The Accuracy Control Of The RP/RT Integrated Manufacture System

Rapid Prototyping Technology(RP), which is based on Material Increase thought, can rapidly and directly produce three-dimensional objects from CAD model. And the Rapid Tooling Technology(RT), which is based on RP, can make RP to get physical products. The integration of the two technologies can get a certain manufacturing capacity and shorten the time of a new product being put on the market. Hence, an undertaking can reduce its cost and increase its competition ability. The accuracy of the RP/RT integrated manufacture system is a key issue concerning its popularity.Here in the essay, the author takes Stereo Lithography Apparatus (SLA) and silastic mould integrated manufacturing system as an example, divides the whole course of the manufacture into five steps: Pre-processing, Laminating Free Form Abrication, Post-processing, the course of reproducing silastic mould from Rapid Prototyping and the manufacture of finished parts from silastic mould. Factors affecting the manufacture accuracy occuring in every step and the related control measures are specifically and completely illustrated. An closed error link is established in the form of the size link, which consists of errors occurring in every manufacture step of the RP/RT Integrated Manufacture System and error compensation. On the basis of the control over errors occurring in every manufacture step, the well-trained BP Neural Network is pre-stationed to the RP/RT Integrated Manufacture System and an optimum controllable input is drawn which can make the RP/RT Integrated Manufacture System produce a standard product, and the manufacture accuracy of the RP/RT Integrated Manufacture System can be controlled off line. And this error-control method is tested in laboratory and in production.