A kind of isothermal die forging forming control method for radial rib shell forgings

A technology of isothermal die forging and control method, which is applied to the driving device of the forging press, etc., can solve the problems of complex metal flow, failure to meet the requirements of rib shape and dimension accuracy, and flow line disorder, so as to avoid long-distance uncontrollable metal The effect of flow, good internal tissue performance and high dimensional accuracy

Active Publication Date: 2020-05-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex flow of metal, in addition to obvious folds, many hidden small folds are often found in the fluorescent inspection, and these fold defects will cause forgings to fail to meet the requirements
The long-distance uncontrollable flow of metal leads to the disorder of the streamline at the connection between the rib and the web. As a result, the shape and dimension accuracy requirements of the rib are not met, and the mechanical properties are reduced, making it difficult to use as a key load-bearing component.

Method used

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  • A kind of isothermal die forging forming control method for radial rib shell forgings
  • A kind of isothermal die forging forming control method for radial rib shell forgings
  • A kind of isothermal die forging forming control method for radial rib shell forgings

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Experimental program
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Effect test

Embodiment 1

[0045] 1. Prepare the original billet: Preliminarily inspect the original extruded bar, cut it with a sawing machine, remove the coarse crystal ring of the outer skin, and obtain a bar of Φ235mm×60mm;

[0046] 2. Upsetting billet: heat the Φ235mm×60mm bar to 420°C for 90 minutes, heat the mold flat anvil to 400°C-450°C, and upsetting to Figure 7 The cake base of Φ320mm×30mm shown;

[0047] 3. The first pre-forging: use Figure 8 Shown on the upper die 1 and Figure 9 The final forging die formed by the lower die 2 shown in the figure forms the 2A12 (LY12) cake base obtained by upsetting with a size of Φ320mm×30mm, heats the blank, the upper die 1 and the lower die 2, and the upper die 1 and the lower die 2 The temperature range is 400°C-450°C, and the billet temperature is about 410°C-430°C;

[0048] The upper die 1 is pressed down at a speed of 12.8mm / s until there is 6-8mm remaining between the upper die 1 and the lower die 2. At this time, the tonnage is 2200 tons, and ...

Embodiment 2

[0052] 1. Prepare the original billet: Preliminarily inspect the original extruded bar, cut it with a sawing machine, remove the coarse crystal ring of the outer skin, and obtain a bar of Φ235mm×60mm;

[0053] Two, upsetting billet: the The bar material is heated to 420°C for 90 minutes, the flat anvil die is heated to 425°C, and upsetting to Figure 7 The cake base of Φ320mm×30mm shown;

[0054] 3. The first pre-forging: use Figure 8 Shown on the upper die 1 and Figure 9 The size of the final forging die formed by the shown lower die 2 to upsetting is The 2A12 (LY12) cake blank is formed, and the blank and the upper mold 1 and the lower mold 2 are heated. The temperature range of the upper mold 1 and the lower mold 2 is 425 ° C, and the blank temperature is 420 ° C;

[0055] The upper die 1 is pressed down at a speed of 12.8mm / s until there is 7mm left between the upper die 1 and the lower die 2. At this time, the tonnage is 2200 tons, and the first pre-forging is obt...

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Abstract

The invention discloses an isothermal die forging forming control method for a radial rib shell forge piece, and relates to a shell forge piece forming control method. The method comprises the following steps that 1, original blank materials are prepared; 2, upsetting is carried out to prepare a blank; 3, pre-forging is carried out for the first time; 4, pre-forging is carried out for the second time; and 5, final forging is carried out. According to the method, the blank is accurately prepared, the deformation degree is controlled, the deformation rate is controlled to enable the part, at therib part which is difficult to form, of a metal to partially flow, and the shape size and the size of a central recess hole are controlled, so that flowing and local deformation degree of the metal can be accurately controlled, the problems of folding, insufficient filling and streamline disorder are solved, and the forge piece can be stably manufactured in batches.

Description

technical field [0001] The invention relates to a method for controlling the forming of shell-like forgings, in particular to a method for controlling the isothermal die forging of radially ribbed shell-like forgings. Background technique [0002] Aluminum alloy radial rib shell components, as representative components, are widely used in the fields of aerospace, weapons and automobiles. Rib components are usually divided into grid ribs and radial ribs, both of which are difficult-to-form die forgings, and the ribs generally do not allow subsequent machining, which requires high forming precision for die forging. Ordinary die forging forming method is difficult to precisely forge radial ribs. Even if the radial ribs are barely formed, folding defects will be formed due to the convection and confluence flow of metal during the filling process. The long-distance uncontrollable flow of metal will lead to the connection of ribs and webs As a result, the shape and dimension accu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J9/20
CPCB21J9/20
Inventor 袁林徐福昌梁伟康汪锐单德彬郭斌
Owner HARBIN INST OF TECH
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