数控铣削中心主传动系统设计论文.doc

2009届机械制造专业毕业设计（论文） PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT I 数控铣削中心主传动系统设计 摘 要 数控技术和数控装备是制造工业现代化的基础,这个基础是否牢固直接影响到一个国家的经济发展和综合国力,关系到国家的战略地位。 数控机床主传动系统是用来实现机床主运动的传统系统,是数控机床的重要组成部分,包括电动机、传动系统和主轴部件。由于转速高、传递的功率大,对主传动系统精度、刚度、噪声、温升、热变形都有严格的要求。 本文通过对数控铣削中心主传动系统进行了分析设计，通过对三种无级变速传动方案的设计、分析，选择出简化变速箱及其自动操作机构的主变速系统，该系统选择了交流变频调速电动机，利用串联一个二级变速箱办法，扩大了电动机的恒功率调速范围，使整个主传动系统满足该机床所需要的转速范围。并对主轴的支承轴承、刀具自动装卸及切屑清除装置和主轴定向停止等结构进行了设计。利用CAD软件绘制了主轴箱展开图和主轴箱装配图。 关键词：主传动系统；传动方案；数控铣削中心；主轴 Design of main drive system in CNC milling center Abstract The numerical control technology and the numerical control equipment are the factory industry modernization foundations,does this foundation whether reliable immediate influence to a country’s economic development and the comprehensive national strength,relate the country thestrategic position. CNC machine tool main drive system is used to achieve the main movement of legacy systems is an important part of CNC machine tools, including the motor, transmission and spindle assembly. As high speed, transmission power, the main transmission accuracy, rigidity, noise, temperature, heat distortion, there are stringent requirements. This paper analyzes the design of the main drive system of CNC milling center, through the analysis of design, three kinds of continuously variable transmission scheme selection of main transmission system, a simplified gearbox and its automatic operation mechanism, the system adopted the AC frequency conversion speed regulating motor, used in series with a two transmission way, expand the constant power speed range of motor, the main transmission system of machine tool is needed to meet the speed range. And bearing, automatic loading and unloading tool and cutting structure of spindle dust removing device and oriented spindle stop are designed. Use CAD software to draw the spindle box diagram and spindle box assembly drawing. Keywords：Main drive system