Aluminum alloy complex disc part isothermal precision forging process method

A disc-like parts, precision forging technology, applied in the field of warm forging technology, can solve the problems of streamline disorder, eddy current and through-flow, etc., and achieve the effect of improving streamline, uniform and fine grain size, and uniform distribution of internal structure

Inactive Publication Date: 2009-10-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of streamline disorder, eddy current and flow-through existin

Method used

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  • Aluminum alloy complex disc part isothermal precision forging process method

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specific Embodiment approach 1

[0017] Specific implementation mode 1: The steps of a pressure control method for viscoelastic-plastic soft mold forming of an aluminum alloy cover part in this embodiment are as follows: the steps of an isothermal precision forging process for complex aluminum alloy disc parts are:

[0018] Step 1: determining the size of the original fine-grained blank;

[0019] Step 2: Preheating the forging die and the original fine-grained billet: heating the original fine-grained billet to 430±5°C in air, while installing the forging die on the forging press, and heating the forging die to 430±5°C;

[0020] Step 3: The first isothermal die forging forming: Spray the lubricant on the surface of the forging die, and then put the billet heated to the forging temperature into the forging die on the forging press, and use the heating device of the forging die to continue to heat the billet and the forging die Heating, keeping the forging die and the billet within the forging temperature range...

specific Embodiment approach 2

[0029] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the forging pressure provided by the forging press in step 3, step 6 and step 9 of this embodiment is 10000KN~30000KN. The strain rate of the sub-preliminary discs is 9×10 -4 ~1.2×10 -4 . The forming effect is good.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the deformation amount of the first isothermal die forging in step three of this embodiment, the deformation amount of the second isothermal die forging in step six and The deformation amount of the third isothermal die forging in step nine is 30%-60%. More effectively prevent forging folding, eddy current and flow through.

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Abstract

The invention discloses an aluminum alloy complex disc part isothermal precision forging process method, and relates to an aluminum alloy disc part isothermal forging die. The invention solves the problems of streamline turbulence, vortex and percolation of the prior complex disc parts. The process method comprises the following main steps: determining the size of primary fine grain blank; preheating the forging die and the primary fine grain blank; primarily forging isothermal die; performing acid cleaning and mill flashing on primary disc parts; heating the forging die and the primary disc parts; secondarily forging isothermal die; performing acid cleaning, mill flashing and trimming on secondary primary disc parts; heating the forging die and the secondary primary disc parts; tertiarily forging isothermal die; and performing acid cleaning and flash trimming on complex disc parts and performing shape correction. The process method effectively improves the streamlines of forgings, avoids the generation of streamline turbulence, folding, vortex and percolation, streamlines of the formed complex disc parts are distributed along the geometric shapes of the parts, the internals are evenly distributed, and the grain size is even and fine.

Description

technical field [0001] The invention relates to an isothermal forging process for aluminum alloy disc parts, in particular to an isothermal precision forging process for complex aluminum alloy disc parts. Background technique [0002] Based on the advantages of low density, high strength and good processing performance, aluminum alloy has always been one of the most widely used metal structural materials in the aerospace field. Aluminum alloy complex disk parts, such as the moving disk and the fixed disk under the wing of a helicopter, are a pair of key force-bearing parts that cooperate with each other to adjust the flight attitude, and require high internal metallurgical quality, uniform and fine grain size, and require The streamline of the forging is distributed along the geometric shape of the part, and the phenomenon of streamline disorder, eddy current and flow-through is not allowed. Due to the complex shape, high technical requirements and difficulty in forging, or...

Claims

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Application Information

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IPC IPC(8): B21K1/32B21J13/02
Inventor 徐福昌单德彬徐文臣吕炎
Owner HARBIN INST OF TECH
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