Technology of the quality since bear of accurate test technology assures important task

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The development change quickly of the advanced technique, accurate test technology should get used to this kind of development. Accurate test technology learns the action in the division in machinery is to be service of advanced manufacturing industry, bear the heavy responsibility that has quality technology to assure. This wants to be jumping-off place in order to improve the quality of the product above all with respect to the requirement, this also is the mainest goal that should achieve. It is the manufacturing beneficial result that accurate test technology wants to improve a product next. Accordingly, detect the requirement that the method wants to be able to get used to rapid development to produce, cannot pure detect to detect, cannot ask because of what detect more and affect manufacturing beneficial result, set out from more positive point of view, because nicety checks what good service of the technology promotes productivity thereby to rise,should be. The development rule of the demand that expands according to advanced production technology and oneself of accurate test technology, extending new measurement ceaselessly principle and test method, and technology of test information processing, mechanistic division, predict the following respects need to develop. 1, the measurement in 0 scrap production is controlled in manufacturing industry, the good cause that quality assures is to execute 0 reject of production to make. In the process that achieves this goal, the action of accurate test technology and principal port are self-evident. The treatment quality of component, overall assembly quality is handled with the analysis of treatment facilities, test equipment and test information etc about, because this realizes 0 scrap production, the angle that checks with nicety sets out, the following problem should grant to consider: (Before 1) is processing work, detect beforehand machine tool. How to have desired result well and truly to machining equipment quickly, win the precision state of the machine tool, this is right reduce do poorly done work over again substantially, eliminating do poorly done work over again even is very beneficial. Of course this is to include to detect the research development of equipment. (Undertake to workpiece in 2) production process online measure or undertake to workpiece 100% detect, this considers to agree with with respect to need trends or the test equipment that permit trends, even can compositive the special test equipment in machining equipment, achieve real time test, revise craft parameter ceaselessly according to checking a result, to treatment equipment undertakes complementing adjustment or feedback is controlled. From precision theory the respect also should study dynamic precision is academic accordingly, the assess that includes dynamic precision. (How does 3) research make full use of measure information to realize 0 scrap production. Through 100% online those who measure data make full use of, the trends that the error in the analysis is machined and measuring a process from which distributings is characteristic, the precision loss of the dynamic character according to machining error and sensor precision is characteristic at the same time, and product quality requirement and tolerancepublic errand regulation, give out the basic and theoretical model that 0 reject make. Make full use of artificial nerve network, the contemporary maths method such as genetic algorithm undertakes accurate treatment quality forecast, accomplish quality lead control. 2, technology of test of contact of blame of visual test technology is very much, what be worth to be carried particularly is visual test technology. The development of contemporary vision theory and technology, depend on the function that person eye can fulfil imitate not only, more important is it can complete the work with person eye insufficient institute, so visual technology serves as current latest technology, mature ceaselessly in the technology such as electron, optics and computer and get developing quickly on perfect foundation. Visual test technology is to build technology of a on foundation of computer vision research burgeoning test. The content such as understanding of the visual pattern recognition that studies with computer vision, vision is different, the vision checks technical stress to study the position of the geometrical dimension of the object and object is measured, if the car is white,automobile body is measured of the three-dimensional face form such as the measurement of three-dimensional dimension, mould quickly, large work coaxial is spent measure, in all face sex is measured etc. It can apply extensively at online measure, the active, real time such as converse project measures a process. Visual test technology develops in abroad very fast, be in early 20 centuries 80 time, american country Bureau of Standards predicts, detect of the task 90% will be finished by visual test system. The United States has many 100 company to ascend the body tests management market of the system at the vision in 80 time, visible vision checks a system to have an outlook very much really. Already saw on the exposition of Beijing international machine tool October 1999 abroad uses a vision to detect the instrument that the technology develops, if 3 coordinate measure optics of type of going from place to place,high accuracy of machine, high speed digitlizes optics of contact of scanning system, blame 3 coordinate measure the advanced instrument such as machine. 3, measure means to develop 　 to diversification (the application of technology of confluence of 1) much sensor in production spot is much sensor confluence is to solve the method that information measures to get in measuring a process, it can raise the accuracy that measures information. Because much sensor gets information with different method or the angle that never are the same as, because this can pass the information confluence eliminate the false and retain the true between them, rise measure precision. (Three-dimensional dimension measures white automobile body of measurement technique of type of 2) building blocks, combined-type the system belongs to this kind of method, also can say it is flexible very good special coordinate is measured machine, the key depends on a system build. (3) is portable if measuring instrument of portable fiber-optic interference, portable many Cheng is three-dimensional,measure an instrument measure a system to wait, the measurement that often is used at solving site large size problem. (4) fictitious instrument is fictitious the instrument is the application that virtual reality technology checks a domain in nicety, home already had thorough research. One kind is the test a variety of digitlization the instrument is fictitious into a number that is hardware to prop up with the computer the intelligence of type influences test apparatus; Another kind is research fictitious in making fictitious measure, measure like fictitious gauge block, fictitious coordinate machine. (It belongs to 5) intelligence structure the structure detects diagnose with breakdown, it is the shirt-sleeve intelligence technology, an across course that passes feeling technology, IT, copy to give birth to science of technology, material to wait, the concept that makes monitor transfers to be monitored to online, dynamic, active real time with control. 4, measure dimension to continue to develop towards two extremes alleged two extremes point to the large size that measures size now relatively and small size namely. Normally the measurement of dimension already by wide for the attention, also developed varied test method. In recent years, as a result of the rapid development of national economy and urgent need, make the range that the produce and tests in the project requirement of a lot of respects exceeded us to be able to check, large and the measurement that is like plane appearance, mechanical crucial part is measured, the collimation of slideway of high-level building elevator is measured, the spot calibration of tank truck ask to be able to undertake large size is measured; The rapid development of microelectronics technology, biology technology, explore the demand of corporeal microcosmos, those who measure precision is ceaseless rise, ask to undertake rice of micron, accept checks again. (The measurement technique of 1) large size if project earth measurement technique is to point to in the certain principle that measures the earth and method transplant and improving machinist Cheng to measure, produce new measurement technique, still have other a few methods that measure large size, if laser dogs,interfere three-dimensional dimension to survey a system. (2) accept rice checks the climate that the technology creates from production to look, ask concessional error reduces 1 ／ 10 every years 3, because this asks to measure measure to have taller and taller precision, can trace to the source international standard (ISO) . Of course, accept rice is measured varied also, interferometer of glazed interference measuring instrument, quanta, capacitance measures interferometer of ray of small appearance, X, frequency to dog electron microscope of measure of standard of type law Po, scanning (microscope of channel of SEM) , scanning (microscope of STM) , nuclear power (AFM) , element measures machine M3(molecular Measuring Machine) to wait. 5, the requirement 　 that realizes all sorts of tracing to the source (1) asks from the demarcate, measurement from calibration high accuracy of high accuracy trace to the source, a lot of circumstances fall to find the instrument that contented precision asks hard, main reason is to trace to the source restricting the progress that measures precision, can use the demarcate that measures an instrument and fictitious measurement technique below a few circumstances, solve trace to the source problem. (2) spot is direct demarcate more and more measurement instrument requirement spot is direct demarcate, still be three-dimensional dimensional demarcate more very, developing spot demarcate technology and instrument is the key that finishs these demarcate. (Source accept rice checks trace back of 3) accept rice tracing to the source also is a serious problem. Abroad already had NRIM of PTB of American NIST, Germany, Japan to study silicon (the brilliant face span of 220) crystal is accurate dimension, dimension of elemental crystal lattice has very good stability below constant temperature, can use build accept Mi Suyuan is fiducial. CNC Milling