Milling Feed Rate Control via Deflection Estimation
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Solution Overview
Problem
Components often deflect during milling operations due to cutting forces, making it difficult to maintain accuracy in component dimensions, as measuring deflections is challenging and existing technologies do not effectively address this issue.
Innovation Solution
A system that adjusts the feed rate of a milling tool based on estimated deflection by determining the force applied and using compliance tensor data to compare against deflection criteria, thereby reducing the force and deflection, ensuring accurate milling operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high feed rate is used during milling operations, then productivity is improved, but manufacturing precision deteriorates due to increased cutting forces causing component deflection
Solution Approach 1:
The system dynamically adjusts the feed rate during milling operations based on real-time monitoring of component deflection. The feed rate is not fixed but varies continuously to maintain deflection within acceptable limits while maximizing material removal rate, resolving the contradiction between productivity and precision
Solution Approach 2:
The system implements a closed-loop feedback mechanism where component deflection is measured during milling, compared against target deflection criteria, and used to automatically adjust the feed rate. This feedback control enables the system to maintain manufacturing precision while optimizing productivity through adaptive feed rate modification
2Manufacturing precision
If a low feed rate is used during milling operations, then manufacturing precision is improved by reducing cutting forces and component deflection, but productivity deteriorates
Solution Approach 1:
The system changes the feed rate parameter dynamically based on the actual component deflection state. By adjusting this critical parameter in real-time, the system achieves high precision when needed (low feed rate) and high productivity when possible (high feed rate), eliminating the need to choose between the two extremes
3Manufacturing precision
If the feed rate is adjusted frequently to maintain precision, then manufacturing precision is improved, but device complexity increases due to additional control systems
Solution Approach 1:
The system uses the milling machine's own measurement capabilities and control systems to automatically monitor and adjust feed rate without requiring external complex equipment. The existing machine tools and controllers are utilized to their full capability, achieving precision through self-service rather than adding external complexity
Data Source
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AI summary
An estimated force applied by a milling tool at a surface point of a component is determined during milling operations of the component. An estimated deflection of the component associated with the estimated force is determined using the estimated force and a compliance tensor of the component corresponding to the surface point of the component. The estimated deflection of the component is compared to one or more deflection criteria. A feed rate of the milling tool is adjusted during the milling operations of the component based on results of the comparing.