机械工程专业英语-李光布lesson14-CAM
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Lesson14 CAM Introduction
computer—aided manufacturing involves the use of computers and computer technology to
assist in all the phases of manufacturing a product，including process and production planning，
machining，scheduling，management，and quality contr01．Because of the benefit，computer。
aided design and computer—aided manufacturing are often combined into CAD／CAM systems’
show as Figure 2．12．
Figure 2．12 Information flow chart in CAD／CAM application
This combination allows the transfer of information from the design stage into the stage of
planning for the manufacture of a product，without the need to reenter the data on part geometry
manually．The database developed during CAD is stored，then it is processed further，by OAM，into
the necessary data and instructions for operating and controlling production machinery，
material．handling equipment，and automated testing and inspection for product quality·
In machining operations，an important feature of CAD／CAM is its capability to describe the
tool path for various operations，such as NO turning．milling·and drilling r、+inn。 the tool path．The engineer or technician can then display and visually check the tool path for
possible tool collisions with clamps，fixtures，or other interferences．
The tool path can be modified at any time，to accommodate other part shapes to be
machined．CAD／CAM systems are also capable of coding and classifying parts into groups that
have similar shapes，using alphanumeric coding．
The emergence of CAD／CAM has had a major impact on manufacturing·by standardizing
product development and by reducing design effort，tryout，and prototype work．It has made
possible significantly reduced costs and improved productivity．The two—engine Boeing 777
passenger airplane，for example，was designed completely by computer(paperless design)，
with 2 000 workstations linked to eight computers．The plane is constructed directly from the
developed(an enhanced CATIA system)CAD／CAM software and no prototypes or mockups
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机械工程专业英语-李光布lesson14-CAM
