機(jī)械制造課程設(shè)計(jì)說明書范本-預(yù)覽頁
【正文】 =64m/min Pm=計(jì)算實(shí)際主軸轉(zhuǎn)速主軸轉(zhuǎn)速n=100064/（20）= r/min ,查表得n=1000 r/min ，計(jì)算Vc=100020/1000= m/min功率校核PM= kwP經(jīng)檢查所有要求符合要求 工步二：精銑叉口上端面選擇鑲齒套式面銑刀，齒數(shù)z=10，材料YG6，fz=。工步四：精銑叉口中間的側(cè)面轉(zhuǎn)速及切削速度同上。Tj與Ｔf和稱為作業(yè)時(shí)間 Tb是指布置工作時(shí)間，一般按作業(yè)時(shí)間的（２７）％估算 Tx是指休息及生理需要時(shí)間，一般按作業(yè)時(shí)間的（２４）％估算 Tz是指準(zhǔn)備與終結(jié)時(shí)間，大量生產(chǎn)時(shí)，準(zhǔn)備與終結(jié)時(shí)間忽略不計(jì) ?。问侵敢慌慵膫€(gè)數(shù)下表是各個(gè)工步基本時(shí)間的計(jì)算公式及其結(jié)果工序工步計(jì)算公式計(jì)算結(jié)果（min）工序一1鉆：Tj=(l+l1+l2)/(fn)l=16l1=D/2cotKa+(12) l2:(14)Ka=90176。ae寬度 d:銑刀直徑23工序四1銑：Tj=(l+l1)/(fn)l1=(d )+(13)Ka=90176。23工序六12 工序額的確定（1）Td=Tj+Tf+Tb+Tx+Tz/N = Tj1～19+ Tf+Tb+Tx = (Tj1Tj19)+18% (Tj1Tj19)+5%( Tj+Tf)+3% ( Tj+Tf) = (Tj1Tj19)+18% (Tj1Tj19)+5%（(Tj1Tj19)+18% (Tj1Tj19)）+3% （(Tj1Tj19)+18% (Tj1Tj19)）Tj=+……+=Td=+18%+5%(+18%)+3%(+18%) = =192s(2)工序二的時(shí)間定額：Td=Tj+Tf+Tb+Tx+Tz/N =Tj1+Tj2+Tj3+Tf+Tb+Tx =(Tj1+……+Tj5)+ 18% (Tj1+……Tj5)+ 5%(Tj+Tf)+ 3% (Tj+Tf) =(Tj1+……+Tj5) + 18% (Tj1+……Tj5)+ 5%((Tj1+……+Tj5)+ 18% (Tj1+……Tj5))+3%((Tj1+……+Tj5)+ 18% (Tj1+……Tj5))Tj=++++=Td=+18%+5%(+18%)+3%(+18%) = =(3)工序三的時(shí)間定額：Td=Tj+Tf+Tb+Tx+Tz/N =Tj1+Tj2+Tj3+Tf+Tb+Tx =Tj1+18% Tj1+5%(Tj+Tf) + 3% (Tj+Tf) = Tj1+18% Tj1+5%( Tj1+18% Tj1)+ 3%( Tj1+18% Tj1) =+18%+5%(+18%)+3%(+18%) = =（4）工序四的時(shí)間定額：Td=Tj+Tf+Tb+Tx+Tz/N =Tj1+Tj2+Tj3+Tf+Tb+Tx =Tj1+18% Tj1+5%(Tj+Tf) + 3% (Tj+Tf) = Tj1+18% Tj1+5%( Tj1+18% Tj1)+ 3%( Tj1+18% Tj1) =+18%+5%(+18%)+3%(+18%) =（5）工序五德時(shí)間定額：Td=Tj+Tf+Tb+Tx+Tz/N =Tj1+Tj2+Tj3+Tf+Tb+Tx =Tj1+18% Tj1+5%(Tj+Tf) + 3% (Tj+Tf) = Tj1+18% Tj1+5%( Tj1+18% Tj1)+ 3%( Tj1+18% Tj1) =+18%+5%(+18%)+3%(+18%) =（6）工序六的時(shí)間定額：Td=Tj+Tf+Tb+Tx+Tz/N =Tj1+Tj2+Tj3+Tf+Tb+Tx =Tj1+18% Tj1+5%(Tj+Tf) + 3% (Tj+Tf) = Tj1+18% Tj1+5%( Tj1+18% Tj1)+ 3%( Tj1+18% Tj1) =+18%+5%(+18%)+3%(+18%) =第七章：夾具的設(shè)計(jì)本夾具是用立式銑床加工換擋叉的叉口下表面專用夾具。為防止換擋叉轉(zhuǎn)動(dòng)，在叉口內(nèi)側(cè)加一定位螺栓，讓換擋叉內(nèi)側(cè)和螺栓的兩側(cè)面可靠接觸。夾具的結(jié)構(gòu)設(shè)計(jì)詳見裝配圖。 參考文獻(xiàn)致 謝機(jī)械制造工藝學(xué)課程設(shè)計(jì)是學(xué)完了機(jī)械制造工藝學(xué)基礎(chǔ)和大部分專業(yè)課，并進(jìn)行了生產(chǎn)實(shí)習(xí)的基礎(chǔ)上進(jìn)行的又一個(gè)實(shí)踐性教學(xué)環(huán)
環(huán)評(píng)公示相關(guān)推薦
鄂ICP備17016276號(hào)-1