Stud bolts, also known as double-ended screws and double-ended studs. A fixed link feature that is not necessary to connect machines. There are threads in the center of the stud bolts, and the screws at both ends are thick and thin. Generally used in mining machines, cars, bridges, boiler steel structures, pendant towers and large buildings.
Bolts generally refer to screws with relatively large diameters, and may also have no heads, such as stud bolts. Generally, it is not called "stud bolt", but called "stud stud". The most common method of double-ended studs is to have threads at both ends and polished rods at both ends. The non-essential uses of stud bolts are as follows:
1. It is used for the main body of large equipment and needs accessories of the equipment, such as: sight glass, mechanical seal seat, deceleration frame, etc. At this time, a stud bolt is used, one end is screwed into the main body, and the other end is equipped with a nut after the accessory is installed. Because the accessory needs to be disassembled frequently, the thread will wear out faster, and it is very convenient to use the stud bolt to replace.
2. When the thickness of the connecting body is large and the bolt length is very long, stud bolts will be used at this time.
3. It is used to connect thick plates and places where it is inconvenient to use hexagonal bolts, such as concrete roof trusses, roof beam suspension monorail beam suspension parts, etc.
Double-headed screws need to be prevented from loosening. In practice, external loads such as vibration, change, and high-temperature creep of materials will cause friction to decrease. The positive pressure in the thread pair disappears at a certain moment and the friction force is zero, and then the threaded connection is loosened. After repeated effects, the threaded connection will loosen and fail. Therefore, it is necessary to prevent loosening, otherwise it will affect the normal operation, and then constitute an accident.
Stud bolts have excellent economy, and the benefits of other welding methods lie in the welding power. For mass-produced workpieces, standard studs are low cost. There are various types of equipment and welding torches, and the purchase cost of the equipment must be low. Depending on the product, it can be made into a multi-station automatic welding machine, or a high-precision gantry-type CNC automatic welding machine. Stud welding has high quality reproducibility and low rejection rate. However, in the application of stud welding, attention should be paid to the same as other fusion welding, and the carbon content in the steel is bound to a certain extent. For structural steel studs, welding should be performed according to the recommended stud material and the weldability of the base metal combination, otherwise The stud and base metal will be infusible with each other. The combination of stud material and base metal other than the recommended design shall be tested to determine the weldability and the product design of the anchor bolt requires continuous relevant inspection to determine the feasibility.
Stud bolts save time and cost, the structure of all stud bolts does not require drilling, punching, threading, riveting, screwing and finishing and other processes, continuously expanding the application potential of structural design, high current and small penetration . Therefore, welding to very thin sheets is possible. The workpiece for stud welding must be welded from one side. Can be welded in all directions and can be tied to straight bulkheads with the help of extenders. Therefore, it is welded in a short time and there is little deformation after welding, so no trimming is required. Because the welded structure does not require drilling, it will not cause leakage. The joint can achieve high strength, that is, the joint strength of stud welding is greater than the strength of the stud itself.
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