Laser Peening Nozzle Layout for Complex-Shaped Workpieces
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Solution Overview
Problem
Existing laser peening technologies face challenges in effectively processing complex-shaped workpieces due to interference issues between the nozzle and the workpiece, leading to limitations in applying compression stress uniformly and efficiently.
Innovation Solution
A laser peening processing device with a nozzle design that includes a cylindrical casing, a condenser lens, and a pipe forming a flow path for liquid, allowing the laser beam to propagate through the liquid and converge at a focal point on the workpiece, while avoiding interference with the workpiece's shape, enabling precise and localized processing even on intricate surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional nozzle design is used for laser peening processing, then the processing can be performed on simple-shaped workpieces, but interference occurs between the nozzle and complex-shaped workpieces, preventing effective processing
Solution Approach 1:
The nozzle is divided into separate functional components: a liquid injection portion and an optical portion. The liquid injection portion includes a nozzle body with liquid injection holes, while the optical portion includes a lens holder with a lens. This segmentation allows each component to be optimized independently, enabling the nozzle to adapt to complex-shaped workpieces without interference while maintaining effective laser peening processing capability.
2Manufacturing precision
If the laser beam is concentrated to a focal point for effective processing, then the processing precision is improved, but the nozzle structure becomes more complex requiring precise positioning of the focal point
Solution Approach 1:
The nozzle separates liquid injection functions (nozzle body with injection holes) from optical focusing functions (lens holder with lens). This segmentation simplifies the overall structure by allowing each component to perform its specific function without requiring complex integration, while still achieving precise focal point positioning for effective laser peening processing.
Solution Approach 2:
The lens acts as an intermediary element that focuses the laser beam to a precise focal point on the workpiece surface. By introducing this optical intermediary, the system achieves high processing precision without requiring complex mechanical positioning mechanisms, as the lens naturally converges the beam to the desired focal point.
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 solution allows for effective reduction of fretting damage, wear, and fatigue in components with complex geometries by ensuring consistent application of compression stress, enhancing fatigue strength and corrosion resistance.
Implementation Method 1
The laser oscillator oscillates a laser beam. The nozzle includes a lens, a cylindrical casing, and a pipe. The lens concentrates the laser beam so that a focal point of the laser beam is formed at a processing position of the laser peening processing.
Implementation Method 2
When the surface to be processed of a workpiece covered with liquid is concentratedly irradiated with a laser beam, it is possible to confine the plasma generated by the irradiation of the laser beam within the liquid.
Implementation Method 3
Consequently, the pressure of a shock wave is applied to the surface to be processed.
Implementation Method 4
The nozzle injects liquid to a workpiece for laser peening processing, and causes the laser beam to be incident on the liquid to irradiate the workpiece with the laser beam which propagates through the liquid.
Data Source
AI summary
A laser peening processing device includes a laser oscillator configured to oscillate a laser beam; and a nozzle configured to inject liquid to a workpiece for laser peening processing, and to cause the laser beam to be incident on the liquid to irradiate the workpiece with the laser beam which propagates through the liquid. The nozzle includes a lens configured to concentrate the laser beam so that a focal point of the laser beam is formed at a processing position of the laser peening processing, a cylindrical casing configured to protect the laser beam before the laser beam is incident on the liquid, and a pipe disposed in the casing and configured to form a flow path for the liquid.