三维雕刻机毕业设计说明书

1、摘要 电磁式交互电子白板的板体沿 X、Y轴铺设了感应线圈。信号笔前端有电 感线圈，使用时 CPU向板体的感应线圈先发射一段时间与笔中电感线圈谐振 频率相同的电磁波，使笔中的电感电容谐振起来，然后停止发送，板体的感 应线圈切换到接收状态，这时，笔里的电感电容失去外在的推动力，笔中的 谐振波将会产生衰减震荡，同时用板体的感应线圈接收笔所发射的衰减电磁 波，由于电磁耦合，就会在板体的感应线圈上产生感应电动势。这样就在白 板上显示笔所走过的路线，将白板的感应线圈分组分区域，将所得的笔的轨 迹图传给检测电路进行检测，设计就是根据这个原理来进行检测白板系统是 否运作正常及坏点位置的检测。 采用三维雕刻机的

2、结构为原型进行改装， 去掉主轴电机及刀具设备，由三 个步进电机控制滚珠丝杠进给，滚珠丝杠与滑块相连接，Z方向移动部件固 定在X轴的滑块上，而X轴方向的导轨又固定在 Y轴的滑块上，实现三个坐标 轴的同步运行。 关键词：电磁式交互电子白板；感应线圈；信号笔；雕刻机。 I AbstractAbstract Electromagnetic type interactive electronic whiteboard along the X, Y axis laid induction coil. A signal pen in front of inductance coil, when using

3、CPU to the plate body induction coil launch for a period of time and in the same pen inductance coil resonant frequency of electromagnetic wave, so that the pen in the inductor capacitor resonant, then stop sending, the board body induction coil switch to the receiving state, then, the inductance ca

4、pacitance lost pen the external driving force, in the pen Xie Zhenbo will produce the damping vibration, at the same time with the plate body induction coil receives the sum of the emitted the attenuation of electromagnetic wave, due to electromagnetic coupling, will in the plate body on the inducti

5、on coil generates induced electromotive force. This is displayed on the whiteboard pen whiteboard traveled route, the induction coil group area, the pen trajectory plan to pass to the detection circuit to be tested, is designed according to this principle to detect the whiteboard system is functioni

6、ng properly and dead position detection. Using three dimensional engraving machine structure for prototypes were modified, removed from the spindle motor and cutter device, composed of three stepper motor control of ball feed screw, a ball screw is connected with a slide block, Z direction component

7、 is fixed in the X axis and X axis direction of the slide block, the guide rail is fixed on the Y axis on the slider, implementation three axes simultaneous operation. KeywordsKeywords: Electromagnetic interactive electronic whiteboard; Induction coil; Signal pen; Engraving machine. II 目录 摘要 Abstrac

8、tAbstract 第1章绪论 1 1.1电磁式电子白板的概述 1 1.2产品的背景 1 1.3研制产品的功能及使用范围 3 第2章系统分析与方案的订制 4 2.1设计参数 4 2.2总体方案选择 4 2.2.1总体布局要求 4 2.2.2运动分配的影响 5 2.2.3工件的尺寸重量和形状的影响 5 2.3总体方案确定 5 第3章机械部分 9 3.1滚珠丝杠的计算与选择 9 3.1.1轴向载荷 9 3.1.2当量转速 11 3.1.3当量载荷 12 3.1.4预定额定动载荷 13 3.1.5螺纹最大轴向变量及螺纹最小底径的确定 13 3.1.6初选滚珠丝杠副规格代号 14 3.1.7确定滚珠丝

9、杠副的轴承规格代号 14 3.1.8滚珠丝杠的长度确定 15 3.2滚珠丝杠的校核 17 3.2.1抗压刚度 17 3.2.2丝杠支撑副的刚度 18 3.2.3滚珠丝杠滚珠与滚道的接触刚度 18 3.2.4 刚度验算及精度的选择 19 3.2.5验算传动系统的刚度 19 3.2.6验算临界压缩载 20 III 3.2.7验算临界转速 20 3.2.8轴向额定载荷的验算 21 3.2.9确定滚珠丝杠副规格代号 21 3.3步进电机的计算与选择 21 3.3.1作用在丝杠上的转矩 21 3.3.2预加载荷产生的预紧力矩 21 3.3.3转动惯量 212 3.3.4回转件转动惯量 22 3.3.5直

10、线运动件的转动惯量 22 3.3.6启动力矩 23 3.3.7电机的选择 23 3.3.8联轴器的选择 24 3.4直线导轨的选择 25 3.4.1载荷的验算 26 3.4.2寿命的验算 26 第 4 章数控系统设计 28 4.1 确定机床控制系统方案 28 4.2主要芯片配置 29 4.2.1单片机芯片选择 29 4.2.2主要特性 30 4.2.3芯片擦除 32 4.2.4RAM 的选用 33 4.2.5EPROM 的选用 34 4.2.689C51 存储器及 I/O 的扩展 34 4.2.7芯片地址分配 35 4.3键盘设计 36 4.3.1键盘定义及功能 36 4.4显示器设计 37

11、4.4.1显示器显示方式的选用 37 4.4.2显示器接口 37 4.5越界报警电路 37 4.6步进电机接口电路及驱动 38 结论 40 IV 致谢 41 参考文献 42 V CONTENTSCONTENTS AbstractAbstract Chapter1 IntroductionChapter1 Introduction 1 1.1Elect romagnetic white board overview 1 1.2Product background 1 1.3Product development function and range of 3 Chapter2Chapter2Sy

12、stem analysis and scheme of orderSystem analysis and scheme of order 4 2.1Design parameters 4 2.2General options 4 2.2.1Overall layout 4 2.2.2Motion effect of distribution 5 2.2.3Workpiece size influence of weight and shape 5 2.3The overall scheme 5 Chapter3Chapter3Mechanics partMechanics part 9 3.1

13、Ball screw calculation and choice 9 3.1.1Axial load 9 3.1.2Equivalent speed 11 3.1.3Equivalent load 12 3.1.4Predetermined dynamic load rating 13 3.1.5Threads and thread minimum maximum axial variable diameter at the end of Cocking 13 3.1.6Primaries of ball screw pair designation 14 3.1.7Determinatio

14、n of ball screw bearing designation 14 3.1.8Ball screw length to determine the 15 3.2Ball Ehat 17 3.2.1Compressive Gondo 17 3.2.2Screw support pair Gond 18 3.2.3Ball screw ball and raceway contact Gondo 18 3.2.4Rigidity and accuracy of the Xuanze 19 3.2.5Checking transmission system Gondo 19 3.2.6Checking compression Jaiho 20 VI 3.2.7Check critical Chanzov 20 3.2.8Axial load rati