Laser Head Control Using Transmission-Inhibition Liquid Shielding
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Solution Overview
Problem
Laser processing devices face challenges in preventing laser beam leakage due to reflection from the cutting table, leading to a complex device configuration and imperfect light shielding over time, with existing solutions not effectively addressing light shielding during water-based cooling or dust prevention methods.
Innovation Solution
A laser processing device and method utilizing a container filled with a transmission inhibition liquid, detected by sensors to control laser emission, ensuring the laser beam is absorbed or scattered before it can leak outside, thereby simplifying the device configuration and maintaining effective light shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cutting table-side light shielding member is installed below the workpiece to prevent laser beam leakage, then the laser beam leakage is prevented, but the device configuration becomes complicated
Solution Approach 1:
The patent introduces a light shielding liquid as an intermediary substance between the workpiece and the cutting table. This liquid absorbs and blocks the laser beam that penetrates through the workpiece, preventing it from reflecting off the cutting table and leaking outward. The liquid serves as a mediator that solves the light shielding problem without requiring complex mechanical shielding structures below the workpiece.
Solution Approach 2:
The patent utilizes a hydraulic or pneumatic system to supply and control the light shielding liquid. A liquid supply unit delivers the light shielding liquid to the processing area through fluid delivery mechanisms, allowing dynamic control of the light shielding effect without mechanical moving parts in the shielding structure itself.
2Reliability
If a cutting table-side light shielding member is used to block laser beam reflection, then laser beam leakage is prevented initially, but the light shielding becomes imperfect over time as the member is scraped off by the laser beam
Solution Approach 1:
The light shielding liquid has self-replenishing capabilities. When the liquid is consumed or depleted in the processing area, the liquid supply unit automatically detects this and replenishes the liquid without requiring manual intervention or system shutdown. This ensures continuous light shielding effectiveness throughout the operation.
Solution Approach 2:
The patent changes the state of the light shielding medium from a solid mechanical structure to a liquid state. This parameter change allows the shielding medium to flow and replenish itself, preventing the degradation issue that affects solid shielding members that are physically scraped by the laser beam.
3Temperature
If water is used in the laser processing device for cooling or dust prevention, then cooling or dust control is achieved, but light shielding of the laser beam is not effectively provided
Solution Approach 1:
The light shielding liquid performs multiple functions simultaneously: it provides light shielding to block laser beam leakage, cools the workpiece through fluid contact, and suppresses dust particles. This multi-functional liquid eliminates the need for separate systems for each function and resolves the contradiction between cooling and light shielding.
Solution Approach 2:
The light shielding liquid can be formulated as a composite material containing light-absorbing particles or additives suspended in a cooling fluid base. This composite structure provides both optical shielding properties and thermal cooling properties in a single substance, enabling simultaneous achievement of light shielding and cooling functions.
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
The solution effectively prevents laser beam leakage with a simple device configuration, reducing the complexity of light shielding and ensuring stable processing by using a transmission inhibition liquid that absorbs or scatters the laser beam, even when used with fiber lasers.
Implementation Method 1
a transmission inhibition liquid inhibiting transmission of the laser beam
Implementation Method 2
a transmission inhibition liquid inhibiting transmission of the laser beam
Data Source
AI summary
A container can store a transmission inhibition liquid that inhibits transmission of a laser beam. A laser head emits a laser beam. A transmittance detection sensor detects transmittance of a transmission inhibition liquid stored in a container. A liquid level sensor is fixed to the laser head, and detects a relative distance between the liquid level sensor and a liquid level of the transmission inhibition liquid. A controller controls emission of the laser beam to a workpiece by the laser head based on detection results of the transmittance detection sensor and the liquid level sensor.