【正文】
893706AbstractThe main research connecting rod bearing processing technology and phi 12 mmH7 fixture design. Connecting the size accuracy, the bearing and the position precision of shape accuracy requirements are very high, and the rigidity of the connecting rod is poorer, plex shape, easy to produce the deformation, so in arrangement process, they need to put the main surface finishing process coarse apart, and that process focus, and gradually reduce machining allowance, cutting force and stress, and the effect of correction of the deformation after processing, can finally achieved the ponents the technical requirements. Fixture design USES special machine tool fixtures, the first principle of the workpiece position at six positioning, ensure positioning error, under the premise of fixture design to meet hole process accuracy.Keywords: connecting rod bearing special machine tool fixtures accuracy 目錄一、零件的分析 1 1 1 2 2二、毛坯的設(shè)計(jì) 3 3 3三、選擇加工方法,擬定工藝路線 4 4 4 4四、機(jī)械加工余量、工序尺寸及公差的確定 5 6 6五、確定切削用量及時(shí)間定額 8 切削用量的計(jì)算 8 8 8. 精鉸孔至Φ12mm 8 9 9 9 其他時(shí)間的計(jì)算 10 10六、機(jī)床夾具設(shè)計(jì) 10 216。其余表面和孔通過(guò)鑄造直接獲得。在時(shí)效處理后,要對(duì)鑄件進(jìn)行涂料,以免鑄件表面被破壞。在裝夾連桿支座時(shí),連桿支座的下端面既是定位基準(zhǔn)又是設(shè)計(jì)基準(zhǔn),用它作為精基準(zhǔn),能使加工遵循基準(zhǔn)重合的原則。(1)背吃刀量的確定ap=(2)確定進(jìn)給量 由表522得 選取該工步的每轉(zhuǎn)進(jìn)給量f=(3)確定切削速度 由表522,按工件材料為HT150的條件選取,切削速度v=22m/(51) n=1000v/πd可求得改工序鉆頭轉(zhuǎn)速n=,參照表49所列Z525型立式鉆床的主軸轉(zhuǎn)速,取n=960r/min。將上述結(jié)果代入公式,則該工序的基本時(shí)間tj=。(3) 精鉸工步根據(jù)表541,鉸圓柱孔的基本時(shí)間可由公式 tj =L/fn=(l+l1+l2)/fn 求得。粗鉸工步的輔助時(shí)間為:ta==。精鉸工步tdj精鉸=++= 因此,此工序的單件時(shí)間tdj=tdj鉆+tdj粗鉸+tdj粗鉸=++= 六、機(jī)床夾具設(shè)計(jì) 216。12mm孔之前,216。夾具體為鑄造件,安裝穩(wěn)定,剛度好,但制造周期較長(zhǎng)。通過(guò)設(shè)計(jì),培養(yǎng)了我獨(dú)立思考問(wèn)題和解決問(wèn)題的能力,樹(shù)立了正確的設(shè)計(jì)思想,掌握了零件產(chǎn)品設(shè)計(jì)的基本方法和步驟,設(shè)計(jì)的過(guò)程使我能熟悉地查找和應(yīng)用有關(guān)參考資料、計(jì)算圖表、手冊(cè)、圖冊(cè)、國(guó)家標(biāo)準(zhǔn)。[1]. [M].北京:機(jī)械工業(yè)出版社,[2].. 北京:清華大學(xué)出版社,[3].[M].上海:上??茖W(xué)技術(shù)出版,.[4].:機(jī)械工業(yè)出版社,[5].: 機(jī)械工業(yè)出版社,[6].艾興,:機(jī)械工業(yè)出版社[7].:高等教育出版社,[8].,: 機(jī)械工業(yè)出版社,[9].: 機(jī)械工業(yè)出版社,[10].機(jī)械制造技術(shù)基礎(chǔ)課程設(shè)計(jì)指導(dǎo)書(shū)