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font-size: 10.5pt;">1.2</span><span style="line-height: 30.7pt; text-indent: 0pt; font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">课题研宄目的和意义</span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 0pt; line-height: 30.7pt;"><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">1.2.1</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">课题研究的目的</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 21.85pt;"><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">数控机床可以加工复杂型面、加工精度高、质量稳定、有利于现代化生产。机床各 部件相互配合，最终共同完成机械执行机构的移动、转动、夹紧、松开、变速和换刀等</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 0pt; line-height: 21.85pt;"><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">各种动作来实现切削加工的任务</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt; vertical-align: super;">[2]</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">。数控机床在低速运动或重载情况下出现爬行时，会 破坏数控机床运动的准确性、均匀性，影响数控机床的定位精度和加工精度，甚至产生 废品和事故，这对企业来说是不可估量的损失。根据数控机床出现爬行的现象机理分析 后，能够发现导致爬行的因素有很多，在机械传动部分中，由摩擦引起的振动对爬行的 影响是比较大的，故研宄振动对数控机床进给系统爬行的影响对减少爬行发生的几率和 提高数控机床的精度有很大帮助。</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 0pt; line-height: 11pt;"><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">1.2.2</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">课题研宄的意义</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 21.85pt;"><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">目前，德国、美国和日本等发达国家的数控机床质量及性能良好，先进实用。尤其 在大型、重型和精密数控机床方面发展要比我国快很多。我国的数控机床在稳定性、可 靠性和无故障方面和外国高档数控机床相比还有一定的差距。若能改善数控机床在低速 行进时产生的爬行，我国数控机床将步入新的层次。数控机床的爬行问题是提高数控机 床加工精度的重要课题之一，也是国民经济、科学研宄及国防建设的重要课题。研究振 动对爬行现象的影响，对揭示爬行的内在规律、分析机床低速运动时的平稳性和探寻新 的领域来解决爬行的措施都是必不可少的。本课题研宄的内容对数控机床发展的意义主 要表现在四个方面：</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 21.85pt;"><!--[if !supportLists]--><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">(1) </span><!--[endif]--><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">提高数控机床精度。研宄爬行机理、导致产生爬行产生的各种因素和防爬措施 是找到抑制爬行新方法的前提，根据抑制爬行的新方法，会进一步提高数控机床的精度 等级。</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 21.85pt;"><!--[if !supportLists]--><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">(2) </span><!--[endif]--><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">节省成本。利用</span><span class="18" style="font-family: Georgia; letter-spacing: 0pt; font-size: 10.5pt;">ADAMS</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">软件分析外加振动和</span><span class="18" style="font-family: Georgia; letter-spacing: 0pt; font-size: 10.5pt;">PID</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">控制系统对爬行的影响，可 以在</span><span class="18" style="font-family: Georgia; letter-spacing: 0pt; font-size: 10.5pt;">View</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">虚拟界面中真实地模拟系统的运动，由于简化后的爬行系统模型相对比较简单， 可以直接在</span><span class="18" style="font-family: Georgia; letter-spacing: 0pt; font-size: 10.5pt;">View</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">中建模，然后不断修改设计缺陷以改进系统，直到获得最满意的设计方 案，最终能够做出比较理想的物理样机。所以在</span><span class="18" style="font-family: Georgia; letter-spacing: 0pt; font-size: 10.5pt;">ADAMS</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">平台中直接对爬行的仿真模型 进行分析，节约了大量在现实生活中加工样机、改进样机的时间和成本，给企业增加了 利润。</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 21.85pt;"><!--[if !supportLists]--><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">(3) </span><!--[endif]--><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">改善劳动环境。数控机床在重载时出现爬行，前期机床运动不平稳时会产生噪 音，对声音造成环境污染，对劳动者身体有伤害。</span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 21.85pt;"><!--[if !supportLists]--><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">(4) </span><!--[endif]--><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;">延长机器使用寿命。机床导轨出现严重爬行时，会导致机床丧失加工能力，产 生废品、造成停机现象，对数控机床损害严重。</span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 21.85pt;"> </p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 21.85pt;"><span style="font-size:9.0pt;font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";mso-bidi-font-family: "Times New Roman";mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language: ZH-CN;mso-bidi-language:AR-SA">本文采摘自“振动对数控机床进给系统爬行的影响”，因为编辑困难导致有些函数、表格、图片、内容无法显示，有需要者可以在网络中查找相关文章！本文由伯特利数控整理发表文章均来自网络仅供学习参考，转载请注明！</span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 21.85pt;"><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p></div> <div class="blank30"></div> <!-- tag --> <div class="blank10"></div> 标签： <a href='/index.php?case=tag&act=show&tag=%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>加工中心</a> 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