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style="line-height: 13pt; text-align: justify; background-color: transparent;">课题研究的目的及意义</span></p> <div class="Section1"> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:23.3pt;mso-line-height-rule: exactly;background:transparent"><span class="2">对数控机床进行故障预警是提高数控机床可靠性的方法之一，国内在此方向的研 究还处于初步阶段，还没有形成系统的理论和规范。进行数控机床的故障预警是一个 系统性的工作，需要大量的故障数据支持。由于当前国内数控机床的</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 11.5pt;">MTBF</span></span><span class="2">低于国外 平均水平<sup>[22][23][24]</sup>，因而故障信号数据采集周期长、试验成本高、机床用户企业配合起 来有难度。对于机床主机厂商来说，一般只会在机床出厂时进行一部分简单的质量检 测工序，并不会在出厂时做大量的状态监测和故障预警工作，也无法将相应的故障预 警程序写入到数控程序中，客观上也无法做到对每一台售出的机床进行跟踪和故障数 据采集。</span><span style="font-size: 9pt;"> </span></p> <p class="21" align="left" style="margin: 0cm 0cm 0.0001pt; text-indent: 26pt; line-height: 23.3pt; background: transparent;"><span class="2">数控机床关键功能部件作为数控机床中重要的组成部分，其可靠性高低直接关系 到整机的性能。但数控机床关键功能部件的工作时间和主机有很大的区别，例如刀架、 刀库换刀系统等在机床整体运行周期中只占很小一部分，而机床</span><span class="2TimesNewRoman"><span lang="EN-US" style="font-size: 11.5pt;">MTBF</span></span><span class="2">是以整机为单 位进行估计的，因此关键功能部件发生故障的周期是很长的。而进行故障预警工作， 首先需要对功能部件的故障信号进行分析，找出发生故障前后的特征信号，然后才能 进行预警。对于此类故障，可以在实验室对关键功能部件连续的进行试验，从而缩短 了故障周期，提升了故障信号的获取效率。</span></p> </div> <p><span style="font-size:11.0pt;font-family:"Times New Roman";mso-fareast-font-family: "Times New Roman";mso-ansi-language:#0400;mso-fareast-language:#0400; mso-bidi-language:AR-SA"><br clear="all" style="page-break-before:always; mso-break-type:section-break" /> </span></p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:23.3pt;mso-line-height-rule: exactly;background:transparent"><span class="2">加工中心盘式刀库换刀系统的故障率较高，但故障模式较为单一。通过实验室连 续试验激发故障，对所采集的故障前后信号特征进行处理分析，获取故障特征值，从 而实现故障预警，即在故障信号出现而故障未发生时发出报警提示。本文旨在提出一 种有效的故障预警方法，并在实验室条件下验证其可行性。</span></p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:23.3pt;mso-line-height-rule: exactly;background:transparent"> </p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:23.3pt;mso-line-height-rule: exactly;background:transparent"> </p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:23.3pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: 9pt; line-height: normal; text-align: start; text-indent: 0px; font-family: 宋体;">本文采摘自“加工中心盘式刀库换刀系统的故障预警方法研究”，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><span lang="EN-US" style="font-size: 9pt; line-height: normal; text-align: start; text-indent: 0px;"> </span></p></div> <div class="blank30"></div> <!-- tag --> <div class="blank10"></div> 标签： <a 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