数控火焰气割的基本常识

中文译文
数控火焰气割的基本常识(中文4500字,英文3200字)
（一） 气割的基本工作原理及气割的过程
利用气体火焰的热能将工件切割处预热到一定温度后，喷出高速切割氧流，使其燃烧并放出热量实现切割的方法，叫气割。
氧气切割过程有下列三个阶段：
1、预热  气割开始时，利用气体火焰(氧乙炔焰、氧丙烷焰)将工件待切割处预热到该种金属材料的燃点(对于低                          碳钢约为1100～1150℃)。
2、燃烧  喷出高速切割氧流，使已达燃点的金属在氧流中激烈燃烧。
3、吹渣  金属燃烧生成的氧化物被氧流吹掉，形成切口，使金属分离，完成切割过程。
（二） 气焊、气割用设备的组成
气焊、气割用设备由氧气瓶、氧气减压器、乙炔瓶(乙炔发生器)、乙炔减压器、回火保险器、焊炬(割炬)和橡胶管等组成。
（三）什么样的割口是好的
切割后的割口面 中间泛白 没有疤痕 割口不带废渣 没有烧边现象
（四）可以气割的金属应符合下述条件：
    1）金属氧化物的熔点应低于金属熔点。是一些常用的金属及其氧化物的熔点。

2）金属与氧气燃烧能放出大量的热，而且金属本身的导热性要低。

英文原文
CNC flame cutting basic common sense
   The basic knowledge of CNC flame gas cutting
   (A) the basic working principle of gas cutting and gas cutting process
Heat using a gas flame cutting the workpiece is preheated to at a certain temperature, the discharge speed cutting oxygen stream, so that combustion and gives off heat to achieve cutting method is called torch cutting.
   The oxygen cutting process has the following three stages:
   1, the beginning of the preheating gas cutting, using a gas flame (oxygen-acetylene flame, oxygen, propane flame) of the workpiece to be cut at the ignition of the metal material is preheated to approximately 1100 to 1150 ° C) (For low carbon steel.
Combustion emit high-speed cutting oxygen flow reached lighted metal intense burning in an oxygen stream.
   3, blowing slag metal oxide combustion generated by the oxygen stream to blow off the incision is formed, so that the metal separation, the completion of the cutting process.
   (B) gas welding, gas cutting equipment used in the composition of the
Gas welding, gas cutting equipment, oxygen bottles, oxygen regulator, acetylene bottles (acetylene generator), acetylene regulator, the tempering insurance, torch (torch) and rubber tube.
  (C) what is good notched
Cutting the middle of the notched surface after the whitening did not burn scar notched without waste side of the phenomenon
  (D) gas cutting metal shall comply with the following conditions:
   1) the melting point of the metal oxide should be less than the melting point of the metal. Table 1 - 1 are some common melting point of the metal and its oxide.
   2) metal with oxygen combustion can release a lot of heat, and the thermal conductivity of the metal itself.
   The gas cutting conditions metal iron, low carbon steel, medium carbon steel and low alloy steel and titanium. Other commonly used metals such as cast iron, stainless steel, aluminum and copper, etc., must use special method or melting method of oxyfuel cutting.