scholarly journals Conventional Lathe Remanufacturing into CNC Machine Tool: Uncertainty Modeling Approach

2020 ◽  
pp. 97-133
Author(s):  
Ziyad Tariq Abdullah
Keyword(s):  
Decision Making ◽  
Machine Tool ◽  
Uncertainty Modeling ◽  
Uncertainty Reduction ◽  
Advanced Technology ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Cnc Lathe ◽  
Optimum Solution

Aims: Uncertainty modeling to study possibility of proposing several remanufacturing alternatives of conventional lathe into CNC machine tool. Study Design: Conventional lathe into CNC machine remanufacturing-upgrading experience is used to project the suitable literature comparatively to construct uncertainty modeling. Faults modes of conventional lathe are studied to propose different remanufacturing solution based on faults literature viewpoints in field of lathe remanufacturing-upgrading, which are reviewed and modified to accommodate new changes that can accompany the current case study. Place and Duration of Study: Middle Technical University, Institute of Technology-Baghdad, Mechanical Techniques Department, between January 2020 and July 2020. Methodology: Decision making for selection of remanufactured alternatives and remanufacturing portfolio alternatives in field of lathe remanufacturing are reviewed. Experience in field of lathe remanufacturing is exploited to remodeling of existence models to optimize a remanufactured lathe into CNC machine as a case study. Methodology can be concluded into:- Literature survey to find two paths of: Faults and their statutes study. Remanufacturing portfolio study. Literature re-presentation and modeling. Literature results graphical modeling. Mathematical modeling of remanufacturability. Restoration alternative modeling Modeling of uncertainty. Results: Emerged technology aided conventional lathe into CNC lathe remanufacturing alternative exhibits good behavior of criteria toward optimization. While Advanced technology aided conventional lathe into CNC lathe remanufacturing alternative exhibits behavior to be of interesting ability to be a reservoir of developing potentials. Conventional technology aided conventional lathe remanufacturing alternative is of lower potentials to be developed into optimum solution. Conclusion: Remanufacturing-upgrading of conventional lathe into CNC machine in its mechanical part, it is merely traditional remanufacturing process of conventional lathe. Developing potentials can include that gearbox can be eliminated due to use of motorized axis, feed rod and lead screws, in both forward and transvers directions, can be replaced with motorized ball screws. Also tool post can be replaced with automatic tool changer while dovetail guide ways and saddles can be reused. Comparative literature based analysis and experience based analysis for uncertainty reduction can substitute the leak of relevant data acquisition for decision-making in field of remanufacturing. Uncertainty reduction modeling can enable simplify certain difficulties, the calculation of some criteria and adopting of simplified analysis methods so that theoretic and practical gap can be directed towards certain actual conditions to reach the optimum solution.

scholarly journals Sustainability Modeling Approach on Remanufacturing Conventional Lathe into CNC Machine Tool

2020 ◽  
pp. 1-30
Author(s):  
Ziyad Tariq Abdullah ◽  
Ekhlas Ahmad Abdulrazaq ◽  
Sara Saad Ghazi
Keyword(s):  
Machine Tool ◽  
Sustainability Assessment ◽  
Advanced Technology ◽  
Assessment Criteria ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Current Case ◽  
Cnc Lathe ◽  
Optimum Solution

Aims: Sustainability modeling to study possibility of proposing several remanufacturing alternatives of conventional lathe into CNC machine tool.   Study Design: Conventional machine tool into CNC machine remanufacturing-upgrading experience is mixed with literature based analysis to weight the criteria and the alternatives of assessment. Global weights are found to rank the alternatives. Suitable literature can be projected comparatively to construct sustainability model. Sustainability assessment models in field of lathe remanufacturing-upgrading are reviewed and modified to accommodate new changes that accompany the current case study. Place and Duration of Study: Middle Technical University, Institute of Technology-Baghdad, Mechanical Techniques Department, between 2019 and 2020. Methodology: 1- Literature survey to find out the most used sustainability assessment criteria. 2-Economic, environmental and social criteria specifying. 3-Normilizing weights of criteria. 4- Matching local weights of assessment criteria with fuzzy triangular numbers to find out the whole weights. 5-Senairo based analysis application to find out alternatives of remanufacturing. 6-Weighting alternatives, criteria and sub-criteria. 7- Find global weights and rank the alternatives. Decision making for selection of remanufactured alternatives and remanufacturing alternatives can include :(1) Spindle , gearbox and dovetail guide ways reuse scenario. (2) Spindle remanufacturing scenario. (3) Gearbox remanufacturing scenario. (4) Dovetail guide ways remanufacturing scenario.(5) Spindle and gearbox remanufacturing scenario. (6) Spindle and dovetail guide ways remanufacturing scenario. (7) Spindle, gearbox and dovetail guide ways remanufacturing scenario. Alternatives in field of machine tools remanufacturing are reviewed. Experience in field of machine tool remanufacturing is exploited to remodeling the existence models to optimize a remanufactured lathe into CNC machine case study. Results: Emerging technology aided Conventional-CNC lathe remanufacturing-upgrading alternative exhibits good behavior of criteria toward optimization. While advanced technology aided Conventional-CNC lathe remanufacturing exhibits behavior to be of interesting developing potentials. Conventional-Conventional lathe remanufacturing is of lower potentials to be developed into optimum solution. Conclusion: Remanufacturing-upgrading of conventional lathe into CNC machine in its mechanical part, it is merely traditional remanufacturing process of conventional lathe where gearbox can be eliminated due to use of motorized axis. Feed rod and lead screws, in both forward and transvers directions, can be replaced with motorized ball screws. Also tool post can be replaced with automatic tool changer while saddle can be reused. The most promising technological key is the use of mate/insert/screw to assembly ball guide ways to disable dovetail guide ways and highlight structural specifications of CNC lathe. Thus precision, accuracy, repeatability and reliability will be enhanced considerably. Comparative literature based analysis and experience based analysis with uncertainty reduction can substitute the leak of relevant data acquisition for remanufacturing-upgrading modeling. Which enables simplify certain difficulties and the calculations of some criteria and adopts simplified methods so that theoretic and practical gap can be directed towards certain actual conditions to reach the optimum solution.

scholarly journals Decision-making Tool for Moving from 3-axes to 5-axes CNC Machine-tool

2016 ◽  
Vol 91 ◽  
pp. 184-192 ◽  
Author(s):  
Octavian Bologa ◽  
Radu-Eugen Breaz ◽  
Sever-Gabriel Racz ◽  
Mihai Crenganiş
Keyword(s):  
Decision Making ◽  
Machine Tool ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Decision Making Tool

An Implementation of Intelligent CNC Machine Tools

2010 ◽  
Vol 44-47 ◽  
pp. 557-561 ◽  
Author(s):  
Chen Sheng Wang ◽  
Tjamme Wiegers ◽  
Joris S.M. Vergeest
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Tool Design ◽  
Cnc Machine Tools ◽  
Preliminary Evaluation ◽  
Machining Efficiency ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Machine Tool Design ◽  
Cnc Lathe

Improving the machining efficiency of CNC machine tools by introducing intelligence is now gaining more attention from both researchers and entrepreneurs. Based on the assessment of existing strategy of intelligent machine tool design, an implementation and preliminary evaluation of an intelligent CNC lathe has been reported in this paper. Techniques discussed in this paper are expected to benefit CNC machine tool researchers and designers in terms of the development of intelligent CNC machine tools.

Research on the Influence of Shields to Thermal Equilibrium of CNC Machine Tool

2009 ◽  
Vol 626-627 ◽  
pp. 441-446
Author(s):  
Yang Liu ◽  
Ying Lu ◽  
Xue Feng Bi ◽  
Guang Qi Cai
Keyword(s):  
Machine Tool ◽  
Thermal Equilibrium ◽  
Thermal Characteristics ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Ansys Software ◽  
Element Analysis ◽  
Temperature Distributions ◽  
Cnc Lathe ◽  
Thermal Sources

In order to investigate that shields have the effect on the thermal equilibrium of CNC machine tool, this paper applies the theory of heat transfer and finite element analysis to analyze the thermal characteristics of CNC lathe CK40A/1000. By ANSYS software, the temperature distributions of spindle engine, headstock and bearing at thermal equilibrium with/without shields are obtained. By analyzing thermal equilibrium patterns and experiments, the temperature of spindle bearings with shields are 3-4 higher than without shields at thermal equilibrium. And shields have less influence on the temperature gradient of tool inner thermal sources.

Ontology-Based Fault Diagnosis Knowledge Representation of CNC Machine Tool

2013 ◽  
Vol 427-429 ◽  
pp. 1372-1375 ◽  
Author(s):  
Bin Shen ◽  
Shu Yu Zhao ◽  
Jia Hai Wang
Keyword(s):  
Fault Diagnosis ◽  
Knowledge Representation ◽  
Machine Tool ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Cnc Lathe

In order to improve the knowledge representation in the field of CNC machine tool fault diagnosis, a method of knowledge representation based on ontology was proposed. Firstly, the fault diagnosis process in this field were described and analyzed. Secondly, the definitions of ontology such as classes, attributes, relations, and functions were provided, in order to describe the process of knowledge representation based on ontology. At last, the model with OWL of fault diagnosis of CNC lathe was constructed with the protégé. It shows that the method proposed in this article to can improve the description of the CNC machine tool fault diagnosis.

Selecting a CNC Machine Tool Using the Intuitionistic Fuzzy TOPSIS Approach for FMC

2013 ◽  
Vol 315 ◽  
pp. 196-205 ◽  
Author(s):  
Nguyen Huu Tho ◽  
Siti Zawiah Md Dawal ◽  
Nukman Yusoff ◽  
Farzad Tahriri ◽  
Hideki Aoyama
Keyword(s):  
Decision Making ◽  
Machine Tool ◽  
Fuzzy Topsis ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Tool Selection ◽  
Machine Tool Selection ◽  
Intuitionistic Fuzzy ◽  
Topsis Approach ◽  
Intuitionistic Fuzzy Topsis

Decision making for machine tool selection is intractable work of managers due to the factors involving the vague and imprecise information. The degree of hesitation is considered in the experts judgment. In this paper, an integration of the intuitionistic fuzzy (IF) Entropy and TOPSIS method are utilized to solve the vague information for decision-making process in machine tool selection. In particular, the weights of criteria are calculated by the IF Entropy and the TOPSIS is employed to determine the priority of alternative. The results of the numerical example show this integration is practical and easy to use for engineers and managers in the companies.

Benchmarking CNC Machine Tool Using Hybrid-Fuzzy Methodology

2015 ◽  
Vol 4 (2) ◽  
pp. 28-46 ◽  
Author(s):  
Anoop Kumar Sahu ◽  
Nitin Kumar Sahu ◽  
Atul Kumar Sahu
Keyword(s):  
Decision Making ◽  
Machine Tool ◽  
Global Market ◽  
Numerical Control ◽  
Cnc Machine Tools ◽  
Ideal Solution ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Order Preference ◽  
Topsis Technique

In today's era, managerial decision making has become a very momentous component due to the leverage of attention on achieving organizational goal i.e. enhancing effective utilization of input assets, satisfying customers' demand and minimizing loss (maximize profit). The evaluation of the most appropriate Computer Numerical Control (CNC) machine tool has become one of the key factors for sustaining the organization/manufacturing sectors/production units at competitive global market place. Productivity, precision and accuracy etc. are the most important issues behind adaptation/exploration of CNC machine tools. So, in such a cases, subjective indices are considered beside the objective indices and complexity of the CNC machine tool evaluation decision problems is solved via subjective assessments (judgment) of expert panel, also called the decision-making group. In this reporting, TOPSIS (technique for order preference by similarity to ideal solution) based Multi-Criteria Decision Making (MCDM) approach has fruitfully applied to emphasize the decision making scenario at the subjective information evaluation index (indices) platform. So, TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) analytical methodology conjunction with Trapezoidal Fuzzy Number (TFN) has been explored for assessing and benchmarking the most preferable CNC machine tool from a group of preferred options/alternatives. Finally, an empirical case study has been carried out check the feasibility, efficiency and validity of proposed methodology and the benchmarking of preferred alternative machine tool has been derived in accordance with descending value of the ‘collective index'. Higher value of ‘collective index' reflects higher degree of performance extent.

scholarly journals Case study of virtual reality in CNC machine tool exhibition

2017 ◽  
Vol 123 ◽  
pp. 00004 ◽  
Author(s):  
Yung-Chou Kao ◽  
Chung-Shuo Lee ◽  
Zhi-Ren Liu ◽  
Yu-Fu Lin
Keyword(s):  
Virtual Reality ◽  
Machine Tool ◽  
Cnc Machine Tool ◽  
Cnc Machine
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