MACHINING SYSTEM AND MACHINING METHOD FOR PROVIDING VARIABLE-PRESSURE ENVIRONMENT

Provided are a machining system and machining method for providing a variable-pressure environment, suitable for use in additive manufacturing and subtractive manufacturing, such as metal additive andsubtractive manufacturing, composite additive and subtractive manufacturing, and ultrasonic additive manufacturing. The machining system provides a variable pressure environment in a sealed pressurevessel, such that machining can be performed in a positive-pressure environment; thus for a machining process involving metal as a starting material, the various problems caused by the metallurgical deficiencies of metals can be effectively inhibited. In said system, an inert-gas supply compartment (50) can be safe and stable for the positive-pressure environment, and thus a machining process wherein sustained uniform positive pressure is applied can be performed. In addition, it is possible to further control the temperature of the positive-pressure environment so as to ensure the stability of the temperature of the p