Floorboard Calibrating Groove for Thickness Tolerance Compensation
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Solution Overview
Problem
The variation in thickness of floorboards during manufacturing leads to difficulties in locking them together, especially when no underlying foam is used, as the tongue and tongue groove may not align properly, hindering the locking mechanism.
Innovation Solution
Incorporating a calibrating groove on the second floorboard that allows it to be bent downwards towards the sub-floor, aligning with the first floorboard, and a locking strip with a locking element that cooperates with a locking groove for horizontal locking, facilitating the assembly of floorboards with different thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If floorboards are manufactured with standard tolerances, then production cost and time are reduced, but thickness variation causes misalignment of locking mechanisms
Solution Approach 1:
The patent changes the geometric parameter of the floorboard edge by introducing a calibrating groove that modifies the effective thickness at the locking region. This allows the locking surfaces to align properly even when the overall floorboard thickness varies within manufacturing tolerances, thus maintaining locking mechanism functionality without requiring tighter manufacturing precision
Solution Approach 2:
The patent segments the floorboard edge into different functional zones: the main body thickness and the localized calibrating groove region. This segmentation allows the locking mechanism to operate at a specific calibrated height while the rest of the floorboard maintains its original thickness, enabling tolerance compensation without affecting overall production simplicity
2Ease of operation
If no underlying foam is used, then installation simplicity is improved, but thickness variation prevents proper locking engagement
Solution Approach 1:
The calibrating groove is pre-formed as an integral part of the floorboard during manufacturing, enabling the floorboard to self-calibrate its locking surface position without requiring external foam materials or additional installation steps. This maintains installation simplicity while ensuring reliable locking engagement through the built-in geometric compensation feature
3Reliability
If a calibrating groove is added to compensate for thickness variation, then locking reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The calibrating groove is implemented as a localized geometric feature only at the edge region where the locking mechanism operates, rather than modifying the entire floorboard structure. This localized approach provides the necessary thickness compensation for reliable locking while minimizing the overall structural complexity and material usage
Data Source
AI summary
Floorboards provided with a mechanical locking system including a locking strip protruding from a first edge of a first floorboard. The locking strip is provided with a locking element configured to cooperate with a locking groove at a lower side of a second edge of a second floorboard for locking the first edge and the second edge in a horizontal direction. The first edge and the second edge are configured to be assembled by a vertical downward motion of the second edge towards the first edge. The second edge is provided with a calibrating groove adjacent the locking groove. Also, a method for producing a mechanical locking system.