Fastener Retightening Using Stored Coordinates on a Movable Carriage
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Solution Overview
Problem
Existing fastening systems require workpieces to be fixed at a precise position on a table for retightening, increasing the number of working processes and inefficiency.
Innovation Solution
A fastening system with a movable carriage, coordinate detection unit, and retightening device that detects and stores the position of temporarily tightened fasteners, allowing for automatic retightening regardless of the workpiece's position on the table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If workpiece is fixed at a fixed position on the table for retightening, then positioning accuracy is improved, but the number of working processes increases
Solution Approach 1:
The patent replaces the mechanical positioning system with an optical detection system. Instead of using fixed mechanical positions and physical alignment, the system uses a camera to detect the workpiece and fastener positions, converts them to coordinate information, and uses visual feedback to guide the retightening operation. This substitution eliminates the need for complex mechanical positioning while maintaining accuracy.
Solution Approach 2:
The patent introduces a coordinate information intermediary between the detection phase and the retightening phase. The coordinate detection unit captures position data, converts it to coordinate information relative to the workpiece, and transmits this intermediary data to the retightening device. This intermediary allows the system to bridge different reference frames and enables automatic retightening without fixed positioning.
2Measurement precision
If workpiece is fixed at a fixed position on the table for retightening, then positioning accuracy is improved, but productivity is reduced
Solution Approach 1:
The patent replaces the mechanical positioning system with an optical detection system. Instead of using fixed mechanical positions and physical alignment, the system uses a camera to detect the workpiece and fastener positions, converts them to coordinate information, and uses visual feedback to guide the retightening operation. This substitution eliminates the need for complex mechanical positioning while maintaining accuracy.
Solution Approach 2:
The patent performs preliminary coordinate detection and conversion before the retightening operation. The coordinate detection unit captures position data during the initial tightening phase, converts it to coordinate information relative to the workpiece, and stores this information for later use. This preliminary action enables the retightening device to automatically locate the fastener without requiring workpiece repositioning or additional detection steps.
3Ease of operation
If coordinate detection and storage is implemented for automatic retightening, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent designs the coordinate detection unit to serve multiple functions: it detects both the workpiece position and the fastener position, converts both to coordinate information, and provides this data to the control unit. The control unit then uses this coordinate information for both guidance and control of the retightening operation. This multi-functionality reduces the need for separate detection systems for different components.
Solution Approach 2:
The patent merges the detection, coordinate conversion, and control functions into an integrated system. The coordinate detection unit and control unit work as a unified system where detection data is immediately converted to coordinates and used for control. This merging eliminates the need for separate positioning mechanisms and reduces overall system complexity while maintaining automation capability.
Data Source
AI summary
A fastening system for fastening a fastener to a workpiece, includes a movable carriage on which the workpiece is placed, a coordinate detection unit configured to detect a position of the fastener temporarily tightened onto the workpiece as coordinates in a coordinate system of the movable carriage, a storage device configured to store the coordinates detected by the coordinate detection unit, and a retightening device configured to determine a position of the fastener based on the coordinates stored in the storage device and retighten the fastener that is at the determined position.