Wind-electricity shaft forging die

Abstract

The invention discloses a wind-electricity shaft forging die which can lighten the labor intensity and improve the working efficiency without secondary heating. The wind-electricity shaft forging die comprises a die holder and a die ring overlapped on the die holder, wherein the inner hole of the die holder is above 10 percent larger than the shaft end of a wind-electricity shaft blank, a cavity corresponding to the neck of the wind-electricity shaft blank is arranged at the top end of the die ring, a transition hole penetrating through the die ring is arranged at the bottom of the cavity, and the transition hole is above 45 percent higher than the cavity. Because the inner hole of the die holder is larger than the shaft end of the blank, the shaft end of the blank is not in contact with the die holder, and secondary heating is not needed, the forging quality of a wind-electricity shaft is ensured and the energy resources are saved. The die holder is detachably connected with the die ring, which greatly facilitates the operation, reduces the labor intensity and improves the working efficiency. Because the transition hole is provided, the accumulation can not happen at the edge of the bottom of the die ring when a flange head is forged, thereby greatly facilitating the normal operation of demoulding.

Description

technical field [0001] The invention relates to a forging die for processing wind power shafts for wind power generation. Background technique [0002] At present, the flange head and the shaft of the shaft end of the wind turbine are forged as an integral structure. Reach 1:2.5. In the traditional forging method, the steps are as follows: first, the billet is released, then the flange head is thickened by putting it into the mold, then the mold is turned over, the mold is placed on the pad, and the forging is separated from the mold by putting the mold release pad from the shaft end. , and then take out the blank, the manipulator clamps the shaft end and throws the flange head round, and after turning around, the manipulator clamps the rounded flange head and then forges the shaft end to make it reach the required size for forging. The main disadvantages of using this traditional forging die for forging are: [0003] 1. Since the wind turbine shaft forging is a large for...

AI Technical Summary

Problems solved by technology

[0003] 1. Since the wind turbine shaft forging is a large forging, weighing 13.5 tons, the forging die used to forge the forging is heavier, about 30 tons, making it very difficult to turn over the mold with the blank during the forging process. Heavy and troublesome things, high labor intensity and low work efficiency;

[0004] 2. After the shaft end of the billet is inserted into the mold, in the process of thickening the flange head, the contact between the shaft end of the billet and the inner wall of the mold will cool down rapidly, so that the forging temperature cannot be reached after demoulding, so that the billet cannot be corrected after demoulding. For normal forging of the shaft end, the shaft end must be reheated to reach the forging temperature before the shaft end can be forged; however, after the second heating, a coarse grain phenomenon will occur, resulting in a decline in the quality of the forging, which has a great impact on the mechanical properties of the wind turbine shaft. Unable to meet performance requirements at design time

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