Free Forging Forming Method of Turbine Generator Rotor

Abstract

The invention provides a turbo-generator rotor hammer forging forming method. The method comprises the following steps of manufacturing a turbo-generator rotor steel ingot; heating for the first timeand pressing a pincer handle, conducting pre-drawing outing, and preparing a hot water cutting opening, wherein the weight of the hot water cutting opening accounts for 8% of that of the total steel ingot; 2, heating for the second time and upsetting for the first time, upsetting until the ratio of the height to the diameter of a blank is 0.8:1 to 1:1, adopting a KD compaction method for drawing out, and conducting full-anvil feeding, wherein the rolling reduction is 20% of the height of the blank before rolling, half an anvil is staggered, and the steel ingot of which the dead head end accounts for 5% of the total weight of the steel ingot is rolled into the pincer handle; 3, heating for the third time and upsetting for the second time, upsetting until the ratio of the height to the diameter of the blank is 0.45:1 to 0.55:1, adopting a compaction method for drawing out, and conducting full-anvil feeding, wherein the rolling reduction is 25% of the height of the blank before rolling, and half an anvil is staggered; 4, heating for the fourth time, rotating a spring swaging die for drawing out, conducting shoulder chopping, and drawing out the diameters of all parts, wherein the 1.6forging ratio is reserved; 5, heating for the fifth time, forging a finished product, and quickly putting the finished product into water within 10 min to be cooled. By means of the turbo-generator rotor hammer forging forming method, the upsetting frequency can be reduced, the forming efficiency of the product is improved, the forging ratio is reserved at the last time of heating for forming, andthe grain size and quality of the product can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of free forging forming of a large turbogenerator, and in particular relates to a free forging forming method of a turbogenerator rotor. Background technique [0002] figure 1 The structural diagram of the 300MW turbogenerator rotor is shown. The biggest feature of this type of forging is that the forging has a large diameter, a long length, complex stress conditions, and high quality requirements. According to experience, the free forging process of this kind of forgings at home and abroad usually adopts three times of upsetting, three times of WHF method, two times of JTS method, and one time of KD compaction method. . [0003] For the production of such parts, the disadvantages of this forging process are as follows: [0004] (1) The process is complex and the production efficiency is low; [0005] (2) There are many fire times and high consumption; [0006] (3) The finished product has no forging ra...

AI Technical Summary

Problems solved by technology

[0004] (1) The process is complex and the production efficiency is low;

[0005] (2) There are many fire times and high consumption;

[0006] (3) There is no forging ratio heating for the finished product, the grains are coarse, and the subsequent heat treatment is difficult

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