本科毕业论文范文 摘 要 本论文介绍了一种小型开式压力机的设计方案及其工作原理。冲压加工是现代机械制造业中先进高效的加工方法之一,它是利用安装在压力机上的模具,在常温(或加热)条件下对板料施加压力使其变形和分离,从而获得一定形状,尺寸零件的加工方法。冲压成形是一种金属塑性加工方法,因冲压件具有重量轻、厚度薄、刚性好和质量稳定的特点,所以冲压设备被广泛使用.其机构上主要是先将电动机的动力经传动系统传递到曲柄滑块机构,由曲柄带动滑块的直线往复运动。将上模板固定在滑块上,下模固定在工作台上,压力机上模随着滑块的上下移动而上下移动,以此对下模进行冲压加工。 关键词:压力机;曲柄滑块;传动系统 Abstract This paper presents a small open-press design and its working principles. Stamping is a modern processing machinery in the manufacturing sector advanced and efficient method of processing, which is installed in the press on the use of the mold, at room temperature (or heating) under the conditions of the sheet to put pressure on the deformation and separation, to obtain a certain shape, Size parts of the processing methods. Stamping is a metal processing methods, for stamping parts of light weight, thickness of thin, rigid good quality and the characteristics of stability, stamping equipment was widely used. Their bodies on the main impetus is the first motor drive system delivered to crank Slider, the crank will be rotating into the linear reciprocating slider. On the template will be fixed in the slider, under the fixed-table Dianban, the press will be placed on the material under-pressure, the pressure processing. Key words:punch;crank slider; Transmission System
本科毕业论文范文 摘 要 汽车是由许多种零部件组成的复杂的机电一体化产品.对于产品开发所需的许多技术资料,目前尚不能通过理论计算而只能通过试验获得,因此有人说“汽车是试验出来的”。 在汽车的各类总成中,驱动桥是汽车传动系中一个重要总成。车辆传动系统的可靠性是车辆保证动力性和行驶性以及燃油经济性的关键部分,而车辆传动装置中最为重要、工作条件最为恶劣的部分就是驱动桥,而且国家家行业标准规定:新设计或有重大改进的驱动桥定型生产,或进行产品质量考核时,应对驱动桥进行试验。因此,对驱动桥进行试验是汽车驱动桥台架试验方法(QC/T533—1999)规定的驱动桥型式试验必需进行的一项试验项目。 关键词:驱动桥 试验台 Abstract Car is a complex Machinery product which is composed of many kinds of components. Many of the technical information for product development can not be calculated but can only get through the test currently. So some people say that the car is made by test. Drive axle is an important automobile transmission parts in the car. The stable of vehicle drive system is a key part which is to ensure the car’s fuel economy and dynamic. Drive axle that works in a bad environment is the most important part in the vehicle transmission. According to the industry's standard of state, when there is a significant improvement、new design or Product's quality assessment in the drive axle, drive axle must to be tested. Therefore, it is necessary to test drive axle. Keywords:Drive axle; Test 目录 摘 要i Abstractii 第一章 绪论1 1.1 研究目的和动机1 1.2 研究背景1 1.3 设计思路3 第二章 试验台的结构设计4 2.1试验台结构及组成4 2.2试验台的原理框图5 第三章 机械结构强度校核6 3.1 结构6 3.2 计算6 3.2.1 横梁的剪力和弯矩6 3.2.2 横梁截面选择8 3.2.3 横梁的材料选择及强度校核10 3.2.4 重量估算13 3.2.5 联接13 第四章 关键元器件介绍18 4.1 电液伺服阀18 4.2 压力传感器18 4.2.1 压力传感器的类型19 4.4 伺服作动器19 4.4.1 伺服作动器原理19 4.4.2 伺服作动器应用领域20 第五章 总结21 参考文献22 致谢23
本科毕业论文范文 摘 要 目前汽车被用为做野外住宿用的工具的需求性愈来愈高,而汽车使用人为求车内活动的隐密空间,会在车内的各玻璃窗上加装汽车窗帘,用以将车外对车内的视线作一隔离,使在车内可做睡眠或更换衣物等动作。而要使汽车窗帘的开、合动作达到方便操作,要以电动式窗帘最为符合汽车使用人的需求。 本论文介绍了拉丝张臂式汽车自动窗帘的传动设计情况。首先叙述了选题的背景和选题的意义,作为增加行车舒适度及安全性的一个汽车内饰装备,电动窗帘因其灵活的可操控性,在中高档轿车中得到越来越多的运用。介绍了目前国内常见的电动窗帘类型以及在国内的发展前景和市场。本文着重介绍了张臂式自动窗帘的传动设计过程,作了整体装配图以及部分零件图,并对必要的结构处理做了计算,详细说明了该电动窗帘的使用过程。由于采用简单使用的滑轮、拉锁及常规形态的转臂,使得其易于制造,成本低。最后做了论文总结。 关键词:张臂式 自动窗帘 传动设计 Abstract At present the automobile is used to do tool's demanding which the open country lodging uses to be getting higher and higher, but the automobilism artificial asks the occult space which in the vehicle moves, will install the automobile window blind on vehicle's various glass windows, with by will make the vehicle outside to vehicle's line of sight an isolation, will cause clothing movements and so on makes the sleep in Che Neike or replaces. But must make the automobile window blind to open, to gather the movement to achieve the convenience operation, must most meet the automobile commuter's demand by the electromotive type window blind. The present paper briefed the wiredrawing cantilever type automobile automatic window blind's transmission design situation. First narrated the selected topic background and the selected topic significance, the achievement increases the driving comfort level and in a secure automobile plays the part of the equipment, the electrically operated window blind because of its nimble may manoeuvring, obtains more and more utilization in the upscale passenger vehicle. Introduced the present domestic common electrically operated window blind type as well as in the domestic prospects for development and the market. This article introduced emphatically the cantilever type automatic window blind's transmission design process, has made the overall assembly drawing as well as the partial detail drawings, and has made the computation to essential structure processing, explained this electrically operated window blind's use process in detail. Because uses the simple use the pulley, the zip fastener and the conventional shape tumbler, causes it easy to make, the cost is low. Finally has made the paper summary. Keywords: Cantilever type automatic window blind transmission design 目 录 中文摘要i 英文摘要.ii 目录iii 第一章 绪论.1 1.1 研究的任务与目的1 1.2 研究内容概述1 1.3 研究方法与技术路线1 1.4 目前存在的问题2 第二章 选题的背景及意义.3 2.1 防暴太阳膜的介绍3 2.2 防暴膜与电动窗帘的区别 4 2.3 电动窗帘项目介绍..5 2.3.1 电动窗帘的功能..6 2.3.2 电动窗帘的发现与现状..7 2.3.3 汽车电动窗帘技术的介绍..9 第三章 传动方案的设计16 3.1 整体方案的设计.....16 3.2 传动设计思路.16 3.2.1 驱动机构设计.16 3.2.2 导轨、滑块和拉索的设计.17 3.2.3 传动方案思路.17 3.2.4 传动装置.19 3.2.5 控制电路图的设计.19 第四章 设计参数选择..21 4.1 减速器的选择21 4.1.1 蜗杆传动设计.21 4.1.2 蜗轮轴的设计计算24 4.2 电机的选择25 第五章 总结28 参考文献.28 致谢.30
本科毕业论文范文 摘要 在当今轿车市场日益竞争激烈,国际市场已趋于饱和,而国内市场正在蓬勃发展的同时,又是各主要厂家占领市场的良好机会。那么凭什么来吸引大量客户呢?只有良好的性能价格比,尽量在降低成本的基础上提高性能,才是所有产品打开市场的根本所在。变速箱座采用的是铁制包裹,螺旋伞齿轮本身是由硬化的合金钢制成,具有低噪音和高效运动控制的特点。 关键词:传动效率 接触疲劳强度 弯曲强度 耐磨性 Abstract In today's increasingly competitive car market, The international market has become saturated. The domestic market is booming at the same time, all the major manufacturers is a good opportunity to capture the market. So what is to attract a large number of customers? Only good cost performance, as far as possible to reduce costs on the basis of performance, all of products of the fundamental open market. Block gearbox is used in steel parcels, spiral bevel gear is made by the hardening of steel, with low noise and efficient motion control features. Keywords: Transmission efficiency; Contact fatigue strength; Bending strength; Wearability 目 录 摘 要1 Abstract2 第一章 汽车变速器的作用3 1.1在较大范围内改变汽车行驶速度的大小3 1.2实现倒车行驶3 1.3实现空档3 第二章 汽车变速箱参数的初步计算4 2.1 草拟变速度器的传动方案4 2.2 变速器的主要参数的选择4 2.2.1传动比4 2.2.2汽油机的主要参数4 2.2.3选择中心距A5 第三章 齿轮的初步设计6 3.1 齿轮模数6 3.2 压力角ɑ6 3.3 齿宽b6 3.4 斜齿轮螺旋角β6 第四章 各挡齿轮齿数的分配7 4.1 齿轮注意事项7 4.2 重修中心距7 4.3 各档齿轮齿数7 4.4计算齿轮的各项参数8 4.4.1齿轮1基本参数8 4.4.2齿轮2基本参数9 4.4.3齿轮3基本参数9 4.4.4齿轮4基本参数10 4.4.5齿轮5基本参数10 4.4.6齿轮6基本参数10 4.4.7齿轮7基本参数11 4.4.8齿轮8基本参数11 4.4.9齿轮9基本参数11 4.4.10齿轮10基本参数12 第五章 齿轮的强度校核13 5.1 计算斜齿轮重和度14 5.2齿面弯曲强度计算14 5.3齿面接触强度设计15 5.4计算大、小齿轮的YFa×Ysa/[δ]F15 第六章 轴的设计计算17 6.1 轴材料选择17 6.2轴的设计17 6.3轴的强度计算18 6.3.1作用在第一档齿轮轴处的强度校核18 6.3.1作用在第二档齿轮轴处的强度校核19 6.3.1作用在第三档齿轮轴处的强度校核21 6.3.1作用在第四档齿轮轴处的强度校核21 第七章 轴承和键的选择及计算23 7.1变速器的轴承的选择23 7.2轴承使用寿命的计算23 7.3键的设计计算24 第八章 总结25 参考文献26 致 谢27
本科毕业论文范文 摘 要 在汽车保有量的增加,世界汽车工业不断发展和壮大的今天,高速、安全、环保、舒适是现代汽车发展的方向;艳阳高照的日子里,遮阳设备这类汽车用品是众多车主必不可少的标准配置。作为汽车用品的一种,遮阳设备由于其自身的优点成为了车主的首选之一,将有着广阔的市场,甚至有人在汽车前窗也加装了电动窗帘配以贴膜双重降温。国内的主要电动窗帘生产厂商主要以广东的居多像创明,飞佛,凯俊,智成等以及上海的名扬北京的金艺百容等也都是国内一批大型的电动窗帘生产厂商,但是目前我国在遮阳设备的生产方面刚刚起步,其质量与国外相比还有较大的差距,需要不断的改进与提高。这也使得我们对汽车电动窗帘的探索研发具有了意义。 电动窗帘从形式上可分为:电动开合帘、电动卷帘、电动百叶帘、户外遮阳蓬、户外百叶帘、户外遮阳板、中空百叶帘、全或半遮光引导轨卷帘。应用在汽车上,它除了能保护乘客隐私,还能阻挡紫外线,隔热因而节省夏季空调用电量等功能。 本设计所介绍的摇臂式汽车电动窗帘是属于电动窗帘的一种。其中包括电机驱动机构、上下两根横梁导轨,两根位于横梁间的叉杆、卷绕在卷筒底座里的窗帘面料以及半圆齿盘、卷弹簧、底板支架、销钉、滑轮等零部件。此设计将采用简单的半齿摇臂和交叉升降拉杆,使其结构简单,易于制造、安装,成本低,且能灵活地滑动升降。 本论文通过对国内外现状的分析、同类别产品对照,方案设计、工作装置的结构设计以及驱动变速机构的设计与计算等多方面阐述了该新型工作装置的原理和特点。 关键词:汽车用品 电动窗帘 窗帘设计 Abstract In the increase of cars in the world automobile industry continued to develop and grow today's high-speed, security, environmental protection, comfort is the direction of the development of Hyundai Motor; day sun, the sun-shading devices such motor vehicle is one of the many owners of essential supplies standard configuration. As a motor vehicle supplies, shading equipment as a result of the advantages of its own to become one of the owners preferred to have a broad market, even in the car before it was also the installation of the electric window curtains. The major domestic manufacturers of electric curtains mainly in Guangdong, as a majority of the states that fly the Buddha, Kai-Jun, Moses, etc., as well as Beijing, Shanghai's famous 100 art Yung Kim are also a number of large domestic manufacturers of electric curtains, but Currently, China's equipment in the sun has just started production, the quality and abroad there is a larger gap compared to the need for continuous improvement and enhancement. Electric curtains from the form can be divided into: opening and closing electric blinds, electric shutter, electric venetian blinds, outdoor sunroofs, outdoor venetian blinds, outdoor sun visor, blind hollow, full or semi-shade roller guide tracks. Applications in the car, it can protect passengers in addition to privacy, but also block ultraviolet rays, thermal insulation resulting in a saving of electricity consumption in summer air-conditioning and other functions.Described in this article automatically rocker car electric curtain is a curtain. Including the motor drive of its agencies, in the spring winding axis of the curtain fabric and curtain material fixed with a drop can be stretched up and down the rail beams, two beams located between the curtain and the roll bar and two cross half-tooth plate, spring roll, spare parts, such as bottom bracket. This design will use a simple semi-tooth arm movements and cross-bar to make it simple and easy to manufacture, installation, low cost, flexible and can slide off and landing.In this paper, the status quo at home and abroad through the analysis, program design, the work of the structural design of devices and components, etc. The design and calculation of the work of the new device innovation. Keywords: Automotive supplies Electric curtain curtain design 目 录 中文摘要 ..Ⅰ 英文摘要 . Ⅱ 第一章 绪论 . 1 1.1 研究的任务与目标. 1 1.2 研究的方法与技术路线 1 1.3 研究内容概述.. 2 1.4 目前存在的问题. 2 第二章 汽车窗帘的基本介绍 3 2.1 汽车窗帘的发展 3 2.2 国内外汽车电动窗帘的市场现状对比..6 2.3 国内现有电动窗帘及其周边产品配套 .6 第三章 汽车贴膜与电动窗帘的对比介绍12 3.1 防爆太阳膜..12 3.2 电动窗帘 12 3.3 两者的对比.13 第四章 原理方案构思和拟定 .14 4.1 整体方案 . 14 4.1.1初定方案..14 4.1.2 整体设计思路 16 4.2 摇臂式电动窗帘的结构设计 17 4.2.1 驱动机构的设计 .17 4.2.2 导轨和叉杆的设计.18 4.2.3 底座卷筒的设计..19 4.2.4 窗帘面料的选择..20 第五章 结构设计参数选择 ..21 5.1 运动轨迹的模拟及受力分析.21 5.2 整体结构分析.22 5.2.1 整体结构的不平衡力..22 5.2 .2 各零部件间的配合连接23 5.3 电机的选择24 第六章 总结 26 参考文献 27 致谢 .28
本科毕业论文范文 机油泵的作用是把机油送到发动机各摩擦部位,使机油在润滑路中循环,以保证发动机得到良好的润滑。所以它在润滑系统中,是一个可迫使机油泵油底壳送到引擎运动件的装置。 内燃机广泛采用齿轮式和转子式机油泵。齿轮式油泵结构简单,加工方便,工作可靠,使用寿命长,泵油压力高。由于目前我国还是大量采用齿轮式机油泵,所以此次毕业设计不但将通过对齿轮式机油泵设计来加深对机械零部件设计软件的运用,扩展自己对实际生产研究的问题认识和分析解决,提高对问题的独立思考性和巩固在课堂上所学的理论知识,增强自己理论联系实际和举一反三的综合素质,而且将更加熟悉如何对齿轮式机油泵的结构进行深层次的改进研究和开发。 本次设计着重分析了机油泵的结构特征,工作原理以及研究方法,重点讨论了机油泵在生产和实际使用中将会要遇到的问题,比如:噪声,困油,漏油等实际问题。 关键词:齿轮 机油泵 困油 噪声 漏油 Abstract Oil pump's function is delivers the machine oil the engine each friction spot, so that oil in the lubrication of road in the cycle in order to ensure that the engine be well lubricated. In the lubrication system so it is a force sent to the engine oil pump oil pan parts of device movement. The internal combustion engine widely uses the gear type and the rotor type oil pump. Gear-type oil pump has simple structure, easy to process, reliable, long life, high pressure oil pump. Because China is still a large number of used gear oil pump, so the graduation project will not only gear type oil pump designed to deepen the use of mechanical parts design software, to expand their research on the actual production of knowledge and analysis to solve problems, improve independent thinking on the issue and learned in the classroom to consolidate the theoretical knowledge and theory with practice and enhance their overall quality of replication, and will be more familiar with the gear-type oil pump structure of the improvement in depth research and development. This design analyzes the structure of oil pump, operating principles and research methods, focusing on the oil pump in the production and actual use will be problems, such as: noise, trapped oil, oil spills and other practical problems. . Keywords:Gear Oil Pump Trapping oil noise oil spills 目 录 中文摘要I 英文摘要II 目录III 第一章 绪论1 1.1 选题的背景与意义1 1.2 机油泵的结构特征1 1.3 机油泵的工作原理2 1.4 研究方法与系统描述3 第二章 齿轮式机油泵设计计算说明4 2.1 结构参数的确定4 2.2 主动齿轮的验算校核13 第三章 机油泵的结构特点及使用中的故障解决19 3.1 机油泵的泄露及解决方法19 3.2 齿轮的噪声问题及解决方法21 3.3 机油泵中的困油现象及解决方法25 第四章 总结28 参考文献29 致谢30
本科毕业论文范文 摘 要 本论文首先提出汽车离合器的工作原理和一些简单的使用技巧以及目前离合器的生产状况和未来的发展趋势。然后对离合器的生产工艺进行阐述:包括离合器盖总成的一些部件的冲压技术处理、从动盘总成中零件的热处理工艺以及其它一些的小的方面。并且分析离合器生产过程中不合理操作会照成的缺陷和使用过程中遇到的一些故障。对这些情况进行分析并改进。同时通过学习国外先进的技术提升国内离合器的生产水平。 关键字:离合器 生产工艺 缺陷 改进 Abstract This paper first automobile clutch and the working principle of the use of some simple techniques and the current production clutch situation and future trend of development. Then the clutch on the production process: including some clutch assembly covered parts stamping technology processing, assembly-driven heat treatment process, as well as parts of some other small areas. Analysis of the production process and in the clutch operation will be as unreasonable as the shortcomings encountered in the process and the use of some fault. Analysis of these situations and improve. At the same time, learning advanced foreign technology to upgrade the level of domestic production clutch. Keywords:Clutch Productive technology Defect Improve 目录 中文摘要1 英文摘要2 目录3 第一章 绪论4 1.1研究动机与目的4 1.2 国内离合器现状5 1.3离合器发展趋势6 第二章 离合器工作原理8 第三章 热处理工艺14 3.1从动盘热处理工艺14 3.2 膜片弹簧的热处理工艺14 3.3 渗碳工艺16 3.4 发蓝工艺17 第四章 离合器冲压工艺19 4.1 离合器盖冲压工艺19 4.3 离合器面片冲压工艺21 第五章 离合器装配效率的提高23 第六章 生产过程中不当操作引起的离合器故障及其改进方法25 6.1 生产过程中不合理操作产生的缺陷25 6.2 离合器使用过程中出现的故障25 6.3离合器故障排除方法及保养方法26 第七章 总结28 参考文献29 致谢30
本科毕业论文范文 摘 要 建造高层建筑和多层教学楼等大型设施已经是大势所趋。但由于有些大型设施并不是在交通便利的地段因此在建设过程中建筑泥浆的输送将会是最大的问题,为了解决这一决定性问题就有了本次的设计课题。本次设计的P型喷水柱塞泥(灰)浆泵就是用于火电厂等大型建筑单位的远程灰浆输送。这套设备添加了一套喷水系统,在柱塞进入密封体之前通过安装在柱塞四周的喷水环对其进行清洗,使其表面的灰料全被清洗掉,有效地防止了浆液颗粒进入柱塞和密封件间造成颗粒磨损因此大大降低了柱塞的磨损,提高了本类产品的使用寿命并节约了成本。设计过程主要是用机械设计原理设计P型泵内部零部件,合理布局并对零部件进行强度验算,用流体机械基础根据原始参数确定泵的主要参数流量和扬程,并确定泵的排口管和进口管的直径以及配套电机的类型,用机械设计原理及动力学原理,使各执行机构的动作协调,达到预期功效。 关键词:节约 柱塞泵 喷水系统 Abstract The construction of high-rise building and multi-layered classroom building, and other major facilities is the trend of the times.However facilities are not at convenient region.So in the process of building construction ,the delivery of the mud will be the biggest problem, in order to solve this decisiveness issue so have this design.The design of the P-type plunger mud water (ash) pump is used for thermal power plant and other constructions, such as the long-range mud transportation. This set of equipment add a set of sprinkler system ,before the plunger enters the sealing throngh the installation of the fountain ring around the plunger to wash the mud on the face of the plunger ,effective in preventing mud particies into the plunger and sealing.so it is greatly reducing the attrition r of plunger and improving the life of the product and saving the cost. The design process used mechanical design principles to design the parts of the P-type pump, Rational distribution and Checked the strength of the parts. According to the original parameters, used fluid mechanical basis to determine the pump’s main parameters flow and lift,determine the diameter of the influent pipe and exports pipe, and determine the type of Matching motor.Used mechanical design principles and kinetic theory to motor coordination the implementing agencies, to achieve the desired effect. Keywords: Saving; Piston Pump; Sprinkler system 目录 中文摘要……………………………………………………………………………………… i 英文摘要 ………………………………………………………………………………………ii 目录……………………………………………………………………………………………iii 第一章 绪论 ………………………………………………………………………………………6 1.1 课题的来源、背景和意义 ………………………………………………………6 1.2 国内外的研究或设计开发情况 …………………………………………………6 1.3 论文內容概述 ……………………………………………………………………8 1.3.1 泵的分类 …………………………………………………………………8 1.3.2 泵的工作原理 ……………………………………………………………8 1.3.3 泵的主要性能参数 ……………………………………………………9 1.3.4 P型喷水柱塞泵的工作原理 …………………………………………9 第二章 技术参数 ………………………………………………………………………10 2.1 主要结构设计参数 ……………………………………………………………11 2.2 计算校核过程 …………………………………………………………………11 第三章 结构设计 ………………………………………………………………………15 3.1 阀箱组合 ………………………………………………………………………15 3.2 传动总成 ………………………………………………………………………15 3.3 清洗水系统……………………………………………………………………15 3.4 柱塞组合………………………………………………………………………15 3.5 存在的工艺问题………………………………………………………………15 3.5.1 情况分析…………………………………………………………………16 3.5.2 组建QC小组 ……………………………………………………………16 3.5.3 技术分析 ………………………………………………………………16 3.5.4 方案的设定 ………………………………………………………………18 3.5.5 试验阶段 …………………………………………………………………20 3.5.6 效果评价 …………………………………………………………………20 3.6 注意事项及常见问题 …………………………………………………………20 第四章 结论 ……………………………………………………………………………24 参考书籍 ……………………………………………………………………………………26 致谢 …………………………………………………………………………………………27
本科毕业论文范文 摘 要 在汽车100多年的发展历史中,汽车车身经历的变化最多。目前世界汽车工业中研究最活跃、发展最迅速的领域之一就是汽车车身工程。车身的制造对汽车企业的整车生产能力有重要影响。汽车白车身是汽车其他零部件的载体,是以“钢结构”为主的支撑部件。就轿车车身的设计成本而言,约占整车总成本的一半。它通常由300至500个形状复杂的薄板冲压零件,在55~75个工位上大批量、快节奏的焊接而成。生产时,装夹定位点多达1700~2500个,焊点多达4000~5000个。白车身焊接质量的优劣对整车质量起着决定性作用。 如何改进白车身焊接工艺和提高质量已经成为汽车制造的一项重大课题。本文将从白车身制造过程中的焊接工艺、装配、检验、工艺优化和质量管理等方面展开论述,并结合众泰汽车焊装厂生产众泰5008车型的实际情况对工艺参数进行优化改进,并探讨引入全面质量控制(TQC)的可行性,并提出针对性的改进措施。 关键词:白车身 焊装工艺 质量控制 存在问题 改进措施 正交实验 Abstract In the more than 100 years’ development of automotive history, auto body changes most. Auto body work is one of the most active in research and rapidly developing field currently in world’s automobile industry. Auto body manufacturing has a significant impact on vehicle production capacity to enterprises. Body-in-white is the carrier of the other parts, which is parts-based support based on "steel". In terms of the design cost on the car body is accounting for about half of the total cost of vehicle. It is usually constituted by 300-500 complex shape sheet metal parts, and high-volume and fast-paced welded together in 55-75 positions. When manufacturing, clamping anchor points are up to 1700-2500, and 4000-5000 as many as solder joints. The welding quality of BIW plays a decisive role in vehicle quality. How to improve the welding technology and quality of BIW has become a major issue of automobile manufacturing. This article will start discussion from the BIW manufacturing process of welding, assembling, testing and quality management, and process index optimization in combination with the actual situation of producing Zotye 5008 in welding-installation factory, and explore the feasibility of the introduction of total quality control (TQC), and so to make targeted improvements. Keywords: Body-in-white; Welding-technology; Quality control; Existing problems; Improving measures; Orthogonal experiment 目 录 摘 要I AbstractII 目 录III 第一章 绪 论1 1.1 本文研究背景1 1.2 本文的选题依据1 1.3 研究思路与内容2 第二章 焊装工艺4 2.1 工装设备4 2.1.1 焊装夹具5 2.1.2 焊枪6 2.2 工艺参数7 2.2.1 电阻点焊工艺参数7 2.2.2 CO2气保焊主要工艺参数8 2.3 焊接质量9 2.4 问题及解决措施11 第三章 工艺流程及参数优化13 3.1 众泰汽车焊装厂情况概述13 3.2 众泰5008白车身工艺流程13 3.3 工艺参数优化17 3.3.1 正交实验法简介17 3.3.2 实验原理18 3.3.3 实验方法18 3.3.4 试验结果分析20 3.3.5 结果分析20 3.3.6 实验结果验证21 第四章 质量过程控制22 4.1 质量控制的发展22 4.2 全面质量控制与其他的比较23 4.2.1 与TPM的比较24 4.2.2 与ISO9000族质量管理的比较24 4.3 在焊装厂实施TQC的可行性分析25 4.3.1 焊装厂实施TQC的SWOT分析25 4.3.2 焊装厂实施TQC的重要性和方法27 第五章 结论29 致 谢30 参考文献31 附录A 门盖焊接总成工艺卡32 附录B 车身骨架焊接总成工艺卡36
本科毕业论文范文 摘要 为了一种新型垫片设计一副无毛刺冲孔模具,模具结构为正装模,冲孔料采用弹性装置。为了实现无毛刺,在凹模底部设置反顶机构。设计了一种新型无毛刺冲孔模具。用该模具进行板料冲孔可实现无毛刺冲裁,孔的光洁剪切带长度可达到材料厚度的80%~85%,并可显著提高孔的尺寸精度和形位精度,达到精密冲裁的加工效果。该模具易于制造,可在普通冲床上使用,适合在生产中推广应用。 关键词:模具设计 冲孔 无毛刺 abstract For a new gasket design of a burr without punching die. Die structure of the module is installed,punching expected to adopt a flexible device. To achieve a burr in die bottorn of the top institutions set up anti. A new style punch die without burrs is designd .The punching without burrs on the metal plate can be carried out by using this die , the length of bringt shearing fracture to the hole can be increased to 80%~85% of material thickness and the punched hole’s precision of size , shape and position can be improved extremely, so that the processing effect of the precise punching can be achieved with this kind of die .Because the die can be easily made and used on the ordinary punching press , so it can be widely used in the punching. Key words: diedesign punch noburr 目 录 摘要i abstractii 目 录iii 第一章 绪论1 第二章 冲裁模工艺与结构设计3 2.1 零件的工艺分析3 2.2 冲压工艺计算3 2.2.1 计算冲压力3 2.3 模具压力中心的计算4 2.4 凸凹模刃口尺寸的确定4 第三章 冲压模具主要零件的结构设计7 3.1 凸模的结构设计7 3.1.1 凸模固定板的厚度8 3.1.2 垫板8 3.2 凹模结构设计9 3.3 卸料零件的设计9 3.4 模柄的选用11 3.5 模架的选用11 3.6 压力机的选用11 3.7 凸模固定板与垫板14 3.8 定位零件的设计与标准14 第四章 无毛刺冲裁反顶机构的设计15 4.1 反顶装置的背景特点15 4.2 反顶装置的工作原理及设计15 4.3 反顶装置的液压系统17 4.4 液压动力系统的选择19 4.4.1 单泵供油液压动力系统19 4.4.2 泵——蓄能器液压动力系统19 第五章 结论21 致 谢22 参考文献23