钻扩铰连杆螺栓孔夹具设计说明书.docx

课程设计说明书

机床夹具设计钻、扩、铰连杆大头孔与连杆盖的螺栓孔夹具

指导教师

学院名称工程学院专业及班级机械设计制造及其自动化1班提交日期答辩日期月

【摘要】连杆是发动机的主要传动件之一，本文主要论述了连杆的加工工艺及其中一个加工环节的夹具设计。通过计算连杆的尺寸精度、形状精度以及位置精度，选择合适的夹具方案，设计出能保证加工精度的专用夹具。

【关键词】连杆加工工艺夹具设计

目录
1序言····································································1
2零件设计具体内容·························································1
2.1零件的作用·····························································1
2.2零件的工艺性分析······················································1
2.2.1大、小头孔的尺寸精度、形状精度······································1
2.2.2大、小头孔轴心线在两个方向的平行度···································2
2.2.3大、小头孔中心距·····················································2
2.2.4大头孔两端面对大头孔中心线的垂直度···································2
2.2.5大、小头孔两端面的技术要求···········································2
2.2.6螺栓孔的技术要求·····················································2
2.2.7有关结合面的技术要求·················································2
2.3零件工艺路线的制定·····················································3
2.4确定工序的加工余量、工序尺寸及公差·····································7
2.4.1大头孔端面加工余量···················································7
2.4.2大头孔外圆加工余量···················································7
2.4.3小头孔端面加工余量···················································8
2.4.4连杆体结合面加工余量·················································8
2.4.5螺栓座端面加工余量···················································8
2.4.6小头孔加工余量·······················································9
2.4.7大头孔加工余量·······················································9
2.4.8螺栓孔加工余量·······················································9
2.5确定切削用及基本工时··················································10
2.5.1粗铣大小头孔两端面··················································10
2.5.2粗磨大头孔两端面····················································10
2.5.3精磨大头孔两端面····················································11
2.5.4粗铣大头孔两侧面····················································11
2.5.5粗车大头孔外圆表面·························