Lead Position Correction Device with Interchangeable Forming Dies
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Solution Overview
Problem
Existing lead correction methods are inefficient as they require repeated correction cycles and cannot accurately maintain terminal pin positions within allowable ranges due to elastic deformation, leading to potential damage and inefficiency in component mounting.
Innovation Solution
A lead correction method and device that utilize a correction unit with forming dies and a drive unit, allowing for precise correction of lead positions by repeating the correction cycle up to a set number of allowable times, and enabling easy replacement of correction units to accommodate different lead shapes, ensuring accurate positioning within tolerance limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the correction operation is performed on all electronic components including those that do not need correction, then the terminal pin position correction is ensured, but the correction efficiency is reduced due to repeated correction cycles
Solution Approach 1:
The patent applies preliminary action by measuring the terminal pin position before the correction operation. The correction unit is controlled to perform correction only when the measured position is outside the allowable range, avoiding unnecessary correction cycles and improving efficiency while maintaining precision.
2Manufacturing precision
If the correction operation is repeated multiple times to achieve accurate positioning, then the terminal pin position accuracy is improved, but the risk of lead damage increases
Solution Approach 1:
The patent performs preliminary measurement of the terminal pin position before correction. By determining the exact deviation amount from the allowable range, the correction unit applies only the necessary correction force, achieving accurate positioning while minimizing lead damage risk through a single controlled correction operation.
3Device complexity
If a fixed correction unit is used for all lead shapes, then the device complexity is reduced, but the adaptability to different lead shapes is limited
Solution Approach 1:
The patent implements a replaceable correction unit design where different correction units can be exchanged based on the specific lead shape requirements. This dynamic configuration allows the system to adapt to various lead shapes without increasing the overall device complexity, as only the correction unit module needs to be changed.
Data Source
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AI summary
A lead correction method includes an imaging step (Step 104) of imaging leads P1 and P2 of a component P with leads mounted on a printed circuit board B; a determination step (Step 106) of determining whether or not a position of the lead imaged in the imaging step is within an allowable tolerance; and a correction step (Step 110) of correcting the position of the lead when it is determined that the position is outside the allowable tolerance in the determination step. The imaging step and the determination step are performed again after the correction operation in the correction step, and when the lead position is not corrected to be within the allowable tolerance, the imaging step, the determination step, and the correction step are repeated up to a number of allowable times of correction operation A1 which is maximally set in advance.