Piston and machining technology thereof

The invention discloses a machining technology of a piston. The technology comprises the following steps that 1) roughly grinding is carried out on an piston outer cylindrical working surface ; 2) anoil groove and a technology groove are lathed in the piston outer cylindrical working surface; 3) milling is carried out on a piston outer cylindrical face thoroughly; 4) finely grinding is carried out on the piston outer cylindrical working surface, the piston outer cylindrical face and the piston outer cylindrical face; and 5 ) the outer cylindrical face is lathed, positioning is carried out according to the inner cavity non-working face of the piston, the inner cavity non-working face of the piston is positioned through a positioning tool, and tight clamping points are arranged on the non-working face of the piston. According to the technology, the structure is mainly designed in cooperation with the machining technology of the invention, the structure is further improved at the same time, compared with a tradi