• 2310-2020
    What is a screw

    What is a screw

    Screw is a combination of simple machines—it is, in essence, an inclined plane wrapped around a central shaft, but the inclined plane (thread) also comes to a sharp edge around the outside, which acts a wedge as it pushes into the fastened material, and the shaft and helix also form a wedge in the form of the point. Some screw threads are designed to mate with a complementary thread, known as a female thread (internal thread), often in the form of a nut, or object that has the internal thread formed into it. Other screw threads are designed to cut a helical groove in a softer material as the screw is inserted. The most common uses of screws are to hold objects together and to position objects.

  • 1210-2020
    Fastener surface treatment process

    Fastener surface treatment process

    For the surface treatment of fasteners, people generally pay attention to aesthetics and anti-corrosion, but the main function of fasteners is to fasten parts, and surface treatment also has a great influence on the fastening performance of fasteners, so choose the surface When handling, the factor of fastening performance should also be considered, that is, the consistency of installation torque-pre-tightening force.

  • 2108-2020
    The development status of titanium alloy for aviation fastener is introduced

    The development status of titanium alloy for aviation fastener is introduced

    Titanium alloy fasteners are widely used in aerospace because of their low density, high specific strength and corrosion resistance. The development status of titanium alloy materials for aviation fasteners is reviewed. Combined with the development of titanium alloy for fasteners, the application status of titanium alloy for fasteners at home and abroad is introduced, and the performance characteristics of titanium alloy materials for fasteners are compared and analyzed. At the same time, combined with the requirements of advanced aircraft for high-performance fasteners, several high-strength and toughness titanium alloy materials for fasteners and their fastener processing technology are introduced.

  • 0108-2020
    Concept of high temperature and high pressure fastener

    Concept of high temperature and high pressure fastener

    Brief introduction of several common standards for high temperature and high pressure fasteners

  • 2907-2020
    Analysis of bolt fracture causes

    Analysis of bolt fracture causes

    Generally, we analyze bolt fracture from the following four aspects: First, the quality of bolts Second, the pre tightening torque of bolts Third, the strength of the bolt Fourth, the fatigue strength of bolts

  • 0605-2020
    Specification of fastener basic knowledge

    Specification of fastener basic knowledge

    Fastener is a kind of mechanical part which is widely used for fastening connection. It is widely used in various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemicals, instruments and supplies. It is the most widely used mechanical foundation. It is characterized by a wide variety of specifications, different performance uses, and standardization, seriation, generalization of the degree is also very high. Therefore, some people also call a kind of fastener with existing national standards as standard fastener, or referred to as standard fastener for short.

  • 1004-2020
    Application of Martensitic Stainless Steel Self-drilling Self-tapping Screws in Building Envelope System

    Application of Martensitic Stainless Steel Self-drilling Self-tapping Screws in Building Envelope System

    The steel structure enclosure system includes roofing system, wall system, lighting belt, edging and flooding, gutter and thermal insulation cotton. The enclosure system is one of the most important components of the light steel structure, which determines the ornamental appearance of the building, the waterproof and thermal insulation effect of the building. As an auxiliary fastener, self-drilling self-tapping screws play a vital role in the performance, quality and life of the overall building. It is not optimistic that as such an important basic component, our attention and research are far behind the attention and research on the main components of the building. The most prominent point is the neglect of the performance of fasteners and the main components of the building envelope system. match.

  • 0604-2020
    Discussion on the use of high-strength fasteners ...

    Discussion on the use of high-strength fasteners ...

    As a key functional part, high-strength fasteners play an important role in the function realization and safe operation of mechanical products. The correct use of high-strength fasteners is a link that cannot be ignored in the design and manufacture of mechanical products. At present, there is no unified method for the use of high-strength fasteners, and the practices of different industries and units are different. Therefore, it is necessary to communicate with each other and develop a scientific method of use to guide the design, manufacture, assembly and maintenance of products. Ensure the safe and stable operation of machinery. After researching and testing high-strength fasteners, this article summarizes the general use methods of high-strength fasteners from the aspects of characteristics, application, selection and assembly. Fasteners have a wide variety of specifications, large usage, and a wide range of applications. They are the most common type of standard parts in mechanical products. The reasonable selection of fasteners has also become an important part of the product design process. The correct use of the product directly affects the product's functional realization and safe operation. Compared with general fasteners, the use requirements of high-strength fasteners in product design, manufacturing, assembly, inspection and maintenance are very different. They also play a more critical role in the operation of equipment. Under the situation of diversified development such as large-scale, automation, and intelligence, high-strength fasteners are increasingly used as key functional parts, especially in critical occasions and important parts. At present, in the selection and use of high-strength fasteners, there are still various opinions and insufficient understanding, and it is necessary to do further research. This article mainly discusses the use of high-strength fasteners for mechanical products, and will not discuss the use of high-strength fasteners to replace general fasteners.

  • 3003-2020
    Washers for Loosening Fastening Schemes Commonly Used in Rail Transportation Industry

    Washers for Loosening Fastening Schemes Commonly Used in Rail Transportation Industry

    One of the fastening challenges that the rail transit industry needs to address is how to avoid bolt loosening due to dynamic vibration. In the connection of threaded fasteners, various types of alternating loads may be received under actual application conditions, and the partial failure of the threaded connection is usually caused by its own looseness and fatigue damage. Therefore, how to choose suitable anti-loosening products and rigorous anti-loosening designs for customers in the rail transit industry is one of the important tasks in the design of screwed fastening connections.

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