500W Handheld Optical Fiber Coupling Laser Welding Machine

Advertising metal Letter Laser Welding Machine:
Technical parametersModelRY300WLaser working substanceNd3+:YAG Laser power300W
Max. single-pulse energy90JTotal power9KWLaser wavelength1064nmSpot diameterф0.10-3.0mm adjustable()Pulse width0.2-20ms adjustable()Pulse frequency1-100HZ adjustable()Weldingdepth≤1.2mmWorking table size750*1000mmZZ=75mmControlSingle-chip microprocessorObserving systemCCDFocal length200mmCooling systemWater chiller Power supplyAC 220V±10%/50HZ
Application:
Applied for the welding of various metal letters, LED illuminated letters, customized metal signage, and exterior billboards.Welding Materials:
Stainless steel, carbon steel, titanium, auminum, galvanized sheet, gold, silver and brass, etcFeatures:
1. CCD,High defenition CCD camera for observing, convenient for adjusting laser spot and spot location
2. Adopt red light indication, realizing fast laser location and welding
3.360 degree rotatable laser head, convenient especially for welding profiled materials
4.U-shaped hole designed for micro posioning, convenient for quick weld zone location,with positioning rod, no need for adjustment of laser head when welding at small corners
5.Cavity can be dragged forwards or backwards, convenient for big and small letter welding
6. Adopt marble table, ensuring that the shining materials do not scratch.Overall structures and maintenanceThe integral machine is composed of five parts, namely, the control cabinet, cooling system, power cabinet, laser and optics processing system.
The equipment can also be divided into five parts in terms of functions, which are:
1)Lasersource;
2)Laser power supply;
3)Optics system;
4)Controlling system;
5)Cooling system.
The laser is a device that converts the electrical energy into the laser energy. This machine employs Nd3+:YAG Laser, consisting of the following parts:
a) Pumping lamp: it converts the electrical energy into the optical energy that can activate the substances for laser processing. The machine adopts pulse xenon lamp with repetition rate of XMC7-125. Both the electrode and quartz glass tube surface need to be cooled during working.
b) Laser crystal: it converts the optical energy into the laser energy. This machine employs the crystal ф8*145mm Nd3+: YAG as its working substance.
Condensing cavity: it focuses the light from the pumping lamp onto the working materials.
The optical resonant cavitycan provide optical feedback, allowing the laser to be magnified to form high strength laser for output. This machine employs the plane and parallel cavity made up of flat mirrors with ceramics as its medium. The full reflector's transmitis less than 0.4%, output reflecting mirror's transmitis 85%.
Other parts: high voltage electrode, insulation base plate, positioning bracket, adjustable diaphragm frame and laser holder.
As the machine is highly precise equipment whose discharging features the high pulse voltage and charging features the large capacity, and the laser focusing energy is highly centralized, the operators must obtain professional knowledge and skills before they work on the machine.
Optical resonant cavity
The two medium diaphragms of optical resonant cavity are absolutely parallel to the laser bar's end face, touching or random adjustment is not allowed. Do not open the outer hood of the laser randomly and keep the optics surface highly clean. Otherwise, the high-energy laser will damage the diaphragm layer. When the laser output energy is lowered down, the operator should first check whether the medium diaphragm is clean. If any dirt, he can use lens paper or cotton wool moistened by the cleaning agent (liquid mixture with ethanol absolute and ethanol respectively occupying 50%, the same when mentioned in the following part) to clean it gently. Then check the resonant cavity to see if it is misadjusted. Cooling system
The laser has one water inlet pipe and one outlet pipe, respectively connected to the cooling channels of the lamp and bar. Hardwater flow at any part will cause large loss. Each time when the equipment is assembled, the operator should check the water flow at each path and make sure no fault exists before starting up the laser. Xenon lamp replacement
The average service time of the pulse xenon lamp is 108 times of blinking if it works under its rated power and belongs to the consumptive pieces. To ensure the normal performance of the machine, the lamp must be replaced when it has reached its rated blinking times (about 108 times) and the energy becomes low.
In cases that the xenon lamp is damaged or its service time is shorted due to other causes (for example, it can't pre-illuminate or no energy output is available when the voltage is increased to 500V), the xenon lamp should also be replaced.
As the strength of the sealing at the lamp's two ends is relatively low and apt to being damaged, special caution should be offered when substituting the lamp. The following procedures should be followed:
Turn off the machine, cut off the water supply and discharge the remaining electricity on the energy-storage capacitor;
Remove the electrodes of lamp;
Remove the gland of lamp, carefully pull out the lamp from the side of the full reflector;
Use cotton moistened by cleaning agent to clean the sleeving
Check to see if the appearance, size and other aspects of the new lamp is conforming;
Install the new lamp into the chamber, press the gland tight and mount the electrodes;
Connect to the water supply and check the sealing of each part to see if they are reliable;
Turn on the main power to check whether the lamp can discharge normally;
Try single spot operation, check whether the output energy of laser meet the requirements. If the output is not ideal, repeatedly adjust the resonant cavity;
Cover the laser with outer hood. D.Nd3+:YAG crystal is the core part of the laser, and is fairly expensive. Therefore it should be installed with great care. The two end faces of Nd3+:YAG crystal bar is absolutely parallel to each other and has high cleanliness. If there is any pollutant on the end faces, the luminous efficiency will be lower, the facula mode will deteriorate, or even can't illuminate normally. In that case, the space housing this machine must be cleaned and professionals should be called for related treatment. Take out the Nd3+:YAG crystal bar, use lens paper or absorbent cotton moistened by cleaning agent (liquid mixture with ethanol solution and another respectively occupying 50 %,) to remove the dirt gently. The causes leading to the damage of crystal bar can be described as follows:
The flow of cooling water is over or interrupted, the energy input into the lamp makes the lamp and bar overheated, which results in the cracking of the lamp and bar;
The end face is bumped, scratched or even damaged by hard object;
As the diaphragm layer is polluted , the bar is damaged when the high strength laser passes by;
The bar is pressed too tightly or the applied force is uneven when it is installed, the over high interior stress breaks the bar. In this case, the operator should not open the hood of the laser, nor operate the YAG bar. If the end face is found polluted, professionals should be called for the related treatment. E.The condensing cavity doesn't need maintenance work. Normally, it is not allowed to dismantle the condensing cavity. F. Over voltage protection
There are three kinds of voltage applied to the pulse xenon lamp in succession, namely, trigger voltage about 13-18 kv, pre-burning open-circuit voltage 1500-1800 v and arc-discharge voltage about 500-2500 v. Therefore, the lamp electrode should not get too close to other metal objects, and a distance of more than 15mm should be kept. The insulation panel's surface should be kept dry and clean so as to avoid pollutions which may lower down the insulation performance to bring short circuit.