Jiangyin Hengye Forging Co., Ltd
Manufacturing method of forgings for power generation equipment
Power generation equipment forgings are manufactured through 6 processes of hot forging, heat treatment, turning, quenching and tempering heat treatment, finishing car and drill bit to manufacture 2MW wind turbine main shaft forgings; among them, the hot forging die is formed During the quenching and tempering heat treatment, tap water is used as the quenching medium, and the wind turbine main shaft forging is completely immersed in tap water for 20-60min during quenching, and then it is cooled by water and air. , 120min, put it into the furnace for tempering, let’s learn about the production method of forgings for power generation equipment!
Power generation equipment forgings
In today's society, with the increasingly serious problems of global energy shortage and environmental pollution, the search for renewable energy has become a major issue faced by countries around the world. On the other hand, compared with other energy sources, natural wind energy not only has large reserves, wide distribution, and inexhaustibility, but also has rapid deployment, short construction period, less basic investment than hydropower station construction, high flexibility, and can effectively suppress the greenhouse effect and sandstorms. Therefore, the use of wind power generation as a new energy development has become an important part of the world's future energy development strategy, which is highly valued and strongly supported by all countries. However, due to the immature manufacturing technology of wind power generation equipment, high wind power generation equipment, high wind power generation cost, and wind power price higher than coal power price, the rapid development of wind power generation is restricted. Power generation equipment forgings Power generation equipment Forging equipment The wind power main shaft of the MW-level wind turbine is the heavy weight of the wind power equipment. It needs to meet the specific use requirements such as load under strong wind energy and negative 40 ambient temperature, so it is mainly produced by forging. FIG. 1 is a schematic diagram showing an example of a conventional spindle manufacturing process.
Usually, the main shaft for wind power generation uses a heating furnace to heat the ingot (heat the ingot or the steel ingot to a high temperature above 1200°C, press and fix it with a punch press, and put the blank 1 between the upper die and the lower die of the hydraulic press by fixing, Press repeatedly in the longitudinal direction (lateral direction), and repeat the outer peripheral surface of the blank 2 with a die. The intermediate product formed by the forging of power generation equipment is significantly different from the required reference spindle, so rough machining and fine machining for forming perforations are used. The manufacturing process of the finished product is a simple rough ore, which meets the specific use requirements of unstable product quality, strong wind energy, large temperature difference, safe and stable load bearing, etc. Technical issues to be solved by power generation equipment forgings The invention provides a manufacturing process for a wind turbine main shaft forging. By improving the hot forging forming and quenching and tempering heat treatment process, a wind turbine main shaft forging with high toughness, low temperature resistance and high strength is obtained.
In order to solve the above-mentioned technical problem, the present invention is characterized in that  a new steel ingot is formed by sintering and flattening the riser and nozzle of the original steel ingot, and then, the new steel ingot is heated to a high temperature of 1200°C or more with a heating furnace, and the new steel ingot passes through once During the four processes of upsetting, Bafang upsetting, secondary upsetting and drawing and drawing 2), the nozzle end of the original steel ingot is used for the forging of the main shaft flange, and the riser end of the original steel ingot is used for the forging of the main shaft shaft. That is, starting from the bottom of the steel ingot, the height of the measurement is 540mm, the remaining steel ingot is first pulled out to the ingot shaft a with a diameter of 990mm, starting from the ingot shaft a close to the bottom of the steel ingot, the height of the measurement is 300mm, Pull out the remaining steel ingot shaft body a to a diameter of 960mm) and form a mold body with a cavity including a large-diameter cavity and a small-diameter cavity, which is arranged through from top to bottom, and the large-diameter cavity and the small-diameter cavity are coaxial. 4) Step 2) Clean the oxide scale on the surface of the stepped billet, after cleaning, lift the stepped billet into the flange mold for adjustment, press the large Make the flange head reach between 1800-1810mm in diameter and 280-290mm in height, and then adjust (5) Flatten the flange cover and clamp it, and pull out the shaft to the required size according to the drawing of the forging to form a wind turbine main shaft forging In the described quenching and tempering heat treatment, tap water is used as the quenching medium, during quenching, the wind turbine main shaft forging is completely immersed in the tap water for 20-60min, after the water temperature is controlled at 15-45C, the water is cooled in the air, and put into the furnace for tempering with 120min. The manufacturing technology of the wind turbine main shaft forging of the present invention improves the hot forging forming and quenching and tempering heat treatment process, adopts the forging technology of double upsetting and wide anvil drawing in the hot forging forming process, and fully guarantees the flaw detection requirements of the forging through forging deformation; When dividing, by using the nozzle end of the original steel ingot for the forging of the main shaft flange and the riser end of the original steel ingot for the forging of the main shaft shaft, the raw material of the steel ingot can be fully utilized and the manufacturing cost can be reduced; in addition, in the quenching and tempering heat treatment process During quenching, tap water is used as the quenching medium, so compared with the original use of quenching fluid or oil, there will be no environmental pollution, environmental protection and cost reduction; this production process enables the production of wind turbine main shaft forgings with high toughness , low temperature and high strength characteristics. Power generation equipment forgings The above is the production method of power generation equipment forgings. If you want to know more, please feel free to contact us!