It travels at 299.792.458 meters per sec. Its visible spectrum ranges from 400 to 700 nanometers. Its smallest unit is a packet of energy, a photon. It is light, and its use is growing in tube and pipe production and fabrication facilities throughout the world.
In most of its natural and artificial forms, light has little power. However, a groundbreaking invention in the latter half of the 1950s increased its power and concentrated it in a small area. Thus was born a modern and revolutionary concept: Light Amplification by Stimulated Emission of Radiation, or laser.
A fiber laser is a special type of laser in which the beam delivery as well as the laser cavity is integrated into a single system inside an optical fiber with the beam generated within the fiber, unlike conventional lasers where the beam is generated outside and sent into the system. Considered as a special category of solid state laser, fiber lasers provide many benefits compared with other laser technologies, such as:
Ease of use
High integration capability
Fiber lasers are "the" recognized powerhouse in the manufacturing sector of numerous industries because of the throughput, reliability, and low cost of operation they make possible for machines that cut, weld, mark, and micromachine materials. Specific design elements distinguish fiber lasers among other industrial laser sources, and their unique attributes are enabling breakthrough manufacturing process capabilities. Specifically, high-power single-mode lasers for remote welding and widely flexible pulsed fiber lasers for cutting can address different process challenges by the full electronic control of all operating parameters.
The fiber laser is exceptional efficient at converting relatively low-brightness pump light from laser diodes into high-brightness output, where the output beam quality is often the only spatial mode allowed by the physics of the fiber design. Even though fiber lasers were capable of very high (100 W) output as early as the 1990s, it took the crash of the fiber communications market in 2001 to enable the commercial development of reliable fiber lasers. During the 1990s, companies spent billions of dollars solving the basic problems of coupling diodes to fibers with high reliability, splicing fibers with high power density, qualifying component technologies to meet the 25-year reliability required by undersea communications, and reducing the cost of these high-performance, high-reliability components.
Then, in the early 2000's, with the communications market all but gone, the technology investment was quickly redirected and tuned for use in the design of industrial fiber lasers.
Fiber lasers are unique among all other industrial laser types because of two attributes: a sealed optical cavity and a single-mode, guided-wave medium. Modern fiber lasers, by design, have a fully sealed optical path that is immune to environmental contamination and remains optically aligned without need for adjustment. All internal components are either in-fiber or hermetically fiber-coupled, and the only free-space interfaces occur at the beam delivery optic, which includes a fused beam spreader to reduce the intensity at the first free-space interface. The active optical path is typically within a fiber waveguide that allows only one spatial mode of propagation (currently up to about 20 kW of optical power). Higher-power fiber lasers combine single-mode modules into high-brightness delivery fiber in fused fiber combiners.
The combination of the single-mode waveguiding and the fully sealed optical cavity provides a robust laser design that is fixed and measured at the time of manufacture and has minimal variation over time and temperature. Sealed pump diodes and nondarkening fiber technology result in lasers that can be used continuously in production for years without adjustment or degradation.
Basically when cutting with the laser the beam is focused on the material through the hole in the nozzle. This heats the material and melts it. A cutting gas, which as a rule flows co-axially through the nozzle, removes the molten material.
Laser Cutting is an innovation that uses a laser to cut materials and is regularly utilized for modern assembling applications. Laser cutting machine works by coordinating the yield of a powerful laser most usually through optics. CNC laser cutting is utilized to coordinate the material or the laser beam created. Driving Laser cutting companyand a standard business laser for cutting materials would include a movement control framework to take after a CNC or G-code of the example to be cut onto the material. Modern Laser cutters are utilized to cut level sheet material and in addition basic and channeling materials.
Spare time and effortlessly locate the main laser cutting companies and services in india that are propelled cutters and can give reasonable, turnkey answers for all your cutting needs.
The laser cutting service or process uses a strong focused laser beam, produced by a laser diode. The high energetic laser beam heats the surface of the material and melts rapidly a capillary in the material. The diameter of the capillary responds to the diameter of the used laser. During the cutting process, an assistant gas is used to eject the molten material from the kerf. As a result, the cut quality and speed are very high compared with other cutting technologies.
You can choose between three basic types:
With sublimation cutting, the laser beam brings the material to its vaporisation point directly (Sublimation). An inactive (inert) cutting gas such as Nitrogen forces the molten material out of the cut. Typical materials are, amongst others, wood and plastic. Thin metals can also be cut in this way.
Flame (oxygen cutting) by contrast, is characterized by the fact that the material is only heated to its ignition temperature. Oxygen is used as cutting gas, so that the material burns and forms an oxide which melts through the additional energy from burning. The cutting Oxygen then forces the slag out of the cut. Typical material is, for example, low alloy steel (Mild Steel).
For fusion cutting, the material is melted directly by the laser beam. As with sublimation cutting, an inert gas, usually Nitrogen, is also used here to force the molten material out of the cut. This process is typically used for alloyed steels (Stainless Steel).
All processes have in common that, because of the narrow focus of the laser beam, the width of cut (kerf width) is very small compared to the other thermal cutting processes. Thus minimum material is melted and the laser energy is used very efficiently. The heat input into the material is thus relatively low so that even small geometries can be cut.
In addition, the cut edge is relatively straivght which in all gives very high component accuracy from the cutting process.
This means that laser cutting system is used in the most diverse areas, specifically wherever high accuracy for the component geometry and the cut edge is required. The preferred range for steel sheets is up to a material thickness of 20 mm, under certain circumstances up to 25 mm. For this application mainly the CO2 Laser and Fiber Laser are used. For greater thicknesses, laser cutting only makes sense for special applications, more usually other cutting processes (oxyfuel or plasma cutting) are used here.
Plate thickness: 0.1 mm up to 50 mm
Typical: 0.5 mm up to 25 mm
- Laser light can be well focused from 50 mm to 0.2 mm
- Laser radiation: coherent, monochromatic, high energy
- Very high power density (some MW/cm2)
- The light melts or partially vaporises the material and an additional gas stream blows it away
- High to medium cut quality (roughness)
- Smooth to rough, vertical planes of cut
- Metallurgical perfect surfaces (oxidized) or metallically blank surfaces (high pressure inert gas cutting)
- Low heat input
- High to low cutting speeds
- Hardening within the area of the Heat-Affected-Zone (HAZ) (small)
- Dust as well as UV and IR-radiation