Manufacturing method of multifunctional positioning pin hole

The utility model discloses a multifunctional positioning pin hole, which is applied to a cylinder block of an engine, and comprises a positioning pin hole section and a lubricating oil hole section connected in series. One end of the positioning pin hole section penetrates the surface of the cylinder body, and the other end extends into the cylinder body ; The lubricating oil hole section extends from the end surface of the cylinder body of the positioning pin hole section to the cylinder body until it communicates with the lubricating oil passage in the cylinder body. The utility model makes the arrangement of the engine cylinder block or cylinder head lubricating oil hole and the machining positioning pin hole more free space, so that the layout of the whole machine is simpler, and at the same time, the number of machining operations is reduced and the machining cost is reduced.

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