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Forging process of inner straight hole part

A process, straight hole technology, applied in the field of forging, can solve the problems of decreased production efficiency, affected inner surface strength of the hole, increased production cost, etc., to achieve the effect of improving accuracy, avoiding disordered flow, and reducing machining cost.

Active Publication Date: 2021-03-30
JIANGSU BAOJIE FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the traditional forging process is used to forge inner straight hole parts, there is inevitably a continuous skin in the middle, and the inner straight hole parts need to be obtained through subsequent machining, resulting in a decrease in production efficiency and an increase in production costs, and also affects the strength of the inner surface of the hole

Method used

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  • Forging process of inner straight hole part

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Experimental program
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Effect test

Embodiment 1

[0025] A forging process for inner straight hole parts, comprising the following steps:

[0026] (S1) Accurately weigh the metal blank, heat it at a heating rate of 170 °C / h to 1105 °C and roll it into a ring shape, then heat it again at a heating rate of 130 °C / h to 1180 °C and hold it for 120 minutes.

[0027] (S2) Put the reheated annular metal blank obtained in step (S1) into a forging die preheated to 295° C. for forging; wherein, the forging die includes a forming lower die, a forming upper die and a punch; forming The center of the lower die is provided with a counterbore that can accommodate the punch, and the center of the forming upper die is provided with a vertical pipe hole for the punch to pass through; when forging, the ring-shaped metal blank is placed horizontally on the forming lower die, and the punch first falls into the The counterbore occupies the central position, and then the forming upper die falls to forge the ring-shaped metal blank; after the forgin...

Embodiment 2

[0040] A forging process for inner straight hole parts, comprising the following steps:

[0041] (S1) Accurately weigh the metal blank, heat it at a heating rate of 160 °C / h to 1080 °C and roll it into a ring shape, then heat it again at a heating rate of 120 °C / h to 1170 °C and keep it for 60 minutes.

[0042] (S2) Put the twice-heated annular metal blank obtained in step (S1) into a forging die preheated to 290°C for forging; wherein, the forging die includes a forming lower die, a forming upper die and a punch; forming The center of the lower die is provided with a counterbore that can accommodate the punch, and the center of the forming upper die is provided with a vertical pipe hole for the punch to pass through; when forging, the ring-shaped metal blank is placed horizontally on the forming lower die, and the punch first falls into the The counterbore occupies the central position, and then the forming upper die falls to forge the ring-shaped metal blank; after the forgi...

Embodiment 3

[0055] A forging process for inner straight hole parts, comprising the following steps:

[0056] (S1) Accurately weigh the metal blank, heat it at a heating rate of 180 °C / h to 1120 °C and roll it into a ring shape, then heat it again at a heating rate of 130 °C / h to 1190 °C and hold it for 180 min.

[0057] (S2) Put the reheated annular metal blank obtained in step (S1) into a forging die preheated to 320° C. for forging; wherein, the forging die includes a forming lower die, a forming upper die and a punch; forming The center of the lower die is provided with a counterbore that can accommodate the punch, and the center of the forming upper die is provided with a vertical pipe hole for the punch to pass through; when forging, the ring-shaped metal blank is placed horizontally on the forming lower die, and the punch first falls into the The counterbore occupies the central position, and then the forming upper die falls to forge the ring-shaped metal blank; after the forging is...

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Abstract

The invention belongs to the technical field of forging, and particularly relates to a forging process of an inner straight hole part. The forging process comprises the following steps: accurately weighing a metal blank, heating and grinding the metal blank into a ring shape, carrying out secondary heating, and carrying out heat preservation. The annular metal blank is put into a preheated forgingdie to be forged; the forging die comprises a lower forming die, an upper forming die and a punch; a counter bore just accommodating the punch is formed in the center of the lower forming die, and avertical pipe through hole allowing the punch to penetrate through is formed in the center of the upper forming die; during forging, the annular metal blank is horizontally arranged on the lower forming die, the punch falls into the center occupied by the counter bore firstly, and then the upper forming die falls down to forge the annular metal blank; and after forging is completed, the punch is lifted firstly, then the forming upper die is lifted, and the workpiece is taken out. According to the forging process, the inner straight hole forge piece with the regular inner wall can be directly forged, and the bulk phase and the surface of the forge piece have excellent mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a forging process of inner straight hole parts. Background technique [0002] Forgings refer to workpieces or blanks obtained by forging and deforming metal blanks. Forgings are widely used because of their excellent mechanical properties. However, when the traditional forging process is used to forge inner straight hole parts, there is inevitably a continuous skin in the middle, and the inner straight hole parts need to be obtained through subsequent machining, resulting in a decrease in production efficiency and an increase in production costs, and also affects the strength of the inner surface of the hole . In addition, developing a reasonable forging process to improve the mechanical properties of forgings is also an important research direction in metal processing. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the present in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02B21J1/04B21J13/02B21J1/06C22C38/02C22C38/04C22C38/44
CPCB21J1/04B21J1/06B21J5/02B21J13/02C22C38/001C22C38/02C22C38/04C22C38/44
Inventor 陆以春王正国陈波
Owner JIANGSU BAOJIE FORGING
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