Eビーム溶接の真空測定 - Fredericks Company

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

E-Beam溶接には、AMS2680とAMS2681の2つの関連するAMS規格があります。それぞれ1*10^-4Torrと1*10^-3Torrの真空度を要求している。これらは航空宇宙仕様であることに注意してください。真空度とシステムの要求精度に応じて、Televac の真空度測定にはいくつかのオプションがあり、重要な違いは以下の通りです。

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).

The second option is to separate the control electronics from the physical sensor. This can be ideal if you need or want a remote display somewhere else on your E-Beam welder. The ideal solutions for this are the MV2A and 2A sensor if you only need measurement down to 1*10^-3 Torr, or the MX200 with a 2A/4A (again for rough vacuum measurement down to 1*10^-3 Torr) combined with a 7B for medium and high vacuum measurement (down to as low as 1*10^-7 Torr). Depending on which controller you choose (MV2A or MX200), you’ll have optional outputs of an analog 0 to 5 V signal, an analog 0 to 10 V signal, RS-232 communications, RS-485 communications, EthernetIP, or PROFINET communications.

単位について迷っていますか？そんなことはありません。ここでは、Torrから他の一般的な測定単位への簡単な変換をいくつか紹介します（その他の変換については、単位変換をご覧ください）。

1 Torr = 1.33mbar

1 Torr = 1 mm Hg

1 Torr = 1.33 * 10^-1kPa

Not sure which product to choose? Use our Product Selection Guide, contact us online, call us at +1 215 947 2500, or chat with us using the window located at the bottom right of this screen!

Eビーム溶接は、大気中でも行うことができることに注意してください。ビームは大気中の異なる分子/ガスに当たることで散逸するため、溶接部の幅が一般的に広くなり、特定の用途には適していない場合があります。