What Is Laser Cutting? A Guide to Processes, Materials, and Design
With the advancement of Industry 4.0, laser cutting technology has become one of the core processes in fields such as sheet metal fabrication and precision component machining, thanks to its high precision, high efficiency, and non-contact processing advantages. This article provides a systematic analysis of the principles, applicable materials, and design specifications of laser cutting, while comparing it with traditional machining methods such as CNC milling to offer practical guidance.
一、Definition and Core Principles of Laser Cutting
Laser cutting is a thermal cutting process that utilizes a high-power, high-density laser beam to irradiate the surface of metal sheets, causing the material to instantly melt, vaporize, or be blown away by a high-energy gas stream, thereby achieving material separation. Unlike traditional mechanical contact cutting, laser cutting is a non-contact process. The process involves no tool wear, no mechanical compression, and no workpiece deformation, allowing the original properties and surface quality of the sheet metal to be preserved to the greatest extent possible.
When combined with automatic programming via a CNC system, the equipment can precisely cut any complex shape according to the trajectory specified in the drawings. Whether it’s straight lines, arcs, irregular holes, or openwork patterns, all can be formed in a single pass, making it a core foundational process for modern precision sheet metal fabrication.
二、Classification of Mainstream Laser Cutting Processes
Based on differences in material thickness, material type, and processing results, laser cutting is primarily