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L485柴油机箱体加工工艺的公理化设计【18张CAD图纸+毕业论文】【答辩通过】

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L485柴油机箱体加工工艺的公理化设计【全套CAD图纸+毕业论文】【答辩通过】.rar

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关键词：: l485 柴油机箱体加工工艺公理化设计全套 cad 图纸毕业论文答辩通过

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内容摘要1

关键词1

Abstract1

Key words1

1.绪论2

1.1“之”字映射求解方法2

1.2柴油机箱体加工专用装备公理化设计思想3

1.3柴油机箱体加工内容及结构4

2.柴油机箱体加工专用装备的功能结构求解技术4

2.1柴油机箱体加工专用装备的功能结构求解模型4

2.2柴油机箱体加工专用装备的功能结构关系模型5

3.柴油机零件工艺分析6

3.1 概述6

3.2 工艺特点6

3.3 平面的加工7

3.4 孔的加工方案7

4.工艺规程的设计7

4.1确定毛坯的制造形式7

4.2基面的选择7

5.箱体公理化设计和工艺计算8

5.1 拟定加工路线8

5.2 确定公理化要求并计算切削用量9

6.总结与展望44

参考文献45

致谢46

内容摘要:柴油机箱体是汽车五大部件之一，其生产效率和加工质量直接关系到汽车的生产效率和性能。因此，在汽车行业中，如何提高发动机箱体生产效率和加工质量是一项重要的研究课题。采取公理化设计对提高箱体质量和效率有重要意义。公理化设计理论是在独立公理和信息公理为理论基础上建立的设计理论体系，采用“之”字映射方法，耦合问题分析方法以及信息含量计算方法进行分析。它能使设计者在工作中做出正确的决定，提高工作效率，增强产品在市场的竞争力。在此基础上，针对柴油机箱体的特点，加工内容的尺寸和精度要求，将公理化设计的基本理论应用到柴油机箱体加工工艺的设计中，建立工艺设计的公理化设计模型，并进行“之”字形映射求解，得到工艺设计的公理化设计结果，在此基础上，再进行工艺详细计算。正确拟定箱体的加工工艺路线，确定切削用量及时间，保证了孔的位置精度，同时提高了生产效率，降低了工人的劳动强度。

关键词：发动机箱体公理化设计独立公理 “之”字形映射工艺

Abstract: The car engine is one of five parts, the production efficiency and machining quality directly related to the car production efficiency and performance. Therefore, in the car industry, how to improve the efficiency of the production and processing engine quality is an important research subject. Take axiomatic design to improve the quality and efficiency to have the important meaning. Axiomatic design theory is in independent justice and information theory of justice for established on the basis of the theory of the design of the system, the "of" word mapping method, coupling problem analysis method and calculation method of the information content analysis. It can make the designers in the work to make the right decisions, improve work efficiency, and enhance the competition ability of the product in the market. On this basis, according to the characteristics of the diesel engine, the size of the content of the processing and the demand of precision, axiomatic design will the basic theory of the application to the diesel engine manufacturing technique of design, build process design axiomatic design model, and "the" glyph mapping solution, get process design axiomatic design results, based on this, and then to process detailed calculation. The processing technology of the correct route worked, sure cutting value and time, to ensure the accuracy of the hole position, and at the same time, improve the production efficiency and reduce the labor intensity of the workers.

Key words: the engine axiomatic design independent justice "of the" glyph mapping process

1.绪论

随着科学技术的快速发展，技术创新也应用到实践操作中，改变着人们的生产生活方式。公理化设计是美国麻省理工学院等人在对设计理论经过系统的研究基础上提出来的，是以科学设计理论为指导的一种设计方法，侧重于改进产品的设计过程，从用户领域入手，通过“之” 字映射，对功能结构进行分层求解。其优点在于总体总体设计和流程分解的系统性，具有比较完整的设计方案评价机制。公理化设计的目标是建立一个科学基础，为设计师提供一个基于逻辑和理性思维过程及工具的理论基础来改进设计。本次设计内容介绍了公理化相关设计理论，结合柴油机箱体加工设备中存在的问题，分析了公理化在柴油机箱体设计中开发中存在的优势。

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内容简介：: 英语论文NUMERICAL CONTROL TECHNOLOGY APPLYCATIONSMost automobile dngines are internal combustion, reciprocating 4-stroke gasoline engines, but other types have been used, including the diesel, the rotary ( Wankel ), the 2-srtoke, and stratified charge.Reciprocating means up and down or banck and forth, It is the up and down action of a piston in the cylinder blick, or engine block. The blick is an iron or aluminum casting that contains engine cylinders and passges called water jackets for coolant circulation. The top of the block is covered with the cylinder head. Which forms the combustion chanber. The bottom of the block is covered with an oil pan or oil sump.Power is produced by the linear motion of a piston in a cylinder. However, this linear motion must be changed into rotary motion to turn the wheels of cars of trucks. The piston is attached to the top of a connecting rod by a pin, called a piston pin or wrist pin. The bottom of the connecting rod is attached to the crankshaft. The connecting rod transmits the up-and-down motion of the piston to the crankshaft, which changes it into rotary motion.The connecting rod is mounted on the crankshaft with large beaings called rod bearings. Similar bearings, called main bearings, are used to mount the crankshaft in the block. Shown in Fig. 1-1The diameter of the cylinder is called the engine bore. Displacement and compression ratio are two frequently used engine specifications. Displacement indicates engine size, and compression ratio compares the total cylinder volume to compression chamber volume. The term stroke is used to describe the movement of the iston within the cylinder, as well as the distance of piston travel. Depending on the type of engine the operating cycle may require either two or four strokes to complete. The 4-stroke engine is also called Otto cycle engine, in honor of the German engineer, Dr. Nikolaus Otto, who first applied the principle in 1876. In the 4-stroke engine, four strokes of the piston in the cylinder are required to complete one full operating cycle. Each stroke is named after the action it performs intake, compression, power, and exhaust in that order, shown in Fig1-2.1、Intake stroke As the piston moves down, the vaporized mixture of fuel and air enters the cylinder through open intake valve. To obtain the maximum filling of the cylinder the intake valve opens about 10before t.b.c., giving 20overlap. The inlet valve remains open until some 50after b.d.c. to take advantage of incoming mixture.2、Compression stroke The piston turns up, the intake valve closes, the mixture is compressed within the combustion chamber, while the pressure rise to about 1Mpa, depending on various factors including the compression ratio, throttle opening and engine speed. Near the top of the stroke the mixture is ignited by a spark which bridges the gap of the spark plug. 3、Power stroke The expanding gases of combustion produces a rise in pressure of the gas to some 3.5Mpa, and the piston is forced down in the cylinder. The exhaust valve opens near the bottom of the stroke.4、Exhust stroke The piston moves back up with the exhaust valve open some 50before b.d.d., allowing the pressure within the cylinder to fall and to reduce backpressure on the piston during the exhaust stroke, and the burned gases are pushed out to prepare for the next intake stroke.The intake valve usually opens just before the exhaust stroke.This 4-stroke cycle is continuously repeared in every as long as the engineremains running.A 2-stroke engine also goes through four actions to complete one operating cycle.However, the intake and the compression actions are combined in one seroke, and the power and exhaust actions are combined in the other stroke. The term2-stroke cycle or 2-stroke is preferred to the term 2-cycle, which is really not accurate.In automobile engines, all pistons are attached to a single crankshaft. The more cylinders an engine has, the more power strokes produced for cach revolution. This means that an 8-cylinder engine runs more smoothly bdcause the power atrokes are closer together in time and in degrees of engine rotation.The cylinders of multi-cylinder automotive engines arranged in one of three ways.1、Inline engines use a single block of cylinder.Most 4-cylinder and any 6-cylinder engines are of this design. The cylinders do not have to be vertical. They can be inclined either side.2、V-type engines use two equal bands of cylinders, usually inclined 60degrees or 90degrees from the cach other. Most V-type engines have 6 or 8 cylinders, although V-4 and V-12 engines have been built.3、Horizontally opposed or pancake engines have two equal banks of cylinders 180degreeas apart. These space saving engine designs are often air-cooled, and are found in the Chevrolet Carvair, Porsches, Subaru, and Volkswagens. Scubas design is liquid cooled.Late-model Volkswagen vans use a liquid-cooled version of the air cooled VWhorizontally opposed engine.译文大多数汽车的发动机是内燃机，往复四冲程汽油机，但是也有使用其它类型的发动机，包括柴油机，转子发动机，二冲程发动机和分程燃烧发动机。往复的意思就是上下运动或前后运动，在往复发动机中，气缸中活塞的上下运动产生发动机的动力，这种类型几乎所有的发动机都是依赖气缸体即发动机缸体，缸体是铸铁或铸铝制的，它包括发动机气缸和冷却液循环用的水套。缸体的顶部是气缸盖，它组成了燃烧室，缸体底部是油底壳。气缸内活塞的直线运动产生动力，然而，必须将直线运动转化成旋转运动，使汽车车轮转动，活塞销将活塞连接在连杆顶部，连杆底部与曲轴连接，使汽车车轮转动，活塞销将活塞连杆顶部，连杆底剖与曲轴连接，连杆将活塞的往复运动传递给曲轴，曲轴将其转化为旋转运动，连杆是用连杆曲轴安装在曲轴上的，用类似的轴承即主轴承将曲轴固定在缸体内。气缸的直径称为发动机的内径，排量和压缩比是两个常用的发动机参数，排量是指发动机的大小，压缩比是气缸总容积与燃烧室压缩容积之比。术语: 冲程是用来说明活塞在气缸内的运动，也就是活塞行程的距离根据发动机类型的需要二冲程或四冲程来完成一个工作循环四冲程发动机也叫做奥托发动机，为了纪念德国工程师奥托，他是在1876年第一个应用该原理的，在四冲程发动机中，要求气缸活塞四冲程来完成一个完整的工作循环，每个冲程根据其行为命名分别为: 进气冲程，压缩冲程，作功冲程和排气冲程。1、进气冲程当活塞下移时，雾化后的可燃混合气通过打开的进气门进入气缸，为了达到最大的进气量，进气门在活塞到达上止点前10打开，使进、排气门有20打开重叠角，进气门一直打开到活塞到达下止点充分进入混合气之后50左右。2、压缩冲程活塞开始向上移动时，进气门关闭，混合气在燃烧室中压缩，根据不同因素包括压缩比，

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