Дослідження та оптимізація дефектів лиття підставки прицільної планки АК47 при литті по моделям, що витоплюються

• Дата: 2023
• Автори: Тайє, Тішагер, Чінеке, Сімегн
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2023
• Теми: лиття по моделям; що витоплюються; програмне забезпечення ProCast; дефекти; підставка прицільної планки
• Онлайн доступ: https://plit-periodical.org.ua/index.php/plit/article/view/investigation-and-optimization-casting-defects-rear-sight-base-p
• Назва журналу: Casting Processes

Wollega University (Nekemte, Ethiopia) Investment casting (IC) process is a manufacturing method for many critical and value added components in many industrial and commercial applications. Today, all the precision components of medical, defense, automobile industries, and other industries are being manufactured using the IC process. IC may experience different defects such as crack, porosity, hot tear, shrinkage, blowhole etc., because of poor design of gating and riser system, and inappropriate selectionof process parameters. The casting of Rear sight base is a difficult operation due to its complex shape and thin wall structure. For such components with complex geometries, defects such as hot tearing, shrinkage porosity etc., are common and need to be addressed. Causes of defects have been investigated using interview, observation, group discussion, and Non-distractive testing (NDT) method. From the investigations, high percentage defect and influential parameters were selectedbased on the cause-effect diagram method. Optimization of process parameter such as getting length and pouring temperature were analyzed using ProCast software. The simulation contains the analysis of finite element method (FEM), simulation of fluid flow and solidification of metal execution of various pouring temperature and getting length for prediction of shrinkage porosity and hot tearing/ crack allocation/percentage. From the simulation result optimum pouring temperature and getting length have been selected. For the optimized getting length of 17 mm, 0% hot tear and 0.669 % shrinkage porosity defects were observed. The optimized pouring temperature was 1630 °C for the production of rear sight base components using investment casting. For the getting length of 17mm and optimized pouring temperature, shrinkage porosity was reduced by 40.93 % and hot tearing/crack was reduced by 9.4 %, compared to the former scheme (1580 °C pouring temperature, 15 mm gate length).   References 1. R. L. Wood (1960). Progress in investment casting. Metall. Rev., vol. 5, no. 1, pp. 119–135, doi: 10.1179/mtlr.1960.5.1.119.2. O. Of, P. Parameters, C. Through, and T. Method. (2018). “ET97 / 01 AK-47 REAR SIGHT BASE USING INVESTMENT CASTING THROUGH TAGUCHI METHOD ET97 / 01 AK-47 REAR SIGHT BASE USING INVESTMENT,” vol. 1, no. June, 2018.3. M. Di Foggia and D. M. D. Addona. (2013). Identification of critical key parameters and their impact to zero-defect manufacturing in the investment casting process, Procedia CIRP, vol. 12, pp. 264–269, doi: 10.1016/j.procir.2013.09.046.4. R. Chandrasekaran, R. D. S. G. Campilho, and F. J. G. Silva. (2019). Reduction of scrap percentage of cast parts by optimizing the process parameters. Procedia Manuf., vol. 38, pp. 1050–1057, doi: 10.1016/j.promfg.2020.01.191.5. No Title..6. M. Raza. (2015). PROCESS DEVELOPMENT FOR INVESTMENT CASTING OF THIN-WALLED COMPONENTS.7. R. T. Patil. (2015). Causes of Casting Defects with Remedies, vol. 4, no. 11, pp. 639–644..8. S. Shamasundar, D. Ramachandran, and N. S. Shrinivasan, “COMPUTER SIMULATION AND ANALYSIS OF”.9. P. G. Panchal, S. J. Joshi, and N. D. Ghetiya. (2015). Design and Analysis of Gating and Risering System for Casting of Ball Valves, Nirma Univeristy J. Eng. Technol., vol. 4, pp. 1–5.10. P. H. Huang and C. J. Lin. (2015). Computer-aided modeling and experimental verification of optimal gating system design for investment casting of precision rotor, Int. J. Adv. Manuf. Technol., vol. 79, no. 5–8, pp. 997–1006, doi: 10.1007/s00170-015-6897-5.11. P. H. Huang and W. J. Huang. (2018). Preventing shrinkage defects in investment casting of SUS310 stainless steel feather keys, IOP Conf. Ser. Earth Environ. Sci., vol. 186, no. 2, doi: 10.1088/1755-1315/186/2/012001.12. J. Fischer-bühner. (2007). Advances in the Prevention of Investment Casting Defects Assisted by Computer Simulation CESAL, Fischer-Buhner, no. May, pp. 149–172.13. V. Bijagare and V. Deulgaonkar. (2015). Modeling and Finite Element Analysis for a Casting Defect in Thin- Wall Modeling and Finite Element Analysis for a Casting Defect in Thin- Wall Structures, no. April.14. V. Bijagare and V. Deulgaonkar. (2015). Modeling and Finite Element Analysis for a Casting Defect in Thin- Wall Modeling and Finite Element Analysis for a Casting Defect in Thin- Wall Structures, no. April.15. A. Juriani. (2015). Casting Defects Analysis in Foundry and Their Remedial Measures with Industrial Case Studies, vol. 12, no. 6, pp. 43–53, doi: 10.9790/1684-12614354.16. C. Zhang, A. Boley, N. Faleev, D. J. Smith, and C. B. Honsberg. (2018). Investigation of Defect Creation in GaP / Si ( 001 ) Epitaxial Structures Investigation of defect creation in GaP / Si ( 0 0 1 ) epitaxial structures, J. Cryst. Growth, vol. 503, no. October, pp. 36–44, doi: 10.1016/j.jcrysgro.2018.09.020.