Emprenye işleminin ağaç malzemede vida tutma direncine etkisi
The effect of impregnation process on screwing withdrawal strength in wood material
Yazar: İBRAHİM AÇIKEL
Danışman: DOÇ. DR. MUSA ATAR
Gazi Üniversitesi / Fen Bilimleri Enstitüsü / İleri Teknolojiler Ana Bilim Dalı
Derece: Yüksek Lisans, 2007
Konu: Ağaç İşleri = Wood Products

Özet:
Bu çalısma, emprenye isleminin agaç malzemede vida çekme direncine etkisinibelirlemek amacıyla yayılmıstır. Bu amaçla mobilya endüstrisinde en çokkullanılan igne yapraklı agaçlardan, Sarıçam (Pinus sylvestris Lipsky); yapraklıagaçlardan, Sapsız mese (Quercus petreae Lipsky) ve Dogu kayını (FagusorientalisLipsky) kullanılmıstır. Agaç malzemeler boraks, borik asit,boraks+borik asit, imersol-aqua ve timbercare-aqua emprenye maddeleri ileASTM-D 1413, TS 344 ve TS 345'de belirlenen kosullarda emprenyeedilmislerdir. Emprenye edilmis örnekler iki farklı çapta (3,5x50 mm ve 4x50mm) vida ile TS EN 13446'ya göre vida çekme deneyine tabi tutulmuslardır.Sonuç olarak, vida çekme direnci agaç türü bakımından en yüksek mesede(41,41 N/mm2), en düsük sarıçamda (27,81 N/mm2); empenye maddeleribakımından en yüksek Ba'de (36,80 N/mm2), en düsük Iau'de (35,52 N/mm2);vida çapı bakımından en yüksek V1'de (37,21 N/mm2), en düsük V2'de (34,99N/mm2) ve vidalama yönü bakımından en yüksek yüzeyde (42,01 N/mm2), endüsük maktada (31,77 N/mm2) elde edilmistir.Agaç türü, emprenye maddeleri, vida çapı ve baglantı yönü etkilesimine göre enyüksek M+Bx+V1+Yü'de (57,14 N/mm2), en düsük Ç+Iau+V1+Ma'da (22,56N/mm2) olarak bulunmustur.Buna göre emprenye islemi vida çekme direncini arttırmıstır. UygulamalardaBx ile emprenye edilmis, V1 ile yüzeyden baglanmıs parçaların yüksek dayanımgösterecegi söylenebilir.

Abstract:
In this study, the effect of impregnation process on screw withdrawal strengthin wood materials was researched. In this regard, the woods that are mostcommonly used in furniture industry were used, such as; scotch pine (Pinussylvestris Lipsky); oak (Quercus petreae Lipsky); and oriental beech (Fagusorientalis Lipsky). The wood materials were impregnated with borax, boric acid,borax+boric acid, imersol-aqua and timbercare-aqua in accordance with theconditions mentioned in ASTM-D 1413, TS 344 and TS 345. The impregnatedsamples were subjected to screw withdrawal strength tests at two differentdiameters (3,5x50 mm and 4x50 mm) in accordance with TS EN 13446.At the end of the tests, it was observed that the highest withdrawal strength wasobtained in oak (41,41 N/mm2), and the lowest withdrawal strength wasobtained in scotch pine (27,81 N/mm2); according to impregnated materials, thehighest withdrawing strength was obtained in Ba (36,80 N/mm2); the lowestwithdrawing strength was obtained in Iau (35,52 N/mm2). With respect to thescrew diameter, the highest withdrawing strength was obtained in VI (37,21N/mm2), and the lowest withdrawing strength was obtained in V2 (34,99N/mm2). With respect to the screwing direction, the highest withdrawingstrength was obtained at the surface (42,01 N/mm2), and the lowest withdrawingstrength was obtained at the cross section (31,77 N/mm2).In accordance with the interaction of the factors such as the wood type,impregnated materials, screw diameter and the connection direction, the highestwithdrawing strength was found at M+Bx+V1+Yu (57,14 N/mm2), and thelowest withdrawing strength was found at C+Iau+V1+Ma (22,56 N/mm2).In this regard, it was seen that the impregnation process increased the screwwithdrawal strength. It can be said that, in the applications, the pieces that areimpregnated with Bx and connected with V1 at the surface shall display thehighest strength.