CN113814344A - Gear forging process - Google Patents

Abstract

The invention discloses a gear forging process which comprises pretreatment, upsetting, punching, ring rolling, forming and normalizing, wherein the pretreatment comprises the steps of heating and heat preservation of a blank, upsetting by an air hammer, punching by a conical punching block, and spraying nylon powder in a die before forming. The process adopted by the invention can greatly improve the rate of finished products of the gear and improve the production efficiency.

Description

Gear forging process

Technical Field

The invention relates to a gear forging process.

Background

The gear determines the yield of the gear when forging the mould shaping, and the skew of blank leads to reducing with the mould laminating degree and can lead to the production of waste product, in order to improve gear yield and precision, generally need carry out the location to the blank of multi-angle, and production efficiency reduces.

Disclosure of Invention

The invention relates to a gear forging process, which improves the production efficiency and the yield of gears.

In order to realize the purpose, the method adopted by the invention is as follows: the gear forging process comprises the following steps of pretreatment, upsetting, punching, ring grinding, forming and normalizing:

(1) the pretreatment is carried out by heating 20CrMnTi as a raw material billet to 950-1000 ℃, and preserving heat for 3-5 hours;

(2) upsetting, namely hammering the preheated billet into upset by using an air hammer;

(3) punching by using a conical punching block, wherein the conical punching block is arranged in a circular ring in the center of a cross-shaped bracket, the periphery of the cross-shaped bracket is arranged outside a billet, and the reverse side of the cross-shaped bracket is punched again after one side of the cross-shaped bracket is finished;

(4) ring rolling is carried out on the punched steel billet in a ring rolling machine;

(5) heating the steel billet again, uniformly spreading nylon powder in a die of a friction press, and then forging and forming the steel billet;

(6) and (4) normalizing, and keeping the temperature of the formed gear at 900 ℃ for 2 hours.

The beneficial effects are as follows: the process adopted by the invention can greatly improve the rate of finished products of the gear and improve the production efficiency.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

The gear forging process comprises the following steps of pretreatment, upsetting, punching, ring grinding, forming and normalizing:

(1) the pretreatment is carried out by heating 20CrMnTi as a raw material billet to 950-1000 ℃, and preserving heat for 3-5 hours;

(2) upsetting, namely hammering the preheated billet into upset by using an air hammer;

(3) punching by using a conical punching block, wherein the conical punching block is arranged in a circular ring in the center of a cross-shaped bracket, the periphery of the cross-shaped bracket is arranged outside a billet, and the reverse side of the cross-shaped bracket is punched again after one side of the cross-shaped bracket is finished;

(4) ring rolling is carried out on the punched steel billet in a ring rolling machine;

(5) heating the steel billet again, uniformly spreading nylon powder in a die of a friction press, and then forging and forming the steel billet;

(6) and (4) normalizing, and keeping the temperature of the formed gear at 900 ℃ for 2 hours.

The process adopted by the invention can greatly improve the rate of finished products of the gear and improve the production efficiency.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.

Claims (1)

1. The gear forging process is characterized by comprising the following steps of pretreatment, upsetting, punching, ring rolling, forming and normalizing:

(1) the pretreatment is carried out by heating 20CrMnTi as a raw material billet to 950-1000 ℃, and preserving heat for 3-5 hours;

(2) upsetting, namely hammering the preheated billet into upset by using an air hammer;

(3) punching by using a conical punching block, wherein the conical punching block is arranged in a circular ring in the center of a cross-shaped bracket, the periphery of the cross-shaped bracket is arranged outside a billet, and the reverse side of the cross-shaped bracket is punched again after one side of the cross-shaped bracket is finished;

(4) ring rolling is carried out on the punched steel billet in a ring rolling machine;

(5) heating the steel billet again, uniformly spreading nylon powder in a die of a friction press, and then forging and forming the steel billet;

(6) and (4) normalizing, and keeping the temperature of the formed gear at 900 ℃ for 2 hours.