求一篇3000字左右机械方面的英语文章，要求有出处，

最新问答

• 金凯瑞砖家

  我也要，谢谢 ，急用 376943491@qq.com

  浏览 236赞 125时间 2023-11-02
• 正在复制843111

  A machine tool is a powered mechanical device, typically used to fabricate metal components of machines by machining, which is the selective removal of metal. The term machine tool is usually reserved for tools that used a power source other than human movement, but they can be powered by people if appropriately set up. Many historians of technology consider that the true machine tools were born when direct human involvement was removed from the shaping or stamping process of the different kinds of tools. The earliest lathe with direct mechanical control of the cutting tool was a screw-cutting lathe dating to about 1483.[1] This lathe "produced screw threads out of wood and employed a true compound slide rest".
  
  The first machine tools offered for sale (i.e. commercially available) were constructed by one Matthew Murray in England around 1800.[2]
  
  Contents [hide]
  1 Overview
  2 Examples
  3 See also
  4 References
  5 Bibliography
  6 Further reading
  7 External links
  
  [edit] Overview
  Machine tools can be powered from a variety of sources. Human and animal power are options, as is energy captured through the use of waterwheels. However, modern machine tools began to develop only after the development of the steam engine, which led to the Industrial Revolution. Today, most machine tools are powered by electricity.
  
  Machine tools can be operated manually, or under automatic control. Early machines used flywheels to stabilize their motion and had complex systems of gears and levers to control the machine and the piece being worked on. Soon after World War II, the numerical control (NC) machine was developed. NC machines used a series of numbers punched on paper tape or punch cards to control their motion. In the 1960s, computers were added to give even more flexibility to the process. Such machines became known as computerized numerical control (CNC) machines. NC and CNC machines could precisely repeat sequences over and over, and could produce much more complex pieces than even the most skilled tool operators.
  
  Before long, the machines could automatically change the specific cutting and shaping tools that were being used. For example, a drill machine might contain a magazine with a variety of drill bits for producing holes of various sizes. Previously, either machine operators would usually have to manually change the bit or move the work piece to another station to perform these different operations. The next logical step was to combine several different machine tools together, all under computer control. These are known as machining centers, and have dramatically changed the way parts are made.
  
  From the simplest to the most complex, most machine tools are capable of at least partial self-replication, and produce machine parts as their primary function.
  
  [edit] Examples
  Examples of machine tools are:
  
  Broaching machine
  Drill press
  Gear shaper
  Hobbing machine
  Hone
  Lathe
  Screw machines
  Milling machine
  Shaper
  Saws
  Planer
  Stewart platform mills
  Grinding machines
  When fabricating or shaping parts, several techniques are used to remove unwanted metal. Among these are:
  
  Electrical discharge machining
  Grinding (abrasive cutting)
  Multiple edge cutting tools
  Single edge cutting tools
  Other techniques are used to add desired material. Devices that fabricate components by selective addition of material are called rapid prototyping machines.
  
  Several regions of the United States became centers for machine tool development ween 1800 and 1950, including Philadelphia, Pennsylvania; Cincinnati, Ohio; Rockford, Illinois; Providence, Rhode Island] Springfield, Vermont; Windsor, Vermont; Hartford, Connecticut; and Bridgeport, Connecticut.

  浏览 390赞 62时间 2023-05-07
• 水金之幻

  A machine tool is a powered mechanical device, typically used to fabricate metal components of machines by machining, which is the selective removal of metal. The term machine tool is usually reserved for tools that used a power source other than human movement, but they can be powered by people if appropriately set up. Many historians of technology consider that the true machine tools were born when direct human involvement was removed from the shaping or stamping process of the different kinds of tools. The earliest lathe with direct mechanical control of the cutting tool was a screw-cutting lathe dating to about 1483.[1] This lathe "produced screw threads out of wood and employed a true compound slide rest".
  
  The first machine tools offered for sale (i.e. commercially available) were constructed by one Matthew Murray in England around 1800.[2]
  
  Contents [hide]
  1 Overview
  2 Examples
  3 See also
  4 References
  5 Bibliography
  6 Further reading
  7 External links
  
  [edit] Overview
  Machine tools can be powered from a variety of sources. Human and animal power are options, as is energy captured through the use of waterwheels. However, modern machine tools began to develop only after the development of the steam engine, which led to the Industrial Revolution. Today, most machine tools are powered by electricity.
  
  Machine tools can be operated manually, or under automatic control. Early machines used flywheels to stabilize their motion and had complex systems of gears and levers to control the machine and the piece being worked on. Soon after World War II, the numerical control (NC) machine was developed. NC machines used a series of numbers punched on paper tape or punch cards to control their motion. In the 1960s, computers were added to give even more flexibility to the process. Such machines became known as computerized numerical control (CNC) machines. NC and CNC machines could precisely repeat sequences over and over, and could produce much more complex pieces than even the most skilled tool operators.
  
  Before long, the machines could automatically change the specific cutting and shaping tools that were being used. For example, a drill machine might contain a magazine with a variety of drill bits for producing holes of various sizes. Previously, either machine operators would usually have to manually change the bit or move the work piece to another station to perform these different operations. The next logical step was to combine several different machine tools together, all under computer control. These are known as machining centers, and have dramatically changed the way parts are made.
  
  From the simplest to the most complex, most machine tools are capable of at least partial self-replication, and produce machine parts as their primary function.
  
  [edit] Examples
  Examples of machine tools are:
  
  Broaching machine
  Drill press
  Gear shaper
  Hobbing machine
  Hone
  Lathe
  Screw machines
  Milling machine
  Shaper
  Saws
  Planer
  Stewart platform mills
  Grinding machines
  When fabricating or shaping parts, several techniques are used to remove unwanted metal. Among these are:
  
  Electrical discharge machining
  Grinding (abrasive cutting)
  Multiple edge cutting tools
  Single edge cutting tools
  Other techniques are used to add desired material. Devices that fabricate components by selective addition of material are called rapid prototyping machines.
  
  Several regions of the United States became centers for machine tool development ween 1800 and 1950, including Philadelphia, Pennsylvania; Cincinnati, Ohio; Rockford, Illinois; Providence, Rhode Island] Springfield, Vermont; Windsor, Vermont; Hartford, Connecticut; and Bridgeport, Connecticut. 给你

  浏览 266赞 122时间 2022-10-06
• 苏明zhsm13579

  最简单的办法 - - 你去找一篇中文的 然后人翻译

  浏览 309赞 67时间 2022-07-15
• 英式风情茶

  您好，您需要的3000字机械方面的英语文章（有出处）的文件已发至您的邮箱，请查收！希望我的回答对您有帮助，感谢您的支持，谢谢！

  浏览 372赞 77时间 2021-12-19