Because aluminium reachs aluminium alloy to have taller thermal conductivity and thermal capacity, be in especially big ply of board aluminium generatrix in soldering, no matter use solder of arc of acetylene welding of welding rod arc welding, oxygen, carbon or TIG solder to wait,solder the method makes its local heating fused it is more difficult to undertake soldering, solder quality assures not easily also. Aluminous generatrix group to soldering the form is like a graph show 1 times. In construction of extend of company of some large aluminium estate, from the operation craft, solder the respect such as quality, safe production and environmental protection measure undertook science is proved, via experimenting for many times, used concentration of electric arc quantity of heat successfully, solder penetration is strong, deep to frit of mother capable person big, productivity is tall semi-automatic extremely fused argon arc solder (MIG solder) , obtained favorable result, formed this labor law for this. 1. Labor law characteristic is versed in because thermal conductivity is tall,the crucial technology of the law solves aluminous itself namely originally, do not have groove in a side of big ply aluminous generatrix especially (primitive establish a range) wait for what the element causes to solder contact incomplete fusion or fusion are undesirable reach the blemish such as air hole, use MIG solder method, assure to solder the technology measure of quality. Its means of settlement is, according to the actual condition of aluminous generatrix connect, undertake MIG solder for many times solder experiment, through be opposite test specimen has macroscopical metallographic and mechanical property (bend) check test testimony, final summary goes out to solder suitably parameter and technology measure, coached the solder deliver a child of the spot is produced successfully, assured to solder quality and construction speed, be versed in originally at the same time law and other solder methodological photograph has the following characteristic than returning. (Quantity of heat of 1)MIG solder electric arc is centered, can use big electricity, have bigger penetration, deep to the frit of mother capable person big, the workpiece before solder does not need warm-up commonly, the can effective generation that prevents the weld defects such as incomplete fusion, stoma. (2) welding wire is fused rate is high, productivity rises apparently. (3) Ming Hu solders, solder bath clarity is visible, control bath appearance easily, welding line figuration is beautiful. (Because 4) solders electric arc falls in inert gase protection, bath is clean and bright, foreign matter is little, solder quality gets more easily assuring. (5) solders handlers work requirement gets ameliorative apparently. 2. Is suitable scope versed in the law applies to aluminous generatrix and ply originally 6? ≥ 4mm aluminium and aluminium alloy board shape and the butt welding of material tubal account, the filling solder that also applies to aluminium and blemish of aluminium alloy cast at the same time is repaired. 3. Solder of craft principle MIG is to use solid core welding wire, in inert gase (the method of a kind of arc welding that has below Ar) protection, this method is adopted solder suitably parameter, undertake semi-automatic solder deliver a child produce to aluminous generatrix, assure to solder with craft quality, easy occurrence fusion is undesirable, stomatic when overcoming aluminium alloy to solder wait for blemish, it is one kind solders aluminium and aluminium alloy are better solder method. 4. Construction flow and operation point (1) construction technological process is aluminous board groove preparation clears weld zone region (chemical law, rigid standard) to one render solder one group one fill solder builds face solder one machinery is ground smooth (emery wheel) . (① of the preparation before 2) solder clears groove and groove each 60mm handles two side, purify corrupt earth, smeary, moisture and alumina film. ② level up be answeringed by solder workpiece, mat it is firm, good to be made be out of shape instead. Nextpage (3) group is reached to groove of as aluminous as tack welding ① generatrix group if pursue,show 2 times to the form. The bottom when ② ground floor joins board group is opposite should have bolster plate, bolster plate material uses pure copper or stainless steel board advisable, its appearance is shown 3 times like the graph. (When 4) operates a point to apply solder, should use " left solder law " advisable. This kind solders effect of methodological gas protection is good, apply to big ply aluminium board, deep groove solders, its advantage is to solder the nozzle when the operation does not block the line of sight, bath clarity is visible, solder two side do not produce included angle, fusion is good, welding line figuration is gently and even, beautiful, if pursue,4 are shown. ① solder sorrowfuls (welding wire) angle. Of welding wire pointing to the position and angle is quantity of heat of sufficient play electric arc, assure thick aluminium board the key with a side good fusion (3) seeing a picture. Drop of frit of ② MIG solder transfers formal choice. Drop of MIG solder frit transfers the form of the form that chooses to use efflux to transfer, the frit drop of it and other form transfers to be compared, have had soldered to cross a process firmer. (6) applies solder ① to be in assure thick aluminium board below the case with a side good fusion, welding torch (welding wire) with linear or delimit Xiaoguo moves ahead, solder rate is appropriate some faster. Essentials: Solder path wants layer of fine, solder thin, before control bath appearance, fused aluminous bits must not surmount welding wire, otherwise thick aluminium board a side will appear incomplete fusion, solder two side included angle passes to wait for blemish greatly. When ② extinguish arc, when welding wire motion arrives groove brim, welding wire should answer solder 20mm left and right sides, prevent to produce arc hole, at the same time welding torch also cannot be raised immediately, should make lag argon qigong can continue to protect have not completely caky bath is avoided suffer airy to invade, prevent to produce air hole. Every connect wants ③ successive solder is over, midway does not get standstill, because solder temperature is higher, solder the process is more successful, solder quality can assure more. (7) note ① outdoor solder exercise, due and good windbreak step. ② is thick of aluminium board solder, amount of welding line fill is large, solder temperature is high, due prevent be out of shape measure (choose be out of shape instead or rigid fastening law all but) . ③ builds wiring to contact weldment position to want proper, firm, in case abrade is aluminous board the surface, affect solder the stable combustion of electric arc. ④ applies solder in, should notice to prevent to solder temperature is high and burned-out nozzle, electric mouth (nozzle, electric mouth serves as fragile a) . ⑤ every time the extinguish arc, frit ball that makes arc Shi Yingxian carry welding wire the head again is cut off, make sure welding wire extends long <20mm. ⑥ solders in do not get oscillatory work. (8) after weld defects and solder of solder aftertreatment aluminous generatrix are over, repair welding line surface grind level off, must not have arc hole, cave owe the blemish such as the flesh, with 5 times magnifier the examination must not have the drawback such as stoma of crackle, incomplete fusion, concentrated sex. Nextpage 5. Material and equipment (the mechanical property that place of ① of 1) aluminous material uses aluminous material and chemical composition must accord with the relevant specification with active country. ② place must have with aluminous material leave factory qualitative book of certificate of approval and material, accord with project technology requirement. What ③ makes good spot aluminous material is custodial make with hair knock off. (2) solders material ① place must have with aluminous welding wire leave factory qualitative book of certificate of approval and material. ② place uses aluminous welding wire to must match with photograph be pledginged by solder aluminous material. ③ argon enrages aeriform purity to answer > 99. 95% . ④ place uses gas of welding wire, argon to wait solder material must be used by the regulation with custodial. (3) equipment is semi-automatic extremely fused argon arc welding machine (gas cylinder of 500A) , device sending silk, welding torch, argon and argon throughput plan wait. Horn is brushed to emery wheel, stainless steel silk, the working state that should keep the tool such as sledge and spanner in good condition. 6. Quality is controlled (construction of engineering of steel structure of 1) normative level and quality check and accept normative GB 50205, 2001. Cheng construction reachs welder of conduit of spot equipment, industry check and accept normative GB50236, 1998. Aluminium and GB 10858 of aluminium alloy welding wire, 1989. Aluminous generatrix solders construction and check and accept normative Js 5417, 1 995. Electroanalysis the car asks bus makes installation technology regulations (designing institute of Guiyang aluminium magnesium, 2001) . Steel structure welder CwTA of regulations of exam of Cheng solderer technology, 2002, GH, 1. Shanxi saves a building to divide a project procedure, (Welder Cheng advance builds mark word (1992)148 date) . Building steel structure solders technical regulations, JGJ81, 2002, j218, 2002. (2) quality makes sure measure ① undertakes administrative by Is()9002 standard mode, the quality that carries out head office strictly assures manual and program document. ② makes clear duty of quality of each working procedure, layer upon layer guard a pass, fulfil a person. ③ solders personnel, qualitative check personnel must hold card mount guard. ④ makes good welder art assess, solder certainly parameter. ⑤ solders strictly quality, place solder welding line is pointing to to solder represents on emplacement: [steel seal mark. 7. Safety precaution spot solders, construction personnel is divided should carry out a country strictly active " emergency decree of barnyard grass of building installation labour " and outside measure of technology of spot concerned security and regulation, emphasize the following especially: (1)MIG solder ray radiation stronger, aerosol is bigger, the personnel that apply solder should notice labor installs an umbrella more preventive measure. (2) changes welder power source should be shut when electric mouth. (3) deploys the electrician with better technology to maintain staff. 8. Measure of construction environmental protection (1) is mixed according to the country place (industry) the environmental protection index that asks in compasses of concerned law of environmental protection and my company keep notebook character, build environmental management system, make environmental target, prevent pollution, energy-saving decrease useless, realize the harmony of construction and environment, achieve the requirement of environmental administration level. (Measure of 2) main government is held every weeks " construction site environmental protection " working regular meeting, the construction site environmental protection of before summary one phase supervises a case, the construction site environmental protection that decorates below one level supervises the work. Organize the test of association that joins by civilized construction and controller of environmental protection administration every weeks, to the problem that discovers in the examination, according to particular case, calm time, calm person, calm measure gives solve. (Source and main contaminant basically are polluted in 3) construction ① waste gas, basically solder to build construction rubbish to reach the soot of the generation in the process. ② ray radiation, basically be the electric arc light in soldering. ③ noise, basically pollute the use of the noise that the source produces to solder and mechanical equipment. ④ solid litter, basically be solder aluminium board reachs a head of remnant welding wire, cut grind the aluminous bits powder that makes groove place generation to wait. (① of 4) concrete step prevents air pollution: Solder to main pollution the processing of soot is used local and ventilated give priority to, comprehensive and ventilated for complementary method, strengthen an individual to defend, improve the pollution of work environment with this. ② prevents smooth pollution: Spot illume centers illuminate, cover spot range only. In construction the setting keeps apart canopy all round area, the segregation of electric arc light of the generation in making solder is inside construction area. ③ prevents construction noise pollution: Construction site encourages civilized construction, build the administrative system that controls man-made noise soundly. The noise of construction site is mechanical (wait like dig of pneumatics machine, electric welder, electric arc, grinder) the segregation canopy that wants a setting to close, with reducing noise diffuse. ④ solid litter manages: Construction rubbish uses container swing, forbidden and optional throw away. Construction site establishs special litter to store temporarily field. Regular volume towel collects manufacturing process litter, the unit that sends construction unit approval or place have offer of processing, disappear. 9. Benefit analysis is versed in originally law with its he solders methodological photograph is compared, accelerated solder speed, shortened time limit for a project, heighten effect 3 ～ 4 times, place solder generatrix solders quality is good, conductivity is tall, resistance is low, managing cost 26. 5 ％ above. "MIG solder in big ply aluminium board solders the application that go up " obtain Shanxi to visit a worker 100 technologies difficult problem tackles key problem outstanding achievement award. This labor law is a kind of efficient and high grade welder art method, of this law carry out gained good economic benefits and social benefit for the enterprise. CNC Milling
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