Capacitive Die Alignment Sensing in Precision Forging
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Solution Overview
Problem
Precision forging processes for gas turbine engine components face challenges in maintaining tight dimensional controls due to misalignment and variability in die alignment, leading to increased material waste and setup time, as existing data streams are limited for informing engineering actions to improve process controls.
Innovation Solution
A forging assembly equipped with capacitive sensors to measure distances between dies in multiple directions, coupled with a data acquisition system and forge press controller, allowing for real-time monitoring and adjustment of die alignment and operating parameters to ensure precise alignment and reduce setup time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional forging processes are used without sensors, then the equipment complexity is low, but the manufacturing precision and ability to maintain tight dimensional controls deteriorate due to misalignment and variability in die alignment
Solution Approach 1:
The patent replaces mechanical alignment verification methods with capacitive sensors that use electrical fields to measure die alignment and position. This substitution enables precise measurement of die gaps and alignment without complex mechanical measurement systems, thereby improving manufacturing precision while keeping device complexity manageable.
Solution Approach 2:
The patent implements feedback by using capacitive sensors to continuously monitor die alignment and position during the forging process, and feeding this information back to the control system. This enables real-time adjustments to maintain tight dimensional controls, resolving the contradiction between precision and complexity through intelligent control.
2Manufacturing precision
If multiple sensors are installed to measure die alignment in multiple directions, then the manufacturing precision improves, but the device complexity and loss of time for installation increase
Solution Approach 1:
The patent makes the capacitive sensors multi-functional by designing them to measure multiple parameters (die gap, alignment, position) simultaneously with a single sensor unit. This eliminates the need for separate sensors for each measurement, thereby improving die alignment accuracy while reducing installation time and complexity.
Solution Approach 2:
The patent combines multiple measurement capabilities into integrated capacitive sensor assemblies that can detect alignment and position information in multiple directions simultaneously. This merging of functions reduces the number of separate components to be installed, resolving the contradiction between precision and installation time.
3Productivity
If traditional alignment verification methods are used, then the ease of operation is maintained, but the productivity decreases due to time-consuming die installation and alignment confirmation
Solution Approach 1:
The patent replaces manual alignment verification procedures with automated capacitive sensor-based measurement systems. This substitution dramatically reduces setup time by eliminating manual measurement and adjustment processes, thereby improving productivity while maintaining ease of operation through automated control.
Solution Approach 2:
The patent implements self-service by enabling the system to automatically measure and verify die alignment using capacitive sensors, without requiring operator intervention for manual measurement. The control system automatically processes sensor data and makes adjustments, improving both productivity and ease of operation.
4Reliability
If limited data streams are used in the forging process, then the device complexity is low, but the reliability of process control deteriorates due to inability to detect sources of variability
Solution Approach 1:
The patent implements comprehensive feedback by using capacitive sensors to continuously monitor critical process parameters (die alignment, position, gap) and feeding this data back to the control system. This enables real-time detection of process variability and sources of error, dramatically improving process control reliability through informed engineering actions.
Solution Approach 2:
The patent introduces capacitive sensors as intermediary measurement devices that bridge the gap between the physical forging process and the control system. These sensors provide rich data streams about die alignment and position, enabling reliable process control without requiring complex direct measurement systems.
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 implementation of capacitive sensors and data acquisition systems in forging assemblies enables accurate and rapid die alignment, reducing variability and setup time, thereby producing dimensionally accurate components while improving part yield and reducing material waste.
Implementation Method 1
the first sensor may comprise a capacitive sensor
Data Source
AI summary
A forging assembly may comprise a first die and a second die configured to translate toward the second die. A first sensor may be coupled to at least one of the first die or the second die. The first sensor may be configured to output a first signal correlating to a first distance between the first die and the second die. Additional sensors may be applied to track die alignment during the forging process.