Process for performing non-oxidation technical transformation on common medium-frequency forging furnace

Abstract

The invention discloses a process for performing non-oxidation technical transformation on a common medium-frequency forging furnace. The technical scheme adopted by the invention has the technical points that the common medium-frequency forging furnace consists of a nitrogen making machine, a nitrogen storage tank, a pipeline, a pressure gage, a circular ring-shaped air passage, more than four branch air passages and a furnace door, wherein the branch air passages are led to a hearth from the circular ring-shaped air passage, and the furnace body not only is normally closed but also automatically opens. Non-oxidation protection is performed on a to-be-heated workblank by nitrogen in the hearth, and the non-oxidation protection is also performed on the to-be-heated workblank by the nitrogen in a closed transporter from after the to-be-heated workblank is discharged from the furnace to before the to-be-heated workblank enters a forging die. The nitrogen can be charged to both ends from the middle of the hearth, also can be charged to the middle from both ends of the hearth, and also can be charged to the center of the hearth from one third of both ends of the hearth. The air passage can be integrated two sets of air passages and also can be an integrated single air passage. The air passage is made of a refractory material and is manufactured by using a special manufacturing process. The process has the application that the high-temperature non-oxidation technical transformation is performed on the medium-frequency forging furnace, and the goals that the energy is saved, the consumption is reduced and the cost is reduced are achieved.

Description

Technical field [0001] The invention belongs to the forging industry and the technical field of intermediate frequency furnace heating. Background technique [0002] For metal materials that need to be forged, when the forging deformation is relatively large, it is often necessary to heat the blank to the specified initial forging temperature of 1200 degrees. The metal blank will be severely oxidized in such a high-temperature environment. How to solve the oxidation problem of high-temperature heating , has always been a long-standing problem that plagues the forging industry, especially precision forging gear companies. Especially for precision forged gears that do not require subsequent machining of the tooth profile, visible oxidation defects can render the forging a scrap. The forging temperature has to be lowered to meet the requirements of eliminating oxidation defects, which will increase the billet making process and preliminary forging process, and will lead to a s...

AI Technical Summary

Problems solved by technology

Especially for precision forged gears that do not require subsequent machining of the tooth profile, visible oxidation defects can render the forging a scrap

The forging temperature has to be reduced to meet the requirement of eliminating oxidation defects, which will increase the billet making process and preliminary forging process, and will lead to a significant reduction in the service life of the forging die, which will bring direct cost pressure to the gear precision forging enterprise

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