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Spinning forming method of engine casing

An engine casing and spinning forming technology, which is used in the spinning forming of slender and thin-walled rotating body parts of high-strength steel materials, and the double-wheel anti-spinning field of engine casings, which can solve the problem of three-wheel spinning. The machine tool cannot spin rotary parts with a diameter of less than 300mm, and the dimensional accuracy is not high, so as to achieve the effects of high production efficiency, good surface quality and high precision

Active Publication Date: 2015-08-26
HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a double-rotor reverse-spinning forming method for the engine casing, which solves the problem that the general three-rotor spinning machine tool cannot spin with a diameter less than 300mm The problem of the rotary body parts, and solve the problem of low dimensional accuracy of the slender and thin-walled rotary body parts of the roll-welded high-strength steel material, improve the quality of the engine casing, and meet the dimensional accuracy of the casing

Method used

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  • Spinning forming method of engine casing

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Experimental program
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Embodiment 1

[0026] See figure 1 , the length is 2250±3mm, the diameter is 260±0.5mm, the roundness requirement is not greater than 0.8mm, the gap between the busbar and the model is not greater than 1.2mm, and the wall thickness is 1.5+0.2 -0.1mm.

[0027] The order of this embodiment includes:

[0028] (1) Rough processing steps:

[0029] Select a cylindrical high-strength steel forging blank. The internal structure of the material requires ultrasonic flaw detection. The qualified forging blank is machined to a straight cylindrical blank with a thickness of 9.5mm±0.1mm. The inner wall finish is not greater than Ra1.6um, and its shape is as follows: figure 1 Shown; Carry out spheroidizing annealing treatment on the straight cylindrical blank;

[0030] (2) Spinning step: install the straight cylindrical blank on the mandrel, and install the special rotary wheel horizontally and symmetrically on the double rotary wheel spinning machine tool. The shape is as follows: figure 2 , image...

Embodiment 2

[0033] See figure 1 , the length is 1500±3mm, the diameter is 260±0.5mm, the roundness requirement is not greater than 0.8mm, the gap between the busbar and the model is not greater than 1.2mm, and the wall thickness is 2±0.1mm.

[0034] The order of this embodiment includes:

[0035] (1) Rough processing steps:

[0036] Select a cylindrical high-strength steel forging blank, and the internal structure of the material requires ultrasonic flaw detection. The qualified forging blank is machined to a straight cylindrical blank with a thickness of 12mm±0.1mm, and the inner wall finish is not greater than Ra1.6um; the straight cylindrical blank is spheroidized annealing treatment;

[0037] (2) Spinning step: install the straight cylindrical blank on the mandrel, and install the special rotary wheels horizontally and symmetrically on the double rotary wheel spinning machine; The linear trajectory of each pass, the wall thickness reduction rate of each pass is 33.3% to 40%, and t...

Embodiment 3

[0040] See figure 1, the length is 2000±3mm, the diameter is 270±0.5mm, the roundness requirement is not greater than 0.8mm, the gap between the busbar and the model is not greater than 1.2mm, and the wall thickness is 1.2±0.1mm.

[0041] The order of this embodiment includes:

[0042] (1) Rough processing steps:

[0043] Select a cylindrical high-strength steel forging blank, and the internal structure of the material requires ultrasonic flaw detection. The qualified forging blank is machined to a straight cylindrical blank with a thickness of 8mm±0.1mm, and the inner wall finish is not greater than Ra1.6um; the straight cylindrical blank is spheroidized annealing treatment;

[0044] (2) Spinning step: install the straight cylindrical blank on the mandrel, and install the special rotary wheels horizontally and symmetrically on the double rotary wheel spinning machine; The linear trajectory of each pass, the wall thickness reduction rate of each pass is 30% to 36.8%, and t...

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Abstract

The invention relates to an engine shell spinning forming method which comprises the following steps of (1) a blank processing step, (2) a spinning step, and (3) a postprocessing step. According to the engine shell spinning forming method, processes are stable and reliable, production efficiency is high, surface quality of products is good, accuracy is high, the problem that a revolution component with the diameter smaller than 300mm cannot be spun through a three-spinning-roller spinning machine tool is resolved, and the problem that size accuracy is not high in the method that a steel revolution component which is long, thin, high in strength, and thin in wall thickness is welded in a rolled mode is resolved.

Description

technical field [0001] The invention belongs to the spinning forming method of a straight cylinder-shaped revolving body part, in particular to a double-rotor counter-rotating spinning forming method of an engine casing, which is suitable for spinning forming of a slender and thin-walled revolving body part made of high-strength steel. Background technique [0002] The engine casing is an important part of aerospace products, and most of them are thin-walled straight cylindrical rotary parts made of high-strength steel. With the development of aerospace products towards supersonic speed and high precision, the requirements for the quality reliability and dimensional accuracy of the engine are getting higher and higher. At present, the slender straight cylindrical thin-walled rotary parts of high-strength steel materials are generally processed by rolling welding forming method and spinning forming method. [0003] Roll welding forming method, the size, roundness and surface...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/16
Inventor 张军段澎鄢江武谢智朱婷婷
Owner HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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