Adaptable Vacuum Pod System for CNC Router Workholding
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Solution Overview
Problem
Existing CNC router systems face challenges in efficiently switching between workpiece shapes due to the need for new setups on the vacuum table, which complicates the balancing of holding force, cost, and ease of setup/changeover.
Innovation Solution
A versatile pod system configured for use with CNC machines and robot arm operations, featuring a grid and pod platform base assembly that can be attached to a vacuum system, a vacuum pod that engages the grid and platform base assembly, and a marker holder assembly for marking desired shapes on the port board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated fixtures or pod systems are used to hold workpieces, then holding force and security are improved, but device complexity and cost increase
Solution Approach 1:
The system divides the workholding function into modular components: a vacuum table base, removable pod units with gaskets, and individual workpieces. Each pod can be independently positioned and sealed, allowing complex workpieces to be held through multiple discrete vacuum zones rather than requiring a monolithic fixture system.
Solution Approach 2:
The vacuum table with its grid of ports serves multiple functions: it can accommodate various pod configurations, support different workpiece shapes and sizes, and provide consistent vacuum holding across all applications. The same base system replaces the need for multiple dedicated fixtures for different workpiece types.
2Device complexity
If traditional clamping methods are used, then device complexity is reduced, but manufacturing precision and surface quality deteriorate due to marks and indentations
Solution Approach 1:
The system uses vacuum pressure (pneumatics) to apply uniform, distributed holding force across the workpiece surface through the gasket seal. This replaces mechanical clamping forces that concentrate stress at contact points and create marks, while the vacuum method distributes pressure evenly and removes no material or surface finish.
3Adaptability or versatility
If vacuum tables with multiple ports and valves are used, then adaptability for different workpiece shapes is improved, but ease of operation deteriorates due to complex setup requirements
Solution Approach 1:
The vacuum table interface is segmented into multiple independently controllable ports arranged in a grid pattern. Each port can be individually opened or closed using simple valves, allowing operators to quickly adapt the vacuum zones to match different workpiece shapes without reconfiguring the entire system.
Solution Approach 2:
The system allows dynamic reconfiguration of vacuum zones by individually controlling the state of each port/valve combination. Operators can open valves corresponding to areas where workpieces need to be held and close others, enabling rapid adaptation to different workpiece geometries without physical reassembly.
4Force
If pod systems with gaskets are used, then workpiece holding force is improved, but ease of manufacture and cost increase
Solution Approach 1:
The system uses flexible gaskets made of elastomeric or rubber-like materials that can be easily formed into various shapes and sizes. These gaskets are inexpensive to manufacture and can be custom-cut to match specific workpiece contours, providing effective sealing and vacuum holding without requiring expensive precision-machined fixtures.
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
The pod system allows for unrestricted placement of vacuum pods, accurate z-axis positioning, and unobstructed use of the Dry-Erase Marking System, enhancing the efficiency and versatility of CNC machining operations by simplifying the setup process for different workpiece shapes.
Implementation Method 1
A vacuum table uses a vacuum pump to create a suction force that holds the workpiece firmly against the table's surface
Implementation Method 2
These fixtures include gaskets between the table and the workpiece to create a seal with the vacuum table, ensuring a strong hold
Data Source
AI summary
A versatile pod system configured for use with a CNC machines and robot arm operations includes: a grid and pod platform base assembly configured for attachment to a vacuum system and capable of drawing a vacuum therethrough; a vacuum pod that engages the grid and pod platform base assembly; and a marker holder assembly that holds a marker and mark the grid and platform base assembly with an outline in a desired shape.