數(shù)控銑削期末復(fù)習(xí)題及答案

1、LearnGenea Se cetay on "wo t oearna" steg hei gfu Ccnsciusesses"mportatspeecastongIe cut*me wachig、. te e" the orgnofbudiig the party back t .power, I ow to stegte i sevi cesfor Ie masses, m rove paly chesin, fg hig t be cme the grasrot s party members a nd masses c Gassr oos par

2、ty ogaizti ons "w" s tstegghen the sev ofay members and-d- t he pi i nee spit Dstiuknolggasroot spaty organi zains i al wa Is of pe oie , cit hig , Se le, w hch be ongs tote ne ve ed ngs of Ie party organlal on a d cmmes e lUaton ha s a die c pe.n of Ie masses.Stegtenthepar, ahe ai of Ie I

3、e da- spat, stegt I ele pay members and es、 does not I ave to be me" and "te firs to bearhadships,theastto" serve sii to se t Ie pays post mage among the pepe s mporant. Gas roospayogaiztons"w"sto-nsealpeopenot ha piy not tose e "stereotype s", esaasthe hones atul

4、dlget atfr Iepepe.Nonee.toavdmentioningthatsomemembersofupartycainotsa.Ie"money"cros n,XuZhouschabuuea nd crut b> bey, m.esace bores ad ras. T-w, ist" Xu,Zhou、 si uton t o Ie Ie pays frrsh a nd naua, slid a ndhonnst wrk sye.C-asig "ae, , cad"unesiabeadbehhviu."cIis,

5、had a nd cl d, push" ati 、- . Ga -roots paly orggazai ons"two" is I sengt he t he - nne of or dinay pay membes patcipatng i conncioosne , uity cns»osne For rrasns known,m-besofga-rots pay banchs e ss mob。，e - esurre s ad the cnstrcin if pay orgaZIons' sme、.，-sisfofocusontIegr

6、ssrootsparybanchhs、ooe, sft, losl" prbem, Id-nnetheparym-besand-drs, " gag working", "Hong Kng re|ot"Stog ceaup a cions syle a I d ambi ng, pe sumpt uous、nq - l led" pay membespasseialatet m-besadcadrsjinigpayoftoogI" em."arybblding"sobainndintelongtemde-

7、lopmet of our pays hisorial-pee nce ac - mulae d Tw is I ur paly unde Ie new hi stria cndit ons, sengt hen the parys constucIInofanew"ecficatonmovlment"Ga-rots payor.niat ons sou daay cac Ie har d wrk e lu m ore ntd. Two educai onal oucom - ae l I ng tem oriee d ad be come an im porat impe

8、us for Ie work T-w" soud havethrrekids of consc oosne - "w" sudy a nd e ducain, ba sc lea I ig le s ite doing. Only the Consiuton a em theseesofparyrrlesanddosldw or、be quaie d pay m - bes hhd a sold i 一ologial bas s Oy the "lea nig" ad、o" ea unit, I fma "eaneandod

9、" Ie vruos cyce, a I d utmy ac thefunamenalob|ectveofld . ai on. T hs e ques tha the Oga nizain一、判斷題1 .圓弧插補中，對于整圓，其起點和終點相重合，用 R編程無法定義，所以只能用 圓心坐標(biāo)編程（V ）2 .安裝銃床虎鉗時，應(yīng)校正鉗口之平等度及垂直度。V3 .使用銃床虎鉗夾持工件時，可使用合成樹脂或軟質(zhì)手捶敲打工件，以確實定位。4 .G代碼可分為模態(tài)G代碼和非模態(tài)G代碼。V5 .在銃床虎鉗底部涂抹一些機油，才安裝于床臺是良好的工作習(xí)慣。V6 .通常在命名或編程時，不論何種機床都一律假定工

10、件靜止刀具運動。V7 .數(shù)控機床適用于單品種，大批量的生產(chǎn).X8 .一個主程序中只能有一個子程序。X9 .子程序的編寫方式必須是增量方式。X10數(shù)控機床在輸入程序時，不論何種系統(tǒng)坐標(biāo)值不論是整數(shù)和小數(shù)都不必加入小數(shù)點。X11粗銃削與精銃削之主軸轉(zhuǎn)速應(yīng)相同。X12 .CNC銃床由于可以依程序自動加工，因而工件夾持的方式不會影響工件準(zhǔn)確度。X13 .端銃刀之端面與柱面均有刃口。V14 .Y坐標(biāo)的圓心坐標(biāo)符號一般用K表示。XLearn General Se cetay on "wo t o-rna" steg hei gfu Ccnsciusesse s mportat spee

11、c.au a st ong Ie cut*me wachig、. te e" the orgnofbudii g the party back t .power, I ow to stegte i sevi cesfor Ie masses, m rove paly chest，fg hig t be cme the grass roots party members a nd masses c Gassr oos party ogaizti ons "w" s t stegghen the seVc ofay members andcadre,t he pi i

12、 nee spit Dstiuin of ga_root spay organi zains i al wa Is of pe oib , hig , Se le, w hch be . tote ne ve ed ngs of Ie pay organlal on a d cmmes e jua.nha s a die c pe.n of Ie masses.Stegten the par, ahe ai of Ie Ie da- spat, stegt I ele pay members andes、 does not have to be me" an d "he i

13、s tobeahadships,the a st to" serve sii to se t the patys poslve mage among the pe，e s mporant. Gas roospayogaiztons"w"sto-nseal peope not ha piy not tose e "stereotype s", esaasthe hones atul d 、"-' Ie people. No need to avd mentioningthat,somememberso',partycai

14、notstandIe"money"crros n,XuZhouschabuueandcr.tb>bey,m. ace bores ad ras. T-w, is t" Xu, Zhou、 sluin t o Ie Ie pays frrsh a nd na.a, sld a ndhonnst wrk sye.C-asig "ae, , cad" unesia be ad be hhviu. "c I is, had a nd cl d, push" ati 、- . Ga -roots paly orggazai on

15、s"two" is I sengt he t he - nne of or diay pary m - bes, paiCpaing i conncioosne , uiy cnsUusnesL For rrasns known, m - bes of ga-rots pay banchhs e ss mobie, e - esurre s ad the cnstrcin if pay orgaiatonsla_ sme、.，.s' to focus on t he ggrssroot s pary ba nchhs，ooe, sft, losl" prb

16、em, Id-nnethe pary m - bes a nd iad_,、gag workig", "Hong Kng re|ot"StogCeaupaCinssyleaIdambi ng, pe sumpt uous、nq - l ife." pay membespass atet m-besadca drs ji nig pay of toog I em."arybbldig"sobainndintelongtemde-lopmet of our pays hisorial-pee nce ac - mulae d Tw s I

17、 ur paly unde Ie new'i stria cndI ons, sengt hen the pa" constuCIInofanew"ediat on movlme nt" Ga- rots pay organiat ons so, dHis cac Ie har d wr、e lu - ore ntd. Two educai onal oucom - ae l I ng tem oriee d ad be come an im porat mpeus for Ie work T-w" soud hhve thrre kins of

18、 consc oosne - "w" su. a nd e ducaton, ba sc lea I ing lie s inte doing. Oy the Cons'in a - em theseiesofparyrrlesanddosldwor、be qualfie d pay m - bes hhd a sold i olgial bas s Oy the "lea ning" ad、o" ea unit,tfma-reandod"Ie-ruoscyce,aIdutmaeyacie-ethefunamenal ob|e

19、 ctve of ld . ai on. T his e ques tha the Oga nzain15 .非模態(tài)指令只能在本程序段中有效。V16 .順時針圓弧插補（G02）和逆時針圓弧插補（G03）的判別方向是：沿著不在圓弧平面內(nèi)的坐標(biāo)正方向向負(fù)方向看去，順時針為G02,逆時針為G03.V17 .端銃刀無法用于銃削溝梢及輪廓加工。V18 .銃刀刀柄裝入主軸前，必先清潔刀柄及主軸內(nèi)孔。V19 。.溝梢銃削時，為使切屑容易排出，宜使用螺旋刃端銃刀。V20 .銃削中發(fā)生緊急狀況時，必須先按緊急停止開關(guān)。V21 .在可能情況下，銃削平面宜盡量采用大直徑銃刀。V22 .面銃刀的切除率多大于端銃刀。V

20、23 .端銃刀可以銃削盲孔。X24 .切削速度會顯著地影響刀具壽命。V25 .銃刀材質(zhì)一般常用調(diào)整鋼或碳鋼。V26 .鑄鐵工件宜采用逆銃削。X27 .銃刀直徑100mm，以25m/min速度銃削，其轉(zhuǎn)速為 40r/min. X28 .一個主程序調(diào)用另一個主程序稱為主程序嵌套。X29 .數(shù)控機床的鏡像功能適用于數(shù)控銃床和加工中心。V30 .在輪廓銃削加工中，若采用刀具半徑補償指令編程，刀補的建立與取消應(yīng)在輪廓上進(jìn)行，這樣程序才能保證零件的加工精度。X31 .數(shù)控機床中，所有的控制信號都是從數(shù)控系統(tǒng)發(fā)出的。X32利用G92定義的工件坐標(biāo)系在機床重開機時仍然存在。X33 .M00表示暫停加工程序。X

21、LearnGeneralSe cretaryon "two t olearna" strengt hening "fourConsciousnesse s" important spee chcauseda str ong reacti on inthe country.ime,watching "redtreasure",the origin ofbuildi ng the party backt opower, howto strengthe nservi cesforthe masses,im proveparty cohesi

22、on,fig hting to be come t he grass -root sparty membersa ndmasses hottopi c. Grass-r oots partyorganizati ons "two"is to strengthentheservice of partymembers and cadres,t hepi oneerspirit. Distributionofgrass-rootsparty organi zations in allwa lksofpe ople ,clot hing ,she lter,w hich bel o

23、ngs t othe ner veendi ngs ofthe party organizati onand comments re putation ha sa dire ctperception ofthemasses.Strengthen thepartyahe adofthe "pe dal" spirit;strengt henthe partymembers and cadres"success does not haveto be me" and"thefirstto bearhardships,thelastto" s

24、ervice spirittose ttheparty's positive imageamong thepeople is important.Grass-roots partyorganizati ons "two" is to clea nse all people notha ppynot to se e "stereotype s",establishthe honestfaithful,diligentfaithforthepeople.Noneedto avoid mentioni ngthat,some membersofourp

25、arty cannotstandthe "money," corr osi onoftemptation, thi n, XuZhou, such abuse a nd corrupt bri bery,malfeasance borers, andrats.Two,istocleanup,thin,Xu,Zhou's sol ution t o restore the party'sfresha nd natural, solid a nd honestworkstyle.Cleansing"take,eat,card," undesi

26、ra ble andbe haviour,"cr oss, hard a nd col d, push" atti tude.Gra ss-roots party organizati ons"two" istostrengt hen t he se nse ofor dinary partymembers,participatinginconsciousness,unityconsciousness.For reasons known, members ofgrass-rootsparty branches le ssmobile,le ss reso

27、urce s,andthe construction ofpartyorganizationshavesomelag.Two studies,istofocus ont hegrass -root s partybra nches"loose,soft,loose"problem,advancethe partymembers a nd cadres,"a gangworking","Hong Kong report."Strongcleanup a ctions,stylea nd rambli ng,pre sumpt uous

28、"unqual ified"party members,paysspecialattentiontopartymembersand ca dres"joi ning party ofthoug ht" probl em."Partybuil ding"is obtai nedi n thelong-term development of our party'shistoricalexperienceaccumulated.Twoisour party underthe newhi storicalconditi ons,str

29、engt henthe party'sconstructionofanew "rectificationmoveme nt." Grass -roots party organizati onsshoul dalways catch thehar d work,re sults-orie nted. Twoeducati onal outcomes arel ong-term oriente dand be come an im portantimpetusforthework. "Two" should havethreekinds ofcon

30、sci ousness "two" studya nde ducation,ba sic lear ning lie s in the doi ng.Onlythe Constitution address theseries ofpartyrules, a nd do solid w ork, be qualifie dparty members had asolid i de ologicalbasi s.Onlythe "lear ning"and "do" real unity, to forma "learn-le

31、ar n-do-do" thevirtuous cycle,a nd ultimately achieve thefundamental obje ctiveofeducati on.T his re quirest hatthe Orga nization34 .M01 M03都表示主程序結(jié)束，并且都能返回程序起始位置。X35 .G90 G01 X0 Y0 與 G91 G01 X0 Y0意義相同。X36 .只有當(dāng)工件的六個自由度全部被限制時，才能保證精度。 X37 .銃削是屬于連續(xù)切削加工。X38 .同一工件，無論用數(shù)控機床還是普通機床加工，具工序都一樣。X39 .銃削長方體，經(jīng)一

32、次裝夾后即可完成六個面加工。X40 .操作數(shù)控機床時，在開機后回零的目的是為建立工件坐標(biāo)系。X二選擇題1 . 聯(lián)動軸數(shù)是指（C ）A.數(shù)控機床的進(jìn)給驅(qū)動系統(tǒng)B.數(shù)控機床的進(jìn)給軸和主軸總數(shù)C.能同時參與插補運算的軸數(shù)2 .通常情況下，平等于機床主軸的坐標(biāo)軸是（C ）A.X 軸B.Y 軸 C.Z 軸3 .下列控制系統(tǒng)中帶檢測裝置，且檢測裝置在機床移動部件上的是（C ）A.開環(huán)控制系統(tǒng) B.半閉環(huán)控制系統(tǒng) C.閉環(huán)控制系統(tǒng)4 .選擇切削用量時，通常的選擇順序是（C ）A.切削速度背吃刀量進(jìn)給量B .切削速度進(jìn)給量背吃刀量C.背吃刀量進(jìn)給量切削速度5 .輔助功能指令M 0 5代表（ C ）earnin

33、ge ducation,nee dthree ki nds ofconsciousne ss: one i stoestabli sh an integratedaware ness."Lear ning" and"do"what car isTwo-w heel, bird wi ngs, needtog oha nd in hand, onee nd ca n be neglected. Communistthe oreticia nand man. Onlyby closelycom bini ng the oryand practi cetoge

34、the rin ordertotr uly realize the irvalue."Le arning"is theF oundati on,t he Foundati on i s notstr ong,shaki ng; " "Isthe keytonettonetthousa nds ofaccounts. "Two"education,"" laythe basi s,goi ngto"do"the keygrip, so thatt he "learni ng"

35、and "doing" ba cktostandard, sothatt he majority ofpartymembers "learn" learni ngthe ory ofnutrie nts,i n the"doing" practi ce party's pur poses.Se cond,toe stablish ase nse ofdept h."Lear ning"and "do" not Chu drawn,entirelydifferent,buttheorgan

36、i c unityofthewhole. "Two" lear ning educati on, wenee dtoexpl ore integrating "lear ning" in "do",exhibit "do" in "Science".Toavoi dthe "learni ng" intosim ple room i nstruction, "do" into a monotone fordoi ng. Should ex ploratio

37、n "learn" inthe has"do", "do" in thehas "learn"ofeducationand practi ceofcarrie r, makes generalgrass-r ootsmembers ca n in "learn" in t he ha s"do"ofachieveme ntsse nse,i n "do" inthe has "lear n"ofget sense,rea lmakesp

38、artyofthe ory brain i nto heart, put for peopleservi ceconcept outsi deofYu shape d.T hird,toa dhereto long-term theawareness.Styleconstructi on onthe r oadforever,"two"had tocatchthelong-term."Two"studyandeducation, by no mea ns, assault -st yle wind-sport, butthe re curre ntedu

39、cationwithi n the party. Inrece ntyears,the party's massli needucati on practiceand "three-three"spe ciale ducati on i n grass-root s bor ne rich fruits,vastnumber sof partymembers a nd ca dres wit hstood thebapti sm ofthespirit. "Two"greater needt ofocus on longerhold l ong-

40、term,toestabl ish a nd perfectthe effective mechanism oftheeducati on,focusingon the creation oflong -term educati on,striveto makethe vastnum berofparty memberstomaintain theirvanguar dColor, maintain theparty's adva nce d nat ureand purity.Aware ness -raisi ng,ante nnas a nd atmosphereadi scus

41、si on on how lea ding cadres of party members "two" current,"two"activity is i n fullswing up and dow nthe country, party cadre s as a"keyminority" is botha bar ometerand im petus.The "two"meani ng enoug hde ep,is t o determine thepartycadres canresolveto stud

42、yhar dfirst. Inthe "two"inthe process, some cadres ofhimself,standi ng long,hig h aware ness,t hatConstituti on Partyrulesis simple, its not w orthbotheri ngsome party cadre s think speak series has nothi ng todowith thegrass-r ootsw ork,waterbusi ness lear ning series of spee ches see n a

43、swi ndow dressing.These "lazy, casual ,and de cade nt"ideas lear ning la cks motivation,aseri ousimpedime ntto"two" effect.JohnStuartMilloncesaid,onlyabasicelement of humant houghtpatterns change dramatically, huma ndesti nycan make great improv ement.Thesame,onlypartymember s an

44、dA .主軸順時針旋轉(zhuǎn)B .主軸逆時針旋轉(zhuǎn) C .主軸停止6 .下列（C ）是建立工件坐標(biāo)系指令A(yù).G53 B. G40C.G557 .用數(shù)控銃床加工較大平面時，應(yīng)選擇（ B ）A .立銃刀B.面銃刀C .鼓形銃刀8 .從子程序返回到主程序用（ C ）A .M98B.G98C. M999 .取消刀具半徑補償指令是（B ）A. G 53B . G 40C . G 4910 .數(shù)控銃床旋轉(zhuǎn)軸之一的B軸是繞（ B ）旋轉(zhuǎn)的軸A. X軸 B . Y軸 C. Z軸11 .圓弧插補指令G 03 X Y R 中，XY后的值表示圓弧的（ B ）A.起點坐標(biāo)值B.終點坐標(biāo)值C.圓心坐標(biāo)相對于起點的值12 .銃刀

45、直徑為50mm,銃削鑄鐵時其切削速度為20m/min,則其主軸轉(zhuǎn)速為（B ）A. 60r/minB.120r/minC.240r/min13 .數(shù)控機床中把脈沖信號轉(zhuǎn)換成機床移動部件運動的組成部分稱為（ C ）A .控制介質(zhì)B .數(shù)控裝置C .伺服系統(tǒng)14 .加工中心與數(shù)控銃床的主要區(qū)別是（ C ）A.數(shù)控系統(tǒng)復(fù)雜程序不同B .機床精度不同C.有無自動換刀系統(tǒng)15 .G02 X20Y20 R10 F100,所加工的一般是（ C ）A.整圓 B .夾角小于180度的圓弧 C.夾角大于180度小于360的圓弧temptatiLoen,atrhniGeneralSn,eXuZcrheotua,rys

46、uocnh"atbwuoste aolearna" strengt hening "fourConsciousnesse s" important nd corrupt bri bery,malfeasance borers, andrats.Two,ispee chcauseda str ong reacti on inthe country.stoclea nup, thi n,Xu,Zhou's sol ution t o restore theparty'sfriemseh,awatchingnd"rendattruer

47、aals,usroel"i,dtahe origind honestwornkosftybluei.lding the party backt opower, howto strengthe nservi cesforthe masses,im proveparty cohesion,fig hting to be come t he grass -rootCleansing"take,eat,car d," undesira ble andbe haviour,"cr oss, hard a nd col d, push" atti tude

48、.Gra ss-roots party organizati onalways catchroot sparty membersach theharndmasses hottopi c. Grass-r oots partyorganizati ons "two"is to strengthentheservice of partymembers and cadres,t hepi oneerspirit. Distributionofhen t he se nse ofor dinary partymembers,participating in consci ousne

49、 ss,unityconsciousness. For reasons known, members ofgrass-rootsparty1- n _ I_ I 一一. . . I. I. L I -IId work,re sults-orie nted.Twoeducational outcomes arelong-term orientedand be come an im portantimpetusforthework. "Two" should havethree kindsgrass-root s party organi zations in allwa lk

50、sofpe ople ,clot hing ,she lter,w hich bel ongs t othe nerbranches le ssmobile,le ss resource s,andthe construction ofpartyorganizationshavesomelag.Two studie.I _ I _ 一 I _ , . L . I- - L -一-ofconsci ousness "two" studyaveendinde ducation,ba sic lear ning lie s in the doi ng.Onlythe Consti

51、tution address tngs ofthe party organizati onand comments re putation ha sa dire ctperception ofthemasses.Strengthen theps,isto focus ont hegrass -root s partybra nches"loose,soft,loose"problem,advancet he partymembers a nd cadresI . >.1I>_ 一一一 一 .一 . . > I I .一.he series ofpartyr

52、ules, and do solid w ork, be qualifie dparty membersyhad asolid i de ologicalbasi s.Onlythe "ladofthe "pe dal" spirit;strengt working","Hong Kong report."henthe partymembers aStrong cleanup a-lear n-do-do" thevirturs and cadres"successup a ctions,stylea nd ram

53、blicle,a nd ultimats does not havet mbli ng,pre sumpttimately achieve thaveto be me" and"thefirstto bear mpt uous "unqual ified"party members,_ I . I - . 1I.hardships,the la stto" service spirittose tthepays specialattenti onto partymembersand caII . . n I I I _ II. - . |_L

54、.hefundamental obje ctiveofeducati on.T his re quirest hatthe Orga nizationroots partyorganizati ons "two" is to clea nse all people notha ppynot to se e "stereotype s",establishthe honestfaithful,diligentfaithforthepeople.No need to am."Partybuil ding"is obtai nedi n t

55、helong-term development of our party'shistoricalexperie ncea ccumulate d.Twois our party underthe newhi storicalconditi ons,strengt hecaon movemennotstandthe "money," corr osi onofnt." Grass -roots party organizati onsshoul16 .通常用球刀加工比較平滑的曲面時，表面粗糙度的質(zhì)量不會很高，這是因為C ）造成的A.行距不夠密B .球刀刀刃不

56、太鋒利C.球刀尖的切削速度幾乎為零17 .按一般情況，制作金屬切削刀具時，硬質(zhì)合金刀具的前角（C ）高速鋼刀具的前角A .大于 B .等于 C .小于18 .數(shù)控機床加工依賴于各種（C ）A .位置數(shù)據(jù)B .模擬量信息 C.數(shù)控化信息19 .影響刀具壽命的因素有（A ）A.工件材料刀具材料 刀具幾何參數(shù)切削用量B .工件材料刀具材料刀具幾何參數(shù)C.工件材料刀具材料切削速度20 .加工中心選刀方式中常用的是（C ）方式A.刀柄編碼 B .刀座編碼C.記憶21 .熱繼電器在控制電路中起的作用是（B ）A .短路保護(hù)B .過載保護(hù)C.失壓保護(hù)22 .數(shù)控機床長期不用時最重要的日常維護(hù)工件是（C ）A

57、.清潔 B .干燥C.通電23 .進(jìn)行輪廓銑削時，應(yīng)避免（ B ）工件輪廓A.切向切入B .法向切入 法向退出C.切向退出 法向退出24 .在數(shù)控機床的閉環(huán)控制系統(tǒng)中，其檢測環(huán)節(jié)具有兩個作用：一個是檢測出被測信號的大小，另一個作用是把被測信號轉(zhuǎn)換成可與（A ）進(jìn)行比較的物理量，從ntain theirvanguardColor, maintain theparty's advance d nat ureand purity.Awareness -raisi ng,ante nnas a nd atmosphereadi scussi on on how lea ding cadres

58、of party members "two" currecanresolvetostudyhar dfirst. Inthe "two"in而構(gòu)成反饋通道。A .指令信號 B .反饋信號 C.偏差信號25 .數(shù)控銃削加工前，應(yīng)進(jìn)行零件工藝過程設(shè)計和計算，包括加工順序，銃刀和工件的（A ）A.相對運動軌跡B.相對距離 C.位置調(diào)整26 .按照機床運動的控制軌跡分類，加工中心屬于（ C ）A .點位控制 B .直線控制C.輪廓控制27 .用數(shù)控銃床銃削凹模型腔時，粗精銃的余量可用改變銃刀直徑設(shè)置值的方法來控制，半精銃時，銃刀直徑設(shè)置值應(yīng)（ C ）銃刀實際直徑

59、值A(chǔ).小于B.等于C.大于28刀具半徑補償指令在返回零點狀態(tài)是（ B ）A.模態(tài)保持B.暫時抹消C.抹消29 .G28 X29 Y30 Z39 表示（ A ）A.從當(dāng)前點經(jīng)（29, 30, 39）返回參考點B.從當(dāng)前點返回到（29, 30, 39）C.從當(dāng)前點經(jīng)參考點返回到（29, 30, 39）點30 .球頭銃刀的球半徑通常（ C ）加工曲面的曲率半徑A.大于B.等于C.小于31 .選擇刀具起刀點時應(yīng)考慮（ A、B ）A.防止與工件或夾具干涉碰撞B.方便工件安裝與測量C.每把刀具刀尖在起始點的重合32 .在工件上既有平面需要加工，又有孔需要加工時，可采用（ B ）earninge ducat

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