Metal stamping is carried out under the condition that the tool contacts the workpieces, which inevitably produces friction that prevents the metal from flowing. Due to the effect of friction, tool wear, and the workpiece is scratched, which can lead to cracks in the workpieces. It is also necessary to regularly replace tools. This article…
The processing of metal parts is not only related to daily life, but also related to the needs of economic and social development. The application of full-automatic stamping production line in is helpful to improve the production efficiency of metal parts stamping processing . How to realize fully automatic machining of metal parts and what is the principle? This article mainly…
In the fastener industry, there is a new flow drill fastening technology, which does not require pre-drilling and can be directly tapped under the closed profile to achieve connection. In the automotive industry, such as BMW, Mercedes, and Audi, this technology is being widely used. Here we want to introduce you to what is flow drill…
The role of aerospace fasteners is to connect thousands of components of the aircraft to form a whole, Transferring load in component diameter and coordinating deformation during loading. What Are The Standards For Aerospace Fasteners NASIn the field of aviation manufacturing, NAS is the most influential standard for British fasteners. It can not only cover commercial aircraft, but also…
A stud generally refers to double-ended studs, which are cylindrical fasteners with threads on both ends. For threaded fasteners, not only a certain anti-corrosion ability is required in use, but also the interchangeability of threads must be guaranteed. Studs generally require surface treatment, and there are many types of surface treatment. The common ones are…
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…
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