High-strength force characteristics and performance requirements

Bolts play a role in connection, fastening, positioning, sealing, etc. in various mechanisms. In addition to the simple positioning of the bolts, the bolts need to be pre-tightened during installation and are therefore subjected to tensile loads. The greater the preload, the higher the joint strength and the tightness and tightness. Usually the correct design is to overcome the relative displacement of the connected parts with a sufficiently high pre-tightening force to avoid the bending and shearing loads of the bolts. Some bolts, such as connecting rod bolts, cylinder head bolts, etc., in addition to the axial preloading tensile load, are usually subjected to additional axial tensile (alternating) loads and transverse shearing during operation ( The effect of the alternating load or the resulting bending load is sometimes affected by the impact load. Under normal circumstances, the additional lateral alternating load will cause the bolt to loosen, the axial alternating load will cause the fatigue fracture of the bolt, and the axial tensile load under the action of the environmental medium will cause the delayed fracture of the bolt. In this regard, when applying high-strength bolts, higher technical requirements are imposed on material composition, metallurgical quality, bolt structure, manufacturing process, installation and use.

In general, high-strength bolts and their steels generally meet the following requirements:

1. High tensile strength to resist elongation, breakage, slippery buckle and wear.

2. Higher plasticity and toughness to reduce sensitivity to skew, notched stress concentration and surface quality.

3. For bolts working in humid atmospheres or corrosive atmospheres such as seaside, riverside, oil fields, etc., bolt materials are required to have sufficiently low delayed fracture sensitivity to ensure safe and reliable bolt operation.

4. For bolts subjected to alternating load and impact load, it is required to have high fatigue resistance and multiple impact tensile force to resist fatigue and multi-punch fracture.

5. For bolts working in cold regions or at low temperatures, low tough-brittle transition temperatures are also required.

6, medium and small diameter bolts often use cold heading bolt head and 搓 (rolling) wire production process, which requires the material has a good cold heading and other cold processing technology.

Diaphragm For Goyen Pulse Valve

The category of diaphragm for Goyen pulse valve. The diaphragms are listed as follows:

Goyen Pulse Valve Diaphragm, Goyen Diaphragm, Goyen Diaphragm Kit, Goyen Pulse Valve Membrane

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