A kind of closing method of titanium alloy self-locking nut

A technology of self-locking nuts and titanium alloys, applied in the direction of nuts, threaded fasteners, connecting components, etc., can solve problems such as cracks and cracks in deformation areas, and achieve remarkable effects, simple operation, and high strength

Active Publication Date: 2017-10-20
AVIC STANDARD PARTS MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for the Ti-6Al-4V / TC4 titanium alloy self-locking nut in the annealed state (δb≥930MPa), the direct cold deformation closing method is adopted, and cracks may appear during the deformation process; and for solid solution and aging ( δb≥1103MPa, τb≥665MPa) Ti-6Al-4V / TC4 titanium alloy self-locking nut, direct cold deformation will cause cracks in the deformed area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for closing a titanium alloy self-locking nut, comprising the following steps:

[0015] (1) Put the formed titanium alloy self-locking nut with a hexagonal head size of 8mm into a titanium alloy water quenching furnace for solution treatment at a temperature of 944°C and a time of 2 hours;

[0016] (2) Perform conventional machining on the titanium alloy self-locking nut after solution treatment;

[0017] (3) Heat the titanium alloy self-locking nut processed by conventional machining. Before the heat treatment, adjust the temperature of the heating device to 300°C and correct it. The heating time is determined to be 8×1.5min, that is, the heating time is 12min. , the heating temperature is 250°C;

[0018] (4) Take out the titanium alloy self-locking nuts that have been heat-treated in order to complete the closure;

[0019] (5) Put the closed titanium alloy self-locking nut into a special vacuum furnace for titanium alloy for aging heat treatment, the heatin...

Embodiment 2

[0022] A method for closing a titanium alloy self-locking nut, comprising the following steps:

[0023] (1) Put the formed Ti-6Al-4V titanium alloy self-locking nut with a hexagonal head size of 8 mm into a titanium alloy water quenching furnace for solution treatment at a temperature of 964 °C and a time of 1 h;

[0024] (2) Perform conventional machining on the titanium alloy self-locking nut after solution treatment;

[0025] (3) Heat the titanium alloy self-locking nut processed by conventional machining. Before the heat treatment, adjust the temperature of the heating device to 300°C and correct it. The heating time is determined to be 8×1.8min, that is, the heating time is 14.4 min, the heating temperature is 270°C;

[0026] (4) Take out the titanium alloy self-locking nuts that have been heat-treated in order to complete the closure;

[0027] (5) Put the closed titanium alloy self-locking nut into a special vacuum furnace for titanium alloy for aging heat treatment, t...

Embodiment 3

[0030] A method for closing a titanium alloy self-locking nut, comprising the following steps:

[0031] (1) Put the formed TC4 titanium alloy self-locking nut with the outer diameter of the head of 8 mm into the titanium alloy water quenching furnace for solution treatment at a temperature of 954 °C and a time of 1.5 h;

[0032] (2) Perform conventional machining on the titanium alloy self-locking nut after solution treatment;

[0033] (3) Heat the titanium alloy self-locking nut processed by conventional machining. Before the heat treatment, adjust the temperature of the heating device to 300°C and correct it. The heating time is determined to be 8×1.65min, that is, the heating time is 13.2 min, the heating temperature is 260°C;

[0034] (4) Take out the titanium alloy self-locking nuts which have been heat-treated by heat sealing in turn, and carry out deformation on the universal nut closing machine to complete the closing;

[0035] (5) Put the closed titanium alloy self-...

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PUM

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Abstract

The invention discloses a shell nosing method of titanium alloy self-locking nuts. The shell nosing method comprises the following steps that the moulded titanium alloy self-locking nuts are put in a titanium alloy water quenching furnace and are subjected to solution treatment; the titanium alloy self-locking nuts after the solution treatment are subjected to conventional mechanical processing; the titanium alloy self-locking nuts after the conventional mechanical processing are subjected to hot shell nosing heating treatment; the titanium alloy self-locking nuts after the hot shell nosing heating treatment are sequentially taken out and are subjected to shell nosing deformation to accomplish shell nosing; the titanium alloy self-locking nuts after the shell nosing are put in a titanium alloy special vacuum furnace and are subjected to aging heat treatment; and the titanium alloy self-locking nuts after the aging heat treatment are cooled to room temperature. The shell nosing method has the characteristics of simplicity in operation, easiness in popularization and significant effect.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a closing method for a titanium alloy self-locking nut. Background technique [0002] With the development of modern technology, Ti-6Al-4V / TC4 titanium alloy self-locking nuts are widely used, and there are many types and specifications of nuts with different shapes and sizes. At present, for the Ti-6Al-4V / TC4 titanium alloy self-locking nut in the annealed state (δb≥930MPa), the direct cold deformation closing method is adopted, and cracks may appear during the deformation process; and for solid solution and aging ( δb≥1103MPa, τb≥665MPa) Ti-6Al-4V / TC4 titanium alloy self-locking nut, direct cold deformation will cause cracks in the deformed area. Contents of the invention [0003] The purpose of the present invention is to overcome the above difficulties and provide a method for closing the titanium alloy self-locking nut with simple operation, easy popularizat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D53/24C22F1/18
CPCB21D53/24C22F1/183
Inventor 苏毅邓博梁华于海萌黄再江徐畅
Owner AVIC STANDARD PARTS MFG
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