Manufacturing industry is the pillar of national economy, and the core that equipment manufacturing industry is manufacturing industry. The country promulgated in January 2012 " industrial transition upgrades program (2011~2015 year) " development advanced equipment manufacturing industry labels the first key to develop a field. As the delegate of advanced production equipment, manufacturing industry of numerical control machine tool is being assumed how the great history mission that transition upgrades. In making equipment already included our country with the foundation, long-term science mixes machine tool of high-grade numerical control 16 compendium of technical development program is affirmatory great science and technology are special, numerical control machine tool makes medium crucial equipment as big airlines, the discretion that designs a level affects the performance of aircraft spare parts directly. Although development of our country machine tool industry is very rapid in recent years, but ratio of photograph of advanced level of high-grade machine tool and abroad is apart from still very apparent. The developed country values the innovation progress of fundamental equipment manufacturing industry very much all the time, in the plan of strategy of production technology project that American department of defense announced 2009, establish production technology is in the core position in national defence technology, its are the wide application that carries sensor mainly, make machine tool design changes directional development to automation and intelligence. According to this plan, the United States is devoting oneself to to develop the intelligent machine tool that can think, through be in each place are in the machine tool even material noumenon interior is embedded sensor and network, all-around to machining production process to undertake monitoring, assure to arrive from the design production is whole the procedure is accurate without by accident, the accuracy that raises a plane to make and dependability [1-2] . Breakdown early-warning is as important as diagnostic technology the meaning is well-known, claimed accuracy of plane structural member is tall and the price is high, treatment is made very complex and take time is arduous, fly to rise of plane component part just compared character, dependability and concealed body function, use pair of large whole plate to expect of late " draw out empty " the method will make the large part such as wing, airframe, spell the large component of outfit in order to replace through means of coupling of rivet, bolt by many spare partses, the treatment purify rate of some spare partses is achieved even 98% , the once appear,breakdown causes loss in machining a process is breathtaking. The trouble that cannot expect appears in machining a process as a result of the machine tool, be like as main shaft or filar lever temperature elevatory, machine tool component can produce heat to be out of shape, make the short of of spare parts precision of treatment designs an object, have more very person it is quantitative change to qualitative change accumulate, appear not knife, place of blade, drive wears away badly and do not rupture suddenly wait for casualty, besides making machine tool happening damages badly, still make machine a spare parts to discard as useless thoroughly, cause huge belongings loss [3] . Resemble nature any calamity change before happening, have bodeful and same, these catastrophe failure that appear in treatment of numerical control machine tool also have evidence to be able to be searched before happen, if increase as cutting tool tatty, heat in metal cutting, noise and oscillatory signal can have apparent change, through real time online detect the change of these signal, according to its the span of eigenvalue can shift to an earlier date to classification to the treatment status of cutting tool early-warning [4-5] . At present major report installed vibration and temperature sensor inside main shaft, use at recording treatment process in real time, pass the treatment process information that gathers numerical control system to show, operation personnel can use these data to undertake optimizing to machining parameter, the probability that if adjust main shaft rotate speed and feed rate,happens in order to reduce breakdown. But to mechanical actuating device, as a result of the complexity of its structure and signal condition, signal is lacked to detect on the numerical control machine tool that domestic place sees now device [6] . Change a standard to improve the intelligence of the machine tool, current, the breakdown early-warning that the sectional logarithm such as plants of a few aircraft main engine, academy place and college charges a machine tool and diagnose the research that had development, its are essential the task takes equipment to go up through measuring namely relevant detect the moving condition that the signal of the source will come to to identify equipment, obtain the use that equipment diagnoses, nip in the bud, take corresponding processing step according to concrete diagnostic result. Breakdown is diagnosed is one kind understands and master equipment to use position, decide its whole or local it is normal to whether run, inchoate discovery breakdown and its reason, can forecast the develops a tendency technology of breakdown. This kind of technology gets attention increasingly, main reason depends on the rapid development of manufacturing industry. Increase of equipment job intensity ceaselessly as numerical control, rate of manufacturing efficiency, automation is higher and higher, facility construction is more complex and changeful at the same time, the correlation of departmental cent also is added more close, flexible rate rises very fast. So, even if a of a certain place little trouble, erupt likely also chain-reacting, the environment that brings about whole platform equipment to be concerned as to equipment therefore is sufferred destroy disastrously. This causes huge pecuniary loss not only, serious when still can endanger person security, consequence is unimaginable. Another account that the diagnostic technology of equipment can win development is the reform that maintains system, can reduce the upkeep costs of equipment greatly, progressively slam the door plans the disagreement reason of maintenance, diagnose a technology through carrying out operating mode monitoring and breakdown, final implementation develops the function with numerical control due equipment efficiently reliably, and improve the service life of equipment. Mechanism of market of machine tool of numerical control of content of research of diagnostic system of early-warning of machine tool breakdown, electric, hydraulic pressure is moved compatibly wait for module at an organic whole, have the marked characteristic with intellectual confluence and concentrated technology. If malfunction in use process, diagnostic difficulty is greater, it is more difficult to emphasize particularly on to detect and be diagnosed of component at machinery especially, gather pertinent significant information not easily, make seasonable feedback, normally the circumstance falls by accident examine rate is very high also, the demand to breakdown early-warning is consequently stronger and stronger. Early-warning of breakdown of numerical control machine tool and the development of diagnostic system are to realize numerical control machine tool online mix with long-range breakdown early-warning diagnose automatically, crucial to the machine tool part machines condition to undertake monitoring, study the mechanism that crucial part malfunctions, build the breakdown model of crucial part, the breakdown early-warning that pair of machine tool equipment realize on the foundation here and diagnose. Basically study content includes: (1) of information of status of job of machine tool of high-grade numerical control online collect a technology; (2) extraction of the signal that monitor and identify; (3) the intelligent confluence technology of much sensor information; (4) the failure mechanism research of crucial part; (5) the real time of status of treatment of numerical control machine tool is online show; (6) intelligence changes breakdown early-warning and diagnostic technology; (7) breakdown forecasts those who tie all and MES system to not have seam compositive. Mechanical failure can arise all sorts of to it corresponding information, wait like temperature, oscillatory, noise, information is gotten is the premise that mechanical failure diagnoses and foundation. All sorts of information that get from mechanical system are breakdown information not just, still included the many information part that has nothing to do with breakdown, and cannot judge breakdown intuitionisticly from the idea of information usually. This with oscillatory signal particularly remarkable, in the oscillatory signal of mechanical system, included the oscillatory signal weight that breakdown causes already, the weight of normal and oscillatory signal that also included mechanical movement generation. In the meantime, suffer the limitation of sampling frequency and the effect that check noise, signal of primitive time domain vibration desultorily, cannot identify the immanent feature that gives signal directly. Accordingly, need uses signal to analyse a method to collect the diagnostic information that breakdown causes from inside signal, so that at identify artificially or be being calculated machine intelligence identifies, this one measure is called the feature is extracted [3-4] . After the feature is extracted, need judges breakdown and analytic machinery to run state as a result according to diagnostic extraction, facility through the set of threshold value moving condition has classificationing early-warning. Below current condition, the method such as network of expert system, nerve still cannot identify breakdown feature signal directly, study the mechanism that breakdown produces deep only so, the mining in all sorts of appearances that cause from breakdown goes out the the most typical, most distinctive, have determinism with breakdown the relation, most sensitive to breakdown information, through be being mixed 2 times breakdown feature is extracted, to the machine tool treatment status undertakes real time is forecasted [1-2, 6] . The model of diagnostic extraction method represents breakdown news is time domain synchronism average technology and rank score analyse technology, and oneself in malfunction of instrument of a favourable turn coming back in diagnosing, get applied extensively. DASP-RAMMOL is online monitor and the typical breakdown a collection of illustrative plates that the information extraction that breakdown diagnoses a system to pass a favourable turn coming back such as pair of gear bearing to fetters builds a favourable turn coming back to fetters, the orbit change of comparative axes judges mechanical failure, in realizing mechanical equipment to move for a long time call the police automatically. Condition signal real time is online collect reach common breakdown case study to collect level in signal, the main content of research is the machine tool detects component and detect place is decided really, the type selecting of sensor is installed and locate, the collection of the signal that monitor and early days pretreatment. In the exports the object that be measured first normally physical quantity in the test changeover is n, the telegraphic date after alternating according to needing to be opposite next undertakes handling, show with proper form finally, output. 1 mechanical main shaft and signal of main shaft casing are monitored with breakdown feature (1) as treatment undertake, cutting tool wears away aggravating, precision of treatment spare parts is affected, need collects signal to forecast the process of this kind of quantitative change through sensor; Cutting tool wears away accumulate certain level to produce qualitative change, appear not blade even cutting tool ruptures phenomenon, in this one process, real time is online the signal that collects can have bodeful, be like amplitude and noise to be able to increase significantly, pass the processing to collecting signal, set threshold value is right breakdown early-warning. Nextpage (2) as main shaft temperature elevatory, main shaft heat is out of shape increase, axial is stretchy. If main shaft is stretchy,the quantity exceeds certain range, machine those who affect a part precision, bring about the generation of reject. Be opposite through increasing a few sensor in machine tool design phase it is very important that main shaft vibration and temperature undertake real time is monitored and necessary. Its are passed collect main shaft temperature, set threshold value calls the police in real time to main shaft temperature rise. Some is homebred 3 coordinate are high-grade the component of main shaft box of numerical control machine tool, main the noise inside temperature of the bearing before radial to main shaft front vibration, main shaft and main shaft box undertakes monitoring, a vibration and temperature sensor are decorated in main shaft front, main shaft box decorates sensor of a noise inside body. The signal of 2 drive guide screw monitors the design of ball guide screw to be a foundation with circular ball principle, initiative it is very important to tighten force beforehand. Bring to bear on only appropriate tighten force beforehand, drive system ability achieves optimal movement status, right now system stability the biggest, wear extent the quantity of heat of generation is the the smallest, smallest. Accordingly, tighten force beforehand undeserved bringing about loss of accuracy of guide screw drive is the 1st kind of primary failure with incidental guide screw. The stiffness defying a turn of guide screw and mode frequency can rise as what tighten force beforehand and increase, bend when what tighten force to cross hour of meeting to increase guide screw beforehand, increase guide screw then wear away; Should tighten beforehand when power is too great, guide screw stiffness and frequency value are very great, high frequency oscillation appears in can working. Tighten the relation between force and guide screw stiffness and frequency value to be able to be used beforehand finite yuan analytic tool undertakes traverse [7-8] . Guide screw is easy because attrition heat build-up reduced the flexural rigidity of guide screw,the 2nd kind of breakdown that happen is, increased guide screw then wear away. Metallic stuff has the character of hot bate, as temperature rise, the stretch model quantity of material is reduced. The metabolic law that has guide screw to curve deflection to follow temperature through heating up characteristic research to build to guide screw material, realize pair of this one breakdown thereby classification early-warning. Because guide screw is in-house,the 3rd kind of breakdown with incidental guide screw is of ball wear away bring about gap produces between guide screw and nut, also increase subsequently as tatty aggravate clearance, accumulate concussion of the generation when certain level brings about feed inverting, affect treatment precision thereby. Integrated above is analysed, for real time control guide screw is working to run state mediumly, forecast the happening of breakdown, need is mixed to oscillatory, noise temperature signal undertakes real time is monitored. Like Sichuan long march Y of lathe bed of 718 machine tools decorates plan to be to the sensor of guide screw: Install oscillatory, temperature and noise sensor around guide screw nut respectively through installing bracket, run state in order to monitor its. Reasonable set studies breakdown news threshold value to get a lot of kinds of information through signal extraction, include oscillatory signal, temperature signal and noise signal to wait, right same for instance vibration measures kind of signal, the oscillatory amplitude size of the different position that monitor can have bigger difference, call the police the reasonable set of threshold value appears particularly important [9] . The essential feature of breakdown is to make machine short of of spare parts precision to design a requirement, change can be opposite each signal machine cutting tool extreme finally to cause position error, affect the precision that machines a spare parts thereby. Some signal influence is direct, if install the acceleration sensor in main shaft place, through real time integral commutation gets transient state displacement, the size of displacement amplitude reflected treatment error. Additionally a few signal are precision of indirect effect treatment, if install the temperature sensor on workbench, inhomogenous meeting affects slideway face temperature slideway linearity, then aggravate slideway rolls piece wear away and oscillatory, make process occurrence error. The reasonable set that door of the signal that monitor is restricted to be worth is the premise condition of breakdown early-warning, all the time since it is signal collects processing and the research stress that monitor a technology automatically, sentence to avoid to produce miscarriage of justice and leakage, choosing a fast and accurate differentiate function is solid the line is monitored now and pilot is crucial [7-8] . DASP-V10 collects processing to be able to get all sorts of parameter through signal, watch 1 listed the definition of a few parameter. When treatment process transfers to flutter or resonance condition from steady state, oscillatory on time domain amplitude will increase, go up in frequency domain signal is main frequency band general from high frequency paragraph to low frequency paragraph mobile, signal energy on frequency domain distributing by turn into dispersedly concentration. In these parameter, the volume that the reflective vibration with parameter of the greatest peak value, average parameter, average amplitude parameter and virtual value can very good parameter measures, can regard the standard that evaluates oscillatory size as data, and in development the trouble that give diagnoses the change of these parameter on the system show real time in inspect screen to go up, the working status to the machine tool has the member that help machine tool machines a person more intuitionistic understanding. But, the amplitude that different position vibration measures is different, differ sometimes the conference is very big, this is adverse to making the door be restricted to be worth. The variance σ of the variance analysis signal of Nextpage1 signal 2 (the square of the standard deviation in DASP parameter) it is reflective signal the quantity of an ideal feature in trend of change of the amplitude in time domain, if be calculated from sampling data, computational formula is [10] : σ 2i=1/N ∑ (Xi-xi)2, (1) in type, xi is sampling signal; For the average of sampling signal; N is sampling check the number. The screen with can better variance signal of a few cacophony, make the float of the breakdown feature clarity of need checking examine comes out now, benefit sentences other software automatically to come true at the computer. Graph 1 it is the signal of time domain vibration that when some machine tool is machined, collects, graph the 2 real time variance that are this signal. Comparative these 2 kinds of condition, when can seeing the machine tool produces flutter apparently, oscillatory energy is increased apparently, the variance of signal can convey the metabolic case that gives oscillatory amplitude well, but the noise with if signal is medium bigger interfuse, cause time domain weaveform local and remarkable enlarge, use variance to may create appearance of breakdown miscarriage of justice [11] . Analytic variance analysis is to be aimed at only related the each other of 2 signal all the way the data count that signal makes, in signal cacophony the meeting below bigger case affects the accuracy that breakdown diagnoses, and the difficult problem that also is put in threshold value set [10-11] . Close function to be analysed through undertaking to two signal each other, the oscillatory signal of two direction can be collected in the place that monitor, to two signal X (T) with Y (T) the concern between expresses to be: Rxy(T)=lim1/Tx(t) . Y(t+T)dt. (2) the definition that involves coefficient each other is as follows: Pxy=Rxy(T)X.
Y of б of Y/ б X, (3) in type, , for signal X (T) , Y (T) average; Y of σ X, σ is signal X (T) , Y (T) standard deviation. Consider to make clear, mutual concern counts ρ Xy to have the very good sex that be worth region, size of its absolute value always is in [0, inside the interval of 1] , because this passes each other,relevant analysis unites the door that makes different signal likely to be restricted to be worth. the limits that the door is restricted to be worth limitation is in [0, inside 1] interval, later period is restricted the door to be worth through the experiment of period of time adjust reasonable range, the result that makes breakdown is diagnosed is more accurate. The last word is high-grade rate of automation of numerical control machine tool is high, once malfunction, it is more difficult to detect and be maintained. What use popularity rate as product of numerical control machine tool is ceaseless rise, increase what high speed changes treatment requirement ceaselessly, make the mainer and mainer consideration factor when the breakdown of equipment diagnoses a function to already made product of machine tool of numerical control of user choose and buy. This function can make machine tool manufacturer is benefited already, can make machine tool manufacturer and user are built again mix for a long time close relationship. Carry early-warning of breakdown of numerical control machine tool and the development of diagnostic system, can rapid prove a cause purposefully and determine breakdown position, realize prescient maintenance, as soon as possible discovers breakdown hidden danger, reduce machine tool machine down time, prevent to break out an accident, improve productivity. Additional, in the machine tool production is debugged, use and main direct effect has in maintenance. Breakdown is diagnosed and long-range monitoring function can set control directly in the system, these functions are to acquire a machine tool the precondition of the oldest utilization rate, when joining with automation equipment, be such more especially. The closest development trend is, use compositive sensor (from adaptive control) the data that explores, through technical skill active intervention machines a process. CNC Milling