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Hot riveting method for TC4 titanium alloy pin

A hot riveting and titanium alloy technology, which is applied in the field of hot riveting of titanium alloy pins, can solve problems such as increasing the weight of the engine

Inactive Publication Date: 2021-05-25
北京力威尔航空精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the density of steel parts is much higher than that of titanium alloys, for aero engines with strict weight control, a large number of steel pins will greatly increase the weight of the engine

Method used

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  • Hot riveting method for TC4 titanium alloy pin
  • Hot riveting method for TC4 titanium alloy pin
  • Hot riveting method for TC4 titanium alloy pin

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Embodiment Construction

[0024] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0025] It can be understood that the numerical values ​​mentioned in the present invention may have errors, and they can be varied within an appropriate range.

[0026] According to a specific embodiment of the present invention, the thermal riveting method of TC4 titanium alloy pins comprises the following steps: the first step: cleaning the plate-shaped parts to be riveted (or the parts to be riveted including the plate-shaped parts) and the pins to be riveted; Step 2: Install the plate-shaped part on the riveting tool and adjust the plate-shaped part. The riveting tool is composed of an upper electrode assembly and a lower electrode assembly; Step 3: Use the lower electrode clamping device to clamp the pin , control the heating current, heating time, and riveting pressure of the projection welding machine to rivet the parts, loosen the...

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Abstract

The invention relates to a hot riveting method for a TC4 titanium alloy pin. The hot riveting method is characterized by comprising the following steps: 1, a to-be-riveted plate-shaped part and a to-be-riveted pin are cleaned; 2, the plate-shaped part is installed on a riveting tool and leveled, and the riveting tool is composed of an upper electrode assembly and a lower electrode assembly; 3, the pin is clamped, the heating current, the heating time and the riveting pressure of a projection welding machine are controlled to rivet the plate-shaped part so as to guarantee the size and the appearance of the plate-shaped part and the torque requirement of 4-9 Nm between the pin and the plate-shaped part, then the plate-shaped part is taken down, wherein the riveting pressure ranges from 0.06 Mpa to 0.14 Mpa, the heating time is 0.14 s, and the heating current ranges from 4.0 KA to 4.6 KA; and optionally 4, visual inspection is conducted on the riveted plate-shaped part, and torque test is conducted on the riveted first and last test pieces.

Description

technical field [0001] The invention relates to the hot riveting field of titanium alloy pins. Background technique [0002] The aviation manufacturing industry uses a large number of riveting technologies, which can be divided into hot riveting and cold riveting according to whether the riveting process needs to be heated, and can be divided into vertical pressure riveting and rotary riveting according to the force direction of the riveting process. For some materials with poor ductility, the cold riveting process is difficult to form, and it is easy to cause defects such as riveting head bursting. TC4 titanium alloy is widely used in the manufacture of aero-engine parts due to its high specific strength. For the purpose of weight reduction, the pins of some parts are designed as TC4 titanium alloy pins, but because the plasticity and toughness of TC4 pins are poor at room temperature, it needs to be heated to a certain temperature and then apply a small riveting force to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J15/08B21J15/38
CPCB21J15/08B21J15/38
Inventor 任思李卫卫
Owner 北京力威尔航空精密机械有限公司
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