Laser cutting technology and Laser marking technology
Soon after its naissance, laser is regarded as “tool of solution” . Scientists have realized from the very beginning that laser – the strange object – will become the most important technology in this era. Till now, laser has influenced human life dramatically by its decades’ primary application.
Laser marking (carving) technology
Laser marking (carving) technology is the most applied technology in laser processing field. Laser marking (carving) is a marking method to use local irradiation of high-energy density laser to generate chemical reactions like vaporization and color change in the material surface in order to form a permanent marker. It can make any characters, symbols and patterns, with size from millimeter to micron, which is significant in products’ anti-counterfeiting.
The ultra fine focused laser beam is just like a cutting tool which can remove objects’ surface material point by point. Its advancement relies on the non-contact marking process which generate no mechanical squeeze and mechanical stress thus without damage on the workpiece. What’s more, with the small size of laser beam and small heat effect area, it can complete elaborate processing that conventional methods can not realize.
The ‘cutting tool’ of laser processing is the focused light point, no need for adding other equipments or materials. As long as the laser can work well, it is possible to process continuously for a long time. Laser processing is high in speed and low in cost. It is automatically controlled by computer without human intervention.
It is only the content in computer that relates to the marking content of laser. As long as the marking system can recognize the draft design in computer, the marking machine can restore the accurate design information on the proper carrier. So the function of software influence the function of system to a great extent.
Laser cutting technology
Laser cutting technology has been widely used in metal and nonmetal material processing, which greatly reduces the processing time and cost and enhance the quality of workpiece. Modern laser becomes the fantastic sword that would cut clean through iron as though it were mud.
Take Triumphlaser CO2 laser cutting machine as an example, the overall system is composed of control system, motion system, optical systems, water cooling system, smoke control and exhaust system and so on, with an adoption of the most advanced numerical control mode to implement multiaxial linkage and equal energy cutting, regardless of the speed. At the same time, it supports figure formats as DXP, PLT and CNC and strengthens interface graphics rendering capability. The motion accuracy in high speed is obtained from the adoption of superior imported servo motor and drive and guide of control rod.
Laser cutting is accomplished by the application of high power density energy generated from focused laser. Under the control of computer, laser discharges through pulse and a output of high-frequency pulse laser forms light beam of particular frequency and pulse width. After conduction and reflection through optical path and focused by focusing lens group, the pulse laser beam becomes a subtle and high-energy density flare, located near to the surface area to be processed and then it melts and gasifies the material in a moment. Every high-energy laser pulse can sputter a fine hole in a second. Under the control of computer, laser head and workpiece will move relatively and positioning according to the graph thus to get the desired shape. When cutting, a coaxial airflow is jetted from cutting head, blowing the melting and gasified material. Compared with the traditional plank processing methods, laser cutting has high cutting quality, speed, flexibility and wide range of application.
