Method for preparing automobile turbocharging cylinder by using plastic instead of steel

The invention discloses a preparation method for replacing steel with plastic for an automobile turbocharging cylinder body, which comprises the following steps: S1, material selection: selecting a base material; s2, a cylinder body product is designed, specifically, the product shape of the cylinder body is determined according to the strength, the internal stress and the size precision of the turbocharging cylinder body; s3, designing a mold for injection molding of the cylinder body, and confirming the roundness, coaxiality, cylindricity, location degree and roughness of the injection mold according to the product design in the above steps; and S4, a DOE injection molding technology is adopted, the temperature, the pressure, the time and the beat in the cylinder body injection molding process are confirmed, and the structural strength of the injection molded cylinder body is ensured. According to the invention, the plastic part and the injection mold are subjected to process improvement, and a traditional