The difference between continuous laser welding and pulsed laser welding is explained as follows.
Most of the continuous laser welding are high power lasers, with power above 500 watts. Generally, this laser should be used for plates above 1mm. Its welding mechanism is based on the small hole effect of deep fusion welding, the depth to width ratio is large, can reach more than 5:1, welding speed is fast, small thermal deformation. It has a wide range of applications in machinery, automobile, shipbuilding and other industries. There is also a part of the low-power continuous laser, power between tens to hundreds of watts, they are used more in plastic welding and laser brazing these industries.
Pulsed laser is mainly used for spot welding and seam welding of thin-walled metal materials within 1mm thickness. The welding process is heat conduction type, i.e. laser radiation heats the surface of the workpiece and then diffuses to the inside of the material through heat conduction, and a good connection is formed between the workpieces by controlling the parameters of laser pulse waveform, width, peak power and repetition frequency. It is used in a large number of applications in industries such as 3C product housings, lithium batteries, electronic components, and mold mending.
The biggest advantage of pulsed laser welding is that the overall temperature rise of the workpiece is very small, the heat affected range is small, and the deformation of the workpiece is small.
Laser welding is a fusion welding process in which a laser beam is used as the energy source to impact on the weld joint. The laser beam can be guided by a flat optical element (e.g. a mirror) and subsequently projected onto the weld with a reflective focusing element or lens. Laser welding is a non-contact welding process that does not require pressure, but requires the use of Click for more an inert gas to prevent oxidation of the melt pool. Laser welding can be combined with MIG welding to achieve a large depth of melt, while the heat input is greatly reduced compared to MIG welding.
Laser welding is one of the most important components of laser material processing. Laser welding is a precision welding technology that uses a high-energy beam as a heat source. Its main purpose is to heat the surface of the workpiece by a high-energy laser beam, and the heat spreads from the surface of the material to the inside, and by adjusting the parameters of the laser pulse, the corresponding material melts and forms a specific molten pool.
The principle of laser welding can be divided into heat conduction type welding and laser deep melt welding. Laser assembly welding is the use of laser energy to combine materials of different materials, thicknesses or shapes to meet the demand for material performance in different situations, which can achieve equipment lightweighting with the lightest weight, optimal structure and best performance.
So, what are the advantages of laser welding machine in the field of thin plate welding?
Laser welding machine in the field of thin plate welding has the following advantages analysis.
Stainless steel materials are widely used in the manufacture of various finished products, of which the welding of stainless steel sheet has become an important process in the production and manufacturing process. However, due to the characteristics of thin stainless steel itself, also caused a certain degree of difficulty in welding, and once became a welding problem in the field of thin stainless steel.
Traditional welding machine processing thin stainless steel has a big problem, thin stainless steel due to its thermal conductivity is very small, about only one-third of ordinary low carbon steel, the degree of constraint is small, so once the local heating and cooling in the welding process, it will form uneven stress and strain, the longitudinal shrinkage of the weld on the outer edge of the thin stainless steel plate to produce a certain pressure, traditional welding machine once the pressure is too large will Once the pressure of the traditional welding machine is too large will cause the workpiece wave deformation, not only affect the beauty of the workpiece will also affect the quality of the workpiece, in addition to overburning, burn through the problem.
The emergence of fiber laser welding machine is a good solution to this problem, laser welding is the use of high-energy laser pulses to the material in a small area of local heating, laser radiation energy through heat conduction to the internal diffusion of the material, the material melted to form a specific melt pool. High welding depth to width ratio, small weld width, small heat affected zone, small deformation, fast welding speed, flat and beautiful weld seam, no or simple treatment after welding, high quality weld seam, no porosity, precise control, small focusing spot, high positioning accuracy, easy to realize automation. Laser welding machine with a number of advantages is gradually replacing the traditional thin plate welding market.
This is the analysis of the advantages of laser welding machine in the field of thin plate welding. Laser welding machine is widely used in dental denture processing, circuit board welding, splicing steel welding, sensor welding, battery sealing cover welding, etc.