发动机缸体双面扩孔组合机床总体设计及右主轴箱设计

摘要：本课题设计的是发动机缸体双面扩孔组合机床，此机床是对发动机缸体零件的两侧面六个孔进行扩孔加工。

本次设计的组合机床主要由总体设计和右主轴箱的设计两部分构成。第一部分主要是对机床的配置形式进行确定、选择机床设计的结构方案，对所设计的机床进行三图一卡绘制。第二部分的右主轴箱设计包括绘制主轴箱设计原始依据图、确定主轴和齿轮、完成动力计算、设计传动系统、绘制主轴箱装配图和零件图。在进行组合机床总体设计时，第一步是对发动机缸体零件进行分析，应根据发动机缸体两侧面上6个孔的位置精度、表面粗糙度及其他技术要求，拟订总体方案。本次所需加工的发动机缸体零件是需要大量生产的，在对第二部分进行设计的时候，需要考虑装夹引起的误差问题。考虑到孔比较多，需要把原来的单孔加工改为多孔加工。

本次设计的机床，是用来对发动机缸体零件进行加工的机床，具有实际的意义与价值。

关键词:组合机床；零件加工；右主轴箱设计

Design of General and Rear Headstock of Modular Machine Tool for Enlarging Holes on Cylinder Body

Abstract:This subject comes from Jianghuai power group, engine cylinder block is the one of the products of mass productioninJianghuai. This issue is the design ofaggregated machine tool surface for enlargingsixholes on two-side of cylinder diesel,Theaggregatedmachine tool is used to enlarge6 holes, which are on the left and right surfaces.

The important point of this topic is the system design and the right headstock design.In the first partincludes the definite of theaggregated machine tool, the selecting of the structure plan and the drawing of “three pictures and one card”. The right headstock design includes drawing the primitive basic chart for the headstock, determining the system, drawing the headstock assembly drawing and thepart processing chart.Conducting modular machine to system design,first engine cylinder block’sleft and right surface enlarging 6 holes accuracy of the location, surface roughness, and other technical requirements,develop overall program.The headstock is a product which needs maspindle and the gears, completing the power computation, designing the transmission s production. Headstock in the design, the design is the main ideas from the original multi-channel process to the processing of porous single hole while processing, this design is mainly to solve the fixture by the time the positioning error caused the problems to ensure the accuracy of the location of holes.

Thisaggregated machine tool for enlarging holes on cylinder body design comes from Jianghuai power group. This design has much actual meaning and value.

Key word:Aggregated machine tool; Part manufacturing;Right headstock design

1绪论1

1.1组合机床的特点分析1

1.2组合机床的加工范围1

1.3组合机床适用的零件工艺范围和加工精度要求1

1.4组合机床的经济分析和发展趋势2

2组合机床的总体方案设计3

2.1加工工艺方案的拟定3

2.1.1工艺方案拟定的原则3

2.1.2被加工零件的特点分析3

2.2零件加工工艺的确定3

3绘制三图一卡5

3.1加工工序图5

3.2加工示意图5

3.2.1刀具的选择5

3.2.2导向套的选择6

3.2.3确定导向套距离端面的距离6

3.2.4计算切削力、切削扭矩及切削功率6

3.2.5确定工作行程长度7

3.3机床联系尺寸图7

3.3.1动力箱、电动机、动力滑台及与其所配套的附件选择8

3.3.2组合机床的其他尺寸的确定8

3.3.3组合机床的联系尺寸简图9

3.4生产率计算卡9

3.4.1理想生产率Q10

3.4.2实际生产率10

3.4.3机床负荷率10

3.4.4生产率计算卡的绘制11

4主轴箱的设计12

4.1主轴箱的简单介绍12

4.2主轴箱的原始依据图的设计12

4.3主轴、齿轮及动力运算13

4.3.1主轴的型式、直径、齿轮的齿数的设计13

4.3.2主轴箱的动力计算14

4.4主轴箱的传动设计15

4.4.1拟定传动轴15

4.4.2传动零件的校核16

4.4.3主轴箱的坐标计算17

4.5传动系统的设计与计算18

4.5.1齿轮参数的计算19

4.5.2轴径尺寸的确定19

4.5.3齿轮、轴径和轴承的校核计算19

4.6绘制右主轴箱的总装配图和零件图21

4.6.1主轴箱的总装配图的设计21

4.6.2主轴箱的零件图设计21

5结论23

参考文献24

致谢25

声明26

附录27