Dual Rotating Cutter Profile Cutting Wood Edge Splintering
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Solution Overview
Problem
Existing methods for cutting profiles in workpieces, such as wooden workpieces, often result in damage due to splintering as the cutting tool exits the workpiece, leading to unwanted material removal and potential damage to the workpiece.
Innovation Solution
A system utilizing two rotatable cutting tools supported for rotation about parallel axes, with a workpiece positioned between them, allowing for controlled cutting engagement and exit to prevent damage by halting movement before the cutting tool exits the workpiece's edge, and using a clamping mechanism to apply uniform pressure and limit the cutting distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single cutting tool is used to cut a profile in a workpiece, then the cutting operation is simple, but the workpiece is likely to be damaged by splintering as the cutting tool exits the workpiece
Solution Approach 1:
The invention divides the cutting operation into two separate cutting tools positioned at different locations. The first cutting tool cuts from one end of the workpiece while the second cutting tool cuts from the other end, allowing each tool to exit the workpiece at its respective end rather than both tools exiting at the same trailing edge, thereby preventing splintering damage.
Solution Approach 2:
The invention reverses the conventional approach by having two cutting tools work from opposite ends of the workpiece simultaneously or sequentially. Instead of one tool entering and exiting the same end, both tools enter from opposite ends and meet in the middle, so that neither tool exits through the trailing edge of the workpiece, eliminating the splintering problem.
2Object-affected harmful factors
If a sacrificial workpiece is placed adjacent to the trailing edge to prevent damage, then the workpiece is protected from splintering, but the device complexity and material usage increase
Solution Approach 1:
The invention removes the need for a sacrificial workpiece by extracting the problematic element (the trailing edge exit point) from the cutting path. By positioning cutting tools at opposite ends, the design eliminates the condition that would require a sacrificial piece, thereby reducing device complexity and material waste.
Solution Approach 2:
The invention uses two cutting tools instead of one, performing more cutting actions than strictly necessary for a single pass. This excessive action from opposite directions prevents the harmful exit condition, achieving protection without needing additional sacrificial materials or complex support configurations.
3Productivity
If the cutting tool is allowed to exit the workpiece to complete the cut, then the cutting operation is efficient, but the workpiece experiences splintering and damage
Solution Approach 1:
The cutting operation is segmented into two independent cutting paths from opposite ends. Each cutting tool can complete its full cutting stroke and exit its respective end of the workpiece without causing damage, maintaining high productivity while ensuring cut quality because neither tool exits through the trailing edge where splintering occurs.
Solution Approach 2:
By inverting the cutting approach and working from both ends simultaneously, the invention allows both cutting tools to exit the workpiece at their starting ends rather than the trailing edge. This maintains cutting efficiency while preserving cut quality, as the exit points are at the entry ends where the workpiece structure can better accommodate the exit without splintering.
Data Source
AI summary
A system for cutting a profile along a linear edge of a wooden workpiece utilizes two spaced-apart rotatable cutting tools which are mounted for rotation in opposite rotational directions and a support surface for supporting the workpiece for movement along each of the two cutting tools. By positioning the workpiece upon the support surface so that the linear edge thereof extends between the two cutting tools, the workpiece can be moved into cutting engagement with a first of the cutting tools and subsequently into cutting engagement with the second of the cutting tools. By subsequently reversing the movement of the workpiece along the first cutting tool before the cutting edges thereof exit a trailing (side) edge of the workpiece, the likelihood that the workpiece will be damaged from the profile-forming process is reduced.