Ring forging and rolling processing method of bearing ring parts used for large-scale wind turbine unit

A technology of wind turbines and processing methods, applied in applications, household appliances, and other household appliances, can solve problems such as high cold brittleness, poor ability to resist harsh environments, and complicated processes, and achieve strong toughness, good hardenability, and reduced cost effect

Inactive Publication Date: 2012-07-11
SHANDONG IRAETA HEAVY IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing technology, only one ring can be processed each time in the rolling and expanding process, and it needs to go through four fire times, and the heat treatment is normalizing and tempering. Disadvantages such as poor environmental ability

Method used

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  • Ring forging and rolling processing method of bearing ring parts used for large-scale wind turbine unit
  • Ring forging and rolling processing method of bearing ring parts used for large-scale wind turbine unit

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Embodiment Construction

[0026] The invention discloses a processing method of a bearing ring for a large-scale wind power generating set which is processed by forging and rolling the ring. The method mainly adopts the processing process of hot rolling and heat treatment, and cooperates with a specially designed composite mold to achieve To achieve the purpose of obtaining two bearing rings in one roll, the main steps are:

[0027] 1) Cutting: The steel ingot is cut according to the required thickness of the bearing rings for two large wind turbines to make a billet. The raw material is 42CrMo4, of which C0.41%, Si0.26%, Mn0.75%, P0.011 %, S0.005%, Ni0.02%, Cr1.09%, Mo0.17%, O≤0.0025%, N≤0.009%, H≤0.0002%, V0.005%, Cu0.014%, Al0.024 %, Ti0.003%, first calculate the weight of the two bearing rings, and then based on twice the weight, plus 2.5% consumption, that is the weight of the blank.

[0028] 2) First heating: heat the billet to 1220°C by the heating furnace, keep it for 150 minutes, and take it ...

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Abstract

The invention discloses a ring forging and rolling processing method of bearing ring parts used for a large-scale wind turbine unit. The technical scheme of the invention is that the processing method comprises the following steps: (1) blanking; (2) heating by a first heating number; (3) forging and making a blank forming; (4) heating by a second heating number; (5) chambering and reforming; (6) heating by a third heating number; (7) carrying out diameter expansion and ring rolling; (8) cutting two connected bearing ring part workblanks which are obtained in the step (7) to obtain a single workblank; and (9) thermally treating: normalizing, quenching and tempering. The processing method disclosed by the invention has the following beneficial effects: compared with the prior art, four heating numbers are decreased to three heating numbers; two ring parts can be obtained by one-time rolling and expanding processing through the improvement of a mold, so that the production efficiency is improved, the cost is lowered, and good combination property of a flange is ensured; and the bearing ring parts processed by the processing method of the invention have high strength, good hardenability, strong toughness, small deformation in the quenching, and stronger creep strength and persistent strength at the high temperature, and are applied to a large-scale wind turbine unit in a severe environment.

Description

technical field [0001] The invention relates to the technical field of large-scale wind turbine processing, in particular to a method for forging and rolling bearing rings for large-scale wind turbines. Background technique [0002] Due to the relatively mature technology, low cost and effective reduction of carbon dioxide emissions in the field of renewable energy, wind power generation has developed rapidly around the world, and the supply of wind power equipment is in short supply. The outer ring of wind power bearings is one of the wind power equipment One of the key components, the bearing outer ring for large wind turbines generally uses a rolling machine to make the billet produce a plastic processing process in which the wall thickness is reduced, the diameter is enlarged, and the cross-sectional profile is formed. Rolling and expansion has the following advantages: 1) Deformation method It is a continuous gradual change of non-uniform deformation in the three-dimens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K21/02B21J1/06
Inventor 牛余刚陈吉元景财年陈玉兴
Owner SHANDONG IRAETA HEAVY IND
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