INTELLIGENT USE OF ISO AND AGMA GEAR STANDARDS FOR COST EFFECTIVE SPUR GEAR DESIGN

Abstract

ISO and AGMA standards provide the most accurate and commonly used spur gear design approaches but the design results obtained from both are differing from each other even under the same input parameters. The selected design approach has a significant influence on the results, therefore, if the design approaches are not rated for gear designs, the designers are not aware of the loss or gain on the cost and failure or success of the design. This paper uses ISO and AGMA gear standards to carry out spur gear designs considering the allowable range of gear speed ratios, transmitted power combinations and the failure conditions like bending and surface contact fatigue. These wide ranges of considerations which cover almost the most design applications in industrial practice allow to rate the design results obtained from both standards. The systematic method available in this study is generic and meets a need to select an appropriate gear standard by introducing dimensionless, “Geometric Rating Numbers, (GR_i)”. The practical curves and charts help designers to select cost effective, interference-free spur gear design approach for a particular gear design.

Keywords

• Gear design,Gear standards,Gear rating,Dimensionless number,Cost effective design

MALİYET ETKİN DÜZ DİŞLI ÇARK TASARIMI GERÇEKLEŞTİRMEK İÇİN ISO VE AGMA STANDARTLARINDAN UYGUN OLANININ KULLANIMI

Abstract

ISO ve AGMA standartları dişli çark tasarımında en yaygın olarak kullanılan ve doğru sonuçlar veren tasarım yaklaşımlarıdır. Ama aynı çalışma parametreleri altında dahi elde edilen tasarım sonuçları birbirlerinden farklılık göstermektedir. Tasarım için seçilen yaklaşım sonuçlar üzerinde önemli etkiye sahiptir. Bu sebeple, eğer tasarım yaklaşımları birbirlerine göre kıyaslanmaz ise tasarımcılar üzerinde maliyetten kazanç veya kayıp hakkında veya tasarımın başarılı veya başarısız olması ihtimali hakkında farkındalık oluşmayacaktır. Bu çalışma, ISO ve AGMA standartlarını kullanarak düz dişli çark tasarımları gerçekleştirir. Tasarımlarda dişli hız oranları, aktarılan güç değerleri, ve yüzey temas ve eğilme gerilmeleri gibi dişli çarklar yorulma gerilmeleri de dikkate alınmıştır. Bu geniş yelpazede değerlendirilen faktörler sayesinde elde edilen sonuçlar hemen hemen birçok endüstriyel alanda ihtiyaç duyulan uygulamaları kapsayacak niteliktedir. Çalışmada sunulan sistematik metot kendine özgü olup uygun tasarım yaklaşımı seçmeyi sağlar. Bunu "Geometric Rating Number (GRi)" adı verilen boyutsuz sayılar türeterek yapmaktadır. Elde edilen pratik eğriler ve grafikler tasarımcıya maliyet etkin, doğru tasarımı ortaya koyma noktasında yol gösterici niteliktedir.

Keywords

• dişli çark tasarımı,dişli çark standartları,dişli çarkların göreceli kıyaslanması,boyutsuz sayılar,maliyet etkin tasarım

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