Freeze joint fishplate

The material of the splint is usually 55# steel, the thickness is 55mm, the cross section is in the form of variable section, the middle is thick, and the two sides are thin, which is more in line with the stress condition of the joint. The two outer incline surfaces of the splint are formed by CNC machining center milling and are closely fitted to the two inclines of the upper and lower jaw of the rail waist

I. Overview of Fishplates

Fishplates (rail joint plates), commonly known as rail clamps, serve to connect rail joints. They are categorized into light rail, heavy rail, and extra-heavy rail types. Fishplates function as connecting fasteners between rails, offering simpler and more labor-saving installation compared to rail butt welding techniques. They are designed for use with fishplate bolts. The fishplate features a central bolt hole. Above and below the horizontal axis of this hole, it has an upper working surface that contacts the lower portion of the rail head and a lower working surface that contacts the upper portion of the rail base. The rear section of the upper working surface extends upward to form a transition segment elevated above the rail surface. This transition segment creates a bridge arch shape along the fishplate's length, with a higher central section and lower ends. This bridge-shaped fishplate design simplifies construction while reducing wheel impact on rail joints. It enhances longitudinal deformation continuity at the joint, improving ride smoothness during train passage.

II. Types of Fishplates

1. Light rail fishplates, also known as rail clamps, and heavy rail fishplates, also known as crane rail miter joint clamps. Insulated fishplates are entirely made of insulating materials. Insulated fishplates are a new type of track material manufactured from high-strength composite materials. They resist corrosion, rust, and UV radiation while being non-conductive and non-magnetic. As thermosetting materials, they cannot be reprocessed, making them theft-resistant.

2. Fishplates are categorized by rail weight: 8kg, 12kg, 15kg, 18kg, 22kg, 24kg, 30kg, 38kg, 43kg, 50kg, 60kg, 75kg. Insulated light rail fishplates include 8kg, 9kg, 12kg, 15kg, 18kg, 22kg, 24kg, and 30kg. Insulated light rail fishplates are also known as rail clamps. Insulated heavy rail fishplates include 38kg and 43kg120, also known as crane rail miter joint clamps.

3. Standard cast iron fishplates come in two types: four-hole and six-hole. Insulated fishplates internationally include BS47 and UIC series, e.g., BS80A, BS75R, UIC60, UIC54. These are further categorized into four specific types.

4. Fishplates are classified by material: ductile iron, Q235 rolled steel, forged steel, etc. Fishplates primarily utilize medium-carbon steel and high-carbon steel as raw materials. Our company's main fishplate models include 115RE, 132RE, UIC60, UIC54, BS80A, BS90A, BS100A, and 90/91LB. Additionally, we produce machined composite fishplates as well as cast iron or cast steel fishplates.

III. Specific Dimensions of Commonly Used Joint Plate Models

Note: The dimensions above are for reference only. Actual dimensions may vary depending on the manufacturer, production process, and specific standards. For precise dimensions of specific joint plates, consult relevant standards or technical documentation provided by the manufacturer.

IV. Material Quality Requirements for Fishplates

1. Joint Plate Material:

1) Joint plates are typically manufactured from high-strength steel to meet strength and durability requirements during use.

2) Specific materials may include alloy steel, stainless steel, etc., with selection determined by the application environment and requirements.

2. Quality Requirements:

1) Joint plates should be manufactured using advanced processes such as precision cold bending, CNC cutting, and precision welding to ensure dimensional accuracy and flatness.

2) The surface quality of joint plates must be excellent, with no defects such as cracks, folds, bubbles, inclusions, or scale.

3. Mechanical Properties of Joint Clamping Plates:

Must comply with relevant standards, including tensile strength, yield strength, hardness, and other specified indicators.

V. Application Scope of Various Joint Plate Models

1. Conventional Railways:

1) Joint plates rated at 43, 50, 60, and 75 kg/m are widely used for connecting and securing conventional railway tracks.

2) These joint plates ensure train stability and safety during operation.

2. High-Speed Railways:

1) Joint plates for high-speed railways face stricter requirements.

2) Heavy-duty joint plates like 60 and 75kg/m are preferred for their high strength and durability.

3. Urban Rail Transit:

1) Subways, light rail systems, and similar urban rail networks also utilize these joint plates for track connection and fixation.

2) Appropriate joint plate models and specifications are selected based on specific operational environments and requirements.

4. Specialized Railways:

1) Industrial railways, forestry railways, and similar specialized lines may encounter unique operational environments and demands.

2) Customized joint plates are selected according to specific conditions to meet these specialized requirements.

Switch Fishplate

The critical role of commonly used 43, 50, 60, and 75kg/m fishplates in the railway system is undeniable. Their dimensions, material quality requirements, and application scope are determined based on specific usage needs to ensure the safety and stability of the railway system. In practical applications, relevant standards and regulations must be strictly adhered to when selecting appropriate fishplate models and specifications. For specific on-site issues and product requirements, please visit us for consultation.