Welding nut is a kind of nut which is suitable for welding outside the nut. It is usually made of weldable material and is thicker and more suitable for welding. Welding is equivalent to turning two separators into a whole. The metal is melted at high temperature and then mixed together for cooling. The alloy is added in the middle. The internal force is the effect of molecular force and the strength is generally ratio. Maternal strength.
Production process editor
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The welding nut is a fastener with internal threads used in conjunction with bolts. A mechanical part that has internal thread and is used in conjunction with a screw to transmit motion or power.
Standard editors
GB GB (GB/T), German standard (DIN), British Standard (BS), Japanese standard (JB)
Editor of merits and faults
Welding, strength is relatively large, and the use of a wide range of thin and thick can be, but due to high temperature will lead to deformation of the joints, and can not be disassembled, and some active metals can not be welded in the usual way, such as aluminum, magnesium, etc., need to shield gas or argon arc welding, require processing technology and precision.
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Traction molecular pump is the gas molecules and high-speed rotation of the rotor collision to get the kinetic energy, was sent to the exit of a momentum transfer pump. It is characterized by a short start-up time, a high compression ratio in the molecular flow regime, and the ability to remove a wide range of gases and vapors, especially for pumping heavier gases. As the use of vacuum pumps becomes more and more widespread, understanding the relevant parameters is very important for the subsequent production work. Drag the molecular pump 1, the pumping rate (volume flow rate): When the pump is equipped with a standard test cover and the required conditions, the flow rate of gas flowing through the test cover and the pressure measured at the designated position on the test cover the ratio of pressure . Pump pumping speed. That is under a certain pressure and temperature, the vacuum pump in a unit of time from pumping the gas volume of the container. 2, the ultimate pressure (ultimate vacuum): pump equipped with a standard test cover and work according to the provisions of the conditions, without introducing normal gas work situation, the trend toward the lowest pressure. That is, the lowest steady pressure that can be reached after the suction side of the vacuum pump has been sufficiently evacuated. 3, starting pressure: no damage to the pump start and the role of pumping pressure 4, the former pressure: the exhaust pressure is lower than the pressure of an atmospheric pressure vacuum pump outlet pressure. 5, the maximum pressure of the previous stage: more than the pressure can make the pump damage. 6, the maximum working pressure: corresponding to the maximum suction of the inlet pressure. Under this pressure, the pump can work continuously without deterioration or damage. 7, exhaust volume: gas flow through the pump inlet. 8, compression ratio: pump for a given gas outlet pressure and inlet pressure ratio. In summary, we can know that pump pumping speed and the ultimate pressure of two parameters is the practical application of the most important parameters of the vacuum pump. However, the pulling molecular pump pumping speed is small, the reliability of the work is poor, easy to mechanical failure and other characteristics, leading to the exception of special needs, in fact rarely used traction molecular pump. Faced with this dilemma, it should attract the attention of relevant professionals, how to further improve the traction molecular pump market competitiveness, to strengthen the study of its parameters, continuous improvement of the relevant parameters is a worthwhile consideration, I believe traction molecular pump will be able to adapt to market demand . Related articles: Molecular vacuum pump parameters Roots vacuum pump parameters