Auxiliary quenching fixture and quenching method of thin wall internal tooth ring

Abstract

The invention discloses an auxiliary quenching tooling of a thin-wall ring gear and a quenching method thereof, and is characterized by being capable of improving the quenching efficiency. The auxiliary quenching tooling of the thin-wall ring gear comprises a tooling body which is matched with the inner diameter of the thin-wall ring gear and a charging tray which is used for bearing the thin-wall ring gear; the tooling body comprises at least two sizing parts which are detachably connected, and the height of each sizing part is respectively matched with that of the thin-wall ring gear. The quenching method thereof comprises a step that the tooling body formed by combining the at least two sizing parts which are detachably connected is arranged in inner bores of at least two thin-wall ring gears for quenching treatment. Heating and quenching treatment can be simultaneously performed on more than two thin-wall ring gears when the height of a heating furnace is allowable, thus the tooling and the method can help greatly improve the quenching efficiency, and are particularly suitable for being popularized and used in the quenching process of various thin-wall parts.

Description

technical field [0001] The invention relates to a quenching tool and a quenching method, in particular to an auxiliary quenching tool and a quenching method for a thin-walled inner ring gear. Background technique [0002] At present, as one of the components of power transmission, the gearbox has been widely used in a wide range of applications. With the increasing power transmission and longer service life, the requirements for the accuracy of the gearbox and the performance of the whole machine are also increasing. The gearbox with high, carburized and quenched inner ring gear can meet the requirements of high transmission power and long service life, but the manufacturing quality of the inner ring gear directly affects the performance of the whole machine. The deformation control of large, thin-walled ring gears during carburizing and quenching has always hindered the application of carburized and quenched ring gears in gearboxes. [0003] It is understood that domestic ...

AI Technical Summary

Problems solved by technology

[0005] A. When the tooling is loaded into the inner ring gear, the inner ring gear is still in the heating furnace, and the temperature is quite high. The operator cannot approach the inner ring gear at all, let alone carefully align it. Therefore, when the tooling is loaded, only It takes a long time to load it under the command of the hoisting personnel and the commander, and it takes an average of 5 minutes for each installation. After a long time, the temperature of the inner ring gear will decrease, and the effect of quenching will be affected, which will also affect The quality of the product, and the shrinkage tooling of the inner ring gear may not fit in; and after installation, the tooling is also likely to cause inclination in the inner ring gear, which will increase the deformation of the inner ring gear

[0006] B. This kind of tooling is only suitable for quenching one internal gear at a time. Generally, the cycle of quenching one internal gear each time takes more than 30 hours, that is, only one piece (one device) can be quenched in more than one day. , which greatly restricts the manufacturing efficiency of parts and cannot satisfy the manufacturing of large quantities of gearboxes

[0007] C. The size design of the tooth top circle of the inner gear ring and the sizing circle of the tooling is unreasonable, the interference is too large, and the inner gear ring may crack easily, or it takes a long time to take out the inner gear ring or the tooling cannot be taken out

[0008] D. After quenching (cooling to room temperature), the method of taking out the tooling from the inner ring gear is not suitable for mass production

Images