摘要本论文主要完成了某轻型机枪的枪管、自动机构、开闭锁机构的结构设计，并对供弹和输弹机构、击发机构和架座也进行了初步的设计，使本武器具有重量轻、结构紧凑、战术性能更优秀的特点。对枪管进行了弹道学设计计算，并运用强度理论进行枪管了校核；自动方式创新采用了膛内活塞自由后坐式，估算了自动机运动诸元，并绘制了自动工作循环图；开闭锁机构进行了受力分析并推导其传速比及传动效率。最终运用SolidWorks绘制了轻型机枪的三文装配体，用AUTOCAD完成了重要零件的二文图的绘制。9504
关键词 轻型机枪 结构设计 强度校核 受力分析毕业设计说明书（论文）外文摘要
Title The Scheme Design and Analysis of Lightweight Machine Gun
Abstract
This paper was mainly conducted the structure design of gun barrel, the automatic mechanism and the locking mechanism of lightweight machine gun, and the feeding mechanism, transmission mechanism, firing mechanism and mount were preliminarily designed. This design made this weapon lightweight, compact structure and excellent tactical performance. The barrel was designed and calculated with interior ballistics theory and its strength was verified; The innovative operation principle of in-bore piston free recoil was employed; The motion parameters of automata were estimated and the operation cyclic diagram was plotted; The mechanics analysis about opening and locking mechanism was carried out and the velocity transmission ratio and transmission efficiency were deduced. Finally based on SoildWorks the three-dimensional assembly of the lightweight machine gun was completed, and the two-dimensional drawings of the important parts of it were plotted with AUTOCAD.
Keywords Lightweight Machine Gun, Structural Design,
Strength verification, Stress Analysis
目 次
1 引言 1
1.1 机枪轻量化概念及实现途径 1
1.2 各国轻量化机枪的设计特点分析 2
2 轻型机枪总体方案设计 3
3 枪管设计 5
3.1 内弹道设计 5
3.2 弹膛设计 7
3.3 线膛设计 9
3.4 枪管强度设计 10
4 武器自动方式设计 12
4.1 自动方式的拟制 15
4.2 自动机运动诸元的估算 17
4.3 自动工作循环图的制定 20
5 闭锁机构设计 21
5.1 闭锁机构的作用 21
5.2 闭锁机构的结构设计 22
5.3 闭锁机构支撑部分的接触强度与接触疲劳寿命 22
5.4 加速机构的分析与设计 24
6 其他机构设计 34
6.1 供弹和输弹机构设计 34
6.2 击发机构设计 35
6.3 架座设计 35
结论 37
致谢 38
参考文献 39
1 引言
机枪（Machine Gun）指全自动、可快速连续发射的枪械。通常分为轻机枪、中型机枪、通用机枪、重机枪等几种，口径在20毫米以上的叫“机炮”（Auto cannons）。轻机枪装有两脚架，重量较轻，携行方便，可卧姿抵肩射击，也可立姿或行进间射击，战斗射速一般为80～150发/分左右，有效射程500～800米；重机枪装有稳固的枪架，射击精度较好，能长时间连续射击，全枪较重，可分解搬运，其战斗射速为200～300/分，有效射程平射为800～1000米，高射500米；通用机枪，亦称两用机枪，以两脚架支撑可当轻机枪用，装在枪架上可当重机枪用；大口径机枪，是重机枪的一种，口径一般在12毫米以上，可高射2000米内的空中目标、地面薄壁装甲目标和火力点。 SolidWorks轻型机枪的方案设计与分析:http://www.751com.cn/jixie/lunwen_8250.html