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With the development and popularization of computer science, CAD technology, materials science and laser technology, it laid the material foundation for the emergence of new manufacturing technology. Rapid prototyping technology has emerged, and today we mainly introduce the background and classification of rapid prototyping technology.
With the formation of global market integration, the competition in the manufacturing industry is fierce, and the speed of product development has increasingly become a major contradiction. In order to meet the ever-changing user needs, the manufacturing industry requires strong flexibility in manufacturing technology, which can be produced in small batches or even in a single piece without increasing the cost of the product. In this case, the speed of product development and the flexibility of manufacturing technology are critical.
China Rapid Prototyping National Engineering Research Center and Rapid Prototyping Engineering Research Center of the Ministry of Education independently developed rapid tooling and rapid prototype technology, which became the strength of global competitiveness in manufacturing.
Rapid prototype technology mainly has the following principles and features:
1. The materials used for the prototype are not limited, and various metal and non-metal materials can be used;
2. The prototype is highly replicable and interchangeable;
3. The manufacturing process is independent of the geometry of the prototype, and is superior when machining complex surfaces.
4. The processing cycle is short, the cost is low, the cost has nothing to do with the complexity of the product, the general manufacturing cost is reduced by 50%, and the processing cycle is saved by more than 70%;
5. Highly technical integration, it can achieve integration of design and manufacturing.
Subtracted Forming
The subtracted forming is a processing method in which a separation method is used to form a part of the material in an orderly manner from the substrate. Traditional methods of machining such as turning, milling, grinding, and grinding are all removed. Removal molding is the most important form of molding in the manufacturing industry.
Adding Forming
Adding forming refers to a forming method that achieves part design requirements by sequentially adding materials by various mechanical, physical, or chemical methods.Adding forming is a typical representative of rapid prototype technology. It breaks through the traditional molding method and can quickly manufacture parts with arbitrary complexity. It is a very promising new manufacturing technology.
Forced Forming
Forced forming is a method of forming a material under the constraints of a specific boundary or external force . Traditional casting, forging and powder metallurgy are forced forming. Forced molding has not yet fully realized computer control, and is mostly used for blank forming and special material forming.
Growth Forming
Growth forming is a method of molding using the activity of biological materials. The development of biological individuals in nature is a growth molding, and the "cloning" technique is also a growth molding method in an artificial system. With the development of active materials, bionics, biochemistry, and life sciences, this forming method will be greatly developed and applied.
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