Do you know the selection method of bolt connection and hole diameter? Let's learn more about it below. 1. The basic method of bolt connection (1) The method of stud bolt connection is divided into two types: spring washer tightening method with nuts and washers and through-hole thread tightening method, which are used to tighten not too thick product workpieces. (2) Stud bolt connection A stud bolt is a node-shaped connector with external threads on both sides. One end is screwed into the screw hole of the connected part, and the other end passes through the holes of other connected parts. The connected parts can be connected into one body by tightening the nut. It is mainly used in places where it is often disassembled, the structure is relatively tight, or the product workpiece is thick, and it is not suitable for connection with stud bolts. (3) Screw connection does not use nuts. Instead, the screw is directly screwed into the hole of the connected part, and the thread is automatically screwed out of the hole to achieve the purpose of connection. This method is suitable for connections with low bearing capacity or some small parts. (4) The length of the screw connection has threads, which are used to screw into the thread hole of one part and use the end of the extruder screw to touch the surface of the other part to fix the relative position of the two parts. In addition, there are also foundation bolts, hook bolts, and hemlock ring connections. 2. Selection of Bolt Aperture Bolt custom-made manufacturers emphasize: in the thread connection, the common one is the bolt connection, and in the calculation of the strength of the bolt, it is generally selected according to the bearing force characteristics and force transmission size of the bolt in the connection Bolt hole diameter, in order to determine whether the connection meets the strength requirements. In the bolt connection, most of the bolts bear the function of tensile force, and such things are divided into loose connection and tight connection. The so-called loose connection means that the bolt has no pre-tightening force, and the connection only works when it bears the working load. Loose connections are generally less used, and tight connections will have a large pre-tightening force before bearing the operating load. Most of the bolted connections in steel structure engineering are tight connections. In the bolt connection, the most common damage method is that part of the screw rod of the extruder is torn off. Since the bolts have been standardized, the structural specifications and nut sizes of each part have been determined based on equal strength standards and work experience. Therefore, when using bolts, first determine the bolt hole diameter, and then select according to the specificationsNuts and seals. If the bolt is strong enough, the nut is also strong enough.