With the rapid development of new energy, wind power has been widely used as a clean renewable energy. In the wind turbine, the wind power spindle forging as one of the key components, plays an important role in carrying the fan blade and transmitting power. Extrusion process is an important method to manufacture wind power spindle forgings. This paper mainly introduces the extrusion process and die design of the wind power spindle forging.
First, extrusion processing technology characteristics:
- High efficiency: extrusion processing is an efficient metal forming processing method, which can press raw materials into complex shaped shaft parts in a single processing process, reducing the processing process and improving production efficiency.
- High material utilization rate: extrusion processing can effectively use raw materials and reduce waste generation. Compared with traditional cutting processing methods, extrusion processing has more obvious advantages in material utilization.
- Tight internal structure: Through extrusion processing, the interior of the metal material tends to be uniform and the grain becomes thinner, thereby improving the strength and wear resistance of the material.
- Reduce processing accuracy requirements: Because extrusion processing can form complex shaped parts at one time, it can reduce subsequent processing procedures and requirements for processing accuracy, reducing manufacturing costs.
Second, wind power spindle forging extrusion processing technology and mold design:
- Material selection: wind power spindle forging needs to have high strength and good toughness. Commonly used materials are 40Cr, 42CrMo and other alloy steel. According to the actual needs, the wind environment and mechanical properties requirements need to be considered in the selection of materials.
- Mold design: Mold is a key equipment for extrusion processing, and its design directly affects the quality and production efficiency of the finished product. The design of the mold should consider the following aspects:
(1) Geometry: According to the shape and internal structure requirements of the wind power spindle forging, design the appropriate mold geometry. Factors that need to be considered include the shape of the outer profile of the forging, the location and number of holes.
(2) Cavity design: The cavity is the cavity used to form the shape of the forging in the mold. The complexity of the forging shape and the manufacturability of the die should be considered in the design to ensure the compact structure and accurate size of the die cavity.
(3) Material selection: The mold material should have high strength, good wear resistance and thermal stability. Commonly used mold materials are alloy tool steel, high-speed steel and so on.
(4) Lubrication system design: In the extrusion process, in order to reduce the friction between the mold and the material, reduce the forming force and extend the life of the mold, it is necessary to design a suitable lubrication system to ensure that the surface of the mold maintains a good lubrication state.
3 extrusion process parameters: The success of extrusion processing is the key to reasonable control of extrusion process parameters. The main process parameters include extrusion temperature, extrusion speed, extrusion pressure, etc. It is necessary to adjust and optimize according to different material and part requirements to ensure the stability of the extrusion process and the quality of the finished product.
- Quality control: Strict quality control is required in the extrusion process. Non-destructive testing methods can be used to inspect the finished product, such as ultrasonic detection, X-ray detection, etc., to ensure the quality and reliability of the finished product.
Through reasonable extrusion process and die design, wind power spindle forging can be manufactured efficiently. This not only improves production efficiency and reduces costs, but also ensures the quality and mechanical properties of finished products, making an important contribution to the development of wind power generation. In the future, with the continuous progress of technology, the extrusion processing process and die design of wind power spindle forgings will be gradually optimized to meet higher performance requirements.
