Laser welding machine is divided into three categories, one is the YAG laser welding machine, the second is the fiber optic transmission laser welding machine, the third is the continuous laser welding machine also known as fiber laser welding machine. Here are several welding machines are introduced to the advantages and disadvantages.
A YAG laser welding machine
YAG laser welding is the implementation of high-energy pulsed laser welding of the workpiece, it is a pulsed xenon lamp as a pumping source to ND: YAG as a laser generating material. Laser power supply will first pulse xenon lamp pre-ignition, through the laser power supply on the pulse xenon lamp discharge, so that the xenon lamp to produce a certain frequency and pulse width of the light wave, the light wave through the concentrator cavity irradiation of the ND: YAG laser crystal, so as to stimulate the ND: YAG laser crystal to produce laser light, and then through the resonant cavity to produce the wavelength of 1064nm of the pulsed laser light, the laser beam after beam expanding, reflecting (or through the fiber optic transmission), focusing and then radiation to the surface of the workpiece, so that the workpiece surface, so that the workpiece is not a laser. The laser beam is expanded, reflected (or through fiber optic transmission, focusing and then radiated to the surface of the workpiece, so that the workpiece is locally melted to achieve welding. The frequency and pulse width of the pulsed laser, the speed and direction of table movement can be controlled by PLC or industrial PC, and the size of the laser energy can be controlled by adjusting the size of the current, the frequency and pulse width of the laser.
Advantages:
1: High depth to width 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 densification. Weld generation process, the molten pool is constantly stirring, the gas escapes, generating non-porous fusion weld. The high cooling rate after welding is easy to make the weld organization microfine, weld strength, toughness and high overall performance. Disadvantages
Disadvantages:
1. energy consumption is relatively high, more power consumption, the power per hour in 16-18KW
2. welding spot size is not uniform
3. welding speed is slow
4. laser tube often need to be replaced, about half a year or so to replace one.
Two fiber optic transmission laser welding machine
Fiber optic transmission laser welding machine is coupled into the high-energy laser beam into the optical fiber, long-distance transmission, through the collimator mirror collimated into parallel light, and then focused on the workpiece to implement the welding of a laser welding equipment. The welding is difficult to access the parts, the implementation of flexible transmission of non-contact welding, with greater flexibility. Fiber optic transmission laser welding machine laser beam can realize the time and energy on the split light, can carry out multi-beam simultaneous processing, for more precise welding provides the conditions. Advantages:
1. Fiber optic transmission laser welding machine optional CCD camera monitoring system, easy to observe and precise positioning.
2. Fiber optic transmission laser welding machine welding spot energy distribution is uniform, with the welding characteristics of the best spot required.
3. Fiber optic transmission laser welding machine to adapt to a variety of complex weld, a variety of devices, spot welding, as well as within 1mm thin plate seam welding.
4. Fiber optic transmission laser welding machine adopts imported ceramic spotlight cavity, corrosion resistance, high temperature resistance, cavity life (8-10) years, xenon lamp life.
5. Specialized automated jigs and fixtures can be customized to achieve mass production of products.
Disadvantages:
1. High energy consumption, more power consumption. Power consumption per hour in about 10
2. welding speed is slow
3. shallow depth of fusion, it is more difficult to achieve the depth of welding
Three Fiber Laser Welding Machine
Fiber Laser Welding Machine is a high-power fiber laser is directly generated by the continuous laser, different from the pulsed laser, stable performance. Good light
Advantages:
1. laser beam quality is very good, fast welding speed, weld solid and beautiful
2. industrial PC control, the workpiece can be done in a plane trajectory movement, you can weld points, straight lines, circles, squares, or straight lines and arcs composed of any planar pattern;
3. electro-optical conversion rate is high, low energy consumption, long-term use of the user can save a lot of processing costs. Save a lot of processing costs for the long-term use of the user;
4. equipment, high reliability, can be 24 hours of continuous and stable processing, to meet the needs of industrial mass production processing;
5. Because of the small size of the machine, and is a soft optical path, can be used with most of the tooling and automation equipment
Disadvantages:
With the other welding equipment, the price is slightly higher than the analogous.