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KARE KAPLARIN DERİN ÇEKİLMESİNDE KALIP/BASKI PLAKASI AÇISININ LİMİT ÇEKME ORANI VE ET KALINLIĞI ÜZERİNDEKİ ETKİSİ

THE EFFECT OF DIE/BLANK HOLDER ANGLES ON LIMIT DRAWING RATIO AND WALL THİCKNESS IN DEEP DRAWING OF SQUARE CUPS

Journal Name:

  • Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

Publication Year:

  • 2012

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
This study presents an attempt to determine the effect of various angles of die/blank holder, radiuses of die/punch and die/blank holder force on drawing ratio and the wall thickness to form square cups in angular deep drawing dies using DIN EN10130-1999 sheet material. For this purpose, the die/blank holder profile with angles of α=0°, α=5°, α=10°, α=15° and die/punch profile with radiuses for R=4, R=6, R=8, mm. The punch has diameter of 50 mm and the die has a diameter of 47.6 mm, which gives 1.20 mm of clearance. Shell Tellus 68 oil was used between the die and the blank to reduce frictional resistance. The β value was enhanced from 1.86 (α=0) to 2.32 (α=15°) additionally, the Wall thickness values were measured as 0.637, 0.664, 0.733 and 0.742 mm for 0°,5°,10° and 15° angle α values, respectively. As a consequence, it was observed that the new type’s angular deep drawing dies gave better results with different angle and radiuses values than conventional dies with higher drawing ratio.
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Abstract (Original Language): 
Bu çalışma, kare kapların açılı derin çekme kalıplarında şekillendirilmesi için DIN EN10130-1999 çelik sac kullanılarak, kalıp/baskı plakası açısı (KBPA), baskı plakası kuvveti ve kalıp/zımba radyüs değişimlerinin limit çekme oranı (β) ve et kalınlığı üzerindeki etkisini belirlemek için yapılmıştır. Bunun için, kalıp/baskı plakasının yüzeylerine α=0°, α=5, α=10 ve α=15 lik açılar, kalıp/zımba uç kenarlarına da R=4, R=6 ve R=8 mm'lik radyüsler verilmiştir. Zımba çapı 50 mm, matris çapı 47.6 mm ve kalıp boşluğu 1.20 mm dir. Kalıp ve iş parçası arasındaki sürtünmeyi azaltmak için Shell Tellus 68 yağ kullanılmıştır. Çalışmada, KBPA α=0°’de β=1.86 iken, α=15° de β=2.32’ye kadar yükseltilmiş ve aynı zamanda et kalınlığı α=0° iken minimum kalınlık 0.637mm, α=5°, α=10° ve α=15° olması durumunda minimum et kalınlıkları sırasıyla 0.664, 0.733 ve 0.742 mm olarak elde edilmiş. Sonuç olarak, farklı açı ve yarıçaplarda kullanılan yeni tip kare çekme kalıplarının, geleneksel kalıplara nazaran daha yüksek çekme oranı (β) sağladığı tespit edilmiştir.
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  • Turkish

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