摘要身管自紧加工是身管加工过程中一种特殊的工艺手段,液压自紧技术作为自紧技术的一种在高膛压火炮身管的设计加工制造中有着广泛的应用。本文对125mm滑膛炮液压自紧身管进行了设计。通过从内弹道参数开始对设计压力曲线进行了设计,再运用单筒身管设计理论对成品身管的强度进行校核,对比安全系数确定自紧长度进行反向设计计算自紧毛坯尺寸,先初步进行毛坯设计再反复对自紧压力和毛坯尺寸进行调整后进行身管强度计算,确定了比较合理的自紧毛坯尺寸,绘制出自紧曲线控制图,并对成品身管自重下挠度进行仿真,达到身管设计要求。69427
毕业论文关键词:身管,液压自紧,厚壁圆筒,弹塑性变形。
毕业设计说明书外文摘要
Title Hydraulic autofrettage design of gun barrel with High pressure
Abstract
Autofrettage processing of barrel is a kind of special processing technology.Hydraulic Autofrettage have wide range of applications in the Production Process of barrel.In this paper, the hydraulic autofrettage barrel of 125 mm smooth bore have been designed.First of all,theory intensity curves have been designed with The internal ballistic parameters.Then, using the theory of monocular barrel to check the strength of The finished product of barrel, calculate the Blank size in reverse after diciding the length of autofrettage with comparing the factor of safety, calculate the strength of barrel after adjusting the pressure of autofrettage and size of workblank.Finally,deciding the reasonable size of workblank , drawing the curve control chart of autofrettage,and simulating deflection of finished product under the weight itself to achieve design requirements.
Keywords:barrel,hydraulic-autofrettage ,Thick-walled cylinder ,Elastic-plastic deformation.
目 次
1 绪论 7
1.1 课题背景和意义 7
1.2.1国外研究状态 7
1.2.2国内研究状态 8
1.3 课题主要内容 8
2 高低温压力曲线设计 9
2.1 p-l、Pt-l曲线 9
2.2 高低温压力曲线的设计 10
3 某坦克炮身管强度校核 12
4 液压自紧身管设计 13
4.1假设条件 13
4.2身管液压自紧技术状态 14
4.2.1自紧时的应力状态 14
4.2 .2残余应力 15
4.2.3不出现反向屈服的条件 16
4.2.4修正后特雷斯卡屈服条件的表达式 16
4.3 液压自紧身管毛坯设计 17
4.3.1确定自紧长度 17
4.3.2初步确定自紧身管毛坯结构与尺寸 17
4.3.3调整自紧压力,对初步毛坯进行设计计算 17
4.3.4材料屈服强度、自紧毛坯和自紧压力匹配及液压自紧计算 19
5 身管挠度仿真