Probe-Based Fixture Tool Indexing for Fast Precise Positioning
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Solution Overview
Problem
Current indexing methods for workpieces in manufacturing are time-consuming and expensive, especially for large structures like aircraft components, as they require extensive setup and are not conducive to continuous manufacturing processes.
Innovation Solution
An indexing apparatus comprising a fixture tool, an indexing feature, and a controller that uses a plurality of probes to accurately and repeatably determine the location of the workpiece relative to a reference frame, allowing for quick and precise indexing of automated machines without the need for extensive setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional probing or fixture methods are used to index the workpiece, then accurate positioning is achieved, but the process becomes time-consuming and expensive due to extensive setup requirements
Solution Approach 1:
The indexing feature is pre-integrated into the fixture tool during manufacturing, eliminating the need for time-consuming on-site probing or alignment procedures. The feature is prepared in advance and simply needs to be engaged by the probes during operation.
Solution Approach 2:
Instead of physically measuring and marking multiple probe locations on the workpiece itself, the patent creates a simplified replica or representation of the indexing locations through the indexing feature, which can be quickly engaged by the probes.
2Measurement precision
If traditional indexing methods are used, then workpiece location is determined, but the process is not conducive to continuous manufacturing due to extensive setup requirements
Solution Approach 1:
The indexing feature is prepared in advance as part of the fixture tool, enabling rapid engagement and positioning without interrupting the continuous flow of manufacturing operations.
Solution Approach 2:
The indexing feature serves multiple functions: it provides precise positioning references for probes, ensures repeatable workpiece location, and facilitates quick setup for continuous manufacturing operations.
3Manufacturing precision
If probes are used to probe the workpiece at different locations, then accurate indexing is achieved, but the process becomes complex and time-consuming
Solution Approach 1:
The indexing feature is divided into multiple discrete indexing locations that can be independently engaged by probes, allowing accurate determination of workpiece position through sequential probing of these pre-defined locations.
Solution Approach 2:
The indexing feature acts as an intermediary element between the probes and the workpiece, providing fixed reference locations that simplify the probing process and reduce the complexity of determining workpiece position.
Data Source
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AI summary
An indexing apparatus (100) includes a fixture tool (102), movable relative to an operation cell (106), and an indexing feature (104), fixed relative to the fixture tool (102). The indexing apparatus also includes a plurality of probes (202), configured to engage the indexing feature (104). The indexing apparatus further includes a controller (110), in communication with the plurality of probes, wherein the controller is configured to locate the fixture tool relative to the operation cell from a plurality of probe locations of the plurality of probes, engaged with the indexing feature.