The Representative Of Welding Technology Progress – Fiber Laser Welding Machine
Prior to the 1970s, the high power continuous waveform (CW) laser had not been developed, so the research focus was on pulsed laser welding (PW).Most of the early laser welding research experiments used ruby pulse lasers. The typical peak output power PM of 1ms pulse is about 5kW, the pulse energy is 1~5J, and the pulse frequency is less than or equal to 1 Hertz.The average output power P of these lasers was quite low, although they were able to operate at relatively high pulse energy, which was mainly determined by the low working efficiency of the lasers and the excited properties of the luminescent materials.Fiber laser welding machine because of its high average power, soon after it appeared to become the preferred equipment for spot welding and seam welding, the welding process is through the welding joint lap, until more than 1kW continuous power waveform laser after the birth of the real meaning of laser seam welding can be realized.
With the growing maturity of digital technology, the digital welding machine and digital control technology of the representative office have entered the market steadily.The three gorges project, west-east gas transmission project, aerospace engineering, shipbuilding engineering and other large national basic projects have effectively promoted the development and progress of advanced welding, especially welding automation technology.The automatization of welding in the manufacture of automobile and parts is changing rapidly.China’s welding industry is gradually moving towards “high efficiency, automation and intelligence”.China’s welding automation rate is less than 30%, with the developed industrial countries 80% gap is far from.Since the end of the 20th century, the country has gradually promoted the basic welding mode of automatic welding — gas shielded welding in various industries to replace the traditional manual arc welding, which has achieved initial results.It can be predicted that in the future, fiber laser welding machine technology will develop at an unprecedented speed.
What is a fiber laser welding machine???
Fiber laser welding machine uses high energy laser pulse to heat the material locally in a small area. The energy radiated by the laser is transmitted to the material through heat conduction and diffusion, and the material is melted to form a specific molten pool.Way it is a new type of welding, the welding of thin wall materials, precision parts, which can realize welding, butt welding, welding stack, seal welding, etc., deep than high, wide weld width is small, small heat affected zone, small deformation, welding speed, welding seam smooth, beautiful, without processing or simply processing after welding, welding quality is high, no pores, can accurate control, focusing on small points of light,High positioning accuracy, easy to achieve automation.
Main characteristics of fiber laser welding machine
Fiber laser welding machine has a high degree of automation and simple welding process.The non-contact operation method can meet the requirements of clean and environmental protection.Using laser welding machine to process the workpiece can improve the working efficiency, and the finished workpiece has beautiful appearance, small welding seam, large welding depth and high welding quality.Laser welding machine is widely used in the processing of dental denture, keyboard welding, silicon steel sheet welding, sensor welding, battery seal cover welding and so on.
Application range of fiber laser welding machine
Fiber laser welding technology has been widely used in car manufacturing abroad and continues to grow at a high speed.If the thickness of the plate is less than 100 microns, the foil can not be fused, but it can be successfully welded by the fiber laser welding machine, which shows the broad future of the fiber laser welding machine.
Because of the special properties and manufacturing advantages of powder metallurgy materials, fiber laser welding machine has entered the processing field of powder metallurgy materials with its unique advantages, and has opened up a new prospect for the application of powder metallurgy materials.
The car industry
Fiber laser welding machine has appeared on a large scale in automobile manufacturing industry and has become one of the outstanding achievements in automobile manufacturing industry.
The electronics industry
Fiber laser welding machine has been widely used in the electronic industry, especially in the microelectronics industry.
Laser welding of biological tissues began in the 1970s. The successful welding of fallopian tubes and blood vessels with fiber laser welding machine and its advantages have made more researchers try to weld various biological tissues and extend it to the welding of other tissues.
Future prospect of fiber laser welding machine technology.
The development of electronic technology, computer microelectronic accommodation and automation technology has promoted the development of automation technology of fiber laser welding machine.Especially, the introduction of numerical control technology, flexible manufacturing technology and information processing technology has promoted the revolutionary development of fiber laser welding machine automation technology.
(1) Intelligent welding process control system is one of the core issues of welding automation, and it is also an important direction of our future research.We should carry out research on the best control methods, including linear and various nonlinear controls.The most representative ones are fuzzy control, neural network control and expert system of welding process.
(2) Flexible welding technology is also the content we focus on.In the future research, we will combine all kinds of optical, mechanical and electrical technology with welding technology organically to realize the precision and flexibility of welding.It is a fundamental way to improve the level of welding automation to transform the traditional welding technology and equipment with microelectronic technology.It is one of our current research directions to combine numerical control technology with various kinds of welding machinery and equipment to improve its flexibility level.In addition, the combination of welding robot and expert system, to achieve automatic path planning, automatic track correction, automatic control of penetration depth and other functions, is the focus of our research.
(3) The integration of welding control system is the integration of human and technology and the integration of welding technology and information technology.The information flow and material flow are the important components of the integrated system, and the integration of the information flow and material flow can greatly reduce the requirement of real-time control.Pay attention to play the human response and judgment ability in the control and emergency processing, establish a friendly interface between man and machine Christmas, make the human and automatic system harmony and unity, is the integrated system can not be underestimated factors.
(4) To improve the reliability, quality stability and control of welding power supply, as well as excellent motion, is also our focus on the research topic.Develop a high performance welding machine which can adjust arc motion, wire feed and welding torch attitude, detect the beginning of weld slope, temperature field, molten pool state and penetration, and provide welding specification parameters in time, and actively develop computer simulation technology of welding process.Make the welding technology from “technique” to “science” evolution roll to realize an important aspect of welding automation.The first decade of this century will be a favorable period for rapid development of welding industry.We welding workers have a long way to go and must set up the determination of knowing the difficulties.Seize the opportunity and strive to improve the level of welding automation in our country.