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1、ached)andon-timecontrolproblems;severitygreaterrisk,accordingtotherequiredtroubleshooting,registrationform,andsignedbythoseresponsibleforthesecurityoftheunitforthefirstafterescalation.Thirdarticleopenminemanageroncoalmineproductionjobdistrictwithinofsecurityhiddentroubleshooting,andgovern
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4、onnelbeforetakingoverandshiftbeforethejurisdictionareatoconductacomprehensiveinspectionofequipment,runningthesquadlea第二章数控机床的机械结构第一节概述数控机床机械部分如图2－1，数控机床是高精度和高生产率的自动化机床，其加工过程中的动作顺序、运动部件的坐标位置及辅助功能，都是通过数字信息自动控制的，操作者在加工过程中无法干预，不能像在普通机床上加工零件那样，对机床本身的结构和装配的薄弱环节进行人为补偿，所以数控机床几乎在任何方面均要求比普通机床设计得更为完
5、善，制造得更为精密。为满足高精度、高效率、高自动化程度的要求，数控机床的结构设计已形成自己的独立体系，在这一结构的完善过程中，数控机床出现了不少完全新颖的结构及元件。与普通机床相比，数控机床机械结构有许多要求：●性能要求高●电机过载能力强。要求有较长时间(1－30min)和较大倍数的过载能力●在断续负载下，电机转速波动要小。●速度响应要快，升降速时间要短。●电机温升低，振动和噪音小。●可靠性高，寿命长，维护容易。●体积小，重量轻，与机床联接容易。图2－1数控机床机械结构部分第二节数控机床机械结构特点一．主轴传动系统特点主轴传动链大大缩短，变速范围大大扩大。1.普通电机—机
6、械变速系统—主轴部件结构如图2－2derondutyduringmajorequipmentoverhaul,beforeandaftertheshifttodesignatedstafftounderstandtheoperationofequipmentintheequipmentandcheckonfocus.2,equipmentrepairequipmenttoselectmaintenancecheckatleasttwiceaweektokeyequipmentanddefectivedevicestoincreasethefrequencyofinspec
7、tion.Teamleaderdedicatedtothedeviceeverydayoperationofalldeviceswithinthescopeofmaintenancepersonnelunderstandthemaintenanceandinspectionofkeyequipment.Paragraph3,theownerandprofessionalandtechnicalpersonnelshouldbecarriedoutdailyafterworksitevisitinspection...Eveni
