Crankshaft Forging Process

The crankshaft forging process involves heating a metal billet and then forging it with a hammer, press, or other equipment to form a crankshaft. The specific process flow is as follows:

1. Material Selection: Common crankshaft materials include cast iron, alloy steel, and fine steel. The material selection is determined based on factors such as the crankshaft's application, load, and durability.

2. Heating: The selected metal billet is placed in a forging furnace and heated to an appropriate temperature, typically above 1200°C, to soften the metal and facilitate forging.

3. Forging: After heating, the metal billet is placed in a forging machine, where pressure is used to plastically deform the metal and hammer it into the shape of the crankshaft. Forging is generally divided into multiple steps, each requiring a specific amount of work and deformation, and requiring the finished shape, dimensions, and mechanical properties to meet specified requirements.
4. Heat Treatment: After forging, the crankshaft undergoes annealing or quenching to eliminate internal stresses and improve its microstructure and mechanical properties.
5. Machining: After heat treatment, the crankshaft undergoes grinding, turning, and other machining processes to further improve its precision and surface quality.
6. Inspection: Finally, the finished crankshaft undergoes various inspections and tests to ensure it meets design requirements and exhibits excellent performance and durability.

Crankshaft forging is a complex process that requires specialized skills and high-precision equipment to ensure the quality and performance of the final product.