Laser Peening Nozzle Inclination for Bubble-Free Optical Paths
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Laser peening processing is hindered by air bubbles forming at the irradiation point, which interrupt the optical path and attenuate the laser beam energy, leading to inconsistent processing conditions.
Innovation Solution
A laser peening processing device and method that inclines at least one of the nozzle or the workpiece, causing air bubbles generated by liquid collision and laser irradiation to flow in a direction dependent on the injection direction of the liquid, thereby reducing stagnation and maintaining a clear optical path for the laser beam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid is injected perpendicular to the surface to be processed, then the liquid effectively covers the surface for laser peening, but air bubbles stagnate at the irradiation point and interrupt the optical path
Solution Approach 1:
The patent applies asymmetry by changing the injection direction of the liquid from perpendicular (symmetric) to oblique (asymmetric) relative to the surface normal. This asymmetric injection angle causes air bubbles to be carried away from the irradiation point by the liquid flow, preventing them from stagnating and interrupting the optical path, thereby resolving the contradiction between maintaining liquid coverage and preventing bubble accumulation.
Solution Approach 2:
The patent employs dynamics by creating a flowing liquid environment that dynamically carries air bubbles away from the processing area. Instead of static liquid coverage, the continuous oblique injection creates fluid motion that actively removes harmful air bubbles from the optical path, maintaining processing consistency while eliminating bubble-related attenuation.
2Stability of the object's composition
If air bubbles are removed from the liquid supply piping, then liquid flow stability is improved, but air bubbles still generate at the laser irradiation point
Solution Approach 1:
The patent converts the harmful effect of air bubbles into a beneficial outcome by using the oblique liquid injection to actively sweep bubbles away from the irradiation point. The same bubble generation mechanism that causes problems is harnessed through the asymmetric flow pattern to clear the optical path, transforming the harmful bubble presence into a self-cleaning effect that maintains liquid flow stability and processing quality.
3Manufacturing precision
If laser beam energy is maintained at set levels, then processing precision is achieved, but air bubbles cause energy attenuation and inconsistent results
Solution Approach 1:
The patent applies preliminary action by establishing an oblique liquid injection flow pattern before laser irradiation begins. This pre-established asymmetric flow creates a bubble-removal mechanism that operates continuously during processing, ensuring that air bubbles are carried away before they can accumulate and attenuate the laser beam energy, thereby maintaining consistent energy delivery and manufacturing precision throughout the operation.
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 approach effectively reduces the number of stagnation points and air bubbles near the processing area, ensuring a consistent and sufficient energy delivery of the laser beam, thereby improving the quality and reliability of the laser peening process.
Implementation Method 1
laser peening processing is performed by condensing and irradiating a laser beam on a surface to be processed of a workpiece in a state where the surface to be processed is covered with liquid
Implementation Method 2
plasma generated by irradiation of the laser beam can be sealed in the liquid
Implementation Method 3
a pressure of a shock wave is applied to the surface to be processed
Implementation Method 4
Air bubbles arising by at least one of collision between the liquid and the surface to be processed and shock by irradiation of the laser light on the surface to be processed are flowed in a direction depending on an inclined direction of the surface to the injection direction of the liquid
Data Source
AI summary
According to one implementation, a laser peening processing device includes a laser peening processing device includes a laser oscillator, a nozzle and an inclining structure. The laser oscillator emits laser light. The nozzle condenses and irradiates the laser light toward a surface to be processed of a workpiece, with injecting liquid toward the surface to be processed. The inclining structure inclines at least one of the nozzle and the workpiece to make an injection direction of the liquid be different from a normal direction of the surface to be processed. The air bubbles arising by at least one of collision between the liquid and the surface to be processed and shock by irradiation of the laser light on the surface to be processed are flowed in a direction depending on an inclined direction of the surface to the injection direction of the liquid.