摘要:本文对圆柱传动齿轮的刀具以及加工工艺路线进行了设计。其中包括了刀具参数的设计，夹具设计，工艺分析，工艺要求，确定毛坯的制造形式，确定定位基准，粗基准的选择，精基准选择的原则，确定各表面加工方案，零件表面的加工方法的选择，提高齿轮的加工精度，工艺路线的拟定，工序的合理组合，加工阶段的划分，工艺路线，确定齿轮的偏差，机械加工余量及毛坯尺寸，毛双联坯形状、尺寸确定的要求，确定机械加工余量，确定毛坯尺寸，设计毛坯图，工序设计，选择加工设备，确定工序尺寸。机械制造工艺规程的制定需选择机械加工余量，加工余量的大小，不仅影响机械零件的毛坯尺寸，设备的调整，材料的消耗，切削用量的选择。先锻件成型后进行表面热处理(正火、淬火、回火等)此次设计的主要内容在于如何使加工工序简单化、降低加工难度。46877

毕业论文关键词 ：工艺路线；工序；定位基准；加工余量

Tool design for machining cylindrical spur gears

Abstract：In this paper, the cutting tool and machining process of cylindrical gear transmission gear are designed. Including the tool parameters design, fixture design, process analysis, process requirements determined the manufacture of blank shape, determines the localization datum, the choice of benchmark crude, fine basic selection principle determined the surface processing scheme, parts of the surface of the processing method of choice, provided high gear machining precision, craft route formulation, a reasonable combination of the process, pision of stages of processing, process route, determine the gear deviation, mechanical machining allowance and blank size, hair double blank shape and size to determine the requirements determined machining allowance, determine the semifinished materials size, blank design, process design, processing equipment, determine the size of the process. Machinery manufacturing process planning need to select the mechanical machining allowance, the size of the machining allowance, not only affect the blank size of mechanical parts, equipment adjustment, material consumption, cutting the amount of choice. First forming forging parts after surface heat treatment (normalizing, quenching and tempering, etc.) the design of the main content is how to simplify the process of machining, reduce the difficulty of processing.

Key words: process route；positioning datum；machining allowance

目录

摘要  1

1 绪论4

1.1 背景意义4

1.2 课题意义4

 1.3 国内发展现状6

1.4 齿轮刀具的市场发展趋势6

2 圆柱齿轮工艺设计9

2.1 零件工艺性分析9

2.2 圆柱齿轮的技术要求及其参数10

2.2.1 审查圆柱齿轮的工艺性 10

2.3 确定圆柱齿轮的生产类型 11

2.3.1 机械加工工艺规程设计 11

2.4  确定各表面加工方案12

2.4.1 在选择各表面及孔的加工方法时，要综合考虑以下因素12

2.4.2 零件表面加工方法的选择13

2.5 拟定圆柱齿轮工艺路线 13

2.5.1 定位基准的选择13

2.6 加工阶段的划分 14

2.7 工序顺序的安排 14

2.8  确定工艺路线 15

3.刀具设计18

 3.1 刀具的分类18

 3.2 刀具的结构18

3.3 刀具的材料19

3.4 刀具材料的选择 20

3.5 刀具设计20

3.5.1 刀具结构设计的普遍原则 20

3.5.2 零件主要参数的确定 21

3.5.3 共轭齿轮主要参数的确定 22

3.5.4 刀具的设计和主要参数计算 22

4 夹具设计31

4.1 夹具设计要求31

4.2 夹具设计31

4.2.1 定位基准的选择32