Special high temperature resistant alloy strengthened industry the interest to EDM

The technology can maintain cut of current electric spark line to have titanium alloy and other only high temperature resistant the face of material is whole degree, so this craft applies the use quantity of the domain to growing quickly in spaceflight aviation industry and medical treatment. Technical exhibition is made in American Chicago international (IMTS 2010) , branch of United States of GF AgieCharmilles company (Yilinuosi city Lincolnshire) highest controller spoke of electric spark discharge machining to professional media (EDM) application develops a tendency, and one of specialized products that EDM equipment is this company. One when want is being weighed most among these trends is craft of cut of electric spark line on the aerospace that applying increasingly at once cannot using this to machine craft for a time and component of medical treatment industry. We ask this company to tell us to concern the reason of the more information of this kind of trend and trend backside. It is the pool that discovers to these below. Graph cut of 1 electric spark line special apply to in machine treatment difficulty very tall only alloy cooperates complex appearance is made on material. The treatment operation that current EDM power generator can optimize these material through fine tuning is current high temperature resistant the new generation part that alloy is using at making aerospace, medical treatment and other trade, but groovy machine treatment method is in answer these data sides to need to overcome a lot of difficulty. This is what have this kinds of a few alloy because of a lot of production manufacturers is special, have only " recipe material " , these recipe material are the specific application that is aimed at them according to what oneself norms undertakes developing. These alloy have very fundamental value, its are detailed the secret that information belongs to need to be guarded highly, and the information that concerns specific applying seldom also discloses. But, what we know is these special recipe material often compare the market common coequal data is more hard and tough, and fall in a lot of circumstances, using groovy machine to machine craft to have cut to its is impossible or extremely costly. Accordingly, a lot of production manufacturers that processing these data search other to be not groovy machine to machine a method in exploration all the time. And especially the new attention that craft of cut of electric spark line is gaining authority. In 20 centuries 90 time end is mixed at the beginning of 21 centuries, alloy of Inconel of nickel chromic alloy, titanium and other are high temperature resistant the makes dosage got great range growth of alloy, mix in aerospace especially medical treatment industry. But, cut of electric spark line never can be used at cut as a kind the selected craft of these material and be accepted extensively, because be opposite,basically be the concern of blemish of surface of the component after treatment. Besides the material that forms a kind to call white layer, the EDM technology at that time is baked via often can bringing about the surface to appear blue (effect of a kind of oxidation) , micro-crack and exterior crackle. White layer material is on microstructure by workpiece material a few inferior surface layer is formed, these inferior surface layer has been machined by EDM on metallurgy height is local change but place of intense quantity of heat was changed. Be in this " hot influence area " the material inside happened normally sclerotic and exist with a kind of state that becomes crystal almost likely. And once this is planted,component investment is used, white layer flakes very easily, bring about micro-crack to form and bring about component invalidation finally. High temperature resistant the micro-crack in alloy workpiece or EDM craft place issue caloric result. Besides reduce component surface likely complete beyond spent micro-crack, EDM brings about exterior crackle possibly still (" crackle line " ) affect the blemish with beautiful face with other. Although this kind of craft still compares the groovy machine that using at that time to machine a method,have remarkable taller precision, but the apprehension that machines the surface to EDM brings about this craft to be rejected to be used in a lot of application. Graph 2 be in (England) in a check study that Birmingham university institute has, the cross section of workpiece of Inconel 718 of chromic alloy of a nickel blocks the enlarge below microscope in Lai when 500 times observation, its are done not have apparently show apparently visible white layer or " recast content " power generator extends aid in 20 centuries development of 90 time evening comes out electroanalysis instead disappear of power generator technology is opposite besides people face of EDM cut part is beautiful spent apprehension, object of blue to baking phenomenon toughly especially. Baking blue phenomenon is unseemly of surface of a kind of workpiece fade phenomenon, the cause that causes it is the chemical reaction that produces below the condition that ion of a few specific metals and medium water exist in electric current. Substantial, it is a kind of form of oxide or rust. Although electroanalysis instead,power generator is in eliminated this problem in fact, but encounter when this kind of technology what developing at present is special high temperature resistant weakness also is shown when alloy recipe material. Fortunately, of generator of digital type power introduce remedied this one flaw. One of characteristics with the most important generator of digital type power that cut of electric spark line uses can are aimed at namely include high temperature resistant the specific stuff that alloy has recipe material to expect inside only undertakes to generator " essence of life is moved " . For example, the generator of digital type power that develops by GF AgieCharmilles company is called " intelligent power happens (IPG) " power source. Manufacturer of other EDM equipment also developed generator of digital type power. Manufacturer people the advantage that the ascensive place that using the high speed that miniature chip sets inside circuit of power generator electron to digitlize data processing ability brings. But, the function of these systems and ability have each different. For example, use at carrying out the software algorithm of operation to be belonged to to have algorithm only inside microprocessor. Naturally, every manufacturer alleges in emulative ground the advantage of own system. Final user must differentiate by oneself which kind of alleging represented first-rate value. But, make a firm to aerospace industry and medical treatment industry for, crucial essential factor is how generator gets effectively " essence of life is moved " . The power generator that the IPG of GF AgieCharmilles company has essence of life to move capacity namely represents a product mediumly. This kind of power source can cooperate the system of cut of electric spark line with broad range to offer the tall precision that can reach perfect surface mass from the design. Generator of power of type of this kind of number can control the energy of each electric spark, generation comes subtly Ra0.

05 μ M (2 small inch) the surface is bright and clean degree. Below typical situation, once generator is aimed at some,specific recipe material undertook essence of life is moved, so the processing factory can use machine of cut of this one electric spark line to process this kind of data only. The attune of essence of life of generator of power of logarithm word type is the challenge of a tall difficulty likely, because current have only high temperature resistant alloy recipe material often mutual have very tall likeness to spend, but the generator that still asks to undertake differring is adjusted in order to optimize cut process. GF AgieCharmilles company had established an expert group, this group can implement experiment cut, evaluate a result and decide accurate generator to set parameter, in order to realize the quickest cut treatment and won't cause micro-crack or defect of other workpiece surface. Nextpage considers this to work most the quantity of heat that substantial depends on controlling EDM process place to arise. This kind of control asks to make the balance with tiny essence of life. Substantial, EDM used the height is centralized electric energy between electrode and workpiece to transmit (namely " electric spark " ) quantity of heat comes workpiece material microscopical class a few material boiling evaporate. This kind of craft lets EDM can machine craft than groovy machine more significant cut is hard with tough material. But, unless made careful control to quantity of heat, quantity of heat lifts likely exorbitant degree, bring about workpiece surface to appear the condition that we do not consider to see. Use digital type generator essence of life moves way, EDM manufacturer can change a line to cut the attribute of EDM electric spark through critically, namely how does electric spark happen, the appearance of electric spark and wavelengh, will achieve the balance of optimization. These generator make manufacturer can shorten the happening of electric spark of line cut EDM time, retain the strength of necessary quantity of heat that cut place needs at the same time. Below typical situation, this kind of result is to be in electric spark pulse is more strong intense and switch cycle more reach below the condition that shorten. The duration of these more intense electric spark is extremely short, as a result has thimbleful at be being met only or can permeate workpiece to bring about micro-crack or form white layer without any quantity of heat at all. Be aimed at the independent report of AgieCharmilles generator according to, after although exterior layer purify was carried out 4 times in investigator,be being machined, high temperature resistant surface of alloy experiment component is nonexistent also white layer. High temperature resistant alloy treatment skill is accumulated through old experience, EDM manufacturer had been built conduce to high temperature resistant the operation convention of alloy line cut and skill. Although had not applied to cut of special recipe alloy already establish parameter watch, but be aimed at a standard high temperature resistant the setting value that alloy recommends and operating rules are a good jumping-off place. Include type of line of pair of medium water, electrode and equipment characteristic function among them these variable choices. In cut high temperature resistant when alloy, the processing factory ought to use a few measure to reduce the quantity of heat that conducts workpiece to go up as far as possible. A kind of kind that reachs this kind of result is to maintain the medium water that equipment place uses to be in refrigerant water state to fall. Ought to consider aux will be able to enough a water is warm maintain in ± the refrigerator of 1 ℃ serves as high temperature resistant one of requirement conditions that alloy line cuts treatment. But, when measuring finishing part ought to keep one's eyes peeled, because component temperature is dropped in cut process,produce a few results that return the meeting below temperature of processing factory environment to produce marked change in the component likely. To certain high temperature resistant alloy, these results become serious problem likely. Graph what what 3 electric spark produce is intense but height is local the quantity of heat that turn formed bleb of a kind of steam in workpiece surface lower part. Of steam expand quickly " maintain defeated bleb " in playing workpiece material microscopical a few material of class. And the data that keep is shown like plan institute. Plan institute is shown on for old model the result that power generator produces, and place laying a plan shows generator of power of type of amount to word (GF AgieCharmilles IPG is in this exemple) the result that produces. Conduct work to prevent quantity of heat further, the heat conduction rate of medium water ought to be adjusted to can reduce line electrode and workpiece between the level of span or clearance. Basically, apply to cut metal carbide the conductivity level of course material is high temperature resistant a of alloy good jumping-off place. Make simple explanation to this below: Reduce conductivity to mean fall to be able to be reached when the space is very little state of affairs between electrode and workpiece both the best resistor grade between. Below these conditions, need less energy to be able to overcome resistor to form electric spark only. In short, the quantity of heat that fewer energy means same treatment work place to arise is fewer. As a result of high temperature resistant the hardness of alloy is extremely tall, GF AgieCharmilles and other EDM manufacturer are recommended use coating or even the electrode line of double deck coating. Compare with common brass, coating lead can control the formation of electric spark better. Form more intense electric spark more easily so, thereby efficient cut is high temperature resistant alloy, and in the surface that still won't permeate material. Agree with cut is high temperature resistant the AC SW-A electrode that the line electrode give typical examples of alloy is GF AgieCharmilles; This kind of electrode by by zincic coating place around brass core line is formed. Express according to this company, AC SW-A is special apply to machine treatment those requirement line electrode can be in the complex part that is more than the cut below 10 degrees angle. Generally speaking, the coating electrode of all such electrode can carry a taller voltage from power generator, because this kind of electrode can be able to bear or endure,get the quantity of heat that when electric energy is released with electric spark form, produces. This kind of coating is belonged to " sacrificial sex " coating. The purpose that designs this coating depends on letting them drop in the melt below relatively inferior temperature, be absorbed thereby and take away quantity of heat, otherwise these quantity of heat can affect intensity of brass core line. (physicist is what this kind of effect says evaporate latent heat) . Make so coating electrode line can implement cut more efficiently and can be able to bear or endure to rupture and maintain workpiece temperature at the same time inferior. And in high temperature resistant sincere brass line uses to exist in alloy treatment another defect: Appear to eletroplate afresh phenomenal possibility. During cut, splash down of melt of a few brass meetings is in workpiece face is new solidify. And keep clear of from component surface this brass must ask to use what cost holds high to clean a process likely. And if not take out this is brass, criterion the brass layer on this new plating brings about wrong component dimension to measure an outcome likely. And fall in high temperature condition in assembly work when, the brass possible melt on new plating drops, bring about component dimension inadequacy thereby. Will use at cut high temperature resistant the equipment of line cut EDM of alloy must have abiding and durable precision and definition. In such as aerospace and medicine in such industry, line cut machine predicts will round-the-clock 24 hours of jobs. The working cycle of more than 50 hours is not infrequent. And the line cut opportunity that the job leaves in these conditions must hard usage. Recommend these equipment to have use at the long-range announcement ability that craft is monitored or dependability assures. This kind of characteristic will make line cut function enough send the message with wireless means to mobile phone or network of such as email such instant information system that is based on Internet. Line cut EDM not due is negative evaluation once for a time the line cuts EDM to be considered as high temperature resistant of alloy cut ban with craft. Someone says, this one craft gets this is planted " negative opinion " the reason is solder to a kind the unfortunate experience of craft. Integrated the view of each respect, this story says, be in after accident happening, the accident cause that traces is one uses a kind high temperature resistant the wrong welding line on the reaction engine part that alloy makes. Apparent, also be in this welding line and this with the quantity of heat that at soldering the electric energy place of the process produces high temperature resistant micro-crack arose inside alloy component, bring about component invalidation. It is if really ever since, the engineers inside this industry are excessive and careful the craft that the ground prevents to use all sorts of involving to electric energy, include specific type solder and line cut EDM. Engineers won't consider a kind of technology that involves electric energy to replace method of groovy joint and cut. This kind of practice that is not willing to use line cut EDM makes a kind of long-standing policy, and about EDM the news of current security and ability just is in at present ability overthrows this kind of existence between these mill business ban with the practice. CNC Milling