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Diameter and shape precision control method of thin-walled cylinder and special tool thereof

A thin-walled cylinder and precision control technology, applied in the processing field of thin-walled cylinders, can solve the problems of poor shape calibration accuracy, time-consuming, inability to meet accuracy requirements, etc., and achieve high diameter size and shape accuracy, accurate diameter size control, and shape correction effect. good effect

Active Publication Date: 2015-02-18
AEROSPACE SCI & IND KET TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is time-consuming and laborious, and the accuracy of shape correction is poor, and often cannot meet the accuracy requirements specified in the design.

Method used

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  • Diameter and shape precision control method of thin-walled cylinder and special tool thereof
  • Diameter and shape precision control method of thin-walled cylinder and special tool thereof
  • Diameter and shape precision control method of thin-walled cylinder and special tool thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] For a thin-walled cylinder with a size parameter of Φ880mm×2000mm and a wall thickness of 3.8mm on an aircraft, the control process of its diameter and shape accuracy is as follows:

[0036] 1) Design of the 3 diameters of the thin-walled cylinder before shaping: the process design controls the thin-walled cylinder to have an appropriate amount of plastic tensile deformation in the 3 circumferential directions after the shaping, and its wall thickness reduction is 0.023mm. Outer diameter dimension d of thin-walled cylinder 3 before shaping 2 Calculated as d according to the formula 2 = d 1 ×t 1 / t 2 =880×3.8 / 3.82=876mm, where, d 1 is the outer diameter of thin-walled cylinder 3 after shaping, t 1 is the wall thickness of thin-walled cylinder 3 after shaping, t 2 It is the wall thickness of the thin-walled cylinder 3 before the correction.

[0037] 2) Preheating of the thin-walled cylinder 3: Position the thin-walled cylinder 3 on the base 2.3 of the special sprea...

Embodiment 2

[0049] For a thin-walled cylinder with a size parameter of Φ1200mm×2400mm and a wall thickness of 4.0mm on an aircraft, the control process of its diameter and shape accuracy is as follows:

[0050] 1) Design of the 3 diameters of the thin-walled cylinder before shaping: the process design controls the thin-walled cylinder to have an appropriate amount of plastic tensile deformation in the 3 circumferential directions after the shaping, and the thickness reduction of the thin-walled cylinder is 0.01mm. Outer diameter dimension d of thin-walled cylinder 3 before shaping 2 Calculated as d according to the formula 2 = d 1 ×t 1 / t 2 =1200×4.0 / 4.01=1197mm, where, d 1 is the outer diameter of thin-walled cylinder 3 after shaping, t 1 is the wall thickness of thin-walled cylinder 3 after shaping, t 2 It is the wall thickness of the thin-walled cylinder 3 before the correction.

[0051] 2) Preheating of the thin-walled cylinder 3: Position the thin-walled cylinder 3 on the base...

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Abstract

The invention discloses a diameter size and shape precision control method of a thin-walled cylinder of a rocket chamber shell. The diameter size and shape precision control method comprises the following steps of: 1) thin-walled cylinder diameter design before sizing; 2) thin-walled cylinder pre-heating treatment; 3) installation of special thermal bulging core die; 4) thermal bulging treatment of a thin-walled cylinder; 5) discharging and cooling; 6) appearance detection of the thin-walled cylinder; and 7) repetition of sizing treatment. By utilizing the diameter size and shape precision control method provided by the invention, quantitative thermal bulging with proper plastic stretching is carried out on the thin-walled cylinder by using the special thermal bulging core die, so that the diameter size is accurately controlled, and the appearance correction effect is good. The diameter size and shape precision of the obtained thin-walled cylinder are higher, so that the product design precision requirements can be entirely met.

Description

technical field [0001] The invention relates to a processing method of a thin-walled cylinder, in particular to a method for controlling the diameter and shape accuracy of a thin-walled cylinder of a rocket combustion chamber shell and a special tool thereof. Background technique [0002] The thin-walled shell has the characteristics of light weight, material saving, compact structure, etc., and can meet the requirements of the cylindrical shell of the afterburning chamber of the solid rocket ramjet. The solid rocket motor is the power device of the aerospace vehicle, which is composed of the main parts such as the combustion chamber, the propellant grain, the nozzle, and the igniter. The combustor casing is a key part of the solid rocket motor system, which provides power to the vehicle through the combustion of propellant. The cylindrical section of the combustion chamber shell is formed by butt-welding of 2 to 4 thin-walled cylinders. After the propellant is burned, it m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D1/08
Inventor 韩庆波张朔王华东余天雄
Owner AEROSPACE SCI & IND KET TECH CO LTD
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