Capacitance-Sensed Forging Die Alignment for Precision Setup
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Solution Overview
Problem
Precision forging processes, such as those for gas turbine engine components, face challenges in maintaining tight dimensional controls due to misalignment and variability in die alignment, which leads to increased material waste and setup time, as existing methods lack effective data streams for improving process controls.
Innovation Solution
A forging assembly equipped with capacitance sensors that measure die closure and alignment behavior in real-time, allowing for precise tracking of die position, velocity, acceleration, and elastic deformation, and enabling rapid and accurate die alignment through a data acquisition system and forge press controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional forging methods are used without advanced sensing, then device complexity is reduced, but manufacturing precision deteriorates due to inability to detect and correct die misalignment
Solution Approach 1:
The patent replaces complex mechanical alignment verification systems with electrical capacitance sensing. Capacitance sensors measure die position and alignment through electrical fields rather than mechanical contact, providing high-precision measurement without adding mechanical complexity to the forging press structure.
Solution Approach 2:
The patent introduces capacitance sensors as intermediary devices between the dies and the measurement system. These sensors act as mediators that convert physical die position into electrical signals that can be processed by the data acquisition system, enabling precise measurement without direct mechanical interaction.
2Loss of time
If manual die alignment verification is used, then device complexity is minimized, but loss of time increases due to time-consuming alignment confirmation
Solution Approach 1:
The system performs self-verification of die alignment through automated capacitance measurement. The data acquisition system automatically captures sensor data, processes alignment information, and provides feedback without requiring manual intervention, enabling the system to self-check and self-correct alignment issues.
Solution Approach 2:
The patent implements a feedback loop where capacitance sensors continuously monitor die position and alignment, the data acquisition system processes this information, and the system adjusts die positioning based on the feedback. This closed-loop control eliminates manual alignment verification time.
3Manufacturing precision
If limited data streams are used for process monitoring, then device complexity is reduced, but manufacturing precision deteriorates due to inability to detect sources of variability
Solution Approach 1:
The patent segments the monitoring function into multiple independent capacitance sensors positioned at different locations on the dies. Each sensor provides localized measurement data, and the data acquisition system integrates these segmented data streams to create a comprehensive view of die alignment and process variables.
Solution Approach 2:
The data acquisition system is designed to perform multiple functions: capturing capacitance sensor data, processing alignment calculations, monitoring die position, detecting elastic deformation, and providing feedback control. This multi-functional system replaces multiple separate monitoring devices.
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 solution reduces material waste and setup time by providing high-precision data for improving part dimensional yields and reducing variability in forging processes, ensuring the production of dimensionally accurate components.
Implementation Method 1
a first sensor coupled to the first die and configured to output a first signal correlating to a first distance between the first die and the second die
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A forging assembly (150) comprises a first die (152) and a second die (154) configured to translate toward the second die (154). A first sensor (160a) is coupled to at least one of the first die (152) or the second die (154). The first sensor (160a) is configured to output a first signal correlating to a first distance between the first die (152) and the second die (154). Additional sensors (160b, 160c) may be applied to track die alignment during the forging process.