In 2021, China will be the only major economy in the world to recover rapidly from the 2020 epidemic. The added value of industries above designated size in the whole year will increase by 9.6% over the previous year, of which the added value of high-tech manufacturing and equipment manufacturing will increase respectively. 18.2%, 12.9%. In particular, China’s laser industry has developed rapidly in recent years, and the scale of the laser industry chain has increased rapidly. In 2020, the total sales revenue of laser equipment (including imports) in the fields of industry, information, commerce, medicine and scientific research will be 69.2 billion yuan, a year-on-year increase over 2019. up 5.2 percentage points. With the continued prosperity of photovoltaic, power battery, automobile and other industries, the overall sales revenue of China’s laser equipment market will increase by 15.6% year-on-year in 2021, reaching 80 billionyuan.
With the increasing application of fiber lasers, the reliability of fiber lasers has attracted more and more attention, including the reliability of laser output performance, the reliability of electronic components, the reliability of optical devices, the reliability of systems, etc. Wait. Most of these are closely related to the thermal properties of the laser itself. In addition, the temperature has a great influence on the performance of the laser, especially the output power and output stability of the laser.
Consecutive signing of 2000 units of orders ,Can air-cooled handheld laser welder become a new tendency?
At the beginning of 2022, Shanghai GW Laser successively signed 2 orders for 1,000 air-cooled handheld laser welding machines with Aoxin Laser and MORN Laser, which aroused attention and discussion in the industry. Some people think that the market threshold of hand-held laser welding is low, easy to roll in, and the development prospect is not great; some people think that the air-cooled hand-held welding represented by IPG and GW has obvious advantages and is expected to become a new tendency for laser applications.
Additive manufacturing (3D printing) of metal materials is in great demand in aviation, aerospace, navigation, vehicles, mold manufacturing, medical equipment and other fields. At present, the heat source used in the metal additive manufacturing process includes three high-energy beams of laser beam, electron beam, micro beam plasma and sintering heat input, etc., of which the laser beam is the most widely used high-energy beam heat source in the field of metal additive manufacturing. Compared with the electron beam and microbeam plasma heat source, the laser beam has the advantages of fine spot, low cost, and directional action to the specified material position, which can realize the instantaneous melting of metal materials and meet the requirements of fusion channel lapping and part forming.
Laser welding is to focus the laser beam on the surface of the workpiece through an optical lens, so that the material is rapidly melted to form a molten pool, and then rapidly cooled to form a welded joint. It has the characteristics of large aspect ratio, fast welding speed, and non-contact with the workpiece, which is easy to achieve Automated production, so this process has been widely used. However, due to the complex interaction between the laser heat source and the material during the laser welding process, as well as the special physical properties of aluminum alloys and copper alloys, high-reflection materials have high laser reflectivity during welding, unstable welding process, and easy to produce porosity defects, etc. problem. When using ordinary lasers to weld highly reflective materials such as aluminum and copper, the collapse of the keyhole will produce small holes and splashes. Due to the splashes, the weld metal will be reduced, resulting in pits and uneven surfaces; moreover, these materials have high laser reflectivity, The absorption rate is low, and most of the energy is reflected, resulting in poor fusion of the filler; at the same time, during the cooling process, due to the excessive cooling speed, the solubility of hydrogen and other gases in the molten pool is sharply reduced and it is too late to escape, resulting in pores. produce.
On December 29, 2021, GW (Shanghai) Laser Technology Co., Ltd. successfully passed the national standard certification of “Enterprise Intellectual Property Management Specification”(GB/T29490-2013),and obtained the “Intellectual Property Management System Certification Certificate” supervised by the China National Certification and Accreditation Administration 。