Lower Tolerance Limits for Screw Withdrawal in Wood

Uysal, Mesut; Haviarová, Eva

doi:10.22382/wfs-2019-036

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…Screws are the most commonly used fasteners in products manufactured using wood materials. In the construction of furniture, screws are frequently used for a variety of purposes, including connecting tops to tables, cabinets, and bases, attaching shelves to end members, framing cabinets, and installing hardware [12,13]. The rigidity of furniture and accessories in screw joints largely depends on the screw withdrawal resistance of the screws used in the connections and the wooden materials used in production.…”

Section: Introductionmentioning

confidence: 99%

Effect of Freeze–Thaw Cycling on the Screw Direct Withdrawal Resistance of Beech, Ozigo, and Okoume Plywoods

Birinci

Kaymakçı

2023

Forests

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Wood has been used in the construction, furniture, and automotive industries since ancient times. In areas where wood material is used, it is combined with various fasteners. The durability of the products produced using wooden materials depends on the performance of the fasteners. Since wood is a hygroscopic and biodegradable material, various changes occur in its structure when exposed to external weather conditions. Wood materials used especially in the field of construction and urban furniture are exposed to effects such as extreme temperatures, freezing, moisture, or drying depending on the seasons. In this study, the effect of the freeze–thaw cycling (FTC) process on screw direct withdrawal resistance (SDWR) of plywood produced from beech, ozigo, and okoume species was investigated. In this context, the effects of screwing time (before or after), screw orientation (face or edge), the number of cycles (0 to 7) in the FTC process, and plywood type parameters on SDWR were investigated. As a result of the tests, when the mean SDWR values were examined according to the plywood type, the highest values were obtained in beech, ozigo, and okoume plywood, respectively. Considering the screwing time parameter, it was determined that there was no statistically significant difference between the mean SDWR values in other plywood types except beech plywood (p < 0.05). When the screw orientation parameter was examined, screwing in the face direction gave better results than screwing in the edge direction in all plywood types. There was a decrease in the mean SDWR values that was inversely proportional to the increase in the number of cycles in FTC-treated plywood.

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Section: Introductionmentioning

confidence: 99%

Effect of Freeze–Thaw Cycling on the Screw Direct Withdrawal Resistance of Beech, Ozigo, and Okoume Plywoods

Birinci

Kaymakçı

2023

Forests

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“…Screw-type fasteners are used in not only joints but also handle, hinge and lock (Örs et al 1998). Studies related to joints with screws have been conducted with the technological development in wood composites and engineered wood since the strength design of furniture was de ned in the 1940s (Eckelman 1973;Smardzewski 2009;Uysal and Haviarova 2019). Such studies will continue to be conducted to enhance the strength of screw joints as long as the furniture is the greatest need of people's living spaces and new technological developments emerge in the eld.…”

Section: Introductionmentioning

confidence: 99%

Effect of Epoxy Resin Reinforcement on Screw Withdrawal Strength of Fiberboard and Particleboard Used in the Furniture Industry

Uysal

Tasdemir

Memis

2023

Preprint

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The study aimed to increase the screw withdrawal strength (SWS) of Medium Density Fiberboard (MDF) and Particleboard (PB) used in furniture strength by using epoxy resin in the screw pilot hole. Therefore, the effects of pilot hole diameters, screw diameter, and amount of epoxy resin on SWS of MDF and PB from face and edge were investigated. According to BS EN 13446, a dimension of 50 x 50 mm specimens was cut from commercial MDF and PB boards. A static load was applied parallel to the screw direction. The SWS of MDF was higher than the SWS of PB because of its density. Besides, the SWS of MDF and PB samples with a 3.5 mm screw diameter were higher compared to those with a 4.5 mm screw diameter. A decrease in pilot hole diameter and an increase in the amount of epoxy resin provided higher SWS of materials. Using 20% epoxy resin of the volume of the pilot hole resulted in two times better SWS values. The study showed that a higher amount of epoxy resin, smaller pilot hole diameter, and smaller screw diameter contribute to better SWS of both MDF and PB from the face and edge.

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Use of lower tolerance limits for designing chair frames with round-end mortise and tenon joints

Uysal,

Kuskun,

Smardzewski

et al. 2024

Wood Material Science & Engineering

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Lower Tolerance Limits for Screw Withdrawal in Wood

Cited by 6 publications

References 19 publications

Effect of Freeze–Thaw Cycling on the Screw Direct Withdrawal Resistance of Beech, Ozigo, and Okoume Plywoods

Effect of Freeze–Thaw Cycling on the Screw Direct Withdrawal Resistance of Beech, Ozigo, and Okoume Plywoods

Effect of Epoxy Resin Reinforcement on Screw Withdrawal Strength of Fiberboard and Particleboard Used in the Furniture Industry

Use of lower tolerance limits for designing chair frames with round-end mortise and tenon joints

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