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Method for welding composite bearing band of soft iron mixed with pure copper, and structure of composite bearing band

A composite bullet belt and welding method technology, which is applied in welding equipment, welding/welding/cutting items, ammunition, etc., can solve the problems affecting the life of the gun body, the range of the shell, the wear of the soft iron belt rifling, and the limitation of the belt, etc., to achieve Avoid pan-iron and pan-carbon phenomena, prolong rifling life, and increase the effect of gas-holding degree

Inactive Publication Date: 2013-05-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the soft iron belt also has its disadvantages, mainly because the hardness of soft iron is higher than that of copper. When firing shells, the friction between the belt and the rifling, the wear of the soft iron belt on the rifling is more serious
The belts of the above two materials have their own advantages and disadvantages. Their shortcomings limit the function of the belt, and also affect the life of the gun body and the range of the shell.

Method used

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  • Method for welding composite bearing band of soft iron mixed with pure copper, and structure of composite bearing band
  • Method for welding composite bearing band of soft iron mixed with pure copper, and structure of composite bearing band
  • Method for welding composite bearing band of soft iron mixed with pure copper, and structure of composite bearing band

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Effect test

Embodiment 1

[0024] combine figure 1 , the present invention adopts two kinds of materials to surfacing to form elastic bands on the surface of the projectile, wherein the soft iron elastic bands are located on both sides of the elastic bands, and the pure copper elastic bands are located in the middle, forming a structure in which soft iron fully wraps pure copper.

[0025] In the welding method of the present invention, when surfacing the elastic belt on the surface of the projectile, the soft iron part is first welded, and the soft iron elastic belt is cut and grooved, and then the pure copper part is surfacing welded in the groove opened, and finally the second step is carried out. The secondary cutting process finally forms a complete elastic belt that meets the design requirements. The ratio of the copper elastic belt and the soft iron elastic belt in the composite elastic belt can be flexibly adjusted in the entire elastic belt structure, thereby adjusting the strength of the elastic...

Embodiment 2

[0027] Such as figure 1 As shown, the welding belt structure proposed by the present invention is suitable for the belt manufacturing process of shells with a diameter of 30-100mm. The welding method selected, hot wire TIG, promptly adopts tungsten argon arc welding, and the arc hot wire is semi-automatically fed The way to weld the elastic belt.

[0028] Such as figure 2 As shown, the two electrodes of the secondary TIG power supply are respectively connected to the wire feeder and the workpiece to form a conductive circuit. At the beginning of the welding process, connect the main welding circuit, ignite the main arc to preheat the workpiece for 1-2 seconds, then feed the welding wire through the wire feeding device, and connect the hot wire circuit when the end of the welding wire is 5-8mm away from the workpiece. The size of the belt is designed according to the diameter of the gun body and the function of the shell, and the welding process is carried out. During the w...

Embodiment 3

[0032] At the same time, in the welding process, if the proportion of copper and soft iron is different, elastic belts with different properties can be obtained. After the processing is completed, cut the elastic band longitudinally to expose the cross section. When the cross-sectional area of ​​the pure copper elastic band and the soft iron cross-sectional area are 1:1, the welding process parameters will be changed accordingly. In this case, the soft iron elastic band will be welded Some welding parameters do not need to be changed. The output current of the main TIG power supply is 250A, the auxiliary current is 40-60A, the auxiliary voltage is about 13-15V, the wire feeding speed is 2-3m / min, and the rotation period of the projectile is 100s. After one week, the surfacing welding of the soft iron is completed to ensure a certain penetration depth of the soft iron on the projectile body. Due to the high content of pure copper in the elastic band, and the current is relative...

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Abstract

The invention relates to a method for welding a composite bearing band of soft iron mixed with pure copper, and a structure of the composite bearing band. A bearing band is formed at the surface of a projectile body by overlaying of the soft iron and the pure copper; the soft iron part is welded firstly when the bearing band is surfaced on the surface of the projectile body; a middle open slot of the leveled soft iron bearing band is processed in a cutting manner; then the pure copper part is surfaced inside a groove; secondary cutting and processing are carried out, and finally the intact composite bearing band is formed. The ratio of the copper bearing band to the soft iron bearing band in the composite bearing band in the entire bearing band structure can be flexibly adjusted; and carbon coating and alloying of the bearing band in the welding process are better controlled, so as to adjust the strength, the hardness and the air-tightness of the bearing band. The method can adapt with different service conditions and application scenes. The traditional band-receiving structure is changed fundamentally; the wall of the projectile is thinned; and the charge mass is increased, so that the firing range of a shell is longer.

Description

technical field [0001] The invention relates to the welding technology of elastic belts in the shell manufacturing process, in particular to a welding method and structure of soft iron sandwiching pure copper composite elastic belts. Background technique [0002] Alloy structures deposited on the surface of steel substrates are widely used in the fields of aerospace and weapon manufacturing, such as the assembly of shell belts. The deep groove is not conducive to reducing the wall thickness and increasing the charge, so as to affect the blasting power. New types of projectiles such as terminal-sensitive projectiles, submunitions, prefabricated fragmentation projectiles, etc., if the old technology is still used, it will cause great difficulties to the overall structural design. This is one of the key bottleneck technologies for the manufacture of new projectiles. Research on new welding technologies will change The existing chimera technology has great practical value. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04B23K9/16B23K9/095F42B14/02B23K101/16
Inventor 吕世雄崔庆龙黄永宪郑传奇徐永强曲杰
Owner HARBIN INST OF TECH
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