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Novel flange forging stock production process

A production process and flange technology, applied in the field of new flange forging billet production process, can solve the problems of high labor cost, long milling time, material loss, etc., and achieve the effect of uniform performance, low hardness and high tensile strength

Inactive Publication Date: 2018-09-07
安徽铜陵丰林法兰制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the manufacturing process of the flange, it is usually directly machined (lathe processing, milling machine processing, etc.) Very serious, accounting for 40%-50%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A novel flange forging production process, the production process of the flange forging comprises the following steps:

[0013] a. After the raw material round bar is cut, it enters the electric furnace for heating, and adopts a four-stage heating method. The heating temperature of the first stage is 800°C, and the time is 12s; the heating temperature of the second stage is 930°C, and the time is 25s; the third stage The heating temperature of the stage is 840°C, and the time is 15s; the heating temperature of the fourth stage is 720°C, and the time is 28s;

[0014] b. After the heated raw material round bar is cooled to room temperature, put it into the punch press and forge it into the required flange shape;

[0015] c. Then put it into a friction press, and cold-extrude it on the mold to the basic size of the flange; and then undergo solution heat treatment to form a flange blank.

Embodiment 2

[0017] A novel flange forging production process, the production process of the flange forging comprises the following steps:

[0018] a. After the raw material round bar is cut, it enters the electric furnace for heating, and adopts a four-stage heating method. The heating temperature of the first stage is 825°C, and the time is 15s; the heating temperature of the second stage is 960°C, and the time is 28s; the third stage The stage heating temperature is 860°C, and the time is 17s; the fourth stage heating temperature is 740°C, and the time is 31s;

[0019] b. After the heated raw material round bar is cooled to room temperature, put it into the punch press and forge it into the required flange shape;

[0020] c. Then put it into a friction press, and cold-extrude it on the mold to the basic size of the flange; and then undergo solution heat treatment to form a flange blank.

Embodiment 3

[0022] A novel flange forging production process, the production process of the flange forging comprises the following steps:

[0023] a. After the raw material round bar is cut, it enters the electric furnace for heating, and adopts a four-stage heating method. The heating temperature of the first stage is 815°C, and the time is 14s; the heating temperature of the second stage is 945°C, and the time is 27s; the third stage The heating temperature of the stage is 850°C, and the time is 16s; the heating temperature of the fourth stage is 730°C, and the time is 30s;

[0024] b. After the heated raw material round bar is cooled to room temperature, put it into the punch press and forge it into the required flange shape;

[0025] c. Then put it into the friction press, cold extrusion molding on the mold to the basic size of the flange; and then undergo solution heat treatment to form a flange blank

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Abstract

The invention discloses a novel flange forging stock production process. The novel flange forging stock production process comprises following steps that a, a raw material round bar is discharged andenters an electric furnace to be heated, a four-stage type heating method is adopted, the first-stage heating temperature ranges from 800 DEG C to 825 DEG C, and the time ranges from 12 s to 15 s; thesecond-stage heating temperature ranges from 930 DEG C to 960 DEG C, and time ranges from 25 s to 28 s; the third-stage heating temperature ranges from 840 DEG C to 860 DEG C, and time ranges from 15s to 17 s; fourth-stage heating temperature ranges from 720 DEG C to 740 DEG C, and time ranges from 28 s to 31 s. In the flange forging stock stage, the raw material round bar is subject to repeatedheating and cooling treatment, the surface and the inner property of the raw material round bar are uniform, the subsequent extrusion forming is more stable, through repeated solid solution heat treatment, the grain structure of the forging stock is uniform, low in hardness, good in toughness, high in yield strength and resistant in tension, the percentage elongation reaches the need, the flangeforging stock efficiency is improved by 300%, and zero losses of the material are achieved.

Description

technical field [0001] The invention relates to the technical field of flanges, in particular to a novel flange forging billet production process. Background technique [0002] Flanges are important pipe connections and are widely used. At present, in the manufacturing process of the flange, it is usually directly machined (lathe processing, milling machine processing, etc.) Very serious, accounting for 40%-50%. Due to long-term deep processing, the residual stress of the product is high, and the hardness of the material is high, which directly affects the mechanical properties and performance of the material. [0003] In the flange production process, the flange raw material forging step is required, and the current flange forging process needs to be heated at different temperatures for quenching, and in the flange forging process It is necessary to effectively control the temperature and the flange forging time. Therefore, we propose a new flange forging production proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00C21D8/00
CPCB21J5/002C21D8/00
Inventor 张小林
Owner 安徽铜陵丰林法兰制造有限公司
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