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1、蒿作呸荒蜗旬软拽跽憨砂醍附录升颥涅届寨筒狎酣伯鞋偷钏蚕叻禊博痱辘蛸圊惮赝谣乔MechanicalDesignandManufacturingProcesses晷潜届酹尾踏萏畅虹缇坩楝傺蚜鹎波龌蛙旖苦抵亵攥箴Mechanicaldesignistheapplicationofscienceandtechnologytodeviseneworimprovedproductsforthepurposeofsatisfyinghumanneeds.Itisavastfieldofengineeringtechnologywhichnotonlyconcernsitselfwiththeo
2、riginalconceptionoftheproductintermsofitssize,shapeandconstructiondetails,butalsoconsidersthevariousfactorsinvolvedinthemanufacture,marketinganduseoftheproduct.凸绸堀玲续瑞顺胩吧募态媸Peoplewhoperformthevariousfunctionsofmechanicaldesignaretypicallycalleddesigners,ordesignengineers.Mechanicaldesignisbasi
3、callyacreativeactivity.However,inadditiontobeinginnovative,adesignengineermustalsohaveasolidbackgroundintheareasofmechanicaldrawing,kinematics,dynamics,materialsengineering,strengthofmaterialsandmanufacturingprocesses.孤苻诀局蛇瞄格些店螈着鳖Asstatedpreviously,thepurposeofmechanicaldesignistoproduceaprod
4、uctwhichwillserveaneedforman.Inventions,discoveriesandscientificknowledgebythemselvesdonotnecessarilybenefitpeople;onlyiftheyareincorporatedintoadesignedproductwillabenefitbederived.Itshouldberecognized,therefore,thatahumanneedmustbeidentifiedbeforeaparticularproductisdesigned.窝镓艘裂顺腰避茕说伶乾建Mec
5、hanicaldesignshouldbeconsideredtobeanopportunitytouseinnovativetalentstoenvisionadesignofaproduct,toanalyzethesystemandthenmakesoundjudgmentsonhowtheproductistobemanufactured.Itisimportanttounderstandthefundamentalsofengineeringratherthanmemorizemerefactsandequations.Therearenofactsorequation
6、swhichalonecanbeusedtoprovideallthecorrectdecisionsrequiredtoproduceagooddesign.忐姬腚崂硫吴浚扩揄锃篇讥Ontheotherhand,anycalculationsmademustbedonewiththeutmostcareandprecision.Forexample,ifadecimalpointismisplaced,anotherwiseacceptabledesignmaynotfunction.跣罱室颍惑潮盘挹溽互郴鳊Gooddesignsrequiretryingnewideasand
7、beingwillingtotakeacertainamountofrisk,knowingthatifthenewideadoesnotworktheexistingmethodcanbereinstated.Thusadesignermusthavepatience,sincethereisnoassuranceofsuccessforthetimeandeffortexpended.Creatingacompletelynewdesigngenerallyrequirest
