Welding method for small airborne rocket case

A technology of a rocket shell and a welding method, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of high processing efficiency, the excess height cannot be greater than 0.3mm, and the manufacturing cost is low, and achieves fast and accurate installation and positioning. Effect

Active Publication Date: 2019-07-30
湖北三江航天江北机械工程有限公司
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AI Technical Summary

Problems solved by technology

The traditional butt welding method of medium and large solid rocket combustion chamber shells is difficult to meet the new requirements of large number of airborne small rocket shells, high processing efficiency and low manufacturing cost
[0004] For small rocket shells with a diameter of less than 260mm and materials made of 30CrMnSiA low-alloy high-strength steel, class I butt welds

Method used

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  • Welding method for small airborne rocket case
  • Welding method for small airborne rocket case
  • Welding method for small airborne rocket case

Examples

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Effect test

Embodiment 1

[0060] For a certain type of 30CrMnSiA low-alloy high-strength steel small shell, its external diameter D3 is 140mm, shell length L0 is 550mm, and wall thickness t is 2mm. The airborne small rocket shell welding method of the present invention is as follows:

[0061] 1) Processing of the front head shell and the rear joint shell of the cylinder

[0062] The raw material of the cylinder is roughly machined into the front head shell, the front end of the front head shell is provided with a finishing chuck, and the rear end of the front head shell is provided with a front circle which is butt-welded with the rear joint shell of the cylinder. and the rear end of the inner wall of the front cylinder section is provided with a front positioning annular notch, the rear end face of the front cylinder section is provided with a front bevel, and the inner edge of the front bevel is perpendicular to the surface between the end faces of the front positioning annular notch. The front butt ...

Embodiment 2

[0080] For a certain type of 30CrMnSiA low-alloy high-strength steel small shell, its external diameter D3 is 180mm, shell length L0 is 850mm, and wall thickness t is 2.5mm. The airborne small rocket shell welding method of the present invention is as follows:

[0081] 1) Processing of the front head shell and the rear joint shell of the cylinder

[0082] The raw material of the cylinder is roughly machined into the front head shell, the front end of the front head shell is provided with a finishing chuck, and the rear end of the front head shell is provided with a front circle which is butt-welded with the rear joint shell of the cylinder. and the rear end of the inner wall of the front cylinder section is provided with a front positioning annular notch, the rear end face of the front cylinder section is provided with a front bevel, and the inner edge of the front bevel is perpendicular to the surface between the end faces of the front positioning annular notch. The front but...

Embodiment 3

[0100] For a certain model 30CrMnSiA low-alloy high-strength steel small shell, its external diameter D3 is 220mm, the shell length L0 is 1150mm, and the wall thickness t is 3mm. The airborne small rocket shell welding method of the present invention is as follows:

[0101] 1) Processing of the front head shell and the rear joint shell of the cylinder

[0102] The raw material of the cylinder is roughly machined into the front head shell, the front end of the front head shell is provided with a finishing chuck, and the rear end of the front head shell is provided with a front circle which is butt-welded with the rear joint shell of the cylinder. and the rear end of the inner wall of the front cylinder section is provided with a front positioning annular notch, the rear end face of the front cylinder section is provided with a front bevel, and the inner edge of the front bevel is perpendicular to the surface between the end faces of the front positioning annular notch. The fron...

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Abstract

The invention discloses a welding method for a small airborne rocket shell. The welding method for the small airborne rocket case comprises the steps of machining of a front sealing head shell and a rear cylindrical connector shell, machining of a left section and a right section of a butt-welding sample, assembling and positioned welding, but welding of a prefabricated shell part and a prefabricated welding sample part, radiographic inspection of a weld joint, repair welding, radiographic inspection, and stress relief annealing. According to the welding method for the small airborne rocket shell, a butt-joint circumferential weld positioning structure is adopted, so that butt-welding mounting and positioning of the case are rapid and accurate and can be completed in two minutes, while themounting and positioning time of a traditional method is over 15 minutes; and a welding mandrel does not need to be dismantled, while the time for dismantling the welding mandrel of the traditional method is over 10 minutes. The welding method not only can be used for efficient welding of the small airborne rocket shell, but also can be used for efficient welding of other similar product parts.

Description

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Claims

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Application Information

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Owner 湖北三江航天江北机械工程有限公司
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