Adaptive Vacuum Clamping for Thin-Walled Curved Turning
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Solution Overview
Problem
Existing vacuum adsorption clamping devices for thin-walled curved components struggle to meet the differentiated clamping demands in different process stages, leading to clamping deformation and poor machining precision due to unbalanced stress accumulation.
Innovation Solution
A clamping system with a pneumatic circuit and electromagnetic control circuit, featuring multiple sub-circuits and vacuum channels, allows adaptive clamping modes to manage stress release and deformation in semi-precision and precision machining stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vacuum adsorption clamping is applied to thin-walled curved components, then clamping reliability is improved, but clamping deformation increases due to unbalanced stress accumulation
Solution Approach 1:
The vacuum adsorption fixture is segmented into multiple independent vacuum chambers (first vacuum chamber, second vacuum chamber, third vacuum chamber) with separate vacuum channels. This allows different clamping forces to be applied to different regions of the workpiece, enabling stress balance while maintaining overall clamping reliability.
Solution Approach 2:
Different vacuum degrees are applied to different vacuum chambers based on the local stress state and machining requirements. The first vacuum chamber uses a first vacuum degree, the second vacuum chamber uses a second vacuum degree, and the third vacuum chamber uses a third vacuum degree, allowing localized optimization of clamping force to prevent deformation while maintaining reliability.
2Device complexity
If fixed clamping mode is used in vacuum adsorption device, then device complexity is reduced, but adaptability to different machining stages deteriorates
Solution Approach 1:
The vacuum adsorption device transitions from a fixed clamping mode to a dynamic adaptive clamping mode. The system automatically adjusts the vacuum degree in each chamber based on real-time machining stage detection, enabling the device to adapt to different machining requirements without increasing structural complexity.
Solution Approach 2:
The system incorporates feedback mechanisms to detect the current machining stage and automatically adjusts the vacuum degrees in different chambers accordingly. This feedback control enables the device to adapt to semi-precision machining, precision machining, and other stages without requiring complex manual reconfiguration.
3Productivity
If material removal increases during machining, then machining progress is improved, but unbalanced stress accumulation worsens leading to deformation
Solution Approach 1:
The system implements periodic adjustment of vacuum degrees during the machining process. As material removal progresses and unbalanced stress accumulates, the vacuum degrees in different chambers are periodically adjusted to maintain stress balance, allowing continuous machining progress while preventing deformation.
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 system effectively reduces stress deformation and improves machining precision by adaptively adjusting clamping modes, balancing stress during machining and enhancing component stability.
Implementation Method 1
The method uses the pressure difference between the vacuum chambers in the fixture and the atmosphere to press thin-walled curved components on the surface of the fixture
Implementation Method 2
a clamping system and an adaptive clamping method for turning of curved components, so as to solve the problem that the existing vacuum adsorption clamping device is difficult to meet the optimal clamping demand of curved components in different process stages
Data Source
AI summary
The present invention discloses a clamping system and an adaptive clamping method for turning of thin-walled curved components. A curved component is positioned and clamped on the upper surface of the vacuum adsorption fixture, and a rubber sealing ring on an auxiliary support of the fixture is in contact with the inner contour of the curved surface to separate the closed space in the component into three independent adsorption force action areas: a flange end surface, a first vacuum chamber and a second vacuum chamber; and three independent vacuum channels are arranged in the fixture, the vacuum channels are communicated with sub-circuits through pneumatic hoses, and the on-off of the circuits is controlled by electromagnetic directional valves. The vacuum adsorption clamping system with multiple clamping modes can be adaptively adjusted according to the process stage of curved components.