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冬瓜供货叫兽出品单词15’’ferrousmetals黑色金属nonferrousmetals有色金属hardnessn.硬度foundryn.铸造（车间，厂）copper-basealloys铜基合金pressn.压力机v.压锻sizingoperations精锻工艺；精加工furnacen.（熔，炼，高）炉pyrometern.高温计solderv.软钎焊meltingpoint熔点electroden.电（焊）极machiningn.切削加工grindingn.磨削加工annealingn.退火quenchn.v.淬火temperingn.回火modulusofelasticity弹性模量lowcarbonsteel低碳钢high-speedsteel高碳钢meshv.啮合；配合right-handthreads右旋螺纹pitchn.节[螺，齿]距leadn.导程rackn.齿条；导轨followern.从动件slippagen.滑动；打滑criticaln.临界点adj.批评的screwn.螺钉studn.螺栓nutn.螺母n.坚果；核心connectingrod连杆couplingn.联轴器lubricantn.润滑剂，a.润滑的leadscrew导杆；丝杆kineticenergy动能frictionn.摩擦（力）hingen.铰链washern垫圈[片]spacern.垫圈，垫片finishn.表面粗糙度twistdrills麻花钻rakeangle前角swarfn.金属屑built-up-edge切削瘤tolerancen.公差；容差torquen.扭矩chipn.切屑roughingoperation粗加工finishingoperation精加工inertian.惯性（物）；惯量linkagen.连杆（组、机构）简答轴承种类：sliding-contactbearings滑动轴承rolling-contactbearings滚动轴承angular-contactbearings角接触球轴承groove-ballbearings深沟球轴承CAD:Computer-aideddesignCAM:Computer-aidedmanufacturingCNC:ComputerisedNumericalControlDNC:DirectNumericalControl两类金属：simplemetalsalloys铸造工艺步骤：foundryprocessesFoundryprocessesconsistof①makingmolds,②preparingandmeltingthemetal,③pouringthemetalintothemolds,and④cleaningthecastings.矚慫润厲钐瘗睞枥庑赖。软钎焊工艺：solderingprocesses冬瓜供货叫兽出品Solderingistheprocessofjoiningtwometalsbyathirdmetaltobeappliedinthemolten（adj.融化的）state.聞創沟燴鐺險爱氇谴净。软焊是要用溶融状态的第三种金属来使两件金属连接在一起的工艺。材料力学特性定义：Thedefineofmaterialsmechanicalproperties残骛楼諍锩瀨濟溆塹籟。Someimportantmechanicalpropertiesofmaterialsare:酽锕极額閉镇桧猪訣锥。(1)Strength强度(intension,compression,shearandbending)彈贸摄尔霁毙攬砖卤庑。(2)Stiffness刚度(3)Ductillty延展性(4)Impactstrength冲击强度(5)hardness硬度(6)Toughness韧度齿轮种类：gearsSpurGear直齿轮HelicalGear斜齿轮straightbevel直齿锥齿轮皮带传动是否精确？为什么SmoothflatbeltsandVbeltsdependonfrictiononthepulleysandsomeslippageisinherentintheiroperation.Therefore,speedratiosarenotprecise.謀荞抟箧飆鐸怼类蒋薔。列举几种机械零件：mechanicalpartskey键spring弹簧shaft轴screw螺钉cam凸轮coupling联轴器clutch离合器worm蜗杆wormgear蜗轮键的类型：squarekey方键taperedkey锥形键woodruffkey半圆键列举磨床：grindermachinescuttergrinder工具磨床surfacegrinder平面磨床internalgrinder内圆磨床externalgrinder外圆磨床切削-各种切削方法：cuttingoperationturning车削milling铣削drilling钻孔grinding磨削boring镗孔冬瓜供货叫兽出品刀具磨损类型：flankwear后刀面磨损craterwear前刀面磨损notchwearV形凹口磨损CAD,CAM主要功能种类：majorcategoriesTheexpertsgroupCADfunctionsintofourmajorcategories:厦礴恳蹒骈時盡继價骚。(1)Geometricmodeling几何建模(2)Engineeringanalysis工程分析(3)Kinematics运动分析(4)Automateddrafting自动化绘制CAMtechnologyalsocentersaroundfourmajorareasofcategories:茕桢广鳓鯡选块网羈泪。(1)Numericalcontrol数字控制(2)Processplanning工艺加工过程(3)Robotics机器人技术(4)Factorymanagement工厂管理车床的主要部分：headstock主轴箱tailstock尾座tool-post刀架它由支承着床身和压头(ram)的底座(machineframe)，动力电源和使压头垂直于床身(atrightanglestothebed)并作直线运动的机构(mechanism)组成：鹅娅尽損鹌惨歷茏鴛賴。Itconsistsofa...