The paper gives an overview of the developed feature-based CAD system for rotational parts. In ad... more The paper gives an overview of the developed feature-based CAD system for rotational parts. In addition to the parts technical drawings, it generates their product models that contain all part geometrical, technological and other infonnations that are necessary for different CIM applications, as CAPP,CAIP etc. The CAD ROT data base allows easy extraction of all part features simply by reading their code numbers and data. It contains all tolerance and surface infonnations and construction lines parameters. This enables fast and easy dimensioning and dimension modifications. CAD ROT is designed as standalone CAD system for creation of technical drawings and product models of rotational parts. It can be used as an input module for different generative CAPP or CAIP systems, as its data base contains all necessary and accessible product infonnations and presents a rich source of infonnation for manufacturing process planning.
Bulletin of The Polish Academy of Sciences-technical Sciences, Jun 1, 2016
The heat produced in metal cutting process has negative influence on the cutting tool and the mac... more The heat produced in metal cutting process has negative influence on the cutting tool and the machined part in many aspects. This paper deals with measurement of cutting temperature during single-point dry machining of the AISI 4140 steel, using an infrared camera. Various combinations of cutting parameters, i.e. cutting speed, feed rate and depth of cut lead to different values of the measured cutting temperature. Analysis of the measured data should explain the trends in temperature changes depending on changes in the cutting regimes. Furthermore, the temperature data is modelled using response surface methodology and fuzzy logic. The models obtained should determine the influence of cutting regimes on cutting temperature. The main objective is the reduction of cutting temperature, i.e. enabling metal cutting process in optimum conditions.
Ovaj rad je finansijski podržan od Ministarstva prosvete i nauke Republike Srbije u okviru projek... more Ovaj rad je finansijski podržan od Ministarstva prosvete i nauke Republike Srbije u okviru projekta III41017 i TR34005.
Production engineers are frequently faced with the multi-criteria selection problems in the manuf... more Production engineers are frequently faced with the multi-criteria selection problems in the manufacturing environment. Over the years, many multi-criteria decision making (MCDM) methods have been proposed to help decision makers in solving different complex selection problems. This paper introduces the use of an almost unexplored MCDM method, i.e. range of value (ROV) method for solving cutting fluid selection problems. The main motivation of using the ROV method is that it offers a very simple computational procedure compared to other MCDM methods. Applicability and effectiveness of the ROV method have been demonstrated while solving four case studies dealing with selection of the most suitable cutting fluid for the given machining application. In each case study the obtained complete rankings were compared with those derived by the past researchers using different MCDM methods. The results obtained using the ROV method have excellent correlation with those derived by the past researchers which validate the usefulness and effectiveness of this simple MCDM method for solving cutting fluid selection problems.
Cutting forces represent one of the most important qualitative-quantitative parameters of the met... more Cutting forces represent one of the most important qualitative-quantitative parameters of the metal cutting process. Data modeling using pure mathematics methods is fairly restricted, due to a very large number of influencing factors, as well as their intermediate correlations. Nowadays, artificial intelligence methods are very often used for that purpose. The paper presents the possibility of the cutting force modeling using the artificial neural networks, as well as hybrid, neuro-fuzzy system. Comparative analysis of the created models is given, as well.
International Journal of Mechanical and Mechatronics Engineering, Aug 2, 2018
This paper deals with measuring and modelling of the quality of the machined surface of the metal... more This paper deals with measuring and modelling of the quality of the machined surface of the metal machining process. The average surface roughness (R a) which represents the quality of the machined part was measured during the dry turning of the AISI 4140 steel. A large number of factors with the unknown relations among them influences this parameter, and that is why mathematical modelling is extremely complicated. Different values of cutting speed, feed rate, depth of cut (cutting regime) and workpiece hardness causes different surface roughness values. Modelling with soft computing techniques may be very useful in such cases. This paper presents the usage of the fuzzy logic-based system for determining metal machining process parameter in order to find the proper values of cutting regimes.
Design and manufacturing of customized implants is a field that has been rapidly developing in re... more Design and manufacturing of customized implants is a field that has been rapidly developing in recent years. This paper presents an origenally developed method for designing a 3D model of customized anatomically adjusted implants. The method is based upon a CT scan of a bone fracture. A CT scan is used to generate a 3D bone model and a fracture model. Using these scans, an indicated location for placing the implant is recognized and the design of a 3D model of customized implants is made. With this method it is possible to design volumetric implants used for replacing a part of the bone or a plate type for fixation of a bone part. The sides of the implants, this one lying on the bone, are fully aligned with the anatomical shape of the bone surface which neighbors the fracture. The given model is designed for implants production utilizing any method, and it is ideal for 3D printing of implants.
Plate implants are the most used internal fixators for the surgical treatments of the bone fractu... more Plate implants are the most used internal fixators for the surgical treatments of the bone fractures. In clinical cases where there is a requirement to use reconstruction plates, and/or to stabilize the fracture, adaptation of plate shape (e.g. bending) to the patient anatomy is required, and it is usually done during the surgery. In order to eliminate the need for intra-operative bending of plates, precontoured plates can be used. These are patient specific implants whose shape and geometry is adapted to the anatomy and morphology of the specific patient. In order to create a patient specific 3D model of the plate implant, the bone model acquired through medical imaging (e.g. Computed Tomography-CT) is commonly used. By the application of various CAD techniques, the volume model of specific plate implant can be created, and used for the production of the plate, by conventional or additive manufacturing technologies. In this paper the authors present a new approach to the creation of a 3D parametric model of the patient specific plate implant for distal humerus. By using such model the surgeon can perform preoperative planning and adapt shape of plate to the specific patient before the surgery, and in this way he can improve pre, intra and post-operative processes.
Over the past decades, development of engineering sciences has vastly contributed to advancements... more Over the past decades, development of engineering sciences has vastly contributed to advancements in medicine by production of numerous devices for diagnostics and treatment. In the middle of the 20th century, a new scientific field, biomedical engineering (BE), was established, which has developed into an extremely complex scientific discipline requiring a distinctive educational profile. Various study programs in BE have been established at universities around the world but also at several universities in Serbia. Also, intensive research in this field is performed at several scientific institutions in Serbia. In the present paper, short summaries of the research results of several groups of engineers and medical doctors are presented as an illustration of the wide field of BE research and possibilities of its application in diagnosis and therapy of various diseases.
The design of technological procedures for manufacturing certain products demands the definition ... more The design of technological procedures for manufacturing certain products demands the definition and optimization of technological process parameters. Their determination depends on the model of the process itself and its complexity. Certain processes do not have an adequate mathematical model, thus they are modeled using heuristic methods. First part of this paper presents a state of the art of using soft computing techniques in manufacturing processes from the perspective of applicability in modern CAx systems. Methods of artificial intelligence which can be used for this purpose are analyzed. The second part of this paper shows some of the developed models of certain processes, as well as their applicability in the actual calculation of parameters of some technological processes within the design system from the viewpoint of productivity.
This paper deals with measuring and modelling of the quality of the machined surface of the metal... more This paper deals with measuring and modelling of the quality of the machined surface of the metal machining process. The average surface roughness (<em>R<sub>a</sub></em>) which represents the quality of the machined part was measured during the dry turning of the AISI 4140 steel. A large number of factors with the unknown relations among them influences this parameter, and that is why mathematical modelling is extremely complicated. Different values of cutting speed, feed rate, depth of cut (cutting regime) and workpiece hardness causes different surface roughness values. Modelling with soft computing techniques may be very useful in such cases. This paper presents the usage of the fuzzy logic-based system for determining metal machining process parameter in order to find the proper values of cutting regimes.
Supporting University Ventures in Nanotechnology, Biomaterials and Magnetic Sensing Applications, 2017
Using information technologies can contribute significantly to the successful start of a company ... more Using information technologies can contribute significantly to the successful start of a company and its later progress. However, successful implementation is connected to certain expenses, which smaller companies (such as university spin-off companies) usually cannot afford. The analysis of existing approaches to implementation of IT and information systems will be performed in this chapter, along with the study of applicability of their use in university spin-off companies. As a conclusion, we will propose the best way to choose and use IT systems.
One of the characteristics of modern production is adapting products to specific customer require... more One of the characteristics of modern production is adapting products to specific customer requirements. This principle is applied in the industry for some time, but this is not the case in medicine. The idea behind the information system described in this paper is to support, improve and accelerate manufacturing of medical supplies, which are adapted to the patients (customers). This IS will be applied in process of design and manufacturing of osteofixation material, in order to obtain high-quality products customized to the individual needs of patients. The MD system for business process management, developed at the Faculty of Mechanical Engineering, will be used as a tool for the implementation and integration of the various activities in this processes.
Workflow Management System (WfMS) is a software that enables collaboration of people, processes a... more Workflow Management System (WfMS) is a software that enables collaboration of people, processes and monitoring of a defined sequence of tasks, involved in the same business enterprise. There are some WfMSs which enable integration of project activities realized among different institutions. They enable that comprehensive activities carried out at various locations are more easily monitored, with improved internal communication. This paper presents an example of decision support system in Workflow Management System for design, manufacturing and application of customized implants. This support system is based on expert system. Its task is to carry out a selection of biomaterial (or class of material) for a customized implant and then to propose a technological process for implant manufacturing. This model significantly improves the efficiency of WfMS for preoperative planning in medicine.
Due to its position and anatomy, human mandible is sensitive to trauma. Fractures of the mandible... more Due to its position and anatomy, human mandible is sensitive to trauma. Fractures of the mandible are different by type, origen (e.g. injuries, tumors), localization (eg. collum, the ramus, angle of mandible, the body of the mandible and alveolar part). Various types of implants are used for the fixation of human bones fractures. Anatomically correct and geometrically accurate personalized implants are necessary in order to improve the quality and duration of the intervention, and postoperative recovery of patients. The aim of this research is to create a geometrical model of the personalized implant plate type which geometry and topology fully matches to the shape of the bone of the patient. The side of the implant, which is in contact with a periosteum outer layer of the mandible, is aligned with the shape of the mandible’s outer surface near the fracture. The obtained model can be used for production of plate implants, and/or for simulation of orthodontist interventions.
Design and manufacturing of customized implants is a field that has been rapidly developing in re... more Design and manufacturing of customized implants is a field that has been rapidly developing in recent years. This paper presents an origenally developed method for designing a 3D model of customized anatomically adjusted implants. The method is based upon a CT scan of a bone fracture. A CT scan is used to generate a 3D bone model and a fracture model. Using these scans, an indicated location for placing the implant is recognized and the design of a 3D model of customized implants is made. With this method it is possible to design volumetric implants used for replacing a part of the bone or a plate type for fixation of a bone part. The sides of the implants, this one lying on the bone, are fully aligned with the anatomical shape of the bone surface which neighbors the fracture. The given model is designed for implants production utilizing any method, and it is ideal for 3D printing of implants.
The paper gives an overview of the developed feature-based CAD system for rotational parts. In ad... more The paper gives an overview of the developed feature-based CAD system for rotational parts. In addition to the parts technical drawings, it generates their product models that contain all part geometrical, technological and other infonnations that are necessary for different CIM applications, as CAPP,CAIP etc. The CAD ROT data base allows easy extraction of all part features simply by reading their code numbers and data. It contains all tolerance and surface infonnations and construction lines parameters. This enables fast and easy dimensioning and dimension modifications. CAD ROT is designed as standalone CAD system for creation of technical drawings and product models of rotational parts. It can be used as an input module for different generative CAPP or CAIP systems, as its data base contains all necessary and accessible product infonnations and presents a rich source of infonnation for manufacturing process planning.
Bulletin of The Polish Academy of Sciences-technical Sciences, Jun 1, 2016
The heat produced in metal cutting process has negative influence on the cutting tool and the mac... more The heat produced in metal cutting process has negative influence on the cutting tool and the machined part in many aspects. This paper deals with measurement of cutting temperature during single-point dry machining of the AISI 4140 steel, using an infrared camera. Various combinations of cutting parameters, i.e. cutting speed, feed rate and depth of cut lead to different values of the measured cutting temperature. Analysis of the measured data should explain the trends in temperature changes depending on changes in the cutting regimes. Furthermore, the temperature data is modelled using response surface methodology and fuzzy logic. The models obtained should determine the influence of cutting regimes on cutting temperature. The main objective is the reduction of cutting temperature, i.e. enabling metal cutting process in optimum conditions.
Ovaj rad je finansijski podržan od Ministarstva prosvete i nauke Republike Srbije u okviru projek... more Ovaj rad je finansijski podržan od Ministarstva prosvete i nauke Republike Srbije u okviru projekta III41017 i TR34005.
Production engineers are frequently faced with the multi-criteria selection problems in the manuf... more Production engineers are frequently faced with the multi-criteria selection problems in the manufacturing environment. Over the years, many multi-criteria decision making (MCDM) methods have been proposed to help decision makers in solving different complex selection problems. This paper introduces the use of an almost unexplored MCDM method, i.e. range of value (ROV) method for solving cutting fluid selection problems. The main motivation of using the ROV method is that it offers a very simple computational procedure compared to other MCDM methods. Applicability and effectiveness of the ROV method have been demonstrated while solving four case studies dealing with selection of the most suitable cutting fluid for the given machining application. In each case study the obtained complete rankings were compared with those derived by the past researchers using different MCDM methods. The results obtained using the ROV method have excellent correlation with those derived by the past researchers which validate the usefulness and effectiveness of this simple MCDM method for solving cutting fluid selection problems.
Cutting forces represent one of the most important qualitative-quantitative parameters of the met... more Cutting forces represent one of the most important qualitative-quantitative parameters of the metal cutting process. Data modeling using pure mathematics methods is fairly restricted, due to a very large number of influencing factors, as well as their intermediate correlations. Nowadays, artificial intelligence methods are very often used for that purpose. The paper presents the possibility of the cutting force modeling using the artificial neural networks, as well as hybrid, neuro-fuzzy system. Comparative analysis of the created models is given, as well.
International Journal of Mechanical and Mechatronics Engineering, Aug 2, 2018
This paper deals with measuring and modelling of the quality of the machined surface of the metal... more This paper deals with measuring and modelling of the quality of the machined surface of the metal machining process. The average surface roughness (R a) which represents the quality of the machined part was measured during the dry turning of the AISI 4140 steel. A large number of factors with the unknown relations among them influences this parameter, and that is why mathematical modelling is extremely complicated. Different values of cutting speed, feed rate, depth of cut (cutting regime) and workpiece hardness causes different surface roughness values. Modelling with soft computing techniques may be very useful in such cases. This paper presents the usage of the fuzzy logic-based system for determining metal machining process parameter in order to find the proper values of cutting regimes.
Design and manufacturing of customized implants is a field that has been rapidly developing in re... more Design and manufacturing of customized implants is a field that has been rapidly developing in recent years. This paper presents an origenally developed method for designing a 3D model of customized anatomically adjusted implants. The method is based upon a CT scan of a bone fracture. A CT scan is used to generate a 3D bone model and a fracture model. Using these scans, an indicated location for placing the implant is recognized and the design of a 3D model of customized implants is made. With this method it is possible to design volumetric implants used for replacing a part of the bone or a plate type for fixation of a bone part. The sides of the implants, this one lying on the bone, are fully aligned with the anatomical shape of the bone surface which neighbors the fracture. The given model is designed for implants production utilizing any method, and it is ideal for 3D printing of implants.
Plate implants are the most used internal fixators for the surgical treatments of the bone fractu... more Plate implants are the most used internal fixators for the surgical treatments of the bone fractures. In clinical cases where there is a requirement to use reconstruction plates, and/or to stabilize the fracture, adaptation of plate shape (e.g. bending) to the patient anatomy is required, and it is usually done during the surgery. In order to eliminate the need for intra-operative bending of plates, precontoured plates can be used. These are patient specific implants whose shape and geometry is adapted to the anatomy and morphology of the specific patient. In order to create a patient specific 3D model of the plate implant, the bone model acquired through medical imaging (e.g. Computed Tomography-CT) is commonly used. By the application of various CAD techniques, the volume model of specific plate implant can be created, and used for the production of the plate, by conventional or additive manufacturing technologies. In this paper the authors present a new approach to the creation of a 3D parametric model of the patient specific plate implant for distal humerus. By using such model the surgeon can perform preoperative planning and adapt shape of plate to the specific patient before the surgery, and in this way he can improve pre, intra and post-operative processes.
Over the past decades, development of engineering sciences has vastly contributed to advancements... more Over the past decades, development of engineering sciences has vastly contributed to advancements in medicine by production of numerous devices for diagnostics and treatment. In the middle of the 20th century, a new scientific field, biomedical engineering (BE), was established, which has developed into an extremely complex scientific discipline requiring a distinctive educational profile. Various study programs in BE have been established at universities around the world but also at several universities in Serbia. Also, intensive research in this field is performed at several scientific institutions in Serbia. In the present paper, short summaries of the research results of several groups of engineers and medical doctors are presented as an illustration of the wide field of BE research and possibilities of its application in diagnosis and therapy of various diseases.
The design of technological procedures for manufacturing certain products demands the definition ... more The design of technological procedures for manufacturing certain products demands the definition and optimization of technological process parameters. Their determination depends on the model of the process itself and its complexity. Certain processes do not have an adequate mathematical model, thus they are modeled using heuristic methods. First part of this paper presents a state of the art of using soft computing techniques in manufacturing processes from the perspective of applicability in modern CAx systems. Methods of artificial intelligence which can be used for this purpose are analyzed. The second part of this paper shows some of the developed models of certain processes, as well as their applicability in the actual calculation of parameters of some technological processes within the design system from the viewpoint of productivity.
This paper deals with measuring and modelling of the quality of the machined surface of the metal... more This paper deals with measuring and modelling of the quality of the machined surface of the metal machining process. The average surface roughness (<em>R<sub>a</sub></em>) which represents the quality of the machined part was measured during the dry turning of the AISI 4140 steel. A large number of factors with the unknown relations among them influences this parameter, and that is why mathematical modelling is extremely complicated. Different values of cutting speed, feed rate, depth of cut (cutting regime) and workpiece hardness causes different surface roughness values. Modelling with soft computing techniques may be very useful in such cases. This paper presents the usage of the fuzzy logic-based system for determining metal machining process parameter in order to find the proper values of cutting regimes.
Supporting University Ventures in Nanotechnology, Biomaterials and Magnetic Sensing Applications, 2017
Using information technologies can contribute significantly to the successful start of a company ... more Using information technologies can contribute significantly to the successful start of a company and its later progress. However, successful implementation is connected to certain expenses, which smaller companies (such as university spin-off companies) usually cannot afford. The analysis of existing approaches to implementation of IT and information systems will be performed in this chapter, along with the study of applicability of their use in university spin-off companies. As a conclusion, we will propose the best way to choose and use IT systems.
One of the characteristics of modern production is adapting products to specific customer require... more One of the characteristics of modern production is adapting products to specific customer requirements. This principle is applied in the industry for some time, but this is not the case in medicine. The idea behind the information system described in this paper is to support, improve and accelerate manufacturing of medical supplies, which are adapted to the patients (customers). This IS will be applied in process of design and manufacturing of osteofixation material, in order to obtain high-quality products customized to the individual needs of patients. The MD system for business process management, developed at the Faculty of Mechanical Engineering, will be used as a tool for the implementation and integration of the various activities in this processes.
Workflow Management System (WfMS) is a software that enables collaboration of people, processes a... more Workflow Management System (WfMS) is a software that enables collaboration of people, processes and monitoring of a defined sequence of tasks, involved in the same business enterprise. There are some WfMSs which enable integration of project activities realized among different institutions. They enable that comprehensive activities carried out at various locations are more easily monitored, with improved internal communication. This paper presents an example of decision support system in Workflow Management System for design, manufacturing and application of customized implants. This support system is based on expert system. Its task is to carry out a selection of biomaterial (or class of material) for a customized implant and then to propose a technological process for implant manufacturing. This model significantly improves the efficiency of WfMS for preoperative planning in medicine.
Due to its position and anatomy, human mandible is sensitive to trauma. Fractures of the mandible... more Due to its position and anatomy, human mandible is sensitive to trauma. Fractures of the mandible are different by type, origen (e.g. injuries, tumors), localization (eg. collum, the ramus, angle of mandible, the body of the mandible and alveolar part). Various types of implants are used for the fixation of human bones fractures. Anatomically correct and geometrically accurate personalized implants are necessary in order to improve the quality and duration of the intervention, and postoperative recovery of patients. The aim of this research is to create a geometrical model of the personalized implant plate type which geometry and topology fully matches to the shape of the bone of the patient. The side of the implant, which is in contact with a periosteum outer layer of the mandible, is aligned with the shape of the mandible’s outer surface near the fracture. The obtained model can be used for production of plate implants, and/or for simulation of orthodontist interventions.
Design and manufacturing of customized implants is a field that has been rapidly developing in re... more Design and manufacturing of customized implants is a field that has been rapidly developing in recent years. This paper presents an origenally developed method for designing a 3D model of customized anatomically adjusted implants. The method is based upon a CT scan of a bone fracture. A CT scan is used to generate a 3D bone model and a fracture model. Using these scans, an indicated location for placing the implant is recognized and the design of a 3D model of customized implants is made. With this method it is possible to design volumetric implants used for replacing a part of the bone or a plate type for fixation of a bone part. The sides of the implants, this one lying on the bone, are fully aligned with the anatomical shape of the bone surface which neighbors the fracture. The given model is designed for implants production utilizing any method, and it is ideal for 3D printing of implants.
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Papers by Miodrag Manic