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时间:2021-05-23
《武科大机械专业英语Lesson39.pptx》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、Lesson39GearManufacturingMethodsTerminologyTexttour9/18/20211《机械工程专业英语教程》Terminology9/18/20212《机械工程专业英语教程》AnnularShapedlikeorformingaring.环形的,轮状的:形状像环或形成环状。Annulargear内齿轮,齿圈(也称为internalgear)《机械工程专业英语教程》9/18/2021Helicalgear斜齿轮3Hob滚刀9/18/2021《机械工程专业英语教程》4Worm蜗杆Wormgear1.Agearconsistingofaspirallythr
2、eadedshaftandawheelwithmarginalteeththatmeshintoit蜗轮蜗杆副2.Thetoothedwheelofthisgear,awormwheel蜗轮9/18/2021《机械工程专业英语教程》5Broach拉刀SwarfFinemetallicfilingsorshavingsremovedbyacuttingtool.小铁屑:用锉或剃等加工方法去除的细小金属屑。9/18/2021《机械工程专业英语教程》6DressingDressingistheprocessofconditioningworngrainsonthesurfaceofagrindi
3、ngwheelbyproducingsharpnewedgesongrainssothattheycancutmoreefficiently.砂轮修整:使砂轮表面磨钝的磨粒上产生新的锋利的切削刃,使其能够更有效地进行切削工作。9/18/2021《机械工程专业英语教程》7GearPlaning(刨齿)Theshapeofthespacebetweengearteethiscomplexandvarieswiththenumberofteethonthegearaswellastoothmodule(模数),somostgearmanufacturingmethodsgeneratetheto
4、othflank(齿腹)insteadofforming(采用展成法加工齿面而不是采用成形法加工).《机械工程专业英语教程》9/18/2021Texttour8Gearplaningusesareciprocatingrack(往复运动的齿条刀),stroking(击、打、切)inthedirectionofthehelix(螺旋)onagearwithagradualgenerationofformastherackeffectivelyrollsroundthegearblank(齿轮毛坯)(当齿条刀绕齿轮坯料滚切并沿其螺旋线方向运动时,齿形就会被逐渐展成).…………Therackis
5、relievedoutofcontact(脱离接触)forthereturnstrokeasinnormalshapingorplaning(与普通的刨削加工相同).Ithasthegreatadvantagethatthecuttingtoolisasimplerackwith(nearly)straightsidedteethwhichcaneasilybegroundaccurately(刀具为具有直线齿形或者接近与直线齿形的齿条,其齿面易于进行精确磨削加工).…………Thismethodislittleused(几乎不用)forhighproductionbecauseitisre
6、lativelyslowinoperationduetothehightoolandslidemass(由于刀具和滑枕的质量较大);forjobbing(重复性很小的工作)purposestheslowstrokingratedoesnotmatterandlowtoolcostsgiveanadvantagewhereunusualsizesorprofilemodificationsarerequired.(对于单件或者少量的齿轮加工而言,缓慢的行程速度带来的影响不大,而且较低的刀具成本对于那些特殊规格和需要进行齿廓修形的齿轮来说则是一个有利的条件)GearShaping(插齿)Gea
7、rshapingisinherentlysimilartogearplaning(刨齿加工)butusesacircularcutter(圆形刀具)insteadofarack(齿条刀)andtheresultingreductioninthereciprocatinginertia(运动惯性)allowsmuchhigherstrokingspeeds(行程速度);moderngearshapers(插齿机)cutti
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