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text-indent: 0pt;">第一章绪论</span></span></p> <p class="NewStyle20" style="margin: 0pt 0pt 5.3pt; text-indent: 0pt; page-break-after: avoid; line-height: 14pt;"><span style="font-size: small;"><span class="18" style="font-family: 宋体; letter-spacing: 2pt;">1.</span><span class="18" style="font-family: 宋体; letter-spacing: 2pt;">1课题背景</span></span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 14pt;"><o:p></o:p></span></p> <p class="NewStyle21" style="margin-top:0.0000pt; margin-right:0.0000pt; margin-bottom:0.0000pt; margin-left:0.0000pt; text-indent:26.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; "><span style="font-size: small;"><span style="font-family: 宋体; letter-spacing: 0pt;">目前世界上主要的制造业强国对先进制造技术的投入不断地加强，高速加工、精 密制造等先进技术的应用日益增多，柔性系统的快速发展，超大规模集成电路功能的 不断增强对数控加工技术水平提出了更加紧迫的时代要求</span><span style="font-family: 宋体; letter-spacing: 0pt; vertical-align: super;">[1</span><span style="font-family: 宋体; letter-spacing: 0pt;">?</span><span style="font-family: 宋体; letter-spacing: 0pt; vertical-align: super;">5]</span><span style="font-family: 宋体; letter-spacing: 0pt;">。机床的热误差是机床 误差的重要组成部分，有研宄表明，机床的热误差占到总误差的30%—50%[</span><span style="font-family: 宋体; letter-spacing: 0pt; vertical-align: super;">6</span><span style="font-family: 宋体; letter-spacing: 0pt;">]，这主要 是主轴单元和滚珠丝杠的热变形误差。随着机床的高速化，滚珠丝杠伺服进给系统的 热误差越来越影响机床的定位精度与加工精度。</span></span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p class="NewStyle21" style="margin-top:0.0000pt; margin-right:0.0000pt; margin-bottom:43.6500pt; margin-left:0.0000pt; text-indent:26.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; "><span style="font-size: small;"><span style="font-family: 宋体; letter-spacing: 0pt;">数控机床伺服进给系统的结构组成如图</span><span style="font-family: 宋体; letter-spacing: 0pt;">1.1</span><span style="font-family: 宋体; letter-spacing: 0pt;">所示，主要包括：编码器、电机、联 轴器、滚珠丝杠副、支撑轴承组、光栅尺、导轨、工作台等。其工作原理是将伺服电 机的旋转运动通过滚珠丝杠副转化为工作台的直线进给运动，进行工件切削加工。</span></span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 1pt;"><o:p></o:p></span></p> <p class="NewStyle21" style="margin-top:0.0000pt; margin-right:0.0000pt; margin-bottom:43.6500pt; margin-left:0.0000pt; text-indent:26.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; "><span style="font-size: small;"><span style="font-family: MingLiU; letter-spacing: 0pt;">在滚珠丝杠进给系统中，热源主要包括丝杠滚道与滚珠、滚珠与螺母滚道的摩擦 热、滚珠与支撑轴承内外圈的摩擦热，伺服电机发热传递到丝杠上的热，环境的辐射 热等。其中滚珠丝杠的摩擦热占很大的比重，尤其在高速进给条件下，摩擦发热更加 严重，这会使滚珠丝杠产生轴向热伸长。如图</span><span style="font-family: MingLiU; letter-spacing: 0pt;">1.2</span><span style="font-family: MingLiU; letter-spacing: 0pt;">所示，一方面这会导致了工作台 的定位精度的下降，影响了工件的加工精度；另一方面从热伸长导致丝杠拉伸刚度降 低的角度看，较大的刚度的降低也会使系统的固有频率降低，影响了伺服系统的快速 响应性。</span></span></p> <p class="NewStyle21" style="margin-top:0.0000pt; margin-right:0.0000pt; margin-bottom:43.6500pt; margin-left:0.0000pt; text-indent:26.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; "><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“空心滚珠丝杠在数控机床伺服进给系统中的应用研究”，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></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> <a href='/index.php?case=tag&act=show&tag=%E6%95%B0%E6%8E%A7%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>数控加工中心</a> <a href='/index.php?case=tag&act=show&tag=CNC%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>CNC加工中心</a> <a href='/index.php?case=tag&act=show&tag=%E6%95%B0%E6%8E%A7%E6%9C%BA%E5%BA%8A' target='_blank'>数控机床</a> <a href='/index.php?case=tag&act=show&tag=%E6%BB%9A%E7%8F%A0%E4%B8%9D%E6%9D%86' target='_blank'>滚珠丝杆</a> <!-- 分类 --> <div class="blank10"></div> 分类： <a href='/bethel/type/jnc/type-1.html' target='_blank'>加工中心</a> <div class="blank30"></div> <!--自动调用自定义字段--> <div class="blank20"></div> <div class="blank30"></div> <!-- 投票 --> <script src="/index.php?case=vote&act=view&aid=1004"></script> <!-- 自定义表单开始 --> <!-- 自定义表单结束 --> <div class="blank60"></div> <!-- 上下页开始 --> <div id="page"> <strong>上一篇</strong><a href="/bethel/news/show_1003.html">振动对数控机床进给系统爬行的影响-结论与展望</a> <div class="blank10"></div> <strong>下一篇</strong><a href="/bethel/news/show_1005.html">国外滚珠丝杠热特性的研宄现状</a> </div> <!-- 上下页结束 --> </div><!-- /container --> <!-- 相关文章开始 --> <div class="blank60"></div> <!-- 页面标题开始 --> <div class="title"> <h3><a><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> <a 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