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93.What is rapid prototyping?

With the development of the technology, rapid prototyping has became very popular in industry. So many people want to know more things about rapid prototyping.

Rapid prototyping is a digital modeling process, which is a real physical model of a component that is entirely created directly from a 3D CAD drawing. Rapid prototyping systems generate quick prototypes by constructing an additive and layer-by-layer process that is driven by 3D CAD data. Rapid prototyping is also known as desktop manufacturing or free-form fabrication. Rapid prototyping machines require STL data files, which are generated by the CAD system. An STL file is a data file format designed specifically for rapid prototyping machines. Any rapid prototyping system can use the STL file from any type of 3D CAD system that outputs the STL data. Rapid prototyping machines operate quite differently than typical CNC machines. Rapid prototyping machines are subtractive in nature, because they join together liquid, powder and sheet materials to form complex forms. Using layer-by-layer technology, rapid prototyping systems fabricate plastic, wood, ceramic or metal objects based on several cross-sections from a 3D CAD model.

Rapid prototyping cannot be mistaken by rapid manufacturing or rapid tooling ; however, all the above mentioned processes involve 3D CAD files. RM is a rapid manufacturing process. RM is an ultimate process that manufactures parts directly from a computer. The benefits of any rapid processes are that fewer steps are required to achieve the final result .