Forming method for hollow thin-wall uniform-thickness titanium alloy sealing ring

Abstract

The invention discloses a forming method for a hollow thin-wall uniform-thickness titanium alloy sealing ring, and the forming method adopts a mould (1) and comprises a process method. According to the technical scheme adopted by the invention, polyurethane elastomers are separately arranged at the end head of a left punch of a mould and at the end head of a right punch of the mould, and a paraffin filling extrusion and expansion process method is adopted, so that the problems and the defects of poor quality, a high rejection rate, high cost, and proneness to occurrence of fatigue break hidden trouble in the prior art are overcome, and therefore, the production for the titanium alloy sealing ring achieves the purpose of improving quality, reducing waste products, reducing cost and eliminating the fatigue break hidden trouble.

Description

technical field [0001] The invention relates to a forming method of a metal sealing ring, in particular to a forming method of a hollow thin-walled uniform-thick titanium alloy sealing ring used for forming a special-shaped hollow thin-walled uniform-thick titanium alloy sealing ring in an aerospace engine. Background technique [0002] Metal sealing rings used in aerospace engines not only require high precision and uniform wall thickness, but also need to adapt to high temperature, high pressure, and high speed working conditions. At the same time, they must have good vibration tracking and fatigue resistance. Therefore, aerospace engines choose Titanium alloy sealing ring; the forming of titanium alloy sealing ring, the existing technology adopts the process methods such as swirling pressure forming, low melting point alloy extrusion expansion type or oil pressure expansion type. It will be damaged and prone to fatigue fracture accidents; the wall thickness uniformity of ...

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Problems solved by technology

[0002] Metal sealing rings used in aerospace engines not only require high precision and uniform wall thickness, but also need to adapt to high temperature, high pressure, and high speed working conditions. At the same time, they must have good vibration tracking and fatigue resistance. Therefore, aerospace engines choose Titanium alloy sealing ring; the forming of titanium alloy sealing ring, the existing technology adopts the process methods such as swirling pressure forming, low melting point alloy extrusion expansion type or oil pressure expansion type. It will be damaged and prone to fatigue fracture accidents; the wall thickness uniformity of low-melting point alloy extruded expansion products is poor, which does not meet the requirements of aerospace engines; the shape and position accuracy of oil pressure expansion products is poor, and the scrap rate is high, resulting in high cost. Therefore, there are problems and deficiencies in the existing technology such as poor quality, high scrap rate, high cost, and prone to fatigue fractures

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