railfastening

  Under normal circumstances, the screw only bears axial tension, not radial shear stress. When the nut is loosened, the force of the screw changes from tensile force to shear stress. When the sudden increase in load exceeds its rated load, the screw will be sheared and broken. Screw fracture is a very dangerous matter. According to the knowledge of fastener screws,   Rail Fishplate Manufacturer   shares the reasons for loosening and fracture of screws, and effective preventive measures in addition to the quality of screws and nuts and the reasons for processing and processing. High Strength Bolt Causes of loose and broken screws: (1) The installation is not tightened according to the technical requirements, or the tightness of each nut has a large gap. Once the individual nut is loose and does not bear the load, the load of the other nuts is greatly increased. (2) In tire maintenance and installation operations, many units use ordinary wind guns for disassembly and assem...

  As a   Spike and Rail Supplier , share with you. Dog spikes and screw spikes are the two most common railroad spikes on the market. Dog Spikes Geared up with a countered head, a railroad spike is a big nail utilized to protect as well as secure rails in a railway system. The rail spike was created by Robert Livingston Stevens, and also was first utilized in 1832. The primary feature of the railroad spike is to ensure a proper scale setting. Usual sizes are normally in between 9-10/ 16in and also 5.5-6in long. With a flat-edged point, the chisel-shaped spike is more immune to loosening up. Throughout railway transport, the spike does not require to offer a solid upright force, which allows the railway track a lot more freedom of motion. Initially presented in France in 1860, the screw spike soon ended up being the most usual railway material in continental Europe. Also called the rail screw, it is a large screw made use of to fasten any type of two railway tracks. It is addit...

  As a   Railway Fastening System Supplier , share with you. Fastener assembly space requirements Fastener assembly is driven by a special sleeve or gun head to achieve the designed torque value. In the process of fastener product design, it is necessary to take into account that a certain distance should be left from the surrounding parts during the assembly process, and it should not interfere with other parts of the parts, and it is easy to operate by the assembly workers on the production site. Railway Fastening System Fastener assembly boundary design requirements When designing fasteners, the tool installation space should be considered, and the following situations should not occur: 1. The location of the fastening point is in a confined space and cannot be seen by the operator. In this case, it is difficult to locate tools and fasteners, and it is not easy to remove the fasteners after they are dropped. 2. There are other parts covering the top of the fastening point (...

  In order to reduce the dispersion error of the bolt torque coefficient and improve the corrosion resistance, the fasteners are usually surface treated. However, different surface treatments have a great impact on the friction coefficient of threaded fasteners, and ultimately affect the specific tightening of the bolts. The following   Tram Fastening Manufacturer   leads everyone to analyze the effect of surface treatment on bolt tightening characteristics. Hex Bolt Theoretical analysis of the influence of friction coefficient on bolt torque coefficient: 1. Tightening torque of bolt connection 1.1 Friction in the triangular bolt spiral pair The friction of the moving pair can be divided into plane friction, inclined surface friction and groove surface friction according to the shape of the contact surface. In order to simplify the calculation of the friction force of the moving pair, regardless of the geometric shape of the two moving pair elements of the moving pair, th...

  As a   Tension Clamp China Supplier , share with you. We often see in mechanical equipment that some bolt connections use washers, some bolt connections do not use washers, some bolt connections use flat washers, some use spring washers, and some use spring washers. Add flat washers. Rail Anchor Bolt Should we use washers when designing? It's so entangled, have you ever entangled like this. Flat Washers When the bolts need to be removed frequently, in order to protect the surface of the connected part from being scratched, it is generally necessary to place a flat washer at the position of the nut or bolt head, so as to prevent the surface of the connected part from being scratched, especially for the use of precision Machined surface. In some joints where the friction coefficient is required to be more precise, there is no separate test requirement for the friction coefficient. For example, in the wind power bolt connection, bolts, nuts, and washers are generally purchased....