Adaptive Machining Control via Tool Position Power
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Solution Overview
Problem
Adaptive control systems in machine tools are not effective in bevel gear manufacturing processes like bevel gear grinding, as they cannot directly measure and process the varying tool engagement, leading to inefficient process optimization and increased operator expertise requirements.
Innovation Solution
Determining a desired power level as a function of relative tool to workpiece position, using specific power and contact width, to maintain a constant load and enhance adaptive control in grinding processes, such as bevel gear grinding from solid, by expressing set point power in terms of roll or plunge position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adaptive control systems use bulk power measurement to regulate feed rate, then process stability improves, but the system cannot effectively handle varying tool engagement conditions in bevel gear manufacturing
Solution Approach 1:
The patent applies dynamics by making the adaptive control system adjustable and responsive to changing conditions. The control system dynamically modifies feed rate based on real-time power measurements and tool engagement detection, allowing it to adapt to varying tool engagement conditions throughout the machining process while maintaining process stability
Solution Approach 2:
The patent implements feedback by continuously monitoring tool spindle power and using this information to regulate feed rate. The system measures actual power consumption during machining and feeds this information back to the control algorithm, which then adjusts the feed rate to maintain optimal power levels and constant load per grit
2Extent of automation
If adaptive control systems are implemented in bevel gear manufacturing, then operator intervention is reduced, but operator expertise and tuning knowledge are required to set up the system
Solution Approach 1:
The patent applies self-service by enabling the adaptive control system to automatically detect tool engagement conditions and self-regulate feed rate without requiring operator intervention during machining. The system autonomously monitors power consumption, detects tool engagement variations, and adjusts feed rate automatically, eliminating the need for continuous operator monitoring and manual adjustments
3Reliability
If constant bulk power is maintained during machining, then tool and workpiece damage is reduced, but load per grit varies drastically when tool engagement changes
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the feed rate parameter in response to detected tool engagement conditions. When tool engagement increases, the system reduces feed rate to maintain constant load per grit, and when engagement decreases, it increases feed rate. This parameter adjustment maintains both tool protection and optimal machining conditions throughout the process
Data Source
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AI summary
A method of determining a desired power level (P) as a function of relative tool to workpiece position, thereby enabling adaptive control advantages that were previously inaccessible for machining, such as bevel gear grinding, from solid applications. Preferably, set point power is expressed as a function of specific power (?', P") and roll position (Q) for a generated gear or as a function of specific power and plunge position for a non-generated (i.e. Formate) gear. Specific power is defined and preferably remains as defined during machining even as process conditions vary during machining.