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Fatigue properties of spring reinforces polymer gears

Yay takviyeli plastik di·şlilerin yorulma özellikleri
Authors: Can, Hilal; Mendi, F; Topçu, Muzaffer;

Fatigue properties of spring reinforces polymer gears

Abstract

Failure of gears, occur surface pressure stress and fracture at base of teeth. For steel gears, it is known that process of carburizing increases fatigue strength. Internal stress on the surface increases of fracture fatigue strength. In this study fatigue properties of polypropylene gear reinforced with 1.2 mm wire diameter metallic springs was investigated. Extension springs were used as reinforcement element and placed into the mould and stretched before injection of polypropylene material into the mould. After injection of polypropylene, stretched springs were loosened in order to obtain pre-stressing. Fatigue tests were performed on the produced gear. Reinforcement increased the strength of gears. At result of experiments, pre-stressing increase in service life 12 times more than that of specimens without reinforcement.

Dişlilerde hasar, diş dibinden kırılma ve yüzey basıncı ile oluşmaktadır. Çelik dişlilerde, karbürleme işlemi ile dişlilerin yorulma dayanımları artmaktadır. Kırılma yorulma dayanımının artışında, yüzeyde oluşan bası iç gerilmelerinin büyük etkisi vardır. Bu çalışmada, içine 1.2 mm tel çapına sahip yaylar yerleştirilmiş polipropilenden üretilmiş dişli çarkların özellikleri incelenmiştir. Yaylar, enjeksiyon kalıplama öncesi çekilip; kalıplama sonrası bırakılarak öngerilme oluşturulmuştur. Yorulma deneyleri gerçekleştirilmiş ve takviye yapılmasının dayanımı artırdığı görülmüştür. Deneyler sonucunda öngerilmenin, plastik dişlinin yorulma ömrünü takviyesiz numuneye göre 12 kata kadar artırdığı bulunmuştur.

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Turkey
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Keywords

Plastik dişliler;Yay takviyesi;Yorulma dayanımı;Öngerilme, Polymer gears; Reinforcement; Fatigue; Pre-stressing, Polymer gears, Polymer gears;Reinforcement;Fatigue;Pre-stressing, Pre-stressing, Fatigue, Reinforcement, 620

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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