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Six major process and application developments in the field of laser micromachining

Six major process and application developments in the field of laser micromachining

With the development of the global manufacturing industry towards refinement, intelligence, and customization, lasers have been widely used in industrial manufacturing, biomedical, military and other fields due to its good monochromaticity, directionality, brightness and other characteristics. The global industrial chain. As the division of labor in the laser industry continues to mature, the application of lasers in the field of micromachining has become more and more extensive. In daily life, laser micromachining technology can be seen everywhere. Electronic product marking, electrical appliance shell marking, food and drug production date marking, consumer electronics micromachining, cutting and welding of mobile phone metal shells all have laser micromachining technology. In addition, Laser processing is also used in PCB/FPCB board cutting and sub-boarding, ceramic punching and scribing, glass, sapphire, wafer cutting and micro-drilling.

Laser processing is an industrial application of laser technology. It focuses a certain power of laser on the processed object so that the laser interacts with the object to heat, melt or vaporize the processed material to achieve the processing purpose. At present, micro-processing applications in the laser manufacturing industry mainly include laser cutting, laser marking, laser welding, laser engraving, surface treatment, and laser 3D printing. Here are six major processes in the field of laser micromachining.

①Laser Cutting

Principle: Use a focused high-power density laser beam to irradiate the workpiece to quickly melt, vaporize, ablate or reach the ignition point of the irradiated material. At the same time, the molten material is blown away by the high-speed airflow coaxial with the beam to cut the workpiece.

Features: fast cutting speed, smooth and beautiful surface, one-time processing, small workpiece deformation, no tool wear, low cleaning pollution, can process metal, non-metal and non-metal composite materials, leather, wood, fiber, etc., suitable for car body thickness Fine processing of sealed devices such as boards, auto parts, lithium batteries, pacemakers, sealed relays, and various devices that do not allow welding pollution and deformation.

②Laser Marking

Principle: Use high-energy-density laser to locally irradiate the workpiece to vaporize the surface material or cause a chemical reaction of color change, thereby leaving a permanent mark.

Features: It is non-contact processing, can be marked on any special-shaped surface, the workpiece will not be deformed and internal stress, high processing accuracy, fast processing, clean and environmentally friendly, low cost, suitable for metal, plastic, glass, ceramics, wood , Leather and other materials.

③Laser Welding

Principle: Use high-energy-density laser beam radiation to heat the surface of the workpiece, and the surface heat diffuses into the interior through heat conduction. By controlling the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool.

Features: Weldability is reduced, not affected by magnetic fields, small space restrictions, no electrode pollution, suitable for automatic high-speed welding, can weld metals of different properties, can work in enclosed spaces, suitable for circular saw blades, acrylic, Spring gaskets, copper plates for electronic parts, some metal mesh plates, iron plates, steel plates, phosphor bronze, bakelite, thin aluminum alloys, quartz glass, silicon rubber, alumina ceramic sheets below 1mm, titanium alloys used in the aerospace industry, etc. Wait.

④Laser Engraving

Principle: Laser irradiates the surface of the material, and the material instantly melts or vaporizes after absorbing energy, forming a scribe line.

Features: automatic number skipping, small heat-affected area, fine lines, cleaning and abrasion resistance, environmental protection and energy saving, saving materials, can be used for wood products, plexiglass, metal plate, glass, stone, crystal, paper, two-color board, alumina , Leather, resin and other materials etching.

⑤Surface Treatment

Principle: Use laser to heat the surface of metal materials to achieve surface heat treatment.

Features: fast processing speed, small component deformation, precise processing, automatic quenching treatment effect, suitable for heat treatment of auto parts such as cylinder liners, crankshafts, piston rings, commutators, gears, etc., at the same time in aerospace, machine tool industries, etc. There are also extensive applications in the field.

⑥Laser 3D Printing

Principle: Use a powder spreading roller to spread a layer of powder on the surface of the workpiece. The laser 3d printing beam scans the powder layer according to the contour section of the powder layer, so that the powder is melted and sintered to realize the bonding of the workpiece.

Features: simple processing technology, wide range of materials that can be processed, high processing accuracy, no need for supporting structures, material utilization

High rate, combined with computer numerical control technology and flexible manufacturing technology, can be used for mold and model manufacturing.

The Development Of Laser Micromachining Applications

At present, the domestic fiber laser market share is higher than that of solid-state lasers. The main reason is that fiber lasers are mainly used for high-power macro-processing, and the market demand is consistent with the development stage of domestic manufacturing; solid-state lasers are mainly used for micro-processing, although the micro-processing market is developing rapidly However, the current market capacity is smaller than the macro-processing market capacity, but high-precision manufacturing such as wearable devices, semiconductor chips, medical care, and new energy is still a key national support project.

Although various types of lasers focus on different industrial applications, and the market demand for downstream applications is quite different, there are certain differences in their market scales. However, as the global industrial laser market continues to grow, the application of micro-processing in the industrial and consumer sectors will continue to increase in the future.

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Wonder Inc is the leading provider of china laser cutting solutions and has been advancing the application of laser technology since 1995. Research and Development efforts have resulted in numerous patents, with several pending, in our continual pursuit to develop and enhance laser systems that benefit the customer. Our R&D philosophy and execution are based upon designing highly modular solutions which gives customers the flexibility and investment protection to optimize laser systems as their business evolves.