Determine whether the parameters of the laser welding machine belonging to the advanced
Laser welding have a direct impact on the quality of the parameters include: laser pulse energy laser beam spot diameter, laser pulse frequency of the laser pulse, the pulse laser, welding material was relatively light absorption rate, welding speed, the protection of Gas and so on.

     The laser pulse energy: refers to the largest single laser pulse of energy output, is a unit J (J). This is one of the main parameters of the laser, which determines the laser can produce the greatest energy, in accordance with the purpose of repairing mold, the laser energy in the following 70J has been able to meet the needs of any occasion, another big energy is wasted, or Access to, and bring the size of laser power and increasing the size of the radiator, reducing power efficiency.

     Focused laser spot diameter: This is a laser designed to reflect the performance of a very important parameter, is a unit (mm), which determines the laser power density and processing area. If the laser-the-art optical design, laser focus on energy, focusing accuracy, can control the laser spot diameter of 0.2mm-2mm range, and whether the laser focus of 0.2mm in diameter to control the laser generator is a strict Test. General internal design of the laser, only want to cut costs as a result, the laser device processing simple design is not strict enough, in the laser resonator, divergence serious, leading to difficulties in determining the focus of its laser output of the laser spot diameter is less than S Said the 0.2mm, but can only meet the minimum 0.5mm, and as a result of the laser divergence, so that the output of laser beam rules were not round, which resulted in the actual laser irradiation area is too large, there ablation of the weld, That is, in the weld at both ends of the unnecessary laser welding and make the two ends of a depression, this phenomenon has been polishing for the repair of Die impact is particularly severe, and sometimes will die scrapped. Cape with laser's well-designed, rigorous standard of finish and carefully debugging, so the output of the laser beam spot diameter can be carried out sophisticated surveillance, so that the focus of the beam can reach the size of the smallest 0.2mm, and 0.2mm and 2mm in the range No grade for conditioning, to reach the international advanced level.

     The laser pulse frequency: This is a reflection of the laser can be played within one second of the number of pulses of capacity, is a unit (Hz). First of all, should be noted that the use of laser welding of metal is the energy, and in the laser power constant, the higher the frequency, each of the laser output energy of a smaller, so we need to ensure adequate energy laser melting metal , To consider the speed of processing, can set the laser output frequency. Laser tools in the repair the occasion, 15Hz have been able to meet the needs of the welding, high frequency is bound to cause the laser pulse energy is too low, resulting in the failure of welding.

     The laser pulse: The use of laser welding for the processing, laser pulse in the pulsed laser welding is an important issue. When high-intensity laser incident to the surface of the material, the metal surface will be 60% to 98% of laser energy reflected from, with the surface reflectivity and temperature. As a result, various kinds of metal for laser and laser reflectivity of the utilization of different, it is necessary to effectively carry out the welding must enter a different form of lasers, so the Department weld metal can be organized in the best crystallization of the formation and matrix Metal consistent, high-quality welds can be formed. Domestic machines are generally used for low-cost single-wave laser power, welding its flexible low, it is difficult to adapt to a variety of mold welding materials, and often have to rework much of a waste of time for welding materials and may lead to mold Scrapped. Different metal materials on the surface of the laser absorption and reflection of the extent of differences, and the laser with a bunch of different metal welding will produce different results and their impact on penetration, welding speed, speed and crystal hardness, so a single rectangular wave Welding will not solve the different welding metal mold. TPM & P with the smart use of laser welding to repair mold unique to the domestic intelligence wave technology, laser welding system to achieve a high degree of flexibility, according to different applications and adjust the waveform so that the weld metal with metal matrix, or die Metal welding, weld hardness reach HRC50-HRC58, to achieve true non-destructive welding, has greatly enhanced the quality of repair welding.