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电大数控加工工艺期末复习指导考试资料小抄一、单项选择题:1.滚珠丝杠副消除轴向间隙的目的主要是( C )。A.减小摩擦力矩 B.提高使用寿命C.提高反向传动精度 D.增大驱动力矩2.切削用量三要素 中,对刀具耐用度影响程度大小依次为( C )。3.切断、车端面时,刀尖的安装位置应( B ),否则容易打刀。A.比轴中心略低一些 C.比轴中心稍高一些B.与轴中心线等高 D.与轴中心线高度无关4.用立铣刀加工内轮廓时,铣刀半径应( B )工件内轮廓最小曲率半径。A.大于 C.与内轮廓曲率半径无关B.小于或等于5.轴类零件采用V形块定位时,一个窄V形块限制的自由度数目为( C )。A.三个 C.二个B.四个 D.一个6.HSK刀柄柄部锥度为( B )A.7:24 B.1:10 C.1:5 D.1:127.螺纹千分尺用于测量螺纹的( A )。 A.中径 C.小径B.大径. D.三个都能测8.用硬质合金铰刀铰削塑性金属材料时,由于工件弹性变形的影响,容易出现(A )现象。A.孔径收缩 C.孔径扩张B.孔径不变 D.不确定9.( A )切削过程平稳,切削力波动小。A.带状切屑 B.节状切屑C .粒状切屑 D.崩碎切屑10.用切断车刀从外圆向中心切断时,其工作后角大小的变化规律为( A ) A.由大变小 B.不变 C.由小变大 D.没有规律11.为提高切削刃强度和耐冲击能力,脆性刀具材料通常选用( B ) A.正前角 C. 0度前角 B.负前角 D.任意前角12.车阶梯轴时,需选用( A )的刀具。13.工件以圆孔用单锥销定位,限制自由度数目为( B )A. 2个 B. 3个 C. 4个 D. 1个14.下列关于尺寸链叙述正确的是( C )。 A.由相互联系的尺寸按顺序排列的链环 B.一个尺寸链可以有一个以上封闭环 C.在极值算法中,封闭环公差大于任一组成环公差D.分析尺寸链时,与尺寸链中的组成数目多少无关15.零件的相互位置精度主妻限制( D ). A.加工表面与其基准间尺寸误差不超过一定的范围 B.限制加工表面的宏观几何形状误差 C.限制加工表面的微观几何形状误差 D.限制加工表面与其基准间的相互位置误差16.数控机床上精加工协30以上孔时,通常采用( A )A. 镗孔 C.钻孔 B.铰孔 D.铣孔17.采用刀具预调仪对刀具组件进行尺寸预调,主要是预调整( B )A.几何角度 c.粗糙度B.轴向和径向尺寸18.利用机械摩擦原理夹紧工件的夹紧机构中,( A )是最基本的形式.A.斜楔夹紧机构 C.偏心夹紧机构B.螺旋夹紧机构 D.压板夹紧机构19.下列叙述中,除( B )外,均可用数控车床进行加工。 A.轮廓形状特别复杂或难于控制尺寸的回转体零件 B.箱体零件 C.精度要求高的回转体类零件 D.特殊的螺旋类零件20.在下列内容中,不属于工艺基准的是( D )A.定位基准 c.装配基准B.测量基准 D.设计基准21.一面二销”定位方式限制的自由度数目为( B )A.三个 C.四个B.六个 D.五个22.数控编程时,通常用指令表示刀具.与工件的相对运动速度,其大小为( C )A.每转进给量 f C.进给速度viB.每齿进给量.fz D.线速度vc23.切削用量三要素中.对切削温度影响最大的是( C )。A.切削深度 B.进给量 C.切削速度 D.主轴转速24.车细长轴时,要使用中心架或限刀架来增加工件的( C )A.韧性 B.强度 c 刚度 D.稳定性25.精加工时切削用量的选择原则( A ),最后在保证刀具耐用度的前提,尽可能选择较高的切削速度v。 A.首先根据粗加工后余量确定ap,其次根据粗糙度要求选择较小的f B.首先选择尽可能小ap,.其次选掸较大的f C.首选择尽可能大的ap,其次选择较大的f, D.首先选择尽能小的ap,其次选择较小的f26.根据加工要求规定的( C )中间部分的平均磨损量VB允许的最大流称为刀具的磨钝标准。 A.前刀面 B.副后刀面 C.主后刀面 D.切削刃27.工件的六个白由度全部被夹具中的定位元件所限制的定位方式称为( A )。 A.完全定位 B.欠定位 C.过定位 D.不完全定位28.加工中心常按工序集中原则划分工序.( D )不是工序集中原则的优点。A.提高生产效率 B.缩短工艺路线C.保证各加工表面间相互位位置精度 D.优化切削用量29.精镗位置精度要求较高的孔系零件时,应采用( A )的方法确定竣孔路线,以避免传动系统反向问隙对孔定位精度的影晌。 A.单向趋近定位点 B.反向趋近定位点 C.双向趋近定位点 D.任意方向趋近定位点30,用硬质合金铰刀仪削塑件金属材料时,若转速太高,容易出现( A )现象。 A.孔径收缩 B孔径不变 C.孔径扩张 D.不确定31,车加凹形轮廓工件时,若刀具的( A ) 选择不当,.会造成刀具与工件发生干涉。 A.主,副偏角 B.前角C.后角 D.刃倾角32.祖车细长轴外圆时. 刀尖安装位置略高于轴中心线的目的是(B ) A.增加刚度 B.增加阻尼以减小振动 C.保证加工精度 D.提高刀具使用寿命33. 下列关于尺寸链叙述正确的是( B )。 A.由相联系的尺寸按顺序排列的链环 B.一个尺寸链中只能有一个封闭环 C.在极值算法中,封m环公差有可能小于某一组成环公差D.分析尺寸链时,与尺寸链中的组成环致目多少无关34,加工中心常采用基准统一原则加工零件.目的是保证各加工面的( A )。 A.相互位址精度 B.尺寸精度 C表面粗糙度D.形状精度35.高速钢刀具的合理前角( B )硬质合金刀其的合理前角。A.小于 B.大于 C.等于 D.与刀具材利无关36.浮动支承的主要目的是提高工件的刚性和巷定性,限制B 个自由度。A.0 B.1 C.2 D.337.加工中心上加I.螺纹时,( B 以下螺纹不宜采用机用丝锥攻丝方法加工。A.M10 C. M20B. M6 D.M3038.当零件的内腔和外形采用统一的几何类型和尺寸时,有许多优点。下列( D )不是其优点。A.减少刀具规格 c.提高生产效率B.减少换刀次数 D.保证加一精度39.车削阶梯轴时,主偏角的大小应满足( A )。40.切削用量三要素中,对切削力影响最小的为( B ).A.f B.a C.u D.一样大41.粗车细长轴外圆时,刀尖安装位置略高于轴中心线的0的是( B ).A.增加刚度 B.增加阻尼以减小振动C.保证加工精度 D.提高刀具使用寿命42.金属切削过程的三个变形区中,( C )的金属变形将影响到工件的表面质里和使用性能。A.第一变形区 C.第三变形区B.第二变形区43残留面积高度(理论粗糙度)的大小与( A )等因素有关。44.车削过程中产生的切削热主要通过( C )传散出去。A.工件 C.切屑 B.刀具 D.周圈介质45.切削铸铁等脆性材料时,容易产生 D ) 。A.带状切屑 B.节状切屑 C.粒状切屑 D.崩碎切屑46.切削用量三要素中,( B )一般根据零件的表面粗度、加工精度要求、刀具A工件材料等因素,参考切削用量手册选取。 A.背吃刀量 B进给量 C.切剖速度47.根据工件加工表面的精度要求,应该限制的自由度没有被限制的定位方式称为(B ) A.完全定位 B.欠定位 C.过定位 D.不完全定位48.不同生产类型采用的工艺装备不相同,数控机床加工不宜用于( C 。A.单件小批生产 C大批大生产 B成批生产49.采用刀具预调仪对刀具组件进行尺寸预调.主要是预调整刀具( C )。A.粗糙度 C.轴向和径向尺寸 B.几何角度50.确定数控车削加工进给路线的工作重点是确定( D )的进给路线。A.精加工 C.空行程B.粗加工 D.粗加工及空行程51.在下列手动对刀法中.( C )不仅方便,也可以得到较准确和可靠的结果.A.定位对刀法B.光学对刀法C.试切对刀法D.ATC对刀法52.切削用量三要中,对切温度影响最小的是( C )。A.切削速度C.切削深度B.进给量53.可转位面铣刀的直径已经标准化,标准直径系列的公比为( A )。A.1.25 B. 1.5 C. 2 D. 2.554.数控机床加工时,零件一次安装完成尽可能多的零件表面加工,这样有利于保证零件各表面的( A ).A相互位盆精度 C.表面粗糙度B.尺寸精度 D.形状精度55.确定外圆车刀副后刀面的空间位置的角度有( B )。56.在切削平面内测量的车刀角度是( D ).A.前角 C.楔角 B.后角 D.刃倾角57.采用短圆锥芯轴定位时,其限制自由度数目为 A )A.三个 C.五个 B.二个 D.四个58.切削刃形状复杂的刀具宜采用( D )材料制造较合适。A.硬质合金 C.陶瓷B.人造金刚石 D.高速钢59.下列哪种刀具材料硬度最高?( A )A.金刚石 C.高速钢B.硬质合金 D.陶瓷60.影响刀具寿命的根本因素是( D)。A.工件材料的性能B.切削速度C 背吃刀量D.刀具材料本身的性能61. 切削力可分解为主切削力、切深抗力和进给抗力, 消耗功率最大是(C )。A. 进给抗力B.切深抗力c.主切削力D. 不确定62. 车削时的切削热大部分由(C )传散出去。A. 刀具B.工件 C. 切屑D.空气63. 切削用量三要素矶、f 、ap 中, 对刀具耐用度的影响程度大小依次为( C)。A. a p 最大、f 次之、民最小B f 最大、Ve 次之、a p 最小C. Ve最大、f 次之、a p 最小D. Je 最大、a p 次之、f 最小64. 零件的机械加工精度主要包括(D )。A. 机床精度、几何形状精度、相对位置精度B. 尺寸精度、几何形状精度、装夹精度C. 尺寸精度、定位精度、相对位置精度D. 尺寸精度、几何形状精度、相互位置精度65. 采用两个窄V 形块定位加工轴类零件时, 其限制的自由度数目为(B )。A. 三个B.四个 C. 二个D.五个66. 采用小前角或负前角刀具, 以极低的切削速度和大的切削厚度切削延伸率较低的结掏钢时,容易产生( C)。A.带状切屑 B. 节状切屑D. 崩碎切屑C. 粒状切屑67.箱体类零件加工通常采用一面二销定位,其限制自由度数目为(D )。A. 三个B.四个C. 五个D. 六个68. 切削刃形状复杂的刀具宜采用(D )材料制造较合适。A. 硬质合金B.人造金刚石c.陶瓷B高速钢69. 租车细长轴外圆时, 刀尖的安装位置应(A ) .目的是增加阻尼作用。A. 比轴中心硝高一些B. 与轴中心线等高c.比轴中心略低一些D.与轴中心线高度无关70. 切断、车端面时, 刀尖的安装位置应( B) .否则容易打刀。A. 比轴中心略低一些B. 与轴中心线等高c.比轴中心稍高一些D.与轴中心线高度无关71. 确定外困车刀主后刀面空间位置的角度有(C )。A. 。和o C. Kr 和。 B. . 和Kr D. s 和kr 72. 下列关于尺寸链叙述正确的是(A )。A. 由相互联系的尺寸按一定顺序排列的封闭链环且一个尺寸链可以有一个以上封闭环c.在极值算法中,封闭环公差小于任一组成环公差D. 分析尺寸链时, 与尺寸链中的组成环数目多少无关73. 金属切削过程的塑性变形通常分为( B)变形区。A. 二个B. 三个 C. 四个D.五个74. 切断、车端面时, 刀尖的安装位置应(B ) .否则容易打刀。A.比轴中心略低一些B.与轴中心线等高C. 比轴中心稍高一些D. 与轴中心线高度无关75. 采用刀具预调仪对刀具组件进行尺寸预调, 主要是预调整(A )。A. 轴向和径向尺寸B. 几何角度c.粗糙度D.任意尺寸76. 下列关于尺寸链叙述正确的是(B )。A. 由相互联系的尺寸按一定顺序排列的链环B. 一个尺寸链只能有一个封闭环c.在极值算法中,封闭环公差大于各组成环公差之和D.分析尺寸链时,与尺寸链中的组成环数目多少无关77. 采用基准统一原则加工零件的好处是有利于保证各加工面的(A )。A.相互位置精度B.尺寸精度C. 表面粗糙度D. 形状精度78. 在两顶尖间测量偏心距时, 百分表上指示出的( D)等于偏心距。A. 最大值与最小值之差B. 最大值与最小值之和的一半c.最大值与最小值之差的两倍D.最大值与最小值之差的一半二、判断题:1.对于同轴度要求很高的孔系加工,可以采取刀具集中原则。( )2.加工中心是一种带有刀库和自动刀具交换装置的数控机床。( )3.由于铰削余量较小,因此铰削速度和进给量对铰削质量没有影响。( )4.可转位面铣刀直径标准系列的公比为1.5。( )5.基准重合原则和基准统一原则发生矛盾时,若不能保证尺寸精度,则应遵循基准重合原则。( )6.车削偏心工件时,应保证偏心的中心与车床主轴的回转中心重合。( )7.轮廓加工完成时,应在刀具离开工件之前取消刀补。( )8.因欠定位没有完全限制按零件加工精度要求应该限制的自由度,.因而在加工过程中是不允许的。( )9. JT/ BT/ST刀柄的定心精度比HSK刀柄高.( )10.机床坐标系和工件坐标系之间的联系是通过对刀来实现的。( )11.设计基准和定位基准重合时,不存在定位误。( )12.工件衰面粗糙度要求较高时,一般采用逆铣方式。( )13.铣削封随健槽时,应采用立铣刀加工。( )14.立铣刀长削平面轮廓时,铣刀应沿工件轮廊的切向切人,切向切出。( )15.主偏A形响刀尖N分的强度与散热条件,加大主偏角刀尖部分强度与徽热条件变差。( )16.脆性材料刀具加工离强度、高硬度材料工件时,若切削刃强度不够,易产生崩刃,因此常采用负前角刀具。( )17.抑制积屑瘤最有效的措施是控制切削速度.( )18.第一变形区是切削过程中的主要变形区,消耗大部分功率。( )19.由于积削i瘤能代替刀尖担负实际切削工作、可减轻刀具的磨损,因此不需要对其进行抑制。( )20.切削温度通常是指切屑与刀具前刀面接触区的最高温度。( )21.前角增大,切削变形城小,切削似度降低,因此前角越大越好。( )22.负前角刀具通常在用脆性刀具材料加工高强度、高硬度工件材料而当切削刃强度不够、易产生崩刃时才采用。( )23.过定位在任何情况下都不应该采用。( )24.辅助支承只能起提高工件支承刚性的辅助定位作用,而不起限制上件自由度的作用。()25.工件以圆孔用可胀心轴定位时,不存在基准位移误差。( 26.为避兔换刀时刀其与工件发生干涉。换刀点一般应设在工件的外部。( )27.加工表面的设计基准和定位基准重合时,不存在基准位移误差。( )28.在铣床上加工表面有硬皮的毛坯零件时,应采用逆铣方式。( )29.铰孔时,无法纠正孔的位置误差。( )30.数控机床常用的对刀方法有试切对刀法、光学对刀法、ATC自动对刀法等,其中试切法可以得到更加准确和可靠的结果。( )31.背吃刀量根据工件加工余量进行选择的,并与机床功率和刚度有关.( )32.可转位式车刀用钝后,只需票将刀片转过一个位置,即可使新的刀刃投人切削。当几个刀刃都用钝后,更换新刀片。( )33.在高温下,刀具切削部分必须具有足够的硬度,这种在高温下仍具有足够硬度的性质称为红硬性。( )34.平行度、对称度同属于形状公差.( )35. 加工表面的设计基准和定位基准重合时, 定位误差为0 (X)36. 高速钢刀具的合理前角小于硬质合金刀具的合理前角。(X )14. 基准重合原则和基准统一原则发生矛盾时, 若不能保证尺寸精度, 则应遵循基准统一原则。(X )37. 钻削加工时, 轴向力主要是由横刃产生的。(.J )38. 高速钢镰刀伎削铸铁时, 由于铸件内部组织不均匀引起振动, 容易出现孔径收缩现象。( )39. 一般情况下, 夹具元件的制造误差为被加工零件允许误差的1/31/5o (.J )40. 刀具切削部分必须具有足够的硬度, 这种在高温下仍具有足够硬度的性质称为刚性。(.J )42. 数控机床上精加工c/l 3 0 以上孔时, 通常采用锺孔。(.J )20. 一个尺寸链可以有一个以上的封闭环。( )43. 加工表面的设计基准和定位基准重合时, 基准位移误差为0.( X ) ( )44. 第二变形区是切削过程中的主要变形区, 消耗大部分功率。(X )45. 选择较大的进给速度加工零件时, 可减小已加工表面粗糙度值。(X )46. 金刚石刀具主要用于加工各种有色金属和非金属。(.J )47. 过定位不是在任何情况下都不可以采用。(.J)48. 工件以圆孔用可胀心轴定位时, 不存在基准位移误差(.J )49. 背吃刀量根据工件加工余量进行选择, 而且与机床功率和刚度有关。(.J )50. 镜削封闭键槽时, 应采用键槽刀加工。(.J )51. 加工表面的设计基准和定位基准重合时, 定位误差为(X )( )52. 第一变形区是切削过程中的主要变形区, 消耗大部分功率。(.J )53. 高速钢刀具的合理前角小于硬质合金刀具的合理前角。(X )54. 辅助支承只能起提高工件支承刚性的辅助定位作用, 而不起限制工件自由度的作用。(.J)三、简答题:1. 从机械加工的角度考虑,加工中心上加工的零件,其结构工艺性应具备哪些要求?答,零件的切削加工量要小。零件上光孔和螺纹的尺寸规格尽可能少。零件尺寸规格尽最标准化。零件加工表面应具有加工的方便性和可能性。零件结构应具有足够的刚性。2.粗、精加工时切削用量的选择原则是什么?答.粗加工时切削用量的选择原则:首先选取尽可能大的背吃刀量;其次要根据机床动力和刚性的限制条件等,选取尽可能大的进给量.最后根据刀具耐用度确定最佳的切削速度。 精加工时切削用的选择原则:首先根据粗加工后K余it确定背吃刀量,其次根据巳加工表面的粗糙度要求,选取较小的进给量。最后在保证刀具耐用度的前提下,尽可衡选取较高的切削速度。3 划分加工阶段的目的是什么?答:划分加工阶段的目的是:保证加工质量;合理使用设备,便于及时发现毛坯缺陷,便于安排热处理工序。4.从机械加工的角度.考虑,加工中心上加工的零件,其结构工艺性应其备哪些要求?答:零件的切削加工量要小。零件上光孔和螺纹的尺寸规格尽可能。零件尺寸规格尽量标准化。切零件加工表面应具有加工的方便性和可能性。零件结构应具有足够的刚性。5.数控刀具材料主要有哪几类?答:答:高速钢,硬质合金;陶瓷;立方氮化硼(CBN);金刚石6.确定加工余量时,应注意哪些问题? 答:采用最小加工余量原则;余量要充分,防止因余量不足造成废品;余量中应包含热处理引起的变形,大零件取大余量,毛坯余量和工序余量要分别确定。7.粗基准的选择原则是什么?答:相互位置要求原则;加工余量合理分配原则;重要表面原则,不重复使用原则;便于工件装夹原则.8. HSK 刀柄与7 : 24 锥柄相比, 有何优点?答: 定位精度高; 静态、动态刚度高; 适合高速加工; 重量轻、尺寸小、结构紧凑;清除污垢方便。四、计算题:1、 图示零件,镗孔前A,B,C面已经加工好。镗孔时,为便于装夹,选择A面为定位基准,并按工序尺寸L4进行加工。已知L1 = 2800 +0. l mm, L2 = 800-0. 06 mm, L3 =100士0. 15mm。试计算L4的尺寸及其偏差。2、外圆车刀 要求绘制刀具示意图并标注上述几何角度。3、.试分析下图中夹紧力的作用点与方向是否合理?为什么?如何改进?答:图a不合理,因为力作用处工件刚度差,容易变形,图b不合理,因为工件容易倾翻;图c不合理,因为力作用处工件刚度差,容易变形,图d不合理,因为工件容易倾翻。改进方案见下图4、图所示为轴套零件图,不便测量,试计算工序尺寸A,及其偏差。5、端面车刀,要求绘制刀具示意图并标注上述几何角度。答:6、试分析图中的定位元件分别限制了哪些自由度?是否合理?如何改进?答:7、左图所示为轴类零件图,其内孔和外圆和各端面均已加工好,试计算右图所示定位方案加工时的工序尺寸A3及其偏差。解:绘制尺寸链8、试分析图中的定位元件分别限制了哪些自由度?是否合理?如何改进?9. 下图所示套筒, 除缺口B 外, 其余各面都已加工好。A l = 70-0.04 mm,Ao=15 土O . 05mm,A2 =400O.03 mm , 以端面A 定位加工缺口时, 计算尺寸A 3 及其公差。解:解: A。为封闭环, A o = A 2 + A 3 - A I , A2 、A3 为增环, A I 为减环A3=Ao+AI-A2=15+70-40=45mm0.05=0.03+ESA3 -( -0.04),ESA3 = -0.02 mm-0.0 5 = 0+ EIA3 -0 , EIA3 = -0.05 mmA3=45-0.05-0.02mm10.下图所示零件, A1 =150+0.03 ,A 2=75 土0 . 0 4 , 加工B 面时, 因A2 不便于测量, 试计算工序尺寸A 3 及其公差。解: A2为封闭环, A 2= A3 - A 1 , A 3 为增环, .A 1为减环A 3=A1十A2=15 十7 5 = 90mmO. 04=ESA3 -0,ESA3 =0. 04mm一0.04 = EIA 3 一0 . 0 3 , EIA3 =一O . O l m mA3 = 90-0.01+0.04mm请您删除一下内容,O(_)O谢谢!2015年中央电大期末复习考试小抄大全,电大期末考试必备小抄,电大考试必过小抄After earning his spurs in the kitchens of The Westin, The Sheraton, Sens on the Bund, and a sprinkling of other top-notch venues, Simpson Lu fi nally got the chance to become his own boss in November 2010. Sort of. The Shanghai-born chef might not actually own California Pizza Kitchen (CPK) but he is in sole charge of both kitchen and frontof- house at this Sinan Mansionsstalwart. Its certainly a responsibility to be the head chef, and then to have to manage the rest of the restaurant as well, the 31-year-old tells Enjoy Shanghai. In hotels, for example, these jobs are strictly demarcated, so its a great opportunity to learn how a business operates across the board. It was a task that management back in sunny California evidently felt he was ready for, and a vote of confi dence from a company that, to date, has opened 250 outlets in 11 countries. And for added pressure, the Shanghai branch was also CPKs China debut. For sure it was a big step, and unlike all their other Asia operations that are franchises, they decided to manage it directly to begin with, says Simpson. Two years ago a private franchisee took over the lease, but the links to CPK headquarters are still strong, with a mainland-based brand ambassador on hand to ensure the business adheres to its ethos of creating innovative, hearth-baked pizzas, a slice of PR blurb that Simpson insists lives up to the hype. They are very innovative, he says. The problem with most fast food places is that they use the same sauce on every pizza and just change the toppings. Every one of our 16 pizza sauces is a unique recipe that has been formulated to complement the toppings perfectly. The largely local customer base evidently agrees and on Saturday and Sunday, at least, the place is teeming. The kids-eat-for-free policy at weekends is undoubtedly a big draw, as well as is the spacious second-fl oor layout overlooked by a canopy of green from Fuxing Park over the road. The company is also focusing on increasing brand recognition and in recent years has taken part in outside events such as the regular California Week. Still, the sta are honest enough to admit that business could be better; as good, in fact, as in CPKs second outlet in the popular Kerry Parkside shopping mall in Pudong. Sinan Mansions has really struggled to get the number of visitors that were envisaged when it first opened, and it hasnt been easy for any of the tenants here, adds Simpson. Were planning a third outlet in the city in 2015, and we will probably choose a shopping mall again because of the better foot traffic. The tearooms once frequented by Coco Chanel and Marcel Proust are upping sticks and coming to Shanghai, Xu Junqian visits the Parisian outpost with sweet treats. One thing the century-old Parisian tearoom Angelina has shown is that legendary fashion designer Coco Chanel not only had style and glamor but also boasted great taste in food, pastries in particular. One of the most popular tearooms in Paris, Angelina is famous for having once been frequented by celebrities such as Chanel and writer Marcel Proust. Now Angelina has packed up its French ambience, efficient service, and beautiful, comforting desserts and flown them to Shanghai. At the flagship dine-in and take-out space in Shanghai, everything mimics the original tearoom designed from the beginning of the 20th century, in Paris, the height of Belle Epoque. The paintings on the wall, for example, are exactly the same as the one that depicts the landscape of southern France, the hometown of the owner; and the small tables are intentional imitations of the ones that Coco Chanel once sat at every afternoon for hot chocolate. The famous hot chocolate, known as LAfricain, is a luxurious mixture of four types of cocoa beans imported from Africa, blended in Paris and then shipped to Shanghai. Its sinfully sweet, rich and thick as if putting a bar of melting chocolate directly on the tongue and the fresh whipped cream on the side makes a light, but equally gratifying contrast. It is also sold in glass bottles as takeaway. The signature Mont-Blanc chestnut cake consists of three parts: the pureed chestnut on top, the vanilla cream like stuffing, and the meringue as base. Get all three layers in one scoop, not only for the different textures but also various flavors of sweetness. The dessert has maintained its popularity for a century, even in a country like France, perhaps the worlds most competitive place for desserts. A much overlooked pairing, is the Paris-New York choux pastry and N226 chocolate flavored tea. The choux pastry is a mouthful of airy pecan-flavored whipped cream, while the tea, a blend of black teas from China and Ceylon, cocoa and rose petals, offers a more subtle fragrance of flowers and chocolate. Ordering these two items, featuring a muted sweetness, makes it easier for you to fit into your little black dress. Breakfast, brunch, lunch and light supper are also served at the tearoom, a hub of many cultures and takes in a mix of different styles of French cuisines, according to the management team. The semi-cooked foie gras terrine, is seductive and deceptive. Its generously served at the size and shape of a toast, while the actual brioche toast is baked into a curved slice dipped with fig chutney. The flavor, however, is honest: strong, smooth and sublime. And you dont actually need the toast for crunchiness. This is the season for high teas, with dainty cups of fine china and little pastries that appeal to both visual and physical appetites. But there is one high tea with a difference, and Pauline D. Loh finds out just exactly why it is special. Earl Grey tea and macarons are all very well for the crucial recuperative break in-between intensive bouts of holiday season shopping. And for those who prefer savory to sweet, there is still the selection of classic Chinese snacks called dim sum to satisfy and satiate. High tea is a meal to eat with eye and mouth, an in-between indulgence that should be light enough not to spoil dinner, but sufficiently robust to take the edge off the hunger that strikes hours after lunch. The afternoon tea special at Shang-Xi at the Four Seasons Hotel Pudong has just the right elements. It is a pampering meal, with touches of luxury that make the high tea session a treat in itself. Whole baby abalones are braised and then topped on a shortcrust pastry shell, a sort of Chinese version of the Western vol-au-vent, but classier. Even classier is the dim sum staple shrimp dumpling or hargow, upgraded with the addition of slivers of midnight dark truffles. This is a master touch, and chef Simon Choi, who presides unchallenged at Shang-Xi, has scored a winner again. Sweet prawns and aromatic truffles whats not to love? His masterful craftsmanship is exhibited in yet another pastry a sweet pastry that is shaped to look like a walnut, but which you can put straight into the mouth. It crumbles immediately, and the slightly sweet, nutty morsel is so easy to eat youll probably reach straight for another. My favorite is the dessert that goes by the name yangzhi ganlu, or ambrosia from the gods. The hotel calls it chilled mango cream with sago, pomelo and birds nest made with ingredients that resonate with every female soul. It does taste like ambrosia, with the sweet-sour fragrance of the mango forming the first layer of taste and sensation, and the pomelo sacs and sago pearls providing the tactile contrast. The birds nest its the ingredient that gilds the lily, since it is supposed to nourish and nurture a perfect complexion. For those unfamiliar with this exotic ingredient, the birds nest is not a bundle of twigs, but is, instead, the dried secretion that cave swifts use to build their nest. Technically, its bird saliva, but the Chinese believe that it has collagen-boosting properties essential to beauty. To me, it just tastes good, adding a slight gelatinous crunch to the back of the teeth. There is also a baked mushroom puff pastry that includes the highly prized Matsutake or pine mushroom. You also get a choice of teas, but I strongly recommend the aged Puer from Yunnan province. It is a mellow tea that will go perfectly with the rich little nuggets, and will warm you up on a cold afternoon. Incidentally, the general guide is green tea such as Longjing or Dragonwell for the hot season, semi-fermented teas like Wu-long or Iron Buddha for autumn, and more warming teas like Puer for winter. The Shang-Xi afternoon tea costs 228 yuan ($37) per person, and 388 yuan for the more opule
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