毕业论文(设计)——连杆零件机械加工工艺规程及夹具设计详解.docVIP

毕业论文(设计)——连杆零件机械加工工艺规程及夹具设计 processing technological process He machine-finishing craft realizes the product design guaranteed the product quality saves the energy reduces the consumption the important method It means using machining operation to change the blanks shape size relative position and quality to make the blank become the qualified product Processing technology is the basis for workers Such as rough production mechanical operations heat-treatment assembling are all called processing procedure All of these process are quite important during the designing such as lying down technical schedule resolving of dimension conforming machining allowance labor time standard calculation According to these designing we learn more about work piece process and confirming of finish size Moreover we know that the confirming of technological line and finishing allowance must based on the machine tool During the designing we still need to consider the install and fastening motion of workpiece Because the rightness install will affect the workpieces accuracy and working hours All in all it is both important and difficult point of this design When designing this topic penetrates the production reality conducts the investigation and study formulates the reasonable design proposal is carrying on the concrete designing Key words latter bracket processing craftjig 目 录 第一章 零件的分析 11CA6140车床后托架的用途 12计算生产纲领确定生产类型1 13零件的工艺分析1 第二章 工艺规程的设计 21确定毛坯的制造形式2 22毛坯的结构工艺要求2 23毛坯形状尺寸确定的要求2 24毛坯的尺寸公差和机械加工余量的确定2 25基准的选择3 26工序顺序的安排3 27制定工艺路线4 28确定切削用量及基本公式6 第三章 夹具设计 31定位基准的选择17 32定位误差分析17 结束语20 致谢21 主要参考文献 22 第一章 零件的分析 11CA6140车床后托架的用途 后托架在CA6140车床床身的尾部三个孔分别装丝杠光杠转向开关加强固定在40mm和302mm之间的孔为毛线孔导通油路旁路的螺纹孔连接油盖正面的四个孔将后托架固定车床尾部 零件图上为CA6140车床上的后托架生产量为2000件该产品属于轻型机械根据表1-3生产类型与生产纲领等的关系可确定其生产类型为中批生产 13零件的工艺分析 CA6140车床后托架共有两组表面他们之间有一定的位置要求现叙述如下 以40mm的孔为中心的加工表面这一组加工表面分别为40mm 302mm及255mm的孔两沉头孔为20mm两装配铰孔13mm深孔为6mm螺纹为M6两销孔其中主要加工表面为40mm302mm及255mm的三个孔 以底面120×60mm为中心的加工表面这一组加