CA6140车床后托架加工工艺及夹具设计学生姓名：林果学生学号：070105115院（系）：工学院年级专业：07级机电一体化指导教师：杨汉嵩目录摘要.....................................................................................................................................................I1CA6140机床后托架加工工艺....................................................................................................21.1CA6140机床后托架的工艺分析..........................................................................................21.2CA6140机床后托架的工艺要求及工艺分析......................................................................21.2.1CA6140机床`后托架的技术要求................................................................................31.3加工工艺过程......................................................................................................................31.4确定各表面加工方案...........................................................................................................41.4.1在选择各表面及孔的加工方法时，要综合考虑以下因素.......................................41.4.2平面的加工..................................................................................................................41.4.3孔的加工方案................................................................................................................41.5确定定位基准......................................................................................................................41.5.1粗基准的选择..............................................................................................................51.5.2精基准选择的原则.......................................................................................................61.6工艺路线的拟订..................................................................................................................61.6.1工序的合理组合............................................................................................................61.6.2工序的集中与分散.......................................................................................................71.6.3加工阶段的划分...........................................................................................................71.6.4加工工艺路线方案的比较...........................................................................................71.7CA6140机床后托架的偏差，加工余量，工序尺寸及毛坯尺寸的确定..........................81.7.1毛坯的结构工艺要求...................................................................................................91.7.2CA6140机床后托架的偏差计算................................................................................101.8确定切削用量及基本工时（机动时间）.........................................................................141.8.1工序1：粗、精铣底面..............................................................................................141.8.2工序2粗、半精、精镗CA6140侧面三杠孔.........................................................151.8.3工序3：钻顶面四孔..................................................................................................201.8.4工序4：钻侧面两孔..................................................................................................231.9时间定额计算及生产安排.........................
