Based on reverse engineering the design of rapid tooling Shield
Coal Mine Machinery products are the core of equipment, performance and quality of its direct impact on coal production and safety. And coal mines and the working environment of the special requirements of machinery has a strong ability to adapt, so a variety of protective devices in the coal mining machinery products have been widely used.
In the shield design and manufacturing process are often faced with like-kind pieces, rather than off-the-shelf CAD model. This requires a certain way through these physical model into a CAD model, and then use it to mold development. Current starting from sample kind of mathematical model of product technology has been become a CAD / CAM in a relatively independent areas, known as reverse engineering (reverse engineering). Based on reverse engineering and rapid tooling design products has become shorter development cycle and an important means to reduce costs.
Measurement of the available data is divided into three main categories: contact measurement, non-contact measurement, layer-by-layer scanning. Contact one of the high measurement precision, but low efficiency, for some items can not be measured easily deformed; non-contact measurement of high efficiency, can be excluded from the friction generated by the error, but a slightly lower relative accuracy; layer-by-layer scanning products are used in the internal scan occasions, products for the average non-contact measurement methods are most commonly used.
Under the surface of the data forming machine collection information to restore the original surface of the geometric model, known as surface reconstruction. In reverse engineering, there are two kinds of surface structure Methods: B-spline or NURBS surface based on surface structure of the program; to triangular Bezier surfaces surface-based program structure. Now a mature software reverse engineering step surface reconstruction is generally point cloud data processing, data triangulation, curve fitting and surface construction of
