Segmented Vacuum Table for Selective Workpiece Removal
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Solution Overview
Problem
Existing vacuum tables lack flexibility in securing workpieces during machining, as they apply uniform suction to the entire surface, making it difficult to remove cut parts without losing registration of the sheet material.
Innovation Solution
A vacuum table segmented into individual chambers, allowing selective control of vacuum pressure at different locations, enabling suction to be applied only where needed during cutting and removed after cutting, while maintaining suction on the sheet material for registration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If uniform vacuum suction is applied to the entire vacuum table surface, then the workpiece is securely held during machining, but it becomes difficult to remove cut parts without losing registration of the sheet material
Solution Approach 1:
The vacuum table is divided into multiple independent vacuum chambers (first vacuum chamber, second vacuum chamber, third vacuum chamber) that can be controlled separately. This allows selective application of vacuum to different regions, enabling part removal from one chamber while maintaining sheet registration in other chambers.
Solution Approach 2:
Different regions of the vacuum table have different vacuum states - the first vacuum chamber maintains vacuum for sheet registration while the second and third chambers can be depleted to allow part removal. This local differentiation resolves the contradiction between holding the sheet and releasing parts.
2Ease of operation
If the vacuum pump is shut off to remove the workpiece, then the workpiece can be removed from the table top, but the sheet material loses its registration
Solution Approach 1:
The vacuum system is segmented into independent chambers with separate control. The first vacuum chamber maintains continuous vacuum for sheet registration, while the second and third chambers can be independently depleted for workpiece removal, eliminating the need to shut off the entire vacuum system.
Solution Approach 2:
Instead of applying vacuum to the entire table or shutting off the complete system, only the necessary portions (second and third chambers) are depleted for workpiece removal, while the first chamber maintains partial vacuum action to preserve sheet registration.
3Adaptability or versatility
If the vacuum table is segmented into individual vacuum chambers with selective control, then flexibility in machining is improved, but the device complexity increases
Solution Approach 1:
The vacuum table is divided into three independently controllable vacuum chambers, each with its own vacuum pump and control system. This segmentation provides flexibility to apply vacuum selectively to different regions during machining operations.
Solution Approach 2:
The segmented vacuum chamber design serves multiple functions: holding the sheet material in registration (first chamber), securing workpieces during machining (second and third chambers), and enabling selective part removal. This multi-functionality justifies the increased structural complexity.
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 approach allows for flexible machining by enabling parts to be cut and removed without losing sheet registration, speeding up processes, reducing errors, and optimizing material use by allowing continuous machining without re-registering the sheet.
Implementation Method 1
A vacuum pump continuously applies suction to the vacuum chamber so that a workpiece is held against the table top
Implementation Method 2
A typical vacuum table includes a porous or perforated table top connected to a vacuum chamber
Data Source
AI summary
A vacuum table for securing a sheet of material. The vacuum table includes a top plate that is porous, a perimeter vacuum chamber disposed beneath a perimeter of the top plate, and interior vacuum chambers bound by the perimeter vacuum chamber and disposed beneath a target area of the top plate that is inside the perimeter of the top plate.