Titanium alloy volute casing piece forming method

A forming method and a technology of volute parts, which are applied in the field of processing plate-made metal heterogeneous parts, can solve problems such as processing technology gaps, and achieve the effect of large springback

Inactive Publication Date: 2010-07-21
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

Previously, such components were imported from abroad in the form of finished products. There is no research and processing report on this product in China, and its processing technology is still blank.

Method used

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  • Titanium alloy volute casing piece forming method
  • Titanium alloy volute casing piece forming method
  • Titanium alloy volute casing piece forming method

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Embodiment 1

[0045] The invention has been used in the industrialized small-batch production of a certain type of titanium alloy volute for aircraft engines, and the quality, various shapes, sizes, performances, structures, etc. of the volute meet the requirements of design and use.

[0046] (1) Billet calculation: according to figure 1 As shown in a certain type of titanium alloy volute, the product design thickness is 2mm, choose 2mm TC4 thin plate as the blank, and then bring the corresponding parameters at different angles α of the volute into formulas 1 and 2 to calculate the outer circle and inner circle of the blank respectively. circle size. Billet diagram see Figure 6 .

[0047] Formula 1: R α =R α1 +π / 4D α +Δ

[0048] Formula 2: r α =R α1 -π / 4D α -Δ

[0049] R α ——Outer radius at angle α of billet; unit: mm

[0050] R α1 ——Central radius at angle α of the volute itself; mm

[0051] D. α ——the cross-sectional diameter of the volute itself at angle α; mm

[0052] r ...

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Abstract

The invention relates to a plate metal special-shaped piece processing method, in particular to a titanium alloy volute casing piece forming method, which comprises the following steps that: the size of an outer circle and an inner circle of a preform body is calculated according to a design drawing of a volute casing piece; the material is fed; the size of mould cavity is reduced by 3 to 7 percent when designing a mould, the processing method adopts a numeric-control processing center to process, and the hardness of the mould is more than or equal to HRC45; the formation is carried out in a multi-pass hot-drawing way; and finally the metal volute casing piece is obtained through the mechanical processing and the surface treatment. The titanium alloy volute casing piece is processed through the multi-pass hot-drawing formation technology; the high-temperature-resistant anti-oxidation coat is used for coating the surface of a titanium alloy sheet so as to realize that the titanium material can be heated inside an ordinary resistance furnace; the size reduction range of the mould cavity is found when designing the mould; technological seams are arranged on local part of the preform body so as to prevent local part from being cracked during the formation process; and the industrialized small mass production of the titanium alloy volute casing piece is realized, the quality of the product reaches the level of the similar product in overseas developed countries, and the urgent need of the aviation industry is solved.

Description

technical field [0001] The invention relates to a processing method for plate-made metal heterogeneous parts, in particular to a forming method for titanium alloy volute parts. Background technique [0002] Titanium alloy has low density, high strength, high yield ratio, especially excellent corrosion resistance, and is widely used in aviation, aerospace, shipbuilding and other fields. However, titanium alloys, especially duplex titanium alloys such as TC4, have higher strength, higher yield ratio, and smaller elastic modulus, which are only half of stainless steel, which makes them suitable for forming complex sections such as spiral shells. The technical difficulty of the component is relatively large. The traditional molding process of this type of titanium alloy volute is casting. However, in the field of aviation and aerospace, the weight of the component is strictly controlled, and the casting is heavy due to the thick wall thickness. It is not suitable to use, so the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21D22/26
Inventor 张永强万自永赵国超
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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