C 工艺系统振动
24、试解释转移原始误差法的原理并举例加以说明。
答：转移原始误差法就是把影响加工精度的原始误差转移到不影响（或少影响）加工精度的方向或其它零部件上去。例如，在成批生产中，采用前、后导向套的镗模加工箱体零件的孔，刀杆与主轴浮动联接，这也就是把机床主轴的回转误差转移掉，工件的加工精度完全由镗模和镗杆的精度来保证。 25、简述制定工艺规程的步骤？ 答：（1）分析零件图样 （2）确定毛坯类型或型材规格 （3）拟定工艺路线
（4）确定各工序的加工余量和工序尺寸及公差 （5）确定各工序的机床设备及工、夹、刀、量具 （6）确定切削用量 （7）确定工时定额
（8）填写工艺文件并完成审批手续
26、保证装配精度的方法有哪几种？说明其适用场合。
答：（1）互换法，适于装配零件少，生产批量大，零件可以用经济加工精度制造的场合。
（2）选配法，适于大批量生产中，装配精度要求高，装配零件数量少不便调整装配的场合。
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（3）修配法 ，适于单件小批生产，装配精度要求高的场合。
（4）调整法，除必须采用分组法的精密配件外，可用于各种装配场合。 27、圆周铣削法和端面铣削法的铣削方式各有哪些？如何合理选用？ 答：圆周铣削方式包括顺铣和逆铣。
顺铣和逆铣时，切入工件时的切削厚度不同，刀齿与工件的接触长度不同，铣刀的磨损程度不同。顺铣时，铣刀的耐用度可比逆铣时提高2-3倍，表面粗糙度也降低。顺铣不宜于铣削带硬皮的工件。在没有消除螺纹间隙装置的铣床上，只能采用逆铣，避免工作台的窜动和进给量不匀。 端面铣削法包括对称铣削、不对称逆铣和不对称顺铣。
在铣削碳钢和一般合金钢时，采用不对称逆铣，以减少切入时的冲击，提高硬质合金铣刀的耐用度。在加工 不锈钢和耐热合金时，采用不对称顺铣可以减少硬质合金的剥落磨损，提高切削速度。 1.爱屋及乌 Love me, love my dog. 2.百闻不如一见 Seeing is believing.
3.比上不足比下有余 worse off than some, better off than many; to fall short of the best, but be better than the worst.
4.笨鸟先飞 A slow sparrow should make an early start. 5.不眠之夜 white night
6.不以物喜不以己悲 not pleased by external gains, not saddened by personnal losses
7.不遗余力 spare no effort; go all out; do one's best 8.不打不成交 No discord, no concord. 9.拆东墙补西墙 rob Peter to pay Paul
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10.辞旧迎新 bid farewell to the old and usher in the new; ring out the old year and ring in the new
11.大事化小小事化了 try first to make their mistake sound less serious and then to reduce it to nothing at all
12.大开眼界 open one's eyes; broaden one's horizon; be an eye-opener 13.国泰民安 The country flourishes and people live in peace
14.过犹不及 going too far is as bad as not going far enough; beyond is as wrong as falling short; too much is as bad as too little
15.功夫不负有心人 Everything comes to him who waits. 16.好了伤疤忘了疼 once on shore, one prays no more
17.好事不出门恶事传千里 Good news never goes beyond the gate, while bad news spread far and wide.
18.和气生财 Harmony brings wealth.
19.活到老学到老 One is never too old to learn. 20.既往不咎 let bygones be bygones
21.金无足赤人无完人 Gold can't be pure and man can't be perfect. 22.金玉满堂 Treasures fill the home. 23.脚踏实地 be down-to-earth 24.脚踩两只船 sit on the fence
25.君子之交淡如水 the friendship between gentlemen is as pure as crystal; a hedge between keeps friendship green
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26.老生常谈陈词滥调 cut and dried, cliché 27.礼尚往来 Courtesy calls for reciprocity.
28.留得青山在不怕没柴烧 Where there is life, there is hope. 29.马到成功 achieve immediate victory; win instant success 30.名利双收 gain in both fame and wealth 31.茅塞顿开 be suddenly enlightened
32.没有规矩不成方圆 Nothing can be accomplished without norms or standards. 33.每逢佳节倍思亲 On festive occasions more than ever one thinks of one's dear ones far away.It is on the festival occasions when one misses his dear most. 34.谋事在人成事在天 The planning lies with man, the outcome with Heaven. Man proposes, God disposes.
35.弄巧成拙 be too smart by half; Cunning outwits itself 36.拿手好戏 masterpiece
37.赔了夫人又折兵 throw good money after bad
38.抛砖引玉 a modest spur to induce others to come forward with valuable contributions; throw a sprat to catch a whale
39.破釜沉舟 cut off all means of retreat；burn one?s own way of retreat and be determined to fight to the end
40.抢得先机 take the preemptive opportunities
41.巧妇难为无米之炊 If you have no hand you can't make a fist. One can't make bricks without straw.
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42.千里之行始于足下 a thousand-li journey begins with the first step--the highest eminence is to be gained step by step
43.前事不忘后事之师 Past experience, if not forgotten, is a guide for the future. 44.前人栽树后人乘凉 One generation plants the trees in whose shade another generation rests.One sows and another reaps.
45.前怕狼后怕虎 fear the wolf in front and the tiger behind hesitate in doing something
46.强龙难压地头蛇 Even a dragon (from the outside) finds it hard to control a snake in its old haunt - Powerful outsiders can hardly afford to neglect local bullies.
47.强强联手 win-win co-operation
48.瑞雪兆丰年 A timely snow promises a good harvest. 49.人之初性本善 Man's nature at birth is good. 50.人逢喜事精神爽 Joy puts heart into a man. 51.人海战术 huge-crowd strategy
52.世上无难事只要肯攀登 Where there is a will, there is a way.
53.世外桃源 a fictitious land of peace away from the turmoil of the world; 54.死而后已 until my heart stops beating 55.岁岁平安 Peace all year round.
56.上有天堂下有苏杭 Just as there is paradise in heaven, ther are Suzhou and Hangzhou on earth
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机电一体化试题及答案
