Bolt, Stud, nut Installation Standardization
Xintai Ruiyu Mining Materials Processing Co., Ltd. is mainly engaged in the production of anchor rods, mining nuts, anchor discs, high-strength anchors, etc. Below we come to know about the design and installation standardization of bolts, studs, nuts, and other related design and installation, in the modern industries, especially in the machinery, construction and other industries, there is almost no product to avoid the bolt and nut fasteners.
With the rapid development of modern industry, people continue to summarize the design and production experience, and gradually developed a series of bolts and nuts of the relevant standard system, which includes the mechanical properties of commonly used bolts and nuts, specifications and dimensions, the design of the bolt hole dimensions and tightening methods and other standards, to the design, processing and installation work has brought great convenience. However, due to these standards system is more cumbersome, and the standard is relatively decentralized and other reasons, to the design and installation work to bring relative inconvenience. This paper mainly focuses on the design and installation of bolts and nuts to summarize the relevant design and installation of bolts and nuts to make the design and installation of bolts and nuts more standardized, and ultimately ensure the quality of the product.
The design of the bolt and nut
Thread selection of the bolt and nut threads are generally selected for the tooth angle of 60 °, high root strength, with a good self-locking function of the thread.
The threads are based on the national standard GB/T192-2003 “Basic Threads for Common Threads”. This connection thread according to the different pitch, and is divided into coarse thread and fine thread. The small diameter of fine thread is larger than that of coarse thread, so the bolt with fine thread has high strength and good self-locking performance. However, fine thread is not wear-resistant, low shear strength, easy to slip buckle. General design commonly used coarse thread; for thin-walled parts, vibration and shock and dynamic loads, precision need to fine-tune the institution of the occasion, the general choice of fine thread; in high-temperature parts and the use of hydraulic tensioner for installation.
