此次毕业设计属于冷冲压模具，冲压模具课程设计设计课题为下端盖切口弯曲模具，模具工序由斜刃冲裁和弯曲组成。
Graduation is this cold stamping die design issues for the next Cover incision bending dies die processes by bevelled punching and bending components.
在泵轴的下端，泵盖及泵体形成的内腔中设置有叶轮，叶轮上设有背叶片，并由锁紧螺钉紧固；
The impeller is arranged in an inner cavity formed by a pump cover and a pump body at the lower end of the pump shaft, and back blades are arranged on the impeller and are fastened by locking bolts;
更换滤料时，打开两个法兰盖，从下端的滤料出口排出旧滤料。
When replacing the filter materials, the two flange covers shall be opened, and the old filter materials will be discharged from the filter material outlet of the lower end.
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