Second-exploitative Function For Motor Lamp's Reverse Engineering

In Reverse Engineering, 3D data measurement accuracy directly determine the accuracy of product reverse form, So some factors that affect the veracity should be improved, one of the important factors is the measured error. Coordinate Measuring Machines are the mostly used measuring tool, it would bring an origin reference locating error besides the error brought by the manufacturing error. The main reason of the origin reference locating error is the difficult operation and the unreasonable method. In order to improve veracity of the measured data, some modification should be done to the method of the origin reference locating.One of the important processes in product's Reverse Engineering is transforming the measuring data to products CAD models. Because of large numbers of measured data and complex shape of the product, the product's reverse modeling not only needs good command of modeling skills and plenty of modeling experience, but also the work is tiring and inefficient. Thus affect the period of exploit new products, and new modeling method is needed.In order to improve the error bought by origin reference locating, we introduce a new method that using entity's center as the origin point. This method uses many points on the surface of the entity to calculate entity's center, and the center can be used as the origin point. The entity include two cubes, column, sphere and so on. This method can also be used in data's relocating proceed, using three or more entity's centers as the origin points can improve the measured data's veracity greatly.In order to eliminate problems in motor lamp's reverse modeling, we exploit many auto-modeling programs, which under the environment of 3D software UG and its secondary exploit language Open GRIP. These programs base on reverse modeling experience and reasonable including geometric construction, and can make the proceed of motor lamp's modeling automatic;also can improve the efficiency of lamp's modeling. These program include curve fit gradually , motor lamp's ceverberator astigmatism surface fit automatically, astigmatism veins modeling, line fit, distance checkout , curve adjust and so on. We will introduce every programs in details including geometric construction , modeling principle , difficulties and the theoretic basic to solve the difficulties. Experiments show that these programs can greatly improve modeling efficiency and shorten the period of exploit new products.