Indexing Apparatus for Automated Workpiece Positioning
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Solution Overview
Problem
Current manufacturing methods for indexing workpieces in automated machines are time-consuming and expensive, especially for large structures like aircraft parts, and are not conducive to continuous manufacturing due to the need for extensive setup and multiple probe locations or large fixtures.
Innovation Solution
An indexing apparatus and method that includes a fixture tool, an indexing feature fixed relative to the tool, a gripper to engage the feature, and a controller to locate the fixture tool relative to the operation cell, allowing for quick and accurate indexing of the automated machine relative to the workpiece without the need for extensive setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If probing methods are used to index workpiece locations, then positioning accuracy is achieved, but setup time and manufacturing cost increase significantly
Solution Approach 1:
Indexing features are pre-integrated into the fixture tool during manufacturing, eliminating the need for time-consuming probe measurements during setup. The gripper simply engages with the pre-positioned indexing feature to immediately establish accurate positioning.
Solution Approach 2:
The indexing function is extracted from the workpiece and transferred to the fixture tool through dedicated indexing features. This separates the indexing requirement from the workpiece itself, allowing rapid engagement without probing the workpiece.
2Measurement precision
If extensive probing or large fixtures are used for large structures, then positioning accuracy is maintained, but device complexity and cost increase
Solution Approach 1:
The indexing system is segmented into modular components: a standardized gripper and complementary indexing features integrated into the fixture tool. This modular approach replaces complex large-scale fixtures with simple, repeatable indexing elements.
Solution Approach 2:
The indexing features are designed to be universal across different workpieces and fixture tools. The same gripper and indexing feature design can be used throughout the manufacturing system, reducing overall device complexity while maintaining positioning accuracy for large structures.
3Measurement precision
If traditional indexing methods are used, then workpiece location is established, but continuous manufacturing is hindered by extensive setup requirements
Solution Approach 1:
The fixture tool provides its own indexing features that enable self-positioning when engaged by the gripper. This eliminates the need for external probing or complex setup procedures, allowing rapid transitions between workpieces and enabling continuous manufacturing.
Solution Approach 2:
Indexing features are pre-configured on the fixture tool, allowing the system to immediately establish accurate workpiece location upon engagement without time-consuming setup steps, thereby supporting continuous manufacturing operations.
Data Source
AI summary
An indexing apparatus includes a fixture tool, movable relative to an operation cell and an indexing feature, fixed relative to the fixture tool. The indexing apparatus also includes a gripper, configured to engage the indexing feature. The indexing apparatus further includes a controller, in communication with the gripper. The controller is configured to locate the fixture tool relative to the operation cell from a gripper location of the gripper, engaged with the indexing feature.