20世纪60年代末。美国人提出“齐射计划”，但由于这种分弹头质量小，远战性差，特别是自动武器小口径化以后，“齐射理论”更难突破。德国的G11步枪采用无壳弹系统，设计了一种旋转枪机，使供弹入膛的行程特别小，射击频率可达到2000发/min以上，并以三发点射机构加以控制，十分接近“齐射理论”，但由于种种原因G11步枪的研发被迫停止，令人惋惜。但同一理念在俄罗斯推出的AN94突击步枪中得以再次实现，AN94采用传统的有壳枪弹，但可以实现两发高频点射。AN94突击步枪可以说代表了现代突击步枪的又一高度。但其本身由于结构复杂，导致成本过高，采用了很多新型结构使得训练成本大幅增加等问题，导致其无法大规模装备部队，制约了AN94的发展。该文研究的“回”字形枪机，采用全新的“回”字形结构，枪机偏转式供弹大大缩短了供弹行程，使得步枪可以高射频发射，采用弹匣与内机匣一起后坐的结构，保证步枪可以完成三发高频点射的供弹过程。采用传统的有壳枪弹，但同样可以达到G11的三发点射射击的效果。同时“回”字形结构的结构简单，生产成本低廉，使得该步枪规避了AN94突击步枪的尴尬局面。具有良好的发展前景。7478
关键词 “回”字形枪机 高频点射 变射频Title The overall program design of the “回”shapedaction
目 次
1 绪论
1
1.1 研究背景和意义
1
1.2 突击步枪发展现状 2
1.3 国内外研究情况
3
1.4 本文研究内容及手段

9
2 “回”字形运动枪机原理简述
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2.1 “回”字形运动枪机的基本概念

10
2.2 “回”字形运动枪机基本原理 11
2.3 “回”字形运动枪机的作用和特点

13
3 总体方案设计分析
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3.1 自动方式

15
3.2 闭锁方式

17
3.3 供弹机构

17
3.4 击发机构与发射机构

19
3.5 总结
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4 枪管和内机匣结构设计 23
4.1 枪管结构设计
23
4.2 内机匣结构设计
29
结论
33
致谢
34
参考文献 35Abstract
The 1960s the American puted foward a “ Volley plan ”,but due to the small mass
of these sub-warhead,bad for long-distance battle,especially after the small-caliber
automatic weapons,“Volley Plan” is harderbreaktthrough.The G11 of German rifle
with caseless cartridge,designed a rotating actionf for cartridge into the breech of
the trip,especially small,the firing rate of 2000 rounds/min or more, and
three-round burst institutions to control, very close to “Volley Plan”,but was
forced to stop due to various reasons .It was very regrettable. The same idea was
achieved by AN94 desgined by Russia. AN94 uses the traditional bullets,but can
be two rounds of high-frequency burst. AN94 can be thought a milestone of the
modern assault rifles. But its complex structure, the high cost, the use of many
new structure makes the cost of training a substantial increase to result from
large-scale equip our troops, which restricts the development of the AN 94
In this paper, the “回”shaped action, using a new “回”shaped structure, the
bolt deflection for shells greatly shorten the trip for bomb, making the rifle can
shoot in frequency, using the structure of magazine recoiling with the reveiver to
ensure that the third round of high-frequency burst of the bomb process can be
completed. Using traditional bullets, but can also achieve the effect of the
three-round burst firing in the G11. The same time the structure of “回”shaped
action is simple an low cost of production, allows the rifle to avoid the enbarrassing 回字形运动枪机总体方案设计:http://www.youerw.com/jixie/lunwen_5462.html