【正文】
車65外圓 實(shí)際切削速度 V== 計(jì)算切削工時(shí): 按切削手冊(cè),取 L=17mm, L=3mm, L=0mmt=(2) 粗車75外圓取 n=305r/min 實(shí)際切削速度 V==計(jì)算切削工時(shí): 按切削手冊(cè),取 L=83mm, L=3mm, L=0mmt=(3) 粗車100外圓取 n=305r/min實(shí)際切削速度 V==計(jì)算切削工時(shí): 按切削手冊(cè),取L=15mm, L=3mm, L=0mmt=(4) ,r= 根據(jù)《機(jī)械加工工藝師手冊(cè)》表278取 f=n=305r/min計(jì)算切削工時(shí)L=9mm, L=3mm, L=0mmt=Ⅲ 鉆擴(kuò)mm、及锪孔。如果選995r/min,則速度損失較大。, , 則:=(2) 2Z=, Z=f=v=80m/min計(jì)算切削工時(shí), , 則:=(3) 細(xì)鏜孔至mm由于細(xì)鏜與精鏜孔時(shí)共用一個(gè)鏜桿,利用金剛鏜床同時(shí)對(duì)工件精、細(xì)鏜孔,故切削用量及工時(shí)均與精樘相同。計(jì)算切削工時(shí)L=(60mm30mm)=30mm倒角1x45176。锪鉆 工序Ⅷ:磨Φ60孔底面①.選擇磨床:選用MD1158(內(nèi)圓磨床)②.選擇砂輪:見《工藝手冊(cè)》第三章中磨料選擇各表,結(jié)果為A36KV6P 20x6x8mm③.切削用量的選擇:砂輪轉(zhuǎn)速 ,m/s軸向進(jìn)給量 徑向進(jìn)給量 ④.切削工時(shí)計(jì)算: 當(dāng)加工一個(gè)表面時(shí)(見《工藝手冊(cè)》)式中 L:加工長(zhǎng)度 L=30mm b:加工寬度 b=30mm :?jiǎn)挝患庸び嗔? = K: 系數(shù) K= r: 工作臺(tái)移動(dòng)速度(m/min) :工作臺(tái)往返一次砂輪軸向進(jìn)給量 : 工作臺(tái)往返一次砂輪徑向進(jìn)給量則 Ⅸ: 鏜Φ60mm孔底溝槽內(nèi)孔車刀 保證t=,d=2mm 工序Ⅹ: 研磨Φ60mm孔底面采用手工研具進(jìn)行手工研磨:Z=3專用夾具設(shè)計(jì)為了提高勞動(dòng)生產(chǎn)率,保證加工質(zhì)量,降低勞動(dòng)強(qiáng)度,需要設(shè)計(jì)專用夾具。本夾具將用于Z3025搖臂鉆床。 問題的指出本夾具主要用來鉆12孔,由于工藝要求不高,因此,在本道工序加工時(shí),主要應(yīng)考慮如何提高勞動(dòng)生產(chǎn)率,降低勞動(dòng)強(qiáng)度。其設(shè)計(jì)基準(zhǔn)為兩對(duì)稱孔中心距,由于難以使工藝基準(zhǔn)與設(shè)計(jì)基準(zhǔn)統(tǒng)一,只能以65外圓面作為定位基準(zhǔn)。同時(shí),為了縮短輔助時(shí)間,準(zhǔn)備采用氣動(dòng)夾緊。 則軸向力:見《工藝師手冊(cè)》F=Cdfk…………………………………… 式中: C=420, Z=, y=, f= k=(F=420轉(zhuǎn)矩T=Cdfk式中: C=, Z=, y=T=功率 P=在計(jì)算切削力時(shí),必須考慮安全系數(shù),安全系數(shù) K=KKKK式中 K—基本安全系數(shù)。K—刀具鈍化系數(shù), 。當(dāng)壓縮空氣單位壓力P=,夾緊拉桿。 定位誤差的分析 定位元件尺寸及公差的確定。 夾具設(shè)計(jì)及操作的簡(jiǎn)要說明 如前所述,在設(shè)計(jì)夾具時(shí),為提高勞動(dòng)生產(chǎn)率,應(yīng)首先著眼于機(jī)動(dòng)夾具,本道工序的鉆床夾具選用氣動(dòng)夾緊方式。因此,應(yīng)設(shè)法降低切削力。結(jié)果,本夾具結(jié)構(gòu)比較緊湊。參考資料1.《機(jī)床夾具設(shè)計(jì)》 第2版 肖繼德 陳寧平主編 機(jī)械工業(yè)出版社2.《機(jī)械制造工藝及專用夾具設(shè)計(jì)指導(dǎo)》 孫麗媛主編 冶金工業(yè)出版社3.《機(jī)械制造工藝學(xué)》周昌治、楊忠鑒等 重慶大學(xué)出版社4. 《機(jī)械制造工藝設(shè)計(jì)簡(jiǎn)明手冊(cè)》李益民 主編 機(jī)械工業(yè)出版社5. 《工藝師手冊(cè)》 楊叔子主編 機(jī)械工業(yè)出版社6. 《機(jī)床夾具設(shè)計(jì)手冊(cè)》 王光斗、王春福主編 上??萍汲霭嫔?. 《機(jī)床專用夾具設(shè)計(jì)圖冊(cè)》南京市機(jī)械研究所 主編 機(jī)械工業(yè)出版社8. 《機(jī)械原理課程設(shè)計(jì)手冊(cè)》 鄒慧君主編 機(jī)械工業(yè)出版社9.《金屬切削手冊(cè)》第三版 上海市金屬切削技術(shù)協(xié)會(huì) 上??茖W(xué)技術(shù)出版社10.《幾何量公差與檢測(cè)》第五版 甘永立 主編 上??茖W(xué)技術(shù)出版社 11.《機(jī)械制造工藝水學(xué)》、《機(jī)床夾具設(shè)計(jì)》 (教材)12.《機(jī)械零件設(shè)計(jì)手冊(cè)》13.《機(jī)械制造工藝學(xué)課程設(shè)計(jì)指導(dǎo)書》, 機(jī)械工業(yè)出版社14.《機(jī)床夾具設(shè)計(jì)》 王啟平主編 哈工大出版社15 《汽車制造工藝學(xué)》 侯家駒主編 機(jī)械工業(yè)出版社16.《汽車構(gòu)造與修理圖解》 唐藝 主編 機(jī)械工業(yè)出版社17.《汽車傳動(dòng)與行使部分檢修問答》 劉文舉 主編 人民郵電出版社致謝 經(jīng)馬志燕的悉心指教。 通過這次走向工作實(shí)踐前的最后一次綜合練兵。查閱大量資料的習(xí)慣及方法。 The packing box divulges。 Countermeasure1 foreword adjustment valve is the petroleum chemical industry refines oil in the installment the essential part, its use adjustment valve type many, quantity big, in the chemical production medium many is corrosiveness strong, virulent or is flammable explosive, when adjusts the valve divulges, not only can create the serious raw material, the energy and the product waste, moreover also has the serious influence to the environment, even causes the serious security accident.. Therefore, we have the necessity also to have to take in the petroleum chemical industry production process to adjust the valve to divulge the question. Under causes the reason on the petroleum chemical industry installment in which the adjustment valve packing box divulges as well as prevented divulges the countermeasure, the method with the elimination makes the key discussion.2 adjustments valves packing box divulges the reason analysis adjustment valve divulges divides into two kinds, namely outside divulges with the interior divulges. In the majority situation, outside divulges the consequence which creates, often divulges pared to the interior seriously.In the industrial production, adjusts the valve outside to leak not only creates the raw material and the energy waste, but also can directly pollute the environment, even causes the fire, the detonation, is poisoned and so on the harm safety significant accident, the national economy creates the heavy loss for. Outside but the packing box divulges also belongs leaks. The packing box divulges reason: The packing box by the st