Cut-and-clinch apparatus positional accuracy control
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Solution Overview
Problem
Existing board work machines with movable elements that approach and separate from each other face challenges in achieving precise positional accuracy due to deviations in the positions of these elements from their target positions, which affects the accuracy of operations like cutting and clinching of lead wires.
Innovation Solution
The implementation of a cut-and-clinch apparatus that uses image data to accurately acquire the actual positions of movable elements, allowing for correction of deviations and improved positional accuracy by controlling the movement of these elements based on acquired deviation amounts, thereby aligning them with target positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pair of movable elements are controlled to approach and separate from each other, then the operations like cutting and clinching can be performed, but the positional accuracy of the movable elements deviates from target positions
Solution Approach 1:
The patent implements a feedback mechanism where image data is captured to detect the actual positions of the movable elements, deviation amounts are calculated by comparing actual positions with target positions, and control instructions are generated to correct these deviations. This closed-loop feedback system continuously monitors and adjusts the positions of the movable elements to maintain manufacturing precision.
Solution Approach 2:
The patent replaces purely mechanical position control with an optical measurement system. Image data is used to detect the actual positions of the movable elements, substituting mechanical feedback mechanisms with optical field-based detection to achieve more accurate position sensing and correction.
2Manufacturing precision
If image data is used to acquire actual positions of movable elements, then positional accuracy is improved, but device complexity increases
Solution Approach 1:
The patent introduces image data as an intermediary to bridge the gap between mechanical position control and accuracy measurement. The imaging system serves as a mediator that captures position information, which is then processed to generate correction instructions, simplifying the overall control architecture while improving precision.
Solution Approach 2:
The patent creates a digital copy of the physical system's state through image data. By capturing images of the movable elements and their positions, the system generates a virtual representation that can be analyzed and used to correct physical positions, enabling precise control without complex mechanical feedback mechanisms.
Data Source
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AI summary
The positional accuracy of a pair of movable elements that are made to approach each other and separate from each other is improved by one driving source. The relationships between setting pitches, pitch deviation amounts, axis deviation angles, and central point deviation amounts of the pair of movable elements are stored as a deviation table. On the basis of the deviation table and a target pitch determined by the spacing between lead wires of a lead component to be inserted into a board, a pitch deviation amount, an axis deviation amount, and a central point deviation amount for the target pitch are acquired by an interpolation method (S25). Control instruction values to an x-axis motor, a y-axis motor, a θ motor, and a P motor are created taking into consideration correction values corresponding to these deviation amounts, and control is performed accordingly (S26 to S28). As a result, it is possible to accurately control the positions of the pair of movable elements, and it is possible to perform control such that lead wire insertion holes reach positions facing through-holes provided in the board. Therefore, the lead wires of the lead component are favorably inserted into the lead wire insertion holes, and it is possible to favorably perform cutting and clinching.