The action of the piston pin
The main function of the piston pin is to connect the piston and connecting rod to transfer the gas force borne by the piston. The piston pin is a cylindrical pin installed on the skirt of the piston, the part of which passes through the small hole of the connecting rod. It is used to connect the piston and the connecting rod, and transfer the gas force borne by the piston to the connecting rod.
Structure and working principle
Piston pins are usually installed in full floating or semi-floating mode. The full floating piston pin can rotate freely between the connecting rod small head and the piston pin seat, while the semi-floating piston pin is fixed on the connecting rod small head. The piston pin is subjected to periodic impact load when it is working, and carries out pendulum movement, so it needs to have good strength and wear resistance.
Materials and manufacturing processes
In order to reduce weight, the piston pins are generally made of high-quality alloy steel and often made of hollow structure. This design not only reduces weight, but also improves its fatigue resistance.
What material is the piston pin usually made of
Low carbon steel, low carbon alloy steel
Piston pins are usually made of low carbon steel or low carbon alloy steel. For example, 15, 20, 15Cr, 20Cr and 20Mn2 steels are commonly used in engines with low load; In the reinforced engine, the use of high-grade alloy steel, such as 12CrNi3A/18CrMnTi2 and 20SiMnVB, sometimes can also be used 45 medium carbon steel.
The material selection of the piston pin is mainly based on its working conditions and design requirements. The piston pin is subjected to a large periodic impact load under high temperature conditions, and because the swing Angle of the piston pin in the pin hole is not large, it is difficult to form a lubricating film, so the lubrication condition is poor. In order to meet these requirements, the piston pin must have sufficient stiffness, strength and wear resistance. The selection of materials should ensure that the friction surface of the piston pin has a high hardness to meet the needs of high mechanical strength and wear resistance.
If you want to know more, keep reading the other articles on this site!
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAUXS auto parts welcome to buy.
