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How to choose a laser welding machine


2013 laser welding machine manufacturers more and more, especially some small and medium manufacturers. Which led to a wide range of welding machines, in the choice of diversification at the same time to customers choose a good laser welding machine has brought confusion. In this, I would like to buy laser welding machine from the following aspects to give you a simple description:
     1, optical characteristics: from the laser spot focus diameter, spot position, spot incidence angle, focal plane height, depth of field and other aspects to proceed to consider.
     2, energy feedback: currently in the market sales of laser welding machine from the control characteristics of the main points
For two major categories: current negative feedback and negative feedback of laser power.
        The current negative feedback is a control mode that controls the laser pumped xenon lamp current to keep the xenon lamp current constant at a time. However, the laser output power is not linearly proportional to the current of the pumped xenon lamp, and with the prolongation of the use time of the pump xenon lamp, the electro-optical conversion efficiency is significantly reduced, and the output laser energy is reduced, thus affecting the welding effect Sex.
        The laser power negative feedback is a control method that adds a photodetector to the output of the laser cavity, compares the detected laser power with the desired laser power, and controls the size of the xenon lamp pump current.
       3, laser power waveform: In general, the output of the same laser energy under the premise of the wider pulse width, the greater the spot; laser power waveform peak power higher, the deeper the spot. At present, there is no set of complete laser power waveform setting method, the user can gradually explore the use of the process, to find their own products, laser power waveform.
       4, the frequency of laser pulse: the frequency of laser pulse: This is a reflection of the laser in a second can play the number of pulses, the unit is (Hz). It should be noted that the welding metal is the energy of the laser, and in the case of a constant laser power, the higher the frequency, the smaller the energy of each laser output, so we need to ensure that the laser energy is sufficient to melt the metal Of the case, consider the speed of processing, can be set out the laser output frequency. In the case of laser repair abrasive, 15Hz has been able to meet the needs of welding, and high frequency is bound to cause the laser pulse energy is too low, resulting in welding failure.
        5, the energy of laser pulse: laser pulse energy: refers to a single laser pulse to the maximum output energy, the unit is J (Joule). This is a major parameter of the laser, which determines the maximum energy that the laser can produce. According to the purpose of the mold repair, the laser energy has been able to meet the needs of any occasion under 70J, and then the energy is too much, or at all Not to use, but also bring the laser power supply volume and the size of the radiator continues to increase, reducing the efficiency of the use of power.
     Finally summarize the choice of laser welding machine for the main purpose of the welding of the product, so
The choice of laser welding machine, the impact of batch processing yield is essential; therefore, the user under the premise of conditions permit, as far as possible the use of laser power real-time negative feedback welding machine to improve product quality.
     The above is the little brother in contact with the laser welding machine time, slowly explore the experience. I hope you have the intention to buy laser welding machine friends help. Thank you
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