Porous Protective Layer for Vacuum Table Nesting Surfaces
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Solution Overview
Problem
Existing machine tools for nesting operations face issues such as tool-induced grooves on the martyr panel, leading to reduced vacuum holding force, increased downtime for flattening, and eventual panel replacement, along with insufficient friction causing incorrect cuts and increased waste.
Innovation Solution
The implementation of a machine tool with an improved work surface featuring a protective layer of porous material, such as a non-woven fabric or net, placed between the martyr panel and the panel to be machined, which enhances friction and prevents direct contact between the tool and the martyr panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If through-type machining is performed on the martyr panel, then the panel can be cut completely through, but grooves are caused on the martyr panel surface
Solution Approach 1:
A protective layer is introduced as an intermediary element between the martyr panel and the workpiece. This layer absorbs the mechanical impact of the cutting tool, preventing direct contact with the martyr panel surface while still allowing vacuum transmission through its porous structure.
Solution Approach 2:
The protective layer is made of porous material that allows vacuum to pass through while providing mechanical protection. The porous structure enables vacuum transmission to hold the workpiece firmly, while the material body absorbs cutting forces and prevents surface grooving.
2Productivity
If the martyr panel is used repeatedly for machining, then production can continue, but the holding force of the vacuum decreases due to excessive grooves
Solution Approach 1:
The protective layer serves as a sacrificial intermediary that protects the martyr panel from direct tool contact. By absorbing cutting forces, it maintains the martyr panel's surface integrity and vacuum transmission capability over repeated use cycles.
Solution Approach 2:
The protective layer is designed as a consumable component that can be easily replaced when worn. It acts as a disposable barrier that protects the expensive martyr panel, requiring only simple replacement rather than complex restoration.
3Ease of operation
If the martyr panel is flattened repeatedly to restore surface flatness, then the work surface can be reused, but time is lost and productivity decreases
Solution Approach 1:
The protective layer is installed in advance to prevent surface degradation before it occurs. By providing continuous protection during machining operations, it eliminates the need for periodic flattening interventions and maintains consistent vacuum holding capability.
Solution Approach 2:
The protective layer enables continuous machining operations without interruption for flattening. It maintains the functional integrity of the martyr panel surface throughout extended use, allowing uninterrupted production cycles.
4Productivity
If the martyr panel is used extensively, then machine operation continues, but the panel thickness becomes too small requiring replacement
Solution Approach 1:
The protective layer acts as a buffer that distributes mechanical stresses away from the martyr panel structure. This reduces wear and structural degradation, extending the martyr panel's service life while maintaining machine productivity.
Solution Approach 2:
The protective layer provides preemptive cushioning against tool impacts and mechanical stresses. This beforehand protection prevents cumulative damage that would otherwise thin and weaken the martyr panel over time.
5Manufacturing precision
If friction between the martyr panel and workpiece is increased to prevent movement, then cutting accuracy improves, but the workpiece may stick excessively
Solution Approach 1:
The porous protective layer provides controlled friction through its textured surface structure. It generates sufficient friction to prevent workpiece movement during cutting while its porous nature allows easy release after machining by maintaining vacuum hold until deliberately released.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces the need for frequent flattening and panel replacement, increases productivity by minimizing machine downtime, and improves cutting accuracy by maintaining sufficient vacuum holding force and friction during machining.
Implementation Method 1
The support surface of the working center is equipped with vacuum outlets, connected to a vacuum generation device, in particular a vacuum pump. The panel to be machined, placed on the martyr panel, is held in position by the vacuum, which is transmitted to the panel to be machined by the vacuum generation device, via the vacuum outlets and through the martyr panel
Implementation Method 2
at least one protective layer of porous material, adapted to be placed between said base panel and said panel during machining so as to prevent contact between said tool and said base panel
Data Source
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AI summary
The present invention concerns a machine (M) for working a panel (P) in wood or similar materials, in composite, polymeric, ceramic material or other materials, comprising a support plane (1) to support said panel (P), at least one machining head (2), opposite said support surface (1) and equipped with a tool (3) to work said panel (P), a base panel (4), arranged on said support plane (1), characterized in that it comprises at least one protective layer (5) of porous material, adapted to be placed between said base panel (4) and said panel (P) during machining so as to prevent contact between said tool (3) and said base panel (4).