Composite forming die and method for titanium alloy deep-cavity component
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A forming die and composite forming technology, applied in forming tools, manufacturing tools, metal processing equipment, etc., can solve problems such as wrinkling and cracking, poor forming accuracy, and many forming passes, so as to reduce the resistance of moving deformation and improve the wall thickness. Thickness uniformity, effect of reducing wall thickness reduction rate
Active Publication Date: 2020-10-30
BEIJING HANGXING MACHINERY MFG CO LTD
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[0004] The purpose of the present invention is to solve the problem of wrinkling and cracking, many forming passes, high cost and poor forming accuracy of deep cavity components during single deep drawing, and the serious reduction of wall thickness at local positions during single superplastic forming. In view of the disadvantages of large amount of addition, a composite forming die and forming method for titanium alloy
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Embodiment 1
[0072] Taking TA15 titanium alloy hemispherical deep-drawing parts as an example, its dimensions are shown in image 3 , the component thickness is 4mm, and the total height is 320mm.
[0073] The specific forming process is carried out as follows:
[0074] Step (1) Determine the size of the blank: select the 7mm thick TA15 titanium alloy raw material plate required for forming, and supplement the margin and process flange edge according to the characteristics of the component (such as figure 1 Shown), unfold and confirm that the blanking size is 7×Φ900mm.
[0075] Step (2) Designing the forming mold: designing and manufacturing the required molds for thermal deep drawing forming and superplastic forming, appropriately reducing the cavity of the superplastic forming mold according to the size of the titanium alloy hemispherical component, and selecting the scaling factor as 8‰.
[0076] Step (3) Forming preparation: Only the flange position of the drawing upper die and blank...
Embodiment 2
[0081] Taking TC4 titanium alloy hemispherical deep-drawing parts as an example, its dimensions are shown in image 3 , the component thickness is 3mm, and the total height is 270mm.
[0082] The specific forming process is carried out as follows:
[0083] Step (1) Determine the size of the blank: select the 6mm thick TC4 titanium alloy raw material plate required for forming, and supplement the margin and process flange edge according to the characteristics of the component (such as figure 1 Shown), expand to determine the blanking size is 6 × Φ800mm.
[0084] Step (2) Designing the forming mold: designing and manufacturing the required molds for thermal deep drawing forming and superplastic forming, appropriately reducing the cavity of the superplastic forming mold according to the size of the titanium alloy hemispherical component, and selecting the scaling factor as 8‰.
[0085]Step (3) Forming preparation: Only the flange position of the drawing upper die and blank hold...
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Abstract
The invention provides a composite forming die and method for a titanium alloy deep-cavity component. The forming method includes the following steps that a hot-drawing forming die and a superplasticforming die are designed and machined according to the titanium alloy deep-cavity component, and the size of a round blank is determined; the hot-drawing forming die is mounted and positioned on a forming machine; aqueous graphite is sprayed to the flange position where an upper drawing die and a blank holder make contact with each other and the position where the round blank and a flange make contact with each other; differential heating of the hot-drawing forming die and preheating of the round blank are performed; die closing and drawing are performed on the hot-drawing forming die, and a preform is obtained; and the preform is placed in the superplastic forming die, and superplastic forming of deep-cavity component is performed. According to the composite forming die and method, through optimized design of the forming die and technological parameters, in combination with the unique technological process, precise forming of the titanium alloy specially-shaped deep-cavity component is realized, so that existing deep-cavity component forming technology bottlenecks are broken through, the defects of wrinkling and cracking are eliminated, the wall thickness uniformity is optimized,the product quality and yield are effectively increased, and the manufacturing and application requirements for specially-shaped components are met.
Description
technical field [0001] The invention belongs to the technical field of processing titanium alloy deep cavity components, and in particular relates to a composite forming die and a forming method for titanium alloy deep cavity components. Background technique [0002] Titanium alloy has excellent physical and mechanical properties such as small specific gravity, high specific strength, corrosion resistance and high temperature resistance, and is widely used in aerospace, ships, biomedical, petrochemical and other fields. Among them, box-shaped, spherical, conical, curved surface parts and other titanium alloy special-shaped deep-cavity components with complex shapes, large cross-section changes, high precision, and large cavity depths are more difficult to form. With the improvement of structural and functional integration requirements, Higher requirements are also put forward for the manufacturing process of such titanium alloy components. [0003] The plasticity of titaniu...
Claims
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