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Fundamentals of a recommendation system for the aluminum extrusion process based on data-driven modeling

Perzyk Marcin, Kochański Andrzej, Kozłowski Jacek

Computer Methods in Materials Science

2022

Vol. 22, No. 4

173--188

The aluminum profile extrusion process is briefly characterized in the paper, together with the presentation of historical, automatically recorded data. The initial selection of the important, widely understood, process parameters was made using statistical methods such as correlation analysis for continuous and categorical (discrete) variables and ‘inverse’ ANOVA and Kruskal–Wallis methods. These selected process variables were used as inputs for MLP-type neural models with two main product defects as the numerical outputs with values 0 and 1. A multi-variant development program was applied for the neural networks and the best neural models were utilized for finding the characteristic influence of the process parameters on the product quality. The final result of the research is the basis of a recommendation system for the significant process parameters that uses a combination of information from previous cases and neural models.

Projektowanie i wdrażanie procesów wytwarzania rur z powłoką Al-Si, przeznaczonych na elementy układów wydechowych

Nowak S., Knych T., Żaba K., Sierpiński Z., Starzykowski S.

Rudy i Metale Nieżelazne

2004

R. 49, nr 10-11

545-551

Przedstawiono wyniki niektórych badań, realizowanych w ramach przygotowania wdrożenia technologii wytwarzania stalowych rur zgrzewanych z powłoką Al-Si. Zidentyfikowano wymagania stawiane wyrobom przez użytkowników pojazdów samochodowych oraz przez producentów układów wydechowych. Przedstawiono wyniki identyfikacji wad wyrobów; wyniki badań wsadu i jednostkowych procesów pod kątem wyznaczenia optymalnego punktu pracy linii produkcyjnej. Analizowano również metodykę nadzorowania i techniki pomiarowe.

The paper deals with technological problems in production of welded steel tubes with Al-Si coating. In order to satisfy requirements of exhaust systems producers and users of the vehicles it is necessary to resolve those problems. The aim of the research was to collect data sufficient for designing the production process, that is to process the requirements into process parameters. The paper includes results of product defects identification, results of input material and unitary processes to determine an optimal work point of the production line. Supervision methods and measurement techniques have been analysed as well. Basic unitary processes have been examined: 1. slitting process - checking stability of strip width and slitting edge quality with special attention put to those factors which are connected with existence of the coating, 2. slit tube forming process - verification of shapes and positioning of tools forming a slit tube, which guarantee reshaping the slit into the tube in such a way that edges in the welding zone processing conditions verified as the so far existing steel - roller material frictional pair was replaced with Al-Si - roller material, 3. welding process - attempt to find relationship between the connector quality and adjustable process parameters was made. It was found out that non-contact measurement of temperature of a joint is required; quality of the joint was determined on the basis of microscope observations, and results of expanding, flattening and stretching tests of the ring. Further, tests of micro-hardness distribution and stretching tests on samples cut out of various places the tube perimeter were performed, 4. calibration process - deformation rates and deformation distribution at the perimeter, as well as relations between rollers speed and particular deformation rates were determine to achieve speed equality in feeding strips to the rollers and taking the strip by the rollers. A facility for removing the coat from the strip face and slit edge was designed, constructed and assembled into the welding line to solve the problem of coating remains. Conclusions present performance conditions - optimal parameters of unitary production processes.