Although the quality of the high strength hex socket bolts is still relatively good, it can meet the basic strength requirements, but sometimes the fatigue strength is too large for us to imagine, and the high-strength hex bolts will also break. Here is a detailed analysis of the specific reasons: The high strength hex socket [...]
The Dacromet Hex Bolt refers to a hexagonal bolt that has been treated with the Dacromet process and is highly resistant to corrosion. The Dacromet process can resist the erosion of chloride ions, reform the defects of the traditional process of anti-corrosion, and put the anti-corrosion technology into a new stage. It can be said [...]
Galvanized hexagonal bolts refer to the treatment of ordinary hexagonal bolts after degreasing, pickling and fluxing, soaking in molten zinc to obtain a zinc coating. It is characterized by durability, high reliability and time saving. Labor saving and excellent resilience. However, the Galvanized Hexagonal Bolts also have disadvantage, it is difficult to screw the bolt [...]
The high strength bolt is the load that can be endured is larger than the ordinary bolt of the same specification. Common bolts are made of Q235 (A3). The material of high strength bolt is 35 # steel or other high quality material, which is heat treated after being made to improve the strength. The [...]
High strength structure bolts can be called high strength bolts. High strength bolts are mostly used to connect bridges, rails, high-pressure and ultra-high-pressure equipment. The fracture of these bolts is brittle fracture. High strength bolts are used in ultra-high pressure equipment. Bolts, in order to ensure the sealing of containers, need to apply larger prestressing [...]
The nuts are fastener having an internal thread and used in conjunction with a bolt, a mechanical part having an internal thread and used in conjunction with the screw to transmit motion or power. The nut is a part that is screwed together with a bolt or a screw for fastening. All the original parts [...]
At present, the development prospects of high strength fastener are good, but there are still some problems in domestic high-strength fasteners,following we will discuss about them. 1. Guarantee the load and the wedge load is unqualified. Guaranteed load and wedge load are the key items in the assessment of the mechanical properties of the product [...]
Classification of T-bolts The T-bolt is literally known as the shape of the bolt like an uppercase English letter "T", which is a good name. According to its use, it can be divided into the following types: 1. T-bolt for Hafen channel steel, the most commonly used is 45# steel, cast, quenched and tempered; also [...]
What can be used for fastener products? In fact, the standard parts are a type of mechanical parts that are used for fastening and are widely used. A wide variety of fasteners can be found on a variety of machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters and supplies. It is characterized [...]
Flange bolts consist of hexagonal head and flange disc (gasket under hexagonal and fixed hexagonal) and screw (cylindrical body with external threads). They need to be matched with nuts to fasten the parts connecting the two through holes. This connection form is called bolt connection. If the nut is screwed off from the bolt, the [...]
A490 Hex Structural Bolt is a form of threaded fastener with an external male thread. Bolts are thus closely related to, and often confused with, screws. A hex cap screw is a cap screw with a hexagonal head, designed to be driven by a wrench (spanner). An ASME B18.2.1 compliant cap screw has somewhat tighter [...]
Process Flow of High Strength Bolt: The process of nickel-phosphorus plating for high strength bolts consists of three parts: The first part is the pretreatment process, including pre-plating precision and appearance inspection of high strength bolts, manual degreasing, soaking degreasing, pickling, electroactivation and flash nickel plating. The second part is the process of electroless nickel [...]
High strength fasteners are conditioned according to technical requirements. Heat treatment quenching and tempering is to improve the comprehensive mechanical properties of fasteners to meet the required tensile strength and yield strength ratio of products. Heat treatment process has a vital impact on the internal quality of high-strength fasteners, especially its internal quality. Therefore, in [...]
Bolt threads are usually processed by cold, so that the thread blanks in a certain diameter range can be formed by rubbing (rolling) the screw plate (die), and by the pressure of the screw plate (rolling die). The plastic streamline of the threaded part can be obtained without cutting off, the strength is increased, the [...]
When inner hexagonal cylindrical head bolts are manufactured by cold heading process, the original structure of steel will directly affect the forming ability of cold heading process. The plastic deformation of local area in cold heading process can reach 60%-80%. Therefore, steel must have good plasticity. When the chemical composition of steel is constant, metallographic [...]
Fastener Technology: Hot rolled- spheroidizing annealing- mechanical descaling- Pickling- cold drawing- cold forging- thread processing- heat treatment- Inspection. In the fabrication of fasteners, it is important to select the correct fastener materials, because the performance of fasteners is closely related to their materials. If the material selection is improper or incorrect, it may cause the [...]
Bolt Quality: Nowadays, advanced manufacturing represented by large aircraft, large power generation equipment, automobiles, high-speed trains, large ships and large complete sets of equipment will enter an important development direction. As a result, fasteners will enter an important stage of development. High strength bolts are used for connection of important machinery. Repeated disassembly or various [...]
High-strength bolts nuts connection has many advantages, such as simple construction, good mechanical performance, removable, fatigue resistance, and no loosening under dynamic load. It is a promising connection method. High strength bolt is a special wrench to tighten the nut, so that the bolt produces a huge and controlled pre-tension, through the nut and cushion [...]
U-bolts for Heavy Trucks: U-bolts is used to fasten leaf springs, which are customarily called horse-riding bolts in the industry. A pair of balanced suspension leaf springs are distributed on both sides of the axis of the balanced suspension by two riding bolts. The leaf springs are fastened to the leaf spring seat of the [...]