【2017年整理】数控机床的结构经典课件.ppt

第四章 数控机床的机械结构;§4-1对机械结构的要求;1、数控机床应具有更高的静、动刚度;（2）提高刚度的措施;（2）提高刚度的措施;（2）提高刚度的措施;（2）提高刚度的措施;（2）提高刚度的措施;措施3 增加导轨与支承件的连接部分的刚度;措施4 增加机床各部件的接触刚度和承载能力;合理的结构布局;合理的结构布局;采用补偿变形的措施;合理选用构件的材料;措施2 采用封砂床身结构;人造大理石床身（混凝土聚合物）;天然大理石床身;一、数控机床的机械结构要求;进行热变形补偿;主轴;主轴;对称结构立柱;措施2 使机床主轴的热变形发生在刀具切入的垂直方向上;机床排屑系统;倾斜床身;措施4 将热源置于易散热的位置;3、减少运动副的摩擦，提高传动精度;滚珠丝杠螺母副+滚动导轨副;5、自动化的机构、宜人的操作性;一、数控机床的机械结构要求;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;二、对主传动的要求;3、主传动的配置方式;电主轴;主轴电动机;3、电动机经齿轮变速传动主轴;4、主轴部件;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;三、对进给传动系统的要求;3、对进给传动系统的要求;机床爬行现象一般发生在低速度、重载荷的运动情况下 当主动件1作匀速运动时，被动件3往往会出现明显的速度 不均匀，产生跳跃式的时停时走的运动状态，或时快时慢 现象;3、对进给传动系统的要求;3、对进给传动系统的要求;§4-2数控机床典型机械结构;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;二、自动换刀装置;对自动换刀装置的 基本要求;1、回转刀架换刀;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;回转刀架换刀;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;3、更换主轴箱换刀;4、带刀库的自动换刀系统;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;三、刀库;三、刀库;盘式刀库;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;三、刀库;三、刀库;三、刀库;三、刀库;三、刀库;龙门加工中心;三、刀库;三、刀库;