Hydraulic valve block V

Drilling and tapping shall be carried out according to the design requirements of the hydraulic valve block processing drawings: the slender hole shall be processed first, and then the short and coarse hole shall be processed. There shall be no flash and burr at the intersection of the two holes. The perpendicularity error between the thread hole and the base plane of all fine thread is not more than 0.03mm; Thread accuracy shall be in accordance with 6h specified in GB 197; The thread surface shall be free of defects such as black skin, crack, bump, burr, double tooth tip and incomplete buckle; The depth of coarse thread is twice the diameter of thread (unless otherwise specified in the drawing). Before the thread is machined, the screw in side is chamfered by 60 ° and the chamfering depth is equal to the bolt chamfering depth. The oil hole in the oil circuit block makes the pressure drop of fluid flowing through the channel in the whole working temperature and flow capacity range of the system, which will not adversely affect the efficiency and response of the system.