数控车床主轴传动系统的研究与设计(含CAD图纸+答辩ppt)

数控车床主轴传动系统的研究与设计（开题报告）一、 本课题的研究目的和意义：数控机床是用数控指令来实现一台或多台机械设备动作控制的技术。它广泛应用于机械制造和自动化领域，数控机床的应用不但给传统的制造业带来了革命性的变化，使制造业成为工业化的象征，而且随着数控机床的不断发展和应用领域的扩大，它对国计民生的一些重要行业（IT 汽车 轻工 医疗等）的发展起着越来越重要的作用。二、 文献综述（国内外研究情况及其发展）： 国内数控技术发展现状：我国数控技术起步于20世纪50年代末期，经历了初期的封闭式开发阶段，“六五”、“七五”期间的消化吸收、引进技术阶段，“八五”期间建立国产化体系阶段，“九五”期间产业化阶段，现已基本掌握了现代数控技术，建立了数控开发、生产基地，培养了一批数控专业人才，初步形成了自己的数控产业。但是由于系统技术含量低，产生的附加值少，不具备与进口系统进行全面抗衡的能力，只在低端市场占有，还不能为我国数控产业起到支撑的作用，与国外相比，还有不小的差距。主要问题有以下几方面： (1)技术创新成分低、消化吸收能力不足目前我国数控技术的研究主要还是依照国外开发的一些模 三、本课题的主要研究内容（提纲）和成果形式：本课题主要研究数控车床主轴传动系统；对主轴传动系统中主轴箱进行设计；完成所设计主轴箱的零件图、装配图，分别为A3和A0图纸。四、拟解决的关键问题：1、车床主传动变速系统的设计；主传动功率、运动的调速范围。2、主轴组件的设计；了解主轴主件的性能要求、主轴主件的刚度计算、主轴轴承及其润滑与密封等。1、 五、车床主传动系统分级变速箱的设计： （1）分级变速箱的设计； （2）主电动机恒功率调速范围及额定功率的选定；2、 主轴主件的确定：对主轴主件的性能要求：（1）回转精度（2）刚度（3）抗振性（4）温升（5）耐磨确定主轴主件的类型：（1）只作旋转运动的主轴组件； （2）既有旋转运动又有轴向调整移动的主轴组件； （4）既有旋转运动又有径向进给运动的主轴部件； （5）主轴作旋转运动又做行星运动的主轴部件； (英文文献)STEP-NC The STEP compliant NC Programming InterfaceEvaluation and Improvement of the modern InterfaceAbstractConventional programming of numerical controlled machine tools is generally based on G-Codes (ISO 6983).This sequential programming language does contain simple commands for single movement and switching operations but cannot support more complex geometries or logical structures. Therefore it does no longer satisfy the requirements of modern NC technology. In the ISO standard 14649 (DIS) a new interface has thus been developed for the exchange of information between CAD/CAM systems and NC controllers. Its object-oriented design and the use of data elements of the widely disseminated STEP standard (ISO 10303) support comprehensive bi-directional data exchange whilst using common databases. Furthermore it facilitates the extension of modern NC controls functionality and simplifies NC programming and modification by virtue of its feature-oriented data model. Mainly the separation of operation and geometry and the logical means for working step sequencing in the data model do support a more structured and task oriented NC programming. Within an IMS project the European ESPRIT Project STEP-NC and the US Super Model Project do join in order to validate and to improve the existing data model of ISO 14649 for milling and to prepare models for additional technologies as there are turning, wood and glass cutting, rapid prototyping etc.1 INTRODUCTIONIn modern industrial production the exchange of product data assumes ever-greater significance. Companies that wish to react flexibly, quickly and inexpensively to a new market situation must make information available as soon as possible in all areas, and must ensure that it can also be processed. Data conversions, costly follow-up processing of incomplete data and misinterpretations mean loss of time and consequently of money. Furthermore product quality and productivity also depend on an optimised production. It is thus a common interest of all large companies who are manufacturing and developing on a global scale at various locations to have unified powerful data formats and data interfaces all the way down from the planning to the production. While there are several new formats available for the exchange of geometry (IGES, STEP, etc.), the shop floor still deals with many paper drawings and poor NC programming interfaces, designed more than 40 years ago. Especially the part programming based on ISO 6983, also known as G and M Codes, is a bottleneck and forces the operator to often redo work already done in the planning department. A part programme compliant to ISO 6983 does only contain a small subset of the information available in the CAD/CAM system. Its sequence of simple linear and circular movements and instructions is not sufficient to support more complex machine functionalities, a modern graphical work piece visualisation or the modification of a complex NC programme at shop floor level. By improvements during the last years, a large number of extensions were generated to enable todays numeric controls (NC) to realise powerful advanced functionalities like tilted tools on freeform surfaces or online process control mechanisms. Some of these extensions have been standardised, others are control-, machine tool vendor or en