0168-三面翻广告牌传动系统设计【全套11张CAD图】
0168-三面翻广告牌传动系统设计【全套11张CAD图】,全套11张CAD图,三面翻,广告牌,传动系统,设计,全套,11,十一,cad
一、选题的意义户外广告是一种典型的城市广告形式,随着社会经济的发展,户外广告已不仅仅是广告业发展的一种传播媒介手段,而是现代化城市环境建设布局中的一个重要组成部分。本设计为三面翻广告牌的传动系统,三面翻广告牌是由一组并排的三棱柱组成,三棱柱可由铝型材制成,且可围绕自身中心轴转动,将三种广告画面分别设置在改组三棱柱的三个面上,从而利用三棱柱的三个侧面可形成三副画面,转动三棱柱即可变换广告画面。因此,三面翻广告牌具有同一面积可三陪表现的空间和视觉感的优点。现有三面翻广告牌通常由传动装置来实现其不断变换画面的功能,但现有的传动装置结构复杂,复杂的结构使其制造成本较高,而且使用上容易出现故障,使得三面翻广告牌的工作可靠性降低。针对上述现有技术的不足,本设计的主要目的是提供三面翻广告牌的传动装置,其结构简单、成本低且工作可靠度高。为实现上述目的,本三面翻广告牌传动装置包括一用于连接电机的第一传动轴、一用于连接广告牌的第二传动轴,连接在第一传动轴的第一传动轮及连接在第二传动轴的第二传动轮垂直设置,第一传动轮可以带动第二传动轮转动,而第二传动轮的转动带动第二传动轴及广告牌进行转动,所述述第二传动轮包括一第一齿轮于一第二齿轮,所述凸起可推动第一齿轮转动,而所述凹槽则可配合且以其侧壁带动第二齿轮转动,且在凹槽和凸起分别于第一和第二齿轮完成一次啮合后,第二传动轮绕第二传动轴转动120。 三面翻广告牌的传动装置,其中,所述第一于第二齿轮分别具有三个等角度间隔设计的齿,且第一于第二齿轮分别呈三角形状。第一与第二齿轮沿其中心线重叠设计,且六个齿为等角度间隔设计。凹槽与凸起沿第一传动轮的径向设计,凸起大致呈圆弧状,且其两端设有导引面;凹槽的相对两壁设有导引面,且大致呈八字状。 传动装置包括数个第一、第二传动轮及第二传动轴,且所述第一传动轮的凹槽与凸起排列在同一条直线上,沿广告牌中心将数个第一传动轮分成呈镜像对称设置的两部分,且每一部分的凹槽与凸起依次沿一条曲线排列设置。国内外三面翻广告的发展趋势: 日前,由国家发改委工业司牵头编制的专项研究报告国际装备三面翻业的最新发展动态与趋势出炉。该报告对20002006年美国、日本、德国、法国、意大利、韩国、巴西、印度和国九个国家的装备三面翻业总产值、增加值等数据进行了全面统计,以定量分析的方法研究了国际装备三面翻业的发展现状、动态及趋势,以及国际装备三面翻业的技术发展趋势与组织结构调整演变。该报告预测,在国内需求拉动与国际产业转移的“双重动力”带动下,我国装备三面翻业将继续保持快速稳定增长的良好势头,预计未来五年内利润增长率仍可持续在30%左右,而行业发展也将体现以下四个方面的特征:第一、产业总规模进一步扩大,基础地位不断增强。作为为国民经济发展和国防建设提供技术装备的基础性、支柱性和战略性的产业,装备三面翻业目前已成为我国规模最大的产业门类之一。据统计,2007年我国装备三面翻业总产值首次突破7万亿元,比2006年增长近32%,连续5年以超过20%的速度持续快速发展;国内规模以上装备三面翻企业实现利润3886.66亿元,同比增长47.79%。第二、研发投入进一步增加,创新能力不断提高。今后一段时期,我国增强自主创新能力、振兴装备三面翻业的一系列重大项目将继续实施,对于引导企业等社会各方面加大对装备三面翻业的研发投入,提升装备三面翻企业的创新能力,具有十分重要的意义。报告预测,未来5年内我国装备三面翻企业研发投入占销售收入的比重将由现在的1.4%左右增长到2%左右。第三、创造的自主知识产权总量进一步增大,核心竞争力不断提升。我国装备三面翻业九大重点领域(发电设备、石化设备、冶金设备、机床、仪器仪表、煤炭机械、工程机械、农业机械、环保设备)的国内单位或个人,在华申请专利数量呈现出持续增长的态势。报告预测,未来5年内装备三面翻业九大重点领域的国内单位或个人在华发明专利授权总量、发明专利申请总量和实用新型专利总量的增长率都将达到30%以上;我国装备三面翻业被授予国驰名商标的数量仍会进一步增加,年均增长率将达到30%以上。 第四、国家重大工程项目进一步实施,一大批重大技术装备不断实现自主化。报告预测,未来5年内,依托国家重大工程,在能源、材料、机械三面翻等领域,加快研制开发大容量高水头水电机组、百万千瓦压水堆核电关键设备、大型石油天然气长输管线成套装备、大型煤矿综合采掘及洗选成套装备、百万吨级大型乙烯成套设备、大型煤化工成套设备、大型宽带薄板及宽厚钢板生产关键装备、新型船舶和海洋石油工程设备等,一大批重大技术装备必将逐步实现自主化。二、研究的主要内容1.确定三面翻广告牌传动系统方案(主要是间隙传动为主,辅以其他传动方式),要求能实现多种翻动效果(也就是说能不能利用所设计结构,可以通过方便的调整,实现非单一的翻动效果);2.完成三面翻广告牌传动系统中关键零部件的结构参数设计,包括传动部件的设计(齿轮,间隙机构等),轴的设计与校核,电机的选择等3.完成三面翻广告牌结构装配图与相关零件图(A0两张)4.三面翻广告牌传动系统三维造型(选作简单控制系统)三、设计步骤、方法及措施 1设计准备阶段 2周2拟定总体方案 2周3. 绘制图纸 5 周4传动系统的设计 3周5设计说明书撰写 3周6准备答辩讲稿、进行答辩 1周四、毕业论文提纲1前言2总体方案的论证3传动方案的论证4选用电动机5机械传动装置的总体设计与计算6机械传动件的设计计算7间隙机构方案的选择8不完全齿轮效果造型9轴的设计计算10轴承的选择和润滑11轴承盖的设计计算12结论参考文献致 谢五、主要参考文献1 王旭, 王积森. 机械设计课程设计M.北京:机械工业出版社,2003.2 成大先. 机械设计手册 单行版 机械传动M.北京:化工工业出版社,2004.3 成大先. 机械设计手册 单行版 轴及其联接M.北京:化工工业出版社,2004.4 成大先. 机械设计手册 单行版 轴承M.北京:化工工业出版社,2004.5 钱志峰,刘苏.工程图学基础教程M.北京:科学出版社,2001.6 沈世德. 机械原理M.北京:机械工业出版社,2001.7 瞿燕南,机械制造技术M. 北京:机械工业出版社,2001.8 徐 灏. 机械设计手册M. 北京:机械工业出版社,1991. 9 机械工程手册,电机工程手册编辑委员会. 机械工程手册M. 北京:机械工业出版社,1995.10 徐 灏. 新编机械设计师手册M. 北京:机械工业出版社,1995. 11 胡家秀. 机械零件设计实用手册M. 北京:机械工业出版社,1999. 12 李益民. 机械制造工艺设计手册M. 北京:机械工业出版社,1995. 13 张耀宸. 机械加工工艺设计手册M. 北京:航空工业出版社,1987.14 孟宪源. 现代机构手册 M. 北京:机械工业出版社,1994.15 徐锦康. 机械设计M.北京:高等教育出版社,2004. 16 吉卫喜. 机械制造技术M. 北京:机械工业出版社,2001.摘要:户外广告是一种典型的城市广告形式,随着社会经济的发展,户外广告已不仅仅是广告业发展的一种传播媒介手段,而是现代化城市环境建设布局中的一个重要组成部分。本设计为三面翻广告牌的传动系统,三面翻广告牌是由一组并排的三棱柱组成,三棱柱可由铝型材制成,且可围绕自身中心轴转动,将三种广告画面分别设置在改组三棱柱的三个面上,从而利用三棱柱的三个侧面可形成三副画面,转动三棱柱即可变换广告画面。本文介绍了三面翻广告牌传动系统方案,能够实现多种翻动效果,实现非单一的翻动效果,并完成三面翻广告牌传动系统中关键零部件的结构参数设计,包括传动部件的设计,轴的设计与校核,电机的选择等。运用CAD软件完成了三面翻广告牌结构装配图与相关零件图,并运用Pro/e软件对三面翻广告牌传动系统进行三维造型设计。关键字:三面翻、传动系统、广告牌、设计Abstract:Outdoor advertising is a typical urban forms of advertising, with the social and economic development, outdoor advertising is not only the development of the advertising industry as a means of mass media, but the layout of modern urban environment is an important component. The design for the three billboards in the transmission system, three billboards side by side by a group composed of three prism, triangular prism can be made of aluminum, and can rotate around its central axis, the three ad screens were set up in the restructuring of The three prism surface to take advantage of the three prism can be formed three pictures side, turn the prism to change advertising display.This article describes three billboards drive solution that can achieve a variety of flip effects, to achieve non-single flip effects, and complete the three billboards drive the structural parameters in the design of key components, including the design of transmission components, the axis design and verification, motor selection. The use of CAD software to complete the structure of the three billboards assembly drawing and related parts diagram, and the use of Pro / e software, three billboards on the three-dimensional drive system design.朗读显示对应的拉丁字符的拼音Key words: Three sides、Transmission、Billboard、Design机械设计理论机械设计是一门通过设计新产品或者改进老产品来满足人类需求的应用技术科学。它涉及工程技术的各个领域,主要研究产品的尺寸、形状和详细结构的基本构思,还要研究产品在制造、销售和使用等方面的问题。进行各种机械设计工作的人员通常被称为设计人员或者机械设计工程师。机械设计是一项创造性的工作。设计工程师不仅在工作上要有创造性,还必须在机械制图、运动学、工程材料、材料力学和机械制造工艺学等方面具有深厚的基础知识。 如前所诉,机械设计的目的是生产能够满足人类需求的产品。发明、发现和科技知识本身并不一定能给人类带来好处,只有当它们被应用在产品上才能产生效益。因而,应该认识到在一个特定的产品进行设计之前,必须先确定人们是否需要这种产品。应当把机械设计看成是机械设计人员运用创造性的才能进行产品设计、系统分析和制定产品的制造工艺学的一个良机。掌握工程基础知识要比熟记一些数据和公式更为重要。仅仅使用数据和公式是不足以在一个好的设计中做出所需的全部决定的。另一方面,应该认真精确的进行所有运算。例如,即使将一个小数点的位置放错,也会使正确的设计变成错误的。一个好的设计人员应该勇于提出新的想法,而且愿意承担一定的风险,当新的方法不适用时,就使用原来的方法。因此,设计人员必须要有耐心,因为 所花费的时间和努力并不能保证带来成功。一个全新的设计,要求屏弃许多陈旧的,为人们所熟知的方法。由于许多人墨守成规,这样做并不是一件容易的事。一位机械设计师应该不断地探索改进现有的产品的方法,在此过程中应该认真选择原有的、经过验证的设计原理,将其与未经过验证的新观念结合起来。新设计本身会有许多缺陷和未能预料的问题发生,只有当这些缺陷和问题被解决之后,才能体现出新产品的优越性。因此,一个性能优越的产品诞生的同时,也伴随着较高的风险。应该强调的是,如果设计本身不要求采用全新的方法,就没有必要仅仅为了变革的目的而采用新方法。在设计的初始阶段,应该允许设计人员充分发挥创造性,不受各种约束。即使产生了许多不切实际的想法,也会在设计的早期,即绘制图纸之前被改正掉。只有这样,才不致于堵塞创新的思路。通常,要提出几套设计方案,然后加以比较。很有可能在最后选定的方案中,采用了某些未被接受的方案中的一些想法。心理学家经常谈论如何使人们适应他们所操作的机器。设计人员的基本职责是努力使机器来适应人们。这并不是一项容易的工作,因为实际上并不存在着一个对所有人来说都是最优的操作范围和操作过程。另一个重要问题,设计工程师必须能够同其他有关人员进行交流和磋商。在开始阶段,设计人员必须就初步设计同管理人员进行交流和磋商,并得到批准。这一般是通过口头讨论,草图和文字材料进行的。为了进行有效的交流 ,需要解决下列问题:(1) 所设计的这个产品是否真正为人们所需要?(2) 此产品与其他公司的现有同类产品相比有无竞争能力?(3) 生产这种产品是否经济?(4) 产品的维修是否方便?(5) 产品有无销路?是否可以盈利? 只有时间能对上述问题给出正确答案。但是, 产品的设计、制造和销售只能在对上述问题的初步肯定答案的基础上进行。设计工程师还应该通过零件图和装配图,与制造部门一起对最终设计方案进行磋商。通常 ,在制造过程中会出现某个问题。可能会要求对某个零件尺寸或公差作一些更改,使零件的生产变得容易。但是,工程上的更改必须要经过设计人员批准,以保证不会损伤产品的功能。有时,在产品的装配时或者装箱外运前的试验中才发现设计中的某种缺陷。这些事例恰好说明了设计是一个动态过程。总是存在着更好的方法来完成设计工作,设计人员应该不断努力,寻找这些更好的方法。近些年来,工程材料的选择已经显得重要。此外,选择过程应该是一个对材料的连续不断的重新评价过程。新材料不断出现,而一些原有的材料的能够获得的数量可能会减少。环境污染、材料的回收利用、工人的健康及安全等方面经常会对材料选择附加新的限制条件。为了减轻重量或者节约能源,可能会要求使用不同的材料。来自国内和国际竞争、对产品维修保养方便性要求的提高和顾客的反馈等方面的压力,都会促使人们对材料进行重新评价。由于材料选用不当造成的产品责任诉讼,已经产生了深刻的影响。此外,材料与材料加工之间的相互依赖关系已经被人们认识得更清楚。因此,为了能在合理的成本和确保质量的前提下获得满意的结果,设计工程师的制造工程师都必须认真仔细地选择、确定和使用材料。制造任何产品的第一步工作都是设计。设计通常可以分为几个明确的阶段:(a)初步设计;(b)功能设计;(c)生产设计。在初步设计阶段,设计者着重考虑产品应该具有的功能。通常要设想和考虑几个方案,然后决定这种思想是否可行;如果可行,则应该对其中一个或几个方案作进一步的改进。在此阶段,关于材料选择唯一要考虑的问题是:是否有性能符合要求的材料可供选择;如果没有的话,是否有较大的把握在成本和时间都允许的限度内研制出一种新材料。在功能设计和工程设计阶段,要做出一个切实可行的设计。在这个阶段要绘制出相当完整的图纸,选择并确定各种零件的材料。通常要制造出样机或者实物模型,并对其进行试验,评价产品的功能、可靠性、外观和维修保养性等。虽然这种试验可能会表明,在产品进入到生产阶段之前,应该更换某些材料,但是,绝对不能将这一点作为不认真选择材料的借口。应该结合产品的功能,认真仔细地考虑产品的外观、成本和可靠性。一个很有成就的公司在制造所有的样机时,所选用的材料应该和其生产中使用的材料相同,并尽可能使用同样的制造技术。这样对公司是很有好处的。功能完备的样机如果不能根据预期的销售量经济地制造出来,或者是样机与正式生产的装置在质量和可靠性方面有很大不同,则这种样机就没有多大的价值。设计工程师最好能在这一阶段完全完成材料的分析、选择和确定工作,而不是将其留到生产设计阶段去做。因为,在生产设计阶段材料的更换是由其他人进行的,这些人对产品的所有功能的了解不如设计工程师。在生产设计阶段中,与材料有关的主要问题是应该把材料完全确定下来,使它们与现有的设备相适应,能够利用现有设备经济地进行加工,而且材料的数量能够比较容易保证供应。在制造过程中,不可避免地会出现对使用中的材料做一些更改的情况。经验表明,可采用某些便宜材料作为替代品。然而,在大多数情况下,在进行生产以后改换材料要比在开始生产前改换材料所花费的代价要高。在设计阶段做好材料选择工作,可以避免多数这样的情况。在生产制造开始后出现了可供使用的新材料是更换材料的最常见的原因。当然,这些新材料可能降低成本、改进产品的性能。但是,必须对新材料进行认真的评价,以确保其所有性能都满足要求。应当记住,新材料的性能和可靠性很少像现有材料那样为人们所了解。大部分的产品失效和产品责任事故案件是由于在选用新材料作为替代材料之前,没有真正了解它们的长期使用性能而引起的。产品的责任诉讼迫使设计人员和公司在选择材料时,采用最好的程序。在材料过程中,五个最常见的问题为:(a)不了解或者不会使用关于材料应用方面的最新最好的信息资料;(b)未能预见和考虑擦黑年品可能的合理用途(如有可能,设计人员还应进一步预测和考虑由于产品使用方法不当造成的后果。在近年来的许多产品责任诉讼案件中,由于错误地使用产品而受到伤害的原告控告生产厂家,并且赢得判决);(c)所使用的材料的数据不全或是有些数据不确定,尤其是当其长期性能数据是如此的时候;(d)质量控制方法不适当和未经验证;(e)由一些完全不称职的人员选择材料。通过对上述五个问题的分析,可以得出这些问题是没有充分理由存在的结论。对这些问题的研究分析可以为避免这些问题的出现指明方向。尽管采用最好的材料选择方法也不能避免发生产品责任诉讼,设计人员和工业界按照适当的程序进行材料选择,可以大大减少诉讼的数量。从以上的讨论可以看出,选择材料的人们应该对材料的性质,特点和加工方法有一个全面而基本的了解。4Machine design theoryThe machine design is through designs the new product or improves the old product to meet the human need the application technical science. It involves the project technology each domain, mainly studies the product the size, the shape and the detailed structure basic idea, but also must study the product the personnel which in aspect the and so on manufacture, sale and use question.Carries on each kind of machine design work to be usually called designs the personnel or machine design engineer. The machine design is a creative work. Project engineer not only must have the creativity in the work, but also must in aspect and so on mechanical drawing, kinematics, engineerig material, materials mechanics and machine manufacture technology has the deep elementary knowledge. If front sues, the machine design goal is the production can meet the human need the product. The invention, the discovery and technical knowledge itself certainly not necessarily can bring the advantage to the humanity, only has when they are applied can produce on the product the benefit. Thus, should realize to carries on before the design in a specific product, must first determine whether the people do need this kind of productMust regard as the machine design is the machine design personnel carries on using creative ability the product design, the system analysis and a formulation product manufacture technology good opportunity. Grasps the project elementary knowledge to have to memorize some data and the formula is more important than. The merely service data and the formula is insufficient to the completely decision which makes in a good design needs. On the other hand, should be earnest precisely carries on all operations. For example, even if places wrong a decimal point position, also can cause the correct design to turn wrongly. A good design personnel should dare to propose the new idea, moreover is willing to undertake the certain risk, when the new method is not suitable, use original method. Therefore, designs the personnel to have to have to have the patience, because spends the time and the endeavor certainly cannot guarantee brings successfully. A brand-new design, the request screen abandons obsoletely many, knows very well the method for the people. Because many person of conservativeness, does this certainly is not an easy matter. A mechanical designer should unceasingly explore the improvement existing product the method, should earnestly choose originally, the process confirmation principle of design in this process, with has not unified it after the confirmation new idea. Newly designs itself can have the question occurrence which many flaws and has not been able to expect, only has after these flaws and the question are solved, can manifest new goods come into the market the product superiority. Therefore, a performance superior product is born at the same time, also is following a higher risk. Should emphasize, if designs itself does not request to use the brand-new method, is not unnecessary merely for the goal which transform to use the new method.In the design preliminary stage, should allow to design the personnel fully to display the creativity, not each kind of restraint. Even if has had many impractical ideas, also can in the design early time, namely in front of the plan blueprint is corrected. Only then, only then does not send to stops up the innovation the mentality. Usually, must propose several sets of design proposals, then perform the comparison. Has the possibility very much in the plan which finally designated, has used certain not in plan some ideas which accepts. How does the psychologist frequently discuss causes the machine which the people adapts them to operate. Designs personnels basic responsibility is diligently causes the machine to adapt the people. This certainly is not an easy work, because certainly does not have to all people to say in fact all is the most superior operating area and the operating process. Another important question, project engineer must be able to carry on the exchange and the consultation with other concerned personnel. In the initial stage, designs the personnel to have to carry on the exchange and the consultation on the preliminary design with the administrative personnel, and is approved. This generally is through the oral discussion, the schematic diagram and the writing material carries on. In order to carry on the effective exchange, needs to solve the following problem: (1) designs whether this product truly does need for the people? Whether there is competitive ability (2) does this product compare with other companies existing similar products? (3) produces this kind of product is whether economical? (4) product service is whether convenient? (5) product whether there is sale? Whether may gain?Only has the time to be able to produce the correct answer to above question. But, the product design, the manufacture and the sale only can in carry on to the above question preliminary affirmation answer foundation in. Project engineer also should through the detail drawing and the assembly drawing, carries on the consultation together with the branch of manufacture to the finally design proposal.Usually, can have some problem in the manufacture process. Possibly can request to some components size or the common difference makes some changes, causes the components the production to change easily. But, in the project change must have to pass through designs the personnel to authorize, guaranteed cannot damage the product the function. Sometimes, when in front of product assembly or in the packing foreign shipment experiment only then discovers in the design some kind of flaw. These instances exactly showed the design is a dynamic process. Always has a better method to complete the design work, designs the personnel to be supposed unceasingly diligently, seeks these better method. Recent year, the engineerig material choice already appeared importantly. In addition, the choice process should be to the material continuously the unceasing again appraisal process. The new material unceasingly appears, but some original materials can obtain the quantity possibly can reduce. The environmental pollution, material recycling aspect and so on use, workers health and security frequently can attach the new limiting condition to the choice of material. In order to reduce the weight or saves the energy, possibly can request the use different material. Comes from domestic and international competition, to product service maintenance convenience request enhancement and customers aspect the and so on feedback pressure, can urge the people to carry on to the material reappraises. Because the material does not select when created the product responsibility lawsuit, has already had the profound influence. In addition, the material and between the material processing interdependence is already known by the people clearly. Therefore, in order to can and guarantees the quality in the reasonable cost under the premise to obtain satisfaction the result, project engineer makes engineers all to have earnestly carefully to choose, the determination and the use material. Makes any product the first step of work all is designs. Designs usually may divide into several explicit stages: (a) preliminary design; (b) functional design; (c) production design. In the preliminary design stage, the designer emphatically considered the product should have function. Usually must conceive and consider several plans, then decided this kind of thought is whether feasible; If is feasible, then should makes the further improvement to or several plans. In this stage, the question which only must consider about the choice of material is: Whether has the performance to conform to the request material to be possible to supply the choice; If no, whether has a bigger assurance all permits in the cost and the time in the limit develops one kind of new material.In the functional design and the engineering design stage, needs to make a practical feasible design. Must draw up the quite complete blueprint in this stage, chooses and determines each kind of components the material. Usually must make the prototype or the working model, and carries on the experiment to it, the appraisal product function, the reliability, the outward appearance and the service maintenance and so on. Although this kind of experiment possibly can indicate, enters in the product to the production base in front of, should replace certain materials, but, absolutely cannot this point take not earnestly chooses the material the excuse. Should unify the product the function, earnestly carefully considers the product the outward appearance, the cost and the reliability. Has the achievement very much the company when manufacture all prototypes, selects the material should the material which uses with its production in be same, and uses the similar manufacture technology as far as possible. Like this has the advantage very much to the company. The function complete prototype if cannot act according to the anticipated sales volume economically to make, or is prototypical and the official production installment has in the quality and the reliable aspect is very greatly different, then this kind of prototype does not have the great value. Project engineer is best can completely complete the material in this stage the analysis, the choice and the determination work, but is not remains it to the production design stage does. Because, is carries on in the production design stage material replacement by other people, these people are inferior to project engineer to the product all functions understanding. In the production design stage, is should completely determine with the material related main question the material, causes them to adapt with the existing equipment, can use the existing equipment economically to carry on the processing, moreover the material quantity can quite be easy to guarantee the supply. In the manufacture process, inevitably can appear to uses the material to make some changes the situation. The experience indicated that, may use certain cheap materials to take the substitute. However, in the majority situation, in will carry on the production later to change the material to have in to start before the production to change the price which the material will spend to have to be higher than. Completes the choice of material work in the design stage, may avoid the most such situations. Started after the production manufacture to appear has been possible to supply the use the new material is replaces the material the most common reason. Certainly, these new materials possibly reduce the cost, the improvement product performance. But, must carry on the earnest appraisal to the new material, guarantees its all performance all to answer the purpose. Must remember that, the new material performance and the reliable very few pictures materials on hand such understood for the people. The majority of products expiration and the product accident caused by negligence case is because in selects the new material to take in front of substitution material, not truly understood their long-term operational performance causes. The product responsibility lawsuit forces designs the personnel and the company when the choice material, uses the best procedure. In the material process, five most common questions are: (a) did not understand or cannot use about the material application aspect most newly the best information paper; (b) has not been able to foresee and to consider the dusk year possible reasonable use (for example to have the possibility, designs the personnel also to be supposed further to forecast and the consideration because product application method not when creates consequence. In recent years many products responsibilities lawsuit case, because wrongly uses the plaintiff which the product receives the injury to accuse produces the factory, and wins the decision); (c) uses the material data not entire perhaps some data are indefinite, works as its long-term performance data is the like this time in particular; (d) the quality control method is not suitable and not after the confirmation; (e) the personnel which completely is not competent for the post by some chooses the material. Through to the above five questions analysis, may obtain these questions is does not have the sufficient reason existence the conclusion. May for avoid these questions to these questions research analyses the appearance indicating the direction. Although uses the best choice of material method not to be able to avoid having the product responsibility lawsuit, designs the personnel and the industry carries on the choice of material according to the suitable procedure, may greatly reduce the lawsuit the quantity. May see from the above discussion, the choice material people should to the material nature, the characteristic and the processing method have comprehensive and the basic understanding.6
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