【正文】 , sometimes even need to deal with hundreds of millions of a point data sequence。 Through the modification and analysis, processing produces contour surface。 Geometric shape output will reach the next level processing。 Analysis geometry shape and samples, estimation of the overall difference. The most important is, software to allow users to 3d perspective way of displaying full work piece, it defines the shape of the work piece, no longer need to multiple perspective projection map, designers can directly on the surface outline for reprocessing, and processing workers can use electronic model machining. Postprocessing software through the following to shorten the time: in reverse engineering, through the smooth continuous curve surface of the Internet to improve quality。 Tell the preparation processing documents of the time。 Don39。t need archetype。 Using various analytical tools to improve product quality. Visible, using laser scanning data, then applies to collect samples Surfacer software generate high quality surface, directly in CAD system pared to surface modeling, can save a few weeks of development time. In addition, using laser scanner acquisition geometric data that can generate meet industrial standard format files, such as IGES, VDA FS, ISOG code, DXF and prescribed ASCII, CAD/CAM format, analysis package at least can support one of these formats. Manufacturing tooling and test it is both timeconsuming and costly process. Surfacer software for various plex shapes can quickly plete inspection samples, which makes it a key processing line digestion. Users can reference 3d model accurately adjust scan data in order to assess process work piece sample and required the difference between related variables, calculated, and the form of with co lour chart to display, so as to make clear and plete geometry size calibration description. Surfacer software rapid prototype module (RPM) can be quickly using digital data or using other system39。s surface geometry generating archetype, shortened thereby actual prototype digital cycle, new RPM fast tool greatly improve the level of the rapid prototyping technology. Therefore the author thinks, reverse engineering technology and CAD/CAM system plement each other. Current CAD/CAM system after decades of development, no matter from theory and practical applications are already very mature, in this case, the existing CAD/CAM system will not and cannot in order to meet the special requirements of reverse engineering modeling the underlying structure from the system change. On the other hand, reverse engineering technology used in the large modeling method can reference existing CAD/CAM system, not need additionally build new platform. Based on the analysis, we think that reverse engineering technology throughout the manufacturing system chain in a position of affiliate, aided modeling, it can use existing CAD/CAM system, and to help them realize their own can39。t finished work. With this understanding, we can understand why reverse engineering (including the corresponding software) always not on the market, but most mainstream CAD/CAM system and all include the reverse engineering module or thirdparty packages such a situation. Domestic an enterprise in order to strengthen the enterprise petitiveness, to save development time, plan to in the original design of the pump body based on design again. Reverse engineering technology in which has played a pivotal role. In practice, the main steps in the cloning process sample parts are as follows: The geometric type surface original data access. Use LACUSE150B laser scanner directly from the model, with CCD (photoelectric coupled) way to acquire some data. For the collected data necessary filtering and corrections, eliminate measurement process because of various factors and sample parts surface defects and errors, so as to achieve construct sample parts of the original geometric model data. To the measured data necessary mathematics fitting, provide basic data for further 、Due to the use of sample pump body, a long time has changed in some change, so the application of parts based on the understanding of fully functional, through the sample parts to redesign the original data necessary correction, and generate a new pump body parts geometric digital model. Using a digital model for parts generated the handboard model manufacture. On board parts of geometry and application functions, if the result is bad, inspection according to actual condition, with industrial sludge in handboard model on the basis of parts manual perfect, reuse laser scanning retrieves data model. Repeat steps 4work. The reproduced parts mould processing and manufacturing, using numerical control machine tool plex curved surface processing. Undertake trying to mold in the pump body mold, parts of geometry and application function testing. In the whole reproduction, in order to guarantee the precision and accuracy, copy of the cloning process in the following aspects:The consideration from the Angle of parts, and a prehensive consideration application sample parts and whole again the data acquisition, in order to improve the design process data acquisition and copy precision and efficiency of the 、Comprehensive consideration of the measurement technology, manufacturing process, this can effectively control caused by manufacturing process of error, and improve the precision of the whole the cloning process. Because of the plexity of the sample parts, so copy parts inspection is the reverse engineering should cause enough attention in a ring, is the key to success. Fully understand the sample parts working environment and its function in the cloning process, can learn advanced things, improve and enrich him. Introduced above just part of reverse engineering application, according to relevant material reports, reverse engineering can also be used in many fields. Damaged or worn parts of reductio