Optimization Model for Machining Processes Design in Flexible Manufacturing Systems

2018 ◽  
Vol 17 (02) ◽  
pp. 137-153 ◽  
Author(s):  
Ljubomir Lukic ◽  
Mirko Djapic ◽  
Cristiano Fragassa ◽  
Ana Pavlovic
Keyword(s):  
Flexible Manufacturing ◽  
Manufacturing Systems ◽  
Numerical Control ◽  
Production Costs ◽  
Optimization Strategy ◽  
Technological Parameters ◽  
Machining Processes ◽  
Machining Center ◽  
Broad Array ◽  
Set Up

Engineering machining processes realized in flexible machining systems is a highly complex task, especially since it encompasses complex optimization procedures apart from engineering. For a broad array of different workpieces produced in different series it is very difficult to engineer a manufacturing process for attaining maximum processing productivity with minimal production costs. This paper presents a developed postprocessor model enabling automatic generating of the numerical control code for all programs executed simultaneously in the production process on a greater number of machining centers. The model engrosses the different variants of tools in a machining center magazine, a different combination of elements of the machining mode, possibility of the most favorable layout of workpieces on pallets, compliance with the technological requirements in terms of simultaneous tool changes in machining center magazines, the required total processing time and minimal production costs. To that aim has been developed the postprocessor generator, as a program and software system, enabling all programs to be automatically updated based on the set up optimization strategy from tool changes, changes in cutting mode elements and technological operations. Such updated programs contain optimal technological parameters and provide minimal costs of production while at the same time the maximum utilization of tools during manufacture at an exactly specified time.

scholarly journals DEVELOPMENT OF AN AUTOMATED DESIGN SYSTEM FOR FLEXIBLE AUTOMATED PRODUCTION

2021 ◽  
Vol 5 (3) ◽  
Author(s):  
Еvhen PUKHOVSKYY
Keyword(s):  
Flexible Manufacturing ◽  
Manufacturing Systems ◽  
Automated Design ◽  
Numerical Control ◽  
Design System ◽  
Automation System ◽  
Mathematical Methods ◽  
Integrated Automation System ◽  
Design Systems ◽  
Production Preparation

Design of flexible manufacturing  systems (FMS) of modern multi-level production is usually carried out on the basis of general rationing when using large recommendations.  At the same time, the specifics and features of a particular production are not always taken into account.  In such a design, the most important is the experience of the designer, which is not always based on modern methods of optimizing project solutions.  Therefore, the problem of creating automated design systems in the development of flexible automated productions (FAP), which use cost equipment with numerical control (CNC) is extremely urgent.    The development of automated design systems is based on the ideas of a systematic approach that determine different cycles of the process: design - production preparation - production. Information about the projected object is generated in the process of project development by different groups of users: researchers, designers, designers, technologists, production organizers. A multilevel, cyclical design process requires the use of such a volume of information that cannot be processed without the use of modern mathematical methods and calculated equipment. Therefore, it is extremely important to create automated gap design systems, which are marked by greater versatility, efficiency and possibility of development, improvement and adaptation to the conditions of various enterprises. Such requirements served as the basis for the creation of an automated design  system  , which allows to take into account a huge amount of information in the automatic cycle during the development of the project. The scientific novelty of the work is the development of an integrated automation system for the design of processing technology and the selection of elements of  FMS structures. At the same time, information unity with the system of technological training of production at the level of operation of  FMS is ensured.

scholarly journals Diseño e implementación de una Interfaz de Control para la Integración de una Celda de Manufactura Flexible

2019 ◽  
pp. 23-28
Author(s):  
Juan Carlos Rojas-Garnica ◽  
José Lorenzo Muñoz-Mata ◽  
Carlos Rangel-Romero ◽  
Alma Delia Ocotitla-Muñoz
Keyword(s):  
Flexible Manufacturing ◽  
Flexible Manufacturing Systems ◽  
Manufacturing Systems ◽  
Communication Protocol ◽  
Communication Interface ◽  
Flexible Manufacturing Cell ◽  
Manufacturing Cell ◽  
Machining Center ◽  
Increase Productivity ◽  
Different Parts

In modern industry, flexible manufacturing systems (FMS) are indispensable to increase productivity and product quality. The cells that constitute them have several work stations connected to each other through a communication protocol, therefore, with which they are able to identify and distinguish between the different parts or products processed in the system. Furthermore, they have the ability of adaptation to the demand of processing different products and quantities. In the FMS communication protocols are used such as Device Net, Ethernet, among others. However, there are cases in which there are no communication modules; however, it is necessary to develop alternative devices to communicate the work stations with each other to integrate a flexible manufacturing cell with the necessary characteristics. This paper presents the results obtained from the study of infrastructure for the development of a communication interface to integrate a flexible manufacturing cell using a microcontroller, with the capability of communicating two work stations. In this particular case, a FANUC M6iB robot with a HAAS VF2 machining center.

AGV System with Dual Motor Drive by Distributed Control

2005 ◽  
Vol 297-300 ◽  
pp. 2297-2302
Author(s):  
Yon Sang Cho ◽  
Sung Jae Jun ◽  
Heung Sik Park
Keyword(s):  
Distributed Control ◽  
Flexible Manufacturing ◽  
Manufacturing Systems ◽  
Motor Drive ◽  
Main Host ◽  
Main Computer ◽  
External Assistance ◽  
Self Powered ◽  
Set Up ◽  
Agv Systems

With the recent progress in flexible manufacturing systems (FMS) in industry, increasing attention has been given to Automatic Guided Vehicle (AGV) systems. An AGV is a self-powered unit for transporting materials between stations without needing to be controlled by an operator. Such a system has several sensors to recognize the external state, and it is designed to travel between stations without external assistance. To manage each device quickly and independently it requires a distributed controller with a main computer as the host, as well as a number of micro-controllers. In this study, an AGV system with dual motor drive was constructed. A Pentium 4 personal computer was set up as the main host for the distributed control, and this communicated with other micro-controllers in the management of the motor. The speed of each motor was also controlled by a micro-controller.

Operational Production Structures Used in the Multi-Serving System

2012 ◽  
pp. 398-422
Author(s):  
I. C. Dima ◽  
Jozef Novac-Marcincin
Keyword(s):  
Flexible Manufacturing ◽  
Machine Tools ◽  
Manufacturing Systems ◽  
Flow Line ◽  
Labour Force ◽  
Industrial Robots ◽  
Technological Parameters ◽  
Manufacturing Cells ◽  
Organisational Form ◽  
Discontinuous Flow

In terms of organisation, the production achieved by polyservice of machines and equipment implies the existence of some independent organisational links. The organisation of the polyservice activity by departments and workshops inside of which great importance should be given to the system of grouping the machines and equipment, studying the optimal conditions to locate them. Organising the production by single or multiple object, continuous or discontinuous flow, manufacturing lines takes into account: the parameters of the flow line, parameters concerning the labour force, the parameters of the machine-tools, technological parameters, etc. Another form of organising the production obtained through polyservice is the production departments in the composition of which there are numerically and automatically controlled machine tools. Organising the production obtained through polyservice may also be done in production departments, in the composition of which there are the transfer machine-tools, processing centres, and manufacturing cells. Organising the flexible manufacturing systems takes into account: the number of benchmarks that will be processed, reduction of the duration to design and make new products, typification and modulation of SDVs, equipping the machines and equipment with standardised SDVs, etc. The most efficient organisational form is the production departments in the composition of which there are the flexible manufacturing cells provided with industrial robots.

Manufacturing Processes Analysis by Virtual Reality

2006 ◽  
Vol 526 ◽  
pp. 139-144 ◽  
Author(s):  
Alfredo Sanz ◽  
E.M. Rubio Alvir ◽  
Carmen Martínez Murillo ◽  
M.A. Sebastián
Keyword(s):  
Virtual Reality ◽  
Flexible Manufacturing ◽  
Machine Tools ◽  
Manufacturing Systems ◽  
Numerical Control ◽  
Manufacturing Processes ◽  
Automated Manufacturing ◽  
Aerospace Materials ◽  
Automated Manufacturing Systems ◽  
Construction Engineering

Present work shows many of Virtual Reality (RV) developments carried out in manufacturing processes field by the collaboration between Aerospace Materials and Production Department at the UPM University and Manufacturing and Construction Engineering at the UNED university. Most of them have been directed towards Numerical Control Machine Tools field and towards equipment that configure automated manufacturing systems like Flexible Manufacturing Systems (FMS).

scholarly journals AVANCES EN EL DESARROLLO DE UN SISTEMA DE MANUFACTURA ADITIVA BASADO EN STEP-NC

2018 ◽  
Vol 4 (1) ◽  
pp. 39-53 ◽  
Author(s):  
Efrain Rodriguez ◽  
Renan Bonnard ◽  
Alberto José Alvares
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Systems ◽  
Manufacturing System ◽  
Reference Model ◽  
Object Oriented Programming ◽  
Numerical Control ◽  
Layer By Layer ◽  
Machining Processes ◽  
Material Deposition ◽  
Nc Program

The new standard of numerical control, known as STEP-NC, is categorized as the future of the advanced manufacturing systems. Greater flexibility and interoperability are some potential benefits offered by STEP-NC to meet the challenges of the new industrial landscape that is envisaged with the advent of Industry 4.0. Meanwhile, STEP-NC object-oriented programming has been partially applied and developed for machining processes (milling, turning...). But with the processes of additive manufacturing has not happened the same and the development is still incipient. This work presents the advances in the development of a new STEP-NC compliant additive manufacturing system, focusing particularly on the development of the information model. The application model activities in the IDEF0 nomenclature and application reference model in EXPRESS are presented. The AM-layer-feature concept has been introduced to define the manufacturing feature of additive processes based on material deposition layer-by-layer. Finally, a STEP-NC program generated from the EXPRESS model is presented, which can be implemented on an additive manufacturing system to validate the proposed model.                                                                                           

Methods of Planning, Running and Optimization of Material Flow in the Laboratory of Flexible Manufacturing Systems with Robotized Manipulation Supported by No Drawing Production

2012 ◽  
Vol 220-223 ◽  
pp. 925-928
Author(s):  
Silvia Sebenova ◽  
Katarina Krajcova ◽  
Frantisek Pechacek
Keyword(s):  
Flexible Manufacturing ◽  
Material Flow ◽  
Flexible Manufacturing Systems ◽  
Manufacturing Systems ◽  
Production Costs ◽  
Just In Time ◽  
Selection Of

This paper is focused on the methods, which are used for planning, running and optimization of material flow. These methods are very important element of each production and company. There are several methods which are used, for example JIT (Just in Time), Kanban, TOC (Theorie of Constraints), etc. A selection of appropriate method affects largely production costs, efficiency and produced quantity. For the laboratory of flexible manufacturing systems with robotized manipulation supported by no drawing production were compared several methods and on the based their advantages, disadvantages and suitability of use was selected the most appropriate method of planning, running and optimization of material flow.

scholarly journals Robustness Optimization of FMS Under Production Plan Variations: Preliminary Results

1998 ◽  
Author(s):  
Kazuhiro Saitou ◽  
Helge Qvam
Keyword(s):  
Petri Nets ◽  
Petri Net ◽  
Flexible Manufacturing ◽  
Manufacturing Systems ◽  
Production Costs ◽  
Production Plan ◽  
Colored Petri Net ◽  
Multiple Production ◽  
Optimal Resource ◽  
Robustness Optimization

Abstract A method for robustness optimization of flexible manufacturing systems is presented which undergoes forecasted product plan variations. A configuration of an FMS is modeled by a colored Petri net and the associated transition firing sequence. The robustness optimization of the colored Petri net model is formulated as an multi-objective optimization problem which minimizes production costs under multiple production plans, and reconfiguration cost due to production plan changes. As a first attempt, machines with limited flexibility are considered, and a genetic algorithm, coupled with a simple FIFO dispatching rule, is used to simultaneously find an semi-optimal resource allocation and event-driven schedule of a colored Petri net. The resulting Petri nets are then compared with the Petri nets optimized for a particular production plan in order to address the effectiveness of the robustness optimization for simultaneous production of products with different similarities. The simulation results suggest that the robustness optimization should be considered when the products are moderately different in their manufacturing processes.

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