Precision forging forming technology of large-specification straight-tooth bevel gear

Abstract

The invention discloses a precision forging forming technology of a large-specification straight-tooth bevel gear. The technology comprises the following steps that (1), a machining raw material is heated to 850 DEG C in an electric furnace; (2), a flat-mold mold is placed on the precision forging forming equipment, the tonnage of the forging machine is adjusted according to the size of the required straight-tooth bevel gear to carrying out upsetting on the material to reach the required thickness; (3), and an upper mold and a lower mold are heated to 350 DEG C under the mold opening state ofthe forging machine. According to the technology, the forming technology is suitable for machining the large-specification straight-tooth bevel gear, forming resistance is different when the gear is formed in different stages, so that the forming process is divided into warm forging forming and cold forging forming on the basis of original primary forming in the forming process; due to the fact that the changing of the forming resistance of the warm forging process in different stages is relatively large, the warm forging process is divided into three times in order to protect the mold, afterthe machining technology is improved, a set of mold is changed into four sets of molds by improving the mold, after the mold is improved, the forming equipment is improved according to the movement conditions of different parts of the mould during machining.

Description

technical field [0001] The invention relates to a large-scale straight bevel gear precision forging forming process, which belongs to the technical manufacturing field of gears. Background technique [0002] The gear precision forging technology refers to the gear manufacturing technology in which the gear teeth are directly obtained from the complete tooth shape through precision forging, and the tooth surface does not need to be cut, or only needs a little finishing. [0003] For a long time, straight-toothed bevel gears have been metal-cutting, with mature technology and reliable technology, but the metal fibers at the tooth root of the gear are cut off, which weakens the gear strength, and the cutting efficiency is low and the cost is high, which is not suitable for mass production. Although the traditional direct one-time forging method improves the processing efficiency and reduces material waste, the product precision is low and the mold wears seriously. Compared wit...

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Problems solved by technology

[0004] Ordinary one-time forging process cannot be processed in sections according to the forming resistance of the gear at different stages, resulting in serious wear of the mold, and the formed gear cannot be finished during one-time forging, resulting in low precision and flashing of the gear after forging, so an additional step is required The machining process improves the precision, thereby reducing the production efficiency of the enterprise

[0005] Aiming at the problems of low machining production efficiency, serious waste of materials, inability to remove flash and severe mold wear during one-time forging and pressing, it is necessary to improve the mold and processing technology to avoid problems caused by machining and one-time forging and forming, and improve And improve the forming effect and quality of the mold, reduce production costs, improve production efficiency, and improve the forming process of the mold

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