How to Deal with  Fishplate Crack

Fishtail plywood is commonly known as road plywood, also called fishtail plate, which plays a connecting role at the track joint. Divided into light rail, heavy rail and lifting rail. Fish plate is a connecting fastener used to connect rails.

With the continuous development of railway to heavy load and high speed, the performance of rail as the main bearing part of railway has been paid more and more attention. Through strengthening means such as quenching heat treatment or alloying of rail head, the strength of rail has reached the level of 1000MPa, and it is further improved. However, as a rail connection, the fishplate has not been fully understood, although the development of niobium-containing low-alloyed fishplate broke the situation that BT ordinary carbon steel materials have dominated the world since the 1950s, only a medium-sized plant of Angang Steel produces such fishplates, and the performance improvement is very weak compared with the rail, and the improvement of fishplate performance is not matched with the improvement of rail performance.

In fact, the rail is connected through the fishplate and other connecting parts to maintain the joint range and rail bearing the same bending moment and lateral force, the working status and safety performance of the fishplate also directly affect the operating status and safety of the line, the site due to the fishplate failure caused by major accidents occur.

How to reduce the fishplate crack

1. Reduce friction coefficient

First of all, the cracking of the fishplate can be reduced by reducing the friction coefficient, which can be achieved through various channels, such as surface treatment, to improve the quality of the surface, or to add some form of intermediary on the material contact surface.

2. Reduce slip amplitude

Secondly, the fishplate crack can be reduced by reducing the slip amplitude, that is, the amplitude of the relative action between the rail and the fishplate can be reduced. The slip amplitude can be reduced by adjusting the fastening force between the rail and the fishplate, and the slip amplitude can be reduced by improving the condition of the joint to reduce the impact.

3. Reduce contact pressure

The fishplate crack can also be reduced by reducing the contact pressure. There are many factors affecting the contact pressure. Reducing the contact pressure will reduce the strength of the interaction between the rail and the fishplate.

As a fastener used for the connection between the rail and the rail, the use of the fishplate is less labor than the rail butt welding, the installation is simple and quick, and the fishplate is used with the fishtail bolt. A fishtail bolt hole is arranged in the middle of the fishtail plate, and a contact surface in contact with the rail is arranged on both sides along the horizontal axis of the fishtail bolt hole. The contact surface in contact with the top of the rail extends upward to form a transition section higher than the rail side. The transition section forms a bridge arch with the middle high and both ends low along the length direction of the fishtail plate. The arch fishtail structure of the bridge can reduce the impact of the wheel on the rail joint, increase the longitudinal continuity of the rail joint, and improve the smoothness of the train when passing.

In order to ensure the good use of railway accessories such as fishplate, it is necessary to regularly overhaul and reinforce the fishplate to improve the quality of equipment and avoid accidents.

Glory Rail is a quality Rail Joint supplier from China. we could supply all kinds of railway fish plat for light rail, heavy rail and crane rail.

Glory Rail regular supply models

UIC54

JIS50N

BS80A

DIN standard

AREMA STANDARD

We can also customize according to your needs, if you have any needs just contact us!