数控机床与编程课程设计论文.docx
数控机床与编程课程设计论文 数控机床与编程课程设计说明书设计题目： 成绩： 班级：09级机械三班 学号： 04092317 姓名：于明鑫 指导教师：于春海 设计日期2022年6月18日至2022年6月24日 目录 封面.错误！未定义书签。课程设计任务书 . (4) 绪论 ················································································· 1.零件图分析 ······················································································ 2.零件总体工艺分析 ··················································错误！未定义书签。 2.1 选毛培····························································错误！未定义书签。 2.2 加工工艺路线···················································错误！未定义书签。 3.零件加工工艺过程卡 ···············································错误！未定义书签。 4.确定数控加工内容··············································错误！未定义书签。 5.正面铣削数控加工设计·······································错误！未定义书签。 5.1 制定工序2的加工步骤·······································错误！未定义书签。 5.2 确定装夹方案···················································错误！未定义书签。 5.3确定数控铣床 ···················································错误！未定义书签。 5.4 确定数控铣削刀具·············································错误！未定义书签。 5.5编程相关坐标点设定 ··········································错误！未定义书签。 5.6 确定切削用量···················································错误！未定义书签。 5.7 刀具轨迹坐标值的数学处理 ································错误！未定义书签。 5.8 程序编制及说明················································错误！未定义书签。 6.背面铣削数控加工设计·······································错误！未定义书签。 6.1 制定工序3的加工步骤·······································错误！未定义书签。 6.2 确定装夹方案···················································错误！未定义书签。 6.3 确定数控铣削刀具·············································错误！未定义书签。 6.4编程相关坐标点设定 ··········································错误！未定义书签。 6.5 确定切削用量···················································错误！未定义书签。 6.6 刀具轨迹坐标值的数学处理 ································错误！未定义书签。 6.7 程序编制及说明················································错误！未定义书签。 7.程序输入及机床操作 ··········································错误！未定义书签。 7.1 程序输入及调试················································错误！未定义书签。 7.2 程序校验·························································错误！未定义书签。 7.3 机床操作·························································错误！未定义书签。设计总结·································································错误！未定义书签。参考文献·································································错误！未定义书签。 课程设计任务 设计要求： 1、数控加工编程任务书； 2、数控加工工序卡、数控刀具卡片和数控刀具明细表； 3、夹具方案图和刀具进给路线图； 4、根据零件平面图建立零件三维模型； 5、至少编制一个工步的加工程序； 6、编写设计说明书（不少于20页） 绪论 数控加工工艺是数控编程与操作的基础，合理的工艺是保证数控加工质量、发挥数控机床有效能的前提条件。本设计正是从数控加工的实用角度出发，以数控加工的实际生产为基础，以掌握数控加工工艺为目标，在结合数控加工切削基础、数控机床刀具的选用、数控加工工件的定位与装夹以及数控加工工艺基础等基本知识上，分析了具体零件在加工中心上的加工工艺。 本次数控加工工艺的课程设计，我们根据具体零件加工图样进行工艺分析，确定加工方案、工艺参数和夹具。用规定的程序代码和格式编写零件加工程序单；用自动编程软件或手工编程。通过数控仿真软件对程序和刀具走刀路径进行模拟仿真。用UG来画出工件和夹具的三维图并装配好供分析使用。制作工艺时还对工艺卡片进行制作。在本次工艺中，粗加工时，要以提高生产效率，但同时应考虑到经济性和加工成本，对于半精加工和精加工，应首先保证加工质量，同时兼顾切削效率，经济和加工成本，要选择合适的参数在最短时间内加工出精度较高的工件和设计出适当的工艺卡。 本工艺设计由我自己独自编写，在编定过程中参阅了很多有关工艺设计手册、教材和网上资料等资料与文献，并得到指导老师的帮助，在此表示衷心的感谢。由于时间仓促，编者水平有限,调查研究不够深，实际工作经验少,本设计中难免仍有很多缺点和错误,我们恳切希望老师批评指正。 1.零件图分析 如图所示为零件简图。该零件的材料45钢，中小批生产，无热处理工艺等其他要求。 需加工平面和孔，依靠铣床即可完成。 2.零件总体工艺分析 2.1选毛培 毛坯分为铸件、锻件、型材、焊接件和冷冲压件。铸件适用于形状较复杂的零件，毛坯；锻件适用于强度要求高、形状比较简单的毛坯；型材有热轧和冷扎两种。热轧适用于尺寸较大、精度较低的毛坯。冷拉适用于尺寸较小、精度较高的毛坯；焊接件是根据需要将型材或钢材等焊接而成的毛坯件；冷冲压件可以加工接近成品的工件。该零件的材料为S136-SUP（HRC52-54），S136是镜面防锈模具钢，具良好抛旋光性能(镜面加工)和良好的耐磨性和韧性，高温下具良好塑性，因其含铬量高(13.6%)故其抗腐蚀性极佳。因工件形状为比较规则的方形，选用S136方钢作为毛坯，可有效较少材料消耗，机械加工的劳动量也越少，因而会提高机械加工效率，降低成本。 零件其形状为长方体，刚性好，可以直接按零件尺寸再加1-2mm切割毛胚。 长方体毛培，尺寸为154*190*28mm 本课程设计零件属于数控铣削加工设计，主要包含平面、圆形孔和曲面。具体分析如下：因工件形状为比较规则的方形，选用S136方钢作为毛坯，可有效较少材料消耗，机械加工的劳动量也越少，因而会提高机械加工效率，降低成本。由图纸可知，零件的外形尺寸为150*85*25mm，毛坯的总体尺寸比较小，考虑到一定的加工余量，从标准中选择厚度为28mm的钢板，长宽方向比成品大12mm 即可，采用机械切割下料。 2.2工艺分析 本课程设计数控铣削加工设计，主要包含螺纹孔，铣零件表面等 2.3加工工艺路线 下料-铣削表面-钻孔-检验-入库
