Nicety casts the application in aerospace industry

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On the world, great majority nicety casts a factory to use method of high-pressured vapour dewax, this method is OK easily and quickly purify casts the wax-pattern inside carapace of model of pottery and porcelain. The article devotes oneself to to help a reader understand this technology, and inspect current trend and the development in the future. Fusible pattern is cast (Investment Casting) , dewax technology or craft (Lost Wax) , these are to use different technical term to describe same technology, go up in human history namely the oldest primitive craft form. Historical reviewing is before 5000, gu Ai and with the casting of beautiful Suobudamiya the technology can have been on the technology of the clay mould that shucks off beeswax model cast bronze medal. The material that makes original model is mix by beeswax be made as the fire of fuel with charcoal and become, this needs 3 measure: 1, flow after beeswax model is liquefacient; 2, the modular carapace of clay make it by agglomeration; 3, fused bronze ball from on runner mouth irrigates modular antrum. Be in not only middle east, the A Ci stage that is in Chinese Chinese generation and Mexico even overcomes person and current Benin and Nigeria, this process is well-known, perfect such method, use at making work of art, tool and weapon. Arrive all the time 19 centuries end, in American dentistry domain, because cast fusible pattern for the first time,the technology is used at tooth coronal and tooth to set body production, fusible pattern cast a process to experience leap of first time technology. It is about after 40 years, because traditional production method already cannot satisfy the requirement of the army again, fusible pattern cast a technology to become a new development way. After 1945, fusible pattern foundry technology is developed ceaselessly and adjust, use the batch production of series product. Fusible pattern casts a technology to always apply at the component with complex high accuracy, in order to reach amount of the smallest workpiece do poorly done work over again. Its material includes alloy of a lot of high melting point, be like titanium alloy and the alloy steel that are used at exact pattern. Accordingly, nicety casts the widest application to be made at golf head today, the medical treatment that makes with chromium and cobaltic alloy is artificial substitute, and the component production of industry of car, racing bicycle and aerospace industry. Can see, the nicety that developing flourishingly casts an industry, this is the beginning of a greater progress merely: Current fusible pattern coins newfangled term is " directional and caky " and " single crystal is caky " technology. The caky join material in the configuration that carries modular case and as special as heat treatment process, get a few parallel are only columnar the cast of brilliant. The cast that makes below best good position case is onefold grain is cast and become by, do not have or do not have crystal boundary almost, have higher mechanical performance and high temperature capability thereby. Mix in a lot of aircraft engine use at the lamina of gas turbine turbine that generate electricity to apply this technology to be able to make engine and gas turbine work efficiency reach unprecedented height. Although cast of the first single crystal has big toe to build size only, but the constant growth that single crystal cast asks -- the biggest now single crystal cast is about two feet long, still not be clear about the develops a result prospect of this exciting popular feeling at present. No matter high-pressured vapour dewax was 5000 before the birth goddess that makes with bronze or the aviation reaction engine that make compressor now with high temperature alloy, they remain same process on the principle: The mould is wax-pattern is made in candle, there is stuff of pottery and porcelain in the besmear on wax-pattern next model housing, the method that changes candle by frit again finally as far as possible easily purify wax-pattern. From show the dewax that burn a law, dipping process dewax, microwave law dewax, convection heating furnace (oven) use heat of the most general high-pressured vapour dewax to eye preexistence bound, all sorts of different wax-pattern techniques ever had appeared. Furnace of dewax of vapour of introductory high pressure will be emphasized below. Principle of furnace of high-pressured vapour dewax has been discovered a long time ago, can the France that restrospect to invented steamer and submarine 1674 Dennis? Handkerchief Pan. He realises in practice, the boiling point of water is with the environment pressure has immediate concern. If increase pressure, the boiling point that can cause water increases, be in 10 cling to pressure, the boiling point of water is 183 ℃ . Furnace of high-pressured vapour dewax applies this kind of principle just about, in order to obtain higher energy density. Until one day, a nicety casts practitioner to generate a good idea, ground of a strange combination of circumstances uses purify of vapour pressure boiler the candle of his model carapace, the technology is simple and this kind is effective. Such " steamer " include a few parts only, and because the high-energy quantity of water vapour is completely comfortable,close use at melting quickly wax-pattern. Graph furnace of dewax of vapour of 1 MK-180 high pressure process is to should have vapour generator above all, it is a boiler that adds half water, use electric equipment component to heat or the means of aeriform burner heats. Want to reach proper pressure and temperature only, open interface valve, in order to be close to 260 sonic meters / velocity of flow of saturated vapour of second, 183 ℃ , deliver the 2nd boiler that can hold two models shell. To improve efficiency, need warm-up empty place inside bravery boiler. Vapour generator is to be designed normally around boiler of the bravery inside the move, namely real pressure boiler. After pressure increases, the water vapour of high-energy quantity gathers on the mould inside furnace, deliver its quantity of heat wax-pattern instantly through modular carapace. Wax-pattern surface melts, candle comes out from the leak in modular carapace, partial candle pervades modular case in. What happen as a result of all all these is very fast, modular carapace won't form any crackle because of expanding. If parameter of a craft is incorrect, or pressure generation is too slow (or backwater) , furnace of high-pressured vapour dewax also can make percent defective rises quickly. Through 10-20 minute, boiler pressure is reduced because of opening another valve. Below good case, achieve environmental pressure when it, specific door can be opened by bolt of a bolt, take out the pattern of complete dewax. However the following element still needs a consideration: Not be mould of metal of the liquid state in casting a process the modular carapace to modular carapace is highest intensity, say exactly, it is very inconspicuous dewax (because of what lose sight of almost) process, most the wet intensity that allows the case of model of pottery and porcelain that poll is fond of, it decides to cast a success or fail thoroughly. Pressure of principle of excess pressure job has been jumped over higher. This simple principle uses process of furnace of high-pressured vapour dewax in, this means generation steam boiler should be enough big, so that can produce supersaturation vapour course easily. Regard an experience as law, the cubage of two boiler, namely pressure generator mixes vapour to lade actually the cubage of the reaction pressure boiler of dewax mould, should make an appointment with 1.

3: 1. Only such, ability assures to use the boiler of vapour fill sky, that is to say, below optimal condition vapour eject time is 4 seconds about. Be in every time when modular carapace uses dewax furnace dewax, because of frozen modular carapace face, can make vapour condensation becomes water, need more energy so. Because this is below good case, the pressure in vapour generator, should be more than 10 cling to, temperature should achieve 183 ℃ , arrive in order to ensure the greatest pressure can not be in inside 10 seconds time be full of furnace of high-pressured vapour dewax. Can assure saturated water vapour in this temperature only, this means air of a first-rate and water vapour to mix a balance to flow. At worst, when these numerical value drop, the happening that can bring about modular carapace crackle and the process of slow down dewax, waste the sources of energy. The vapour efficiency loss of convention of furnace of high-pressured vapour dewax handles defer of valve of furnace of dewax of vapour of process Nextpage high pressure to shut optimize efficiency vapour semmetry to import means not only vapour infuse speed is mixed to dewax result percent defective can produce tremendous effect. The importance of vapour entrance means also is one often is underestimated respect. Only normally a steam is imported, can make vapour air current diffuses quite asymmetry. Accordingly, set modular case in an as direct as vapour contact " case base " go up. Accordingly, good position is the pressure boiler that a vapour that covers both sides height enters the mouth, so that vapour can stabilize ground infuse quickly. Actually, this method is first-rate, of the aerodynamics apply can reduce percent defective greatly. Optimize vapour infuse means another recipe of the principle of job of vapour pressure boiler of newest generation carries in order to achieves first-rate vapour infuse namely. So far, in the process that uses a level, in the process in the begining, the door chains, there is 1 in reaction pressure boiler for example cling to standard air, pressure generator full is 8 Ba Shuizheng steam. Transfer through opening a powerful person, infuse of these 8 Ba Zheng steam arrive furnace of dewax of vapour of high-pressured high pressure, with 1 cling to air mixes, pressure decreases accordingly, reached finally 7 cling to effective vapour pressure. Use at present so called " defer closes valve " , in order to avoid this kind of efficiency reduce. A special control equipment allows to shut lag in exhaust valve 0.

1-1 second. Such, before vapour infuse is driving cold air to come out from exit of a powerful person, shut, build pressure. The advantage of this kind of switch is the intrigue of clearly: Inside saturated vapour no longer attenuant, but modular carapace gets " true " 8 cling to pressure, be equivalent to improving 12 ％ efficiency. Perfect decompression process but speed of vapour pressure intensity and infuse is not dewax process assure exclusively what gain a success, because although an incorrect decompression process is OK also,cause very big destruction to modular carapace. In this process, what we handle still is not the carapace of pottery and porcelain of agglomeration, not the modular case of agglomeration cannot stand any severe processing courses. If pressure is released suddenly, flake in what can cause modular case with the high speed air current between rudimental candle and the adherent force that permeate candle and produce micro-crack, disastrous result is created in the subsequently meeting in casting a process. Accordingly, be necessary to understand modular mec housing well-known " unripe egg " same, use a slow step-down process, namely the pressure of modular carapace reduces a process adagio equably. The number below makes clear what is pressure to reduce a process clearly: One liter 10 cling to saturated vapour is corresponding at often pressing vapour 1000 litres when, in releasing atmosphere normally when vapour - it can give out tremendous howl cry and fizz, because this must try,control. One common " blame intelligence " a powerful person is to cannot be used at such purpose, because serve as digital system to be accepted only " open " or " shut " command, intermediate position is impossible pilot. Below this kind of circumstance, need so called " intelligent valve " , this is one can adjust independently the intelligent a powerful person that pressure releases. Be pressed according to whether exceeding inside the time of set and open valve, release pressure. If pressure drops too fast, it can reduce pressure to release exit, vice versa. This kind monitors what be an unit with millisecond increment to adjust, because this assured the step-down form of free choice,along perfect accurate iteration means pressing falls. If still feel pressure drops rate is too rapid, can you choose inclined? ? Slope function. Valve undertakes shutting according to the quantum of time of free set, in order to maintain pressure constant. Decompression process is not to happen in a linear formal phase, happen in however " diagonal " level. At least very sensitive to pressure model carapace, this is another kind of milder processing kind, conduce to utmost ground reducing percent defective. The design of furnace of dewax of vapour of water treatment high pressure is periodic, below normal movement condition, want to exceed 200 thousand times only, enough and successive use about 25 years. It is however in actual use process, service life depends on a lot of elements, it is the quality requirement to water above all. Water is in whole process be joined ceaselessly and heat with energy, namely vapour of heat energy translate into. Because this kind of vapour basically is comprised by distilled water, and join contain underwater all other impurity (like lime and salt) it is precipitation on vapour generator, form knot dirty. If want to prevent heat of high high-pressured vapour dewax,one becomes in a very short time " calcification cave " (oxidation and knot dirty) , need to invest proper water treatment link. Its cent is 4 separate processing measure, 2 are in furnace of high-pressured vapour dewax is exterior with 2 interior in furnace of high-pressured vapour dewax. Water inlet deserves to have bate system, keep apart as far as possible a variety of mineral, wait like calcium carbonate, enter reservoir in order to prevent its. In the 2nd control loop is passed add alkalescent agent, detect and adjust the ionic content in water. If join water already was handled through appropriate, this pair of knot dirty that reduce boiler and heating element are very helpful. But, the knot dirty in boiler is impossible to avoid completely. Accordingly, must build appropriate water treatment facility. To achieve this goal, of water contain salt and calcic quantity to must detect continuously, once surmount some critical value, open installation to be in the blowdown a powerful person of boiler bottom, form an eddy, smash the knot dirties and sweep them. There is an electric probe in upside, set a limiting value, when water the medium quantity that contain salt reachs certain level, through controlling a powerful person and offtake the water eduction of will rich salt adds new fresh water. Through these 4 measure, ensure a perfect water treatment process, offer long-term and abiding move with what do not have breakdown. These measure have complement through a buffer. In the extreme of vapour cop, ensure in decompression boiler is mixed in cooling blender, reach drainpipe line directly without boiling water and high-pressured vapour, destroying a knot to dirty is sooner or later thing. 4 times Nextpage of water treatment technology collects useless candle the processing of all material is it is euqally important to be handled with oneself cleanness -- to us character, besides carapace of clear empty pottery and porcelain, that is candle. Normally the circumstance falls, vapour heats the pipe exit efficiency of candle is quite finite also. If be planted as a result of some reason, vapour produces failure, candle " freeze " in pipe, cleared it is very difficult. The electricity that candle exports heats the canal is the job all the time, make full use of at the same time about 0.

8 cling to leftover pressure discharges candle to a special big candle to wrap from boiler, practice proves this is very successful. This is a system that closes completely, obtain adjacent and clean production technology. Want big candle to wrap only by replete, be pulled, those who replace is an empty candle bag. Can reclaim the useless candle in big candle bag. Besides candle, another kind " by-product " it is precipitation the condenser water in surface of interior of furnace of high-pressured vapour dewax, below the worst situation, the part that has candle mixes in condenser water, the meeting when opening furnace of high-pressured vapour dewax forms huge pool. Container lower part is collected to install a valve of simple automatic condenser water in the useless candle of furnace of high-pressured vapour dewax, emit into condenser water buffer, complete a clean work. These advanced components and all auxiliary technologies are opposite condenser water and the cleanness of sketch map of sketch map bumper that derive candle and safety failure free operation of furnace of high-pressured vapour dewax and perfect dewax, the likelihood has indirect effect only. Make be cleaned meticulously daily and be safeguarded to the system it is euqally important to should resemble automatic to water processing at least. Because have a bit,be to not allow to underestimate: Quantity of heat of saturated pressure steam is one of the most critical accounts, its harm sex cannot be underestimated, in because be in,moving for a long time, it can destroy weather strip, valve and pipeline. This is why furnace of high-pressured vapour dewax needs to use fourfold TUV attestation to check in had run a course. Boiler besides solder to examine with pressure, return the system testing that have even if accepts generally in manufacturer system. Examine and approve mechanism to install standard and security to undertake checking to user field finally -- need half an year (German edition is a year) time receives official finally permission. It is booked first time examination then. Through 9 years, it is a whole systematic overhaul process, especially boiler, must be opened and canvass. All all these returned Industrial Revolution times again. Be in colliery and factory, the phenomenal common occurance that the worker in steam boiler explosion dies. Accordingly, heat of our very at present severe high-pressured vapour dewax uses guidelines is the assurance that furnace of high-pressured vapour dewax runs for long surely reliably. The demand of high quality accurate cast that foreground increases ceaselessly, in world each district, be in India and China especially, new large cast a factory to be built in open village. As a regulation, a few product line are run paralell to install, but fall in most circumstance, only one is used at the furnace of high-pressured vapour dewax of whole product line. If everything moves good, this does not have any problems, but if because of furnace of high-pressured vapour dewax " bottleneck " and shutdown, manufacturing backwater not before. Because all candle and modular carapace are made,be a successive and fluent process. Furnace of high-pressured vapour dewax because its pressure circulation account, its job is discontinuous with what undertake by batch. Manufacturing manager will quit the job because of it and encounter an enormous problem. The simplest solution is the system that builds a have more than needed, namely the investment of furnace of dewax of vapour of the 2nd high pressure. But this is the thing that a lot of companies are not willing to invest, they are willing more " stand in point of a knife " on stick one's chin out. How should develop ability to make dewax course becomes more safe so? furnace of future high-pressured vapour dewax, its fail-safe is very important, all and main part undertakes twice installing at least. If possible sentence, they are should more efficient, more energy-saving, because their power source is inputted,install above in 100 kilovolt at least, so they are true " electric tiger " . In light of the eye that uses development, the process that obtains successive job is likely perhaps. Because no matter anybody, wanted to invent the candle device with a kind of fused ego only, they remain need the outdated an eccentric person that these neigh hoarse makes sound and bad smell smokes a day -- but the steamer that is special modernization actually. CNC Milling CNC Machining