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一篇数控英文资料,详细介绍了数控的相关发展及应用

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发表于 2013-4-16 09:53:05 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
一篇数控英文资料,详细介绍了数控的相关发展及应用

Numerical Control
     
One of the most fundamental concepts in the area of advanced manufacturing technologies is numerical control (NC).Prior to the advent of NC, all machine tools were manual operated and controlled. Among the many limitations associated with manual control machine tools, perhaps none is more prominent than the limitation of operator skills. With manual control, the quality of the product is directly related to and limited to the skills of the operator . Numerical control represents the first major step away from human control of machine tools.

Numerical control means the control of machine tools and other manufacturing systems though the use of prerecorded, written symbolic instructions. Rather than operating a machine tool, an NC technician writes a program that issues operational instructions to the machine tool, For a machine tool to be numerically controlled , it must be interfaced with a device for accepting and decoding the programmed instructions, known as a reader.

Numerical control was developed to overcome the limitation of human operator , and it has done so . Numerical control machines are more accurate than manually operated machines , they can produce parts more uniformly , they are faster, and the long-run tooling costs are lower . The  development of NC led to the development of several other innovations in manufacturing technology:
1. Electrical discharge machining.
2. Laser cutting.
3. Electron beam welding.

Numerical control has also made machine tools more versatile than their manually operated predecessors. An NC machine tool can automatically produce……



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发表于 2014-3-22 08:31:41 | 只看该作者
数控技术的学习资料
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