Rapid prototyping and part manufacturing technology (3)

Third, the unique characteristics of RP&M technology

RP&M technology is different from traditional removal forming (such as turning, milling, planing, grinding, etc.), assembling (such as welding), or forced forming (such as casting, forging, powder metallurgy) and other processing methods, but using material accumulation Prototyping parts prototypes, rapid prototyping technology demonstrates the advantages of the following aspects over many traditional processing methods. (1) Directly driven by the CAD model, it is of great significance to shorten the product development cycle, reduce development costs and improve the competitiveness of the enterprise market by automatically, quickly and accurately transforming the design ideas into product prototypes of certain functions or even directly manufacturing parts.

(2) It is possible to quickly and directly produce arbitrarily complex parts without any tools, molds and tooling fixtures, without the limitations of the tools in the conventional machining methods.

(3) In the process of surface manufacturing, the transformation (layering) of CAD data can be fully automated, rather than the need for sophisticated manual technicians in CNC machining to convert into complete process NC code.

(4) The processing of arbitrarily complex parts is only required to be performed on one piece of equipment, and no preparation work such as conventional tools or tooling is required. The development cost and cycle of new products have been greatly shortened, and the processing efficiency is far better than that of CNC machining.

(5) Equipment investment is lower than CNC machine tools.

(6) No intervention or less intervention during the forming process.

Fourth, the application of RP&M technology

The application of RP&M technology is developing rapidly. A notable indicator is the rapid increase in the number and revenue of RP&M service organizations. In the mid-to-late 1990s, the number of foreign RP&M services increased at a rate of 59% per year. It can be said that foreign countries have entered the RP&M as an important part of product development from the familiar, wait-and-see, and tentative application stages of RP&M processes, and improve products. The stage of developing quality and speeding up product development. Rapid prototyping technology greatly reduces the risk of new product development and shortens the development cycle of new products.

RP&M has been widely used in various fields of the national economy. In the early days of the RP industry, the automotive and aerospace industries dominated the RP market, which accounted for more than half of the market, but RP quickly introduced to other industries. It is currently used in general manufacturing, household appliances, aerospace, engineering structural model manufacturing, aesthetics and related engineering, medical rehabilitation and archaeology, and is still evolving into new areas.

Rapid Tooling technology developed in the manufacturing industry based on the RP system, Quick Casting and Quick Powder Sintering for fast parts Manufacturing. The following are some of the main aspects of RP&M applications. 1. Application in Product Design - Rapid Product Development The application of RPDRP&M in RPD is shown in Figure 1.

The key role and significance of RP&M in product development is obvious. We use CAD technology, rapid prototyping technology and rapid prototyping to complete the design and shape work, saving time and outstanding benefits. It is not subject to any limitations of complex shapes and can quickly turn a design on a computer into a physical prototype that can be further evaluated. The RP&M series of devices provides users with not only a conceptual model, but to a large extent, it provides products that can be fully validated from fit, assembly and performance testing.

The model generated by the RP is also a better intermediary for the communication between the design department and the non-technical department. Can significantly improve the success rate of new products into production. In view of this, foreign countries often use rapid prototyping systems as peripheral devices for CAD systems.

In general, using QRP&M rapid product development technology can reduce product development costs by 30% to 70% and reduce development time by more than 50%. For example, an automobile company adopts RP&M technology to meet the new emission standards of the country. The development cycle is shortened from 4 months to 1 month in the traditional method, which greatly shortens the time-to-market of its new products. Another example is that the optical camera body uses RP&M technology in only 3 to 5 days (from CAD modeling to prototyping), which costs 5000 marks, while the traditional method takes at least 1 month and consumes 30,000 marks.

At present, laser rapid prototyping technology has been maturely applied to product design evaluation and review, product engineering function test, etc., and has become a means of communication between manufacturers and customers.

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