Journals / Karamanoğlu Mehmetbey Üniversitesi Mühendislik ve Doğa Bilimleri Dergisi / 2026 / Cilt: 8 Sayı: 1

Analysis of Quality Defects in Centrifugal Casting Using Statistical Process Control Techniques

Savurma Döküm Yöntemiyle Üretilen Ürünlerde Çıkan Hataların İstatistiksel Proses Kontrol Teknikleri Kullanılarak İncelenmesi

Betül Sargınoğlu Ergun(KONYA TEKNİK ÜNİVERSİTESİ)0000-0002-9405-8478
Yakup Kara(KONYA TEKNİK ÜNİVERSİTESİ)0000-0001-8458-7328
Pages
22–28
Publication Date
2026-06-27
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The findings revealed that the hardness characteristics of the product constitute the most critical quality attribute influencing both product performance and customer satisfaction.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Improving quality in manufacturing depends on identifying the causes of defects, accurately analyzing them, and implementing process improvements based on the findings.
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Key Findings & Data:The findings revealed that the hardness characteristics of the product constitute the most critical quality attribute influencing both product performance and customer satisfaction.
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Conclusion & Impact:These improvements are expected to enhance process stability, reduce quality defects, and increase overall customer satisfaction.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Döküm · İstatistiksel Proses Kontrol · İyileştirme

Abstract

Improving quality in manufacturing depends on identifying the causes of defects, accurately analyzing them, and implementing process improvements based on the findings. The primary objective of this study is to identify quality-related defects in a company that manufactures mill roll cylinders using the centrifugal casting process, analyze these defects through Statistical Process Control (SPC) techniques, and develop improvement actions based on the analysis results. Since numerous process parameters influence quality in casting operations, the study focuses on determining the root causes of defects by examining these parameters. A product model was selected from a company supplying the milling machinery industry, taking into account the sector’s quality requirements and customer expectations. Various statistical methods, including data classification, cause-and-effect (Ishikawa) diagrams, control charts, and regression analyses, were employed to evaluate defect data and identify the factors affecting product quality. The findings revealed that the hardness characteristics of the product constitute the most critical quality attribute influencing both product performance and customer satisfaction. Consequently, the study proposes process improvement measures aimed at maintaining hardness values within the desired specification limits. These improvements are expected to enhance process stability, reduce quality defects, and increase overall customer satisfaction.

Özet

Üretimde kalite performansının artırılması, hatalara neden olan unsurların belirlenmesi, doğru bir şekilde analiz edilmesi ve elde edilen bulgular doğrultusunda süreçlerin iyileştirilmesine bağlıdır. Bu çalışmanın temel amacı, santrifüj döküm yöntemi kullanılarak değirmen vals silindiri üreten bir işletmede ortaya çıkan kalite hatalarını tespit etmek, bu hataları İstatistiksel Proses Kontrol (İPK) teknikleri ile analiz etmek ve analiz sonuçlarına dayalı iyileştirme faaliyetleri geliştirmektir. Döküm süreçlerinde kaliteyi etkileyen çok sayıda proses parametresi bulunduğundan, çalışmada bu parametreler incelenerek kalite hatalarının kök nedenleri belirlenmeye çalışılmıştır. Değirmen makineleri sektörüne tedarik sağlayan işletmede, sektörün kalite gereksinimleri ve müşteri beklentileri dikkate alınarak bir ürün modeli seçilmiş ve hata analizleri bu ürün üzerinden gerçekleştirilmiştir. Hata verilerinin değerlendirilmesinde gruplandırma analizleri, sebep-sonuç (Ishikawa) diyagramları, kontrol grafikleri ve regresyon analizleri gibi çeşitli istatistiksel yöntemlerden yararlanılmıştır. Araştırma bulguları, ürün sertlik özelliklerinin hem ürün performansını hem de müşteri memnuniyetini etkileyen en kritik kalite karakteristiği olduğunu ortaya koymuştur. Bu doğrultuda, sertlik değerlerinin hedeflenen spesifikasyon sınırları içerisinde tutulmasını sağlayacak proses iyileştirme önerileri geliştirilmiştir. Uygulanacak iyileştirmelerin proses kararlılığını artırması, kalite hatalarını azaltması ve müşteri memnuniyetini yükseltmesi beklenmektedir.

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Cite This Article

Ergun, B. S., Kara, Y. (2026). Analysis of Quality Defects in Centrifugal Casting Using Statistical Process Control Techniques. Karamanoğlu Mehmetbey Üniversitesi Mühendislik ve Doğa Bilimleri Dergisi, Cilt: 8 Sayı: 1, 22–28. https://doi.org/10.55213/kmujens.1937267

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