Direct diode laser and laser frit Fu

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Graph 1, the frit Fu that alloy of use copper tin finishs sleeve of pair of pump of hydraulic pressure steel. (picture origin: Fraunhofer IWS) add laser production skill with Yu Tian (the Fu that be like frit and agglomeration) , still be a relatively new technology, it is introduced at taking the place of 1970 first in industrial application, use at frit Fu valve and valve base. And one of the earliest production application are the auto industry that is in Japan, laser is used at the valve base of engine of frit Fu aluminium alloy, in order to improve performance of its wear-resisting caustic, save production cost at the same time. Heavy equipment industry of the United States also developed a few application subsequently. In acting 1980 evening, company of general benefit engine (Pratt&Whitney) with General Electric Company (GE) begin to use technology of laser frit Fu, use at the maintenance of dish form lamina. The rapid development of equipment and pulverous material promoted new technology ceaseless and forward, make this kind of technology makes a standard in a lot of application, applied limits reachs figuration cutting tool from car cut, wait a moment to the wear-resisting surface of artesian well equipment. The material range that is added is very wide, have mould repair with Stellite alloy for instance, prevent with the pulverous implementation that contains wolfram steel wear away, and base metal powder is maintained and always make a part. Should speak of frit Fu, everybody the standard flow in brains is craft of pulverous fusion welding. According to the data that requires in application, frit Fu also should use powder of welding wire and rather than possibly, perhaps say fusion welding of and rather than of drill rod solder. In German heart tired this pausing Fraunhofer IWS research center, one is used at the technology that in steeliness pump sleeve copper of apparently direct deposit makes wear-resisting material to had been come out by development, be used at industrial application (see a picture 1) . Although frit Fu efficiency is achieved 9.

2 kilogram / hour, this craft still can maintain the consistency of frit Fu ply and outstanding metallographic feature, this the rectangular beam of light with same profit from and the nozzle setting after optimizing. However, most application uses technology of pulverous fusion welding, surmount conventional technology greatly, if plasma transfers arc (PTA) , because its provide some to low quantity of heat is inputted and be opposite,basically be of melt pool much better control, bring thereby fewer spare parts is out of shape and promote metallographic the result. Frit Fu applies the one pace in working normally to finish. After stimulating focusing of beam of light, in workpiece upper part moves, and offer pink right now implement carry powder melt district through a special nozzle. This nozzle is in pulverous deposit workpiece surface, subsequently its are stimulated instantly the quantity of heat of beam of light is fused. The nozzle of a lot of different figure differs according to what application asks normally and get use. Nozzle leaving an axis is one kind more economic choice, use in one-way flow normally. The nozzle leaving an axis of new development has more small-bore pulverous sprinkler head, promoted pulverous utilization rate, and volume is minorrer, facilitate enter the area that reachs hard. If frit Fu contrail can achieve the orbit of 2D or 3D, so coaxial nozzle will be optimal choice. They ensured the powder of pool of melt be affiliationed can get distributinging equably, do not suffer flow direction and the effect that machine head position. Special nozzle and treatment head had been come out by development, in the application that is used at be like ID frit Fu and Fu of broad line frit. Graph 2, Lasercarb is taken at wearing away by application. (photograph origin: Technogenia) applied brief introduction is drilled below directional well tool and all round edaphic contact, expose for a long time in tatty environment. Because drill,used earthly magnetic field to undertake guiding bringing, so drill string must be used non-magnetic material and craft. Wolfram steel alloy is the optimal data that is used at application of this frit Fu. The resembles bitumen at the action of wolfram steel Yu Lu area of coating is same. The different part that a lot of at wildcat using uses laser frit Fu to finish: Graph 2 showed Lasercarb coating is being worn away to take at by application, this will protect the joint of drill string. Stabilizer is used at carrying drill string photograph the position to bore, it is structure of 3D wing shape normally, such soil and cooling fluid can be passed from which. The intelligent component of drill string includes to send feeling unit costlily, be like aerial, bundle cover and fluid segregator, undertook laser case hardening. Laser technology suits to be used at repair tool and prolong its service life very much, use other technology to be as high as 6 relatively times. Graph 3, the filter of papermaking industry uses Lasercarb WC coating. (photograph origin: Technogenia) the paper mill is in what differ another times level uses coating of wolfram steel alloy to fight wear away the industry of function. In craft most begin smash level, lumber is smashed to be small shiver. Wood pulp mixes with water photograph, pass high pressure subsequently, be pushed a series of essence are fineness thinness mesh with rarefied pulp. Arrived final step, pulp is on giant dehydration snail column by stoving. Pulp is compressed by exterior mesh, squeeze among them moisture come out. The appearance of enormous pressure and grain makes in this one operation the spare parts wears away very big. Laser technology increases coating accurately for filter and mesh, this makes it makes this application in the most charming with the technology that provides cost efficiency most. Graph 3 those who reveal is a filter of coating of wolfram steel alloy that is used at papermaking industry. The taphole that is used at metallurgy furnace is on heat-resisting and wear-resisting injury having special demand. In the flow that make temper with fire, taphole by the clay of crowded melt down. After smelt is finished, taphole is gotten by plug, release among them liquid state iron. One gives aperture to need normally two finish to 3 broach, basically chafe because of clay muscularity and special when standing by iron of in-house liquid state heat. The technology of custom-built laser frit Fu that provides laser of 4 KW semiconductor through using a kind, need a broach to be able to complete every treatment that gives opening only, right now FeCrV15Ni7 is used at regarding frit Fu as powder. Gotten coat is careful vanadium alloy sedimentary, make coating has outstanding wear-resisting character, enough resists the attrition force of clay, have the heat-resisting character that comparative (see a picture 4) . Graph 4, the case hardening of taphole. This coating used technology of vanadium alloy precipitation, in order to promote wear-resisting property. (photograph origin: Fraunhofer IWS) the laser that is used at frit Fu is general, the laser that is used at frit Fu craft is CO2 laser, the supreme power laser that because it is the earliest when Fu of frit of research and development applies,uses. However, as a result of its wavelengh and facula dimension, the new generation laser that their appeal photograph compares close infra-red extent somewhat abate, be like Nd:YAG laser, disc laser, fiber-optic laser and direct diode laser. Contrast considers to show, the flow efficiency of CO2 laser is mixed only the half close of the laser efficiency near wavelengh of 1 M of close infra-red area. Say simply, the CO2 laser that means a 5kW is OK be replaced by the semiconductor laser of a 3kW. When choosing laser, below circumstance of size of different focusing facula, can get appearance of same beam of light is another main consideration factor. The gauss of laser of quality of tall beam of light distributings and heat, can put in deviate sometimes, produce adverse effect to frit Fu craft thereby. Laser should with correct means focusing, facula size moderate, and flat-roofed beam of light. For example, disc laser and fiber-optic laser are used at machining very elaborate structure, in application of medical treatment equipment, dimension of its facula feature sometimes can small arrive tens of micron. To a lot of frit Fu application, semiconductor laser has been become those who replace CO2 laser is brand-new industry impetus. They are flat-roofed appearance of beam of light allows his to be able to implement custom-built technology in order to obtain the uniform coating of high quality. Supreme power can amount to 10kW, make its relatively traditional the deposit rate with craft higher implementation, fiber-optic diameter is small to 300 micron, make ID frit Fu and area of turbine lamina maintenance can amount to second millimeter class. Through using laser of fiber-optic coupling semiconductor, the basis uses a requirement, can use mechanical arm or the athletic system that are based on CNC. Evidence shows, the important manufacturer of frit Fu nozzle people (include ID spray head inside) had adopted semiconductor laser. Although laser frit Fu ability is arisen before long, but the technology that it has been a maturity, through alive bound each district of a lot of disparate industries use, new laser and material expanded the application of new coat is attrib border, replace traditional technique ceaselessly. CNC Milling CNC Machining