Technological experimental research for cross wedge rolling technology of pin valve of oil pump has been introduced with problems and relevant solutions during the process.
介绍了油泵油嘴针阀体的楔横轧工艺试验，以及在试验中遇到的问题及解决方法。
2
The body and wedge are malleable iron. The cotter pin is stainess steel. The other parts are steel. All ferrous parts are hot-dipgalvaized.