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Thin-wall aluminum alloy material tube-shell part cutting processing heat treatment process

A high-temperature heat treatment technology for aluminum alloy materials, applied in the field of heat treatment process for cutting and processing thin-walled aluminum alloy material shell parts, can solve the problems of high specific modulus, low density, high specific strength, etc., to improve cutting performance and stability Sex, the effect of eliminating processing deformation

Inactive Publication Date: 2014-12-24
无锡市森信精密机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aluminum alloy is a light alloy with low density, high specific strength, high specific modulus, excellent structural performance, good toughness and plasticity, and can be quenched. During aging treatment, it is suitable for thin wall of tube and shell parts, high dimensional accuracy and geometric tolerance. Requiring strict technical features, the present invention solves the problem of cutting deformation of thin-walled aluminum alloy tube and shell parts through multiple processing practices and adopts four-stage heat treatment process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The material of the tube and shell parts is super duralumin 7A04-T6, the length is 60mm, the outer circle size is 46mm, the dimension tolerance is 0.039mm, and the wall thickness is 2mm. The blank of the tube and shell parts is a forged bar and turned into shape.

[0028] Before quenching, super-hard aluminum material has low strength and hardness, and low plasticity. Under the action of high temperature and high pressure, it will cause sticking phenomenon and form built-up edge, which will accelerate the wear of the tool, and it is difficult to obtain a small surface roughness value in the annealed state. , so a quenching heat treatment is used in the blank to improve the cutting performance. For the initial processing, use a salt bath furnace at 400°C to heat for 0.5h, keep warm at 100°C, and use YG643 material blades. Due to the low temperature, the critical temperature for quenching super-hard aluminum materials cannot be reached, and the time is short, and the mater...

Embodiment 2

[0034] The material of the tube and shell parts is super duralumin 7A04-T6, the length is 60mm, the outer circle size is 46mm, the dimension tolerance is 0.039mm, and the wall thickness is 2mm. The blank of the tube and shell parts is a forged bar and turned into shape.

[0035] Quenching at a temperature of about 430°C for 45 minutes + aging solution heat treatment is used to eliminate the internal stress, uneven structure and coarse grains of super-duralumin materials, increase hardness, reduce toughness and plasticity, and improve super-duralumin materials. cutting performance. Also using the blade of YG643 material, practice has proved that the life of the tool has been increased from 50 minutes to 180 minutes, and the surface processing quality of the parts has been significantly improved.

[0036]After the rough machining of the part, due to the large machining allowance, the stress release of the part is the largest at this time, so a recrystallization aging heat treatm...

Embodiment 3

[0040] The material of the tube and shell parts is super duralumin 7A04-T6, the length is 60mm, the outer circle size is 46mm, the dimension tolerance is 0.039mm, and the wall thickness is 2mm. The blank of the tube and shell parts is a forged bar and turned into shape.

[0041] Quenching at a temperature of about 470°C for 45 minutes + aging solution heat treatment is used to eliminate the internal stress, uneven structure and coarse grains of super-duralumin materials, increase hardness, reduce toughness and plasticity, and improve super-duralumin materials. cutting performance. Also using the blade of YG643 material, practice has proved that the life of the tool has been increased from 50 minutes to 180 minutes, and the surface processing quality of the parts has been significantly improved.

[0042] After the rough machining of the part, due to the large machining allowance, the stress release of the part is the largest at this time, so a recrystallization aging heat treat...

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Abstract

The invention relates to a thin-wall aluminum alloy material tube-shell part cutting processing heat treatment process which comprises the following steps: carrying out quenching and aging solution treatment by adopting a blank; improving the cutting property of a material; relieving stress by adopting aging heat treatment after rough machining; carrying out semi-finishing, and then carrying out the aging heat treatment to further relieve machining stress so as to ensure the stress inside a machined part is completely released; after turning is completed, carrying out low-temperature heat treatment for stabilizing machining size for the last time. Practices indicate that the heat treatment process method can be used for achieving the purposes of eliminating the machining deformation of the part and stabilizing the machining size and ensuring that the size accuracy and form and location tolerance of the part meet the technical requirements.

Description

technical field [0001] The invention relates to a heat treatment process for cutting and processing thin-walled aluminum alloy material shell parts. Background technique [0002] In actual production, parts such as thin-walled aluminum alloy tubes and shells are often deformed during and after machining, and no effective solution can be found, causing the parts to be scrapped. [0003] Parts of thin-walled aluminum alloy shells have the following difficulties in machining: [0004] (1) The tissue is prone to fission at high temperature. Aluminum alloy material has low melting point, large activation energy, and greater plasticity when the temperature rises. Under high temperature and high pressure, it is easy to cause sticking phenomenon during cutting, forming built-up edge. [0005] (2) It is easy to deform during cutting. The blank of the tube and shell part is formed by bar material processing. To process it into a thin-walled tube shell with a wall thickness of only ...

Claims

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Application Information

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IPC IPC(8): C22F1/04C21D1/78
Inventor 华兆红
Owner 无锡市森信精密机械厂
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