Gavril Grebenisan

University of Oradea · Department of Industrial Engineering

This paper presents an original method of additive manufacturing of cylindrical parts with variable circumference thickness, which allows the control of the deposition of molten material using an algorithm for decomposing the part geometry into volumetric elements with known dimensional configuration. In the absence of a post-processor capable of c...

In industrial engineering practice, the use of cutting tools, or those of plastic deformation (dies), is known, involves high costs of materials, and requires, at the same time, conditions of high resistance to deformation. The reduction of the mass of the parts, ie the reduction of the costs with the materials, from the composition of the tools, a...

A research topic was launched to solve a current engineering problem: the design of a 3D printing device/equipment for the implementation of additive technology. This device shall be adapted on a numerically controlled machine, CNC TMA-AL-550, for dual operation under a milling machine or the printing equipment control. During the development of th...

The present study uses an estimation and prediction method and characteristic techniques to predict the life of the lubricating oil based on data collected directly from the mechanical or hydraulic system. The collected data is part of a complex data set with 19 lubricating oil status parameters resulting from online measurements on an experiment s...

The present study uses an estimation and prediction method and characteristic techniques to predict the life of the lubricating oil based on data collected directly from the mechanical or hydraulic system. The collected data is part of a complex data set with 19 lubricating oil status parameters resulting from online measurements on an experiment s...

The paper presents 3D modeling and the construction of a printing head for plastic, a head that will be used on a CNC milling machine. The component parts were modeled with Solid Edge software, and for manufacturing the parts we use a CNC milling machine and one conventional lathe. Following the manufacture of the parts, they were mounted together....

This paper presents the command and control part of a 3D printhead, the command and control that is made by combining the PLC of a CNC milling machine with the electrical assembly of an extruded head for FDA(Fusion Deposition Adhesion) processing. The command and control part of an extruder head is presented. On the same, the paper shows how to con...

The paper presents a case study which the additive manufacturing technology is combined with finishing process by cutting operations (turning) for manufacturing a part. The part was manufactured through additive manufacturing, using a 3D printer and the and the finishing process is performed by a lathe, resulting in technological properties and the...

In this paper, a brief overview is presented, resulting from a recent literature review of some representative books or papers regarding various research on additive manufacturing. Some basic terms are presented, in the context of founding the existence of several terminologies for some specific expressions of this subject, as well as different def...

This paper aimed to validate a working tool, component of the Predictive Maintenance Toolbox ™, produced by Matlab (MathWorks), in the case of a procedure for monitoring the operation of mechanical systems, in order to diagnose a failure of the process and to estimate the remaining useful life (RUL). This toolbox provides toolsets, materialized in...

This work contains the 3D design and finite element analysis of a manual device for assembly by bending the sheets around an exhaust muffler. As a result of the design of the device, the requested was executed by the information provided by the mechanical designer; only when the device of bending was put into operation, some faults appeared, namely...

This paper presents the theoretical basis of the approach to Finite Element Analysis (FEA) techniques and their application in the case of a bending request for a piece of aluminum sheet. The plate of a bending device deforms elasto-plastically under the action of the drive forces of the device, but also under the action of the reaction forces in t...

The deformation of an aluminum plate, called in this paper, a support plate, which is part of a bending plastic deformation device, is studied in this paper using the Finite Elements Method, respectively design points of the design by optimization using features such as Design of Experiments and Response Surfaces. The start of the analysis was dete...

In this paper, we present a part of our wider research regarding modeling, simulation and optimization of the trajectory of the industrial robots. After a short introduction on the importance of the industrial robots, the necessity and widely interest regarding the trajectory optimization, we present a classification of the optimization methods: nu...

In this paper was used the data set collected in a research project between private companies from Romania and Italy, for the development of a basic approach of artificial neural network techniques, as an application in Matlab, aiming to detect the degree of degradation of oil, an automated installation, measuring online the physicochemical propert...

To determine the elastic/plastic deformation value of the part, we used Ansys R19.0 software(CAE), to simulate a torque moment applied to the functional area part, which provided the information set about the part behavior. The mold of the part has 4 cavities, and the part material is a polyamide. Having a requirement imposed by the customer on the...

Condition monitoring and machine status classification are of great practical importance in the manufacturing industry as it provides online updates on the state of the machine, avoiding loss of production and minimizing the probability of generating catastrophic damage to the machine. In this paper, the classification of conditions is based on the...

The deformation of an aluminum plate, called in this paper, a support plate, which ispart of a bending plastic deformation device, is studied in this paper using the Finite ElementsMethod, respectively design points of the design by optimization using features such as Designof Experiments and Response Surfaces. The start of the analysis was determi...

This paper addresses a delicate problem, namely the diagnosis of the state of the oils in the industrial systems, namely the machine tools. Based on measurements (the data set contains over five million records), within a Machine Intelligence for Diagnosis Automation (MIDA) project funded by the National Program PN II, ERA MANUNET: NR 13081221 / 13...

This approach is focused on Machine Intelligence for Diagnosis Automation, a research program, which promotes « preventative maintenance in manufacturing plants through the development of a fully automated prototype for oil analysis and fault prediction. The prototype is based on Artificial Intelligence (A.I.) software and online hardware ». Monito...

In the industrial practice, the product is intended to be flawless, with no technological difficulty in making the profile shapes. If this product results without defects, then any Finite Elements Method (FEM) based simulation can support that technology. A technology engineer does not propose, very often to analyze the simulation of the design tec...

A theoretical and experimental analysis was carried out, after superplastic forming, of Al-Ti-V-based alloy sheets, of hemispherical parts, as the start point of research. Based on the measurements i.e. the quantitative and qualitative determinations of the manufactured parts, work reports have been prepared to contain the magnitude of variations i...

The reason for choosing this theme is to emphasize the phenomena that occur in a set (measuring device) due to external environmental factors and forces that errors involved in the measurement process. These factors influence the measurement results and their presence can not be seen with the naked eye. Thanks to the progress of last years and help...

All settings and results of a plastic deformation analysis, using the Explicit Dynamics module, on ANSYS, are presented here. Starting with a geometric model of the system analyzed, are presented here the mesh structure, the initial conditions, forces and restrictions (such as fixed support and displacement). and finally the results and solution. T...

The Analysis by Finite Element Method (FEM), accomplished using ANSYS software, has the central aims to determine the behavior of a part’s material, geometrically welldefined, of a mechanical, electrical, thermal assembly, subjected to any of external actions, such as physics, mechanical, thermal, electrical, and any other, well defined. The materi...

Based on recently authors' works, [1], this paper, consists on an extension of volumes generation mathematical model, and are focused on a step by step procedure of volume generation. This work are mainly studied the behavior of finite elements of gas-blow formed parts (such as hemispherical work piece). The aims of the work are to investigate, by...

Sonic pollution is characteristic to urban congestions, having harmful consequences upon inhabitants' health. Sonic pollution evaluation became the big cities' local's city hall desideratum, in order to take necessary measures to reduce it. The paper presents the results of a study concerning the identification of measuring location for acoustic le...