The metal laser marking machine uses a laser beam to permanently mark the surface of various substances. The effect of marking is to expose the deep material through the evaporation of the surface material, or to "engrave" traces through the chemical and physical changes of the surface material through light energy, or to burn off part of the material through light energy to reveal the required etching. Graphics, text. Features of metal laser marking:
(1) Most metal or non-metal materials can be processed.
(2) The laser is processed by a non-mechanical "tool", which does not produce mechanical extrusion or mechanical stress on the material, no "tool" wear, non-toxic, and rarely causes environmental pollution.
(3) The laser beam is very thin, so that the consumption of the processed material is very small.
(4) During processing, X-rays will not be generated like processing methods such as electron beam bombardment, and will not be disturbed by electric and magnetic fields.
(5) The operation is simple, the use of microcomputer numerical control technology can realize automatic processing, can be used for high-speed and high-efficiency processing of parts on the production line, and can be used as part of a flexible processing system.
(6) Fine micromachining can be performed using a precision table.
(7) Using a microscope system or a camera system, the condition of the processed surface can be observed or monitored.
(8) It can pass through light-transmitting materials (such as quartz and glass) to process its internal parts.
(9) Prisms and mirror systems (for Nd:YAG lasers, optical fiber guide systems can also be used) can be used to focus the beam on the inner surface or inclined surface of the workpiece for processing.
(10) Can mark barcodes, numbers, characters, patterns and other signs.
(11) The line width of these marks can be as small as 12 μm and the line depth can be less than 10 μm, so it can mark the zero surface of the size of "millimeter level".
When marking general metal materials, lines with a depth of several micrometers or more (the width can be several micrometers to tens of micrometers) are ablated, so that the color and reflectivity of the lines are different from the original, resulting in a contrast effect for the human eye, so that people can be sensitive to these lines (and the shape codes, numbers, patterns, trademarks, etc. formed by the lines). For glass, these ablated lines have a "smothering" effect; for plastics, due to photochemical reaction and ablation, there is visual contrast and dullness effect. If the surface of the material is coated with a special colored substance for marking, the colored substance will be fixed (high temperature ablation with the material) on the line to make it colored.
