Loading...
Search for:
computer-aided-manufacturing
0.03 seconds
Total 39 records
A Novel Digital Dentistry Platform Based on Cloud Manufacturing Paradigm
, Ph.D. Dissertation Sharif University of Technology ; Houshmand, Mahmoud (Supervisor) ; Fatahi Valilai, Omid (Supervisor) ; Vasegh, Zahra (Supervisor)
Abstract
This thesis has developed a novel platform for digital dentistry which facilitates the interoperability among different digital components and improves digital workflow in a collaborative environment. The platform is inspired by the cloud manufacturing paradigm for enabling the interoperability and collaboration management and also applies the DICOM standard to improve the integration for the coordination among the different stakeholders for better sharing of their resources while they are geographically distributed. The paper has proposed the application of the PACS concept to include design, implant planning, process planning and production workstations. The paper has conducted a...
Application of Knowledge-based Systems (kbs) in Exchange and Integration Manufacturing Systems Information with Cloud Manufacturing Approach (In Case Cooling Tower)
, M.Sc. Thesis Sharif University of Technology ; Houshmand, Mahmoud (Supervisor)
Abstract
Product knowledge is the most precious asset of any manufacturing company, particularly for OKP companies. High level of customization is one characteristic of OKP which means more customer involvements in OKPPD activities, and customer requirements and expectations may be changing at any activity in PD, e.g., at designing stage. As SMEs, OKP companies always have limitation in resources such as machines tools, human resources, cutters, clamps, so managing the limitations is one of the major challenges that must be faced for maximizing the efficiently and productivity. The part of design that involves fuzzy problems and a lot of product knowledge, it is a critical part for the entire PD. In...
A Novel Framework to Enable Optimum Feature based Process Planning based on STEP-NC Standard and CNC Machines
, M.Sc. Thesis Sharif University of Technology ; Houshmand, Mahmoud (Supervisor)
Abstract
In the domain of manufacturing, computer numerically controllers (CNC) technology is a major contributor to the production capacity of the enterprises. The advances in CNC technology coupled with enhancements in computing systems have provided the basis to re-examine the way in which computer-aided systems (CAx) can be used to enable global manufacturing. Interoperability of the various components of the CAx chain is therefore a major prerequisite for manufacturing enterprises for becoming strategically agile and consequently globally competitive. Being interoperable, resources can be utilized interchangeably in a plug-and-produce manner. Over the last 8years the eminence of a STEP...
A Novel System to Enable Interoperability Among Distributed CAM Software Packages and CNC Machining Post Processors
, M.Sc. Thesis Sharif University of Technology ; Houshmand, Mahmoud (Supervisor)
Abstract
Today’s businesses strategies are changing from traditional point of view to globalization and distributed enterprise. Companies have to consider flexibility in term of quantity and variety. They have to manage and organize the product development chain where low cost resources are available. Therefore, enterprises and companies should facilitate the flow of information and increase the interoperability between distributed agents. The main information flow occurs in CAD/CAM/CNC chain. Information flow at the end of the chain has always been the main obstacle to enable interoperability. Old Standards for programming CNC machine tools are the main problem to exchange data and facilitate...
C-MAN: a Novel Manufacturing Platform Based on Cloud Manufacturing Paradigm
, Ph.D. Dissertation Sharif University of Technology ; Houshmand, Mahmoud (Supervisor)
Abstract
The synergy of fundamental factors like changes in governmental policies, global expansions of the manufacturing industries and improvements in technology related to reliability of manufacturing information flow have created the global manufacturing revolution in the first years of the twenty-first century. The concept of global manufacturing enterprise potentially brings up benefits and opportunities for today’s manufacturing enterprises like reduction of manufacturing costs by utilizing low labor-cost countries, reduction of business risks and introduction of new markets as a new source for enterprise growth. However, it enforces enterprise to endure costs to adopt the global...
Integrated Process Planning System for Prismatic Parts Based on STEP
, M.Sc. Thesis Sharif University of Technology ; Houshmand, Mahmoud (Supervisor)
Abstract
Nowadays, as a result of rapid changes of market, it is necessary to reduce the period between design and manufacturing of a new product. Among them, process planning is one of the most difficult elements of production chain and also, there are a few numbers of experts in this field. In addition, this process is time-consuming and costly. So, it is important for companies to reduce the period of new product’s presentation by reduction of process planning duration. On the other hand, it is proved that the lowest level of integration in CIM systems is in CAPP section. Integration provides sharing data in the system, so the other parts of production systems can exchange product information and...
Integration of Design and Manufacturing Systems Using Neutral Data Structure
, Ph.D. Dissertation Sharif University of Technology ; Hooshmand, Mahmoud (Supervisor)
Abstract
In competitive environment of quick market changes, developing an interoperable manufacturing system is a necessity. Process planning as a connection link between design and manufacturing, has never been able to integrate these up/down stream activities and in spite of employing computer systems, CAPP’s information has been managed in an isolated manner. To realize interoperability, the exchange of part and product data must be independent of their platforms. There are two basic approaches for this purpose: i) Utilizing interface and ii) Utilizing neutral formats. STEP (Standard for the Exchange of Product data) plays a significant role as a neutral data model to integrate design,...
, M.Sc. Thesis Sharif University of Technology ; Hoshmand, Mahmoud (Supervisor)
Abstract
Integrated design includes CAD, process planning and CNC code generation based on an integrated data structure. To enable different CAD/CAM software solutions to be interoperable, it is required to support data exchange in manufacturing enterprises. To realize interoperability there are two basic approaches: i. to focus on STEP standard to support data exchange between CAD systems as well as CAPP/CAM and CNC machining systems; the use of STEP standard ensures the data integration based on STEP standard. ii. utilizing a platform consists of structures and procedures to enable exchange of data between different CAD/CAM/CAPP software applications seamlessly. In this article, the important...
A platform for optimisation in distributed manufacturing enterprises based on cloud manufacturing paradigm
, Article International Journal of Computer Integrated Manufacturing ; Vol. 27, Issue 11 , 2 November , 2014 , pp. 1031-1054 ; ISSN: 0951192X ; Houshmand, M ; Sharif University of Technology
Abstract
The synergy of fundamental factors like changes in governmental policies, global expansions of the manufacturing industries and improvements in technology related to reliability of manufacturing information flow have created the global manufacturing revolution in the first years of the twenty-first century. Although the concept of global manufacturing enterprise has created benefits and opportunities for todays manufacturing enterprises, it has enforced enterprises to endure costs to adopt the global manufacturing solutions. Besides, considering the researches aimed to enable the global manufacturing paradigm, there is still a need for efficient solutions to fulfil the global product...
Production planning and performance optimization of reconfigurable manufacturing systems using genetic algorithm
, Article International Journal of Advanced Manufacturing Technology ; Volume 54, Issue 1-4 , 2011 , Pages 373-392 ; 02683768 (ISSN) ; Houshmand, M ; Sharif University of Technology
Abstract
To stay competitive in the new dynamic market having large fluctuations in product demand, manufacturing companies must use systems that not only produce their goods with high productivity but also allow for rapid response to market changes. Reconfigurable manufacturing system (RMS) is a new paradigm that enables manufacturing systems to respond quickly and cost effectively to market demand. In other words, RMS is a system designed from the outset, for rapid changes in both hardware and software components, in order to quickly adjust its production capacity to fluctuations in market demand and adapt its functionality to new products. The effectiveness of an RMS depends on implementing its...
Depicting additive manufacturing from a global perspective; Using Cloud manufacturing paradigm for integration and collaboration
, Article Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture ; Volume 229, Issue 12 , September , 2015 , Pages 2216-2237 ; 09544054 (ISSN) ; Houshmand, M ; Sharif University of Technology
SAGE Publications Ltd
2015
Abstract
Globalization is one of the widely considered factors in today's manufacturing industries. This paradigm may be adopted for new technologies such as additive manufacturing. Additive manufacturing has been identified as an innovative manufacturing technology in recent years. The characteristics of this manufacturing technology, especially its support for quick design to manufacturing, have dominated it as an efficient generation of manufacturing techniques for today's global manufacturing paradigm. This article discusses the requirements and necessities of additive manufacturing with respect to a globalized perspective. Considering the two major requirements studied as integration of...
Cloud-Based Global Supply Chain: A Conceptual Model and Multilayer Architecture
, Article Journal of Manufacturing Science and Engineering, Transactions of the ASME ; Volume 137, Issue 4 , 2015 ; 10871357 (ISSN) ; Houshmand, M ; Valilai, O. F ; Sharif University of Technology
American Society of Mechanical Engineers (ASME)
2015
Abstract
The cloud manufacturing (C-Manufacturing) paradigm, as an advanced form of networked manufacturing, has recently been proposed based on a combination of existing manufacturing systems and emerging technologies, such as cloud computing, virtual manufacturing, agile manufacturing, manufacturing grid, Internet-of-things (IOT), and service-oriented technologies. In this study, through investigating the main goals of C-Manufacturing and today's hyper-competitive global marketplace circumstances, a prospective conceptual model called cloud-based global supply chain (CBGSC) has been developed which can overcome or mitigate the issues and risks associated with supply chain processes on a global...
Integration of simulation and fuzzy multi-attribute decision making for modelling and assessment of fuzzy parameters
, Article International Journal of Industrial and Systems Engineering ; Volume 6, Issue 4 , 2010 , Pages 483-502 ; 17485037 (ISSN) ; Seifoory, M ; Abbasi, M ; Sharif University of Technology
2010
Abstract
This article introduces a methodology to integrate fuzzy multiattribute decision making (FMADM) and fuzzy simulation. According to this method, a fuzzy simulation method is applied to study the effect of different alternative on system's performance and decision criteria taking into account fuzzy inputs. Using a fuzzy analytical hierarchy process (FAHP) and the results of fuzzy simulation, a FMADM is conducted to select the best alternative. This article introduces how to incorporate fuzzy set theory with discrete-event simulation in order to model uncertain activity duration in simulating a realworld system, especially when insufficient or no sample data are available. A case study is...
Development of a novel solution to enable integration and interoperability for cloud manufacturing
, Article 6th International Conference on Changeable, September 2016 through 6 September 2016 ; Volume 52 , 2016 , Pages 6-11 ; 22128271 (ISSN) ; Fatahi Valilai, Omid ; Sharif University of Technology
Elsevier B. V
Abstract
Nowadays, manufacturing enterprises have been faced with a globalized competitive environment. In this fierce condition, Cloud Manufacturing paradigm emerged as a promising concept for competition. It provides effective solutions and tools for manufacturing enterprises to collaborate in globalized market. The revolution that Cloud Manufacturing has created is based on the redefinition of the classic methods to those which are appropriate for todays' modern and globalized manufacturing environments. In parallel with cloud-based revolution, the expansion of internet-based technologies has been started. These technologies previously have been applied in many fields and resulted in...
Configuration design in scalable reconfigurable manufacturing systems (RMS); a case of single-product flow line (SPFL)
, Article International Journal of Production Research ; 2017 , Pages 1-23 ; 00207543 (ISSN) ; Houshmand, M ; Fatahi Valilai, O ; Sharif University of Technology
Abstract
The dynamic nature of today’s manufacturing industry, which is caused by the intense global competition and constant technological advancements, requires systems that are highly adaptive and responsive to demand fluctuations. Reconfigurable manufacturing systems (RMS) enable such responsiveness through their main characteristics. This paper addresses the problem of RMS configuration design, where the demand of a single product varies throughout its production life cycle, and the system configuration must change accordingly to satisfy the required demand with minimum cost. A two-phased method is developed to handle the primary system configuration design and the necessary system...
Cloud manufacturing service selection optimization and scheduling with transportation considerations: mixed-integer programming models
, Article International Journal of Advanced Manufacturing Technology ; 2017 , Pages 1-28 ; 02683768 (ISSN) ; Houshmand, M ; Van Woensel, T ; Mutlu, N ; Sharif University of Technology
Abstract
Cloud manufacturing is an emerging service-oriented manufacturing paradigm that integrates and manages distributed manufacturing resources through which complex manufacturing demands with a high degree of customization can be fulfilled. The process of service selection optimization and scheduling (SSOS) is an important issue for practical implementation of cloud manufacturing. In this paper, we propose new mixed-integer programming (MIP) models for solving the SSOS problem with basic composition structures (i.e., sequential, parallel, loop, and selective). Through incorporation of the proposed MIP models, the SSOS with a mixed composition structure can be tackled. As transportation is...
An imperialist competitive algorithm for service composition and optimal selection in cloud manufacturing
, Article 5th International Symposium on Computational and Business Intelligence, ISCBI 2017, 11 August 2017 through 14 August 2017 ; 2017 , Pages 129-133 ; 9781538617717 (ISBN) ; Houshmand, M ; Kerdegari, A ; Sharif University of Technology
Abstract
Cloud manufacturing is an emerging service-oriented manufacturing paradigm that integrates and manages distributed manufacturing resources through which complex manufacturing demands with a high degree of customization can be fulfilled. The process of Service Composition and Optimal Selection (SCOS) is an important issue for practical implementation of cloud manufacturing. In this paper, a new Mixed Integer Programming (MIP) model for solving the SCOS with transportation consideration has been proposed. This model minimizes both manufacturing and transportation costs subject to some constraints such as necessity of transportation between manufacturing resources and the requirements specified...
A novel solution for manufacturing interoperability fulfillment using interoperability service providers
, Article 50th CIRP Conference on Manufacturing Systems, CIRP CMS 2017, 3 May 2017 through 5 May 2017 ; Volume 63 , 2017 , Pages 774-779 ; 22128271 (ISSN) ; Fatahi Valilai, O ; Sharif University of Technology
Elsevier B.V
2017
Abstract
The cloud manufacturing paradigm has been known as one of the best solutions for today's competitive manufacturing environments. This paradigm insists on using a manufacturing service oriented approach for fulfilling the manufacturing enterprise resource management by the access to global availability of manufacturing services. The proposed service oriented approach covers a wide area of manufacturing resource management from infrastructures to platforms and applications. However, due to wide global distributions of manufacturing clouds, the service oriented architectures which are designed in the clouds cannot communicate with each other. This is mainly due to concentration of cloud...
Configuration design in scalable reconfigurable manufacturing systems (RMS); a case of single-product flow line (SPFL)
, Article International Journal of Production Research ; Volume 56, Issue 11 , 2018 , Pages 3932-3954 ; 00207543 (ISSN) ; Houshmand, M ; Fatahi Valilai, O ; Sharif University of Technology
Taylor and Francis Ltd
2018
Abstract
The dynamic nature of today’s manufacturing industry, which is caused by the intense global competition and constant technological advancements, requires systems that are highly adaptive and responsive to demand fluctuations. Reconfigurable manufacturing systems (RMS) enable such responsiveness through their main characteristics. This paper addresses the problem of RMS configuration design, where the demand of a single product varies throughout its production life cycle, and the system configuration must change accordingly to satisfy the required demand with minimum cost. A two-phased method is developed to handle the primary system configuration design and the necessary system...
Cloud manufacturing service selection optimization and scheduling with transportation considerations: mixed-integer programming models
, Article International Journal of Advanced Manufacturing Technology ; Volume 95, Issue 1-4 , 2018 , Pages 43-70 ; 02683768 (ISSN) ; Houshmand, M ; van Woensel, T ; Mutlu, N ; Sharif University of Technology
Springer London
2018
Abstract
Cloud manufacturing is an emerging service-oriented manufacturing paradigm that integrates and manages distributed manufacturing resources through which complex manufacturing demands with a high degree of customization can be fulfilled. The process of service selection optimization and scheduling (SSOS) is an important issue for practical implementation of cloud manufacturing. In this paper, we propose new mixed-integer programming (MIP) models for solving the SSOS problem with basic composition structures (i.e., sequential, parallel, loop, and selective). Through incorporation of the proposed MIP models, the SSOS with a mixed composition structure can be tackled. As transportation is...