Lead Wire Cutting Device Blade Distortion Detection
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Solution Overview
Problem
In lead wire cutting devices, stress distortion in the clinch means can occur due to cut end portions of lead wires getting caught or stacked, making it difficult to determine the quality of insertion and fixation of electronic components, even when the lead is not properly inserted into the circuit board.
Innovation Solution
A board work machine equipped with a lead wire cutting device that includes a first and second blade portion, a distortion sensor to detect blade distortion, and a control device to assess operation failure based on sensor values, ensuring accurate determination of lead wire cutting device performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the lead wire cutting device operates to cut the lead wire, then the lead wire is separated from the electronic component, but the cut end portion may be caught in the gap of the movable blade or stacked in the clinch means, generating stress distortion
Solution Approach 1:
The system performs preliminary action by acquiring the distortion value from the distortion sensor before inserting the lead wire into the board. This allows the control device to determine whether the lead wire cutting device is operating normally (i.e., whether cut ends are properly disposed) before the actual insertion process begins, preventing false quality assessments
Solution Approach 2:
The distortion sensor provides real-time feedback on the stress distortion in the clinch means. The control device uses this feedback to determine the operational status of the lead wire cutting device, creating a closed-loop system that can identify and respond to abnormal conditions such as cut end portions being caught or stacked
2Measurement precision
If stress distortion is generated in the clinch means due to caught or stacked cut end portions, then the distortion sensor detects abnormal stress, but it becomes difficult to determine the good or bad quality of insertion and fixation
Solution Approach 1:
The system performs preliminary action by acquiring the distortion value from the distortion sensor before inserting the lead wire into the board. This allows the control device to determine whether the lead wire cutting device is operating normally (i.e., whether cut ends are properly disposed) before the actual insertion process begins, preventing false quality assessments
Solution Approach 2:
The system extracts the distortion measurement function from the quality assessment process. By using the distortion sensor to specifically monitor the operational status of the lead wire cutting device separately, the system can distinguish between stress distortion caused by cutting device abnormalities and stress distortion that would indicate insertion quality issues
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the determination of operation failures in the lead wire cutting device, ensuring proper insertion and fixation of electronic components by using distortion sensor values to differentiate between normal and abnormal operations.
Implementation Method 1
a distortion sensor configured to detect distortion of at least one of the first blade portion or the second blade portion
Data Source
AI summary
A board work machine includes a board holding portion configured to hold a board, a work head configured to hold a lead component having a lead wire and insert the lead wire into a through-hole formed in the board, a lead wire cutting device configured to cut the lead wire inserted into the board by relatively reciprocally moving a first blade portion and a second blade portion, a distortion sensor configured to detect distortion of at least one of the first blade portion or the second blade portion, and a control device configured to drive the lead wire cutting device to acquire a value from the distortion sensor when the lead wire is not inserted into the board.