Pressing and punching mold for hub reduction gear outer gear ring

Abstract

The invention discloses a pressing and punching mold for a hub reduction gear outer gear ring. The pressing and punching mold for the hub reduction gear outer gear ring is composed of an upper die and a lower die; the lower die consists of a fixed bracket support, a quenching support, an expander, an annular spring ring, a pressing and fixing device, a compression return spring, an operating bearing platform and a cooling cylinder; the parts installed on the operating bearing platform are sequentially the fixed bracket support, the quenching support and the cooling cylinder from inward to outward; the expander and the pressing and fixing device are installed on the upper part of the fixed bracket support; the conical surface of the pressing and fixing device is matched with the conical surface of the expander; a cylinder at the lower part of the pressing and fixing device extends into a central hole of the fixed bracket support through a central hole of the expander; the compression return spring is installed in a cylindrical hole of the lower end of the pressing and fixing device; the compression return spring is supported in a hole of the operating bearing platform; the upper die consists of an upper pressing die and a lower pressing plate and a lower pressing column on a press; the upper pressing die is connected to the lower pressing plate on the press through a bolt; a middle round hole of the upper pressing die and the lower pressing plate is the lower pressing column on the press.

Description

technical field [0001] The invention belongs to the technical field of dies used in the heat treatment process, and in particular relates to a press-quenching die for the outer ring gear of a wheel-side reducer. Background technique [0002] In order to improve the driving force, the current off-road vehicles and heavy-duty vehicles are equipped with a wheel reducer in the drive axle. An important part of the wheel reducer is the outer ring gear of the wheel reducer. The existing wheel reducer The heat treatment and quenching technology of the outer ring gear adopts the nitriding method. This nitriding method is to put the metal workpiece into a pressure vessel, and make nitrogen atoms penetrate into the surface layer of the workpiece at a certain temperature in a certain medium. However, The nitriding layer of nitriding parts is generally shallow, and it is more difficult to go deeper, so it is not enough for general nitriding parts to bear heavy loads. There is also a car...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is aimed at the above-mentioned problem one: the nitriding layer after nitriding and quenching is relatively shallow for the outer ring gear of the wheel reducer, and it is more difficult to get deeper, and the outer ring gear of the nitrided wheel reducer The problem of insufficient heavy load; the second technical problem to be solved is that the carburizing process of the outer ring gear of the wheel reducer is more difficult to operate. During carburizing, quenching and cooling, the material of the outer ring gear of the wheel reducer shrinks and deforms during cooling. Effectively control the excessive deform

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