Basic knowledge about bolts?

Update: 09-11-2020

Stud bolts are manufactured in accordance with the GB89 […]

Stud bolts are manufactured in accordance with the GB897-GB901 standard. The materials used are: Q235, 45#, 40Cr, 35CrMoA, Q345D, the specifications are: M3mm-M100mm, and the length can be customized according to user needs. High-strength stud bolts with materials 35#, 45#, 35CrMoA, 25Cr2MoV, 304, 316, 304L, 316L, 2H, 2HM, B7, B7M, B16, B8, 8, B8M, 8M, widely used in electric power and chemical industry , Oil refining, valves, railways, bridges, steel structures, automobile and motorcycle accessories and other fields. Stud bolt function: generally used in mining machinery, bridges, automobiles, motorcycles, boiler steel structures, crane towers, large-span steel structures and large buildings, etc. . Stud bolt representation method: general stud bolt is expressed as: M12×100 GB 901-88 (standard) 35#/35# (material) 8.8 grade/8 (modulation grade) meaning: diameter = 12mm length = The 100mm GB 901-88 adopts the national standard (of course, industry standards can also be used as needed). Stud bolt standard: GB 900-1988 Stud bolt introduction Stud bolt saves time and cost. All stud bolt structures do not require drilling. The steps of punching, threading, riveting, screwing and finishing, continuously expand the application potential of structural design, high current and small penetration. Therefore, it can be welded to very thin plates. The work piece for stud welding must be welded from one side. It can be welded in all positions and can be restricted by means of an extender on a vertical partition. Because it is welded in a short time and there is little deformation after welding, no trimming is required. Because the welded structure does not require drilling, it will not cause leakage. The joint can reach very high strength, that is, the joint strength of stud welding is greater than the strength of the stud itself. How to install stud bolts is economical. The advantage of other welding methods lies in the welding power. For mass-produced workpieces, standard studs are low-cost. There are many types of equipment and welding guns, and the purchase cost of equipment is relatively low. According to the product, it can be made into a multi-station automatic welding machine or a high-precision gantry CNC automatic welding machine. Stud welding has a higher quality reproduction rate and a smaller rejection rate. However, in the application of stud welding, attention should be paid to other fusion welding, which has certain restrictions on the carbon content in steel. For structural steel studs, weld according to the weldability of the recommended stud material and base material combination, otherwise the stud There will be infusibility between the base metal and the base metal. The combination of stud materials and base materials outside the recommended range shall be tested to determine the weldability and the product design requirements of anchor bolts for relevant inspection and evaluation possibilities.