《尺寸公差与表面粗糙度电子教案.ppt》由会员分享，可在线阅读，更多相关《尺寸公差与表面粗糙度电子教案.ppt（10页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、尺寸公差与表面粗糙度New expressionslDimensional toleranceslSurface roughnesslProduction costlEconomic manufacturinglProducibility standpointlShaft bearinglBearing surfacelSurface finish尺寸公差表面粗糙度生产成本经济生产可生产的观点轴承承压面，支撑面表面加工/抛光Sentence-analysis:l1.Because of the highly competitive nature of most manufacturing bu
2、siness,the question of finding ways to reduce cost is ever present.l由于大多数制造业高度竞争的天性，找到降低成本的方法是永恒的问题。Sentence-analysis:l2.Designing for function,interchangeability,quality,and economy requires a careful study of tolerances,surface finishes,processes,materials and equipment.l功能、互换性、质量和经济性的设计都要求对公差、表面光
3、洁度、工艺、材料和装备进行仔细研究。Sentence-analysis:l3.Tolerances on finish and dimensions play an important role in the final achievement or absence of practical production design.l光洁度和尺寸公差在最终效果（成品）或者没有实际加工的设计中起重要作用。Sentence-analysis:l4.Details of all parts should be surveyed carefully to assure not only inexpensi
4、ve processing but also rapid,easy assembly and maintenance.It must be remembered that each production method has a well-established level of precision which can be maintained in continuous production without exceeding normal basic cost.l所有零件的细节都应该被仔细调查以确保工艺不仅简单快捷、容易安装，而且维修方便。这就必须记住每个加工方法都有一个已建立的适当的精
5、度等级以维持连续加工而不超出正常的基本成本。Sentence-analysis:l5.Without needing to know how to operate a particular machine to attain the desired degree of surface roughness,there are certain aspects of all machining methods which should be understood by the design engineer.l设计工程师无需知道怎样操作具体的机器来获得期望的表面粗糙度，但是应该理解每一种机械加工方法
6、的诸多特定方面。Sentence-analysis:lKnowledge of such facts as degree of all roughness obtained by any operation,and the economics of attaining a smoother surface with each operation,will aid the design engineer in deciding just which surface roughness to specify.l每种操作所能获得的表面粗糙度及其成本等方面的知识有助于设计工程师确定所需的表面粗糙度。Thoughtsl1.What is the secret in the film?l2.Do you agree with the secret?Why?(no less than 80 words)此课件下载可自行编辑修改，仅供参考！此课件下载可自行编辑修改，仅供参考！感谢您的支持，我们努力做得更好！谢谢感谢您的支持，我们努力做得更好！谢谢