Drvna industrija, Vol. 73 No. 4, 2022.
Original scientific paper
https://doi.org/10.5552/drvind.2022.2114
Effects of Exposure Time and Temperature on Screw Driving Torques in Heat-Treated Anatolian Black Pine and Sessile Oak Wood
Mehmet Karamanoglu
; Kastamonu University, Tosya Vocational School, Department of Materials and Materials Processing Technologies, Kastamonu, Turkey
Önder Tor
; Kastamonu University, Forestry Faculty, Department of Forest Industry Engineering, Kastamonu, Turkey
Abstract
This study aimed to investigate the characteristics of screw driving torques in heat-treated Anatolian black pine and sessile oak wood. The wood samples were subjected to heat under atmospheric pressure at three different temperatures (130, 180 and 230 °C) and two different exposure time levels (2 and 8 h). Screw driving torques of seating and stripping torque (SET and STT) was performed on all samples. The process of screw driving had two main torques, one of which was the seating torque defined as the torque required to clamp parts and the other one was the stripping torque defined as the maximum torque right before the screw strips in the material and the torque drops suddenly because of the formed screw threads being stripped in wood material. Results show that, in both wood species, the SET and STT values decreased due to the increase in heat treatment temperature and exposure time compared to the control groups.
Keywords
screw; pilot hole; seating torque; heat-treated wood
Hrčak ID:
285712
URI
Publication date:
15.11.2022.
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