反拉深模具结构设计及其数控加工毕业设计.doc

毕业设计说明书 反拉深模具结构设计及其数控加工 办学单位：机械与汽车工程学院 班 级：机械工程及自动化专业 学 生： 指导教师： 提交日期：2010 年 11 月 28 日 摘 要 制造业是国民经济的命脉，机械制造业又是制造业中的支柱与核心。在现代社会生产领域中，计算机辅助设计、计算机辅助制造、计算机辅助管理以及将它们有机地集成起来的计算机集成制造(CIM)已经成为现代企业科技进步和实现现代化的标志。用计算机辅助制造工程技术对我国传统产业进行改造，是我国制造业走向世界、走向现代化的必由之路。在国际竞争日益激烈的今天，作为计算机辅助制造工程技术基础的数控加工技术在机械制造业中的地位显得愈来愈重要。??? 进入20世纪90年代后，国家科委、各工业部门都十分重视先进制造技术的应用，积极鼓励和扶持制造企业采用数控加工技术进行技术改造，提高企业工艺技术水平。经国务院批准，自2000年9月1日起执行的《当前国家重点鼓励发展的产业、产品和技术目录》是国家引导经济结构战略性调整，改善投资结构以及审批投资项目的主要依据之一，其中确定CAD、CAT、CAM、CAE系统，高速、精密数控机床等为国家重点鼓励发展的产品和技术。 关键词：制造业 数控加工 精密技术 Abstract The manufacturing industry is the vitals of national economy, meanwhile, machine manufacturing industry is the support and core of it. In production field of modern society, CAD, CAM, computer aided management and CIM are the symbol of science and technology advancement as well as modernization of modern enterprise. Using CAM engineering to make alternation to our conventional industries is the only way that leas to world and modernization. Nowadays international competition is getting much fiercer, numerical control processing techniques，as the base of CAM engineering, is becoming more and more important in manufacturing industry. In the 1980s, National Commission of Sci. Tech and industrial department attach great importance to application of advanced manufacturing technique, meanwhile, encourage and support the enterprise to carry out reconstruction by adopting numerical control processing technique to improve the technics. Approved by the State Council, “Catalog of industry, product and technique that our nation encouraged to develop” come into force from September 1st 2000, which is the strategic regulation of economic structure and one of the main foundations for improving investment structure as well as examining and approving investment projects. It confirmed that CAD, CAT, CAM,CAE system, high speed precision numerically controlled machi