Cartridge case substrate swelling assembling method

Abstract

The invention relates to a cartridge case substrate swelling assembling method and belongs to the field of assembling of rocket projectile parts. According to the swelling assembling method provided by the invention, during swelling, a low-hardness conduit has plastic deformation, and high-hardness front and back sleeves have elastic deformation. After swelling connection is completed, the conduithaving the plastic deformation is extruded by the hole wall, with elastic recovery, of a cartridge case, and therefore, the conduit and the front and back sleeves are tightly bonded together. According to the swelling assembling method provided by the invention, it can be ensured that the inner surface of the conduit has no hardening phenomenon, and the expansibility is uniform; the technical purpose that the front and back sections of a cartridge case substrate and the conduit are assembled is achieved, and meanwhile, the batch production quality can be guaranteed; in addition, the swellingmethod can afford certain axial force, thermal shock and repeated thermal cycling, pipe wall metal almost can fill a pipe control groove, the axial pulling-out force is large, and the leakproofness isgood; and furthermore, operation is easy, application is flexible, the man-hour for swelling one piece is 5 minutes, the labor intensity is low, and environment friendliness is achieved.

Description

technical field [0001] The invention relates to a method for assembling a base body of a cartridge under expansion and pressure, and belongs to the field of assembling rocket shell parts. Background technique [0002] When the cartridge base is assembled, the threading pipe needs to be inserted into the front and rear sleeves to realize the sealed connection. After the cartridge is assembled, conduct an air tightness test with a pressure of 0.6MPa±0.02MPa and a duration of 60s. The material of the base body of the cartridge is alloy steel with a wall thickness of 4mm and a tensile strength of ≥600MPa; the material of the threading pipe is aluminum alloy with a wall thickness of 2mm and a length of 1000mm and a tensile strength of ≥390MPa. The commonly used methods are: threaded connection, welding , Adhesive with resin etc. Obviously, the two thin-walled parts can no longer be connected by thread; the method of welding has welding bumps and welding slag flowing into the th...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a cartridge base expansion and pressure assembly method to solve the shortcomings of damaged parts, high scrap rate, and easy seal failure when the traditional connection method is used to assemble the base body of the cartridge

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