第三节 多工位级进模典型结构 第四节 多工位级进模主要零部件的设计

第一节 概述 第二节 冲裁模零件制造与装配

模块四数控铣床与操作 数控铣床认识项目→ 项目一数控铣床特点→ 项目二数控铣床分类→ 项目三数控铣床主要加工对象→ 项目四数控铣床主要技术参数→

模块ニ数控机床结构及主要部件 数控机床认识项目→ 项目一数控机床组成→ 项目二数控机床结构性能与布局特点 数控机床了解项目→ 项目一数控机床坐标系→ 项目二数控系统→ 项目三数控机床的主传动系统→ 项目四数控机床的进给传动系统→ 项目五检测装置→

模块ニ数控机床结构及主要部件 项目三数控机床的主传动系统 一、主传动系统作用 产生主切削力 二、对主传动系统的要求 1.足够的转速范围 2.足够的功率和扭矩 3.各零部件应具有足够的精度、强度、刚度和抗振性 4.噪声低、运行平稳

模块三数控车床与操作 数控车床认识项目→ 项目一数控车床特点→ 项目二数控车床分类→ 项目三数控车床主要加工对象→ 项目四数控车床主要技术参数→

Space Policy Seminar#1 What is space policy? Who makes it and Why is it important? Outlineo Definitions Technical statement and limits A simple model for space policy statements

UNCLASSIFIED Unclassified Sources of Space Policy and Law Custom Domestic and International Laws Treaties and Agreements Policy Statements and Directives -Presidential DoD and The Armed Services Other Government Or

Who is in the Space Enterprise and what are their roles? Reading A. US National Space Policy, http://www.whitehouse.gov/wh/eop/osTp/htmL/ostpHomehtml B.DodSpacePolicyhttp://www.c3i.osd.mil/org/c3is/spacepol/index.html C.Nrohomepagehttp://www.nro.mil D.Nasahomepagehttp://www.nasa.gov/enterprises.html

History and Policy in the sixties Reading 1. Spaceflight and the Myth of Presidential Leadership?\Chapters 2&3 2.“ The Heavens and the earth” Chapters 11-22 3.“ Beyond Horizons” Chapter3 Strategic themes The use of the Space Program as a political tool to show the superiority of the