Forming and prestress flattening method for steel plate with ultra wide width and small thickness error

A small-thickness, pre-stressed technology, applied to other manufacturing equipment/tools, jet propulsion devices, rocket engine devices, etc., can solve the problems that cannot satisfy the production of front and rear heads, so as to improve the flattening efficiency and Quality, reduced processing costs, precise thickness control effects

Active Publication Date: 2014-11-19
AEROSPACE SCI & IND KET TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then, with the development of solid rocket motors, the size of the front head and the rear head of the combustion chamber casing is constantly increasing, and the existing standard width steel plate can no longer meet the production of the front head and the rear head. It is an urgent problem to be solved in this industry to produce the ultra-wide and small thickness error steel plates required for the production of front and rear heads.

Method used

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  • Forming and prestress flattening method for steel plate with ultra wide width and small thickness error
  • Forming and prestress flattening method for steel plate with ultra wide width and small thickness error
  • Forming and prestress flattening method for steel plate with ultra wide width and small thickness error

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Embodiment 1

[0031] Embodiment 1: For a rocket combustion chamber shell head with a diameter of Φ1400mm for a certain aircraft, the diameter d required by the stretching process design of the rocket engine combustion chamber casing head is Φ1900mm, and the thickness t of the thin-walled cylinder 4 1 4.1mm, the forming and prestressed flattening process of the ultra-wide, small thickness error steel plate is as follows:

[0032] Step 1: set the width to B (according to B≥(t 1 D+t 1 2 )÷(t 0 D+t 0 2 )×(d+200)+50mm formula is calculated as 1483mm, and the original width B=1500mm is selected according to GB / T709 "Size, Shape, Weight and Permissible Deviation of Hot-rolled Steel Plates and Steel Strips", where, t 1 The thickness of the thin-walled cylinder 4 is 4.1 mm, t 0 The thickness of the narrow thick steel plate is 6mm, D is the diameter of the inner hole of the thin-walled cylinder 4 is Φ1400mm, d is the diameter required by the stretching process design of the shell head of the ro...

Embodiment 2

[0041] Embodiment 2: For a rocket combustion chamber shell head with a diameter of Φ1600mm for a certain aircraft, the diameter d required by the stretching process design of the rocket engine combustion chamber shell head is Φ2150mm, and the thickness of the thin-walled cylinder 4 is t 1 4.5mm, the forming and prestressed flattening process of the ultra-wide, small thickness error steel plate is as follows:

[0042] Step 1: set the width to B (according to B≥(t 1 D+t 1 2 )÷(t 0 D+t 0 2 )×(d+200)+50mm formula is calculated as 1369mm, and the original width B=1400mm is selected according to GB / T709 "Size, Shape, Weight and Permissible Deviation of Hot-rolled Steel Plates and Steel Strips", where, t 1 The thickness of the thin-walled cylinder 4 is 4.5mm, t 0 The thickness of the narrow thick steel plate is 8mm, D is the diameter of the inner hole of the thin-walled cylinder 4 is Φ1600mm, d is the diameter required by the stretching process design of the shell head of the r...

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Abstract

The invention discloses a forming and prestress flattening method for a steel plate with ultra wide width and small thickness error. 1, a steel plate with narrow width is rolled, welded and annealed, and a thick-wall cylinder blank is formed; 2, a numerical control spinning machine with three spinning rollers is used for rolling the thick-wall cylinder blank into a thin-wall cylinder; 3, an anti-rotating ring on the thick-wall cylinder blank is cut, then the thin-wall cylinder is slit and flattened into the steel plate with ultra wide width, and the steel plate with ultra wide width is cut into a thin-wall cake steel plate; 4, the thin-wall cake steel plate is subjected to annealing treatment in ordinary vacuum protection, inert atmosphere protection or coating protection. When the steel plate is processed with the method, the processed steel plate can meet the manufacturing requirement for a front sealing end and a rear sealing end of an existing combustion chamber housing with a large size.

Description

technical field [0001] The invention relates to the technical field of processing special steel plates for shell heads of rocket engine combustion chambers, in particular to a forming and prestressed flattening method for ultra-wide and small-thickness error steel plates dedicated to shell heads of rocket combustion chambers. Background technique [0002] The solid rocket motor is the power device of the aerospace vehicle, which is composed of the main parts such as the combustion chamber shell, 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 combustion chamber shell is welded by parts such as front head, cylindrical body and rear head, and machined after heat treatment. The front head and the rear head are important load-bearing components on the combustion chamber shell, and an igniter and a thrust termination mechanism are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/04
CPCB23P23/04F02K9/34
Inventor 韩庆波黄丹妮王华东初敬生余天雄
Owner AEROSPACE SCI & IND KET TECH CO LTD
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