints.

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Closing the Gap between Relationship Marketing, Customer Relationship Management and Customer Complaint Management

Dacian Manoliu, Nicolae Stelian Ungureanu

Abstract: This study critically examines the literature on relationship marketing, customer relationship management, and customer complaint management. It aims to provide an overview of the fundamental principles of CRM and complaint management systems, identify research gaps, and examine current challenges. The study also explores the terminology, conceptual frameworks, and solutions offered by CRM systems, as well as the roots of prevailing challenges and the methodologies used to address them. It also reviews existing academic work and provides definitions derived from the literature review. The study also discusses the four aspects of complaint handling: procedure, person responsible, system, and policy. The study highlights distinctions and similarities between companies’, legal, and theoretical perspectives on these aspects.

Keywords: CRM systems; complaints; customer; relationship marketing.

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Simulating and Improvement a Warehouse Flow Using FlexSim Application

Nicolae Medan, Adrian Seserman

Abstract: In recent years, the increasingly pressing problem for any commercial company is that of being flexible in order to respond to market demands. One of the places where continuous adaptation to market requirements is needed are warehouses. Depending on the needs, the warehouse must be able to redefine its routes for storing and delivering products. FlexSim software can be used for modelling, simulation, and improvement systems such as manufacturing, warehousing, health, material handling, logistics, etc. The aim of this paper is to improve the existing flow in a warehouse. For this, in the first stage, the warehouse is simulated in its existing state in order to be able to see the reception times, the storage mode, the package preparation times as well as the transport times. Based on the data obtained, in the second part, a simulation will be carried out in which the flow in the warehouse will be improved, starting from the different
aspects identified in the initial simulation. FlexSim software is used to define the model, simulate and improve the warehouse.

Keywords: FlexSim, simulation, warehouse.

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Considerations Regarding the Current State of Research in the Field of the Processing of Titanium Alloys Used in the Aeronautical Industry

Vasile Nasui, Andrei Catalin Filip, Dinu Daraba, Adriana-Gabriela Cotetiu, Mihai Bănica

Abstract: The paper presents some considerations from the analysis of the current state regarding the efficiency of processing some titanium alloy parts used in the aeronautical industry. The basic requirement is to improve the machining processes of titanium alloys components of aerospace structures using modern machining strategies as well as the characteristics of titanium in machining and its limits. With the rapid development of science and technology, it is necessary to make full use of advanced technology in the research and development of titanium alloys, and continue to explore, improve the manufacturing technology of titanium alloys. As an emerging metal material, titanium alloy is used in spacecraft due to its own performance advantages.

Keywords: aerospace, aircraft, alloy, titanium alloys, aeronautical industry.

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Considerations Related to the Past, Present and Future of use of Aluminum Alloys in the Aeronautical Industry

Nicolae Ioan Pasca, Mihai Banica, Lucian Butnar, Marius Cosma

Abstract: The present paper is meant to be a short presentation of the history of using aluminum alloys in the aerospace industry. The author shows some theoretical consideration regarding the apparition of aluminum alloys and presents examples of the used alloys in various places. Also, here we will see some statistics from WWI and the material used in current aeronautical industry.

Keywords: aerospace, aircraft, alloy, aluminum, composite, steel.

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Applications and Optimization Possibilities for Descriptive Geometry and Product Design

Alina Bianca Pop, Aurel Mihail Țîțu

Abstract: This study explores the potential benefits of incorporating descriptive geometry into the field of product design. Descriptive geometry, a mathematical technique for representing three-dimensional objects in two-dimensional space, plays a critical role in engineering and product design. The primary focus of this research is to emphasize the importance of descriptive geometry in creating practical, scalable, and customer-oriented product designs. This article aims to assess the potential value of descriptive geometry for optimization while illuminating its various applications in the realm of product design. The study covers areas such as manufacturing, assembly, performance improvement, the advancement of orthographic projections, the generation of 3D models, product design analysis, and product dimensioning. The primary finding of this study suggests that descriptive geometry proves to be a valuable tool for creating exceptional and recognizable products, enabling the exploration of geometric relationships, the construction of precise and comprehensive product representations, and the optimization of product design in terms of performance, assembly, and manufacturing. The research methodology involves a thorough review of relevant literature combined with case studies and illustrative examples showcasing the utilization of descriptive geometry in the context of product design. According to the findings presented here, product designers are encouraged to embrace descriptive geometry as an asset for crafting precise designs and enhancing product, assembly, and manufacturing performance. The survey results underscore how the combination of descriptive geometry and advanced computational tools equips designers with a potent resource for fashioning unique, well-optimized products that cater to consumer demands.

Keywords: Descriptive geometry, product design, optimization, applications, research.

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Impact of Re-steel and RCS Textiles on Color Constituency in Printing Processes

Florina Pop, Dinu Daraba

Abstract: This comprehensive study analyzes the influence of re-steel and RCS textiles on color consistency within the realm of sustainable printing, specifically focusing on Avira and Iconiq brands under XD Connects organization. Employing methodologies encompassing color absorbance analysis, ink compatibility testing on laser, CMYK inkjet printers, and heat presses, this research provides an exploration of color absorbance and printing efficacy. The primary emphasis lies on understanding the unique interplay between these eco-friendly textiles and color representation, offering a novel perspective on their integration into sustainable printing processes.

Keywords: color absorbance, ink compatibility plasma, blocker, laser printers, inkjet printers, heat presses printers.

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Experimental Research of Tensile Strength Variation of Welded Joints on MMA, MIG and WIG Welding Methods

Sandor Ravai-Nagy, Ioan Pasca, Catalin Darius Crisan

Abstract: The welding process have a high weight in a lot of industry fields. The quality requirement of welded joint with different methods of welding is very important. For this reason it is necessary to identify the optimum value of input parameters, not only individual value of each parameter but the optimum combination between them. The correct choice of the applied welding method is a challenge in terms of quality and costs. A lot of welding methods are available, each of them ensure different conditions by point of mechanical and chemical properties of welded assembly.
The tensile strength analysis of welded joint is one of the most important parameter in order to establish the quality of welding. Its analysis, for the most used welding methods like MMA, MIG and WIG methods, is necessary with experimental methods. Also, the influence of filler metal upon tensile strength of welded joint must me researched.

Keywords: Welding, tensile strength, welded joint, filler metal.

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