关于可机加工性的论述机械加工类中英文翻译、外文翻译、外文文献翻译.pdf

英文原文：

Onthediscussionofthemachinability

Abstract:Thepaperisabouttheconceptofmamufacturingengineeringandthewaysofprocessingit.It

explainsthefoundamentalconceptofmanufacturingengineeingfromthewayofexampleandalsoofferus

somekondsofmaterialscanbeusedinmanifacturingengineering.

Keywords:manufacturingengineering、mterial、concept

译文：

20.9MACHINABILITY

Themachinabilityofamaterialusuallydefinedintermsoffourfactors:

1、Surfacefinishandintegrityofthemachinedpart;

2、Toollifeobtained;

3、Forceandpowerrequirements;

4、Chipcontrol.

Thus,goodmachinabilitygoodsurfacefinishandintegrity,longtoollife,

andlowforceAndpowerrequirements.Asforchipcontrol,longandthin(stringy)

curedchips,ifnotbrokenup,canseverelyinterferewiththecuttingoperation

bybecomingentangledinthecuttingzone.

Becauseofthecomplexnatureofcuttingoperations,itisdifficultto

establishrelationshipsthatquantitativelydefinethemachinabilityofa

material.Inmanufacturingplants,toollifeandsurfaceroughnessaregenerally

consideredtobethemostimportantfactorsinmachinability.Althoughnotused

muchanymore,approximatemachinabilityratingsareavailableintheexample

below.

20.9.1MachinabilityOfSteels

Becausesteelsareamongthemostimportantengineeringmaterials(asnoted

1

inChapter5),theirmachinabilityhasbeenstudiedextensively.The

machinabilityofsteelshasbeenmainlyimprovedbyaddingleadandsulfurto

obtainso-calledfree-machiningsteels.

ResulfurizedandRephosphorizedsteels.Sulfurinsteelsformsmanganese

sulfideinclusions(second-phaseparticles),whichact