数控车床零件加工及工艺设计毕业论文(DOC 28页)

数控车床零件加工及工艺设计毕业论文(DOC 28页)

毕业论文论文题目：数控车床零件加工及工艺设计

题目：数控车床零件加工及工艺设计

班级：

专业：

学生姓名：

指导教师：

日期:

数控车床零件加工及工艺设计

摘要

在车床上，利用工件的旋转运动和刀具的直线运动或曲线运动来改变毛坯的形状和尺寸，把它加工成符合图纸的要求。

车削加工是在车床上利用工件相对于刀具旋转对工件进行切削加工的方法。车削加工的切削能主要由工件而不是刀具提供。车削是最基本、最常见的切削加工方法，在生产中占有十分重要的地位。车削适于加工回转表面，大部分具有回转表面的工件都可以用车削方法加工，如内外圆柱面、内外圆锥面、端面、沟槽、螺纹和回转成形面等，所用刀具主要是车刀。

在各类金属切削机床中，车床是应用最广泛的一类，约占机床总数的50%。车床既可用车刀对工件进行车削加工，又可用钻头、铰刀、丝锥和滚花刀进行钻孔、铰孔、攻螺纹和滚花等操作。按工艺特点、布局形式和结构特性等的不同，车床可以分为卧式车床、落地车床、立式车床、转塔车床以及仿形车床等，其中大部分为卧式车床。

数控车削加工是现代制造技术的典型代表，在制造业的各个领域如航天、汽车、模具、精密机械、家用电器等各个行业有着日益广泛的应用，已成为这些行业不可或缺的加工手段。

为了子数控机床上加工出合格的零件，首先需根据零件图纸的精度和计算要求等，分析确定零件的工艺过程、工艺参数等内容，用规定的数控编程代码和格式编制出合适的数控加工程序。编程必须注意具体的数控系统或机床，应该严格按机床编程手册中的规定进行程序编制。但从数控加工内容的本质上讲，各数控系统的各项指令都是应实际加工工艺要求而设定的。

由于本人才疏学浅，缺乏知识和经验，在设计过程中难免出现不当之处，望各位给予指正并提出宝贵意见。

关键词：

车削加工刀具零件的工艺过程工艺参数程序编制

On the lathe, use the rotation of the workpiece and tool of line or curve movement to change the shape and size of rough, meet the requirements of drawings processing it into. Turning on a lathe is used the workpiece relative to the method of cutting tool rotation on the workpiece. Cutting is mainly composed of workpiece in turning rather than the tool provided. Turning is the most basic and most common method of cutting, occupies a very important place in production. Turn Rotary surface suitable for cutting, most with turning method for Rotary surface of workpieces can be processed, such as inner and outer cylinder and inner and outer taper, surfacing, Groove, screw and Rotary forming surface, the tool is mainly used tools. In all kinds of metal-cutting machine tools, lathe is the most widely used category, per cent of the total number of machine tools 50%. Turning the

lathe tool available on the workpiece, and drills, reamers, taps and knurling cutter drilling, reaming, tapping and rolling flower, and so on. Technical features, layout, forms and structure characteristics of different lathes can be divided into horizontal lathe, face lathe, vertical lathes, Turret Lathes, and contouring lathe, horizontal lathe with most of them. CNC turning process is typical of modern manufacturing technology, in all areas of manufacturing industries such as aerospace, automotive, molds, precision machinery, household appliances, increasing use of a variety of industries, has become an integral part of these industries processing means. To CNC processing qualified parts, first as well as their precision and calculations required under part drawings, analysis of technological parameters of part of the process, content, NC programming code and format provided a suitable CNC machining program. Programming must pay attention to specific or machine tool numerical control system, should be conducted in strict accordance with the provisions of machine tool programming manual programming. But in essence of NC content, the numerical control system of the instruction set is the actual process requirements. Since I have little talent and learning, lack of knowledge and experience of inevitable irregularities during the design process, hope you give correct me and all of your comments.

Key words: turning process parameters of technological process of the tool part programming

一．数控机床的简介

数控机床是一种用电子计算机和专用电子计算装置控制的高效自动化机床。主要分为立式和卧式两种。立式机床装夹零件方便，但切屑排除较慢；卧式装夹零件不是非常方便，但排屑性能好，散热很高。数控铣床分三坐标和多坐标两种。三坐标机床（X、Y、 Z）任意两轴都可以联动，主要用于加工平面曲线的轮廓和开敞曲面的行切。多坐标机床是在三坐标机床的基础上，通过增加数控分度头或者回转工作台，成为4坐标或