Rapid forming process of large flange of high-power wind power main shaft

Abstract

The invention discloses a rapid forming process of a large flange of a high-power wind power main shaft. The process comprises the steps of (1) casting of a steel ingot blank material, wherein the steel ingot blank material includes a main body and a riser, then a water opening is cut off, and the trim part of the riser is cut off; (2) preliminary forging on fire, wherein a blank material feedingfurnace is heated to 1170-1230 DEG C, the temperature is kept for 7-12 hours, upsetting is conducted until the height is H, pulling is conducted until the blank material is 1.7-2.3H long, then upsetting is conducted again until the height is H, and branch materials in eight directions are pulled; (3) secondary forging on fire, wherein the blank material is sent back to the furnace for being heatedto 1170-1230 DEG C, the temperature is kept for 5-10 hours, then steps are pulled out, the riser is thermally cut, and the blank material is placed in a padding mold and a flange mold and forged andformed to obtain the large flange by adopting a partial upsetting mode. The process can effectively solve problems in free forging methods of conventional shafts, rapid forming of the large flange endof the high-power wind power main shaft is achieved, the machining allowance is small, there is no need to consider the problem of drawing out a concave core, and the tangential performance of the large flange of the wind power main shaft can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of wind power main shaft forging, and in particular relates to a rapid prototyping process of a large flange of a high-power wind power main shaft. Background technique [0002] The wind power main shaft is the core component connecting the fan blades and the speed-increasing gearbox, and is the core component of the high-power wind turbine. The commonly used shapes of wind power main shaft are as follows: figure 1 and figure 2 As shown, one end is a large flange, and the other end is a stepped shaft section, and the junction between the stepped shaft section and the large flange is a large transition arc. The large difference between the outer diameter of the large flange and the outer diameter of the stepped shaft section makes the forging of the wind power main shaft more difficult. According to the conventional shaft free forging method, the following needs to be considered: [0003] 1. It is easy to...

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Problems solved by technology

[0008] Therefore, in view of the technical problems in the prior art that the wind power main shaft passes through the conventional shaft free forging method, the machining allowance is large, the cost is high, and the performance of the large flange cannot be guaranteed, the purpose of the present invention is to provide a large flange for a high-power wind power main shaft Rapid prototyping process can effectively reduce machining allowance and cost, while ensuring the performance of large flanges

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