What apply as laser is increasingly patulous, laser solders to also receive a measure in the solder that replaces a tradition gradually. The laser that stainless steel of article put up with is in charge of solders to take over Duan Jin to be compared all right with all sorts of solder, spread out discuss. The last few years, because people pays close attention to environmental problem more and more, increasing fuel efficiency respect, the pressure that car manufacturer gets increases increasingly. The code with stronger sex of more strict, tie is produced to industry and material treatment brought the challenge on the technology. Those who lower waste gas include to discharge in these trends, automobile body is lighter, and the service life that prolongs a spare parts. Material machines the progress of the respect to was in charge of manufacturing domain to bring unique opportunity for stainless steel. Specific for, people asks to produce business to produce such part, they must have lighter weight, but still must have anticorrosion characteristic, and satisfy intensity requirement. In addition, the dimensional limitation of automobile body emphasized more but the importance of figuration sex. Typical application included valve of vent-pipe, fuel, atomizer and other component. When manufacturing stainless steel is in charge of, first the metal strip with flat figuration, make subsequently state of the canal that it is a circle is formed outside its. Once after figuration, the juncture of pipe must be received one case by solder. This welding line affected a part greatly but figuration sex. Accordingly, if want to get what can satisfy the strict test inside manufacturing industry to ask,solder appearance, the choice solders suitably the technique is very main. Without commonplace doubt, tungsten pole gas protects arc welding (GTAW) , high frequency (HF) solder, and laser solders to had been been in charge of in stainless steel in making, got applied severally. Solder of high frequency induction is in traditional arc solder in solder of high frequency contact and solder of high frequency induction, the equipment that supplies electricity and the equipment that supply extruding force are mutual independence. In addition, two kinds of methods can use magnetism stick, it is soft magnetic component, by park body interior, it conduces to gather together in metal strip brim solder stream. Below these two kinds of circumstances, after metal strip is cleared by cut, be furled, send solder contact next. Additional, to heating the induction coil that uses in the process undertakes cooling used refrigerant. Finally, a few refrigerant will be used at extruding process. Here, in the action on extruding pulley very great power, arise in order to avoid in weld zone region porous; However, used larger extruding force to will bring about burr (or solder bead) grow in quantity. Accordingly, the cutting tool of special design is used to cleared pipe interior and external burr. High frequency solder one of main advantages of the process are, it can undertake to steel tube high speed is machined. However, the typical situation that exists in forge welding of major firm photograph is, high frequency if soldering contact uses traditional nondestructive technology (NDT) have reliable test not easily. Solder interstitial likelihood appears in the smooth small area of low intensity joint, method of this kind of interstitial use tradition cannot detect come out, lack dependability possibly in the car application of a few high demands consequently. Tungsten pole gas protects arc welding (GTAW) will look on the tradition, steel tube manufacturer chooses will tungsten pole gas protects arc welding (GTAW) finish solder process. GTAW is not consumptive tungsten in two arc of an electric welding arose between electrode. In the meantime, guide from inside spray gun laziness protects gas, with screen electrode, generation the plasma of electric ionization flows, and the solder pool with fused protection. This is already establish, the process that already was understood by people, it solders what can repeat the high quality that finish process. The advantage of this one craft depends on but repeatability, solder the process does not have slop content, and was eliminated porous. GTAW is considered as the process that a telex guides, so, opposite for, the process is slower. Pulse of high frequency electric arc in recent years, GTAW solders power source, call high speed switch again, make electric arc pulse exceeds 10, 000Hz. The client of steel tube processing factory most first benefit from benefit from this one new technology, photograph comparing of the pressure that pulse of high frequency electric arc caused electric arc to be down and traditional GTAW became big fivefold. What bring have representative improvement character still includes: Bursting strength is raised, solder wiring rate is rapidder, reject decreases. The client of steel tube manufacturer discovers very quickly, this solders craft gets solder the appearance needs to reduce. In addition, solder speed is relative still slower. Laser solders in all steel tube in application, the brim of metal strip is fused, when squashing steel tube brim when use clamp bracket, brim happening is caky. However, say to fetch of laser beam welding, peculiar quality is the density of beam of light that it has high-energy amount. Laser light beam fused not only the surface layer of material, still produced aperture of a spoon, appearance of down to welding line is very narrow. Power density the word under 1MW/cm2, be like GTAW technology, cannot produce enough energy density in order to produce spoon aperture. Such, solder without what the craft of spoon aperture gets the appearance is wide and shallow. The high accuracy that laser beam welding receives was brought more efficient penetrable, this reduced grain to grow again, bring better metallographic quality; On the other hand, taller heat energy input and slower cooling process brought about GTAW to solder coarsely structure. Normally for, people thinks laser beam welding receives a process faster than GTAW, they have same percent defective, and former the metallographic with be brought better is characteristic, this was brought higher bursting strength and taller but figuration sex. When with high frequency when soldering to be compared, process of material of laser beam machining does not occur oxidation, this makes percent defective lower, but figuration sex is taller. The influence of facula dimension solders in what stainless steel runs a plant in, solder deepness is decided by the ply of steel tube. Such, goal of production solders through reducing namely width will rise but figuration sex, achieve higher rate at the same time. When choosing the most appropriate laser, people cannot consider quality of beam of light only, still must consider make friends to be in charge of the accuracy of machine. In addition, machine of make friends canal acts well to still must consider to reduce the restriction that gets when facula first before in the error on dimension. In steel tube the question on the peculiar dimension in soldering is very much, however, affecting soldering main factor is, soldering box (more specific say, it is to solder roll) the juncture that go up. When once metal strip passes form cutting to prepare to undertake,soldering, of welding line special a note of the ancient Chinese five-tone scale included: Metal strip clearance, serious / solder slightly the change of central line of amlposition, welding line. Clearance decided to want to form solder pool with how many material. Pressure too the general brings about steel tube coping or internal diameter material is superfluous. On the other hand, serious slight perhaps solder amlposition can be brought about solder appearance not beautiful. In addition, the course solders after the box, steel tube general by farther nap. This included dimension to adjust with appearance (appearance) the adjustment that go up. On the other hand, additional work can purify a few serious / slight weld defects, but the likelihood cannot keep clear of entirely. Of course, we hope to realize 0 flaw. Generally speaking, experience law is weld defects does not exceed 5% of material ply. Exceed this numerical value, solder the influence the intensity of the product. The steel tube product that laser beam welding accepts is final, soldering is very important for the production that the existence of central line manages to high quality stainless steel. Be opposite as car field can take seriously of figuration sex increasingly, to it direct and relevant is the hot influence area with less need (HAZ) , and reduce solder appearance. Conversely, this promotes the development of laser technology, improve quality of beam of light namely in order to reduce facula size. As facula dimension ceaseless decrescent, we need more attention the accuracy at scanning juncture central line. Generally speaking, steel tube makes chamber of commerce as far as possible reduce this deviation, but actually, should achieve 0. 2mm(0.
008 inches) deviation is very difficult. This brought use welding line to dog systematic need. Two the most general kinds dog the technology is mechanical scanning and laser scanning. On one hand, mechanical system used bougie to contact solder the juncture upper reaches of the pool, they can touch ash, wear away and oscillatory. The accuracy of these systems is 0.
25mm(0.
01 inches of) , it is not quite accurate that this says to the fetch of laser beam welding of quality of tall beam of light. On the other hand, laser welding line dogs the accuracy that can realize a need. Will tell commonly, laser beam or laser spot is projected be in welding line surface, gotten picture is gone to by feedback CMOS camera, this camera determines the position of welding line, wrong joint and clearance through algorithm. Although become,resembling speed is very important, but offerring necessary closed-loop control to move with be directly on juncture when laser focusing head, tracker of laser welding line must have enough the position that fast controller will come to to compile welding line accurately. Accordingly, the accuracy that welding line dogs is very important, and answer time as much important. As a whole, welding line dogs the technology has gotten developing adequately, also can allow steel tube manufactory to use more the laser of high quality bundle, a future life is produced but the stainless steel canal with figuration better sex. Accordingly, laser beam welding receives the ground that found use force, what it is used at reducing to solder is porous, reduce solder appearance, maintain at the same time or rise solder speed. Laser system, if diffuse cooling and attrib wattle laser, had improved quality of beam of light, solder through reducing width rises further but figuration sex. This development brought about the necessity that the stricter size control in steel tube factory and laser welding line dog. Such, mill of stainless steel pipe solders the successful hang on of the process is all and individual technical conformity, must regard it as so a whole system will treat. CNC Milling