摘要近年来，我国研制成功了5.8mm口径系列步枪，尽管如此仍然存在很多现阶段还不能解决的问题，如人机功效、系统匹配不协调等问题，我国小口径步枪和欧美小口径步枪之间仍有一定的差距。本论文开展了自动步枪系统总体设计，系统阐述了选择一种枪械结构需要考虑的因素和各个结构时对每种结构优缺点的取舍问题；开展了枪管、枪机和击针等三个自动步枪重要结构设计与分析计算，。采用自动武器气体动力学和内弹道解法以及材料力学强度校核的方法进行了枪管的设计；采用了自动武器结构设计和冲击疲劳强度计算以及材料力学强度校核等方式进行枪机的设计；根据击针的特殊要求，对击针进行了详细的分析计算。设计与分析结果表明，所设计的三个重要零部件能满足系统的性能要求。28995
关键词 小口径 结构设计 导气式 枪机回转 枪管设计 击针设计
毕业论文设计说明书外文摘要
Title structure design for a new generation of small- caliber rifle
Abstract
In recent years, the 5.8mm caliber rifle series has been developed successfully in China .but there are still many problems that can not be solved at this stage, such as human machine effect, system matching and so on .Therefore , a certain gap on small caliber rifles between China and European countries still exist.
This paper carried out the design and analysis calculation of the three important automatic rifle structures ：the barrel, bolt and fire pin . In this paper, the automatic weapon gas dynamics and internal ballistic solution and mechanical strength check method have been used for the design of the barrel. In addition， the design of automatic weapon structure and the way of fatigue strength calculation and material mechanical strength check method have been used for the design of bolt.According to the special request of the fire pin ,the detailed analysis and calculation of the striking needle have been carried out.the result of this Design and analysis showed that the three important parts can meet the performance requirements of the system.
Keywords small-caliber structural design Gas-operated Rotating bolt Barrel design Firing pin design
目 录
1 绪论 1
1.1 小口径步枪的概念及优点 1
1.2 小口径步枪国内外发展状况 1
1.3 小口径步枪结构特点 2
1.3.1 自动方式 2
1.3.2 闭锁机构 2
1.3.3 增设点射控制机构机构 2
1.3.4 新材料和新工艺 2
2 结构比较与选择 3
2.1 步枪结构参数对比 3
2.2 战术技术指标的选择 4
3 枪管设计 6
3.1 枪管设计要求和外形结构 6
3.1.1 设计要求 6
3.1.2 枪管外部结构设计 6
3.2 枪管内膛结构设计 7
3.2.1 弹膛设计 7
3.2.2 坡膛设计 8
3.2.3 线膛设计 10
3.3 枪管管壁强度设计 15
3.3.1 枪管壁内的应力与应变 15 新一代小口径步枪结构设计:http://www.751com.cn/jixie/lunwen_24068.html