电子束焊接的真空测量

E-beam welding is a process where a high energy beam of electrons from an electron gun is accelerated and focused using electric and magnetic fields, and shot at two materials to join them. The kinetic energy of the electrons creates very high heat which melts the two materials together (electrons are particles with a very small mass, 9*10^-31 kg or 2*10^-30 lbs to be exact). The electron beam requires that the system be under vacuum to maintain the speed and focus of the electrons thus preventing beam dissipation or scattering (without vacuum, the electrons would run into other molecules in the atmosphere like nitrogen, oxygen, and water vapor, among others). This is where Televac^® vacuum gauging comes in, to make sure that the system is under sufficient vacuum to operate correctly.

Vacuum Gauging Equipment for E-Beam Welding

当涉及到电子束焊接时，有两个相关的AMS规范，AMS 2680和AMS 2681。它们分别要求两个不同的真空度为1*10^-4Torr和1*10^-3Torr。请注意，这些都是针对航空航天规格的。根据系统的真空度和精度要求，Televac真空测量有几种选择，重要区别如下。

The first option is an active gauge solution. With an active gauge, the control electronics are attached directly to the physical sensor, then there are optional outputs to show the vacuum level including an analog 0 to 10 V output, RS-485 communications, EthernetIP, or PROFINET communications. The active gauges that would be used for E-Beam welding are an MX2A or MX4A (thermocouple vacuum gauges) for measurement from 1000 Torr down to 1*10^-3 Torr and then an MX7B (cold cathode vacuum gauge) for measurement from 1*10^-3 Torr and deeper vacuum (as low as 1*10^-8 Torr).

第二种选择是将控制电子元件与物理传感器分开。如果你需要或想在电焊机上的其他地方有一个远程显示器，这可能是理想的选择。理想的解决方案是MV2A和2A传感器，如果你只需要测量低至1*10^-3Torr，或者MX200与2A /4A（同样用于低至1*10^-3Torr的粗真空测量）和7B相结合，用于中高真空测量（低至1*10^-7Torr）。根据您选择的控制器（MV2A或MX200），您可以选择模拟0至5V信号、模拟0至10V信号、RS-232通信、RS-485通信或EthernetIP通信的输出。

对单位感到困惑？不用担心！下面是一些从托到其他常用计量单位的简单换算（如需更多换算，请查看我们的单位换算器）：

1托尔=1.33毫巴

1托尔=1毫米汞柱

1托尔=1.33*10^-1千帕。

不确定该选择哪种产品？请使用本屏幕右下方的窗口与我们聊天，给我们打电话：+1 215 947 2500，或给我们发电子邮件：[email protected]!

请注意，电子束焊接也可以在大气中进行。由于光束在大气中碰到不同的分子/气体会发生耗散，因此焊缝通常较宽，这可能不适合某些应用。