The research team of the Moscow Institute of Physics and Technology cooperated with scientists from the Institute of Applied Physics of the Russian Academy of Sciences to develop a cheap and powerful ceramic-based laser pointer scalpel. The advent of this scalpel will make it easier for doctors to cut and carve composite materials without causing serious injuries to patients during surgery.
In the field of laser manufacturing, pottery is a very promising medium. Compared with single crystal materials, ceramics are cheaper and easier to process, and these properties are very important for mass production. This “pump” laser, which can radiate excitation energy in the infrared region, is composed of a rare earth element compound fused with lutetium oxide and thulium ion additives and a special process. Its radiation energy conversion efficiency exceeds 50%, which is significantly higher than solid state Laser transmitter. The wavelength of the laser beam is in the range of 1966-2064 nm, which is most suitable for medical applications.
Breakthrough in 12kW laser-arc hybrid welding for ship plates over 14mm
Plates are widely used in engineering fields such as shipbuilding, construction, machinery manufacturing and pressure vessels, and their welding operations are also an important part of the industry’s production. The traditional welding process of medium and thick plates is complicated, the quality is unstable, and the degree of automation is low, and the welding efficiency is greatly restricted. Therefore, the development of a welding process that meets its requirements has become an urgent engineering problem to be solved.
With the continuous development of blue laser pointer, ultra-high-power and high-quality fiber lasers with a power exceeding 10,000 watts have been put into the market and gradually applied to high-efficiency laser welding of medium and thick plates. The laser beam power density can reach 107～108W/cm2, which makes the The high-quality, high-speed, large penetration, low-deformation, and low-energy-consumption welding of thick plates and large components is expected to obtain new solutions.
Many studies have shown that combining the two heat sources of laser and arc in a specific way for welding not only gives full play to their unique advantages, but also makes up for their shortcomings, and truly achieves the effect of “1+1>2”. The implementation of this welding method can meet the requirements of most alloy systems for high-quality welding quality under different application conditions. Therefore, the use of laser-arc hybrid welding of medium and thick plates is also considered to be one of the most competitive and promising welding methods.
Since the launch of 6000W laser, through sincere cooperation with customers, various technological problems have been broken through. At present, a number of high-power laser engraver have been demonstrated in typical applications in automobile manufacturing, construction machinery, rail transit and other fields, and laser arcing for medium and heavy plates Compound welding.
A well-known automation company used a 12000W laser to provide laser-arc hybrid welding equipment for a key shipyard. With the Luochi welding machine, the plate thickness was 6-14mm and the weld length 4-9m laser-arc hybrid welding, focusing on solving the problem. There are reliability problems of single-sided welding and double-sided forming and back welding seam penetration that cannot be solved by the arc welding process, and welding distortion is reduced by 50%. Among them, 6～10mm plates do not need to be grooved and can be directly welded; 12～14mm plates have a better welding effect.