机械工业设计基础关于连接座课程设计

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1、目录一、零件分析1.零件的作用························································32.零件的工艺分析····················································33.确定零件的生产类型················································4二、确定毛坯类型绘制毛坯草图1.选择毛坯··························································52.确定毛坯

2、的尺寸公差和机械加工余量··································53.绘制连接座铸造毛坯简图············································6三、工艺规程设计1.定位基准的选择····················································62.拟定工艺路线······················································7-21-3.加工设备及工艺装备的选用·······················

3、···················94.加工余量、工序尺寸和公差的确定···································105.切削用量的计算···················································136.时间定额的计算···················································15四、专用钻床夹具设计1.夹具设计任务·····················································162.拟定钻床夹具

4、结构方案与绘制夹具草图·······························163.绘制夹具装配总图·················································194.夹具专用零件图设计绘制···········································19致谢·······························································22参考文献·············································

5、··············22-21-附录·······························································22一、零件分析1.零件的作用该零件是离心式微电机水泵上的连接座，是用来连接水泵和电机的.左端Ф125外圆与水泵泵壳连接，水泵叶轮在Ф100孔内，通过4个螺钉固定;右端Ф121外圆与电动机机座连接,Ф40孔与轴承配合,通过3个螺栓固定，实现水泵与电动机的连接，从而起连接固定作用2.零件的工艺分析由零件图可知，其材料为HT200，该材料为灰铸铁，具有较高强度，耐磨性，耐热性及减振性，适用

6、于承受较大应力,要求耐磨的零件,通常可用作机座、泵体的连接座等。连接座共有两组加工表面，他们之间有一定的位置要求。现分述如下：右端面的加工表面：这一组加工表面包括：右端面Φ121的外圆，粗糙度为3.2、6.3；外径为Φ50、内径为Φ40的小凸台，粗糙度为3.2，并带有倒角；Φ32的小凹槽，粗糙度为25；钻Φ17.5的中心孔，钻Φ7通孔。其工序采取先粗车——半精车——精车。其中Φ17.5、Φ40的孔或内圆直接在车床上进行初镗——半精镗，Φ40的内圆的半精镗的基础上再精镗就可以了。左端的加工表面：  这一组加工表面包括：左端面，Φ1250-0.025外圆，

7、Φ1000+0.035内圆，倒角，钻通孔Φ7，钻孔并攻丝。这一部份只有端面有6.3的粗糙度要求，Φ1000+0.035的内圆孔有25的粗糙度要求。采用的工序可以是先粗车——半精车——精车。孔加工为钻孔-扩钻-扩孔。-21-该零件上的主要加工面是Φ40的孔，Φ1250-0.025的外圆和Φ121的外圆。Φ40孔的尺寸精度直接影响连接座与轴承的配合精度，Φ1250-0.025的尺寸精度直接影响连接座与水泵的接触精度和密封性，121的尺寸精度直接影响连接座与电机的接触精度和密封性。由参考文献【5】中有关和孔加工的经济加工精度及机床能达到的位置精度可知,上要求

8、是可以达到的。零件的结构工艺性也是可行的。3.零件的生产类型依设计任务可知：产品的年产量为55