Method for thermally bulging aluminium alloy rectangular ring rolled piece

A rectangular ring and thermal expansion technology is applied in the field of thermal expansion of aluminum alloy rectangular ring rolling pieces, which can solve the problems of low dimensional accuracy of ring rolling pieces and achieve the effect of improving dimensional accuracy.

Active Publication Date: 2012-06-13
GUIZHOU ANDA AVIATION FORGING
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Problems solved by technology

However, this method does not disclose in detail how to improve the dimensional accuracy of the ring through bulging, but only generally concludes that the purpose of improving th

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  • Method for thermally bulging aluminium alloy rectangular ring rolled piece
  • Method for thermally bulging aluminium alloy rectangular ring rolled piece
  • Method for thermally bulging aluminium alloy rectangular ring rolled piece

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[0042] The main chemical element content (weight percentage) of the alloy is: Si content 0.15% ~ 0.25%, Fe content 0.9% ~ 1.4%, Cu content 1.8% ~ 2.7%, Mn content ≤ 0.25%, Mg content 1.2% to 1.8%, Ni content 0.8% to 1.4%, Zn content ≤0.15%, Ti+Zr content ≤0.25%, Ti content ≤0.20%, total other elements ≤0.15%, and the balance is Al.

[0043] The structure diagram of the bulging machine used to implement the thermal bulging method of the present invention is as follows figure 2 As shown, the bulging machine is mainly composed of mandrel slider 1, radial slider 2, bulging block 3, worktable 4 and guide rail 5. The mandrel slider 1 is conical and is sleeved in the radial slider 2 to fit with the tapered inner circumferential surface of the radial slider 2. The mandrel slider 1 can be driven on the radial slider 2 by the hydraulic cylinder of the bulging machine. The inner part moves up and down in the axial direction and squeezes the radial slider 2; the radial slider 2 is installed...

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Abstract

The invention discloses a method for thermally bulging an aluminium alloy rectangular ring rolled piece. The method comprises the following steps: sleeving a hot rolled aluminium alloy rectangular ring rolled piece on the peripheries of preheated bulging blocks in a bulging machine and starting the bulging machine to ensure the bulging blocks to radially extrude the ring rolled piece from the inner circumferential surface of the ring rolled piece to complete first bulging, wherein the bulging temperature is 330-400 DEG C, the bulging time is 15-20 seconds, the dwell time is 12-14 seconds and the deformation amount is 0.5-0.9%; then ensuring the ring rolled piece to rotate 45 degrees along a central axis to complete first rotation; later, carrying out second bulging according to the above operations, wherein the bulging temperature is 290-350 DEG, the bulging time is 18-30 seconds, the dwell time is 13-16 seconds and the deformation amount is 0.6-1%; rotating the ring rolled piece again in the first rotation direction to complete second rotation; and then carrying out third bulging according to the above operations, wherein the bulging temperature is 250-320 DEG C, the bulging time is 25-35 seconds, the dwell time is 20-23 seconds and the deformation amount is 0.6-1.1%. The dimensional accuracy of the bulged ring rolled piece can be 1-2 per mill of the corresponding dimension. The method is mainly used in the fields such as aerospace.

Description

Technical field [0001] The invention relates to a bulging method of ring parts, in particular to a thermal bulging method of aluminum alloy rectangular ring rolling parts. Background technique [0002] After aluminum alloy rectangular ring-rolled parts (referring to ring-rolled parts with rectangular cross-sections in longitudinal section) are rolled by a ring rolling mill, due to the limitations of the rolling process and equipment, the dimensional accuracy is generally not high; only in the shape of the ring-rolled parts Under the condition of ideal and excellent equipment performance, its dimensional accuracy can reach 3‰~5‰ (three thousandths to five thousandths) of the corresponding size, and the ring-rolled parts after rolling have relatively high stress. If it is not well controlled in the subsequent processing procedures, defects such as warpage, deformation or even cracking will occur. [0003] The Chinese invention patent specification CN 101367104A published on February...

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Application Information

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IPC IPC(8): B21D31/00
Inventor 叶俊青张衡刘峰易文燕俞隽李本江周子文
Owner GUIZHOU ANDA AVIATION FORGING
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