The cut of machine of cut of numerical control blaze that is the oxygen alkyne blaze that burns gas to have metallic stuff with acetylene and solder, it is a conventional technology. It has blaze temperature tall, cut, solder rate is rapid, craft is mature, mode of operation is familiar with to operate personnel place actually wait for an advantage, also have cost at the same time tall, pollution is big, unit process of cargo bandling is medium easy happening the defect such as temper, and the explosion limit range that acetylene enrages is wide, operation danger sex is bigger, the demand that works to safety is high, so people is seeking other ceaselessly light gas to replace acetylene gas. Machine of commonly used cut of numerical control blaze lights gas to basically propane, propylene, butane, firedamp, liquefied petroleum gas waits, to these hydrocarbon kind burn gas, its explosion limit relatively acetylene range is narrow, sex of safety in operation is consequently taller. But on the other hand, these blaze transmission speed that burn gas are slower, blaze temperature also relatively acetylene is low, in using a process actually, compare with acetylene gas phase, there is certain difference in the meeting on function and mode of operation. Accuse blaze cut machine to light gas to be used at cut metal with propylene be valid, workpiece is burned not easily collapse, cut is smooth level off, hang broken bits little Yi Qing to divide. When cut, compare with acetylene photograph, warm-up time is a bit long, but cut speed and acetylene comparative. In addition, propylene enrages cost low free from contamination, use convenient on the safe side. Accordingly, in metallic cut, already more and more use propylene to burn gas widely. But, compare with acetylene photograph, the blaze temperature that propylene burns gas is inferior, blaze transmission rate is not high, improve blaze to transmit speed, it is the key that propylene lights gas to be able to replace acetylene to burn gas in the round. One, experiment 1, experimental design is industrial light gas to have a common characteristic, namely all lighting gas needs to oxygen will promote combustion, one kind applies to solder the following property must have when lighting gas to burn inside oxygen: (1) blaze temperature is high. (Rate of 2) blaze transmission is high. (3) has enough calorific value. (The chemical reaction of 4) blaze and mother capable person and fill metal is least. In gas is burned practically on industry, acetylene gas satisfied afore-mentioned all requirements well, other a few burn gas, be like propylene, propane, natural gas and a few special gas that are a foundation with these gas are had enough high blaze temperature, but rate of its blaze transmission is low, when effective transmission rate is being formed as high as the scale that burns gas to enough in oxygen, the oxidisability of these gas is too strong [1] . Accordingly, we to make oxygen - propylene blaze can be used at soldering, basically be to should raise its blaze temperature, improve the transmission speed of blaze, should avoid to bring about the excessive oxidation of workpiece and stuff stuff because of the excessive of oxygen at the same time, the influence solders quality. From concerned document [2, 3] can know, a few contain oxygen organic matter can serve as oxygen - the combustion activator of propylene blaze, can raise the transmission rate of blaze. This research is in add contain oxygen the organic matter combustion with promoting blaze respect, basically use mellow, aether, ketone to wait organic contain oxidation to close matter. Still need a consideration in recipe design process its and advocate light the consistence between gas, volatile when waiting for an element, still need to add the auxiliary constituent such as agent of partial oxidant, vaporization, stabilizing agent. To recipe research, basically will undertake with the following parts: (1) advocate burn gas: Propylene. (2) combustion activator. (3) vaporization agent. (4) blaze transmits speed accelerant. (5) aids solvent or deliquescent stabilizing agent. Also but according to actual condition, above of additions and deletions comes two constituent, have the opinion of recipe actor bad as bougie with blaze temperature. 2, the instrument that temperature measures temperature to measure place to use is Shanghai automation appearance the WGJ-01 that 3 factories produce accurate and optical pyrometer, span is 900 ～ 3200 ℃ . 3, the measurement of recipe experiment and its blaze temperature recipe one: Activator of combustion activator, oxidation and deliquescent stabilizing agent are added in this recipe, and can make these liquid state additive even the vaporization agent of pulverization, whole additive is measured for 10% . Recipe 2: Additive of the alcohol that can raise blaze to transmit speed, aether basically was added in this recipe, add a capacity for 6% ; Recipe 3: Additive of mellow, ketone is joined to add the vaporization agent of certain amount in this recipe, add gross for 7% ; Recipe 4: This recipe joins mellow, aether, use at raising blaze to transmit speed, add oxidizer and vaporization agent, add gross for 10% . Nextpage2, experiment and result test 1, cut experiment uses G01-30 oxygen - acetylene cutting torch, special wintersweet oxygen - propylene cuts the mouth, the armor plate that is 6 ～ 50mm to ply had test of cut of machine of cut of numerical control blaze, with oxygen - acetylene blaze photograph is compared, time of the warm-up when cut is a bit long, and require larger oxygen amount, but after entering regular cut, can move small oxygen amount again. Quality of cut of machine of cut of numerical control blaze should compare oxygen - of acetylene blaze good, basically be cut smooth level off, hang broken bits to keep clear of little and easily. 2, solder the experiment uses H01-6A oxygen - acetylene welding fire, mouth of special wintersweet solder, welding wire uses the 08Mn2Si welding wire that contains deoxidizer. It is to ply respectively 2, 3, the mild steel of 6mm board make counting accusing blaze cut machine to solder experiment, 3, soldering mechanical function checks (the A3 name board that experiment of 1) cold turn uses ply to be 3mm, light gas and the recipe that added additive with acetylene respectively 4 propylene light gas welding to receive, welding rod model is 08Mn2Si, cut into parts by standard of cold curved experiment cut 5 same sample. 180 ° cold turn curves sample to experiment to make clear as a result when the experiment, with the sample that acetylene welding receives, 180 ° bend in the classics below experiment condition and do not have breach, what do a test 5 times all qualification, and the sample that lights gas welding to receive with the propylene that added additive, 3 experiments are only eligible, show what place bending strength solders than acetylene to its solder a bit poor. (2) tensile strength experiment uses ply to be the A3 name board of 2mm, light gas and recipe with acetylene respectively 4 propylene light gas welding to receive, use plain top to solder, welding rod model is 08Mn2Si, by tensile strength experiment standard is cut into parts cut 4 same sample, 3, the analysis is theoretic as a result, acetylene burns completely equation of usable and undermentioned chemical reaction expresses: C2H2+2. 2CO2+H2O+1344kJ/mol of 5O2 ─ → but actually combustion is to divide a phase to undertake, reaction happens in blaze inside area (blaze heart) inside, as a result of,the quantity of heat that this one reaction emits and formation high temperature are of acetylene decompose, and decompose the carbon that go out local oxidize and arise. The scale when the ejective gas in nozzle of fire of solder of machine of cut of numerical control blaze if what afore-mentioned reaction equation show it is 1 ∶ in that way 1 when, reaction forms typical very bright blue blaze heart, this kind of quite young blaze generation goes out solder the combustion strength that needs when armor plate, this blaze calls neuter blaze. Because do not have superfluous carbon or oxygen to make metallic cementite or oxidation, the child after reaction is reproducibility actually, soldering is beneficial when steel. To oxygen - acetylene blaze, temperature of its neutral blaze is 3100 ℃ to control. In blaze outer, the carbon monoxide that reaction produces and hydrogen and all round the oxygen in atmosphere burns, form carbon dioxide and vapor, produce reaction 2 times namely, accordingly, to oxygen - for propylene blaze, although its 2175kJ/mol of total calorific value is more than oxygen - the 1344kJ/mol of total calorific value of acetylene blaze, but the calorific value as a result of one of second reaction and neuter blaze temperature are inferior, consequently, to soldering, solder especially when deeper work, oxygen - propylene blaze has certain drawback. Our experiment is passed the method that additive adds in gas is lighted in propylene of machine of cut of numerical control blaze, will increase its combustion total calorific value, raise blaze to transmit speed, achieve the goal that raises blaze temperature then. From the point of test result, after adding additive, blaze temperature has relatively substantially rise. The blaze temperature that determines with cutting torch especially (oxidizing flame) taller, applying at metallic cut, get very good cut result. Solder those who use is neuter blaze, and neuter blaze temperature greatly reaction of propylene of be enslaved to be enslaved to, although we are in recipe in 4 experiments, the propylene after adding additive lights temperature of gas neutral blaze to lighted gas to raise 110 ℃ than pure propylene, amount to 2980 ℃ , but 3100 ℃ photograph compares temperature of as neuter as acetylene blaze, still have bigger difference. 4, conclusion 1, light gas phase to compare with pure propylene, add different additive the following propylene burns gas its blaze temperature all has rise apparently, temperature can raise 30 ～ 220 ℃ . 2, because add additive,the following propylene burns gas, temperature of blaze of machine of cut of blaze of its numerical control gets rising, especially oxidizing flame temperature, accordingly, apply at metallic cut, have bigger improvement, basically was to shorten warm-up time, raised cut rate, improved the quality of cut, and was reduced light gas dosage. 3, the propylene after adding additive burns gas, temperature of blaze of neutral of machine of cut of blaze of its numerical control also has bigger rise. Accordingly, can be used at the mild steel under 6mm and the metal such as aluminous, copper solder, solder quality is better. CNC Milling
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