A forging process for a wind power generator motor shaft

Abstract

The invention relates to the technical field of forging of motor shafts, and discloses a forging process for a motor shaft of a wind power generator, characterized in that the process is composed of the following steps: S1, selecting a blank, and then uniformly heating the blank; S2, placing the heat-insulated blank into a forging die, and performing the first forging; S3, uniformly heating the first forging; S4, performing the second forging; S5, placing the second forging into a heating furnace for solid solution treatment, and controlling the elongation deformation of the second forging to be 14% to 35%; S6, sending the forging treated in S5 to 1200°C and then performing solid solution treatment in a heating furnace, and elongating the second forging. The forging process for a motor shaft of a wind power generator ensures that the blank is not directly heated by flame during the forging process of the motor shaft, the heating temperature is easy to control, and the phenomenon of uneven heat will not occur during the rapid heating process.

Description

Technical Field

[0001] The invention relates to the technical field of motor shaft forging, in particular to a wind power generation motor shaft forging process. Background Art

[0002] A wind turbine is an electric device that converts wind energy into mechanical work, which drives the rotor to rotate and finally outputs alternating current. A wind turbine generally consists of a wind rotor, a generator (including a device), a stabiliser (tail), a tower, a speed limit safety mechanism and an energy storage device.

[0003] The working principle of a wind turbine is relatively simple. The wind rotor rotates under the action of wind, which converts the kinetic energy of the wind into mechanical energy of the wind rotor shaft. The generator rotates and generates electricity under the drive of the wind rotor shaft. In a broad sense, wind energy is also solar energy, so it can also be said that a wind turbine is a heat energy generator that uses the sun as a heat source and the atmosphere as a working medium.

[0004] At present, the forging of the generator motor shaft is heated by a heating furnace, and the blank is heated by the flame generated by the fuel in the heating furnace. However, there are unstable factors in the flame heating treatment, and the heating temperature of the blank is difficult to control. Uneven heating will occur during the rapid heating process, and the forging strength of the generator motor shaft will be reduced, and the service life of the motor shaft will be shortened. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a forging process for a wind power generator motor shaft, which solves the problem that the current forging of the generator motor shaft is performed by heating in a heating furnace, wherein the blank is heated by a flame generated by fuel in the heating furnace. However, there are unstable factors in the flame heating treatment, and the heating temperature of the blank is difficult to control. Uneven heating occurs during the rapid heating process, and the forging strength of the generator motor shaft is reduced, thereby shortening the service life of the motor shaft.

[0006] In order to ensure that the blank is not directly heated by flame during the forging process of the generator motor shaft, so that the blank processing is more stable, the heating temperature is easy to control, and no uneven heat is generated during the rapid heating process, and the forging strength of the generator motor shaft is guaranteed, and the service life of the motor shaft is extended, the present invention provides the following technical solutions: A wind power generator motor shaft forging process, the process is composed of the following steps:

[0007] S1, selecting a blank, and then uniformly heating the blank, stopping heating when the heating temperature is greater than the set heating temperature, and performing heat preservation on the blank;

[0008] S2, placing the heat-insulated billet into a forging die, and performing the first forging, so that the deformation of the billet is 26% to 38%, to form a first forging;

[0009] S3, uniformly heat the first forging to make its heating temperature 10-20°C higher than the highest temperature in S1, and perform heat preservation treatment on the first forging;

[0010] S4, placing the heat-insulated first forging into a forging die, and performing a second forging, so that the deformation amount of the blank is 35% to 50%, to form a second forging;

[0011] S5, placing the second forging into a heating furnace for solution treatment, and controlling the elongation deformation of the second forging to be 14% to 35%;

[0012] S6, after being treated in S5, the forging is sent to a heating furnace at 1200°C for solution treatment, the second forging is stretched, and the stretching deformation is controlled at 15% to 40%, and the stretching process is completed in two fires, wherein the first fire is 1200°C for solution treatment for 1.5h, and the second fire is 1080°C for solution treatment for 1h, to form the third forging;

[0013] S7. The third forging is heated five times at a temperature of 680 to 860°C, and then subjected to five insulation treatments for 1.5 to 2 hours. The forging is then slowly and evenly cooled and immediately tempered to eliminate residual internal stress and refine the grains.

[0014] Preferably, the time for heat preservation treatment of the blank in S1 is 0.5 to 1.5 hours.

[0015] Preferably, the heating temperature in S3 is 12°C higher than the highest temperature in S1.

[0016] Preferably, the third forging in S7 is heated five times, and the temperatures of the five heatings are: 680°C, 760°C, 700°C, 800°C and 860°C, respectively.

[0017] Compared with the prior art, the present invention provides a forging process for a wind power generator motor shaft, which has the following beneficial effects:

[0018] The wind power generator motor shaft forging process comprises the following steps: placing a first forging subjected to heat preservation treatment into a forging die, performing a second forging, so that the deformation of the blank is 35% to 50%, forming a second forging, placing the second forging into a heating furnace for solid solution treatment, and controlling the elongation deformation of the second forging to be 14% to 35%, sending the forging subjected to treatment in S5 into a heating furnace at 1200°C for solid solution treatment, elongating the second forging, and controlling the elongation deformation to be 15% to 40%, and completing the elongation process in two firings, wherein the first firing is solid solution treatment at 1200°C for 1.5 hours, and the second firing is solid solution treatment at 1080°C for 1 hour, so as to form a third forging, ensuring that the blank is not directly heated by flame during the forging process of the generator motor shaft, so that the processing of the blank is more stable, and the heating temperature is easy to control, and no uneven heat phenomenon is generated during the rapid heating process, and the forging strength of the generator motor shaft is ensured, and the service life of the motor shaft is also extended. DETAILED DESCRIPTION

[0019] The following will be combined with the content of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] A forging process for a wind power generator motor shaft, the process comprising the following steps:

[0021] S1, selecting a blank, and then uniformly heating the blank, stopping heating when the heating temperature is greater than the set heating temperature, and performing heat preservation on the blank;

[0022] S2, placing the heat-insulated billet into a forging die, and performing the first forging, so that the deformation of the billet is 26% to 38%, to form a first forging;

[0023] S3, uniformly heat the first forging to make its heating temperature 10-20°C higher than the highest temperature in S1, and perform heat preservation treatment on the first forging;

[0024] S4, placing the heat-insulated first forging into a forging die, and performing a second forging, so that the deformation amount of the blank is 35% to 50%, to form a second forging;

[0025] S5, placing the second forging into a heating furnace for solution treatment, and controlling the elongation deformation of the second forging to be 14% to 35%;

[0026] S6, after being treated in S5, the forging is sent to a heating furnace at 1200°C for solution treatment, the second forging is stretched, and the stretching deformation is controlled at 15% to 40%, and the stretching process is completed in two fires, wherein the first fire is 1200°C for solution treatment for 1.5h, and the second fire is 1080°C for solution treatment for 1h, to form the third forging;

[0027] S7. The third forging is heated five times at a temperature of 680 to 860°C, and then subjected to five insulation treatments for 1.5 to 2 hours. The forging is then slowly and evenly cooled and immediately tempered to eliminate residual internal stress and refine the grains.

[0028] The time for heat preservation treatment of the blank in S1 is: 0.5-1.5h; the heating temperature in S3 is 12°C higher than the highest temperature in S1; the third forging in S7 is heated five times, and the temperatures of the five heatings are: 680°C, 760°C, 700°C, 800°C and 860°C respectively.

[0029] In summary, the process steps of the invention are: first, a blank is selected, and then the blank is uniformly heated, when the heating temperature is greater than the set heating temperature, the heating is stopped, and the blank is subjected to heat preservation treatment, and the time for the heat preservation treatment of the blank is: 0.5-1.5h, the heat-treated blank is placed in a forging die, and the first forging is performed, so that the deformation of the blank is 26%-38%, and the first forging is formed, the first forging is uniformly heated, and the heating temperature is higher than the highest temperature in S1 by 10-20°C, and the temperature is specifically 12°C higher, and the first forging is subjected to heat preservation treatment, the heat-treated first forging is placed in a forging die, and the second forging is performed, so that the deformation of the blank is 35%-50%, and the second forging is formed, and the second forging is placed in a heating furnace for solution treatment, and the second forging is subjected to heat preservation treatment. The forging is stretched and deformed by 14% to 35%. After being treated in S5, it is sent to a heating furnace at 1200°C and then subjected to solution treatment. The second forging is stretched and the stretching deformation is controlled at 15% to 40%. The stretching process is completed in two fires, wherein the first fire is solution treatment at 1200°C for 1.5h, and the second fire is solution treatment at 1080°C for 1h to form the third forging. The third forging is then heated five times, the five heating temperatures are 680 to 860°C, and the five heating temperatures are: 680°C, 760°C, 700°C, 800°C and 860°C, respectively. Then, five insulation treatments are carried out, and the five insulation times are 1.5 to 2 hours. The forging is then slowly and evenly cooled, and immediately tempered to eliminate residual internal stress and refine the grains.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forging process for a wind power generator motor shaft, characterized in that: The process consists of the following steps: S1, selecting a blank, and then uniformly heating the blank, stopping heating when the heating temperature is greater than the set heating temperature, and performing heat preservation on the blank; The time for the blank to be subjected to heat preservation treatment is: 0.5 to 1.5 hours; S2, placing the heat-insulated billet into a forging die, and performing the first forging, so that the deformation of the billet is 26% to 38%, to form a first forging; S3, uniformly heat the first forgings to a temperature 10-20°C higher than the highest temperature in S1, and perform heat preservation on the first forgings; The heating temperature is 12°C higher than the highest temperature in S1; S4, placing the heat-insulated first forging into a forging die, and performing a second forging, so that the deformation amount of the blank is 35% to 50%, to form a second forging; S5, placing the second forging into a heating furnace for solution treatment, and controlling the elongation deformation of the second forging to be 14% to 35%; S6, after being treated in S5, the forging is sent to a heating furnace at 1200°C for solution treatment, and the second forging is stretched, and the stretching deformation is controlled at 15% to 40%, and the stretching process is completed in two fires, wherein the first fire is 1200°C for solution treatment for 1.5h, and the second fire is 1080°C for solution treatment for 1h, to form the third forging; S7, heating the third forging five times, the five heating temperatures are 680-860°C, and then heat-insulating five times, and the five heat-insulating times are 1.5-2 hours, and then the forging is slowly and evenly cooled, and immediately tempered to eliminate residual internal stress and refine grains; The third forging was heated five times, and the temperatures of the five heatings were: 680°C, 760°C, 700°C, 800°C and 860°C, respectively.