【正文】
金屬切削原理》 機(jī)械工業(yè)出版社 2002年1月【10】蘆福楨主編 《金屬切削原理與刀具》 機(jī)械工業(yè)出版社 2008年2月【11】焦建民主編 《切削手冊》 電子工業(yè)出版社 2007年9月。編制機(jī)械加工工藝過程卡階梯軸加工工藝過程卡片(見附表1)編制機(jī)械加工工序卡片階梯軸加工工序卡片(見附表2)結(jié)論通過此次綜合實(shí)訓(xùn),讓我受益非淺,不僅培養(yǎng)了我們發(fā)現(xiàn)問題、分析問題、解決問題的邏輯思維能力,更重要的是學(xué)會了熟悉運(yùn)用機(jī)械制造工藝學(xué)中的基本理論實(shí)際知識解決零件在加工中的定位,夾緊,以及工藝路線安排,工藝尺寸確定等問題保證加工質(zhì)量。在半精車加工之后安排去毛刺和中間檢驗(yàn)工序。后加工次要表面,如銑鍵槽等。軸類零件各表面的設(shè)計(jì)基準(zhǔn)一般是軸的中心線,其加工的定位基準(zhǔn),最常用的是兩中心孔。主軸轉(zhuǎn)速為:95 r/min工序Ⅺ 粗磨φ3φ2φ20外圓面 (1)確定背吃刀量磨外圓,,2次行程,則ap=。,副偏角Kr’=5176。機(jī)床:X61W型萬能銑床;刀具:高速鋼圓柱銑刀。刀尖圓弧半徑為=。(2)選擇刀具磨鈍標(biāo)準(zhǔn)及耐用度:,耐用度為T=60min。后角α0=6176。,主偏角Kr=90176。(1)確定背吃刀量粗車外圓,加工余量為10mm,2次走刀,則單邊吃刀量為=10/4=。 (3)選擇刀具磨鈍標(biāo)準(zhǔn)及耐用度由《切削用量簡明手冊》。最終確定主軸轉(zhuǎn)速為:n=900r/min工序Ⅲ粗車階梯軸外圓Φ35mm:確定粗車外圓刀具類型:YT15硬質(zhì)合金焊接式車刀;刀具耐用度T=60min;刀桿尺寸16mm25mm;;γ0=10176。副后角α0’=6176。副后角α0’=6176。因此,此方案設(shè)計(jì)不合理。 15.精磨φ350 ,. ,. ,. 18.銑鍵槽:槽寬公差等級為IT7,槽深公差等級未注,需采用三面刃銑刀,粗銑、精銑。 精基準(zhǔn)的選擇 根據(jù)該階梯軸零件的技術(shù)要求和裝配要求,選擇該階梯軸軸線作為精基準(zhǔn),零件上的很多表面都可以采用它們作基準(zhǔn)進(jìn)行加工,即遵循了“基準(zhǔn)統(tǒng)一”的原則。 確定毛坯的尺寸公差 .公差等級: 由階梯軸的功能和技術(shù)要求,確定該零件的公差等級為普通級。,影響軸的同軸度和軸承的使用壽命。,中等精度,轉(zhuǎn)速較高。就我個(gè)人而言,我希望通過這次課程設(shè)計(jì)對自己未來將從事的工作進(jìn)行一次適應(yīng)性訓(xùn)練,從中鍛煉自己發(fā)現(xiàn)問題,分析問題和解決問題的能力,為今后參加工作打下良好的基礎(chǔ)。機(jī)床夾具對零件加工的質(zhì)量、生產(chǎn)率和產(chǎn)品成本都有著直接的影響。關(guān)鍵詞 :階梯軸 工藝規(guī)程 夾具 刀具 量具 耐磨性 AbstractSpindle is the core of the high speed machine tool features, it is good or bad directly affect the performance of the whole machine tool, this requests us in the design process to do further research. The procedure to design for the main shaft, launched a rigorous research and design.Lathe spindle is not only a single axis shaft, hollow shaft, the steps of the length to diameter ratio is less than 12 rigid shaft. Main processing surface is the surface of internal and external rotation, secondary surface with keyway, thread, and end face bined with holes, etc. Its mechanical processing mainly is turning and grinding, followed by milling and drilling. When turning, apply a clamp one or two top form. Avoid the shaft radial circular runout, which guarantees the stability of the processing of the workpiece, also make the workpiece dimensional accuracy.Grinding, use special hole grinding fixture, make consistent with the center line of the clamp workpiece axis, ensure the grinding hole of the inner hole machining accuracy.Turning and grinding using special fixture, cutting tools, measuring tool, not only ensure the dimensional accuracy, but also to reach a shaft assembly with other parts of tolerance and fit precision.To guarantee the cutting performance of the spindle, the finished product has enough hardness, wear resistance, shock resistance, and between different processing stages arranged heat treatment.Lathe spindle is one of the typical parts, processing is difficult, the craft route is longer, involves many basic process of shaft parts processing problem.Keywords: Process planning, Jig, The cutting tool, Measuring tool, Abrasive resistance序 言隨著科學(xué)技術(shù)的發(fā)展,各種新材料、新工藝和新技術(shù)不斷涌現(xiàn),機(jī)械制造工藝正向著高質(zhì)量、高生產(chǎn)率和低成本方向發(fā)展。它的機(jī)械加工主要是車削和磨削,其次是銑削和鉆削。主要加工表面是內(nèi)、外旋轉(zhuǎn)表面,次要表面有鍵槽、螺紋和