Laser Processing Head Self-Diagnosis via Optical Axis Detection
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Solution Overview
Problem
Existing laser processing heads lack a simple and effective method for diagnosing the state of their components, which can lead to processing defects and inefficiencies due to the complex configuration of optical components and rotation mechanisms.
Innovation Solution
A laser processing head configuration that includes light receiving parts to detect the laser beam's output state, allowing for the adjustment of the light receiving part's position based on the shift amount of the optical axis, and additional components to diagnose the state of protection members and rotation mechanisms, enabling the detection of abnormalities and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light receiving parts are added to diagnose component state, then reliability is improved, but device complexity increases
Solution Approach 1:
The light receiving part serves multiple functions: it detects the laser beam position to diagnose parallel plate rotation state, monitors beam transmission to detect protection member contamination, and provides feedback for maintaining processing quality. This multi-functionality approach adds diagnostic capability without proportionally increasing device complexity.
Solution Approach 2:
The light receiving part provides real-time feedback on the laser beam position and transmission state, enabling the system to automatically detect component abnormalities such as parallel plate misalignment or protection member contamination, and trigger appropriate maintenance actions to ensure reliable operation.
2Measurement precision
If light receiving part position is adjusted according to optical axis shift, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The light receiving part is pre-positioned at a location that accounts for the expected optical axis shift when parallel plates are rotated. This preliminary positioning ensures that the light receiving part remains in the correct detection position throughout the operating range, maintaining measurement precision without requiring real-time adjustment mechanisms.
3Ease of manufacture
If simple configuration is used for compact and light-weight head, then ease of manufacture is improved, but difficulty of detecting and measuring increases
Solution Approach 1:
The laser processing head performs self-diagnosis using the light receiving part to monitor its own component states, such as detecting parallel plate rotation position and protection member contamination. This self-service approach enables diagnostic capability in a compact design without requiring external complex measurement systems.
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
This configuration allows for accurate recognition of the laser beam output state and detection of component abnormalities, preventing processing defects and ensuring the reliability of the laser processing head.
Implementation Method 1
a light receiving part that receives a laser beam reflected by an upper surface of a bottom parallel plate of two parallel plates
Implementation Method 2
a first parallel plate that shifts an optical axis of a laser beam from a first optical axis to a second optical axis
Data Source
AI summary
A laser processing head includes parallel plate (17) that shifts an optical axis of a laser beam to be emitted from a top to a bottom of body case (6) from a first optical axis to a second optical axis, parallel plate (19) that shift the optical axis of the laser beam from the second optical axis to a third optical axis, and body case (6) that accommodates holders (7 and 18) that respectively hold parallel plates (17 and 19). The laser processing head further includes a rotation mechanism that rotates holders (7 and 18) around a first rotary axis. Opening (7a) that a laser beam reflected by an incident surface of second parallel plate (19) passes through is formed in holder (7), and light receiving part (6a) that receives the laser beam having passed through opening (7a) is disposed in body case (6).