CAD technology is an important part of advanced manufacturing technology, and it is the most influential high-tech application technology of computer technology in engineering design, machinery manufacturing and other fields. The development and application of the CAD system has caused profound changes in the traditional product design methods and production models, which have produced and will inevitably continue to produce huge social and economic benefits.
Since the 1990s, technicians engaged in scientific research and application development CAD have realized that the key to making CAD technology productive is to let designers use CAD systems. The National Science and Technology Commission has determined that the visual engineering goal of “甩图†is to realize the automation of graphic design as a breakthrough in the application of CAD technology. Practice has proved that this is an effective decision.
Today, computer network technology, CAD / CAM technology have a qualitative leap, CAD technology has laid a good foundation. In this situation, how to correctly understand the "scratch board", deepen the promotion and application of CAD technology, how to make a large number of small and medium-sized enterprises can also apply CAD technology and avoid mistakes in software and hardware investment, how to promote the application of CAD technology Providing better technical consulting services, these issues deserve to be carefully explored and analyzed.
1 Development of computer network technology and new technologies of network economy
Today's computer network is not just a simple connection of many computers, but more importantly, it is connected with countless information and people's intelligence. It fundamentally changed the way information was acquired, accepted and distributed, and changed the environment in which people live, work, study and cooperate. With the popularization of the Internet and Intranet, people are entering the era of intelligent networking. Some scholars believe that the so-called Knowledge Economy is actually the Network Economy, which is characterized by extensive interconnection within the organization, between enterprises and between social groups. Production and commercial activities are increasingly dependent on the network public. Information infrastructure [1, 2].
The new network organization structure fundamentally re-conceives the functions and nature of the organization and the relationship between them. This new organization is called Internetworked Enterprise, enabling enterprises to effectively obtain resources and work together. Activities such as off-site design and online operations are not only extended, but also connected to customers, suppliers, and even competitors [3]. This is the emerging digital economy and networked economy under the public network environment based on the Internet model. CAD technology will be a key technical support under this economic model. Understanding this point is beneficial for the continuous promotion and application of CAD technology.
2 The development trend of CAD technology
Understanding the development trend of CAD technology is very important to promote the application technology, which is conducive to the design and selection of CAD solutions to meet the needs of technological development. In general, the development trend of CAD technology has the following aspects:
(1) The CAD system based on the 32/64-bit microcomputer-based Windows operating system platform is popular, and software running on workstations such as Pro/E, I-DEAS, and CADD55 has also launched the microcomputer version.
(2) Integration of 2D drawing and 3D solid modeling, feature-based parametric design software should be the main functional requirements of CAD systems. At the same time, CAD is required to integrate with CAPP, CAM and CAE information, and provide product information model in line with IGES and STEP standards.
(3) The technical solution based on Windows/Objects/Wcb is an important feature of current CAD software, which means that CAD software can support collaborative design, off-site design and information sharing in the network environment.
(4) Integrated product digital management (PDM) integration supporting parallel design.
(5) Intelligent, visual and standardized CAD systems.
3 Deepening the problems of promoting the application of CAD technology
Before discussing and deepening the application of CAD technology, the above two aspects are proposed. The main point is that CAD technology is still an emerging technology and is still developing at a high speed. The driving force behind its development is that it promotes the development of productivity and brings efficiency to enterprises. However, in some places and some enterprises, the effect is not obvious. There are many reasons for this. The following questions are the main ones.
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Stainless steel round steel belongs to a class of long wood, also belongs to a class of bar, the so-called stainless steel round steel refers to the cross section of uniform circular long wood, generally about four meters long. It can be divided into light circles and black rods. The so-called light circle, refers to the smooth surface, after the quasi-rolling treatment; And the so-called black rod, refers to the surface of the black thick, hot rolled directly.
Stainless steel round steel can be divided into hot rolling, forging and cold drawing according to the production process. Hot rolled stainless steel round steel is 5.5-250 mm in size. Among them :5.5-25 mm small stainless steel round steel mostly to straight strips in bundles supply, commonly used for reinforcing bars, bolts and various mechanical parts; Stainless steel round steel greater than 25 mm, mainly used in the manufacture of machine parts or seamless steel pipe billets.
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