Fastener Solutions for New Energy Vehicle Manufacturing and Rail Transit Systems

Fastener Solutions for New Energy Vehicle Manufacturing and Rail Transit Systems

As the scope of global human cities is getting broader, which brings about the increasing demand for transportation operations, the scope of international human development of urban transportation is also getting farther and farther. The metropolitan transportation system can be divided into railed and trackless systems. Rail transportation usually refers to vehicles running on a specific track of a class of transportation system or car. It is a variety of modes of transportation such as high-speed rail, train, subway, light rail, tram, and magnetic levitation trains. Trackless transportation systems mainly refer to electric buses and new energy buses.

What is meant by railroad vehicle fasteners?

Railroad vehicle fasteners are specialized fasteners used to fix and connect various components of railroad vehicles. These fasteners are of multiple types and can be categorized into bolts, nuts, rivets, pins, etc., according to different application scenarios and needs. Their primary role is to ensure the stable connection of the various train components and improve operational safety and comfort.

In addition to welding and riveting, the structural parts of rail transit vehicles are mainly connected by threaded connections, which satisfy the necessary functions for vehicle operation and ensure the interchangeability of essential parts of the vehicle body structure. Due to the specificity of the structure, the transmission, brake cylinder, water tank, and other heavy equipment on the vehicle are mounted on the vehicle chassis using high-strength bolts. Such as the domestic, eight sets of high-speed train bogies are used at 8.8 level and above the high-strength bolts, specifications M16, M20, M24, and M36, etc., the number of the whole column reaches about 650.

New energy vehicles and rail transit vehicles manufacturing fasteners characteristics of the solution

High strength and reliability： Railcar fasteners must withstand huge operational loads and impact forces, so they must have high strength and reliability to ensure the train remains stable in long-term operation.

Wear and corrosion resistance: railcar fasteners need to work in various complex environments, so they need good wear and corrosion resistance to extend the service life.

Safety: Railcar fasteners must comply with relevant safety standards to protect passenger safety and ensure they will not fall off or break in an emergency.

Easy to maintain: Railcar fasteners should be easy to install and dismantle for daily maintenance and overhaul.

New energy automotive and rail transit vehicle fasteners in the manufacturing of the importance of solutions

New energy manufacturing and rail transit vehicle fasteners are vital in train operation. They connect and fix the various parts of the train, which are directly related to its safety and stability. Once the fasteners have problems, it may lead to severe consequences such as train derailment, damage, or casualties. Therefore, choosing high-quality railcar fasteners and checking and maintaining them regularly is essential.

Ensure train safety: Railcar fasteners connect and fix various components of railcars and play a vital role in their safety and stability. Once the fasteners are faulty, they may lead to severe consequences such as train derailment, damage, or casualties.

Improved operational efficiency: The high strength and reliability of rail vehicle fasteners can improve the operational efficiency of trains. For example, fasteners such as bolts and nuts can quickly and securely fasten various components of the train, reducing vibration and noise during operation, thus improving the comfort and operational efficiency of the train.

Enhance the durability of railroad vehicle trains: railroad vehicle fasteners have good abrasion and corrosion resistance, which can extend the service life of trains. For example, some fasteners made of unique materials, such as corrosion resistance, high-temperature resistance, etc., can work in harsh environments to ensure the stable operation of the train in various environments.

How do you choose the correct fasteners for new energy and rail vehicles?

In choosing the correct fasteners needed in new energy vehicles and rail transit vehicles, you should choose the right type according to the application scenario and vehicle requirements: according to the actual needs, choose the rail vehicle fasteners suitable for specific parts and environments. For example, anti-loosening nuts or vibration-resistant rivets should be used in high-vibration parts.

1. Consider load and safety: According to the load and safety requirements, it is recommended to choose the brand of railcar fasteners that have undergone strict quality testing and certification to ensure their performance and reliability.

2. Focus on abrasion and corrosion resistance: When choosing railcar fasteners, their abrasion and corrosion resistance should be considered to ensure long-term stable operation.

3. Consider the ease of maintenance: choose the railcar fasteners that are easy to install and dismantle for daily maintenance and overhaul. At the same time, we should pay attention to the choice of railcar fasteners, which should be compatible with other parts of the train so there will be no adverse effects. For example, the fastener material should be matched with the material of the connecting parts to avoid connection failure or damage due to material incompatibility.

4. A large number of used rivet nuts, structural rivets, and other fasteners

Rivet nuts can be divided into flat heads, small heads, and countersunk heads according to the head type; according to the structure, they can be divided into through-hole and blind holes, and riveted to the plate, can be divided into hexagonal and cylindrical. Material can be aluminum, steel, stainless steel, and other options, such as an applicable rivet plate thickness range, reliable quality, easy to install, and strong bearing capacity.

In some parts of the need to carry the force, you can choose structural rivets relative to ordinary rivets, which have a higher strength, anti-loosening ability, and higher safety performance. The products are mainly internal locking wire rivets, external locking wire rivets, seahorse nails, single drum rivets, multi-drum rivets, etc.

In some aluminum panels that need to provide the strength of their threaded connections, there will be a large number of steel wire screw sets or self-tapping steel screw sets.

5. Reduce maintenance costs: Railcar fasteners are easy to install and disassemble for routine maintenance and overhaul. Regular inspection and maintenance can identify and solve potential problems in time, reducing maintenance costs and downtime and improving train utilization rates.

High-strength bolts for critical parts of new energy vehicles and rail transit

1. Grade of raw materials: the raw materials of fasteners are alloy steel or boron-containing steel, and their chemical composition should be by the relevant national standards; Grade 10.9 and above bolts, screws, and studs should be alloy steel and contain at least two of the following elements: Cr, Ni, Mo, V, and the total content of alloying elements ≥ 1 %. Recommended but not limited to using raw materials specified in the following table.

2. Manufacturing requirements: bolts, screws, head should be upsetting shape. Bolts, screws, and studs, after quenching, the heart of the metallurgical organization of at least 90% of the martensite, do not allow the emergence of pearlite or block ferrite and reticulated ferrite. Bolts, screws, and studs are not allowed to have metallurgical can be measured on the surface of the white phosphide aggregation layer; the removal of the phosphide aggregation layer should be carried out before heat treatment. Bolts, screws, and stud threads in ** final heat treatment, a roll-forming; heat treatment process of bolts (screws, studs) formed in the support surface, the rod body, the rod body transition arc, the oxide skin at the diameter of the thread blanks need to be removed before thread rolling.

3. Mechanical performance requirements: bolts, screws, and studs quenched and tempered mechanical properties should be in line with GB/T 3098.1-2010 8.8 grade, 10.9 grade, and 12.9 grade bolt requirements.

New energy vehicle manufacturing and rail transit vehicle fasteners surface treatment:

1. Surface treatment methods can be selected, such as oxidation, zinc plating, and zinc-chromium coating (Dacromet). Electro-galvanized according to ISO or DIN standards.

2. For anti-corrosion requirements of neutral salt spray test of not less than 720 hours of surface treatment, zinc-nickel alloy surface treatment should be preferred; for electroplated zinc-nickel alloy surface treatment of high-strength bolts must be dehydrogenated for 4-6 hours;

3. For anti-corrosion requirements of neutral salt spray test of not less than 350 hours of 12.9-grade bolts, screws, and studs, should be selected zinc-chromium coating (environmental protection Dacromet) treatment or phosphating surface treatment;

4. Surface friction coefficient: the friction coefficient of the supporting surface of the bolt head is 0.10 ≤ μK ≤ 0.16; thread friction coefficient: 0.10 ≤ μG ≤ 0.16.

Fasteners are widely used mechanical parts and components, called the rice of industry; fasteners are small, but their importance is self-evident.

The rapid development of global rail transit vehicles and new energy vehicle manufacturing can not be separated from high-quality fasteners; high-quality fasteners are safer, more reliable, stable, and more comfortable. New energy vehicle manufacturing and rail transit vehicles provide a strong guarantee.

Fasteners are essential for new energy vehicles and rail transit vehicles and are self-evident as a critical component to ensure the safe and stable operation of trains. Understanding different types of railcar fasteners and their characteristics and making reasonable choices according to actual needs is of great significance for improving the safety and stability of trains. At the same time, regular inspection and maintenance of railcar fasteners are also essential measures to ensure the safe operation of trains.

The connection design of new energy and railroad vehicle manufacturing systems mainly adopts the riveting program, using many rivets. The world can have high-speed rail, subway, train, and other rail transportation systems manufacturing countries only a few, which makes these rail products support riveting products.

The main tools of the trackless urban transportation system are new energy buses and new energy buses due to environmental protection and energy needs, so the structure of lightweight new energy vehicle manufacturers and rail transit vehicle manufacturers has put forward higher requirements. Today's new lightweight energy models will use many carbon fiber, aluminum, and magnesium alloy materials. Due to the use of an aluminum body, we can no longer use the traditional welding process and must use the riveting process. Standard rivets can not meet the requirements; Juxin Fasteners successfully developed a new energy bus body frame and chassis rivets.

The rivets used in new energy buses and rail transit systems are not ordinary in the traditional sense. They require high strength, high tensile strength, shear resistance, and locking force. As a prominent manufacturer and supplier of rivets for new energy buses and rail transit system riveting solutions, we will lead the entire riveting industry to the next level.

JIS Medium-Strength Steel Hex Head Screws： Made to Japanese Industrial Standards, these Class 8.8 steel screws are suitable for fastening most machinery and equipment. The zinc yellow-chromate plating resists corrosion in wet environments. Length is measured from under the head.

Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don't know the pitch. Fine threads are closely spaced to prevent loosening from vibration.

Please get in touch with me if you want high-quality, JIS Medium-Strength Steel Hex Head Screws fasteners or technical support for structural design. Thanks.Email:adelajonly@gmail.com

Website: https://www.juxinfasteners.com