REVIEW: As a user, you seem to understand the respective fiber lasers and CO2 lasers bane. The so-called Achilles heel is the cutting of the blind spot. Avoid the Achilles heel (blind), and then compete competing short length, suitable for the needs of that one selected.
Laser News: frequently asked: for industrial processing, fiber lasers and CO2 laser which is better? More specifically, it is: two lasers in the end what the strengths and weaknesses? Fiber laser CO2 laser can replace it?
This seemingly simple problem, make it clear that is not necessarily easy.
We tried from many, many angles to provide users with comprehensive information and impartial advice from in order to receive the effect of clearing up doubts.
Laser (hereinafter referred to as fiber laser) fiber laser of wavelength 1.06 m is produced, CO2 laser produces laser light (hereinafter abbreviated as CO2 laser) wavelength of 10.6 m, are infrared light can be absorbed by the material, and applied industrial materials processing.
Cutting is the most widely used industrial laser processing technology. For convenience, the paper launched discussions are based laser cutting, unless otherwise specified.
Two kinds of laser length the pros and cons
As a user, you seem to understand the respective fiber lasers and CO2 lasers bane. The so-called Achilles heel is the cutting of the blind spot. Avoid the Achilles heel (blind), and then compete competing short length, suitable for the needs of that one selected.
Fiber laser bane
Non-metallic fiber laser can not cut, including wood, plastic, leather, cotton and linen fabrics. If the workpiece material to be machined is exactly what non-metallic, the fiber laser can only lose, instead of none other than CO2 lasers.
Automotive interior parts are mostly non-metallic materials, high-precision robot + CO2 laser machining system, cutting its space surface, this laser beam machining system need to be addressed in the joint between the robot transmission problems.
Fiber laser can not cut with the coated surface of the material, such as ordinary stainless steel coated with anticorrosive coatings of special steel. There is not enough attention to this user, and the choice of fiber lasers had to be issued ordinary coating stainless steel cutting. If you want to use a dedicated fiber laser film, the cost is increased.
CO2 lasers bane
CO2 laser can not cut copper, including brass, copper. If you need to cut copper, fiber laser grid only enough.
For CO2 laser, a copper and a high reflective material, almost all the laser light is reflected without being absorbed; light reflected back into the laser, causing harm.
CO2 laser reflectivity of aluminum is higher. Install isolator back reflector, which can effectively protect the CO2 laser, which can be safely cut aluminum.
And from our cost cutting speed, piercing efficiency, quality and other aspects of cross-section, the bringing of two competing lasers to fight short length.
Here, in order to facilitate the comparison of the two lasers cost difference is calculated only the cost of electricity, supplies, medium gas composed of three parts, the cost of this three-part, they are different; manpower, depreciation, space, cutting gas for two kinds of lasers, the same cost, it does not count.
Two kinds of lasers are required to spend a huge amount of electricity. Power fiber laser – optical conversion efficiency of about 30%, CO2 laser is about 10%. In terms of 3000W laser, fiber laser power of about 10kW of electricity, and CO2 laser power of about 30kW. In price 1 yuan / kWh, accounting for 70% load meter, the costs were 7 yuan / hour, 21 yuan / hour.
Further, due to different efficiency, therefore, the heat generated by the laser two kinds of different specifications (cooling capacity) of water chillers require different. Power fiber lasers require water-cooled machine is 13kW, CO2 laser power required for water-cooled machine is 18kW. In price 1 yuan / kWh, accounting for 70% load meter, the cost was 9 yuan / hour, 12.8 yuan / hour.
In everyday use, the use of fiber laser cutting machine (hereinafter referred to as the fiber cutting machine) cost the materials: focusing mirror, ceramic bodies, nozzles, protective glass, etc., costs about 3 yuan / hour.
In addition, according to statistics four years, and beam expander laser module has its own life, resulting in about 4 yuan / hour, respectively, and 1 yuan / hour costs (special instructions, the smallest unit of ROFIN fiber laser is a semiconductor module to be replaced , cost about 1 yuan / hour).
Using CO2 laser cutting machine (hereinafter referred to as the CO2 cutting machine) cost the materials: focusing mirror, ceramic bodies, nozzles, mirrors, etc., cost about 2.5 yuan / hour.
Fiber laser medium without gas; CO2 gas lasers need to use the media to produce laser light, cost about 1 yuan / hour.
In addition, CO2 laser every 3,000 hours of routine inspection every 6000 hours for in-depth inspection, about 2 yuan / hour costs are incurred.
In summary, the use of fiber lasers cost about 24 yuan / hour, CO2 laser is about 38.3 yuan / hour, a difference of 14.3 yuan / hour. Use 10 hours per day, the daily cost difference of 143 yuan.
The difference between the two laser on the market saying the cost of, somewhat exaggerated.
Incidentally, fiber laser transmission medium is optical fiber, optical fiber beam enclosed in “to curve”, not subject to external environmental impacts. CO2 laser transmission medium is air, straight lines, by a mirror to change the transmission direction, susceptible to external environmental impacts, you may need to maintain the mirrors, thereby slightly increasing the cost.
Cutting speed, piercing efficiency, quality, and so constitutes section laser cutting performance, evaluating laser (machines) comprehensive index.
Fiber laser cutting sheet has an advantage, in particular the thickness of 3mm or less, have obvious advantages, with respect to the CO2 laser, the maximum cutting speed ratios up to 4: 1; and 6mm thickness of two kinds of lasers are critical advantages interchangeable. Cutting thickness> 6mm plate, the fiber laser no advantage; with increasing thickness, CO2 fade advantage, but not significantly.
Overall, the cutting speed or fiber lasers have the advantage.
Laser beam cutting the workpiece before the start, we need to penetrate the workpiece. Fiber laser perforation time was significantly longer than CO2.
Or to 3kW fiber lasers and CO2 lasers for example. For carbon steel having a thickness of 8mm, the latter is at least 1 second; when 10mm, which is at least two seconds; thickness increases, CO2 lasers advantages in terms of perforation increasingly significant.
With perforation 2000 times a day, every 3 seconds, count the time difference perforation, perforation of the day, the time difference is 6000 seconds, or about 1.7 hours.
CO2 laser perforation due to higher efficiency, reduced 1.7 hours per day use the machine time. Even with more conservative data included artificial (30 yuan / hour), depreciation of equipment (25 yuan / hour) and field (2 yuan / hour) expense, cost savings have (CO2 laser):
1.7 × (30 + 25 + 2 + 38.3) = 162 (yuan)
Section quality usually refers roughness (finish), verticality.
The following cutting 3mm thick steel plate, fiber laser cutting section quality (roughness and vertical degrees) slightly worse than CO2. As the thickness increases the mass difference sectional increasingly apparent.
≥3mm thickness stainless steel, fiber laser cutting section was frosted, and CO2 was bright like.
16mm thick carbon steel, vertical cross-section of the optical fiber laser cutting far worse than CO2, the former is 0.4 ~ 0.5mm, the latter up to 0.1mm.
In addition, carbon fiber plate laser energy absorption rate, cutting holes (≤ aperture plate thickness), it could be a disadvantage, poor cut quality.
Incidentally, laser cutting precision regardless of what kind of laser and machine positioning accuracy, repeatability, consistency kerf width of about. Fiber laser cutting slits narrow, CO2 slit slightly wider. However, the width of the slit does not affect the accuracy of parts, because by cutting compensation function, you can offset the slit width.
Fiber lasers and CO2 lasers exactly what good
With these data, it is easy to arrive at a logical conclusion, in order to make a rational choice.
Generally speaking is not good fiber laser, it can not generally speaking is good CO2 laser. It should be analyzed based on a particular application, judgment.
No advantage. Cutting speed comparable with the CO2 laser. Section quality, the piercing efficiency was inferior to the CO2 laser.
There are advantages: cutting speed slightly faster than the fiber laser; good section quality; high piercing efficiency, the time can be reduced and more than offset the higher cost of fiber lasers.
We see, fiber lasers and CO2 lasers in the face of the needs of a particular application has its own strengths and weaknesses. Within the current and future period of time, fiber lasers and CO2 lasers can not replace each other, but only complementary coexistence. Radially polarized CO2 laser technology noteworthy progress, may narrow the gap in the fiber laser sheet cutting aspects.
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