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The pull rivet is a kind of nail with a quite special structure. It uses the principle of Hooke's Law to closely and irreversibly connect the rivet and the rivet ring, which has a very good fixed effect and has the characteristics of never loosening. It has an irreplaceable good effect in many production and connection processes, and is still used in many places to replace welding.
The effect of this type of nail is extremely excellent because it is different from ordinary bolts and nails in that it is fixed by torque. This type of rivet directly adopts the form of pressure extrusion, which drives the nail opening into a certain shape design, making it "easy to enter and difficult to exit", making the nail able to play a very good fixing role.
The use of pull rivets requires the use of special tools, which cannot be manually nailed. Generally speaking, rivet guns or riveting machines are now used to quickly and effectively splice rivets, whether they are metal, wood, or other materials.
Early rivets were small studs made of wood or bone, and early metal deformation bodies may be the ancestors of rivets as we know them. Undoubtedly, they are an ancient method known to humans for connecting metals, dating back as far as the early use of malleable metals. For example, in the Bronze Age, the Egyptians used rivets to fasten the six wooden fan bodies on the outer lines of slotted wheels together. After the Greeks successfully cast large statues with bronze, they used rivets to rivet the various components together. Nowadays, there are more and more types of rivet development, mainly to adapt to the development of various enterprises.
"Stainless steel standard parts" is a specific terminology concept that encompasses a wide range of products. Stainless steel standard parts are typically used for fastening more expensive machine parts due to their beauty, durability, and strong corrosion resistance. With the progress of society, high requirements have been put forward for stainless steel standard parts. Stainless steel standard parts also refer to stainless steel screws, which are standard screws. The specifications, dimensions, and tolerance range are all in accordance with national standards.
Stainless steel standard parts have their own requirements for production materials. Most stainless steel materials can be made into steel wires or bars for fastener production, including austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, and precipitation hardened stainless steel. So what are the principles for selecting materials? The selection of stainless steel materials is mainly considered from the following aspects:
1. Requirements for mechanical properties, especially strength, of fastener materials;
2. Requirements for corrosion resistance of materials under operating conditions;
3. Requirements of working temperature on heat resistance (high-temperature strength, oxidation resistance) of materials;
4. Requirements for material processing performance in terms of production process;
5. Other factors, such as weight, price, and procurement, should be considered.