Forging is commonly used in fastener manufacturing processes. The precision forging process with the advantages of high efficiency, low cost, low energy consumption and high quality, has been more and more widely used. Definition Of Forging Process In Manufacturing Of Fasteners Forging is a processing method that uses forging machinery to exert pressure on the metal blank for generating plastic deformation to obtain forge…
In the fastener forming processes, cold heading, hot heading and warm heading are the main processes, which are suitable for the production of bolts, screws, nuts and rivets. Here we introduce the differences which include advantages and disadvantages, comparisons of the three processes. Cold Heading Cold heading deforms the metal below its recrystallization point and is usually…
Cold heading is a forging method of upsetting metal bar using the mold at room temperature, which is a commonly used fastener manufacturing process. It is usually adopted to make the heads of screws, bolts, rivets, etc. This process can be used to reduce or replace cutting. Forging materials can be copper, aluminum, carbon steel, alloy steel, stainless steel…
Strength Classes (performance Classes) of Bolts, Screws, and Studs The national standard stipulates 10 grades, marked as 3.6 4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9. The above performance grades are applicable to coarse teeth M1.6～M39; fine teeth M8×1～M39×3. The purpose is to indicate the mechanical properties of the fastener. Meaning of Performance Class:…
Cold heading belongs to the category of metal pressure processing, which is one of the non cutting metal pressure processing technologies. In the formation process of fastening parts, cold extrusion heading is a main process. The cold extrusion process is the most suitable for production of bolts, screws, nuts, rivets. What is Cold Extrusion? Cold heading is an important part of precision plastic…
With the development of the automotive industry, the requirements for automotive fasteners have become higher and higher. The main kind of high-intensity automotive fasteners is bolts which all need to be treated with heat treatment to improve the comprehensive mechanical performance of the product and achieve the specified tensile strength. Heat treatment process technology is the key…
Fasteners are widely used in the aviation field. Aircraft wings are generally thin, but very tough. If we look at the plane up close, we can see that there are many rivets on the envelope of the plane. It is said that there are millions of rivets on a plane. So, why don’t the aircraft…
Screws are colorful. Screw fasteners with various colors, such as silver, black, yellow, purple, etc, have been seen everywhere. So how are these screws be made so colorful? Screw plating is a process to bring bright colors to screw fasteners and making them beautiful Screw plating adopted for colorful products When the screw has just been produced, it is very oily and dirty. At…
With the development of the aerospace industry, the demand for aerospace fasteners has increased rapidly. As aerospace fasteners are applied under an environment of high temperature, high pressure, and high intensity, their quality requirements are also particularly high. Here, we introduce some useful knowledge about aerospace fasteners. What are aerospace fasteners? The fastener is one kind of…
First of all, We Need to Understand What is a Self-Tapping Screw. In most cases, self-tapping screws are used for the connection between thin metal plates such as steel plates and saw blades. When connecting, first make a threaded bottom hole for the connected piece, and then screw the self-tapping screw into the threaded bottom…
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