Press quenching tool for thin-wall carburized inner gear ring of structure with oil holes in discontinuous outer gear

Abstract

The invention discloses a press quenching tool for a thin-wall carburized inner gear ring of a structure with oil holes in a discontinuous outer gear. The press quenching tool comprises a core mold base, a core mold positioning column is arranged on the core mold base, a core mold is mounted on the core mold positioning column, an inner pressing ring for pressing the upper end surface of the gear ring is arranged above the core mold, an outer pressing ring is arranged on the periphery of the inner pressing ring, the outer pressing ring is mounted on an outer pressing die, the outer pressing die is fixed through an outer pressing die screw, a pressing die reset spring is arranged on the outer pressing die screw, an outer pressing die limiting piece used for pressing the outer wall of the gear ring and an adjusting block are arranged on the periphery of the outer pressing ring, a sliding screw and a sliding sleeve are mounted at a round screw hole of the outer pressing die limiting piece, the adjusting block is mounted in an oval groove in the outer wall of the outer pressing die limiting piece, and the adjusting block is fixed by an adjusting block screw. According to the press quenching tool, the gear ring is convenient to mount and dismount, the shape correcting effect to the gear ring is good, the service life is long, and the press quenching tool is worthy of application and popularization.

Description

technical field [0001] The invention relates to the technical field of mechanical processing equipment, in particular to a press-quenching tool for a thin-walled carburized inner gear with an oil hole structure on a discontinuous outer gear. Background technique [0002] Planetary transmissions have been widely used in transmissions, aircrafts, and vehicles because of their characteristics of power splitting, high loads, and large transmission ratios. The ring gear is the core component of the planetary transmission mechanism. The material used is generally 20Cr2Ni4A steel. Carburizing and quenching methods are usually used to obtain high core toughness and surface wear resistance. The outer diameter is 350mm and the wall thickness is about 10mm. The thin-walled internal ring gear with discontinuous external teeth with a height of 70 mm and oil hole structure not only produces plane warping and elliptical deformation during the carburizing process, but also irregular distort...

AI Technical Summary

Problems solved by technology

The ring gear is the core component of the planetary transmission mechanism. The material used is generally 20Cr2Ni4A steel. Carburizing and quenching methods are usually used to obtain high core toughness and surface wear resistance. The outer diameter is 350mm and the wall thickness is about 10mm. The thin-walled internal ring gear with discontinuous external teeth with a height of 70 mm and oil hole structure not only produces plane warping and elliptical deformation during the carburizing process, but also irregular distortions in the tooth shape and direction of the shaving drilling part; the traditional The designed outer holding device is fixed on the double pulse pressure quenching tooling of the working platform. For the ring gear with regular carburizing deformation and small deformation, the loading and unloading and orthopedic effect of this tooling are good, but for the non-continuous outer gear with oil hole structure For the thin-walled inner ring gear, if the external holding device is used to fix the working platform, due to the large carburizing deformation and irregular distortion of the tooth shape and tooth direction, and the small gap between the external holding device and the mandrel, it will further increase Reduced the difficulty of loading and unloading parts

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