毕业设计-发动机缸盖

毕业设计

摘要

毕业设计是对学生整个大学阶段学习内容的概括和总结，是学生对知识的掌握和提炼程度的一个检验，它是进一步提高学生进入工作岗位之前岗位能力的有效措施，学生通过毕业设计更能贴近就业后岗位的实际。

本课题是发动机缸盖机械加工过程工艺规程制定及工艺装备设计（钻床专用夹具的设计）。缸盖是发动机中比较复杂及具有代表性的零件之一，基于缸盖在发动机整体结构中重要性，缸盖的的制造过程和制造工艺显得尤为重要。

发动机关键零件的加工精度和质量直接影响发动机的性能，对发动机关键零件进行工艺规程及工艺装备设计是确保加工精度和质量的关键。缸盖的制造过程坯的制造、加工工艺过程的制定等几个过程。根据生产类型，保证加工精度，满足设计图样要求。本毕业设计应达到一定得要求和具备一定的条件：1．绘制零件图，对零件图进行分析；2. 设计毛坯图；3. 设计零件机械加工工艺规程；4. 设计钻床夹具，绘制夹具装配图。

关键字：发动机；发动机缸盖；机械加工工艺规程；专用夹具

Abstract

Designed for students graduating from the University of stages throughout the study and summarize the contents of the summary, is a student of knowledge and degree of refining a test, it is to further enhance students ability to work prior to the effective measures positions, students graduating from design through closer the actual post-employment status.

The issue is the process of engine cylinder head machining process planning technique and equipment development and design (special drilling jig design). Engine cylinder head is more complicated and one representative of the parts, based on the overall structure in the engine cylinder head in the importance of the manufacturing process of cylinder head and the manufacturing process is especially important.

Critical engine parts machining accuracy and quality of a direct impact on the performance of the engine, key parts of the engine technology and process design point of order is to ensure that the machining accuracy and quality of the key. Billet cylinder head manufacturing process of the manufacture, processing process, such as the process of formulation. According to the production of the type of processing to ensure accuracy and meet the design requirements. Should be designed to meet the graduation requirements and must have certain conditions: 1. Parts Drawing on an analysis of part drawing; 2. The design of rough map; 3. The design of parts machining process planning; 4. The design of drilling jig, fixture assembly drawing.

Key words:Engines, Engine Cylinder Head, Machining Process Planning, A dedicated fixture

目录

摘要....................................................................................................................... I ABSTRACT ....................................................................................................... II 目录.................................................................................................................... I II 第1章绪论 (1)

1.1课题研究的意义及现状 (1)

1.2论文主要研究内容 (7)

第2章发动机缸盖工艺设计 (9)

2.1发动机缸盖的分析 (9)

2.1.1发动机缸盖的功用分析 (9)

2.1.2发动机缸盖结构和功用的分析 (9)

2.1.3发动机缸盖技术分析 (10)

2.1.4发动机缸盖的材料分析 (10)

2.2发动机缸盖毛坯的设计 (14)

2.2.1计算生产纲领，确定生产类型 (14)

2.2.2确定毛坯种类及加工方法的选择 (14)

2.2.3毛坯的工艺分析及要求 (16)

2.2.4毛坯余量和公差的确定 (16)

2.3工艺路线设计 (19)

2.3.1零件图的工艺分析 (19)

2.3.2加工方法的选择 (22)

2.3.3缸盖的材料及热处理 (23)

2.3.4阶段的划分 (23)

2.3.5工序的集中与分散 (24)

2.3.6基准的选择 (24)