Elastic Pin
Structural characteristics of Elastic Pin
Our Elastic Pin, also known as Elastic Pin, is a very practical connecting component in the mechanical field. It is made using our four slide machine, which is fast and cost-effective, and cannot be compared to stamping machines
We are a headless hollow cylindrical body with axial grooves and chamfered ends at both ends. This structural design makes it more convenient for us to insert into assembly holes. Chamfering can correct slight misalignment, while the hollow structure and slotting give us good elastic deformation ability. After being pressed into the hole, it can tightly fit with the hole wall through elastic deformation.
Divided by appearance: there are straight groove shaped, rolled shaped, and toothed elastic cylindrical pins. The elasticity of the straight groove elastic cylindrical pin is relatively low, only deforming at an opening of 180 degrees; Rolled elastic pins are processed by coiling strip materials and can replace connecting parts such as rivets, screws, bolts, etc. They can be used as connecting pins, positioning pins, transmission pins, and shaft pins; The super elastic rolled elastic pin can achieve maximum radial elasticity through a 2.5-turn spiral winding, mainly used for connecting thin-walled and fragile metal, plastic or ceramic components; The tooth shaped elastic cylindrical pin has a similar appearance to a regular elastic cylindrical pin, but the difference is that its axial groove is a staggered wavy tooth shape.
According to the shear load, straight groove and toothed elastic cylindrical pins are divided into light and heavy types, with the wall thickness and chamfer of heavy type pins being greater than those of light type pins. Rolled elastic pins are divided into light, standard, and heavy types.
Material and surface treatment of Elastic Pin
Material: The materials we usually use for manufacturing are carbon steel and stainless steel. Carbon steel materials are generally high-quality carbon steel and silicon manganese steel, which can achieve high strength and hardness after heat treatment. Commonly used stainless steel materials include austenitic stainless steels such as 304 and 201, as well as martensitic stainless steels, which have good corrosion resistance and oxidation resistance, and can maintain stable performance in harsh working environments. In addition, there are some special situations where materials such as copper are used to meet specific needs, such as in situations where good conductivity or diamagnetism is required.
Surface treatment: Conventional surface treatment methods include oxidation blackening, phosphating, and non electrolytic zinc sheet coating. Blackening treatment can form a black oxide film on the surface, increasing aesthetics and improving corrosion resistance to a certain extent; Phosphating treatment can form a layer of phosphate film on the surface, which can improve wear resistance and corrosion resistance, and facilitate subsequent lubrication treatment; Non electrolytic zinc sheet coating can provide good rust protection, but due to its low adhesion, coating peeling may occur when we deform. Due to our hardness range being within the high sensitivity range for hydrogen embrittlement, it is generally not recommended to perform galvanizing treatment to avoid hydrogen embrittlement, which may affect the performance and service life of the product.
Function characteristics of Elastic Pin
Connection fixation: With the elastic deformation characteristics, after insertion into the hole, due to the slightly larger diameter than the assembly aperture, pressure will be generated, causing friction between us and the hole wall, effectively preventing relative movement of the parts in the axial direction and achieving a firm connection fixation.
Load bearing: When subjected to axial load, it can produce elastic deformation, absorb some of the load and disperse it to the surface of the connecting parts, protect the parts from excessive pressure and damage, and can withstand certain shear and tensile forces.
Absorption of vibration and impact: The elasticity of materials allows us to reduce the impact of external vibration or impact on connected parts through elastic deformation, protecting the normal operation of equipment and extending its service life.
Simplified assembly and disassembly: The structure is simple, and during installation, we only need to press ourselves into pre drilled holes without the need for complex installation tools and processes. Compared with connection methods such as bolts and screws, it can simplify the assembly process and improve assembly efficiency. When disassembling, due to the relatively low pressure generated during assembly, it can be relatively easy to remove with the help of appropriate tools, without causing serious damage to the parts, making it convenient for equipment maintenance and upkeep.
Application area of Elastic Pin
We are widely used in various assembly environments with impacts and vibrations. In automobile engines, it is used to connect and fix some components, such as valve lifters, piston pins, etc., which can withstand the vibration and impact generated during engine operation; In machine tool equipment, it can be used to connect transmission shafts, gears and other parts to ensure the stability and reliability of transmission; In construction machinery such as cranes and concrete mixers, they also play a role in connecting and fixing key components, adapting to complex working environments and frequent vibrations.
