▎ 摘　　要

NOVELTY - The utility model claims a scraper local preheating device based on graphene coating ring, comprising an annular ceramic scrapers, feeding device, a temperature sensor, a heating plate and a grounding device; the annular ceramic scraper is fixedly connected with the scraper splint through fastening bolt, the scraper splint through the pad by connecting bolt connected with the guide screw, the feeding device is a quantitative powder feeding device; the temperature sensor is set on the annular ceramic drawknife inside one end of the temperature sensor is electrically connected with the central controller; the heating plate is above the annular ceramic scrapers, and can synchronously move; the grounding device with the annular ceramic scraper is connected with the inner wall. The utility model improves the metal powder preheating, can obviously improve the powder flow ability, uniformly formed temperature field distribution in the cylinder, the scraper can be local preheating, and the ceramic body has insulating effect, so as to improve the forming property of the part, and it saves energy, increases production efficiency, and obviously prolongs the service life of the device.