Vacuum Cavity Processing

Vacuum Cavity Processing

The vacuum chamber is a container that keeps the interior in a vacuum state. The production of the vacuum chamber should consider the volume, material and shape. Stainless steel is currently the main structural material for ultra-high vacuum systems. It has the advantages of excellent corrosion resistance, low outgassing rate, non-magnetic, good weldability, low electrical conductivity and thermal conductivity, and can work at -270-900 ℃. It is widely used in high vacuum and ultra-high vacuum systems.

In recent years, in order to reduce the manufacturing cost of the vacuum chamber, the use of cast aluminum alloy to manufacture the chamber has gradually become popular. In addition, there are many examples of using titanium alloys to make special-purpose vacuum chambers.

In order to reduce the surface area of the inner wall of the cavity, a flat surface is usually obtained by sandblasting or electropolishing. The cavity of the ultra-high vacuum system is more surface treated by electrolytic polishing.

Welding is one of the most important links in the manufacture of vacuum chambers. In order to avoid the chemical reaction between the molten metal and oxygen in the atmosphere and affect the welding quality, argon arc welding is usually used to complete the welding. Argon arc welding refers to spraying the protective gas argon around the tungsten electrode during the welding process to prevent the oxidation reaction of the molten high temperature metal. In principle, the argon arc welding of the ultra-high vacuum chamber must use internal welding, that is, the welding surface is on the vacuum side to avoid false leakage.

The surface of the inner wall of the vacuum chamber adsorbs a large number of gas molecules or other organic substances, which becomes the source of outgassing that affects the degree of vacuum. In order to achieve ultra-high vacuum, the cavity should be baked at a high temperature of 150-250 ° C to promote the gas on the surface and inside of the material to be released as soon as possible. The baking method includes wrapping the heating tape on the outer wall of the cavity, fixing the armored heating wire on the outer wall of the cavity, or directly placing the cavity in the baking tent. A relatively economical and simple baking method is to use a heating belt, and the outside of the heating belt is wrapped with aluminum foil to prevent heat loss and also make the cavity evenly heated.

Beijing Jinzhengmao Technology Co., Ltd. has professional vacuum chamber design and manufacturing technology, and manufactures chambers according to the high requirements of industrial and research centers for high vacuum and ultra-high vacuum processes or academic research equipment.

Beijing Jinzhengmao Technology Co., Ltd. is a design and manufacture supplier of vacuum chambers (boxes), customize vacuum chambers (boxes) according to customer-specific needs, analyze your needs to find suitable application designs, and have Good quality manufacturing quality assurance, assistance with installation and consulting on-site service solutions.

    Beijing Jinzhengmao Technology Co., Ltd. also produces and supplies a wide range of vacuum components and vacuum accessories, such as: vacuum flanges, vacuum accessories, vacuum bellows and sapphire vacuum windows, etc., which can be used in vacuum chambers (boxes) superior.