Processing method of titanium alloy double-curvature rotary drum

A technology of a rotating cylinder and a processing method, which is applied in the field of metal forming processing to achieve the effects of small springback, elimination of residual stress, and guarantee of dimensional accuracy and product consistency

Active Publication Date: 2014-01-29
BEIJING HANGTIAN XINFENG MECHANICAL EQUIP
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for processing a titanium alloy double-curvature

Method used

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  • Processing method of titanium alloy double-curvature rotary drum
  • Processing method of titanium alloy double-curvature rotary drum
  • Processing method of titanium alloy double-curvature rotary drum

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Embodiment Construction

[0021] see figure 2 , shown in Fig. 3, the processing method of titanium alloy hyperbolic rotating cylinder of preferred embodiment of the present invention, comprises the following steps:

[0022] (1) For blanking, expand the cone into a fan shape; the arc length of the fan shape is negative work difference.

[0023] (2) Rolling and welding into a cone;

[0024] (3) Cold bulging. Under normal temperature conditions, cold bulging is carried out with expansion petal cold bulging tires, and the deformation is controlled to be less than 2.5%, that is, the diameter of the maximum deformation is expanded from 440mm to 450mm;

[0025] (4) Recrystallization annealing, 550 ℃, heat preservation for half an hour, cooling with the furnace;

[0026] (5) Thermal expansion. Under the condition of 720°C, thermal expansion is carried out with the expansion petal type thermal expansion tire, and the deformation is controlled to be less than 2.5%, that is, the diameter of the maximum deforma...

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Abstract

The invention belongs to the field of metal forming and processing and in particular relates to a processing method of a titanium alloy double-curvature rotary drum. The method comprises the following steps of (1) feeding materials; (2) rolling the materials and forming a conical drum through welding; (3) performing cold bulging and controlling the deformation quantity to be less than 25%; (4) performing recrystalization annealing; (5) performing hot bulging under the condition of 720 DEG C and controlling the deformation quantity to be less than 2.5%; (6) performing internal stress relaxed shaping to eliminate residual stress. The processing method of the titanium alloy double-curvature rotary drum ensures the maximum deformation rate to be approximate to and less than 6% to guarantee the strength of the titanium alloy double-curvature rotary drum and eliminates the residual stress after bulging as well as under stress removal temperature and time conditions to guarantee the dimensional accuracy of the titanium alloy double-curvature rotary drum and the uniformity of products.

Description

technical field [0001] The invention belongs to the field of metal forming processing, and in particular relates to a processing method for a titanium alloy double-curvature rotary cylinder. Background technique [0002] Titanium alloy double-curvature rotary cylinder is a thin-walled drum-shaped cylinder with open ends and a bulging middle (such as figure 1 shown), the radius of cylinder 1 is a cubic function of the coordinates of the rotary axis, r=A×{1-(1-X / B) 3}, where X is the coordinate of the rotary axis, A is the radius of the big end of cylinder 1, and B is a constant. The drum-shaped cylinder cannot be formed by turning because of its thin wall and large volume, so the method of forming a drum-shaped cone after welding thin plates into a cone can only be used. However, cracks are prone to appear during the bulging process, especially at the weld position. In addition, the deformation rate of the bulging part also needs to be considered. According to the strength...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB21D39/08B23P15/00
Inventor 黄景雨胡鑫张舜徐东宏吕宝瑜董时鑫李波
Owner BEIJING HANGTIAN XINFENG MECHANICAL EQUIP
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