Rail connection has welding, Fish Bolt, rail joint plate connection and so on. For rail welding technology requirement is high, after welding, we need to carry out a series of tests, such as ultrasonic flaw detection, rail flatness inspection, drop hammer and so on. Fish bolt connection only needs to clamp on the fish bolt to tighten at two rail joints. Its installation requirements are simple, and it has characteristics of simple, convenient installation, quick replacement and so on.
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Some customers use hex bolts for tightening directly, although the theory can be used, relatively speaking, fish bolt is special fasteners, Rail Joint Plate or splint is composed of circular and elliptic hole, two convex parts can be just stuck in the elliptical hole position, when fastening, there will not be a continuous rotation phenomenon.
Fish bolt is one of widely used rail fasteners in connecting the steel rails together, and it is usually with fish plate in railway, which is also the reason why it is called fish bolt. If it is used improperly, it&#;s easy to crack during the application in railway. Now we will introduce why it may crack and what we need to attention during the processing of installation and application.
1.Tightening torque is too large with uneven force when installing the fish bolt. Not choosing suitable torque wrench strictly matching the assembly, the workers may not familiar with the degree of tightening torque. They may think, the tighter the better, to the extent that it exceeds the yield limit of bolt material. So that fish bolt becomes to be out of shape. It is necessary to tighten the fish bolt according to the standard. The workers need to attention that suitable force may make the perfect effect, not the big strength, the better.
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2. The flaws of the raw material, processing defects and problems in heat treatment may also cause the fracture of fish bolt.
Fish bolt plays important role in ensuring the safety of rail track, therefore, it is necessary to choose high quality and good performance fish bolt. In addition, railway workers need to check and maintenance railway components regularly to ensure the safety of railway.
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