The Invisible Opponent of Laser Processing: A Complete Guide To Thermal Effect Control

This article provides a comprehensive technical guide on managing and minimizing thermal effects in laser processing. It explains core concepts such as the Heat Affected Zone (HAZ), thermal relaxation time, and absorption rates. By identifying heat sources across three levels—source-level (wavelength mismatch), process-level (pulse accumulation), and path-level (scanning patterns)—it offers systematic solutions including optimizing optical configurations, selecting "colder" light sources (e.g., UV or ultrashort pulse lasers), and adjusting process logic through multi-pass strategies and auxiliary gases. Detailed parameter tables for various materials and a troubleshooting guide are included to help engineers achieve high-precision results with minimal thermal damage.

Influence of Wire Feeding Angle on Droplet Transition Behavior And Process Stability in Wire-Laser Additive Manufacturing

This study investigate the critical influence of wire feeding angle on the stability of droplet transition and process consistency in wire-laser additive manufacturing (WLAM). By employing a comprehensive fluid dynamics model, researchers analyzed the evolution of liquid bridge morphology and molten pool behavior across a range of wire feeding angles (25° to 65°). The findings reveal that increasing the wire feeding angle triggers a transition from a stable state, dominated by surface tension (at 25° and 45°), to an unstable state governed by inertia and gravity (at 65°). This instability is primarily caused by a mismatch between the melting rate and the wire feeding rate due to weakened heat transfer at larger angles. The study provides a theoretical framework for optimizing process parameters to ensure high fatigue performance and forming quality in complex geometric components for aerospace and automotive industries.

Why is Laser Tube Cutting Becoming the New Industry Hotspot? A Deep Dive into Its Driving Forces and Advantages

CO₂ Laser vs CNC Router for Wood Processing

What Are the Features and Applications of a Single Table Laser Cutting Machine?

Why More Glass Manufacturers Are Switching to Laser Drilling

Fusiform Attention Network for Online Penetration Monitoring in Laser Welding

This research from Shanghai Jiao Tong University proposes a novel Fusiform Attention Network (FANet) for the real-time visual monitoring of penetration status in laser welding. By integrating Ternary Multi-head Linear Attention (TMLA), the model effectively aligns its receptive field with the physical geometry of the molten pool, balancing local detail extraction (spatter, plasma) with long-range morphological perception (molten pool length). The network achieves a high recognition accuracy of 93.24% with an end-to-end latency of only 5.41ms, meeting the stringent requirements for high-speed online industrial monitoring (100 FPS) and providing a robust solution for closed-loop quality control in automotive, aerospace, and shipbuilding industries.

Unveiling The Microstructural Mechanism of Tuning Optical Properties of Densified Silica Glass Via High Pressure And Ultrafast Laser Excitation

This research systematically investigates the distinct microstructural evolution mechanisms of densified silica glass under high-pressure high-temperature (HPHT) treatment and femtosecond laser direct writing (FLDW). While both techniques induce permanent densification and refractive index enhancement, they follow divergent structural reorganization paths. FLDW uniquely drives the glass network into a non-equilibrium state characterized by a high fictive temperature (1600–2000 K) and the formation of edge-sharing SiO4 tetrahedra (binary rings), leading to significant non-bridging oxygen (NBO) defects and unique photoluminescence responses. In contrast, HPHT densification primarily relies on the deformation of rigid unit modes without generating such localized bond-breaking defects. Supported by machine learning molecular dynamics simulations, these findings provide critical theoretical insights for the precision design of advanced photonic devices and integrated optoelectronic systems.