Direct-Faced Crank Manufacturing Technology and Special Processes
From the perspective of current technology production, the emergence of direct-faced crankshaft is not only the result of peoples continuous progress in machine manufacturing, but also an important symbol of the production level of Chinas automotive engine and machine manufacturing. At present, the direct-faced crank has become a popular product both at home and abroad, and its unique structure and manufacturing process have also become a representative of the level of modern machine manufacturing.
Direct-face crankshafts are a type of crankshafts that are machined on both ends, which are typically used in aircraft and Mro applications. Due to its characteristics as a single part with a high degree of integration and its superior performance, it has gradually become the preferred product for many users.
The direct-faced crank is composed of two parts: the central section and the two end faces. The central section is composed of bearing seats and radial shafts connected by axles. The two end faces are generally flat or spliced and are connected to the drive seat and the manual seat. The hollow portion is machined towards the center, and the eccentricity and torsional angle are machined on the other side.
The direct-faced crank is formed by a series of special processes such as hot forging, machining, heat treatment, grinding and assembly. Firstly, the crankshaft is formed by hot forging process, and the typical forging process is: preheating and pressing, pre-forging and intermediate forging, and blank punching. Then, the cut-off process, turning process and grinding process are carried out to obtain the required shape and precision of the parts. After that, the parts are heat treated accordingly, such as tempering and quenching. Finally, the crankshaft is assembled with other components and the specific process is according to the different types of the crankshaft.
The production of direct-faced crankshaft faces many challenges, such as higher precision machining requirements and complicated assembly process. As precision equipment, the direct-faced crankshaft needs to require machining accuracy up to few microns, so the traditional cutting technology has been unable to meet the requirements of accuracy machining. Therefore, the advanced machining technology such as laser cutting, ultrasonic cutting and electrochemical processing technology has become an important means of obtaining this type of crankshaft. In addition, the assembly process of direct-faced crankshafts is also very complex, requiring the use of sophisticated equipment and techniques to ensure the structural stability and reliable operation of the crankshaft.
Direct-face crankshafts are widely used in aircraft, industrial machinery, cars, ships and other key fields due to their many advantages. Therefore, mastering the technology and process of direct-face crank manufacturing is important to product development and application of the direct-faced crankshaft.
