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Article
Analysis of thermal damage formation and extension mechanism in CFRP short pulse laser cutting based on an inhomogeneous mesoscopic ablation model
One of the effective ways to achieve drilling of Carbon fiber reinforced polymer (CFRP) materials is to use short pulse lasers. However, the existing cutting thermal damage, such as the heat-affected zone (HAZ...
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Article
Depth Accurate Prediction and Kerf Quality Improvement of CFRP Through-Hole Laser Cutting via Acoustic Emission Nondestructive Monitoring Technology
Acoustic emission (AE) technology is an effective method for monitoring the quality of carbon fiber reinforced plastic (CFRP) laser cutting. It is a challenge to decipher the formation mechanism because of the...
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Article
WeldNet: A voxel-based deep learning network for point cloud annular weld seam detection
Weld seam detection is an important part of automated welding. At present, few studies have been conducted on annular weld seams, and a lot of defects exist in the point cloud model of the tube sheet obtained ...
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Article
Ultrafast laser-chemical modification hybrid fabrication of hydrostatic bearings with a superhydrophobicity solid-liquid interface
Oil film vortex severely reduces the stability of hydrostatic bearings. A solid-liquid interface with drag and slip properties can weaken the oil film vortex of the bearing. Here, a combined picosecond laser a...
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Article
Lattice Boltzmann study on the effects of surface nanostructure on wettability with application in laser scanning fabrication of superhydrophobic surfaces
Nanostructured surfaces with dimensions on a scale of a few millimeters exhibit remarkable hydrophobicity. The geometry of these nanostructures considerably affects their wettability. However, determining the ...
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Article
Open AccessRevealing the interaction mechanism of pulsed laser processing with the application of acoustic emission
The mechanisms of interaction between pulsed laser and materials are complex and indistinct, severely influencing the stability and quality of laser processing. This paper proposes an intelligent method based ...
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Article
A novel monitoring method of nanosecond laser scribing float glass with acoustic emission
The interaction between nanosecond laser and glass is complicated, and defects such as micro-cracks and fractures are prone to be generated during laser scribing. Acoustic emission (AE) technique is applied in...
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Article
Stiffness Improvement of Aerostatic Bearing by Separating-Pad-Based Passive Compensation
With the development of ultra-precision machining technology, the aerostatic bearings with high stiffness are needed urgently. This paper proposes a new aerostatic bearing structure with split design, which ca...
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Article
Study on HAZ of nanosecond UV laser cutting multilayer ferrite ceramic composite flakes for electromagnetic shielding
Ferrite composites composed of brittle ferrite ceramic, soft polymers and rubber pose a challenge for low-damage cutting. In this paper, nanosecond UV (Ultra Violet) laser was used to cut the ferrite composite...
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Article
Improving the prediction accuracy of thermal finite element analysis for laser welding through an automated optimization method
This paper proposed an automated optimization method to improve the prediction accuracy of thermal finite element analysis for laser welding. The method used particle swarm optimization (PSO) to find the optim...
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Article
Laser cutting of thermoplastic film: Mechanism and processing technology
The mechanism of ultraviolet (UV) nanosecond laser cutting of thermoplastic films and the influence of process parameters on process quality are systematically discussed. The photothermal effect plays a domina...
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Article
Dimethicone-assisted laser cutting of CFRP hole
When cutting carbon fiber reinforced polymer (CFRP) plate with UV nanosecond laser, the surface heat-affected zone (HAZ) such as fiber exposure and carbonization will occur, which affects the surface morpholog...
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Article
Effect of collapse and hump on thermomechanical behavior in high-power laser welding of 16-mm marine steel EH40
This paper concerns high-power laser welding of thick plates for the ship industry. Thermomechanical behavior during laser welding of 16-mm marine steel EH40 using 25-kW laser power was investigated by a 3D fi...
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Article
Fusion interface stress and its potential effect on microcrack in 10-kW level laser welding
Fusion interface stress is sharply produced by heating–cooling cycle in 10-kW level laser welding of stainless steel 316L with 10 mm thick, and it has a direct contribution to microcrack formation. This topics...
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Article
Effect of Welding Parameters on the Geometry, Microstructure, and Corrosion Resistance of Laser Welded 16 mm EH40 Joints
Considering laser power, defocus length, and welding speed, a Taguchi experiment (25 groups) was designed to investigate the 30-kW-laser-welding processing of 16-mm-thick marine steel EH40. The fusion zone (FZ...
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Article
Process and mechanism of cutting thermoplastic polyurethane (TPU) film by nanosecond ultraviolet laser
Thermoplastic polyurethane (TPU) films have been widely used as substrates in the rapidly develo** fields of flexible electronics and soft actuators. Patterned high-quality cutting is of great significance t...
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Article
The development of tube-to-tubesheet welding from automation to digitization
Tube-to-tubesheet welding is widely used in manufacturing of heat exchangers, steam turbines, condensers, boilers, etc. It has evolved from manual arc welding, automatic welding to digital welding. In the futu...
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Article
Analysis and comparison of laser cutting performance of solar float glass with different scanning modes
Cutting quality and efficiency have always been important indicators of glass laser cutting. Laser scanning modes have two kinds, namely, the spiral and concentric circle scanning modes. These modes can achiev...
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Article
Dimethicone-aided laser cutting of solar rolled glass
Solar rolled glass, with one micro-structure surface and another roughness surface, can cause diffuse refraction of the focused laser spot, and this phenomenon restricts the application of laser manufacturing....
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Article
Magnetic-Field-Induced Partial-to-Full Penetration Evolution and Its Mechanism During Laser Welding
The geometry and tensile strength of magnetic-field-assisted laser-welded Ti-6Al-4V joints have been studied. Due to the effects of the magnetic field on the melt flow behavior during welding, the weld penetra...
