Wind power flange half die forging process

Abstract

The invention relates to a wind power flange half die forging process, and belongs to the technical field of electric furnace steelmaking equipment in the metallurgical industry. According to the technical scheme, a heated continuous casting billet is upset according to a conventional upsetting method, so that a circular continuous casting billet is changed into a circular truncated cone shape with a large middle part and two small ends; and then, a special upsetting tool is used for upsetting, during upsetting, after the upper end face of the continuous casting billet subjected to conventional upsetting is pressed and upset according to a set anvil distribution mode, the continuous casting billet is overturned by 180 degrees, the lower end face of the continuous casting billet is pressedand upset according to a set distribution mode until the continuous casting billet is pressed with the thickness and the diameter meeting the requirements of a wind power flange, and finally, the continuous casting billet is turned over by 90 degrees after being pressed with the thickness and the diameter meeting the requirements of the wind power flange, and protrusions in the circumferential direction are flattened. The method has the beneficial effects that looseness and shrinkage cavities in the casting state can be effectively forged, the situation that the internal structure of the windpower flange is not compact or uniform is avoided, and it is guaranteed that the product quality can meet the flange requirement.

Description

technical field [0001] The invention relates to a half-die forging process of a wind power flange, belonging to the technical field of electric furnace steelmaking equipment in the metallurgical industry. Background technique [0002] Forging is a processing method that uses forging machinery to apply pressure to metal blanks to cause plastic deformation to obtain forgings with certain mechanical properties, certain shapes and sizes. Forging can eliminate defects such as as-cast porosity produced in the metal smelting process, optimize the microstructure, and at the same time preserve the complete metal flow line. [0003] As a clean and renewable energy, wind energy has attracted more and more attention from various countries. Wind energy works through air flow, which contains huge energy. Therefore, wind power generation has attracted more and more attention, and wind power flanges are used for A structural member connecting the tower and the hub, and between the hub and ...

AI Technical Summary

Problems solved by technology

[0004] At present, the existing technology of wind power flange is hot forging with continuous casting billet, and forming by ring rolling. Hot forging uses press for free forging, forging is produced by direct upsetting, and then the initial forging billet is completed by punching. This kind of upsetting method is easy to cause unqualified ultrasonic flaw detection, which cannot meet the requirements of delivery flaw detection; for the upsetting method, see figure 1

[0005] Due to the inability of the existing technology of wind power flange to effectively forge the porosity and shrinkage cavity in the as-cast state, the structure of the wind power flange is not dense and there is a problem of unevenness. When testing the mechanical properties (tensile test and impact test), it is easy to In the weak part of the tissue, it will lose stability first, resulting in relatively low mechanical properties, and even the problem of inconsistent performance.

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