How to use rapid prototyping technology to achieve rapid precision manufacturing of auto parts

Principles of rapid prototyping technology.

Rapid prototyping technology is an important branch of advanced manufacturing technology, which is not only reflected in the breakthrough in manufacturing ideas and implementation methods, but more importantly, it has also made great progress in the quality, performance, size and production speed of the parts. It is a forming method based on the principle of discrete stacking forming based on CAD cam technology, laser technology, numerical control technology and material science. The basic principle is:

Any 3D part can be regarded as a number of 2D planes superimposed along a certain coordinate direction, so the 3D solid model in the CAD system can be discretized into a series of plane geometric information, and the liquid (or solid) material can be selectively solidified layer by layer by means of bonding, fusion, polymerization or chemical reaction, so as to quickly stack the parts (or patterns) of the required shape. The manufacturing method is to continuously add material to the unfinished workpiece as needed until the part is made. Figure 1 illustrates the process of manufacturing a manufacturing process that makes the material grow rather than remove it.

Fig.1 Discrete stacking process of RP.

Rapid prototyping technology, also known as rapid prototyping manufacturing (RPM) technology, was born in the late 80s of the 20th century, and is a high-tech manufacturing technology based on the material stacking method, which is considered to be a major achievement in the manufacturing field in the past 20 years. It integrates mechanical engineering, CAD, reverse engineering technology, layered manufacturing technology, numerical control technology, material science, and laser technology, which can automatically, directly, quickly and accurately transform design ideas into prototypes with certain functions or directly manufacture parts, thus providing an efficient and low-cost means of realization for parts prototyping and verification of new design ideas. In other words, rapid prototyping technology uses 3D CAD data to stack layers of materials into solid prototypes through rapid prototyping machine code shielding.

Rapid prototyping technology, also known as rapid prototyping manufacturing (RPM) technology, was born in the late 80s of the 20th century, is a high-tech manufacturing technology based on the material stacking method, and is considered to be a major achievement in the manufacturing field in the past 20 years. It integrates mechanical engineering, CAD, reverse engineering technology, layered manufacturing technology, numerical control technology, material science, and laser technology, which can automatically, directly, quickly and accurately transform design ideas into prototypes or directly manufactured parts with certain functions, thus providing an efficient and low-cost means of realization for part prototyping and verification of new design ideas. In other words, rapid prototyping technology uses 3D CAD data to stack layers of materials into solid prototypes through rapid prototyping machines.

Features of rapid prototyping technology.

1) There is no limit to the materials used in the manufacture of prototypes, and all kinds of metallic and non-metallic materials can be used;

2) The replicability and interchangeability of the prototype are high;

3) The manufacturing process has nothing to do with the geometry of the manufacturing prototype, which is more advantageous when the lead is complex and early in the early section;

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, which can realize the integration of design and manufacturing;

Okay, that's clear.

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The application of rapid prototyping is mainly reflected in the following aspects:

1. Design verification and functional verification in the process of new product development. RP technology can quickly convert the CAD model of product design into a physical physical model, easily verify the rationality, assemblyability and aesthetics of the designer's design idea and product structure, and find that the problems in the design can be modified in time.

2. Manufacturability, assembly, inspection, supply inquiry, market promotion, complex system with limited space. For complex parts, trial production can be carried out with RP, technology to determine the best reasonable process. In addition, RP prototypes are an effective means of communication in all aspects of the product, from design to commercialization.

3. Direct production of single pieces, small batches and special complex parts. For polymer material parts, high-strength and molded engineering plastics can be used for direct rapid molding to meet the use requirements. For complex metal parts, they can be obtained by rapid casting or direct metal fitting molding.

4. Rapid mold manufacturing. Through various conversion technologies, RP prototypes are converted into various rapid molds, such as low melting point alloy molds, silicone molds, metal cold spray molds, ceramic molds, etc., for the production of small and medium-sized batches of parts.