Locomotive crankshaft forging is an important part of locomotive power system, its quality and performance have a direct impact on the stability and reliability of locomotive operation. This paper will analyze the production process of locomotive crankshaft forgings, in order to discuss the key links and technical requirements in the manufacturing process.
In the production process of locomotive crankshaft forging, the preparation of raw materials is the primary link. Usually, high-quality steel with high strength and high toughness is used as raw materials to ensure that it has sufficient mechanical properties to meet the working needs of the crankshaft. In the preparation process, the quality of raw materials must be inspected to ensure that their chemical composition and metallographic organization meet the relevant standards.
Blanking is the process of processing raw materials into billets that can be forged. According to the design size of the crankshaft forgings, the raw materials are processed into suitable billets by cutting, shearing or laser cutting to prepare for the subsequent forging process.
Forging is a key link in the production of locomotive crankshaft forging, which can change the internal structure of metal and improve its mechanical properties. In the process of crankshaft forging, it is necessary to adopt the appropriate forging temperature, deformation, forging ratio and other technological parameters to ensure the mechanical properties and fatigue life of the crankshaft. At the same time, it is also necessary to strictly control the defects generated in the forging process to prevent cracks, inclusions and other quality hazards.
Heat treatment is an important process to further optimize the mechanical properties of locomotive crankshaft forgings. Through proper heat treatment process, the internal structure of the metal can be adjusted to improve its hardness and wear resistance. Commonly used heat treatment processes include quenching, tempering, surface treatment, etc. The specific heat treatment program needs to be determined according to the performance requirements and material characteristics of crankshaft forgings.
Machining is the process of machining the forged crankshaft blank into the crankshaft forging that meets the design requirements. It mainly includes roughing, semi-finishing and finishing stages. In the machining process, the machining allowance, cutting parameters and other process parameters should be strictly controlled to ensure the dimensional accuracy and surface quality of the crankshaft. At the same time, the balance of the crankshaft needs to be tested and adjusted to ensure its stability at high speed.
In the production process and the finished product stage, strict quality inspection and finished product inspection of locomotive crankshaft forging should be carried out. The testing content should include dimensional accuracy, surface quality, mechanical properties and so on. The internal defects of crankshaft forgings are detected and controlled by non-destructive testing techniques such as ultrasonic testing and magnetic particle testing. The finished product inspection shall be carried out in accordance with the relevant standards to ensure that the finished product meets the design requirements and performance standards.
To sum up, the production process of locomotive crankshaft forging involves many links, and each link has an important impact on the quality of the final product. In the production process, the process parameters should be strictly controlled, and the quality inspection and finished product inspection should be strengthened to ensure the quality and reliability of the final product. At the same time, enterprises should also continue to introduce new technologies, new processes, improve production efficiency and product quality, in order to meet the market demand for high-performance locomotive crankshaft forging.
