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Machinability investigation during turning of polyoxymethylene POM-C and optimization of cutting parameters using Pareto analysis, linear regression and genetic algorithm

Hakmi Tallal, Hamdi Amine, Touggui Youssef, Laouissi Aissa, Belhadi Salim, Yallese Mohamed A.

Archive of Mechanical Engineering

2024

LXXI, nr 1

47--71

This paper presents a study on the dry turning of polyoxymethylene copolymer POM-C. The effect of five factors (cutting speed, feed rate, depth of cut, nose radius, and main cutting edge angle) on machinability is evaluated using four output parameters: surface roughness, tangential force, cutting power, and material removal rate. To do so, the study relies on three approaches: (i) Pareto statistical analysis, (ii) multiple linear regression modeling, and (iii) optimization using the genetic algorithm. To conduct the investigation, mathematical models are developed using response surface methodology based on the Taguchi 𝐿16 orthogonal array. The results indicate that feed rate, nose radius, and cutting edge angle significantly influence surface quality, while depth of cut, feed, and speed have a notable impact on other machinability parameters. The developed mathematical models have determination coefficients greater than or very close to 95%, making them very useful for the industry as they allow predicting response values based on the chosen cutting parameters. Finally, the optimization using the genetic algorithm proves to be promising and effective in determining the optimal cutting parameters to maximize productivity while improving surface quality.

Investigation of Shrinkage Defect in Castings by Quantitative Ishikawa Diagram

Chokkalingam B., Raja V., Anburaj J., Immanual R., Dhineshkumar M.

Archives of Foundry Engineering

2017

Vol. 17, iss. 1

174--178

Metal casting process involves processes such as pattern making, moulding and melting etc. Casting defects occur due to combination of various processes even though efforts are taken to control them. The first step in the defect analysis is to identify the major casting defect among the many casting defects. Then the analysis is to be made to find the root cause of the particular defect. Moreover it is especially difficult to identify the root causes of the defect. Therefore, a systematic method is required to identify the root cause of the defect among possible causes, consequently specific remedial measures have to be implemented to control them. This paper presents a systematic procedure to identify the root cause of shrinkage defect in an automobile body casting (SG 500/7) and control it by the application of Pareto chart and Ishikawa diagram. with quantitative Weightage. It was found that the root causes were larger volume section in the cope, insufficient feeding of riser and insufficient poured metal in the riser. The necessary remedial measures were taken and castings were reproduced. The shrinkage defect in the castings was completely eliminated.

Arkusz kalkulacyjny Excel w nauczaniu statystycznej kontroli jakości procesu produkcji

Kuna-Broniowska I.

Inżynieria Rolnicza

2005

R. 9, nr 8

203--210

Rozważano możliwość wykorzystania narzędzi programu Excel w statystycznej kontroli jakości procesu produkcji oraz w nauczaniu tej metody kontroli jakości. Analizę możliwości programu przeprowadzono zarówno pod kątem wykorzystania jego standardowych funkcji, jak też opracowania makr, szablonów arkuszy dla danych pomiarowych oraz instrukcji.

Paper considered the possibilities of applying the Excel programme to statistical control of production process quality as well as in teaching of this quality control method. The programme was analyzed in respect of its standard functions as well as of the macros’ elaboration, data collection sheet patterns and instructions.