Hot bulging method for forming rectangular titanium alloy rolled ring into special-shaped ring

Abstract

The invention discloses a hot bulging method for forming a rectangular titanium alloy rolled ring into a special-shaped ring; the hot bulging method comprises the following steps of: sleeving a heated rectangular titanium alloy rolled ring at the periphery of a preheated bulging block of a bulging machine, starting the bulging machine so that the bulging block extrudes the rolled ring along the radial direction on the surface of the inner circumference of the rolled ring till the deformation amount of the rolled ring is 10%-12%, and the rolled ring is formed into a special-shaped ring blank, thereby completing primary bulging, and then leading the special-shaped ring blank to rotate by 45 degrees along a central axis to complete primary rotation; and afterwards, according to the operation, carrying out secondary bulging with 0.9%-1.5% of deformation amount and secondary rotation, third bulging with 0.9%-1.5% of deformation amount and third rotation, and fourth bulging with 0.5%-1% of deformation amount on the special-shaped ring blank, thereby obtaining the special-shaped ring. The dimensional accuracy of the special-shaped ring can reach 0.1%-0.2% of the corresponding dimension; and the special-shaped ring is mainly applied to the fields of aerospace and the like.

Description

technical field

[0001] The invention relates to a method for bulging a ring, in particular to a method for thermally expanding a rectangular rolled titanium alloy ring into a special-shaped ring. Background technique

[0002] Titanium alloy rectangular ring-rolled pieces (referring to the ring-rolled pieces with a rectangular longitudinal section) or special-shaped ring-rolled pieces (referring to the ring-rolled pieces with a non-rectangular 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 when the shape of the ring-rolled piece is ideal and the equipment performance is excellent, the dimensional accuracy can reach 3‰~5‰ of the corresponding size (three thousandths to one thousandths) 5), and because of the high stress of the rolled ring-rolled piece, defects such as warping, deformation or even cracking may easily occur if the control is not good in the ...

Examples

specific Embodiment approach

[0045] The main chemical element content (percentage by weight) of the alloy is: Al content 5.50-6.80%, V content 3.50-4.50%, Fe content ≤ 0.30%, C content ≤ 0.10%, N content ≤ 0.05%, H content ≤ 0.015%, O content ≤ 0.20%, the total of other elements ≤ 0.30, the balance is Ti.

[0046] The structural diagram of the bulging machine for implementing the thermal bulging method of the present invention is as follows: figure 2 As shown, the bulging machine is mainly composed of a mandrel slider 1, a radial slider 2, a bulging block 3, a workbench 4 and a guide rail 5. The mandrel slider 1 is conical and is set in the radial slider 2 to cooperate with the conical inner peripheral surface of the radial slider 2. The mandrel slider 1 can be driven by the hydraulic cylinder of the bulging machine on the radial slider 2. Move up and down in the axial direction and squeeze the radial slider 2; the radial slider 2 is installed on the guide rail 5 of the bulging machine and can move back...

technical field

[0001] The invention relates to a method for bulging a ring, in particular to a method for thermally expanding a rectangular rolled titanium alloy ring into a special-shaped ring. Background technique

[0002] Titanium alloy rectangular ring-rolled pieces (referring to the ring-rolled pieces with a rectangular longitudinal section) or special-shaped ring-rolled pieces (referring to the ring-rolled pieces with a non-rectangular 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 when the shape of the ring-rolled piece is ideal and the equipment performance is excellent, the dimensional accuracy can reach 3‰~5‰ of the corresponding size (three thousandths to one thousandths) 5), and because of the high stress of the rolled ring-rolled piece, defects such as warping, deformation or even cracking may easily occur if the control is not good in the ...

Examples

specific Embodiment approach

[0045] The main chemical element content (percentage by weight) of the alloy is: Al content 5.50-6.80%, V content 3.50-4.50%, Fe content ≤ 0.30%, C content ≤ 0.10%, N content ≤ 0.05%, H content ≤ 0.015%, O content ≤ 0.20%, the total of other elements ≤ 0.30, the balance is Ti.

[0046] The structural diagram of the bulging machine for implementing the thermal bulging method of the present invention is as follows: figure 2 As shown, the bulging machine is mainly composed of a mandrel slider 1, a radial slider 2, a bulging block 3, a workbench 4 and a guide rail 5. The mandrel slider 1 is conical and is set in the radial slider 2 to cooperate with the conical inner peripheral surface of the radial slider 2. The mandrel slider 1 can be driven by the hydraulic cylinder of the bulging machine on the radial slider 2. Move up and down in the axial direction and squeeze the radial slider 2; the radial slider 2 is installed on the guide rail 5 of the bulging machine and can move back...

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