A Novel Modular Disassembly Design Method for CNC Machine Tools based on PSOA and TOPSIS

2020 ◽  
Author(s):  
Yi-Xiong Feng ◽  
Xuan-Yu Wu ◽  
Xing Zhai ◽  
Hao Zheng ◽  
Shan-He Lou ◽  
...  
Keyword(s):  
Machine Tools ◽  
Modular Design ◽  
Rough Set Theory ◽  
Design Method ◽  
Indicator System ◽  
Environmental Benefits ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Entropy Weight ◽  
Analytic Hierarchy

Abstract Disassembly is one of the crucial issues for the green remanufacturing of obsolete CNC machine tools. Meanwhile, modular design method is the guarantee of disassembly rationality, which can maximize economic and environmental benefits. However, modular disassembly processes of CNC machine tools are more uncertainty in system structures and component conditions. On the basis of summarizing the existing research, disassembly module modeling of CNC machine tools is implemented. For one advantage, the rough set theory is utilized to cluster the parts into different disassembly modules. For another, disassembly information model is constructed by the disassembly multi-constrained graph. Secondly, multi-objective mathematical model which contains disassembly time, disassembly benefit and disassembly complexity is built. A novel particle swarm optimization algorithm (PSOA) improved by niche technology is applied to the disassembly sequence planning. Last but not least, this work also evaluates the disassembly scheme of CNC machine tools based on the technology for order preference by similarity to an ideal solution (TOPSIS). Evaluation indicator system is established and the comprehensive weight of evaluation indicators is determined by the respective advantages of entropy weight method (EWM) and analytic hierarchy process (AHP). A case study is conducted to illustrate the feasibility of the proposed models and methods. The results of this work can contribute to the selection of the optimal modular disassembly scheme of CNC machine tools.

Study on Modular Design Method for CNC Lathe

2011 ◽  
Vol 80-81 ◽  
pp. 1198-1202
Author(s):  
Zhi Wei Xu ◽  
Yong Xian Liu
Keyword(s):  
Machine Tools ◽  
Modular Design ◽  
Design Method ◽  
Functional Module ◽  
Physical Structure ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Cnc Lathe ◽  
Whole Life Cycle ◽  
Module Partition

A multi-dimensional module partition methodology is put forward for CNC lathe, in which not only the functional module partition and the physical structure module partition of CNC machine tools are taken into account, but the characteristics of different stages of in the whole life-cycle of machine tools is considered as well. On the basis of this the principle of module partition for CNC machine tools are presented. The mechanical structure system of CNC lathe is elaborated on the functional module and structural module. A CNC machine tool company’s HTC Series CNC lathes modular design is illustrated as an example.

Health status evaluation method of CNC machine tools based on grey clustering analysis and fuzzy comprehensive evaluation

2021 ◽  
pp. 1-18
Author(s):  
Xiaoqing Huang ◽  
Zhilong Wang ◽  
Shihao Liu
Keyword(s):  
Health Status ◽  
Clustering Analysis ◽  
Machine Tools ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Indicator System ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Grey Clustering

In order to solve the problem of health evaluation of CNC machine tools, an evaluation method based on grey clustering analysis and fuzzy comprehensive evaluation was proposed. The health status grade of in-service CNC machine tools was divided, and the performance indicator system of CNC machine tools was constructed. On the above basis, the relative importance of each performance and its indicators were combined, and grey clustering analysis and fuzzy comprehensive evaluation was utilized to evaluate the health status of in-service CNC machine tools to determine their health grade. The proposed health status evaluation method was applied to evaluate the health level of an in-service gantry CNC machine that can be used for the machining propellers, and the results shown that the health status of the whole gantry CNC machine tool is healthy. The proposed evaluation method provides useful references for further in-depth research on the health status analysis and optimization of CNC machine tools.

Application of Tree Graph Method for Reducing the Total Time of Tool Changing in Milling and Boring Machine Tools

2013 ◽  
Vol 371 ◽  
pp. 431-435 ◽  
Author(s):  
Claudiu Obreja ◽  
Gheorghe Stan ◽  
Lucian Adrian Mihaila ◽  
Marius Pascu
Keyword(s):  
Machine Tools ◽  
Design Method ◽  
Machining Process ◽  
Cnc Machine Tools ◽  
Tree Graph ◽  
Cnc Machine ◽  
High Productivity ◽  
Automatic Tool Changer ◽  
Automatic Tool ◽  
Set Up

With a view of increasing the productivity on CNC machine tools one of the main solution is to reduce, as much as possible, the auxiliary time consumed with the set-up and replacement of the tools and work pieces engaged in the machining process. Reducing the total time of the tool changing process by the automatic tool changer system can be also achieved through minimizing the number of movements needed for the actual exchange of the tool, from the tool magazine to the machine spindle (the optimization of the tool changing sequences). This paper presents a new design method based on the tree-graph theory. We consider an existing automatic tool changing system, mounted on the milling and boring machining centre, and by applying the new method we obtain all the possible configurations to minimize the tool changing sequence of the automatic tool changer system. By making use of the method proposed we obtain the tool changing sequences with minimum necessary movements needed to exchange the tool. Reconfiguring an existing machine tool provided with an automatic tool changer system by making use of the proposed method leads to obtaining the smallest changing time and thus high productivity.

scholarly journals Evaluating Safety Systems for Machine Tools with Computer Numerical Control using Analytic Hierarchy Process

Safety ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 14 ◽  
Author(s):  
Sever-Gabriel Racz ◽  
Radu-Eugen Breaz ◽  
Lucian-Ionel Cioca
Keyword(s):  
Analytic Hierarchy Process ◽  
Machine Tools ◽  
Computer Numerical Control ◽  
Numerical Control ◽  
Machining Process ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Analytic Hierarchy ◽  
Safety Systems ◽  
Hierarchy Process

Computer numerical control (CNC) machine tools are complex production systems with fully automatic machine parts. Nowadays, high feed rates and machining speeds are used during the machining process. Human operators are still needed to set-up the machine, load/unload workpieces and parts, load the machining code, and supervise the machining process. The operators work in an environment where automated high-speed motions occur, and consequently, CNC machine tools have to be equipped with safety systems. The approach presented in this paper was to evaluate the main safety systems of CNC machine tools based upon the analytic hierarchy process (AHP). The analyzed systems were divided into six main categories and compared pairwise using five criteria proposed by the authors. The approach and the obtained results significantly relied upon the situation found at the industrial company used as a benchmark for the research. The analysis reveals that, among considered safety devices, manually operated controls are the most efficient ones. Finally, a sensitivity analysis was conducted to test the stability of the AHP solution.

Lifecycle-oriented product modular design of CNC machine tools

2015 ◽  
Vol 231 (11) ◽  
pp. 1981-1994
Author(s):  
Zhongqi Sheng ◽  
Yuebin Li ◽  
Like Wu ◽  
Hualong Xie
Keyword(s):  
Machine Tools ◽  
Process Model ◽  
Modular Design ◽  
Service System ◽  
Market Competition ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Product Service System ◽  
Product Service ◽  
Design Process Model

Product service system is one new production paradigm for manufacturing enterprises to cope with fierce market competition in service economy environment. Product modularization is an important part of product service system development. In this paper, the design process model of product service system is built on the basis of current product service system modeling methods. Guided by lifecycle-oriented modular design idea, the product function is decomposed and the function units are obtained, which correspond to specific parts in the product. Using fuzzy C-means clustering algorithm based on simulated annealing and genetic algorithm for clustering analysis, the division scheme of product modules is got. Lifecycle-oriented product modular design method pays more attention to environmental attributes of the product, and considers the consciousness of environmental protection and sustainability in product design well. Using CNC machine tools as an example, this paper verifies the reliability, rationality and superiority of presented product module division method oriented on CNC machine tools.

Application of Genetic Algorithm in the Study of Semantic Modeling Design of CNC Machine Tools

2012 ◽  
Vol 472-475 ◽  
pp. 2235-2240 ◽  
Author(s):  
Tu Lan ◽  
Sheng Ju Tang ◽  
Bo Chen ◽  
De Ke Guo
Keyword(s):  
Genetic Algorithm ◽  
Machine Tools ◽  
Intelligent Design ◽  
Optimization Problems ◽  
Design Method ◽  
Fitness Function ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Optimal Design Method ◽  
Shape Characteristics

Because of the outstanding advantages of genetic algorithms in solving optimization problems of engineering design, in this paper, using genetic algorithm combined with Kansei Engineering as a optimal design method for product’s semantics modeling design, and using real-coded way to characterize shape characteristics of CNC machine tools, comprehensive accounted of user’s semantic needs and color Mido, then, established the fitness function, combined with the key components to complete the design. By case analysis shows that the method is feasible, and lays a foundation for intelligent design of CNC machine tools.

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