Method for producing wind-electricity principal axis with gathering stock full fibre upset forging

Abstract

The invention relates to a method for producing a wind-power mainshaft by local continuous upsetting and all-fibre upset forging. The method comprises the following: step one, the heating of steel ingot; step two, forging; step three, first heat processing; step four, rough machining and ultrasonic inspection; step five, quenching and tempering and heat processing; step six, fine machining, wherein, during the step two, the forging comprises that: (1) a first fire, during which, a steel ingot is subject to upset forging at a forging temperature of between 1250 and 900 DEG C; firstly, the bottom of the steel ingot is sawed off, and the steel ingot is subject to capping and upset forging; (2) a second fire, during which, the steel ingot is stretched towards various directions, marked and subject to intermediate billet cogging; after a pole part is molded, scrap on a T end is chopped and removed; after the forging is finished, the steel ingot returns to a heating furnace for being reheated; (3) a third fire, during which, the steel ingot is subject to local continuous upsetting and all-fibre upset forging; (4) a fourth fire, during which, the steel ingot is subject to rolling and leveling; the pole part is stretched; the disc edge of a hub end on the head part of an intermediate billet material after the local continuous upsetting and all-fibre upset forging is subject to rolling operation; after the rolling, the intermediate billet material is inserted into a leaking disc component again; the end face of the disc is pressed and leveled; after the shaping of the disc end is completed, a manipulator clamps the disc and stretches the pole part of the intermediate billet material to a dimension of a forgeable piece; thus, the mainshaft forging is completed. The method can improve the fatigue resisting strength of a wind-power mainshaft forging piece.

Description

technical field [0001] The invention relates to a method for producing a wind power main shaft. It belongs to the technical field of wind power generators. Background technique [0002] The wind power main shaft is the main core mechanical component of the wind turbine. This component is directly connected with the wind blades to form a huge "ferris wind wheel" with a diameter of about 80-90 meters. The huge wind wheel carries the natural wind and transfers its energy to the generator through the mechanical gear device to convert it into electrical energy. The surviving wind speed of modern wind turbines is 60-70 m / s, and the wind speed range of what we usually call a 12-level hurricane is only 32.7-36.9 m / s, which means that the wind turbines must be more than twice the speed of a 12-level hurricane. It will not be damaged by wind speed. During the typhoon season, the direction and size of the hurricane change erratically, which makes the blades and the main shaft bear ...

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