YAG laser welding machine
YAG laser welding is to weld the workpiece with high-energy pulsed laser, with pulsed xenon lamp as the pumping source and Nd: YAG as the working substance to generate laser. The laser power supply firstly pre-ignites the pulsed xenon lamp, and then discharges the pulsed xenon lamp through the laser power supply, so that the xenon lamp generates light waves with a certain frequency and pulse width. The light wave irradiates the Nd: YAG laser crystal through the condenser cavity, which excites the Nd: YAG laser crystal to generate laser, and after passing through the resonator, the pulsed laser with the wavelength of 1064nm is generated. The laser beam is expanded, reflected (or transmitted by optical fiber) and focused, and then irradiated to the surface of the workpiece, so that the workpiece is partially melted and welding is realized. The frequency, pulse width, moving speed and moving direction of pulsed laser needed for welding can be controlled by PLC or industrial computer, and the laser energy can be controlled by adjusting current, laser frequency and pulse width.
Advantages:
1: high aspect ratio. The weld is deep and narrow, and the weld is bright and beautiful.
2. Due to the high power density, the melting process is extremely fast, the heat input to the workpiece is very low, the welding speed is fast, the thermal deformation is small, and the heat affected zone is small.
3. High compactness. In the process of weld formation, the molten pool is constantly stirred, and gas escapes, forming a penetration weld without pores. The high cooling rate after welding is easy to refine the weld structure, and the weld strength, toughness and comprehensive performance are high. disadvantaged
Disadvantages:
1. The energy consumption is relatively high, and the power per hour is 16- 18KW.
2. Solder joints are uneven in size.
3. The welding speed is slow
4. The laser tube should be replaced frequently, about once every six months.
Double optical fiber transmission laser welding machine
Optical fiber transmission laser welding machine is a kind of laser welding equipment, which couples high-energy laser beam into optical fiber, collimates it into parallel light through collimator, and then focuses it on the workpiece for welding. For parts that are difficult to get close to welding, non-contact welding with flexible transmission is more flexible. The optical fiber transmission of laser beam of laser welder can split time and energy, and can process multiple beams at the same time, which provides conditions for more accurate welding. Advantages:
1. Optical fiber transmission laser welding machine is equipped with CCD camera monitoring system, which is convenient for observation and accurate for positioning.
2. The energy distribution of laser welding spot transmitted by optical fiber is uniform and has the best spot required by welding characteristics.
3. The optical fiber transmission laser welding machine is suitable for all kinds of complicated welds, spot welding of various devices and seam welding of thin plates within1mm. ..
4. The optical fiber transmission laser welding machine adopts imported ceramic condenser cavity, which is corrosion-resistant and high temperature-resistant, with a cavity life of (8- 10) years and a xenon lamp life.
5. The special automatic fixture can be customized to realize mass production of products.
Disadvantages:
1. High energy consumption, relatively power consumption. Power consumption per hour is about 10.
2. The welding speed is slow.
3. Due to the depth of melting, it is difficult to achieve deep welding.
Three-fiber laser welder
Fiber laser welding machine is a continuous laser directly generated by high-power fiber laser, which is different from pulsed laser and has stable performance. Good light output
Advantages:
1. The laser beam has excellent quality, fast welding speed and firm and beautiful weld.
2. Industrial PC control, the workpiece can move in a plane trajectory, and any plane figure composed of points, lines, circles, squares or lines and arcs can be welded;
3. The electro-optical conversion rate is high and the energy consumption is low, which can save a lot of processing costs for users after long-term use;
4. The equipment has high reliability and can be continuously and stably processed for 24 hours, meeting the needs of industrial large-scale production and processing;
5. Because of its small size and soft light path, the machine can cooperate with most tooling and automation equipment.
Disadvantages:
Compared with other welding equipment, the price is slightly higher.