连杆大头孔精镗夹具与工艺设计Word格式文档下载.docx
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连杆大头孔精镗夹具与工艺设计Word格式文档下载.docx
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连杆的结构特点.........................................................................................4
连杆的主要技术要求.................................................................................4
大、小头孔的尺寸精度、形状精度...............................................5
大、小头孔轴心线在两个互相垂直方向的平行度.......................5
大、小头孔中心距...........................................................................5
连杆大头孔两端面对大头孔中心线的垂直度...............................5
大、小头孔两端面的技术要求.......................................................5
螺栓孔的技术要求...........................................................................6
有关结合面的技术要求...................................................................6
连杆的机械加工工艺过程分析...............................................................10
工艺过程的安排.............................................................................10
定位基准的选择.............................................................................11
确定合理的夹紧方法.....................................................................12
连杆两端面的加工.........................................................................12
连杆大、小头孔的加工.................................................................12
连杆螺栓孔的加工.........................................................................13
连杆体与连杆盖的铣开工序.........................................................13
大头侧面的加工.............................................................................13
连杆加工工艺设计应考虑的问题...........................................................13
工序安排.......................................................................................13
定位基准.......................................................................................13
夹具使用.......................................................................................14
切削用量的选择原则...............................................................................14
粗加工时切削用量的选择原则.....................................................14
精加工时切削用量的选择原则.....................................................15
确定各工序的加工余量、计算工序尺寸及公差...................................15
确定加工余量.................................................................................15
确定工序尺寸及其公差.................................................................16
计算工艺尺寸链.......................................................................................17
连杆盖的卡瓦槽的计算.................................................................17
连杆体的卡瓦槽的计算.................................................................18
工时定额的计算.....................................................................................19
铣连杆大小头平面.......................................................................19
粗磨大小头平面...........................................................................19
加工小头孔...................................................................................20
铣大头两侧面...............................................................................21
、扩大头孔.....................................................................................21
铣开连杆体和盖...........................................................................22
加工连杆体...................................................................................22
铣、磨连杆盖结合面...................................................................24
铣、钻、镗连杆总成体...............................................................26
粗镗大头孔.................................................................................27
大头孔两端倒角.........................................................................27
精磨大小头两平面......................................................................28
半精镗大头孔及精镗小头孔.....................................................28
精镗大头孔..................................................................................28
小头孔两端倒角.........................................................................29
镗小头孔衬套.............................................................................29
珩磨大头孔.................................................................................29
连杆的检验......................................................................................30
观察外表缺陷及目测表面粗糙度...............................................30
连杆大头孔圆柱度的检验...........................................................30
连杆体、连杆上盖对大头孔中心线的对称度的检验...............30
连杆大小头孔平行度的检验.......................................................30
连杆螺钉孔与结合面垂直度的检验...........................................31
第二章
铣剖分面夹具设计...................................................................................31
问题的指出...........................................................
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- 连杆 大头 孔精镗 夹具 工艺 设计