Machining Fixture Contact Sensing for Secure Part Seating
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Solution Overview
Problem
The frequent misloading of gas turbine engine components into machining fixtures leads to part misalignment and nonconformities during grinding operations, resulting in unknown scrap quantities and quality nonconformance, as existing systems lack effective detection mechanisms for proper part seating and stability during high-force grind operations.
Innovation Solution
A machining fixture equipped with multiple contact points and positioning switches, including part-contacting elements and biasing members, ensures secure part seating and real-time detection of proper alignment through electrical contact and display systems, preventing misloading and ensuring accurate machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional machining fixtures without detection mechanisms are used, then the device complexity is low, but part misalignment and quality nonconformance occur frequently
Solution Approach 1:
The positioning switches are installed in advance within the fixture structure to detect part loading conditions before machining begins. This preliminary detection prevents misalignment issues from developing during the machining process, ensuring proper part seating is verified upfront.
Solution Approach 2:
The detection mechanism provides real-time feedback on part loading conditions through electrical contacts and switches. This feedback system monitors whether the part is properly positioned and alerts operators to misalignment conditions, enabling immediate correction before quality nonconformance occurs.
2Measurement precision
If manual inspection with shims is used to verify part loading, then the detection mechanism is simple, but operator error and misloading are frequent
Solution Approach 1:
The manual mechanical inspection method using shims is replaced with an electrical detection system comprising positioning switches and electrical contacts. This substitution provides more precise and reliable detection of part alignment conditions, eliminating operator error while maintaining reasonable system complexity.
Solution Approach 2:
The fixture system automatically detects and reports part loading conditions without requiring manual intervention for verification. The positioning switches self-activate when the part is properly loaded, providing automatic confirmation of correct positioning without operator involvement in the detection process.
3Productivity
If no real-time detection is implemented, then the system is simple to operate, but scrap quantities increase due to undetected misalignment
Solution Approach 1:
The real-time detection system continuously monitors part positioning during the machining process and provides immediate feedback on alignment status. This enables early detection of misalignment conditions, allowing for corrective action before scrap is generated, thereby improving productivity through reduced waste.
Solution Approach 2:
The system detects part loading conditions and potential misalignment issues before they result in defective parts. By identifying problems in advance during the loading phase rather than after machining, the system prevents scrap generation and improves overall productivity.
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 effectively prevents part misalignment and nonconformities by ensuring proper seating and real-time feedback, reducing scrap quantities and improving machining precision and quality.
Implementation Method 1
multiple contact points and positioning switches, including part-contacting elements and biasing members, ensures secure part seating and real-time detection of proper alignment through electrical contact
Data Source
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AI summary
A switch housing body (41) has a base (48) and a sidewall (50) having an axis (510) and extending from the base (48) to a rim (52) and having a pair of axial slots (70). A switch cap (34) has: a cap body (80) having a top web (82); and a sidewall (84) extending from the top web (82) to a rim (86) and having a pair of holes (106). A shaft (120) passes through the pair of axial slots (70) and pair of holes (106). A spring (42) biases the cap (34) axially away from the housing (40) from a compressed condition to an extended condition. A cap electrical contact (142) and a housing electrical contact (140) have an electrically closed condition at the compressed condition.