Use 3D scanner development to exceed accurate screw rotor

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  • source:DAHLER CNC Machining
EBARA Densan company is the wholy-owned subsidiary with subordinate EBARA Corporation, scope of operations includes wind-force and hydraulic and mechanical system, water treatment system, environmental protection system and semiconductor to make equipment. The weapon of a favourable turn coming back that the Electromechanical unifinication branch of the company uses his to be accumulated for a long time and technology of electric device control character, development gives all sorts of products, be like cabinet and efficient compact turn fluid machinery and permanent magnetism motor. The air-blower that uses what the Electromechanical unifinication branch of the company of occurrence EBARA Densan of technical difficult problem is developing in cell of fuel of small-sized family expenses must have the advantage of efficient, low cost and service life of train in excess specified length, this goes out to be not taken with respect to demand development when the double axis of gear is discharging air-blower of quantity screw type. Graph the rotor of air-blower of 1 fuel cell and crust " we used device of a clench the teeth (graph 1) medium two screw rotor. But in fact, these lamina are elaborate design, won't mutual contact. This asks to have the accurate mold of high accuracy in production process. " Mr YASUO NARUI of branch of unifinication of Electromechanical of EBARA Densan company expresses. The aluminous material besides convention (graph 2) besides, the production material of rotor becomes increasingly diversification (if heat up solid sex colophony) , this makes they " the experience that uses us very hard to design and machine a respect to accumulate in convention before. " answer measure as a kind, they must undertake canvass to appearance in inchoate phase, will detect any blemish feedback that give are mixed to die design, treatment mould flow. Graph rotor of 2 aluminous qualitative screw need not the blame contact that spray and the company of 3D scanner EBARA Densan that stick a point introduced Kenikamei to be able to be amounted to 3D scanner RANGE7, use at be in to shape level undertakes appearance is evaluated. This company also considered the scanner of other trademark, but these products need to cost too much time to measure data and CAD data quite, and the requirement that cannot obtain a company. More important is, any mould mistakes that the digitlization with accurate height exceeds accurate rotor to test and verify and blemish are indispensable. Stem from this reason, should be in need not use the case that defends reflection coating to fall, undertake scanning to aluminium and other and shining material. The solution of the is not RANGE7 of contact 3D scanner to satisfy them namely strict requirement of newest model, these requirements include to use a sex accuracy, easily, and the function that measures shining surface, and scanner of use tradition optics undertakes very hard metrical to shining surface normally. "Want to seek to be accomplished truly before early need not the spray developer, 3D scanner that need not stick a label to nod, but did not appear all the time on the market, till RANGE7 appear on the market, its expression makes a person fab. " at the same time, mr NARUI still expresses, "RANGE7 is in economy is efficient sexual respect is very outstanding also " . Nextpage detects in inchoate phase if the limitation that exceeds accurate rotor detects in producing archetypal dimension to detect fall vacant defect, can be in inchoate phase designs these blemish feedback to die and machine a method, improve development efficiency successfully thereby. While EBARA Densan company is using RANGE7, matched appearance detects software RapidformXOV, help them be in shape level detects the limitation that exceeds accurate screw rotor. The process is as follows: (1) guide in RapidformXOV software CAD designs data, make detect plan (include GD/T, detect the report) . (2) after opening a model to finish, try make screw rotor; Cooperate automatic revolving stage to come true with RANGE7 full automatic the scanning that change and global joining together, get scanning data. (3) guide scanning data RapidformXOV, before carrying out, define detect in the plan, software undertakes CAD designs data and scanning data automatically quite, finish all measurement to work, generated colour plan shows etc detect report. (4) the analysis detects report, locate defect, feedback designs end to the mould, undertake building a model (graph 3) . Graph 3 in shape level detects exceed sketch map of process of blemish of accurate screw rotor and tradition to detect gimmick photograph is compared, RANGE7 can shorten greatly time and cost, come true a few cannot replace detect method. And compare with other scanner, use RANGE7 need not spray developer and stick a point, eliminated the ply error that developer causes, reduced workload, reduced environmental pollution; It is OK that the use of automatic revolving stage lets operate personnel to bolt not only complete whole scanning process, more the factitious error in eliminating scanning process, those who realized 3D scanning " goofy type " operation. To colophony drill, RANGE7 also can change with the dimension after shaping at catching colophony, and understanding mould circumstance. Especially the advantage that RANGE7 can sweep draw tall burnish and black surface makes it can detect not only product itself, still can measure a mould directly, the appearance that this makes for the mould is corrected offerred new thinking, and in these respects, design and treatment are relied on normally before experience. Mr NARUI (graph 4) express, the company expands the applied limits of RANGE7 of purpose. "Besides screw rotor, we still will enlarge the applied limits of RANGE7 to crust, bearing, nozzle and other part. Shape through be in level undertakes dimension is evaluated, our expectation RANGE7 can be helped improve development efficiency, undertake production methodological inspection, reduce the cost of the component. " Mr NARUI of graph 4EBARA Densan and Mr HONZUMI (researcher) the advantage of RANGE7 is restricted as a result of optical principle place, all the time since, contact of dispute of surface of scanning tall burnish the bottleneck of 3D scanner. Japanese Ni Kamei stalking or branch can amount to company limited research and development to give the first to be able to be in in April 2008 not below the premise of spray developer, the blame contact of surface of successful scanning tall burnish 3D scanner. In April 2009, kenikamei can amount to a company to grind again give out another technology -- surface of scanning black object. Because black object surface is right Yu Guang's reflectivity is extremely low, cannot become almost picture, because this and tall burnish appearance are same, when scanning black object, contact 3D scanner is not to need spray developer before. Accordingly, kenikamei can amount to RANGE7 to make the whole world the blame contact of function of the first successful and compositive Gao Guangze and scanning of black object surface 3D scanner. Kenikamei can amount to the foundation in the optical workmanship with long inheritance to go up, cooperate accurate mechanical design and advanced electronic technology, the mass that employed high-powered CMOS sensor to offer high accuracy for RANGE7 assures. More crucial is, the ball plan that the precision standard of RANGE7 recommends strictly according to VDI/VDE 2634 standard detects the method comes demarcate, its precision passes actual measurement, already reached the whole world banner level, can ensure the client is making the tall accurate sex of the domain and high reliability. Because Nextpage is tall burnish surface forms specular reflection light easily, the energy that makes incident reflection answers 3D scanner is very weak, cannot form valid 3D scanning data. So normally must the diffuse reflection that spray developer will come to raise sample appearance, achieve the goal that raises reflection energy thereby. And because laser has light to nod the characteristic with concentration of small, energy, tall precision, get stronger reflection energy more easily than traditional Bai Guangrong, use the VIVID 9i of the generation before Kenikamei can be amounted to so, can have gotten data of scanning of tall burnish surface. But complex to exterior structure tall burnish object (graph 5a) , have the sample of concave side especially, put in multiple reflex problem, form a large number of a confusion of voices to nod (graph 5b) great the accuracy that affected scanning data and dependability. And while the RANGE7 of new generation was using the sensor of taller sensitivity, creativity ground was invented " multiple reflex eliminates a technique " , the difficult problem that solved scanning of object of tall burnish surface (graph 5c) . The map is for in 5 graphs the sample of tall burnish surface of multiple reflex problem (A) , data of scanning of use VIVID 9i still is put in multiple reflex a confusion of voices to nod (B) , and the settlement with successful data of use RANGE7 scanning multiple reflex problem (C) when the sample when scanning, RANGE7 launchs a sheet only exploration laser bundle, and smooth scanner of more traditional structure wants its frequency low much. Stimulate beam of light to be able to scan directly sample surface, also can pass sample surface raised or cave after place is reflexed, indirect illuminate arrives on sample, reflex again come back. Former we are called " direct reflex " , latter is called " multiple reflex " . The light that final scanner accepts is " direct reflex " with " multiple reflex " overlay. Want to get accurate data, must want to be eliminated " multiple reflex " composition. When RANGE7 is undertaking the analysis of time axis to reflexing the energy that come back, can discover " direct reflex " the buy of time position of axle of the peak value of composition and " multiple reflex " the buy of time position of axle of composition is not of coincide (graph 6) , this is eliminate " multiple reflex " composition offerred a possibility. RANGE7 was used a series of technical measure, if threshold value filters, time axle control and 3D data detect point-blank the accuracy that waits for a technology to assure to measure tall burnish surface and dependability. Graph the signal intensity that 6 centers nod like element, time pursues and for smooth to other use construction 3D scanner, because give out, is smooth signal of high-frequency sine wave, so overlay of much emissive light, direct reflex, multiple reflex is together, have problem of signal overlay saturation possibly already, have phasic deflection and low amplitude problem possibly again, so very difficult " multiple reflex " composition comes off come out. CNC Milling CNC Machining