Laser processing technology

  Laser processing technology is a processing technology that uses the characteristics of interaction between laser beam and material to cut, weld, surface treatment, drilling and micro processing materials (including metal and non-metal). Laser processing technology is a comprehensive technology involving light, machinery, electricity, materials, detection and other disciplines. Its research scope can generally be divided into：

（1）Laser processing system. Including laser, light guide system, processing machine tool, control system and detection system.
（2）Laser processing technology. Including cutting, welding, surface treatment, punching, marking, scribing, fine adjustment and other processing processes。
2、 Current situation and development trend at home and abroad
As the main symbol of the development of science and technology in the 20th century and one of the pillars of optoelectronic technology in the modern information society, the development of laser technology and laser industry has been highly valued by the world's advanced countries.
Laser processing is the largest project in laser application abroad, and it is also an important means to transform traditional industries, mainly including kW to 10kW CO2 lasers and 100W to kW YAG lasers to achieve cutting, welding, drilling, scoring and heat treatment of various materials. According to the latest laser market review and forecast from 1997 to 1998, the total laser market sales in the world reached 3.22 billion US dollars in 1997, an increase of 14% over 1996, including 829 million US dollars for material processing, 300 million US dollars for medical applications and 150 million US dollars for research fields. The total revenue in 1998 is expected to increase by 19% to reach 3.82 billion US dollars.Among them, the first material processing is expected to exceed US $1 billion, and the medical laser is the second largest application abroad.

  In the application field of laser processing, CO2 laser is the most widely used in cutting and welding, accounting for 70% and 20% respectively, while surface treatment is less than 10%. YAG laser is mainly used for welding, marking (50%) and cutting (15%). CO2 lasers account for 70-80% in the United States and Europe. In China, 10% of laser processing is dominated by cutting, of which more than 98% are CO2 lasers with power in the range of 1.5kW~2kW, while about 15% are mainly heat treated. Most of them are cylinder liners of automobile engines treated by laser. This technology has high economic and social benefits, so it has a great market prospect.

  In the automotive industry, laser processing technology gives full play to its advanced, fast and flexible processing characteristics. For example, 3D laser cutting machine is widely used in automobile prototype and small batch production, which not only saves the sample plate and tooling equipment, but also greatly shortens the production preparation cycle; Laser beam makes small holes on high hardness materials and complex and curved surfaces with high speed and no damage. Laser welding has become a standard process in the automotive industry. Toyota of Japan has used laser for the welding of body panels, welding metal plates with different thicknesses and surfaces, and then stamping. Although laser heat treatment is not as common as welding and cutting abroad, it is still widely used in the automotive industry, such as heat treatment of cylinder liner, crankshaft, piston ring, commutator, gear and other parts. In developed countries, laser processing technology, computer numerical control technology and flexible manufacturing technology are combined to derive laser rapid prototyping technology. This technology can not only rapidly manufacture models, but also directly produce metal molds from unmelted metal powders.

  At present, laser drilling is mainly used in aerospace, automobile manufacturing, electronic instrument, chemical industry and other industries abroad. The rapid development of laser drilling is mainly reflected in that the average output power of YAG laser for drilling has increased from 400w five years ago to 800w to 1000w. The peak power of drilling is up to 30~50kw, the pulse width for drilling is getting narrower and narrower, the repetition frequency is getting higher and higher, and the improvement of laser output parameters has greatly improved the drilling quality, improved the drilling speed, and expanded the application range of drilling. At present, the relatively mature application of laser drilling in China is in the production of artificial diamond and natural diamond wire drawing dies and the production of watch gem bearings.

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  At present, the research and development focus of laser processing technology can be summarized as follows:
The research on the new generation of industrial lasers is currently in the technological updating period, which is marked by the development and application of diode pumped all solid state lasers;
Fine laser processing, in the statistics of laser processing application, micro processing accounted for only 6% in 1996, doubled to 12% in 1997, and increased to 19% in 1998;
Intelligent machining system, system integration is not only the machining itself, but also with real-time detection and feedback processing. With the establishment of expert system, intelligent machining system has become an inevitable development trend.

  After more than 30 years of development in China, laser technology has made thousands of scientific and technological achievements, many of which have been used in production practice. The output of laser processing equipment is growing at an average rate of 20% every year, solving many problems for the technical transformation of traditional industries and improving product quality, The quality, function and price of laser marking machine and laser welding machine meet the current domestic market demand, with a market share of more than 90%. In the 1980s, YAG lasers played an increasingly important role in welding, cutting, drilling and marking. It is generally believed that YAG laser cutting can achieve good cutting quality and high cutting accuracy, but the cutting speed is limited. With the improvement of YAG laser output power and beam quality, it has been broken through. YAG lasers have begun to enter the kw class CO2 laser cutting market. YAG laser is especially suitable for welding micro devices that do not allow thermal deformation and welding pollution, such as potassium battery, cardiac pacemaker, sealed relay, etc. YAG laser drilling has become the largest laser processing application.

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Main problems：
The ability to transform scientific research achievements into commodities is poor, and many achievements with market prospects remain in the prototype stage of the laboratory.
The core component of the laser processing system, the laser, has few varieties, backward technology and poor reliability. In foreign countries, not only diode pumped all lI solid-state lasers have been used in the production process, but also diode lasers have been used. In China, diode pumped all solid-state lasers are still at the beginning of research and development.

There is little research on the processing technology, especially on the fine processing technology, and there is little research on the processing of ultraviolet laser.

The reliability, safety, maintainability and matching of laser processing equipment are poor, and it is difficult to meet the needs of industrial production.
3、Objectives and main research contents of the Tenth Five Year Plan
1.Objectives
The main work of the Tenth Five Year Plan is to promote the development of laser processing industry, maintain an average growth rate of 20% of the annual output value of lasers, and achieve an annual output value of more than 20 billion yuan; Popularize and popularize processing technology in industrial production and application, focus on completing demonstration projects of transformation of laser technology in traditional industries such as electronics, automobile, steel, petroleum, shipbuilding, aviation, and provide new laser equipment and instruments for six high-tech fields such as information, materials, biology, energy, space, and ocean
  As a high-quality supplier of laser cutting industrial equipment, Jinan XTlaser Laser has been deeply involved in the industry for 18 years. The company is committed to the R&D, production, sales and full process services of laser industrial equipment such as laser cutting machines, marking machines, welding machines, cleaning machines and supporting automation systems. It is a professional provider of laser industrial application solutions.

Based on the vision of "becoming the first choice of global customers in the field of laser manufacturing", the company adheres to the principle of "making details competitive, sharing the burden of solidarity and cooperation, and growing up in solving problems", adheres to the customer centered, talent oriented, product based, service backed, and wholeheartedly provides you with laser processing equipment with stable performance, excellent technology, and simple equipment operation, We have also established a complete sales and after-sales service system worldwide to provide you with high-quality pre-sales, sales and after-sales support and services. Jinan XTlaser Technology Co., Ltd. is willing to provide you with convenient and fast services!