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Forming die and forming method of a cone-shaped forging

A technology for forming dies and forgings, which is applied to the forming dies of conical cylindrical forgings and its forming field, can solve the problems of unsatisfactory, low impact toughness, large forging allowance, etc., and achieves improved material utilization, reduced material consumption, The effect of improving the performance of forgings

Inactive Publication Date: 2015-08-26
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is extremely difficult to form this kind of conical cylindrical forging with high height, and the amount of deformation is not easy to control
Usually this kind of forging is designed as a circular forging with a rectangular cross-section, but in the first batch of production, the plasticity and impact toughness of the body of the forging with this design method after quenching and tempering are very low, which cannot meet the requirements of the standard, and The forging allowance is large, and the material waste is serious; in the subsequent production, the process method of forging in three stages and finally welding is adopted. Although this method reduces material waste to a certain extent, there are serious problems in the actual production process. Technical problem: The weld seam is cast structure, its impact toughness is low, and the phenomenon of weld seam cracking is very easy to occur

Method used

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  • Forming die and forming method of a cone-shaped forging
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  • Forming die and forming method of a cone-shaped forging

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Embodiment Construction

[0027] Such as Figure 2-5 As shown, a forming die for a conical cylindrical forging includes a punch and a drain plate 4, the punch is composed of a first punch 1, a second punch 2 and a third punch 3, and the drain plate 4 There are through holes 5 corresponding to the punches; the taper of the first punch 1, the second punch 2 and the third punch 3 gradually increases.

[0028] The taper of the first punch 1 is 7°, the taper of the second punch 2 is 18°, and the taper of the third punch 3 is 28°.

[0029] The forming method of the described tapered cylindrical forging, comprises the steps:

[0030] Step 1: Upsetting

[0031] The raw material is made of 1Cr17Ni2 stainless steel Ф250mm large-size bar. The bar is heated to 1150-1180°C and then kept warm, and then put into the through hole 5 of the drain plate 4 and upset to a height of 330±10mm;

[0032] Step 2: Press the nest

[0033] Put the hot state blank processed in step 1 into the through hole 5 of the drain plate 4...

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Abstract

The invention discloses a forming die for conic forgings and a forming method thereof, and belongs to the technical field of metallurgical system forging. The forming die and the forming method have the advantages of reducing forging allowance, reducing material consumption and improving forging performance. The forming die comprises a punch and a drain cap, wherein the punch consists of a first punch, a second punch and a third punch; the drain cap is provided with a through hole corresponding to the punch; and the tapers of the first punch, the second punch and the third punch are gradually increased. The forming method comprises the following steps: upsetting, indenting, primarily reaming, secondarily reaming, punching and shaping.

Description

technical field [0001] The invention belongs to the technical field of metallurgical system forging, in particular to a forming die for a cone-shaped forging and a forming method thereof. Background technique [0002] The front cone wall part of a gas turbine is approximately cone-shaped. The maximum outer diameter of the part is Ф536mm, the minimum internal diameter is Ф205mm, and the height is 357mm. The cross-sectional shape of the forging is as follows figure 1 shown. It is extremely difficult to form this kind of conical cylindrical forging with high height, and the amount of deformation is not easy to control. Usually this kind of forging is designed as a circular forging with a rectangular cross-section, but in the first batch of production, the plasticity and impact toughness of the body of the forging with this design method after quenching and tempering are very low, which cannot meet the requirements of the standard, and The forging allowance is large, and the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J13/02B21K3/00
Inventor 李国辉陈晓峰刘信祖邰清安臧德昌
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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