Wave-Contour Wooden Nail for High Pull-Out Without Wood Damage
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Solution Overview
Problem
Existing wooden nails often damage both their structure and the surrounding wood matrix during installation, compromising their pull-out values.
Innovation Solution
A wooden nail with a shaft featuring a wave-shaped contour and repeated diameter changes, which minimizes damage to both the nail and the surrounding wood matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the outer surface of the wooden nail is welded to the receiving wooden component using lignin at high driving speed (at least 30 m/sec), then high pull-out values are achieved, but the wooden nail structure and the wood matrix are damaged
Solution Approach 1:
The shaft is given a wave-shaped contour with repeating diameter changes instead of a straight cylindrical shape. This curved, wave-like geometry allows the nail to flex and distribute impact forces during driving, reducing structural damage while maintaining high pull-out values through the same welding process
2Strength
If the driving speed is increased to at least 30 m/sec to achieve high pull-out values, then the welding process is effective, but damage to the wooden nail and wood matrix increases
Solution Approach 1:
The wave-shaped contour with curved surfaces absorbs and distributes the kinetic energy from high-speed driving, enabling the nail to withstand higher driving speeds without damage while maintaining the required welding effectiveness for high pull-out values
Data Source
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AI summary
Wooden nail, consisting of a shaft and a tapered region arranged at least at one end, wherein the diameter of the shaft has repeated diameter changes in the longitudinal direction. The object of the invention is therefore to create a wooden nail which, on the one hand, has high pull-out values and, on the other hand, is not damaged in its structure or the surrounding wood matrix of the receiving wooden component when driven in. The object is achieved by a wooden nail consisting of a shaft and a tapered region arranged at least at one end, wherein the diameter of the shaft has repeated diameter changes in the longitudinal direction, in that the shaft at least partially has a wave-shaped contour in which the diameter of the wave crests corresponds at most to the shaft diameter.