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1、INTRODUCTIONCHAPTER 1The mechanical precision&Lab is an important fundamentalcourse to the students majored in mechanical,automotive andaeronautical engineering.A clear definition of mechanical precision is essential in themechanical drawings,it is very important for student to learnhow to design an
2、d use it.IntroductionIn order to meet the needs of bilingualeducation for Chinese students,thiscourse is taught in English.More over,this course can also beused for the engineering education offoreign students studying in china.Purpose of the CourseTheoretical Part Experimental PartThe course is com
3、posed of two partitions:Theoretical part andExperimental part.ScheduleChapter123456IntroductionDimensional toleranceGeometrical toleranceMethods of inspectionTolerance principleSurface roughness12345ExperimentContentMeasurement of dimensionMeasurement of straightnessMeasurement of flatnessMeasuremen
4、t of circularityMeasurement of roughnessContentInterchangeability is very important in mass manufacturing,because it can greatly increase efficiency and reduce costs.Car assembly line1.1 InterchangeabilityInterchangeability is the ability to select components forassembly at random and fit them toget
5、her within propertolerances.InterchangeabilityFor producerFor userMass manufacturing,assembly line,cost down.Saving the time of design,manufacture and parts replacement.Specialization in production.Expanding the selection range of industry productions price and performance.Saving the time and cost f
6、or repairs.Easy to assemble new devices.Merit of InterchangeabilityBoth producer and user can benefit from interchangeability.Interchangeability is possible only when certain standard arestrictly followed.InterchangeabilityInterchangeability is crucial to the Modern Production.1.2 StandardizationTec
7、hnical standard is an established norm or requirementabout technical systems.International standards are with code ISO.Chinese standards are with code GB.American standards are with code ASME.Japanese standards are with code JIS.Germany standards are with code DIN.Main Standards in the WorldNotice:t
8、his GPS is not the abbreviation ofGlobal Positioning System.ISO standards on geometrical interchangeability are included in GPS(Geometrical Production Specification)standard.ISO StandardsAlthough many countries have their own standards,it can be said that the underlying concepts of these standards a
9、re almost the same since they are all written in reference to ISO standard.ISO 286Tolerances,Deviations and FitsISO 1101Tolerance of Form,Orientation,Location and Run-outISO 4287Surface texture:Profile methodRelated GPS StandardsIn this course,the following fundamental GPS standards are introduced.Measurementtechnologyprovidestechnicalsupportforinterchangeability.Measurement TechnologyThemeasurementtechnologyhereismainlygeometricmeasurement.In this course,the fundamentals of measurement technologyare also introduced.
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