ÖNDER TOR, Samet DEMİREL, Lingling HU, Jilei ZHANG

Effects of Driving Torques on Direct Screw Withdrawal Resistance in

Bu çalışmada vidalama torklarının vida çekme direnci üzerindeki etkileri araştırılmıştır. Bu amaçla, dikey yönde vida çekme direnci testinde kullanılacak test numuneleri kılavuz deliğinin çapına (1.6, 2, 2.4 mm), vida çekme yönüne (kenar, son, ve yüzey) ve torklama seviyelerine göre hazırlanmıştır. Deney sonuçlarına göre, yüzey yönünde dikey çekme direnci diğer iki yöne göre daha yüksek dirence sahiptir. Vidalama tork seviyleri kıyaslandığında ise, vidanın boşta döndüğü torklama seviyelerinde, çekme direnci diğer seviyelere nazaran daha düşük seviyede olduğu bulunmuştur. Bu yüzden, vidalama yaparken özellikle kılavuz delik çalpları, vida çekme yönüne ve vidalama torkları seviyelerine göre dikkatli bir şekilde seçilmelidir

OSBYönlendirilmiş Yonga Levhalarda Vidalama Torklarının Vida Çekme Direnci üzerine Etkisi

This study was performed to evaluate effects of driving torques on direct screw withdrawal resistance (DSWR) in OSB. Pilot hole diameters (1.6, 2, 2.4 mm), embedded screw orientations (edge-, end- and face-) and torque levels, that were obtained from the two main driving torques of seating and stripping, were selected to test on DSWR. The results of the study showed that the pilot hole diameters were needed to be chosen carefully related to the grain orientation and torque level. The DSWR in face orientation was higher than the ones in edge and end orientations. Based on the torque levels selected, the DSWR was lower at the torque level closer to the stripping torque levels in OSB

PDF

___

ASTM 2010a D-1761-06. Standard test method for mechanical fasteners in wood, American Society for Testing and Materials, West Conshohocken, PA.
ASTM 2010b D 1037-06. Standard test methods for evaluating properties of wood-base fiber and particle panel materials, American Society for Testing and materials, West Conshohocken, PA.
ASTM 2010c D 4442-92. Standard test methods for direct moisture content measurement of wood and wood-base materials. American Society for Testing and materials, West Conshohocken, PA.
Carroll, M.N., 1970. Relationship between driving torque and screw-holding strength in particleboard and plywood. Forest Prod J 20(3): 24-29.
Carter, D.R., Shimaoka, E.E., Harris, W.H., et al., 1984. Changes in long-bone structural properties during the first 8 weeks of plate implantation. Journal of Orthopaedic Research 2 (1), 80-89.
Didriksson, E.I.E., Nyren, J.O., Back, E.L., 1974. The splitting of wood-base building boards due to edge screwing. Forest Prod J 24(7):35-39.
Eckelman, C.A, 1990. Fasteners and their use in particleboard and medium density fiberboard. National University. Association. Purdue
Eckelman, C.A., 1973. Holding strength of screws in wood and wood-base materials. Res. Rept. No. 895. Agric. Expt. Sta. Purdue University, West Lafayette, Ind. pp:15. Eckelman, C.A., 1975. Screw-holding performance in hardwoods and particleboard. Forest Products Jornal 25(6):30-35.
Eckelman, C.A., 1990. Fasteners and their use in particleboard and medium density fiberboard. National University. Association. Purdue Fujimoto, Y. of Joints for Performance Particleboard. Science Bulletin of the Faculty of Agriculture, Kyushu University, Japan 30(1): 45-47.
Jacobs, R., Rahn, B., Perren, S., 1981. Effect of plates on cortical bone perfusion. The Journal of Trauma 21 (2), 91-95.
Lawson, K.J., Brems, J., 2001. Effect of insertion torque on bone screw pullout strength. Orthopedics 24(5):451-454.
National Particleboard Association, 1968. Screw holding of particleboard. Tech. Bull. No. 3, Washington, D.C.
Rajak. Z., Eckelman, C.A., 1993. Edge and face withdrawal strength of large screws in particleboard and medium density fiberboard. Forest Prod J 43(4):25-30.
Schmidt, H. 1986. Industrial particleboard: Application manufacturing features. In: Proc. of the 20th WSU Materials Symp. T.M. Maloney, Ed. Washing State Univ., Pullman, WA, pp. 343-354. special International
Particleboard/Composite Tor, O., Yu, X., Characteristics of torques for driving screws into wood-based composites. Wood Fiber Sci 47(1).
Yu, X., Tor, O., Quin, F., Seale, D., Zhang, J., 2015. Screwdriving torques in particleboards. Wood Fiber Sci 47(2).
Zhang, J. and Eckelman, C. 2002. Holding strength of screws in plywood and oriented strandboard. Forest Prod J 52(6):55-62.