railfastening

  As a   Rail Spike Manufacturer , let's share with you information about high-strength bolts. High-strength bolts are high-strength bolts and belong to a standard part. High-strength bolts are mainly used in steel structure engineering to connect the connection points of steel structural steel sheets. High-strength bolts are divided into torsional shear high-strength bolts and large hexagonal high-strength bolts. Large hexagonal high-strength bolts are high-strength grades of ordinary screws, while torsion-shear high-strength bolts are improved of large hexagonal high-strength bolts for better construction. The construction of high-strength bolts must be tightened immediately after initial tightening. The impact-type electric wrench or torque-adjustable electric wrench is required for the initial tightening of high-strength bolts. The final tight high-strength bolts have strict requirements, and the final tight-twisting high-strength bolts must be used. Torsional shear type e...

  As a   Railway Fastening System Manufacturer , let's share with you what types of fasteners are available. 1. Detergent The decontamination cleaning agent mainly contains a solvent, a surfactant, and water. Unlike emulsified cleaning agents, it is a pure solution, not an emulsion. It is mainly used for maintenance cleaning of equipment and fastener packaging. 2. Synthetic cleaning agent The synthetic cleaning agent is also an alkaline cleaning agent, which differs from the standard alkaline cleaning agent in chemical composition, the standard alkaline cleaning agent is substantially inorganic, and the synthetic agent is an organic agent containing an amine-based substance. Standard alkaline cleaners are used to remove alkaline residues from single-stage cleaning and are also good rust inhibitors. Synthetic cleaners are used for moderately difficult cleaning, such as quenching oil or quenching polymer solutions on the surface of fasteners. 3. Alkaline cleaning agent The alkal...

  As an   Anchor Bolt China Exporter , we continue to discuss common treatments for anchor bolts. 3. The height of the anchor bolt is unqualified (1) When the bolt is low and the difference is less than 15mm, the bolt can be burned red with an oxyacetylene flame and then elongated. The lengthening method is: erecting a square steel plate with holes in the middle of the two stacked pads and fitting them on the anchor bolts, and tightening with a non-standard nut and torque on the two sides, thereby pulling the red portion of the bolts and pulling the bolts When the difference is more than 15mm, a deep pit can be dug around it, the bolt is cut at about 100mm from the bottom of the pit, and a new non-standard bolt made of the same diameter is welded and reinforced with two iron rods. The length of the iron bar is about 4 to 5 times the diameter of the bolt. (2) When the anchor bolt is too high, the upper part can be divided to re-thread. Our company also offers  Bridge Bolt ...

  As a   Rail Fishplate Manufacturer , let's share with you several common treatments for anchor bolts. 1. The loosening of the anchor bolts in the foundation. When the bolt is loose, the bolt should be knocked back to the original position, and the basic hole should be shovel into a large shape with a small size at both ends. Then, the two round steels are welded on the bolt, and the pit is rinsed and grouted with water, and solidified. Then tighten the bolts. 2. Treatment of center deviation. When the anchor Bolt has a diameter of less than 30 mm and the center deviation is within (10~30) mm, the bolt is burned red with an oxyacetylene flame, and the steel plate is bent with a sledge hammer to prevent the bolt from being tightened when the bolt is tightened. When the bolt diameter is larger than 30mm and the deviation is large, the bolt can be cut and welded with a steel plate in the middle of the bolt. If the strength of the  Anchor Bolt  is not enough, two steel ...

  As a   Rail Spike Manufacturer , let's talk about Hex Bolt's maintenance methods. 1. When running 12000km for secondary maintenance, the engine oil sump should be assembled to check the engine bushing usage. If the individual bushing clearance is too large, it should be replaced, and the connecting rod bolt should also be replaced. If you find that the engine is running unevenly and there is abnormal noise during normal operation, you should stop it for inspection. 2. High-strength Hex Bolt should check the newly replaced connecting rod bolts during each maintenance. Pay attention to the head of the high-strength Hex Bolt, the guiding part, whether there are cracks or dents in the thread parts, and whether the tooth shape and pitch of the thread are abnormal. There are abnormal situations that should be resolutely avoided. 3. When assembling the connecting rod cover, apply a torque wrench and tighten according to the specified specifications to prevent the torque from being ...

  As a   Railway Tie Plate Supplier , we have the following recommendations for bolt fastening methods. 1. Before connecting the bolts, make sure that the parameters such as the pitch, shape and direction of the bolts are in accordance with the parameters; 2. Thoroughly clean the sludge, carbon deposit, coolant or oil in the bolt hole before tightening, check whether the thread is intact, and whether the bolt is elongated; 3. When tightening the bolt, it should be tightened according to the torque specified in the instruction manual. If there is no regulation, the tightening torque is reasonably determined according to the diameter of the bolt; 4. When disassembling the cylinder head bolts, it must be carried out after the engine is completely cooled. When disassembling, follow the principle of “smoothly loosening from the two sides to the middle diagonal direction” to prevent the cylinder head from warping and deforming; 5. When the same part is fastened with multiple bolts, ...