Volume 12, Issue 4, 2017/Journal Proceedings in Manufacturing Systems

Abstract: This paper presents the working steps for the validation of the forward geometric models of ABB industrial robots (IR) using their virtual models (CAD models) along with CATIA and ABB RobotStudio software applications. Applying this method, one can obtain on the basis of the virtual model a series of results regarding the position of the characteristic point of the robot according to joint positions, results that can be compared with the results of the mathematical model analytically calculated for different configurations. By comparing these results, one can determine the correctness of the forward geometric models.

Key words: industrial robots, new modeling approach, forward geometric model, cross validation methods.

pp. 155-160 View full text

Architecture of the RFID systems used in production systems

Adrian POPESCU^1,*, George ENCIU², Emilia POPESCU³, Irina TACHE⁴

¹⁾ PhD, Lecturer, Machines and Production Systems Department, University “Politehnica” of Bucharest, Romania

²⁾ PhD, Prof., Machines and Production Systems Department, University “Politehnica” of Bucharest, Romania

³⁾ PhD, Assistant Professor, Machines and Production Systems Department, University “Politehnica” of Bucharest, Romania

⁴⁾ PhD, Lecturer, Automatic Control and Systems Engineering Department, University “Politehnica” of Bucharest, Romania

Abstract: This paper presents a case study which points out the way the radio frequency identification RFID systems are integrated into automated production flows from an information flow viewpoint. For the experimental research, we used an RFID system with a reader, a programmable logical controller for storing the data in a common database and a computer numerical control machine. Thus, two objectives were pursued: the presentation of the main types of architectures specific to radio frequency identification systems in terms of their performances and the way of storing the information specific to the processings performed by a computer numerical control machine for the workpieces or the workpieces to be processed. This was possible by attaching an RFID tag to each palette on which a workpiece to be processed was positioned. By means of the RFID system, we could identify the information on the processings to be performed or we could write information about the processings performed for each workpiece. In implementing and operating the radio frequency identification system, the positioning of RFID readers in relation to the tag palettes on the structure of the tool machine was taken into account to avoid potential interference.

Key words: radio-frequency, tag, reader, programmable logical controller, CNC.

pp. 161-167 View full text

Aspects regarding the grinding process of granite used in paper industry

Petre VALEA^1,*, Eugen STRĂJESCU²

¹⁾ PhD Student, Eng., Machines and Production System Department, University Politehnica from Bucharest, Romania,

²⁾ Prof., PhD, Machines and Production System Department, University Politehnica from Bucharest, Romania

Abstract: The paper presents same information regarding the grinding process of granite rollers mantle used in paper industry and a research that is focused on the quality and economical aspects of the plane grinding process of some samples of granite material (identical to the granite mantle of the analyzed roller). The main purpose was to determine a correlation between the cutting parameters: cutting speed, longitudinal cutting feed and cutting depth and the machined surface roughness, cutting temperature and machine –tool power consumption for rough and finish granite grinding process. Polynomial regression equations that reflect the correlation between the dependent parameter considered and the independent parameters are also given. The paper also gives recommendations regarding the rough and finish granite grinding process with diamond discs and without any cutting coolant.

Key words: external cylindrical grinding, granite rollers mantle, process parameters, diamond discs, temperature, power, roughness.

pp. 169-178 View full text

A new design of product label

Valerian ZAHARIA^1,*, George CONSTANTIN²

¹⁾ MS Student, Eng., Machines and Manufacturing Systems Department, University "Politehnica" of Bucharest, Bucharest, Romania

²⁾ PhD, Prof., Machines and Manufacturing Systems Department, University "Politehnica" of Bucharest, Bucharest, Romania

Abstract: In the first part of this study, a procedure of die-cutting the roll self adhesive labels and the worldwide situation of this procedure are presented. In the second part of this study, there is a description of the implementation steps of a special requirement type of self adhesive labels as opposed to the current procedures. It is about die-cutting a two-layer material that has significantly different degrees of compressibility on both sides. It is desired that only one of the layers to be penetrated by stamping. The article focuses on the main steps of the procedure, giving some guiding elements from the technological point of view. The article is accompanied by four annexes containing sketches of a magnetic rotary die cutting machine and pre-ordering sketches of a magnetic rotary die, and a draft order of such a die with the manufacturer’s main requirements of flexible dies. For a better understanding there is a draft of a label produced by using this procedure at the end of the article.

Key words: labels, rotary die-cutting, flexible die, magnetic cylinder, blade, cutting edge angle.

pp. 179-187 View full text

Calculus algorithm for evaluation of gravitational and inertial loads acting on a SCARA industrial robot in pick and place applications

Adrian Florin NICOLESCU^1,*, Cezara Georgia COMAN², Cozmin Adrian CRISTOIU³

¹⁾Professor, PhD, Machines and Manufacturing Systems Department, University "Politehnica" of Bucharest, Romania

²⁾Lecturer, PhD, Machines and Manufacturing Systems Department, University "Politehnica" of Bucharest, Romania

²⁾Assist. Prof., PhD Student, Machines and Manufacturing Systems Department, University "Politehnica" of Bucharest, Romania

Abstract: In this paper a calculus methodology for optimal structure design of numerically controled (NC) axes of SCARA industrial robot (IR) is presented. Besides identification of optimal structure, also a performance check is presented correlated with performances desired to be achieved by the overall assembly of the robot. Such calculus methodology can be applied in conceptual design and optimization of mechanical structure for new robot prototypes (but with similar structure) or for correct identification of constructive robot variant or right constructive and functional parameters of a robot for a particular robotic application.

Key words: industrial robot, SCARA, calculus methodology, optimal structure.

pp. 188-195 View full text

Calculus algorithm for evaluation of gravitational and inertial loads acting on a 6 DOF articulated arm type industrial robot

Cezara Georgia COMAN^1,*, Adrian Florin NICOLESCU², Cozmin Adrian CRISTOIU³

¹⁾Lecturer, PhD, Machines and Manufacturing Systems Department, University "Politehnica" of Bucharest, Romania

²⁾Professor, PhD, Machines and Manufacturing Systems Department, University "Politehnica" of Bucharest, Romania

²⁾Assist. Prof., PhD Student, Machines and Manufacturing Systems Department, University "Politehnica" of Bucharest, Romania

Abstract: This paper is presenting a calculus methodology that may be used in conceptual design and mechanical structure optimization for developing new articulated arm industrial robots (IR) with 6 degrees of freedom (DOF). In the mean time this methodology offers the possibility to identify an optimal structure for the robot having the ability to do a performance check correlated with performances intended to be achieved by the robot within the application that it needs to be integrated.

Key words: industrial robot, articulated arm, calculus methodology, optimal structure.

Electronic mail: orgcom@icmas.eu

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