Converse project technology is measured in water pump impeller and process medium application

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Headline: ? Regret is able to bear or endure gem of  of Du Zhi of blown away by wind of  of ü  carry puts in order take an examination of ㄕ of stay of proceedings of protruding of P of   to kitchen talk in one's sleep of beautiful jade of Fu of  of emperor path  masts ancient name for a water catltrop phlegmy mother of こ of 4 Chang Xian pats Li dash forward  foal  rancors Ping of  of 9 shelfing  steals flatter Chang Xian こ . And how to use converse project technology to detect water pump impeller machines precision. The article reachs three-dimensional model compose to build this one example through be being measured to scanning of water pump impeller, introduced the concept of converse project and fundamental to the reader; The advantage that optical scanner measures in the scanning in converse project; How to use Imageware of converse engineering software to handle water pump impeller to nod cloud data; With UG NX march the face is founded and three-dimensional model; And how to use converse project technology to detect water pump impeller machines precision. One, converse project brief introduction is converse project (Reverse Engineering) also say to try a project instead, it is to show with certain measurement the method undertakes metrical to objective or model, establish modular method through three-dimensional geometry according to measuring data, reframe the CAD model of objective, realize products plan and production process thereby. With traditional design production method differs, converse project is to be in not complete without blueprint paper or blueprint, and below the case that has sample, use three-dimensional scanning measuring instrument, accurate apace measures sample surface data or outline appearance, try to nod data processing, curved surface to found, three-dimensional and hypostatic model reframes, undertake numerical control process designing through CAM system next, till use CNC,treatment machine tool or fast forming machine make a product. Converse project includes appearance to be begged instead, craft turns over material of sue for peace to be begged instead wait for a few respects, in the actual application of industrial domain, basically include the following content: (The design of 1) new part, basically use at the remodel of the product or profile modeling design. (2) off-the-peg spare parts is measured reach duplicate, the design intent of emersion primary product and reframe three-dimensional digitlization model. (3) damages or wear away of the spare parts reductive, so that repair or refashion. (Of 4) product detect, detect for example analyse a product be out of shape, detect solder quality, and undertake an analysis to processing the error between product and three-dimensional digitlization model. Converse project technology provided very good technology support to be made quickly, it has been become digest one of important ways that absorb and develop 2 times. Converse project technology basically includes two respects content: Digitlization technology and curved surface reframe technology. Digitlizing a technology is to use three-dimensional scanning measuring instrument to collect objective or model surface data. Curved surface rebuilds a series of dot data that the technology is the geometrical surface that arrives according to measuring income, construction goes out model body curve, curved surface, reframe finally three-dimensional model. Converse project serves as plan to close to already the product undertakes data is measured, a kind of when improve development of new product of design and implementation analysis, important step, accelerated new product effectively to answer the speed of the market. Converse project can output fast prototype to make those who reach mould treatment a variety of data formats, support different use. 2, the three-dimensional data of water pump impeller is measured 1. Data collects executive condition to develop as what pass the relevant technology such as processing of feeling technology, control technology, image and computer vision, appeared data of various object surface geometry get a means, detect equipment is gotten for what three dimension seize the product offerred hardware condition. Current, use the more three-dimensional scanner that has the national production such as Germany, England, Italy, United States is measured with 3 coordinate machine. From principle of the structure that measure a head for, can divide for contact and blame contact two kinds. Among them, contact is measured can divide again to be measured forcedly the head is mixed soft measure a head, this kind measures an as direct as the object that be measured contact, get data information, more commonly used is 3 coordinate are measured machine (CMM) . Blame contact is measured can divide for CT of optical law, industry, ultrasonic law and magnetism resonance (MRI) . In converse project, optics measures law application most extensive. Typical light measures a head is the principle that uses optics and laser, include laser scanning, optical scanning. 2. The speed of three-dimensional disperse sampling of the advantage objective in curved surface scanning reachs optical scanner data quality is one of main factors that affect application of converse project technology. 3 coordinate are measured machine (CMM) it is a kind of relatively mature contact measures equipment. It has noise low, precision is tall (can amount to ± 0.

5 μ ｍ ) , repeatability is good wait for an advantage. Its defect includes to measure speed slow, efficiency is low; Do nicety to measure hard to software object; Need is injured to measuring head surface and measure head radius to undertake compensating waiting. The characteristic that measures data is high accuracy low density. Because dividing area to measure the breakthrough on the technology in recent years, make the measurement of umbriferous grating law precision gets rising further. The ATOS flow optics e.g. German GOM company is three-dimensional scanner, measure speed to be more than 43000 a little bit / ｓ , single width photograph can scan check the number can be amounted to most 400, 000 are nodded, precision of single width photograph is ± 0.

03 ｍ ｍ , whole measures precision to be less than 0.

1 ｍ ｍ / ｍ . Optical scanner facilitates especially the scanning of complex curved surface, and CMM can measure the narrow point on complex curved surface only, cannot the appearance that whole report gives curved surface. Although its measure only place precision is taller, but go describing complex curved surface to make integral precision is reduced greatly instead with narrow point, and optical scanner criterion rather. Additional, optical scanner still is had measure range big, carry convenient wait for an advantage. ATOS optical scanner cooperates high resolution number to take a picture the system makes sweep range can amount to 8m × 8m bigger even, and can very move to work to objective spot conveniently. It not only the scanning of miscellaneous outline of comfortable Yu Fu, and commonly used act the role of at inside and outside of car, autocycle converse modelling works. The ATOS optics scanner that the author uses German GOM firm here (ATOS I 600 EU) undertake data collect, measure precision for 0.

1mm/0.

5m. Scanning means: Grating principle reachs principle of GPS fixed position. When ATOS scanner is being measured, can move around the object that be measured at will, the grating that uses 11 different width reflexes information, again via data computation of video processing system is handled, can get objective surface nods data. 3. The pre-construction labour that water pump impeller scans regarded convenient impeller as scanning and the accuracy that assure scanning, need to do necessary pre-construction to impeller, if stick developer of spray of surface of reference point, object and instrument and software calibration,wait. 4. The whole appearance of impeller of process of scanning of water pump impeller needs to scan, because this cannot finish the one-time scanning to impeller. According to the appearance of impeller, if the graph is shown 1 times, distribute the part into on, below two parts, undertake scanning respectively. It is again next in ATOS software, through communal reference point scan respectively two files of earning are amalgamative for a whole. Graph appearance of impeller of photograph of objective of impeller of 1 water pump roughly dimension is φ 370 × 85. After to ATOS scanning system undertakes calibration, OK to part of fluctuation of water pump impeller the different position of many angle undertakes scanning. Reference point of scanning software basis, have every scanning picture automatically going all out closing, finish the scanning of whole impeller appearance finally. Graph 2 after be being finished for scanning, change to neat, triangle through nodding the cloud, Guang Shunhe is rare change, gotten impeller external form orders cloud document. Output * next.

STL file, the foreword after so that Imageware software is bit righter,the cloud undertakes is handled. The water pump impeller that scanner of graph 2 ATOS scans is bit more primitive the cloud 3, undertake handling reaching to nodding the cloud with Imageware and UG NX three-dimensional reframe to want to decide impeller is basic above all the curved surface type of appearance, use Imageware software to do converse processing next, the flow that processes data is abided by " dot -- curve -- curved surface " principle. 1. Undertake to nodding cloud data with Imageware software software transfers into scanning earning orders cloud document handling Imageware, depend on the feature of foothold cloud, make a few additional fiducial, so that choose vane wheel,the cloud undertakes azimuth is opposite neat, prepare to draw sectional line. The dot of impeller contains a lot of miscellaneous features in cloud data, because this needs,filter miscellaneous dot. Undertake optimizing to nodding cloud data, delete needless several foothold. Reduce the density of bit of cloud appropriately, can accelerate the rate that the computer treats. (The draws diagnostic line extraction of 1) feature line is the key that whole curved surface reframes. According to impeller appearance characteristic, differentiate the area that gives conicoid, be like: Planar, columnar face, spherical wait. Nod the cloud to undertake breaking up to impeller, draft these conicoid to add up to tectonic plane, cylinder face or spherical, or make a feature directly. Plane can be used at 3 o'clock or two-phase is handed in will decide point-blank, columnar face decides with sectional line and vector. To free curved surface, need construction to give the diagnostic clue of curved surface. Nod the cloud to make necessary and sectional line to impeller first, next the miscellaneous dot of cloud of eliminate cut noodle undertakes necessary light is arranged, draft cut noodle cloud to synthesize a curve finally, so that construct free curved surface. Impeller and axial join place are inside helix chamfer, very difficult when measure. Here, the key is to make corkscrewed yarn, measure a pitch next, construct in UG NX software finally standard corkscrewed yarn. Make a circle for dot with the center of aperture above all and umbriferous go up in helix noodle cloud, generation helix is sectional the line nods the cloud, plan to add up to generation corkscrewed yarn, pass the corkscrewed yarn that cuts out corkscrewed yarn gets half rounds finally, through bicephalous end points computation reachs the pitch of corkscrewed yarn is 29.

86mm. To make gotten pitch more accurate, we can make the circle with a few different measurement more, beg its average. (2) feature line analyses the precision that weighs compose feature line to ensure, the procedure is established in the compose of lines of any a feature in, want at any time the deviation between test point cloud and curve. Ensure diagnostic line is inside deviation limit, in order to assure the consistency with prototype. Result of corkscrewed yarn drift analysis is shown 3 times like the graph. Graph the deviation of 3 features line detects 2. Build curved surface model to read the * that takes Image Ware software directly in UG NX software with compose of UG NX software.

The file of IMW format, guide the diagnostic curve that has built in the compose in Imageware in UG NX, and should assure the consistency that coordinate fastens. Undertake an analysis to the curve that transfer into, undertake to the curve light arranges processing, or undertake reframe and editing to the curve. The diagnostic modelling of use UG NX and function of curved surface modelling, finish the three-dimensional model of water pump impeller finally. If pursue,4 are shown. Graph after the 4 three-dimensional models that finish in UG NX software finish the three-dimensional model of water pump impeller, can read in the three-dimensional model that uses UG NX software to reframe conversely in Imageware software, the deviation between the dot cloud of the three-dimensional model that trade off study reframes finally and scanning. Come out through using chromatic cloud atlas to show difference, can understand curved surface and the between difference that nod the cloud very intuitionisticly to be worth, and can designate an acceptability tolerancepublic errand area, seek an amount that nods inside tolerancepublic errand belt, detect thereby the accuracy that converse scanning measures. If the graph is shown 5 times,analyse a result. Graph of 5 three-dimensional models and cloud of actual measurement dot detect graph 4, use converse project to undertake the product examines to be used no matter why to plant methodological treatment, need to machine precision to undertake examining to its. Use a convention detect the trick is very difficult accurate detect, because this can use converse project technology likewise,undertake to the spare parts accurate, efficient detect. Undertake scanning to machining a spare parts above all as afore-mentioned methods, mix the dot cloud of scanning earning next the three-dimensional number model of original design transfers into together in Imageware of converse engineering software, the analysis compares the deviation between 2 models, use chromatic cloud atlas to show difference, detect thereby the treatment precision of the spare parts. Converse project technology not only in sheet on treatment can very undertake detecting to complex part conveniently, and in be produced in batch and shedding to hydrate to produce, also appear very convenient to the sampling observation of the product. If note model the crust of the mobile phone, can use converse project technology to be finished immediately detect the job. 5, converse project technology is in brief summary is a development, practical in product research development and omnibus very powerful technology. Benefit serves as with optical scanner get the measure that three dimension occupy the space, to gotten point with Imageware of converse engineering software cloud data undertakes handling, its difficulty is built for curvilinear compose, detect and revise. And contented curve light is only suitable, light of curved surface ability is suitable. Curved surface and the extraction that nod the be identical precision of the cloud to basically rely on crucial feature line and compose build precision to assure. Use converse project technology, can get the exact number model of objective and duplicate not only, and still can be revised further and make new mathematical model and product project plan, make the assimilation of the product is absorbed thereby develop the work with 2 accurate and quick. Not only shortened product development cycle, and the successful rate that raised product innovation. CNC Milling CNC Machining