Views: 169 Author: Site Editor Publish Time: 2025-04-04 Origin: Site
Material Selection: Medium carbon steel such as 45# steel is usually chosen for its good comprehensive mechanical properties, which can meet the strength, toughness, and wear resistance requirements of the piston rod. In special working condition requirements, such as high temperature or corrosion environment, corresponding alloy steel or stainless steel can be selected.
Blank Preparation: The blank is generally obtained by forging. Forging can improve the material's organizational structure and enhance its mechanical properties and machinability. After forging, the blank needs to undergo annealing treatment to eliminate forging stress and improve the material's machinability.
Rough Machining: It includes sawing, rough turning of the outer circle, and rough boring of the inner hole. Sawing must ensure accurate dimensions and leave enough allowance for subsequent machining; rough turning of the outer circle and rough boring of the inner hole should quickly remove most of the allowance, but it is necessary to pay attention to controlling the machining accuracy to avoid uneven allowance affecting subsequent machining.
Heat Treatment: Quenching and tempering treatment is a key process in piston rod machining. Through quenching plus high-temperature tempering, the piston rod obtains good comprehensive mechanical properties, such as high strength, toughness, and hardness, to meet its performance requirements under complex working conditions.
Finish Machining: Finish turning is carried out on the outer circle and outer conical surface of the piston rod to ensure that the dimension accuracy and surface roughness meet the design requirements. For piston rods with coaxiality requirements, it is also necessary to adopt two-top clamps and other methods for machining to ensure the coaxiality of each machined part.
Surface Treatment: According to different service requirements, appropriate surface treatment methods can be selected, such as hard chromium plating, nitriding, carburizing, and so on. These surface treatments can improve the wear resistance, corrosion resistance, and fatigue strength of the piston rod and prolong its service life. For example, the piston rod of the hydraulic cylinder often adopts hard chromium plating treatment to enhance its wear resistance and corrosion resistance.
Quality Inspection and Control: In the whole machining process, it is necessary to strictly control the machining quality of each process, including dimension accuracy, shape accuracy, surface roughness, coaxiality, etc. At the same time, it is also necessary to conduct comprehensive quality inspections on the machined piston rod and use non-destructive testing methods to detect internal defects to ensure that the product quality meets the standard requirements.
In conclusion, piston rod machining requires comprehensive consideration of multiple aspects, strict control of each link to ensure that the produced piston rod has good quality and performance, and meets the service requirements of different mechanical equipment.
